JP5214845B2 - Gap closing device - Google Patents

Description

  The present invention relates to a gap closing device for filling a gap such as a joint between a concrete beam and a column or a joint at an intermediate portion of the beam with a solidified material such as concrete.

Conventionally, when filling this type of gap with a solidified material such as concrete or mortar, formwork is placed on the surface of columns and beams so as to surround the joints, and pipes are placed outside these formwork. After assembling and constraining the corner, the gap is filled with a caking material, and the mold is removed after a predetermined curing period.
The formwork is made of a flat plate made of wood or metal, and the one made according to the site size is used.

The technique using the flat plate-shaped form described above has the following problems.
<1> Since the molds are individually manufactured according to the on-site dimensions, they cannot be used if the on-site dimensions are different, and the diversion of the form is difficult.
<2> A lot of work is required to assemble and dismantle the formwork.
<3> As described above, since the formwork cost and the work cost increase, there is a problem that the construction cost is high.

The present invention has been made in view of the above points, and an object of the present invention is to provide a gap closing device that is excellent in on-site responsiveness and workability, and excellent in divertability.
It is another object of the present invention to provide a gap closing device that allows easy installation and removal of a mold.

In order to solve the above problem, the first invention of the present application is a gap closing device that is inserted into a gap formed between opposing faces of an existing concrete structure facing each other and filled with a consolidated material, It crushed possible into a flat shape, and folding is constituted by a tube body formed by the non-elastic material capable, provided ventilation spacer foldable over a part or the entire length of the interior of the tube body, the tube When a supply / exhaust port with a check valve function is formed in a part of the body, and a part of the tube body crushed flat is folded obliquely to form a bent part, it is positioned in the bent part. The gap closing device is characterized in that a ventilation gap is formed between the ventilation spacer and the tube body.

  According to a second invention of the present application, in the first invention, the tube body includes a cuff that is slidably mounted on the tube body, and the tube body is expanded in a state in which one and the other of the tube bodies inserted into the cuff are polymerized. The gap clogging is characterized in that it is configured such that both ends of the polymerized can be fixed with the cuff by expansion pressure.

(1) Since the gap closing device is configured by adding a tube body or cuffs to the gap body, the gap closing apparatus can be diverted as well as adjusted to a length corresponding to the circumferential length of the outline of the gap.
Furthermore, the setting of the formwork is completed only by setting the flat tube body in the gap, and the demolding is completed only by discharging the fluid of the expanded tube body.
Therefore, compared with the case where the conventional flat formwork is used, the diversion, assembly, and demoldability of the formwork can be greatly improved.
(2) Reuse of the formwork is possible, and the labor and time required for assembly and demolding of the formwork can be greatly reduced, and the overall construction cost can be reduced.
(3) By constructing the flat tube body so that it can be bent, the tube body can be formed into an arbitrary plane shape, and the caulking material leaks from the air vent and the bent portion when the caking material is filled. With this, the filling condition of the consolidated material can be confirmed.
(4) Since the tube body is set in a flat state, not only is it easy to install in a narrow gap, but also the expansion pressure of the tube body can be used for the surface contact force to the existing concrete structure and high sealing performance And the expansion pressure of the tube body can be prevented from acting as a pull-out force of the tube body.
(5) Since the air gap spacer is provided inside the tube body, a gap can be secured at the bent portion, so that uniform expansion pressure can be applied over the entire tube body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(1) Outline of Gap Closure Device FIGS. 1 to 5 show an example of a gap occlusion device 10 according to the present invention.
The gap closing device 10 includes a tube body 101 and a cuff 102. Hereinafter, each component will be described in detail.

(2) Tube body The tube body 101 having a formwork function is a cylindrical body sealed at both ends, and a supply / exhaust port 103 with a check valve function is provided in a part of the tube body 101. 103 is expanded by supplying a fluid such as gas or liquid from the outside through 103, and the check valve mechanism of the supply / discharge port 103 is opened to discharge the fluid out of the tube body 101, thereby contracting into a flat shape. Is possible.
In this example, the entire length of the tube body 101 is the contour of the gap so that the tube body 101 can close the entire circumference of the gap 4 formed between the opposing surfaces of the existing concrete structures 2 and 3 such as beams and columns. The case where it is formed longer than the entire circumference will be described.
Further, the expansion diameter of the tube body 101 is at least larger than the gap width of the gap 4, and the thickness when the tube body 101 is contracted is smaller than the gap width of the gap 4 so that the tube body 101 can be inserted into the gap 4. Is set.

  The tube body 101 is formed of a flexible material that can be crushed flat and bendable, and is more preferably formed of a non-stretchable material having excellent airtightness.

  The material of the tube body 101 may be formed of a material that does not easily adhere to the consolidated material and easily peels off. For example, a known material excellent in durability obtained by coding a resin on a woven fabric can be used. A known release material may be applied to the surface.

The tube body 101 may be formed in advance in accordance with the cross-sectional shape of the existing concrete structures 2 and 3, but is not useful.
Therefore, in the present invention, the tube body 101 having a linear shape is used, and the bent portion 104 is formed by obliquely folding a plurality of portions in the middle as shown in FIG. Added.

  In this example, a case where a rectangular closed shape is formed by bending four locations of the tube body 101 at substantially right angles is shown, but by appropriately selecting the folding angle and the folding location of the tube body 101, the contour shape of the gap is met. It becomes possible to obtain various sealing shapes.

  Further, since the tube body 101 is bent at a predetermined crossing angle at the bent portion 104, a step is generated at the upper and lower portions of the bent portion 104. When the tube body 101 is set and expanded in the gap 4, this step forms a minute gap that communicates the inside and outside of the gap 4. Through this minute gap, the inside of the gap 4 of the consolidated material is formed. In addition to functioning as an air vent from the gap 4 at the time of filling, it is also useful for checking the filling of the consolidated material.

There is a possibility that the fluid flow is blocked by bending the tube body 101.
Therefore, as shown in FIGS. 3 and 5, a ventilation spacer 105 is provided inside the tube body 101 to secure a clearance for ventilation inside the bent portion 104 where the tube body 101 is bent in a contracted state, thereby allowing fluid flow. It is formed to pass smoothly without blocking.

In addition to accommodating a separate wire such as a plastic wire that can be bent and plastically deformed, the ventilation spacer 105 is integrally formed by raising the inner peripheral surface of the tube body 101 along the length direction. It may be formed into a shape.
In addition to continuously forming the ventilation spacer 105 over the entire length of the tube body 101, the ventilation spacer 105 may be partially formed in a part of the inside of the tube body 101. In short, at least the tube body 101 is bent. The ventilation spacer 105 should just be provided over the formation range of the part 104. FIG.

(3) Cuff Cuff 102 is a restraining member for restraining the overlapping portion of tube body 101 and fixing it in a closed shape, and is slidably mounted on tube body 101.
Unlike the conventional plate-shaped formwork, the present invention does not require the entire length of the tube body 101 to be completely coincident with the entire length around the gap, and by appropriately selecting the sliding amount of the tube body 101 with respect to the cuff 102, the closed loop The total length of the frame, that is, the substantial length of the mold can be arbitrarily set.

The cuff 102 is a cylindrical body having a size capable of inserting two tubes obtained by superposing the tail end 107 of the tube body 101 and the head 106 side of the tube body 101.
The cuff 102 has flexibility, but does not have great stretchability.
By giving flexibility to the cuff 102, the cuff 102 itself receives the expansion pressure of the tube body 101 and bends to increase the adhesion to the opposing surfaces of the existing concrete structures 2 and 3, and the cuff 102 has a large stretchability. By not having it, the restraining effect of the overlapping portion of the tube body 101 at the time of expansion increases.

(4) Usage Method of Gap Closure Device Next, a usage method of the gap closure device 10 will be described.
An existing concrete structure is prepared by preparing a tube body 101 having an overall length longer than the contour length of the gap 4 to be sealed, and bending a predetermined portion of the tube body 101 in a flat state to form a bent portion 104 as shown in FIG. The tube body 101 is inserted into the gap 4 formed between the opposing surfaces of the bodies 2 and 3.
Since the bent part 104 is formed in the tube body 101 and the whole is flat, even if the gap 4 is narrow, the installation work of the tube body 101 can be easily performed.

When most of the tube body 101 is disposed along the entire circumference, the tail end portion 107 of the tube body 101 is inserted into the cuff 102 that is externally mounted on the head side 106 side of the tube body 101, and the gap 4 including the cuff 102 is inserted into the gap 4. insert.
The head 106 side of the tube body 101 where the supply / discharge port 103 is provided is exposed to the outside of the gap 4.

  In this way, by closing one or both of the tube bodies 101 inserted so as to overlap with the cuff 102 and adjusting the exterior position of the cuff 102, the gap closure of the endless structure according to the total length of the gap 4 scheduled to be closed The size of the device 10 can be set.

  Next, fluid is supplied to the tube body 101 through the supply / discharge port 103, and the tube body 101 is expanded in the gap 4.

A ventilation spacer 105 is provided inside the flat tube body 101, and a gap is secured between the ventilation spacer 105 and the inner periphery of the tube body 101. Therefore, the bent portion 104 is passed through the ventilation gap. Thus, the fluid can pass through, and a constant expansion pressure can be applied over the entire length of the tube body 101.
The expanded tube body 101 is in contact with the opposing surfaces of the existing concrete structures 2 and 3 and seals the periphery of the gap 4.
Moreover, even if there are some irregularities on the opposing surfaces of the existing concrete structures 2 and 3, the gap 4 can be sealed by following the irregularities due to the flexibility of the tube body 101.

Since the tube body 101 is installed and expanded in a flat state, the tube body 101 swells greatly in the vertical direction in FIG. 4, whereas the bulge in the left-right direction is small.
In other words, most of the expansion pressure in the tube body 101 can be used for the surface-contacting force to the existing concrete structure to ensure high sealing performance, and the expansion pressure of the tube body 101 acts as a pull-out force of the tube body. Therefore, it is not necessary to provide a pop-out prevention device such as a support work outside the tube body 101.

  Further, since the tube body 101 is bent at a predetermined crossing angle at the bent portion 104, a step is generated at the upper and lower portions of the bent portion 104. When the tube body 101 is set and expanded in the gap 4, this step forms a minute gap that communicates the inside and outside of the gap 4. Through this minute gap, the inside of the gap 4 of the consolidated material is formed. In addition to functioning as an air vent from the gap 4 at the time of filling, it is also useful for checking the filling of the consolidated material.

As shown in FIG. 4, the tube bodies 101 polymerized in the cuff 102 are fixed because expansion is restrained by the cuff 102.
That is, as a result of increasing the frictional resistance in the contact surface range between the cuff 102 and the tube body 101 in proportion to the expansion pressure of the tube body 101, the polymerization of the tube body 101 is fixed and the tube body 101 may be pulled out of the cuff 102. Absent.

The setting of the formwork is completed by the above simple operation.
The tube body 101 is desirably expanded stepwise while adjusting the overall length of the tube body 101 without expanding the tube body 101 at a time.

The consolidated material 5 is injected into the gap 4 closed by the gap closing device 10.
As a method for injecting the consolidated material 5, for example, a known injection form such as injecting into the existing concrete structures 2 and 3 through injection holes formed in advance can be adopted.

During the operation of injecting the consolidated material 5, a minute gap is formed between the bent portions 104 of the expanded tube body 101 to communicate the inside and outside of the closed gap 4. Since the air in the gap 4 is squeezed out through this minute gap, not only the filling of the consolidated material 5 becomes smooth, but also the accumulation of air in the gap 4 closed by the gap closing device 10 is avoided. Thus, the consolidated material 5 can be filled to every corner.
Furthermore, the completion time of filling of the consolidated material 5 is determined by confirming leakage of the consolidated material 5 through a minute gap in each bent portion 104 of the tube body 101.

In the gap closing device 10 according to the present invention, the demolding operation is completed only by discharging the fluid of the tube body 101 and wiping and extracting the tube body 101.
The tube body 101 is deflated to release the fixation of the overlapped portion of the tube body 101, the tail end portion 107 of the tube body 101 is removed from the cuff 102, and the tube body 101 is simply pulled out and peeled off from the consolidated material 5. Can be removed while.
The extracted tube body 101 is diverted to the next clearance 4 together with the cuff 102.

In some cases, the cuff 102 is omitted, and the gap closing device 10 is configured only by the tube body 101.
In this example, as shown in FIG. 6, the tube bodies 101 need only be arranged so as to intersect each other within the gap 4 between the opposing surfaces of the existing concrete structures 2 and 3.

In this example, instead of the cuff 102, the opposing surfaces of the existing concrete structures 2 and 3 restrain the expansion of the overlapping portion of the tube body 101.
Further, in this example, the case where the ends of one tube body 101 are overlapped is illustrated, but it is needless to say that the ends of a plurality of tube bodies 101 may be overlapped.

The perspective view of the gap blocker concerning the present invention Plan view of gap closure device Sectional view of III-III in FIG. Cross-sectional view of gap closure device during expansion Explanatory drawing of the core wire in the tube body of the gap obstruction | occlusion apparatus of this invention Explanatory drawing of 2nd Example of the gap blocker of this invention

DESCRIPTION OF SYMBOLS 10 Clearance blocker 101 Tube body 102 Cuff 103 103 Supply / exhaust port 104 Bending part 106 Head part 107 End part 2, 3 Existing concrete structure 4 Crevice 5 Solidification material

Claims (2)

A gap closing device that is inserted into a gap formed between opposing faces of an existing concrete structure facing each other and filled with a consolidated material,
Consists of a tube body made of a non-stretchable material that can be flattened and foldable,
Providing a ventilation spacer that can be bent over a part or the entire length of the inside of the tube body;
Forming a supply / exhaust port with a check valve function in a part of the tube body,
When a folded portion is formed by obliquely folding a portion of the flattened tube body, a ventilation gap is formed between the ventilation spacer and the tube body positioned in the folded portion. It is characterized by
Gap closing device.   2. The tube body according to claim 1, further comprising a cuff that is slidably mounted on the tube body, and in a state where one and the other of the tube bodies inserted into the cuff are polymerized, the both ends of the tube body that have been polymerized are expanded by an expansion pressure. A gap closing device characterized in that it can be fixed with the cuff.

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