JP6512480B2 - Grout injection tube with ground subsidence detection device - Google Patents

Description

  The present invention, in the field of civil engineering and construction, is a large civil engineering structure or composite structure of steel or concrete composite structure supported and constructed by foundation piles on the shore or soft ground on the shore of a river or a coastal area. The present invention relates to a grout injection pipe with a ground subsidence measuring device used for measurement of the amount of ground subsidence of a bottom structure of a building structure and injection of a reinforcing material such as grout into a cavity formed by the ground subsidence.

  In recent years, natural disasters such as unforeseen disasters such as huge earthquakes, tsunamis, and heavy rains frequently cause collapse of structures in the field of civil engineering and construction, resulting in serious damage to people's property as well as people's property. In order to protect public structures from such natural disasters, when constructing a civil engineering and construction structure, equip the structure bottom plate etc. with a device to measure ground subsidence in advance and a device with a reinforcing function for a cavity generated by earthquake etc. In addition, we have found the fragile part of the bottom of the structure bottom plate early to prevent damage and have taken reinforcement measures.

For example, in a long outer cylindrical tube embedded and fixed in the ground, a long tightening bolt freely connected by bending a plurality of shaft wedge members is concentrically arranged so as to be insertable and removable. An inner pipe comprising a plurality of inner pipe members provided with a support plate on which an elastic sealing capable of coming into contact with the inner peripheral surface of the outer pipe is mounted, and inserted into and removable from tightening bolts; By providing a sealing pressure plate in contact with the sealing upper surface and tightening the upper end portion of the inner tube with a tightening bolt, the elastic sealing is pressed by the support plate and the pressure plate to press against the outer surface of the outer tube. An opening / closing device for a grout injection / investigation hole capable of easily inserting and removing an inner pipe for clamping the seal ring and a tightening bolt to the outer pipe even if the space above the outer pipe is small (see Patent Document 1). ).
The stretchable cylindrical body is stretched in the gap between the outer cylinder and the inner cylinder installed therein to connect the outer cylinder and the inner cylinder, so the movement of the inner cylinder becomes free, and measurement of land subsidence becomes easy and quick The measurement and grout injection apparatus of the ground subsidence of the bottom plate which can be performed to grasp the situation of ground subsidence appropriately, and can carry out grout injection operation promptly and appropriately (refer to patent documents 2.).
Communication that connects the ground and the space to the female member of the water blocking device, which is composed of a cylindrical body that communicates the ground and the space, and a water blocking device provided with a female member that closes the inside of the cylindrical body. A stop valve is provided for forming a hole and blocking the communication hole, and when the male member forming a pair with the female member of the water stop device is connected, the stop of the communication hole by the stop valve is released. It is functioning as a research hole and the solidification material injection device which can perform injection of solidification material safely by detecting spout of groundwater etc. (refer to patent documents 3.).
Aside from the grout holes, there are multiple inspection holes that can be loaded into secondary concrete products and in-situ concrete structures that form sluice, culverts, etc., subsidence, hollows, and inspection equipment that measures groundwater levels. It is provided independently in some places, and this inspection hole is formed by embedding synthetic resin pipe or steel pipe or ceramic pipe in a predetermined position of the structure in advance, and construction of civil engineering structure from the beginning A concrete civil engineering structure (see Patent Document 4) or the like, which can be loaded with

JP 10-266188 A Patent No. 3592190 gazette JP, 2009-299377, A Patent No. 4877558

  The measurement capacity of the apparatus for measuring the amount of settlement due to ground subsidence in the conventional concrete structure is about 900 mm or less, and the thickness of the bottom plate part corresponds to at most about 1000 mm. However, in recent years, the size of the civil engineering and building structure has been increased, the bottom plate member of the structure base portion has become thick, and it is difficult to cope with the conventional measuring device. For example, in the device of Patent Document 1, the bottom plate thickness of a structure such as a lock and a chimney provided in a river corresponds to a relatively thin plate thickness, and the amount of sink cavity is 900 mm or less. is there.

  Further, in the apparatus disclosed in Patent Document 2, when the groundwater level reaches the bottom plate bottom surface or the bottom plate bottom surface upper part, the gutter injection operation and the reverse ejection at the end are dangerous. Further, in the invention of the present document, since there is a wide space portion between the inner side of the outer cylindrical pipe and the outer side of the inner cylindrical pipe, the upper part of the outer cylindrical pipe and the lower end of the inner cylindrical pipe from the viewpoint of maintaining water tightness. The attached stretchable cylindrical body has a sealed structure that prevents water immersion from the outside. For this reason, when the inner cylinder descends due to ground subsidence, the air in the space is compressed, and an air pool is generated inside the outer cylinder and the outer side of the elastic cylindrical body, and the water is suspended from the lower end of the outer cylinder. And may interfere with the smooth descent of the inner cylinder tube. In the device disclosed in Patent Document 3, the shaft portion inserted in the sediment intrusion preventing member in the bottom structure of the bottom plate structure is restrained by the sediment intrusion preventing member, or mud water containing sediment causes clogging etc. at the intrusion preventive member lower surface. It is also conceivable that they are solidified and restrained. Further, in the device of Patent Document 2 and the device of Patent Document 3, when the civil engineering structure and the ground behave differently due to the influence of an earthquake or the like, the shaft portion or the inner cylinder installed inside has different behavior from left to right A situation in which the settlement measurement band or the settlement detection rod inserted into the ground is removed when the structure and the ground move up and down separately due to tilting or deformation and being restrained in contact with the outer tube or the like May cause the measurement of the amount of settlement to become impossible.

Therefore, installing the grout injection pipe with the ground subsidence measuring device in the bottom plate of the large-sized structure inevitably increases the labor burden in the handling and the installation operation of the device and a significant increase in the manufacturing cost. However, with the conventional device, measurement capacity is insufficient, injection and filling of reinforcing materials such as grout material becomes difficult, ground subsidence occurs due to defects such as disasters, and the bottom slab becomes hollow, and restoration occurs if the structure collapses. The cost is also huge.
The present invention secures good installation workability according to the height of the bottom plate of the structure, and provides a grout injection pipe with a ground settlement measuring device under the large size civil engineering building structure bottom plate excellent in operability and earthquake resistance. The purpose is to

Subsidence detector device with Guraudo injection tube dikes Therefore the present invention is the grouting pipe installed through the inside of civil engineering structures bottom plate vertically, is disposed over substantially the entire length of the grouting pipe subsidence A settlement detection guide tube having a rod and a check valve device tube are juxtaposed and fixedly installed in the internal tube fixture, and the grout injection tip nozzle can be pressed and inserted in the upper end opening of the check valve device. First lid, and a first check valve provided at the lower end opening thereof, the second lid closing the upper end opening of the grout injection pipe, and a second non-return valve at the lower end opening the valve is provided, wherein the subsidence gage guide tube, its together with the subsidence rod detection rod is connected to the subsidence plate that is suspended is inserted into vertically movable, and the inner surface and Joint Gap state of subsidence gage guide Third lid closing the upper end opening Is provided, subsidence gage guide tube through to the external measuring device the subsidence rod connecting lines can be routed, and that all threaded pipe with the outside measuring device is mountable is incorporated first It is the feature of A second feature of the present invention is that the flexible rod having a diameter smaller than the inner diameter of the subsidence measuring guide tube and having flexibility is wound on the subsidence rod. Furthermore, the third feature is that a pullout preventing plate is attached to the lower end of the detection rod . Furthermore, it is a fourth feature that the grout injection pipe with ground subsidence check position is divided up and down in advance at an arbitrary position to enable connection at a position according to the construction height of the structure bottom plate. In addition, the fifth feature of the present invention is to provide a free connection portion with the sink plate at the lower end of the sink rod so as to be able to connect to the previously installed sink plate later. Furthermore, in order to adjust the height of the actual finished surface to the design finish height of the upper surface of the structure bottom board, a sleeve pipe for adjusting the height of the same diameter as the grout injection pipe was connected in advance to the upper end of the grout injection pipe. As the sixth feature.

According to the invention there are the following advantages.
(1) A flexible water-permeable buffer material is wound around a subsidence rod incorporated in a subsidence measurement guide pipe internally provided in a grout injection pipe with a subsidence measuring device according to the present invention. When land subsidence occurs, water containing soil particles flows in from the lower end of the subsidence measurement guide pipe, but the permeable buffer material filters them and water flows into the same guide pipe, so the subsidence rod descends smoothly Do not disturb In addition, since the structure and the ground vibrate at different cycles when an earthquake occurs, there is a possibility that the sinking rod contacts and deforms in the same guide tube, and also has the function of the shock absorber.
(2) A sinking rod installed inside the sinking guide tube inside the sinking detection guide tube, the sinking plate of the flexible steel wire tip is connected to the ground, and the horizontal force at the time of the earthquake sinks It is transmitted from the plate to the steel wire. Since the steel wire has flexibility, it absorbs impact force against horizontal load and deforms, but continues the sinking action even under load. As the sinking rod, a CR rubber tube may be connected to a round bar steel, or a flexible round bar steel such as a piano wire may be considered.
(3) A plate with an inverted conical shape is attached to the tip of the detecting rod attached to the sinking plate at the tip of the sinking rod as a pull-out preventing material from the ground Since the detection rod is inserted, the connection with the ground becomes firmer, and reliable measurement of ground subsidence can be performed.
(4) An external measuring device and mounting method capable of measuring from a safe position at any time have been developed, and have a function capable of connecting these devices, and a grout injection tube with a ground subsidence measuring device It can be connected when installing the same, and can be connected as needed after installing the same injection tube.
(5) Ground subsidence amount surveying installation Grout injection pipe is divided up and down in advance at an arbitrary position, and it is possible to connect at a position according to the construction height of the structure bottom plate. Although it has been an obstacle to other operations at the time of incorporation, by dividing and assembling, other operation steps can be smoothly performed.
(6) The lower end of the sinking rod is provided with a free connection portion with the sinking plate so that it can be connected later to the sinking plate installed in advance, so that the sinking rod and the sinking plate can be connected properly even at invisible positions it can.

It is a side view showing typically the state where the grout injection pipe with a ground subsidence measuring device concerning the present invention was installed in a structure bottom plate. It is a side view which shows typically the state which the settlement apparatus internally installed in the grout injection pipe with a settlement amount measuring apparatus which concerns on this invention fell following the ground subsidence. It is a side view showing a plurality of examples of a sinking rod built into a sinking detection device concerning the present invention. It is a top view of the settlement board of the settlement apparatus concerning the present invention. They are a top view of a nonreturn valve concerning the present invention, and a side view showing typically an operation state. (A) is a sectional view taken along the line A-A of FIG. 1, (b) is a sectional view taken along the line B-B of FIG. 1, (c) is a sectional view taken along the line C-C of FIG. It is -D sectional view taken on the line. It is a schematic diagram which shows the state which attached the external measurement apparatus to the grout injection pipe with a ground subsidence inspection apparatus which concerns on this invention, and the drawing (A) side put side by side the settlement inspection guide pipe and the grout injection pipe in the same position. In the case (B), the figure shows the case where the subsidence measurement guide tube and the grout injection tube are separately disposed at different positions. (A) is a main part side cross-sectional view schematically showing the grout injection pipe according to the present invention divided vertically, (b) is a main part side cross-sectional view showing a joined state, (c) is an intermediate long nut and It is a side view showing a bolt, and (d) is a perspective view showing a sleeve pipe. (A) is a side sectional view showing a flexible connecting part provided at the lower end of the sinking rod inside a sinking inspection rod tube according to the present invention, and (b) and (c) are side sectional views showing the connecting procedure. . It is a principal part expanded section explaining a height adjustment method of a Groud injection pipe upper end concerning the present invention.

  Hereinafter, an embodiment in which a ground subsidence detection and grout injection apparatus according to the present invention is installed in a civil engineering structure a will be described based on the drawings, but for convenience, the same reference numerals are given to similar components. Explain.

FIG. 1 shows a grout injection pipe 1 with a ground subsidence measuring device according to the present invention installed in a structure a, and is a thick bottom plate of concrete and a composite structure constructed of steel and concrete. Shows a state of being attached to the structure bottom plate a1 having the
The lower surface of the structure bottom plate a1 is leveling concrete a2, and the lower surface represents the ground a3. In the installation procedure, after the ground a3 is smoothed out, a paper cylindrical frame a4 slightly larger than the diameter of the sink plate 12 is arranged in advance and the opening a5 is arranged in order to arrange the required number at a predetermined position. Set up and cast leveling concrete a2. After the leveling concrete a2 has reached the necessary strength, a double-edged a6 is performed in which the detection rod 15 fits to remove the paper cylindrical form frame a4 and connect it to the ground a3 surface, and dry mortar in it Insert a7. The dry mortar a7 is a mixture of cement and sand not kneaded with water. Thereafter, a grout injection tube 1 with a ground subsidence detection device is built, and the portion of the detection rod 15 protruding from the tip is inserted.
In order to maintain vertical stability, the built-in grout injection tube 1 with a ground subsidence detection device is provided with a fixture 2a joined to the side surface of the grout injection tube 2 and adjacent reinforcing bars disposed in the structural bottom plate a1. It is fastened or joined to a8, etc., and fixed so as not to move at the time of concrete placing of the structure bottom plate a1. The dry mortar a7 into which the protruding detection rod 15 of the tip of the grout injection tube 1 with ground subsidence measuring instrument is inserted absorbs the surrounding water and solidifies, and the detection rod 15 and the ground a3 are securely connected. Further, a water expansion rubber 24 is wound around the circumferential side surface of the grout injection pipe 2 in order to prevent the penetration of water such as ground water.

FIG. 1 shows a grout injection pipe 1 with a ground subsidence detection device, and a subsidence measurement guide pipe 3 and an upper check valve device pipe 4 are incorporated side by side into the grout injection pipe 2, and the upper check valve device A check valve 5 is screwed into the lower end of the pipe 4 and a device lid 6 b is screwed into the upper end. Further, a check valve 5 is also incorporated at the lower end of the grout injection pipe 2.

Figure 1 of the grouting pipe 2 subsidence test measuring guide tube 3 is in, and the upper check valve unit tube 4 is fitted and fixed to the inner設管fixture 2b, also the inner tube fixed to the grouting pipe 2 the lower end The tool 2b is incorporated, and the tube is fitted and fixed. Further, the through-hole is formed in the grout injection pipe 2 of the internal pipe fixing tool 2b, and the internal pipe fixing tool 2b is tightened with a necessary number of screw screws 2c. Device lids 6, 6a and 6b are screwed into and fitted to the grout injection pipe 2, the settlement detection guide pipe 3 and the check valve device 4, respectively. That is, a screw groove is provided on the upper portion of each tube, and a screw thread is provided on the side collecting surface of each device lid as well. Furthermore, an openable and closable groove is provided in the upper part of each device lid, and opening and closing can be freely performed by inserting and rotating the open / close device.

  As shown in FIG. 3, the subsidence detector 8 installed in the subsidence measuring guide pipe 3 of FIG. 1 incorporates the subsidence rod 8 and is crimped to the upper end of the flexible steel wire 8a. A bolt 10 with a ring is attached by means of a fitting 9 and a bolt 10 with a ring is screwed into the upper end thereof. The crimp fitting 9 is attached also to the lower end, and a screw groove is provided on the side peripheral surface thereof, and screwed in and fixed to the recess on the upper surface of the settlement plate 12.

  In the sinking rod 8, as shown in FIG. 3 (a), a steel wire 8a, and as shown in FIG. 3 (b), a CR rubber pipe 8c is fitted to a round bar steel 8b, FIG. 3 (c) As shown in FIG. 2, only the round bar steel 8b can be fitted on the upper surface of the sink plate 12. That is, a male screw portion is formed at the lower end portion of the round bar 8b, and can be screwed into and connected to the concave female screw groove on the top surface of the sink plate 12. A ring bolt 10 is screwed into the upper end of any of the dip rods 8 shown in FIG. 3 and can be installed in the dip device guide pipe. In addition, in the case of FIG. 3B, in order to be inserted into the CR rubber tube 8c, a detent-preventing return is applied to each of the insertion connection portions.

  In order to maintain the clearance between the inner surface of the subsidence measurement guide tube 3 and the subsidence detection device 7 in the subsidence rod 8 incorporated in the subsidence measurement device 7, the diameter is smaller than the inner diameter of the subsidence measurement guide tube 3 The flexible and permeable buffer mat 13 is wound, and when the water flows into the subsidence measurement guide tube 3, the subsidence measurement device 7 is smoothly lowered. In addition, there is a possibility that soil particles etc. are contained in the inflowing water, and it is possible to filter these. The permeable buffer mat 13 is wound around the entire portion of the sinking rod 8 as shown in FIGS. 3 (a) and 3 (b) and partially as shown in FIG. 3 (c). can do.

  A cylindrical rod connecting pipe 12a is provided in a protruding manner on the upper surface 9 of the sinking plate 12 so that the sinking rod 8 can be screwed in or fitted in, and the sinking rod 8 is a steel wire 8a, round bar steel In 8b, the inner peripheral surface of the rod connection pipe 12a is screwed so that it can be screwed in and fixed. For round bar steel 8b and CR rubber tube 8c connecting rod (b), the CR rubber tube 8c is fitted on the outside in the rod connecting tube 12a, so that the groove on the outer surface of the rod connecting tube 12a is not deviated from the rod connecting tube 12a. Mountains are provided.

  Further, a plurality of detection rods 15 are connected to the lower surface of the settlement plate 12, and a barbed inverted conical plate 15a is welded and joined to the tip thereof so as not to be pulled out from the ground a3. Moreover, in preparation for the case where a gap is generated between the lower surface of the settlement plate 12 and the ground a3, the grout inflow hole 15b is opened so that the grout flows in, and the water is accumulated on the lower surface of the depression plate 12 A water drainage hole 15c is opened so that water is drained at the time of pouring. In addition, the packing rubber 16 is stretched so that the lower surface of the grout injection pipe 2 and the upper surface of the settlement plate 12 do not come into direct contact, and when installing the grout injection pipe 1 with ground subsidence detection device It becomes.

  To measure the amount of settlement of the grout injection tube 1 with a ground subsidence detection device, release the device cover 6 screwed into the grout injection tube 2 and the device cover 6a of the settlement detection guide tube 3 and insert a measurement ruler , It is common to reach the bolt with ring 10 attached to the upper end of the sinking rod 8 and read the numerical value on the structure bottom plate a1. The measuring device b1 can be attached at the time of construction or after installation, it can be retrofitted after ageing, and the grout injection pipe 2 and the juxtaposed measuring device guide pipe 3 can be penetrated, and all screw pipes 17 Is incorporated. A protective cap 17a is fitted to the entire screw tube 17 so that adhesion of the concrete does not occur when the structure bottom plate a1 is placed in the concrete and the tube does not enter the tube. As for the attachment method of the external measurement device b1, as shown in FIG. 7, the sheath tube b2 connected to the device was screwed into the all screw tube 17 exposed to the outside of the grout injection tube 2 and wired inside the tube 17 The connection line b3 is fastened to the ring bolt 10 at the upper end of the subsidence rod 8 incorporated in the subsidence measuring device 7 installed in the subsidence measurement guide tube 3.

Fig. 2 shows a grout injection pipe 1 with a ground subsidence detector installed in the structure bottom plate a1, the ground a3 sinks, the ground a3 sinks, and the settlement measuring device 7 descends, the ground a3 When it sinks, the sinking rod 15 connected to the ground a3 pulls the sinking rod 8 along the sinking plate 12. After settling is stabilized, the amount of settling is read using a measuring ruler or the like according to the method described in the preceding paragraph, the cavity volume is calculated, and the amount of grout material is measured. In the grout injection operation, the apparatus lids 6 and 6b are released, the check valve 5 is pushed down by the grout injection nozzle a11, and the check valve 5 incorporated at the lower end of the same pipe 2 is pushed down to inject grout material into the cavity a10. To fill. In the case where a check valve prevents injection of water staying in the cavity, and furthermore, after injection and filling of grout material into the cavity a10, a cavity a10 is generated under the structure bottom plate a1 after years of age , Can be reused.

FIG. 5 shows the check valve 5, and a circular neoprene rubber 20 is stretched on the lower surface of a cylindrical water shut off valve frame 19 formed in a ring shape of a thermoplastic, It is sandwiched between a circular steel thin plate 21 and an approximately 2/3 round steel thin plate 21a. Approximately 1/3 yen penetrates the steel thin plate 21 and the neoprene rubber 20 and is fixed to the water shut off valve frame 19 at a plurality of locations with the screw 22, and the 2/3 circle part is fixed to the steel thin plate 21 a It is fixed at multiple locations.
Then, when the grout material is injected, when the steel thin plate 21a is pushed down by the tip of the grout injection nozzle a11, it is easily released, and if the nozzle is removed, it is restored by the elastic force of neoprene rubber.

  As shown in the (d) side of FIG. 7, the depression measurement guide pipe 3 is juxtaposed outside the grout injection pipe 2, and the fixing fitting 18 is fitted in the upper and lower parts thereof. It is tightened and fixed to the pipe. The lower end is also fixed by the same bracket 2c. By reducing the inner space area in the grout injection pipe 2, it is possible to reduce the cross-sectional defects of the structure bottom board a1. Further, a check valve 5 is incorporated at the lower end of the grout injection pipe 3. Furthermore, connection of the external measurement device b1 is also possible. Alternatively, as shown in the side (e) of FIG. 7, the grout injection pipe 2 and the settlement detection guide pipe 3 can be installed independently, and the grout injection pipe 2 is disposed at a predetermined position, The subsidence measurement apparatus guide pipe 3 can be disposed and observed at a particularly important part, and the external detection and measurement apparatus b3 can be connected as described above.

  The grout tube 1 with a ground subsidence detection device shown in FIG. 8 (a) is vertically divided into two, and the upper tube 2A of the same tube 2 is extended to the upper end of the lower tube B of the grout tube 2 installed in advance. It is made to descend and connect. The sleeve pipe 2d is welded and joined to the upper pipe 2A side peripheral surface of the grout pipe 2 in order to connect and join the upper pipe 2A and the lower pipe 2B, and when the upper pipe 2A is further lowered, the grout The lower pipe 2B of the pipe 2 is fitted into the inside of the sleeve pipe 2d, and when it is further lowered, the end faces of both pipes come into contact with each other and stop. Similarly, the lower end of the upper pipe of the split settlement inspection guide pipe 3 installed in the grout pipe 2 is located at the lower end of the sleeve pipe 2d, and the connection length of the sleeve pipe 2d is the lower pipe 2A of the grout pipe 2 Since the interior is installed at a position slightly lower than the upper end of the upper end of the lower end of the divided subsidence measurement guide pipe 3, the end faces of the upper and lower pipes are in close contact with each other.

  In addition, a downward bolt 8d is welded and joined to the lower end of the upper rod of the sinking rod 8 installed inside the sinking detection guide pipe 3 and divided into upper and lower parts, and furthermore, an intermediate long nut 8f is attached . The lower rod is welded to the upper end with an upward bolt 8e, and when the upper depression rod 8f is lowered, the middle long nut 8f at the tip is welded and joined upward to the upper end of the lower end. Contact 8e. And as shown in FIG.8 (b), it connects by rotating the sinking rod 8 of rod upper part. After confirming the connection, screw the tube fixing bolt 2f into the tube fixing hole 2e in which a plurality of internal threads are given on the peripheral surface of the sleeve tube 2d, and connect the grout tube 1 with the ground subsidence inspection device similarly divided up and down Then, as shown in FIG. 8C, an upward bolt 8d is welded and joined to the lower end of the upper rod, and an intermediate long nut 8f is attached. Here, as shown in FIG. 8D, a plurality of tube fixing holes having internal threads are bored in the sleeve tube 2d, and a tube fixing bolt 2f is screwed in and fixed.

  Further, as shown in FIG. 9 (a), a universal joint or the like is provided at the lower end of the sinking rod 8 to provide a free connection portion 8g with the sinking plate 2, and the sinking rod 2 is later fitted to the sinking plate 2 installed in advance. 8 may be connectable, and the rod plug 8i joined to the lower end of the sinking rod 8 to the upper surface of the sinking plate 2 is fitted and connected via the rod socket 8h. That is, as shown in FIG. 9 (b), the sinking rod 8 is inserted into the detection rod guide tube 1 and lowered, and as shown in FIG. 9 (c), only by the operation of pushing the sinking rod 8 downward. It can be connected to the sink plate 2. At that time, even if relative positional deviation occurs on both sides, it is automatically corrected by the displacement characteristic of the universal joint 8g. Therefore, the sinking rod and the sinking plate can be properly connected even at an invisible position.

  In addition, as shown in FIG. 10, a height difference occurs with respect to the design finish height H of the upper surface of the structure bottom board a, and an error of the height occurs as in the actual finish surface H1, as a countermeasure. The socket pipe 2e is joined to the upper end of the grout injection pipe 2, and a sleeve pipe 2f for height adjustment having the same diameter as that of the grout injection pipe 2 is fitted to match the actual finished surface H1. Thereafter, the device cover 6 is fitted and the height adjustment is finished. That is, on the inner peripheral surface of the socket tube 2e, the screw 2g is applied on the entire peripheral surface except the joint surface, and on the entire side peripheral surface of the sleeve tube 2f, the screw 2g is applied. After the upper end of the sleeve pipe 2f is aligned with the actual finished height H1 by moving up and down 2f, the device cover 6 is screwed into a screw previously applied to the upper surface of the inner surface of the sleeve pipe 2f to adjust the height. The fixing length L1 of the sleeve tube 2f and the height adjustment margin L are set so that the sleeve tube 2f does not deviate. First, after the height adjustment margin L is determined, the total length of the sleeve tube 2f is determined.

1 ground subsidence inspection installation grouting injection pipe 2 grout injection pipe 2A split grout injection pipe upper pipe 2B lower grout injection pipe lower pipe 2a fixing bracket 2b internal pipe fixing tool 2c screw screw 2d sleeve pipe 2e socket pipe 2f high Sleeve tube for adjustment 2g Screw 3 Settlement detection guide tube 4 Upper check valve device tube 5 Check valve 6 Device cover 6a Device cover 6b Device cover 7 Settlement detection device 8 Sinking rod 8a Steel wire 8b Round bar steel 8c CR Rubber tube 8d upper connection bolt 8e lower connection bolt 8f middle long nut 8g rod universal joint (universal connection part)
8h rod socket 8i rod plug 9 crimped bracket 10 bolt with ring 11 screwed crimped fitting 12 sink plate 12a rod connection pipe 13 water permeable buffer mat 14 fixed ring 15 detection rod 15a inverted conical plate 15b grout inflow hole 15c water drainage hole 16 Packing rubber 17 All screw tube 17a Protective cap 18 Tube fixing bracket 19 Water blocking valve frame 20 Neoprene rubber 21 Steel thin plate 21a Steel thin plate 22 Screw screw a Structure a1 Structure bottom plate a2 Smoothing concrete a3 Ground a4 Paper cylinder Frame a5 Opening a6 Double hole a7 Dry mortar a8 Sand a9 Rebar etc. a10 Cavity a11 Grout injection tip nozzle b1 External measuring device b2 Sheath tube b3 Connection line

Claims (6)

A grout injection pipe installed vertically through the bottom of a civil engineering and construction structure bottom plate, the settlement detection guide pipe having a sinking rod disposed over substantially the entire length of the grout injection pipe, and a check valve device pipe. A first lid fitted and fixed to a pipe fixture and having a grout injection tip nozzle press-insertable at the upper end opening of the check valve device, and a first check valve at the lower end opening The grout injection tube is provided with a second lid closing the upper end opening, and a second check valve is provided at the lower end opening, and a detection rod is suspended in the settlement detection guide tube subsidence plate connected to said subsidence rod vertically movable, and subsidence gage third lid for closing off the upper end opening while being inserted into the guide of the inner surface and Joint Gap state is provided, subsidence gage Through the guide tube external measuring device and the above Possible wiring connection line of the lower rod, and subsidence biopsy device with grout injection pipe, characterized in that with the outside of the measuring device the full screw tube is incorporated attachable. 2. A grout injection tube with a ground subsidence detector according to claim 1 , wherein a flexible water-permeable buffer material having a diameter smaller than the inner diameter of the subsidence measurement guide tube and having flexibility is wound on the subsidence rod . The grout injection pipe with a ground subsidence inspection device according to claim 1 or 2 , wherein a pullout prevention plate is attached to a lower end of the detection rod . The ground subsidence amount gage置付grouting pipe is divided in advance vertically in any position, according to claim 1 to claim 3, characterized in that the connectable at a position corresponding to the installation height of the structure bottom plate Grout injection pipe with ground subsidence detector according to any of the above. The ground subsidence inspection according to any one of claims 1 to 4 , characterized in that a free connection portion with a sink plate is provided at the lower end of the sink rod, and it is possible to connect later to a sink plate installed in advance. Grout injection tube with device. In order to adjust the height of the actual finished surface to the design finish height of the upper surface of the structure bottom board , it is characterized in that a sleeve pipe for height adjustment with the same diameter as the grout injection pipe is connected in advance to the upper end of the grout injection pipe. The grout injection pipe with a ground subsidence measuring device according to any one of claims 1 to 5 .

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