JP2018096108A - Grout material filling method and system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent damaging of a pump and pipeline, without leaving a void in an insertion hole.SOLUTION: A grout material filling system 1 of the present invention includes a bottom mold 2 installed on an opening 8 of an insertion hole 7 formed almost vertically upward on a reinforced concrete building frame 6, and a booster pump 5 communicated and connected with an injection port 3 provided on the bottom mold, through injection pipeline 4. The bottom mold 2 is configured to block outflow of mortar from the insertion hole 7 through an air vent port 11 after an air vent material 10 has been pulled out from the air vent port, as well as outflow of mortar from the insertion hole 7 through the injection port 3. A relief valve 13 is provided on the injection pipeline 4 as pressure adjustment means, the relief valve discharging the grout material outside of the injection pipeline 4 only when pressure of the grout material inside the injection pipeline 4 exceeds a preset value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grout material filling method and system mainly applied to a grout material filling operation into an insertion hole into which a shear reinforcement is inserted.

  When constructing reinforced concrete structures, shear reinforcements may be placed to support out-of-plane shear forces acting on the walls that make up the structures. When shear strength is desired, additional shear reinforcement is required for existing reinforced concrete structures.

  As means for performing such shear reinforcement, an earthquake-proof reinforcement method using a shear reinforcement called “multiple nut bar” (registered trademark) is known.

  Such a shear reinforcement device is composed of a PC steel rod and a disk-like or nut-like fixing member attached in the vicinity of both ends thereof. For example, when installed on the side wall of a box culvert, an insertion hole is provided in the side wall. After the hole is horizontally drilled, the grout material is filled in the insertion hole, and then a shear reinforcement tool is inserted so as to be embedded in the grout material.

  In this case, after the grout material is solidified, the grout material and the surrounding concrete frame are integrated, so that the inserted shear reinforcement acts on the side wall of the box culvert in the above example. The function of supporting the out-of-plane shearing force or resisting the out-of-plane shearing force is exhibited.

  On the other hand, when the part to be seismically reinforced is located above the construction side like the top plate of a box culvert, an upward insertion hole is formed in the upper part, and then shear reinforcement is applied to the insertion hole. In addition to inserting and temporarily fixing the tool, a hollow air release member made of a hose, pipe, etc. is placed in the insertion hole so that its upper end is located directly below the uppermost part of the insertion hole. Then, the bottom opening of the insertion hole is closed with the bottom mold.

  Next, the grout material is injected upward through the injection port provided in the bottom mold, but if the grout material flows out from the air vent member, the filling into the insertion hole is thereby completed. Since it can be confirmed, the injection of the grout material is finished at this point.

JP 2010-185247 A JP 2014-114552 A Japanese Unexamined Patent Publication No. 2015-028266

  The air vent member is indispensable at the time of injecting the grout material in that it does not leave air in the upper part of the insertion hole, but if the grout material is solidified with this remaining, the shear reinforcement will There is a possibility that the function cannot be fully exhibited.

  Therefore, before the grout material solidifies, the air bleed member must be pulled out and removed from the insertion hole. However, when the air bleed member is pulled out, the volume reduction due to removal does not remain in the insertion hole as a gap. , Continue to pressurize the grout material with the pressurization pump, and after removing the air vent member, it is necessary to stop the pressurization pump after quickly closing the air vent of the bottom formwork through which it has been inserted. is there.

  However, it is difficult to match the timing of the operation of closing the air vent and the operation of stopping the pressurizing pump. When the closing operation is delayed, the grout material flows out of the insertion hole through the air vent and the gap is inserted into the insertion hole. When the operation of stopping the pressurizing pump is delayed, the pressure of the grout material suddenly rises, causing a problem that the pressurizing pump and piping connected thereto are damaged.

  The present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a grout material filling method and system capable of preventing damage to a pump and piping without leaving a gap in an insertion hole.

In order to achieve the above object, the grout filling method according to the present invention, as described in claim 1, forms an insertion hole upward in a rock mass, a concrete frame or other reinforcement target site, and then reinforces the insertion hole. Insertion arrangement of means, insertion arrangement of the air bleed member into the insertion hole in a form where the upper end is located immediately below the uppermost part of the insertion hole, and the air bleed member inserted into the air vent of the bottom mold The bottom mold is installed in the opening of the insertion hole, and then the insertion hole is operated by operating a pressure pump connected to the injection port of the bottom mold via an injection member. In the grout filling method of starting the injection of grout into
Waiting for the grout material to flow out from the air vent member after starting the injection of the grout material, the air vent member or the air vent port after the air vent member has been withdrawn is blocked The flow of the grouting material from the insertion hole is blocked, and then the pressure pump is stopped after the flow of the grouting material from the insertion hole is blocked using the injection port or the injection member as a blocking portion. Alternatively, while stopping the pressurizing pump and blocking the outflow of the grout material from the insertion hole by using the injection port as a blocking part in response to the stop, the injection is performed while the pressurizing pump is being operated. When the pressure of the grout material in the member for use exceeds a set value, the grout material is discharged to the outside of the injection member.

Further, as described in claim 2, the grout filling system according to the present invention is installed at the opening of the insertion hole formed upward so that the reinforcing means can be inserted and arranged in the rock mass, the concrete frame or other parts to be reinforced. A bottom mold frame provided with an air vent port through which an air vent member arranged in the insertion hole is inserted so that an upper end is located immediately below the uppermost part of the insertion hole, and provided on the bottom mold frame In a grout material filling system comprising a pressure pump connected to an inlet through an injection member,
Blocking outflow of grout material from the insertion hole with the air vent after the air vent member or the air vent member has been pulled out as the shut-off site and the insertion with the injection port or the injection member as the shut-off site When the pressure of the grout material in the injection member exceeds a set value by blocking the outflow of the grout material from the hole, pressure adjusting means capable of discharging the grout material to the outside of the injection member Is provided.

  Moreover, the grout material filling system according to the present invention is provided with air vent side blocking means for blocking outflow of the grout material from the insertion hole with the air vent port as a blocking portion.

  Further, the grout material filling system according to the present invention comprises a section formed by cutting and a sheet body extending around the section, and the air vent member is inserted in such a manner that the section is pushed open. A sheet-like elastic material configured to return from a state in which the section is opened out of the surface of the sheet main body to the same plane as the sheet main body, or a shape in which an opening is provided and the opening is expanded A sheet-like elastic material configured to return from the expanded state to the contracted state as the air bleed member inserted through the air bleed member is pulled out is provided as the air bleed side blocking means. .

  Further, the grout material filling system according to the present invention is an air configured to be movable back and forth between a closed position for closing the air vent and an open position for moving forward or backward from the closed position to open the air vent. A release side shutter plate is provided as the air release side blocking means.

  In addition, the grout material filling system according to the present invention includes injection side blocking means for blocking outflow of the grout material from the insertion hole using the injection port as a blocking site under the operation of the pressurizing pump.

  Further, the grout material filling system according to the present invention is an injection-side shutter configured to be movable back and forth between a closed position for closing the injection port and an open position for moving forward or backward from the closed position to open the injection port. A plate is provided as the injection side blocking means.

  In order to fill the grout material using the grout material filling method and system according to the present invention, first, an insertion hole is formed upward in a rock mass, a concrete frame, or other reinforcement target portion.

next,
(a) Placement of reinforcing means in the insertion hole
(b) Arrangement of insertion of the air bleeding member into the insertion hole with the upper end positioned directly below the top of the insertion hole;
(c) The bottom mold is installed at the opening of the insertion hole in a form in which the air vent member is inserted through the air vent of the bottom mold. In this case, the order in which (a) to (c) are performed is arbitrary and may be performed in the order described above, but after performing (a), (b) and (c) are performed. At the same time, that is, after the reinforcing means is inserted and arranged, the bottom mold frame with the air bleeding member attached thereto may be installed at the opening of the insertion hole, or (a) to (c) are performed simultaneously, that is, the reinforcing means In addition, when the bottom mold frame with the air bleeder member attached is lifted and inserted into the insertion hole, and the upper surface of the bottom mold frame contacts the opening edge of the insertion hole, it is fixed to the insertion hole opening in that state. It doesn't matter.

  Next, the injection of the grout material into the insertion hole is started by operating a pressure pump connected to the injection port of the bottom mold, and after the injection starts, the grout material flows out from the air vent member. Waiting for it to flow out, the outflow of the grout material from the insertion hole is blocked using the air vent member or the air vent port after the air vent member is pulled out as a shut-off portion.

  A specific configuration for blocking the air bleeding member as a blocking portion includes a configuration in which the air bleeding member is bent or sandwiched when the air bleeding member has flexibility.

  Next, the injection pump or the injection member is used as a blocking part to stop the flow of the grout material from the insertion hole and then stop the pressurizing pump (hereinafter referred to as the preceding blocking), or stop the pressurizing pump. In response to the stop, the outflow of the grout material from the insertion hole is blocked using the injection port as a blocking site (hereinafter referred to as simultaneous blocking).

  A specific configuration for blocking the injection member as a blocking site includes a configuration in which the injection member is bent or sandwiched when the injection member has flexibility.

  Here, the pressurizing pump starts from the start of injection of the grout material into the insertion hole by activation, completes filling of the grout material into the insertion hole, blocks the outflow of the grout material on the air vent side, If the pressure of the grout material in the injecting member exceeds the set value during that time, the operation is continued without interruption until the stop after the previous shut-off or the stop at the simultaneous shut-off. The grout material is discharged to the outside of the injection member.

  In this case, even if the pressure of the grout material rises in the injection member due to the shut-off on the air vent side or the preceding shut-off on the inlet side, the size may exceed the set value and become excessive. Thus, it is possible to prevent the injection member or the pressure pump from being damaged or the injection member from being dropped at the connection point.

  On the other hand, when the air vent port side is shut off or the inlet port side is shut off in advance, the pressure pump continues to operate without being stopped. It does not flow out through the air vent or the inlet and no gap is generated in the insertion hole.

  The part to be reinforced mainly corresponds to a concrete frame, in particular, a reinforced concrete frame. In this case, as a reinforcing means, a shear reinforcing member such as a shear reinforcing bar or a shear reinforcing tool represented by "Multiple Nut Bar" (registered trademark). However, as long as the reinforcing means is inserted into the upwardly formed insertion hole and the grout material is filled in that state, the specific configuration is arbitrary, for example, rock It is also possible to configure with a natural ground such as a rock bolt or an anchor embedded in the natural ground.

  The insertion hole formed upward is an object of the present invention, but upward does not mean only vertically upward, and there is a possibility that air may remain when the grout material is injected, that is, the opening position. It means that the hole bottom position is higher than that.

  The air bleed member can be constituted by a hose, a pipe, etc., and the material of the air bleed member is not limited when it is pulled out and removed. The injection member can also be constituted by a hose, a pipe or the like.

  The bottom mold can be installed at the site to be reinforced with its upper surface in contact with the opening periphery of the insertion hole, and if necessary, adjust the unevenness at the opening periphery of the insertion hole. Any configuration may be used as long as the liquid tightness at the contact point can be secured.

  The pressure adjusting means discharges the grout material out of the injection member only when the pressure of the grout material in the injection member exceeds the set value, and when the pressure returns below the set value, the grout material It is assumed that the pressure is applied again toward the injection port, and for example, a relief valve can be used.

  In the grout material filling system according to the present invention, it is arbitrary how to shut off on the air vent side or advance shut off on the inlet side, and bend or sandwich a flexible air vent member. It is possible to shut off the air vent member as a shut-off site, or to cut off the injecting member as a shut-off site by bending or sandwiching a flexible injecting member. Equipped with air venting side blocking means to block outflow of grout material from the insertion hole using the mouth as a blocking site, or to block outflow of grout material from the insertion hole using the injection port as a blocking site under the operation of a pressure pump If the injection side blocking means is provided, a more reliable and quick blocking operation can be performed.

  The air vent side blocking means is optional in construction as long as it can block the outflow of the grout material from the insertion hole through the air vent, for example, a section formed by cutting and a sheet main body extending around it. The sheet-like elastic material is formed from the state in which the slice is opened out of the surface of the sheet body as the air-bleeding member is inserted so that the slice is pushed open. The sheet body is configured to return to the same plane as the sheet main body, or is configured by a sheet-like elastic material provided with an opening, and the sheet-like elastic material is inserted in a form in which the opening is expanded. If the opening is restored from the expanded state to the contracted state as the air bleed member is pulled out, the grouting material flow out due to the air bleed member being pulled out is the same as the pulsing operation. It is possible to prevent in, it is not necessary to separately receive a bucket, such as the grout material, which has been flowing out through the air vent opening.

  If the section is cut and the adjacent part is elastically deformed and pushed open to the insertion hole side, and the insertion space of the air vent member is formed at the cut part by the push and open, the section is not necessarily cut. The shape is U-shaped, cruciform, C-shaped, etc., and the section is not limited to a rectangular shape, triangular shape (fan shape), or semicircular shape. In addition, even if it is a straight cut, the adjacent portion is included as a slice even when the adjacent portion acts as described above.

  Here, in each of the above sheet-like elastic materials, it is assumed that the grout material leaks through a cut or an opening, but if the leakage speed is slight, the air vent may be used as necessary. Appropriate known water stoppage measures such as applying a waterstop tape can avoid the occurrence of a gap in the insertion hole.

  On the other hand, if the leakage rate of the grout material through the cuts and openings, particularly through the openings is large, and there is a possibility that voids are generated in the insertion holes, instead of the above-mentioned respective sheet-like elastic materials, In addition to the elastic material, the air release side shutter plate configured to be movable back and forth between a closed position that closes the air release port and an open position that moves forward or backward from the closed position to open the air release port. You may make it provide as a interruption | blocking means.

  In this way, after operating the air bleeding side shutter plate, it is possible to reliably prevent the grout material from flowing out from the insertion hole through the air bleeding port, and to use each of the above-mentioned sheet-like elastic materials together. In this case, since the outflow of the grout material accompanying the extraction of the air vent member can be reduced to some extent simultaneously with the extraction operation, the labor of receiving the grout material flowing out through the air vent port is simplified, The subsequent operation of the air release side shutter plate can be performed with a time margin.

  The injection side blocking means may be of any configuration as long as it can block the outflow of the grout material from the insertion hole through the injection port.For example, the injection side blocking means is closed and closed or closed from the closed position. An injection side shutter plate configured to be movable back and forth between the opening position where the inlet is opened can be provided as the injection side blocking means.

Schematic of the grout material filling system 1 according to this embodiment. It is the figure which showed the bottom mold 2, Comprising: (a) is a whole disassembled perspective view, (b) is a whole perspective view. Explanatory drawing which showed the procedure of the grout material filling method which concerns on this embodiment. It is the figure which showed the modification which provided instead of the air release side shutter board 26 and provided the sheet-like elastic material 41, Comprising: (a) is a whole disassembled perspective view, (b)-(d) is the description which showed the effect | action. Figure. The perspective view which showed the effect | action which concerns on the modification of the sheet-like elastic material 41. FIG. The perspective view which similarly showed the effect | action which concerns on the modification of the sheet-like elastic material 41. FIG. The perspective view which similarly showed the effect | action which concerns on the modification of the sheet-like elastic material 41. FIG. It is the figure which showed the modification which provided the air release side shutter board 26 and the sheet-like elastic material 41 side by side, Comprising: (a) is a whole disassembled perspective view, (b)-(e) is explanatory drawing which showed the effect | action. Schematic which showed the modification of the grout material filling system which concerns on this embodiment. It is the figure which showed the modification regarding the simultaneous interruption | blocking at the injection side, Comprising: (a) is a whole disassembled perspective view, (b)-(d) is explanatory drawing which showed the effect | action.

  Embodiments of a grout material filling method and system according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a schematic view showing a grout material filling system according to this embodiment. As shown in the figure, the grout material filling system 1 according to the present embodiment is applied to seismic reinforcement using a reinforced concrete frame 6 as a reinforcement target portion, and is formed substantially vertically upward on the reinforced concrete frame. A bottom mold 2 installed in the opening 8 of the insertion hole 7 and a pressurizing pump 5 connected to an injection port 3 provided in the bottom mold via an injection pipe 4 as an injection member. The mortar as a grout material pumped along the injection pipe 4 from the pressurization pump 5 in a state where the shear reinforcement 9 as a reinforcing means is inserted and arranged in the insertion hole 7 is inserted into the insertion hole 3 from the injection hole 3. By injecting into the reinforced concrete housing 7, the shear reinforcing tool 9 is integrated with the reinforced concrete housing 6 through the mortar filled in the insertion hole so that the reinforced concrete housing can be shear-reinforced.

  For example, as shown in the figure, the shear reinforcement 9 may be composed of a rod-shaped PC steel rod and a pair of fixing nuts screwed to respective ends of the PC steel rod.

  The bottom mold 2 is provided with an air vent port 11 along with the inlet port 3, and an air vent member 10 is inserted into the air vent port so that the upper end is located directly below the uppermost portion of the insertion hole 7. When the mortar is injected under pressure, the air in the insertion hole 7 is expelled from the insertion hole through the air vent member 10 and the top of the insertion hole 7 when the mortar flows out from the lower end of the air vent member 10. It can be confirmed that the mortar has been injected to just below, that is, the mortar has been injected to every corner without leaving a gap in the insertion hole 7.

  The air bleeding member 10 may be constituted by a resin pipe or hose, for example.

  Here, the bottom mold 2 has a flow of mortar from the insertion hole 7 through the air vent port after the air vent member 10 has been pulled out from the air vent port 11, and from the insertion hole 7 through the inlet port 3. The injection pipe 4 is provided with a relief valve 13 as a pressure adjusting means, and the relief valve sets the pressure of the mortar in the injection pipe 4. When the value is exceeded, a part of the mortar is discharged out of the injection pipe 4 and returned to the hopper 12 connected to the supply side of the pressurizing pump 5, and the pressure of the mortar in the injection pipe 4 When the pressure returns below the set value, the entire amount of the mortar is pumped toward the injection port 3 again.

  FIG. 2 is an overall exploded perspective view and an overall perspective view showing the bottom mold 2. As can be seen from these figures, the bottom mold 2 is the same as the lower plate 22 with the connection port 28 to which the injection pipe 4 is connected projecting downward, the injection side shutter plate 24 and the injection side shutter plate. Two injection-side guide plates 23a and 23b arranged on the respective longitudinal sides of the injection-side shutter plate so as to be in-plane and an upper plate 21 in which two circular openings 27 and 29 are formed are connected to the injection-side. The shutter plate 24 and the two injection side guide plates 23 a and 23 b are stacked so as to be sandwiched between the lower plate 22 and the upper plate 21, and the air bleeding side guide plate 25 is disposed on the lower surface of the lower plate 22. The circular opening 27 of the upper plate 21 and the connection port 28 of the lower plate 22 are concentric with each other, so that the circular opening 29 of the upper plate 21 and the injection side The circular opening 30 formed in the id plate 23a, the circular opening 31 formed in the lower plate 22 and the circular opening 32 formed in the air bleeding side guide plate 25 are positioned so as to be concentric with each other, and then the air bleeding side Bolts 37a and 37a are inserted into bolt holes 33a and 33a formed in the guide plate 25, bolt holes 34a and 34a formed in the lower plate 22, and bolt holes 35a and 35a formed in the injection side guide plate 23a. The bolts 37b and 37b are inserted into the bolt holes 34b and 34b formed in the lower plate 22 and the bolt holes 35b and 35b formed in the injection side guide plate 23b. Then, they are screwed into the bolt holes 36b, 36b of the upper plate 21 to be interconnected. .

  Here, the circular opening 27 of the upper plate 21 and the connection port 28 of the lower plate 22 constitute the injection port 3 described above, the circular opening 29 of the upper plate 21, the circular opening 30 provided in the injection side guide plate 23a, the lower step The circular opening 31 provided in the plate 22 and the circular opening 32 provided in the air bleeding side guide plate 25 constitute the air bleeding port 11 described above.

  The air vent side guide plate 25 is configured by extending a folded portion at each longitudinal side edge of the groove-shaped recess, and the above-described circular opening 32 is formed at the bottom of the groove-shaped recess. The above-described bolt holes 33a are respectively formed in the insertion space formed between the groove-shaped recess and the lower surface of the lower plate 22 disposed on the opening side thereof, but in the T-shaped air vent side. A shutter plate 26 can be inserted.

  The air bleeding side shutter plate 26 is guided by the air bleeding side guide plate 25 along the arrow direction in the figure, and closes the air bleeding port 11 at a portion 38 near its tip (the dashed line in the figure) and the closing position. From the insertion hole 7 through the air vent 11 at the closed position, the air vent 11 can be moved forward and backward from the open position (solid line). It functions as an air vent side blocking means for blocking the outflow of mortar.

  On the other hand, the injection-side shutter plate 24 is sandwiched between injection-side guide plates 23a and 23b arranged on the longitudinal sides thereof, and is guided along the arrow direction of the injection-side guide plate by the injection-side guide plates 23a and 23b. The circular opening 33 formed in the shutter plate is displaced from the injection port 3 as a whole so as to close the injection port (the dashed line in the same figure) and from the closed position to the left side in the same figure (from the left side) When the circular opening 33 is concentric with the injection port 3, the circular opening 33 is configured to be movable back and forth between the open position (the solid line in the figure). 3 functions as injection side blocking means for blocking mortar outflow from the insertion hole 7 via 3.

  The injection side shutter plate 24 has bent portions 39a and 39b provided at the short side edge portions thereof, respectively, abutting against the opposing edge portions of the lower plate 22, so that between the injection side guide plates 23a and 23b, Alternatively, it is possible to prevent the upper plate 21 and the lower plate 22 from slipping out or falling off, but the bent portion 39a is moved to the left side of the figure so that the circular opening 33 is concentric with the injection port 3. Is brought into contact with the edge of the lower plate 22 and moved to the right side of the figure so that the bent portion 39b contacts the edge of the lower plate 22 at a position where the circular opening 33 is removed from the injection port 3 as a whole. Since the bent portions 39a and 39b each function as a stopper, it is possible to easily switch between the opening operation and the blocking operation at the injection port 3.

  In addition, the bolt hole 40 is formed in each of the four corners of the upper plate 21, and the bottom mold frame 2 can be fixed to the reinforced concrete frame 6 using a bolt (not shown) inserted through the bolt hole. In addition, the lower plate 22 has notches formed at four corners thereof so that the fixing operation is not hindered.

  In order to fill the insertion hole 7 with mortar using the grout material filling system 1 according to this embodiment, first, the insertion hole 7 is formed upward in the reinforced concrete frame 6.

  Next, the insertion arrangement of the shear reinforcement 9 in the insertion hole 7, the insertion arrangement of the air vent member 10 in the form where the upper end is located immediately below the uppermost portion of the insertion hole 7, and the air vent member 10 is the bottom The bottom mold is placed in an arbitrary order at the opening of the insertion hole 7 inserted into the air vent 11 of the mold 2.

  Specifically, for example, after the shear reinforcement tool 9 is inserted and arranged in the insertion hole 7 and temporarily fixed, the air vent member 10 is preliminarily attached to the bottom mold 2, and then the bottom mold 2 is lifted and preceded thereto. When the air vent member 10 is inserted into the insertion hole 7 and the upper surface of the bottom mold frame is in contact with the opening peripheral edge of the insertion hole 7, bolts 40 are formed in the bolt holes 40 formed at the four corners of the upper plate 21 in that state. The bottom mold 2 may be installed at the opening of the insertion hole 7 by fixing the tip to the reinforced concrete housing 6.

  Next, the injection of the mortar into the insertion hole 7 is started as shown in FIG. 3 (a) by operating the pressurizing pump 5 communicated with the injection port 3 of the bottom mold 2. After the start, after waiting for the mortar to flow out from the air vent member 10 (FIG. (B)), the air vent member is pulled out from the air vent port 11 (FIG. (C)).

  Here, since the start of injection of the mortar into the insertion hole 7 by activation, the pressurization pump 5 has been continuously operated even during and after the air bleeding member 10 is being pulled out. Therefore, even if the air bleeding member 10 is pulled out, the amount of mortar corresponding to the volume reduction is quickly replenished by the pressure pump 5, and there is no possibility that a gap is generated in the insertion hole 7. In addition, after the air bleeding member 10 is pulled out, mortar flows out from the air bleeding port 11, and the outflow may be temporarily received with a bucket or the like as necessary.

  Next, the air vent side shutter plate 26 is advanced to the closed position, and the air vent port 11 is closed at the tip vicinity portion 38 to block outflow of mortar from the insertion hole 7 through the air vent port.

  In this way, the pressure of the mortar in the injection pipe 4 increases, but when this value exceeds the set value of the relief valve 13, the relief valve is activated and the mortar flowing through the injection pipe 4 flows. A part is discharged to the outside and returns to the hopper 12 ((d) in the figure).

  On the other hand, since the pressurizing pump 5 is continuously operated without being stopped, the pressurizing action by the pressurizing pump reaches the insertion hole 7 through the injection port 3. Therefore, there is no possibility that the filled mortar flows out from the injection port before the injection port 3 which is the next step is blocked and a gap is generated in the insertion hole 7.

  Next, the injection-side shutter plate 24 is advanced and retracted to the closed position by hitting the bent portion 39b with, for example, a hammer (advanced when viewed from the left side of FIG. 2 and retracted when viewed from the right side). By shifting from the inlet 3 as a whole, the flow of mortar from the insertion hole 7 through the inlet 3 is blocked (preceding block).

  In this way, the mortar in the injection pipe 4 is maintained at a high pressure state, but a part of the mortar flowing through the injection pipe 4 is discharged to the outside by the relief valve 13 and returns to the hopper 12. (FIG. 3 (e)).

  After the injection side shutter plate 24 is moved back and forth to the closed position, the pressurizing pump 5 is stopped at an appropriate timing.

  As described above, according to the grout material filling system 1 and the grout material filling method using the grout material filling system 1 according to the present embodiment, the pressure of the mortar is changed by the shut-off of the air vent 11 or the prior shut-off of the inlet 3. Even if the pressure rises within 4, the relief valve 13 does not cause the size of the relief valve 13 to exceed the set value and become excessive, thus preventing the injection pipe 4 and the pressure pump 5 from being damaged. it can.

  On the other hand, when the air vent port 11 is shut off or the inlet port 3 is shut off in advance, the pressurizing pump 5 operates continuously without being stopped. In addition, there is no possibility that a gap is generated in the insertion hole 7 by flowing out from the air vent 11 or the inlet 3.

  In addition, according to the grout material filling system 1 according to the present embodiment, the air outlet side shutter plate 26 capable of closing the air outlet 11 and the injection side shutter plate 24 capable of closing the inlet 3 are provided. Therefore, the mortar outflow from the insertion hole 7 through the air vent 11 and the inlet 3 can be quickly and reliably blocked.

  In the present embodiment, the case where the grout material is a mortar is taken as an example, but other hydraulic materials can be used instead of the mortar, and a chemical solution and other various grout materials can also be used.

  Further, in the present embodiment, the air vent side blocking means of the present invention is configured by the air vent side shutter plate 26, but instead of the air vent side shutter plate, as shown in FIG. The mortar flowing out from the insertion hole 7 may be constituted by the sheet-like elastic material 41 that blocks the air bleeding member 10 withdrawing.

  In the modification shown in FIG. 2, the air release side shutter plate 26 and the air release side guide plate 25 for guiding the advance / retreat operation thereof are omitted from the configuration of the above-described embodiment described with reference to FIG. The sheet-like elastic material 41 is attached to the structure.

  The sheet-like elastic material 41 includes a section 43 formed in a rectangular shape by a U-shaped cut and a sheet main body 44 extending around the section. The bottom mold 2 is formed at four corners of the sheet main body. Bolt holes 40 a into which bolts (not shown) for fixing to the reinforced concrete frame 6 can be inserted are formed so as to be concentric with the bolt holes 40 of the upper plate 21, and the circular opening 27 and the connection port 28 are formed. In addition, a circular opening 42 constituting the injection port 3 is provided so as to be concentric with them.

  Here, the sheet-like elastic material 41 is configured to return from a state in which the section 43 is opened out of the surface of the sheet main body 44 to the same plane as the sheet main body 44 when the air bleeding member 10 is pulled out. When the pressure injection of the mortar is started, the section 43 is pushed open to the insertion hole 7 side by the air vent member 10 inserted through the air vent port 11 as shown in FIG. However, when the air bleeding member 10 is pulled out, as shown in FIG. 5 (c), in response to the pulling operation, the section 43 is pressed by the elastic restoring force and the pressing action of the mortar. 44 returns to the same plane. Incidentally, even if the slice 43 is subjected to the pressing action of the mortar, the force is generally supported by the upper plate 21, so there is no possibility of being pushed open to the opposite side.

  In the meantime, on the injection side, the injection side shutter plate 24 is moved back and forth to the open position so that the mortar can be pressurized and injected (FIGS. (B) and (c)), and the air vent member 10 is pulled out. Thereafter, as shown in FIG. 4D, the injection side shutter plate 24 is moved back and forth to the closed position to block the injection port 3 and prevent the mortar from flowing out from the insertion hole 7 through the injection port. .

  According to such a configuration, since the mortar outflow accompanying the extraction of the air bleed member 10 can be prevented simultaneously with the extraction operation, it is not necessary to separately receive the mortar flowing out through the air bleed port 11 with a bucket or the like.

  If there is a concern that the mortar slightly leaks through the U-shaped notch that separates the section 43 from the surrounding sheet body 44, the air vent port 11 is removed after the air vent member 10 is pulled out and removed. A known water-stopping measure may be taken as appropriate, for example, by sticking a water-stopping tape to the circular opening 31 of the lower plate 22 that is one of the above.

  In the above-described modification, the section 43 formed in a rectangular shape by the U-shaped cut is used as the section of the present invention. However, the method of forming the cut and the shape formed thereby are arbitrary, for example, radial. You may make it cut into. In this case, a section is composed of a plurality of triangular or fan-shaped pieces. FIG. 5 shows an example of a four-piece segment 43a by making a cross-shaped cut, and FIG. 6 shows an example of a two-piece segment 43b by making a straight cut. It is a thing.

  Further, instead of the sheet-like elastic material 41, a sheet-like elastic material 71 may be attached to the upper surface of the upper plate 21 as shown in FIG.

  The sheet-like elastic material 71 is configured by providing openings 72 that return from the expanded state to the contracted state when the inserted air vent member 10 is pulled out, and the bottom mold frame 2 is provided at the four corners. The bolt holes 40a through which bolts (not shown) for fixing to the bolts 6 are inserted are respectively formed so as to be concentric with the bolt holes 40 of the upper plate 21, and together with the circular openings 27 and the connection openings 28, A circular opening 42 constituting the inlet 3 is provided so as to be concentric with them.

  Here, in the situation where the sheet-like elastic material 71 is pressurized and injected with mortar, the opening 72 is in an expanded state by inserting the air vent member 10 as shown in FIG. However, after the air bleeding member 10 is pulled out, the opening 72 returns to the contracted state by its elastic restoring force and the pressing action of the mortar in response to the pulling operation as shown in FIG.

  Hereinafter, since the other actions relating to the sheet-like elastic material 71 are substantially the same as those of the sheet-like elastic material 41, the description thereof is omitted here.

  In the above-described modification, the air vent side blocking means of the present invention is configured by the sheet-like elastic material 41 and the sheet-like elastic material 71 instead of the air vent side shutter plate 26. Therefore, when there is a concern that mortar to the extent that a gap is generated in the insertion hole 7 may leak, the sheet-like elastic material 41 or the sheet-like elastic material 71 and the air vent side shutter plate 26 may be used in combination. .

  FIG. 8A shows a configuration in which a sheet-like elastic material 41 is attached to the upper surface of the upper plate 21 in addition to the configuration of the above-described embodiment described with reference to FIG.

  In such a modification, at the time when the pressure injection of the mortar is started, the section 43 is pushed toward the insertion hole 7 by the air vent member 10 inserted through the air vent 11 as shown in FIG. Although it is in an open state, when the air bleeding member 10 is pulled out, the section 43 is responsive to the pulling operation by the elastic restoring force and the pressing action of the mortar as shown in FIG. The state returns to the same plane as the sheet main body 44.

  Next, as shown in FIG. 4 (d), the air vent side shutter plate 26 is advanced to the closed position, and the air vent port 11 is closed by the vicinity 38 of the tip thereof, whereby the insertion hole through the air vent port 11 is inserted. Block mortar outflow from 7.

  In this way, the amount of mortar flowing out from the air vent 11 after the air vent member 10 is pulled out and removed can be reduced by the sheet-like elastic material 41, so that the mortar flowing out through the air vent 11 As a result, the flow of mortar from the air vent port 11 can be reliably prevented by the subsequent shut-off operation by the air vent side shutter plate 26.

  In the meantime, on the injection side, the injection side shutter plate 24 is moved back and forth to the open position so that continuous pressure injection of mortar is performed (FIGS. (B) to (d)), and the air release side shutter plate 26 is moved. After performing the shut-off operation of the air vent 11 by the above, the injection side shutter plate 24 is advanced and retracted to the closed position as shown in FIG. The mortar is prevented from flowing out from the insertion hole 7.

  In the present embodiment and its modification, the air vent side shutter plate 26, the sheet-like elastic material 41, or the sheet-like elastic material 71 is provided as the air vent side blocking means, but the air vent member 10 is not pulled out. If the mortar outflow through the air bleed member 10 is blocked by bending or sandwiching the air bleed member, the air bleed side blocking means described above may be omitted. It doesn't matter. Similarly, in this embodiment, the injection side shutter plate 24 is provided as the injection side blocking means. However, an injection hose as an injection member is interposed between the injection pipe 4 and the injection port 3, If the flow of the mortar through the injection hose is blocked by bending or sandwiching the injection hose, the above-described injection side blocking means may be omitted.

  FIG. 9 is a schematic view of a grout material filling system showing such a modification, in which both the air vent side blocking means and the injection side blocking means are omitted from the above-described embodiment, and the reinforced concrete frame 6 is substantially vertical. The bottom mold 81 is installed in the opening 8 of the insertion hole 7 formed upward, and the air vent 11 provided in the bottom mold is inserted into the bottom mold so that the upper end is located immediately below the uppermost part of the insertion hole 7. An air bleeding member 10, an injection hose 82 as an injection member connected to the injection port 3 provided in the bottom mold 81, an injection pipe 4 having one end connected to the injection hose, A pressurizing pump 5 connected to the other end of the injecting pipe, and with the shear reinforcement 9 inserted in the insertion hole 7 along the injecting pipe 4 and the injecting hose 82. Insert the mortar that has been pumped through the inlet 3 7, the reinforcing member 9 is integrated with the reinforced concrete frame 6 through the mortar filled in the insertion hole so that the reinforced concrete frame can be shear-reinforced. Is provided with a relief valve 13. When the pressure of the mortar in the injection pipe 4 exceeds a set value, the relief valve discharges a part of the mortar out of the injection pipe 4 and adds it. In addition to returning to the hopper 12 connected to the supply side of the pressure pump 5, when the pressure of the mortar in the injection pipe 4 returns to a set value or less, the entire amount of the mortar is pumped again toward the injection port 3. It has become.

  In the modified example shown in FIG. 9A, after waiting for the mortar to flow out from the air vent member 10, the air vent member is bent to block the internal flow path (FIG. 10B), The internal flow path is blocked by bending the injection hose 82 as shown in FIG.

  Even in such a configuration, there is a situation in which the pressure of the mortar rises in the injection pipe 4 due to the shut-off of the air vent member 10 and the injection hose 82. Can be prevented in advance, and when the air vent member 10 and the injection hose 82 are shut off, the pressurizing pump 5 operates continuously without being stopped. The point that there is no possibility that the mortar flows out of the air vent member 10 or the injection hose 82 before the blocking and a void is generated in the insertion hole 7 is the same as in the above embodiment.

  Further, in this embodiment, the grouting material outflow blocking from the insertion hole on the inlet side is performed by the preceding blocking. However, in the present invention, the blocking is not necessarily performed, and simultaneous blocking, that is, pressurization is performed. The pump may be stopped and the flow of grout material from the insertion hole may be blocked by using the inlet as a blocking portion in response to the stop.

  In this case, the mortar pressure does not increase in the injection member due to the blocking on the inlet side, but there is no difference that the mortar pressure increases in the injection member due to the blocking on the air vent side. The same effects as those of the embodiment are obtained.

  FIG. 10 shows the configuration of such a modified example, and the air bleeding side guide plate 25 for guiding the air bleeding side shutter plate 26 and its forward / backward movement from the configuration of the above-described embodiment described in FIG. The injection-side shutter plate 24 and the injection-side guide plates 23a and 23b for guiding the advance / retreat operation thereof are omitted, and the upper plate 21 that does not need to sandwich the injection-side shutter plate and the injection-side guide plate between the lower plate 22 is eliminated. On the other hand, a sheet-like elastic material 91 is attached to the upper surface of a mold plate 22a instead of the lower plate 22.

  The mold plate 22a has substantially the same configuration as the lower plate except that the corner plate of the lower plate 22 is not cut out at four corners, and the connection port 28 to which the injection pipe 4 is connected has an injection port. And a circular opening 31a as an air vent is formed.

  The sheet-like elastic material 91 includes a section 43 formed by a U-shaped cut, a section 92 also formed by a U-shaped cut, and a sheet main body 93 extending around them. Bolt holes 40a into which bolts (not shown) for fixing the mold plate 22a to the reinforced concrete frame 6 can be inserted are formed at the corners so as to be concentric with the bolt holes of the mold plate. It is.

  Here, the sheet-like elastic material 91 is configured to return from the state in which the section 43 is opened out of the surface of the sheet main body 93 to the same plane as the sheet main body 93 when the air bleeding member 10 is pulled out. Therefore, after functioning as an air vent side shut-off means and after stopping the pressurizing pump 5, the section 92 is changed from the state opened from the surface of the sheet body 93 to the same plane as the sheet body. It is configured to return, and is configured to be able to simultaneously shut off as described above.

  That is, at the time when the pressure injection of the mortar is started, the section 43 is pushed open to the insertion hole 7 side by the air vent member 10 inserted through the air vent 11 as shown in FIG. However, when the air bleeding member 10 is pulled out, as shown in FIG. 5C, in response to the pulling operation, the section 43 is attached to the sheet main body 93 by the elastic restoring force and the mortar pressing action. Return to the same plane. Incidentally, even if the slice 43 is subjected to the pressing action of the mortar, the force is generally supported by the mold plate 22a, so there is no possibility of being pushed open to the opposite side.

  During this time, on the injection side, the section 92 is pushed open to the insertion hole 7 side by the injection pressure of the mortar as shown in FIGS. After stopping the pressurizing pump 5 after the drawing operation, the section functions as a check valve that allows only the flow in the direction from the connection port 28 serving as the injection port to the insertion hole 7. (D), the elastic restoring force and the weight of the mortar return to the same plane as the sheet main body 93, and the connection port 28, which is an injection port, is cut off, as shown in FIG. The outflow of mortar from the insertion hole 7 through the inlet is prevented.

DESCRIPTION OF SYMBOLS 1 Grout material filling system 2 Bottom formwork 3 Inlet 4 Injection pipe (injection member)
5 Pressure pump 6 Reinforced concrete frame (reinforcement target part)
7 Insertion hole 9 Shear reinforcement (reinforcement means)
10 Air venting member 11 Air venting port 13 Relief valve (pressure adjusting means)
21 Upper plate 22 Lower plate 23a, 23b Injection side guide plate 24 Injection side shutter plate (injection side blocking means)
25 Air bleeding side guide plate 26 Air bleeding side shutter plate (Air bleeding side blocking means)
27 Circular opening (inlet)
28 Connection port (injection port)
29, 30, 31, 32
Circular opening (air vent)
41 Sheet-like elastic material (Air venting side blocking means)
42 Circular opening (inlet)
43 section 44 sheet main body 71 sheet-like elastic material 81 bottom mold frame 82 injection hose (injection member)

Claims (7)

An insertion hole is formed upward in a rock mass, a concrete frame or other part to be reinforced, and then the reinforcing means is inserted into the insertion hole, and the upper end is located immediately below the top of the insertion hole. The arrangement of the air bleed member is installed and the bottom mold is installed at the opening of the insertion hole in a form in which the air bleed member is inserted into the air vent of the bottom mold, and then the bottom mold In the grout material filling method for starting the injection of the grout material into the insertion hole by operating the pressurizing pump connected to the inlet through the injection member,
Waiting for the grout material to flow out from the air vent member after starting the injection of the grout material, the air vent member or the air vent port after the air vent member has been withdrawn is blocked The flow of the grouting material from the insertion hole is blocked, and then the pressure pump is stopped after the flow of the grouting material from the insertion hole is blocked using the injection port or the injection member as a blocking portion. Alternatively, while stopping the pressurizing pump and blocking the outflow of the grout material from the insertion hole by using the injection port as a blocking part in response to the stop, the injection is performed while the pressurizing pump is being operated. A method for filling a grout material, wherein the grout material is discharged to the outside of the pouring member when the pressure of the grout material in the member exceeds a set value. Placed in the insertion hole so that the reinforcing means can be inserted and placed in the bedrock, concrete frame and other parts to be reinforced, and placed at the opening of the insertion hole formed upward, with the upper end positioned directly below the top of the insertion hole A bottom mold frame provided with an air vent port through which an air vent member to be inserted is provided, and a pressurizing pump connected to the inlet port provided in the bottom mold frame via an injection member In grout filling system,
Blocking outflow of grout material from the insertion hole with the air vent after the air vent member or the air vent member has been pulled out as the shut-off site and the insertion with the injection port or the injection member as the shut-off site When the pressure of the grout material in the injection member exceeds a set value by blocking the outflow of the grout material from the hole, pressure adjusting means capable of discharging the grout material to the outside of the injection member A grout filling system characterized by being provided in The grout material filling system according to claim 2, further comprising an air vent side blocking means for blocking outflow of the grout material from the insertion hole with the air vent port as a blocking portion. It consists of a section formed by cutting and a sheet main body spreading around the section, and the section was opened out of the plane of the sheet main body by pulling out the air vent member inserted in such a manner that the section was pushed open. With extraction of the sheet-like elastic material configured to return to the same plane as the sheet main body from the state, or the air bleed member inserted in such a manner that the opening is provided and the opening is expanded 4. The grout material filling system according to claim 3, further comprising a sheet-like elastic material configured to return from the expanded state to the contracted state as the air vent side blocking means. An air vent side shutter plate configured to be movable forward and backward between a closed position that closes the air vent opening and an open position that moves forward or backward from the closed position to open the air vent opening is used as the air vent side blocking means. 5. The grout material filling system according to claim 3 or claim 4 provided. The grout material filling system according to claim 2 or 3, further comprising injection side blocking means for blocking outflow of the grout material from the insertion hole using the injection port as a blocking site under the operation of the pressurizing pump. An injection-side shutter plate configured to be movable back and forth between a closed position for closing the injection port and an open position for moving forward or backward from the closed position to open the injection port is provided as the injection-side blocking means. 6. The grout material filling system according to 6.

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