JP6894684B2 - Flow path covering treatment method for concrete structures and covering cylinders used for it - Google Patents

Description

The present invention has, for example, a structure made of concrete in an uninterrupted state in a pipeline expansion work in a reservoir such as an existing reinforced concrete water purification pond / drainage pond, or a pipeline construction accompanying a new construction of a reinforced concrete reservoir. The present invention relates to a technique for processing a flow path formed through a body through a drilling device.

As a technique for drilling a flow path in a concrete structure in a continuous flow state, for example, there is a method for drilling a concrete structure disclosed in Patent Document 1. In this drilling method, a sluice valve is attached to a planned drilling location on the outer surface of a concrete structure via a short pipe having an inner diameter that allows the cylindrical cutter of the drilling device to move in and out, and the sluice device is attached to the sluice valve. Then, the sluice valve is opened and the cylindrical cutter of the piercing device is fed through the inside of the sluice valve and the short pipe to form a flow path through the planned piercing portion of the concrete structure.
After drilling, the cylindrical cutter of the drilling device is moved back to the initial standby position through the inside of the short pipe and the sluice valve, the sluice valve is closed, and then the drilling device is removed from the sluice valve. After that, piping work for branching is performed on the sluice valve.

Japanese Unexamined Patent Publication No. 2014-21803

In the above-mentioned drilling method, since the drilling port of the structure drilled by the cylindrical cutter of the drilling device is used as it is as the flow path, the flow path of the structure is affected by the rotational cutting force or vibration of the cylindrical cutter during drilling. When a crack or the like is generated on the inner peripheral surface, there is an inconvenience that the fluid leaks to the outer surface side of the structure through the crack or the like.
Furthermore, when a part of the reinforcing bar arranged in the concrete structure is located on the drilling progress path of the cylindrical cutter, the cut end face of the cut reinforcing bar is exposed in the flow path, so that the cut reinforcing bar is exposed. There is a disadvantage that corrosion progresses from the cut end face due to contact with the fluid.

In view of this situation, a main object of the present invention is to suppress fluid leakage due to cracks on the inner peripheral surface of the flow path due to rotational cutting force and vibration during drilling, and corrosion progress from the cut end face of the cut reinforcing bar. It is an object of the present invention to provide a flow path coating treatment method for a concrete structure capable of efficiently covering the inner peripheral surface of the flow path for that purpose, and a covering cylinder used therein.

The first characteristic configuration according to the present invention is a flow path covering treatment method for a concrete structure in which the inner peripheral surface of the flow path formed through the concrete structure by a drilling device is covered in a continuous flow state. hand,
A mounting step of mounting a covering cylinder capable of covering the inner peripheral surface of the flow path to an insertion device mounted on the outer surface side of the structure while facing the flow path.
An insertion step of inserting the covering cylinder of the insertion device into the flow path in a continuous flow state, and
A detachment control step that regulates the detachment movement of the coated cylinder inserted into the flow path by the detachment regulating means, and
A sealing process step of sealing the set sealing area between the outer peripheral surface of the inserted covering cylinder and the inner peripheral surface of the flow path by a sealing means, and
The removal process for removing the insertion device and
And
The sealing means is provided with a plurality of sealing materials arranged in a pressure contact state between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path as the coated cylinder is inserted in the insertion step. It is composed of a filler injected into the sealing region between the outer peripheral surface of the covering cylinder sealed with the sealing material and the inner peripheral surface of the flow path, and the detachment regulating means is the sealing means of the sealing means. It is characterized in that it is composed of the sealing material and the filling material.

According to the above configuration, in the mounting step after drilling by the drilling device, the covering cylinder is mounted on the insertion device replaced with the drilling device, and in the inserting step, the covering cylinder is flowed in a continuous flow state by the inserting device. Insert it in the road. With this inserted covering cylinder, the inner peripheral surface of the flow path can be substantially covered in an unsealed state. Next, in the sealing treatment step, the set sealing region in the annular space having a small radial width between the outer peripheral surface of the inserted covering cylinder and the inner peripheral surface of the flow path is sealed. Due to this sealing process, cracks or the like are generated on the inner peripheral surface of the flow path of the structure, or even if the reinforcing bars in the structure are cut and exposed on the inner peripheral surface of the flow path of the structure, the cracks occur. It is possible to suppress fluid leakage due to such factors and corrosion of the cut end face of the reinforcing bar.

Therefore, it is possible to suppress fluid leakage due to cracks on the inner peripheral surface of the flow path due to rotational cutting force and vibration during drilling, and corrosion progress from the cut end face of the cut reinforcing bar. Moreover, since the inner peripheral surface of the flow path can be substantially covered in an unsealed state simply by inserting the coated cylinder into the flow path, the space between the outer peripheral surface of the coated tube and the inner peripheral surface of the flow path can be covered. It is only necessary to seal the set sealing area in the annular space having a small radial width of the above. Therefore, the coating treatment of the inner peripheral surface of the flow path can be efficiently performed.

According to the above configuration, the moving force to the detachment side due to the fluid pressure acts on the coated cylinder inserted into the flow path of the structure, but it is inserted and arranged in the flow path by executing the detachment regulation step. The detachment movement of the covering cylinder can be reliably regulated by the detachment regulating means.
Therefore, since the coated cylinder can be inserted and maintained in the flow path, the set sealing region between the outer peripheral surface of the inserted coated cylinder and the inner peripheral surface of the flow path can be reliably sealed. ..
Further, according to the above configuration, a plurality of sealing materials that are pressure-welded between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path as the coated cylinder is inserted in the insertion step, and the plurality of seals. With the filler injected into the sealing region sealed with the material, the set sealing region between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path can be more appropriately sealed. Moreover, the detachment regulating means can be configured more advantageously in terms of structure and cost by utilizing the plurality of sealing materials and fillers of the sealing means.

Before Symbol sealing means, with the insertion of the coating cylinder in said inserting step, consists sealing member disposed in a pressure contact state between the outer peripheral surface and the inner peripheral surface of the flow path of the coating cylinder Therefore, it is preferable that the detachment controlling means is composed of the sealing material of the sealing means.

According to the above configuration, the sealing material of the sealing means is pressure-welded between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path as the coated cylinder is inserted in the insertion step, and the outer circumference of the coated cylinder is pressed. The set sealing area between the surface and the inner peripheral surface of the flow path can be appropriately sealed. Moreover, the frictional resistance of the sealing material press-fitted between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path can suppress the detachment movement of the coated cylinder inserted in the flow path.
Therefore, the sealing material of the sealing means can be utilized to advantageously configure the detachment regulating means in terms of structure and cost.

The second characteristic configuration according to the present invention is a flow path covering treatment method for a concrete structure in which the inner peripheral surface of the flow path formed through the concrete structure by a drilling device is covered in a continuous flow state. hand,
A mounting step of mounting a covering cylinder capable of covering the inner peripheral surface of the flow path to an insertion device mounted on the outer surface side of the structure while facing the flow path.
An insertion step of inserting the covering cylinder of the insertion device into the flow path in a continuous flow state, and
A detachment control step that regulates the detachment movement of the coated cylinder inserted into the flow path by the detachment regulating means, and
A sealing process step of sealing the set sealing area between the outer peripheral surface of the inserted covering cylinder and the inner peripheral surface of the flow path by a sealing means, and
The removal process for removing the insertion device and
And
The insertion device is detachably attached to the outer surface of the structure via a short pipe and a sluice valve, and the disengagement regulating means is an engaging portion provided on the coated cylinder and an inner peripheral surface of the short pipe. It is composed of an engaging means provided with an engaged portion provided in the above, and the engaged portion and the engaged portion are formed in a flow path axial direction by a rotation operation of the covering cylinder with respect to the short pipe. It is a point that it is freely switchable between a disengagement restricting state in which the covering cylinder is engaged from the above and restricts the disengagement movement of the covering cylinder, and an disengagement state in which the relative movement in the flow path axial direction is permitted.

According to the above configuration, when the coated cylinder is inserted into the flow path of the structure by the insertion device, the relative positions of the short pipe and the coated cylinder in the rotation direction are covered with respect to the engaged portion of the short pipe. By setting the disengagement state to allow the passage movement of the engaging part of the cylinder in the flow path axial direction, the insertion operation of the coated cylinder into the flow path interferes with the engaged part of the short pipe. It can be done reliably and smoothly without being done.
Then, when the engaging portion of the covering cylinder passes through the engaged portion of the short tube and is inserted into the flow path, the covering cylinder is rotated with respect to the short tube to release from the disengaged state. By changing to the regulated state, when the moving force in the disengagement direction due to the fluid pressure acts on the coated cylinder inserted in the flow path, the engaging portion of the covering cylinder with respect to the engaged portion of the short pipe It can be engaged from the direction of the flow path axis to reliably prevent the covering cylinder from moving away.

Therefore, with a simple modification of providing an engaging portion on the coated cylinder and providing an engaged portion on the inner peripheral surface of the short tube, the operation of inserting the coated cylinder into the flow path can be performed reliably and smoothly. However, the detachment movement of the covering cylinder can be reliably prevented.

The third characteristic configuration according to the present invention is that the engaged portion of the engaging means is in sliding contact with the outer peripheral surface of the coated cylinder, and the coated cylinder is concentric or substantially concentric with respect to the flow path. The point is that it is composed of insertion guide protrusions that guide the insertion in the state.

According to the above configuration, when the coated cylinder is inserted into the flow path by the insertion device, the coated cylinder flows while the load of the coated cylinder is supported by the insertion guide protrusions provided on the inner peripheral surface of the short tube. It is possible to smoothly insert and guide the road in a concentric or substantially concentric state. Moreover, since the engaged portion of the engaging means can be formed by the insertion guide protrusion for this purpose, the disengagement restricting means can be configured more advantageously in terms of structure and cost.

The fourth characteristic configuration according to the present invention is that the flange contact portion where the connecting flange of the short pipe abuts from the flow path axial direction is smoothed at the opening peripheral edge of the flow path on the outer surface of the structure. After that, the connecting flange of the short pipe is fixed to the flange contact portion with a bolt in a state where an elastic sealing material is interposed between the flange contact portion and the connecting flange of the short pipe. ..

In the conventional short pipe mounting process, the outer surface of the structure is welded to expose a part of the internal reinforcing bars, and a large number of connections are made at multiple locations in the axial and circumferential directions of the outer peripheral surface of the short pipe. A short pipe fixing work process in which one end of a reinforcing bar is welded and the other end of a large number of connecting reinforcing bars is welded to an exposed reinforcing bar on the structure side, and a waterproof mortar application work process in which a waterproof mortar is applied to a suspended portion on the outer surface of the structure. Is being executed. Therefore, in the conventional short pipe attaching process, a lot of time and effort is required for each of the hanging work process, the short pipe fixing work process, and the waterproof mortar coating work process.

However, according to the above configuration of the present invention, the flange contact portion where the connecting flange of the short pipe abuts from the flow path axis direction is smoothed at the opening peripheral edge of the flow path on the outer surface of the concrete structure. Therefore, it is possible to correct the unevenness of the flange contact portion on the outer surface of the structure. Therefore, a simple elastic sealing material can also be used for waterproofing the space between the flange contact portion on the outer surface of the structure and the connecting flange of the short pipe.
Therefore, it is only necessary to bolt the connecting flange of the short pipe to the smoothed flange contact portion of the structure with an elastic sealing material interposed between it, and the short pipe mounting work can be performed efficiently. It can be carried out.

The fifth feature configuration according to the present invention is the covering cylinder used in the flow path coating treatment method for the concrete structure according to any one of the above-mentioned first to fourth feature configurations. At one end of the coated cylinder, a flange portion that can come into contact with the opening peripheral edge of the flow path on the outer surface of the structure is formed, and on the outer peripheral surface of the coated cylinder, the flow path of the flow path is formed. The point is that a plurality of sealing materials of the sealing means for sealing between the inner peripheral surface and the inner peripheral surface are provided.

According to the above configuration, when the coated cylinder is inserted into the flow path of the structure by the insertion device, the flange portion formed at one end of the coated cylinder is the opening peripheral edge of the flow path on the outer surface of the structure. It is only necessary to insert it to the position where it comes into contact with the body, and the operation of inserting the covering cylinder can be simplified. Moreover, when the coated cylinder is inserted into the flow path, a plurality of sealing materials provided on the outer peripheral surface of the coated cylinder set and seal the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path. The area can be properly sealed.

The sixth characteristic configuration according to the present invention is that the length from the tip end to the flange portion on the outer peripheral surface of the coated cylinder is the same as or larger than the axial length of the flow path. ..

According to the above configuration, when the length from the tip to the flange on the outer peripheral surface of the coated cylinder is the same as the axial length of the flow path, the coated cylinder inserted into the flow path. However, even if the fluid pressure moves a little to the detached side, the set sealing area on the inner peripheral surface of the flow path can be maintained to be sealed substantially properly.
Further, when the length from the tip to the flange on the outer peripheral surface of the covering cylinder is larger than the axial length of the flow path, the covering cylinder inserted in the flow path is fluid pressure. Even if it moves slightly to the detached side, the set sealing area on the inner peripheral surface of the flow path can be reliably maintained and sealed.

Partial cutout side view which shows the mounting process of the flow path coating treatment method of the concrete structure of 1st Embodiment of this invention. Enlarged side sectional view of the insertion device Section III-III sectional view of FIG. 1 in the disengaged state. Partial notch side view showing the mounting process FIG. 4 is a cross-sectional view taken along the line VV in FIG. 4 in a withdrawal restricted state. Partial notch side view when the insertion device is returned to the initial position and moved Enlarged side cross-sectional view when the coated cylinder is inserted into the flow path Enlarged side sectional view when the covering cylinder is detached and moved The flow path covering treatment method of the concrete structure of the 2nd Embodiment of this invention is shown, and the side view of a part cutout when the flow path blocking jig is attached to the insertion apparatus. Partial notch side view when the flow path blocking jig of the insertion device is inserted at the flow path blocking position inside the covering cylinder. Enlarged side sectional view when filling material is injected Enlarged side sectional view when filling material injection is completed Partial notch enlarged side sectional view showing a third embodiment of the present invention

[First Embodiment]
1 to 8 show a flow path covering treatment method for a concrete structure and a first embodiment of a covering cylinder 4 used therefor. In this flow path covering treatment method, a perforation device (not shown) is formed through the concrete wall W of the reinforced concrete reservoir, which is an example of the concrete structure, below the water surface level of the reservoir. The inner peripheral surface 1a of the flow path 1 is coated in a continuous water state (continuous flow state).
In the above-mentioned flow path covering treatment method, the short pipe (flange short pipe) 2 fixed to the opening peripheral edge of the flow path 1 on the outer surface Wa of the concrete wall W is connected to the connecting flange 2B on the downstream side of the short pipe 2. A state in which the sluice valve 3 to be formed, the cylindrical coated cylinder 4 capable of covering the inner peripheral surface 1a of the flow path 1, and the coated cylinder 4 can be detachably attached and face the flow path 1. A set sealing area between the insertion device 5 connected to the sluice valve 3 and the outer peripheral surface 4a of the covering cylinder 4 inserted into the flow path 1 by the insertion device 5 and the inner peripheral surface 1a of the flow path 1. A sealing means 6 for sealing L4 and a detaching regulating means 7 for restricting the detaching movement of the covering cylinder 4 inserted and arranged in the flow path 1 are used.

The short pipe 2 and the sluice valve 3 were used during the drilling operation by the drilling device, and are also used as they are in the flow path coating treatment method. Among them, the connecting flange 2A on the upstream side of the short pipe 2 is fixed to the outer surface Wa of the concrete wall W in a watertight state by a plurality of bolts 10 and nuts 11, as shown in FIGS. 7 and 8. Further, the connecting flange 2B on the downstream side of the short pipe 2 and the connecting flange 3A on the upstream side of the sluice valve 3 are fixedly connected by bolts 15 and nuts 16 in a watertight state.

As shown in FIGS. 7 and 8, at least the flange contact portion of the outer surface Wa of the concrete wall W with which the connecting flange 2A on the upstream side of the short pipe 2 abuts is smoothed by polishing, putty filling, substrate adjustment, or the like. The smoothing treatment layer 12 is formed. In the present embodiment, the range of the smoothing layer 12 is set to a range extending radially outward from the opening edge of the flow path 1 to the connecting flange 2A of the short pipe 2.
Then, between the smoothed layer 12 of the smoothed concrete wall W and the connecting flange 2A of the short pipe 2, an annular elastic sealing material (rubber) mounted in the seal mounting groove on the contact surface side of the connecting flange 2A. (Ring, etc.) 13 is watertightly sealed.
Chemical anchor bolts are used as the bolts 10 for fixing the connecting flange 2A of the short pipe 2, and the chemical anchor bolts are attached to the bolt mounting holes 14 formed by a drill at the flange fixing portion of the concrete wall W with a chemical reaction type adhesive. It is fixed.

Further, as shown in FIGS. 1 and 5, two locations in the circumferential direction of the lower half of the inner peripheral surface of the short tube 2 are the outer peripheral surface of the cylindrical cutter of the drilling device or the outer peripheral surface 4a side of the covering cylinder 4. First insertion along the flow path axial direction that guides the insertion of the cylindrical cutter or the covering cylinder 4 in a concentric or substantially concentric state with respect to the drilling center of the concrete wall W or the center of the flow path 1. The guide protrusion 20 is fixed.
One end of the first insertion guide protrusion 20 is arranged at a position as close as possible to the upstream end of the short pipe 2, and the other end of the first insertion guide protrusion 20 enters the upstream portion of the sluice valve 3. It is placed in a protruding position.
Further, at two locations in the circumferential direction of the upper half of the inner peripheral surface of the short tube 2, short ridges 21 along the flow path axial direction, one end of which is located at the same position as one end of the first insertion guide protrusion 20, are provided. It is stuck. With the one end 21a of the ridge 21 and the one end 20a of the first insertion guide protrusion 20, the detachment regulating means 7 described later, which regulates the detachment movement of the covering cylinder 4 inserted into the flow path 1 by a certain amount or more. As an example, one engaged portion 7B of the engaging means is configured.

As shown in FIGS. 1 to 3, the covering cylinder 4 includes a metal covering cylinder 4A having an outer diameter smaller than the inner diameter of the flow path 1 and being formed in a cylindrical shape and having excellent corrosion resistance, and a concrete wall W. It is composed of a flange portion 4B integrally formed at one end of a covering cylinder portion 4A in a state where it can abut against the opening peripheral edge portion of the flow path 1 on the outer surface Wa of the above from the direction of the flow path axis.
As shown in FIGS. 1 and 2, the cylinder length L1 from the tip end to the flange portion 4B on the outer peripheral surface 4a of the coated cylinder 4 is configured to be the same as the axial length L2 of the flow path 1, and the coated cylinder is formed. An annular space between the inner peripheral surface 1a of the flow path 1 and the outer peripheral surface 4a of the covering cylinder 4 is sealed at two locations on the outer peripheral surface 4a of the body 4 in the flow path axial direction by the constituent members of the sealing means 6. An annular sealing material (O-ring, etc.) 6a, 6b is provided.

Then, as shown in FIG. 7, the attachment interval L3 of both sealing materials 6a and 6b in the flow path axial direction is a set sealing region L4 including the reinforcing bar arrangement region of the reinforcing bar 19 in the concrete wall W in the flow path axial direction. It is configured at greater intervals than. Therefore, as shown in FIG. 8, even if the covering cylinder 4 moves to the detaching side within the accommodation range of the detaching regulating means 7 due to water pressure (fluid pressure), at least the set sealing region on the inner peripheral surface 1a of the flow path 1 is set. L4 can be reliably kept sealed.

Further, as shown in FIGS. 3 and 5, the flange portion 4B of the coated tubular body 4 has a recess 4b through which both first insertion guide protrusions 20 and both ridges 21 of the short pipe 2 can pass from the flow path axial direction. Is formed. The intermediate flange portion 4c of the flange portion 4B located between the recesses 4b adjacent to each other in the circumferential direction is an engaged portion formed by one end portion 21a of the ridge 21 and one end portion 20a of the first insertion guide protrusion 20. It is configured in the other engaging portion 7A of the engaging means that prevents the covering cylinder 4 inserted into the flow path 1 from moving away from the covering cylinder 4 by engaging with the 7B from the axial direction of the flow path. There is.
Then, the engaging portion 7A and the engaged portion 7B of the engaging means are engaged from the flow path axial direction by the rotation operation of the covering cylinder 4 with respect to the short pipe 2, and the covering cylinder 4 with respect to the short pipe 2 is engaged. It is configured to be freely switchable between a detachment restricting state that prevents the detachment movement of the short tube 2 and an engagement disengagement state that allows the passage movement of the covering cylinder 4 with respect to the short tube 2 in the flow path axial direction.

As shown in FIGS. 1 and 2, the insertion device 5 has a tubular body mounting portion 30 that detachably holds the coated tubular body 4 in an exterior state, and the tubular body mounting portion 30 in the flow path 1 of the concrete wall W. The insertion operation part 40 and the cylinder mounting part 30 to be inserted into the sluice valve 3 can be stored together with the coated cylinder 4, and are fixedly connected to the connecting flange 3B on the downstream side of the sluice valve 3 with bolts 15 and nuts 16 in a watertight state. It is composed of a working case 50 provided with a connecting flange 50A to be formed.

As shown in FIG. 2, the cylinder mounting portion 30 has a mounting cylinder 31 having a diameter smaller than the inner diameter of the coated cylinder 4 and a length smaller than the length of the coated cylinder 4 in the flow path axial direction. The extruded member 32 that is slidably fitted to the base end portion of the mounting cylinder 31 in the direction of the flow path axis is provided as a main configuration.
The extruded member 32 is slidably fitted to the pressing flange portion 32A that abuts on the flange portion 4B of the coated tubular body 4 from the flow path axial direction and the small diameter portion 31a formed on the bottom plate 31A of the mounting tubular body 31. A fitting cylinder portion 32B is provided.
An annular support protrusion 31B is integrally formed on the tip end side portion of the outer peripheral surface of the mounting cylinder 31 to contact-support the tip end side portion of the inner peripheral surface of the covering cylinder 4 from the radial direction, and the small diameter portion 31a of the mounting cylinder 31 is formed. Between the annular stepped surface of the above and the tip surface of the fitting cylinder portion 32B of the extrusion member 32, the portion on the base end side of the inner peripheral surface of the coated tubular body 4 is pressure-welded and supported from the radial direction in a radial outward direction. An annular rubber elastic body 33 that is elastically bulged and deformable is provided on the side.

Then, when the expansion nut 44 of the insertion operation unit 40 is rotated to the expansion side, the elastic body 33 is bulged and deformed radially outward as the mounting cylinder 31 and the extrusion member 32 move closer to each other, and the covering cylinder It is in a holding state in which the base end side portion of the inner peripheral surface of the body 4 is supported in a stretched state. On the contrary, when the expansion nut 44 of the insertion operation portion 40 is rotated to the contraction side, the elastic body 33 contracts inward in the radial direction due to the elastic restoring force as the mounting cylinder 31 and the extrusion member 32 move apart. , The holding release state is set to be smaller than the inner diameter of the covering cylinder 4.

As shown in FIGS. 1 and 2, the insertion operation unit 40 connects the tubular body mounting portion 30 in the work case 50 to the inside of the flow path 1 of the concrete wall W via the insides of the sluice valve 3 and the short pipe 2. It is configured to have an inner / outer double shaft structure of an outer shaft 41 and an inner shaft 42 having a length that can be fed into the concrete. The outer shaft 41 is slidably and slidably supported by the bottom plate 50B of the work case 50 in a watertight state, and the first screw shaft portion 41a on the tip end side of the outer shaft 41 is the extruded member 32 of the tubular body mounting portion 30. It is screwed and connected to the connecting cylinder portion 32C. On the other hand, the first screw shaft portion 42a on the tip end side of the inner shaft 42 is screwed and connected to the bottom plate 31A of the mounting cylinder 31 of the cylinder mounting portion 30.
As shown in FIG. 2, the second screw shaft portion 42b formed on the base end portion on the operation side of the inner shaft 42 has the end surface of the base end portion of the outer shaft 41 from the axial direction via the thrust bearing 43. A pressable expansion nut 44 is screwed in.
Further, the outer shaft 41 is composed of a plurality of split outer shafts that can be spliced and connected, and the inner shaft 42 is also composed of a plurality of split inner shafts that can be spliced and connected.

As shown in FIGS. 1 and 3, the lower half of the inner peripheral surface of the working case 50 is located on the outer peripheral surface of the cylindrical cutter of the drilling device or on the outer peripheral surface 4a side of the covering cylinder 4. A second insertion guide along the flow path axial direction that slides and guides the cylindrical cutter or the covering cylinder 4 in a concentric or substantially concentric state with respect to the drilling center of the concrete wall W or the center of the flow path 1. The protrusion 51 is fixed.

Next, a first embodiment of the flow path covering treatment method for a concrete structure using equipment such as the covering cylinder 4 and the insertion device 5 configured as described above will be described.
[1] Regarding the mounting process
1 to 3 show the inner peripheral surface of the flow path 1 in the insertion device 5 attached to the outer surface Wa side of the concrete wall W in a state of facing the flow path 1 formed through the concrete wall W by the drilling device. The mounting process for mounting the coated cylinder 4 capable of covering the concrete is shown.
In this mounting step, as shown in FIG. 1, for work of the insertion device 5 in which the covering cylinder 4 is mounted on the connecting flange 3B on the downstream side of the sluice valve 3 in the closed state in which the drilling device is removed. The connecting flange 50A of the case 50 is fixedly connected in a watertight state.
As shown in FIG. 2, the coated tubular body 4 is exteriorized over the mounting tubular body 31 and the extrusion member 32 of the tubular body mounting portion 30 of the insertion device 5. In this exterior state, the flange portion 4B of the coated tubular body 4 is in contact with the pressing flange portion 32A of the extrusion member 32 from the direction of the flow path axis.

Further, in this mounting step, the expansion nut 44 of the insertion operation unit 40 is rotationally operated to the expansion side, and the elastic body 33 is radially moved by the proximity movement of the mounting cylinder 31 and the extrusion member 32 accompanying this rotation operation. It has been changed to a state where it bulges and deforms to the outside. Therefore, the base end side portion of the inner peripheral surface of the coated tubular body 4 is pressure-welded and supported by the elastic body 33 that has been bulged and deformed in a tensioned state from the radial direction, and the distal end side portion of the inner peripheral surface of the coated tubular body 4 is supported. It is received and supported from the radial direction by an annular support protrusion 31B integrally formed on the tip end side portion of the outer peripheral surface of the mounting cylinder 31. As a result, the coated tubular body 4 can be reliably and satisfactorily held in a predetermined mounting posture at two points, the elastic body 33 and the annular support projection 31B.

As shown in FIGS. 1 and 2, the inner peripheral surface 1a of the flow path 1 and the covering cylinder 4 are the constituent members of the sealing means 6 at two locations on the outer peripheral surface 4a of the covering cylinder 4 in the flow path axial direction. An annular sealing material (O-ring or the like) 6a, 6b for sealing the annular space between the outer peripheral surface 4a and the outer peripheral surface 4a is provided. As shown in FIGS. 7 and 8, the mounting interval L3 of both the sealing materials 6a and 6b in the flow path axis direction is set and sealed including the reinforcing bar arrangement region of the reinforcing bar 19 in the concrete wall W in the flow path axis direction. It is configured at intervals larger than the region L4.
Further, both the sealing materials 6a and 6b of the covering cylinder 4 slide in the flow path axis direction with the second insertion guide protrusion 51 fixed at two points in the circumferential direction of the lower half portion on the inner peripheral surface of the work case 50. They are in free contact.

Both second insertion guide protrusions 51 on the inner peripheral surface of the work case 50 and both first insertion guide protrusions 20 fixed at two points in the circumferential direction of the lower half on the inner peripheral surface of the short pipe 2 are the flow path axes. It constitutes two guide rails that are linear in the direction.
Further, as shown in FIGS. 1 and 3, the recesses 4b formed at four points in the circumferential direction of the flange portion 4B of the coated tubular body 4 are the second insertion guide protrusions 51 and the short pipe 2 of the work case 50. The first insertion guide protrusions 20 and the short pipe 2 are arranged in the same phase facing each other in the flow path axial direction with respect to the ridges 21 fixed at two points in the circumferential direction of the upper half of the inner peripheral surface of the short pipe 2. ..
Therefore, as shown in FIG. 3, the recess 4b of the flange portion 4B of the coated tubular body 4 has both the second insertion guide protrusions 51 of the working case 50 and the first insertion guide protrusions 20 and the ridges 21 of the short pipe 2. It is in a state where it can pass and move along.

[2] Regarding the insertion process and the sealing process
FIG. 4 shows an insertion step of inserting the covering cylinder 4 of the inserting device 5 into the flow path 1 of the concrete wall W in a water-free state, and the outer peripheral surface 4a of the inserted covering cylinder 4 and the inside of the flow path 1. The sealing process step of sealing the set sealing area L4 with the peripheral surface 1a by the sealing means 6 is shown.
In the insertion step, the valve body 3C of the sluice valve 3 is opened and the insertion operation unit 40 of the insertion device 5 is pushed in. At the time of this pushing operation, both the sealing materials 6a and 6b on the outer peripheral surface 4a side of the covering tubular body 4 mounted on the tubular body mounting portion 30 of the insertion device 5 are connected to both the second insertion guide protrusions 51 of the work case 50. Both first insertion guide protrusions 20 and ridges 21 of the short pipe 2 are guided by sliding contact.

As shown in FIG. 4, the maximum insertion state is a state in which the flange portion 4B of the covering cylinder 4 is in contact with the opening peripheral edge portion of the flow path 1 on the outer surface Wa of the concrete wall W from the direction of the flow path axis. As the coated tubular body 4 is inserted into the flow path 1, the diameters of both sealing materials 6a and 6b on the outer peripheral surface 4a side of the coated tubular body 4 are reduced due to contact with the inner peripheral surface 1a of the flow path 1. It enters the flow path 1 while being compressed to the side. Therefore, both the sealing materials 6a and 6b on the outer peripheral surface 4a side of the covering cylinder 4 are changed to a sealed state in which they are pressure-contacted with the inner peripheral surface 1a of the flow path 1, and the sealed state is maintained.

[3] Regarding the withdrawal regulation process
4 and 5 show a detachment regulation step in which the detachment regulating means 7 regulates the detachment movement of the covering cylinder 4 inserted in the flow path 1.
The withdrawal control means 7 of this withdrawal control process is composed of two components. One of the components is composed of both sealing materials 6a and 6b of the sealing means 6. In this case, due to the frictional resistance of both sealing materials 6a and 6b press-fitted between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1, the covering cylinder 4 is moved away from the set insertion region. Can be suppressed.

The other component of the disengagement regulating means 7 is composed of an engaging portion 7A provided on the covering tubular body 4 and an engaging portion 7B provided on the inner peripheral surface of the short tube 2. ing. The engaging portion 7A and the engaged portion 7B of the engaging means are engaged from the flow path axial direction by the rotation operation of the coated tubular body 4 with respect to the short pipe 2, and the detachment movement of the coated tubular body 4 is restricted. It is configured to be freely switchable between a disengagement restricted state and a disengaged state that allows relative movement in the direction of the flow path axis.
In the present embodiment, the engaging portion 7A is composed of an intermediate flange portion 4c located between the recesses 4b adjacent to each other in the circumferential direction in the flange portion 4B of the covering tubular body 4. On the other hand, the engaged portion 7B is composed of one end portion 21a of the ridge 21 and one end portion 20a of the first insertion guide protrusion 20.

As described in the above-mentioned insertion step, when the covering cylinder 4 is inserted into the flow path 1 by the insertion device 5, as shown in FIG. 3, the short tube 2 and the covering cylinder 4 are in the rotation direction. Set the relative position to the disengaged state. That is, the engaging portion 7A on the covering cylinder 4 side is formed with respect to the one end portion 21a of the ridge 21 and the one end portion 20a of the first insertion guide protrusion 20 forming the engaged portion 7B on the short tube 2 side. By setting the intermediate flange portion 4c of the flange portion 4B to the disengaged state in which the intermediate flange portion 4c does not engage in the flow path axial direction, the operation of inserting the coated tubular body 4 into the flow path 1 can be performed by the engaged portion of the short pipe 2. It can be performed reliably and smoothly without being disturbed by 7B.

Then, in the disengagement regulation step, as shown in FIG. 5, when the engaging portion 7A on the covering cylinder 4 side passes through the engaged portion 7B on the short tube 2 side and is inserted into the flow path 1. In other words, when the flange portion 4B of the covering tubular body 4 comes into contact with the opening peripheral edge portion of the flow path 1 on the outer surface Wa of the concrete wall W from the flow path axis direction, the insertion operation portion 40 of the insertion device 5 is inserted. The rotation operation is performed to change the relative position of the short tube 2 and the covering cylinder 4 in the rotation direction from the disengaged state to the disengagement restricted state.
Therefore, as shown in FIG. 8, even if the coated tubular body 4 inserted in the flow path 1 is detached and moved due to water pressure (fluid pressure), the ridge 21 constituting the engaged portion 7B on the short tube 2 side is formed. The intermediate flange portion 4c of the flange portion 4B constituting the engaging portion 7A on the covering cylinder 4 side is engaged with the one end portion 21a of the above and the one end portion 20a of the first insertion guide protrusion 20 from the flow path axis direction. The detachment movement of the covering cylinder 4 can be reliably prevented.

Moreover, as shown in FIG. 7, the attachment interval L3 of both sealing materials 6a and 6b in the flow path axial direction is the set sealing region L4 including the reinforcing bar arrangement region of the reinforcing bar 19 in the concrete wall W in the flow path axial direction. As shown in FIG. 8, even if the covering cylinder 4 moves to the detachment side within the accommodation range of the detachment regulating means 7 due to water pressure (fluid pressure), the flow path 1 At least the set sealing region L4 on the inner peripheral surface 1a of the above can be reliably kept sealed.

[4] About the removal process
FIG. 6 shows a removal step of removing the insertion device 5.
In this removal step, as shown in FIG. 4, the expansion nut 44 of the insertion operation unit 40 is contracted after the detachment regulation step in which the covering cylinder 4 is inserted and held in the flow path 1 of the concrete wall W in a sealed state. Return to the side and rotate. By this return rotation operation, the elastic body 33 contracts inward in the radial direction due to the elastic restoring force as the mounting cylinder 31 and the extrusion member 32 move apart, and the holding is smaller than the inner diameter of the covering cylinder 4. It will be released.
Therefore, even if the insertion operation unit 40 of the insertion device 5 is pulled out, the covering cylinder 4 remains inserted and held in the flow path 1 of the concrete wall W, and the cylinder of the insertion device 5 is inserted into the covering cylinder 4. Only the body mounting portion 30 is extracted.

Then, as shown in FIG. 6, when the tubular body mounting portion 30 of the insertion device 5 is returned and moved into the work case 50, the valve body 3C of the sluice valve 3 is closed and the downstream side of the sluice valve 3 is operated. The working case 50 of the insertion device 5 is removed from the connecting flange 3B of the above.

[Second Embodiment]
9 to 12 show a second embodiment of the flow path covering treatment method for a concrete structure.
In the flow path coating treatment method of the second embodiment, after executing the mounting step, the insertion step, the sealing treatment step, the detachment regulation step, and the removal step of the first embodiment described above, the upstream side in the covering cylinder 4 The flow path blocking step of temporarily stopping the flow path blocking position with the flow path blocking jig 60, and the outer peripheral surface 4a of the covering cylinder 4 sealed with both sealing materials 6a and 6b of the sealing means 6 and the inside of the flow path 1. The filler injection step of injecting cement milk 76, which is an example of the solidifying filler, into the sealed region between the peripheral surface 1a and the filling device 70, and the jig removing step of removing the flow path blocking jig 60 are performed. Execute.

As shown in FIG. 9, the flow path blocking jig 60 is detachably attached to the tip of the insertion operation portion 40 of the insertion device 5, and the flow path blocking jig 60 is attached to the flow path of the concrete wall W. In the insertion operation into the covering cylinder 4 mounted on 1, the insertion operation unit 40 of the insertion device 5 is pushed into the work case 50.
The flow path blocking jig 60 includes a first pressing plate 60A that is detachably connected to the tip of the outer shaft 41, a second pressing plate 60B that is detachably connected to the tip of the inner shaft 42, and a second. It is composed of a rubber flow path blocking body 60C that elastically bulges and deforms outward in the radial direction as the first pressing plate 60A moves closer to the pressing plate 60B to block the flow path 1.

As shown in FIG. 11, the filling device 70 includes a pumping unit 71 that pumps cement milk 76 formed by mixing cement-based materials and water, and a covering cylinder 4 to which a hose 72 of the pumping unit 71 is connected. The injection port 73 on the lower side, the discharge port 74 on the upper side of the covering cylinder 4 from which the cement milk 76 filled in the sealed area flows out, and the injection port 73 and the discharge port 74 after filling the cement milk 76 are closed in a sealed state. It is composed of a plug 75 to be cemented.

As shown in FIG. 11, as the coated tubular body 4, the inner peripheral surface 1a of the flow path 1 and the coated tubular body 4 are the constituent members of the sealing means 6 at two locations on the outer peripheral surface 4a of the covering cylinder 4 in the direction of the flow path axis. An annular sealing material 6a, 6b for sealing at least the set sealing region L4 in the annular space between the outer peripheral surface 4a and the sealing material 6a, 6b is provided, and the injection port 73 and the exhaust are provided between the sealing materials 6a, 6b in the covering cylinder portion 4A. The one in which the outlet 74 is formed is used.

Next, the flow path blocking step and the filler injection step of the flow path covering treatment method of the second embodiment using the flow path blocking jig 60 and the filling device 70 configured as described above will be described.
[5] Regarding the flow path blocking process
As shown in FIG. 9, the connecting flange 50A of the work case 50 in which the flow path blocking jig 60 and the insertion operation unit 40 are mounted on the connecting flange 3B on the downstream side of the sluice valve 3 in the closed valve state is watertight. Fixed connection in the state.

Next, as shown in FIG. 10, the valve body 3C of the sluice valve 3 is opened, the insertion operation unit 40 is pushed in, and the flow path blocking jig 60 is placed at the flow path blocking position in the covering cylinder 4. Send to. When the expansion nut 44 of the insertion operation unit 40 is rotated to the expansion side in this state, the rubber flow path blocker 60C is moved outward in the radial direction as the first pressing plate 60A moves closer to the second pressing plate 60B. It is elastically bulged and deformed to the side, and the entire circumference of the flow path blocking body 60C is changed to a flow path blocking state in which the entire circumference of the inner peripheral surface of the covering cylinder 4 is pressure-contacted in a watertight state.
A sealing material 6a on the upstream side is arranged at a portion corresponding to the flow path blocking position of the covering cylinder 4 by the flow path blocking jig 60, and the sealing material 6a on the upstream side covers the entire circumference of the flow path blocking body 60C. The flow path blocking portion of the coated tubular body 4 that is pressure-welded in a watertight state can be firmly supported from the outside in the radial direction.

When the flow path 1 is cut off in the covering cylinder 4, as shown in FIG. 11, the outer shaft 41 of the insertion operation unit 40 and the outer shaft 41 of the insertion operation unit 40 are inserted from the first pressing plate 60A and the second pressing plate 60B of the flow path blocking jig 60. The insertion operation unit 40 is pulled out to the working case 50 side while the inner shaft 42 is separated and the flow path blocking jig 60 in the flow path blocking state is left at the flow path blocking position in the covering cylinder 4. After that, the valve body 3C of the sluice valve 3 is closed, and the working case 50 is removed from the connecting flange 3B on the downstream side of the sluice valve 3.

[6] About the filler injection process
As shown in FIG. 11, the hose 72 of the pumping section 71 for pumping the cement milk 76 was connected to the injection port 73 on the lower side of the covering cylinder 4, and was sealed with both sealing materials 6a and 6b of the sealing means 6. Cement milk 76 is filled in the sealing region between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1. The outflow of cement milk 76 from the discharge port 74 on the upper side of the covering cylinder 4 is visually confirmed, and if there is outflow of cement milk 76, it is determined that the sealed area is filled with cement milk 76, and the pumping unit 71 determines that the cement milk 76 has been filled. Stop pumping cement milk 76. After that, as shown in FIG. 12, the injection port 73 and the discharge port 74 of the covering cylinder 4 are closed by the plug 75.

Then, due to the solidification of the cement milk 76 filled in the sealed region, the inner peripheral surface 1a of the flow path 1 of the concrete wall W and the outer peripheral surface 4a of the covering cylinder 4 are integrally fixed via the cement milk 76. To.
Therefore, in the flow path coating treatment method of the second embodiment, the sealing means 6 for sealing at least the set sealing region L4 between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1 is covered. Both sealing materials 6a and 6b arranged in a pressure contact state between the outer peripheral surface 4a of the tubular body 4 and the inner peripheral surface 1a of the flow path 1 and the sealing region sealed by both sealing materials 6a and 6b are injected. It is composed of cement milk 76, which is an example of a filler.

Further, in the flow path covering treatment method of the second embodiment, the withdrawal regulating means 7 of the withdrawal regulating step is composed of three components. The first component thereof is composed of both sealing materials 6a and 6b of the sealing means 6.
The second component is composed of cement milk 76, which is an example of a filler filled in the sealed region.
The third component is composed of an engaging means including an engaging portion 7A provided on the covering cylinder 4 and an engaged portion 7B provided on the inner peripheral surface of the short tube 2. The engaging portion 7A and the engaged portion 7B of the engaging means are engaged from the flow path axial direction by the rotation operation of the coated tubular body 4 with respect to the short pipe 2, and the detachment movement of the coated tubular body 4 is restricted. It is configured to be freely switchable between a disengagement restricted state and a disengaged state that allows relative movement in the direction of the flow path axis.
As a result, the sealing region between the outer peripheral surface 4a of the coated tubular body 4 and the inner peripheral surface 1a of the flow path 1 can be more appropriately sealed, and at the same time, the plurality of sealing materials 6a and 6b of the sealing means 6 can be sealed. The cement milk 76, which is an example of the filler, the intermediate flange portion 4c between the recesses 4b in the flange portion 4B of the covering cylinder 4 constituting the engaging portion 7A of the engaging means, and the engaged portion of the engaging means. With the one end 21a of the ridge 21 and the one end 20a of the first insertion guide protrusion 20 constituting the 7B, the detachment regulating means 7 can be configured more advantageously in terms of structure and cost.

[7] Regarding the jig removal process
The connecting flange 50A of the work case 50 in which the insertion operation portion 40 is mounted is fixedly connected to the connecting flange 3B on the downstream side of the sluice valve 3 in the closed valve state in a watertight state. Next, the valve body 3C of the sluice valve 3 is opened, and the insertion operation portion 40 mounted on the work case 50 is blocked from the flow path blocking position in the covering cylinder 4. The tool 60 is pushed in, and the outer shaft 41 and the inner shaft 42 of the insertion operation unit 40 are connected to the first pressing plate 60A and the second pressing plate 60B of the flow path blocking jig 60 (see FIG. 10).

Then, when the expansion nut 44 of the insertion operation unit 40 is rotated to the reduced diameter side, the flow path blocking body 60C is elastically restored within the radial direction as the first pressing plate 60A moves away from the second pressing plate 60B. The flow path blocking body 60C is contracted and deformed to the side, and the blocking release state is changed so as to be separated from the inner peripheral surface of the covering cylinder 4.
In this state, the insertion operation unit 40 of the insertion device 5 is pulled out to move the flow path cutoff jig 60 in the cutoff release state back into the work case 50 (see FIG. 9), and then the valve of the sluice valve 3 The body 3C is closed, and the working case 50 is removed from the connecting flange 3B on the downstream side of the sluice valve 3.

Since the other configurations are the same as the configurations described in the first embodiment, the same numbers as those in the first embodiment are added to the same configuration parts, and the description thereof will be omitted.

[Third Embodiment]
FIG. 13 shows a third embodiment of the covering cylinder 4 used in the flow path covering treatment method for a concrete structure. In the third embodiment, the tubular length L1 from the tip of the outer peripheral surface 4a of the coated tubular body 4 to the flange portion 4B is larger than the axial length L2 of the flow path 1 formed through the concrete wall W. It is configured.
Then, as shown in the upper half cross-sectional view of FIG. 13, the flange portion 4B of the covering cylinder 4 is in contact with the opening peripheral edge portion of the flow path 1 on the outer surface Wa of the concrete wall W from the direction of the flow path axis. Then, the tip of the covering cylinder 4 projects from the inner surface Wb of the concrete wall W.
Further, as shown in the lower half cross section of FIG. 13, the intermediate flange portion 4c between the recesses 4b in the flange portion 4B of the covering tubular body 4 constituting the engaging portion 7A constitutes the engaging portion 7B. In a state of being in contact with one end 21a of the strip 21 and one end 20a of the first insertion guide protrusion 20, the tip of the covering cylinder 4 is located flush with or substantially flush with the inner surface Wb of the concrete wall W.
Therefore, even if the coated tubular body 4 inserted into the flow path 1 is slightly moved to the detachment side due to water pressure, the set sealing region L4 of the inner peripheral surface 1a of the flow path 1 can be reliably and maintained to be sealed.

Since the other configurations are the same as the configurations described in the first embodiment, the same numbers as those in the first embodiment are added to the same configuration parts, and the description thereof will be omitted.

[Other Embodiments]
(1) In constructing the detachment regulating means 7 for restricting the detachment movement of the covering cylinder 4 inserted into the flow path 1, in the above-described first embodiment, the covering means 6 is engaged with the sealing materials 6a and 6b. It was composed of a combination of the engaging portion 7A and the engaging portion 7B of the means. Further, in the second embodiment described above, the sealing materials 6a and 6b of the sealing means 6 and cement milk 76, which is an example of the filler, are combined with the engaging portion 7A and the engaged portion 7B of the engaging means. .. However, the configuration is not limited to this, and for example, when the water pressure acting on the covering cylinder 4 is small, it may be composed of only the sealing materials 6a and 6b of the sealing means 6.
Further, the length from the tip of the outer peripheral surface 4a of the covering cylinder 4 to the flange portion 4B is configured to be larger than the axial length of the flow path 1 formed through the concrete wall W, and the inner surface Wb of the concrete wall W is formed. The above-mentioned detachment restricting means 7 may be formed by expanding and deforming the tip portion of the coated tubular body 4 protruding from the surface so as to be in a retaining state.

(2) In the above-mentioned second embodiment, cement milk 76 is exemplified as the filler, but the filler may be a resin-based adhesive, a foamed resin that foams after filling, or the like.

(3) In each of the above-described embodiments, a pair of sealing materials 6a and 6b arranged in a pressure contact state are provided between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1, but the covering is provided. When the flange portion 4B of the tubular body 4 is in close contact with the opening peripheral edge portion of the flow path 1 on the outer surface Wa of the concrete wall W, the outer peripheral surface 4a of the coated tubular body 4 and the inner peripheral surface 1a of the flow path 1 One sealing material 6a may be arranged between the two. Of course, three or more sealing materials may be arranged between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1.

(4) In each of the above-described embodiments, the engaged portion 7B of the engaging means is fixed to two points in the circumferential direction of the lower half portion on the inner peripheral surface of the short tube 2 and the short tube. It was composed of a short ridge 21 fixed to two points in the circumferential direction of the upper half on the inner peripheral surface of 2, but the engaged portion 7B was formed by either the first insertion guide protrusion 20 or the short ridge 21. May be configured.

(5) In the above-described embodiment, the detachment regulating means 7 is provided with the position-holding means such as the sealing materials 6a and 6b for holding the position of the covering cylinder 4 inserted into the flow path 1 of the concrete wall W, and the flow path 1. Engagement between a fixing means such as cement milk 76 for fixing the covering cylinder 4 inserted in the concrete wall W to the concrete wall W and an engagement for preventing the covering cylinder 4 inserted in the flow path 1 from being detached and moved beyond a certain level. It is composed of at least one of means, but is not limited to this configuration. For example, a dedicated fixing means such as a solidifying filler 76 or a bolt for fixing the covering cylinder 4 inserted in the flow path 1 to the concrete wall W is provided, and the detaching regulating means 7 is fixed by the covering cylinder 4. The coated tubular body 4 may be specially configured for a function of holding the position of the covering cylinder 4 until it is fixed to the concrete wall W or preventing engagement of a certain amount of detachment movement.
As an example thereof, the sealing means 6 is arranged in a pressure contact state between the outer peripheral surface 4a of the covering cylinder 4 and the inner peripheral surface 1a of the flow path 1 as the covering cylinder 4 is inserted in the insertion step. Solidifying filling injected into the sealing region between the plurality of sealing materials 6a and 6b and the outer peripheral surface 4a of the covering cylinder 4 sealed with the sealing materials 6a and 6b and the inner peripheral surface 1a of the flow path 1. It is composed of the material 76, and the detachment regulating means 7 is engaged with the covering cylinder 4 inserted in the flow path 1 from the direction of the flow path axis to prevent the covering cylinder 4 from moving away from the covering cylinder 4 beyond a certain level. It is composed of engaging means.

1 Flow path 1a Inner peripheral surface 2 Short pipe 2A Connecting flange 3 Gate valve 4 Covered cylinder 4B Flange part 4a Outer peripheral surface 5 Inserting device 6 Sealing means 6a Sealing material 6b Sealing material 7 Disengagement regulating means 7A Engaging part 7B Engagement Part 10 Bolt 13 Elastic sealant 20 Insertion guide protrusion (1st insertion guide protrusion)
76 Filler (cement milk)
L1 Cylinder length L2 Axial length of flow path 1 L3 Mounting interval L4 Set sealing area W Structure (concrete wall)
Wa outer surface

Claims (6)

It is a flow path coating treatment method for concrete structures that covers the inner peripheral surface of the flow path that is formed through the concrete structure with a drilling device in a continuous flow state.
A mounting step of mounting a covering cylinder capable of covering the inner peripheral surface of the flow path to an insertion device mounted on the outer surface side of the structure while facing the flow path.
An insertion step of inserting the covering cylinder of the insertion device into the flow path in a continuous flow state, and
A detachment control step that regulates the detachment movement of the coated cylinder inserted into the flow path by the detachment regulating means, and
A sealing process step of sealing the set sealing area between the outer peripheral surface of the inserted covering cylinder and the inner peripheral surface of the flow path by a sealing means, and
The removal process for removing the insertion device and
And
The sealing means is provided with a plurality of sealing materials arranged in a pressure contact state between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path as the coated cylinder is inserted in the insertion step. It is composed of a filler injected into the sealing region between the outer peripheral surface of the covering cylinder sealed with the sealing material and the inner peripheral surface of the flow path, and the detachment regulating means is the sealing means of the sealing means. A flow path coating treatment method for a concrete structure, which comprises the sealing material and the filler. It is a flow path coating treatment method for concrete structures that covers the inner peripheral surface of the flow path that is formed through the concrete structure with a drilling device in a continuous flow state.
A mounting step of mounting a covering cylinder capable of covering the inner peripheral surface of the flow path to an insertion device mounted on the outer surface side of the structure while facing the flow path.
An insertion step of inserting the covering cylinder of the insertion device into the flow path in a continuous flow state, and
A detachment control step that regulates the detachment movement of the coated cylinder inserted into the flow path by the detachment regulating means, and
A sealing process step of sealing the set sealing area between the outer peripheral surface of the inserted covering cylinder and the inner peripheral surface of the flow path by a sealing means, and
The removal process for removing the insertion device and
And
The insertion device is detachably attached to the outer surface of the structure via a short pipe and a sluice valve, and the disengagement regulating means is an engaging portion provided on the coated cylinder and an inner peripheral surface of the short pipe. It is composed of an engaging means provided with an engaged portion provided in the above, and the engaged portion and the engaged portion are formed in a flow path axial direction by a rotation operation of the covering cylinder with respect to the short pipe. It is characterized in that it can be freely switched between a disengagement restricting state that restricts the disengagement movement of the covering cylinder by engaging with the coating cylinder and an disengagement state that allows relative movement in the flow path axial direction. Flow path covering treatment method for concrete structures. The engaged portion of the engaging means is composed of an insertion guide protrusion that slides into contact with the outer peripheral surface of the coated cylinder and guides the coated cylinder into the flow path in a concentric or substantially concentric state. The flow path covering treatment method for a concrete structure according to claim 2. The flange contact portion and the short portion are smoothed at the opening peripheral edge of the flow path on the outer surface of the structure and where the connecting flange of the short pipe abuts from the flow path axis direction. The flow of the concrete structure according to claim 2 or 3 , wherein the connecting flange of the short pipe is bolted to the flange contact portion with an elastic sealing material interposed between the connecting flange of the pipe. Road covering treatment method. The coated cylinder used in the flow path coating treatment method for the concrete structure according to any one of claims 1 to 4, wherein one end of the coated cylinder is on the outer surface of the structure. A flange portion that can be brought into contact with the opening peripheral edge portion of the flow path is formed, and a plurality of the sealing means for sealing between the outer peripheral surface of the coated cylinder and the inner peripheral surface of the flow path. A coated cylinder provided with a sealing material. The coated tubular body according to claim 5 , wherein the tubular length from the tip end to the flange portion on the outer peripheral surface of the coated tubular body is the same as or larger than the axial length of the flow path.

Images