JP6883983B2 - Bottom formwork for filling grout material - Google Patents

Description

The present invention relates to a bottom form for filling grout material, which is mainly applied to filling a grout material into an insertion hole into which a shear reinforcing tool is inserted.

When constructing a reinforced concrete structure, shear reinforcements may be placed to support the out-of-plane shear force acting on the walls and the like that make up the structure, but higher shear strength is achieved by reviewing seismic standards. If shear strength is desired, shear reinforcement is required separately for existing reinforced concrete structures.

As a means for performing such shear reinforcement, for example, a seismic retrofitting method using a shear reinforcement tool called "multiple nut bar" (registered trademark) is known.

Such a shear reinforcing tool is composed of a PC steel rod and a disk-shaped or nut-shaped fixing member attached near both ends thereof. For example, when it is installed on the side wall of a box culvert, an insertion hole is inserted in the side wall. After forming a horizontal hole, the insertion hole is filled with a grout material, and then a shear reinforcing tool is inserted so as to be embedded in the grout material.

In this way, after the grout material has hardened, the grout material and the concrete skeleton around it are integrated, so that the inserted shear reinforcing tool acts on the side wall of the box culvert in the above example. It has a function of supporting the out-of-plane shear force or resisting the out-of-plane shear force.

On the other hand, when the part to be seismically reinforced is located above the top plate of the box formwork when viewed from the construction side, an upward insertion hole is formed in the upper part, and then shear reinforcement is performed in the insertion hole. Insert the tool and temporarily fix it, place the hollow air bleeding hose in the insertion hole so that the upper end is located just below the top of the insertion hole, and insert the air bleeding hose through the insertion hole. Close the lower end opening with the bottom formwork.

Next, the grout material is injected upward through the injection hose connected to the injection port of the bottom formwork, but if the grout material flows out from the air bleeding hose, it fills the insertion hole. Since it can be confirmed that the injection of the grout material is completed at this point, the injection of the grout material is completed.

In this way, even if the insertion hole is directed upward, the grout material can be filled without leaving a gap at the uppermost portion of the insertion hole.

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

Here, it is necessary to take appropriate outflow prevention measures so that the filled grout material does not flow out from the insertion hole and a gap is generated in the insertion hole, but the quality of shear reinforcement is improved on the air vent side. In order to prevent the air bleeding hose from being left behind, it is necessary to promptly close the air bleeding port after removing the air bleeding hose.

However, in the past, since there is no means for reliably and quickly closing the air bleeding port, it is possible to prevent a situation in which a gap is generated in the insertion hole by continuing the pressure injection of the grout material, but the work of closing the air bleeding port. If it takes a lot of time and effort, a large amount of grout material will flow out from the air vent, and there is a problem that it takes time and effort to process the grout material.

Further, on the injection port side, conventionally, the injection hose is bent and the bent portion is bound by a number line or the like, but with this method, the work is complicated and time-consuming, and the worker has experience or is familiar with it. Due to the difference in degree, the binding method varies, causing a problem that the grout material may flow out from the insertion hole.

In addition, if the pressure injection of grout material is unexpectedly interrupted due to a failure of the pressure pump or the injection hose falling off, the above-mentioned method of bending and binding the hoses can provide immediate response. difficult.

Therefore, a considerable amount of the injected grout material flows out from the insertion hole, and as a result, there is a problem that the pressure injection must be restarted from the beginning.

The present invention has been made in consideration of the above-mentioned circumstances, and provides a bottom form for filling grout material, which can reliably and quickly prevent the outflow of grout material from an insertion hole through an air vent or an injection port. The purpose is to do.

The present invention also provides a bottom form for filling grout material, which can prevent the grout material from flowing out from the insertion hole even when the pressure injection of the grout material is interrupted in an unexpected manner. The purpose.

In order to achieve the above object, the grout material filling bottom formwork according to the present invention is formed so that the reinforcing means can be inserted and arranged in the bedrock, the concrete skeleton and other parts to be reinforced as described in claim 1. An air bleeding port into which an air bleeding member installed in the opening of the inserted hole and arranged in the insertion hole so that the upper end is located immediately below the uppermost portion of the insertion hole and a grout material filled in the insertion hole. In the bottom form for filling grout material provided with an injection port to which an injection pipe for injecting concrete is connected.
An air bleeding side blocking means that blocks the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and a grout from the insertion hole by closing the injection port. It is provided with an injection side blocking means for blocking the outflow of the material, and the air bleeding side blocking means is provided with a closing position for closing the air bleeding port and an opening position for advancing or retreating from the closing position to open the air bleeding port. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the two, and the injection side blocking means is moved forward or backward from the closing position that closes the injection port and the closing position. The injection side shutter plate is arranged so as to be able to move forward and backward between the opening position and the opening position.
Further, the bottom mold for filling the grout material according to the present invention has two injection-side guide plates in which the injection-side shutter plate is arranged on each longitudinal side thereof and in the same plane as the injection-side shutter plate. At the same time, the connection port to which the injection pipe is connected is arranged so as to be sandwiched between the lower plate in which the connection port is provided and the upper plate in which the two circular openings are formed, and the injection side shutter plate and the injection side shutter plate are back-to-back. An air bleeding side guide plate into which the air bleeding side shutter plate is inserted is arranged in the lower plate so that one of the two circular openings and the connection port are concentric with each other as the injection port. The other circular opening, the circular opening formed on the injection side guide plate, the circular opening formed on the lower plate, and the circular opening formed on the air bleeding side guide plate are concentric with each other as the air bleeding port. The upper plate, the injection side guide plate, the lower plate, and the air bleeding side guide plate are connected to each other.

Further, as described in claim 3, the bottom form for filling the grout material according to the present invention has an insertion hole formed upward so that the reinforcing means can be inserted and arranged in the bedrock, the concrete skeleton and other parts to be reinforced. Note that the air bleeding port where the air bleeding member installed in the opening and arranged in the insertion hole so that the upper end is located just below the uppermost part of the insertion hole is inserted and the grout material filled in the insertion hole is injected. In the bottom form for filling grout material provided with an entrance,
An air bleeding side blocking means that blocks the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and a grout from the insertion hole by closing the injection port. It is provided with an injection side blocking means for blocking the outflow of the material, and the air bleeding side blocking means is provided with a closing position for closing the air bleeding port and an opening position for advancing or retreating from the closing position to open the air bleeding port. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the two, and the injection side blocking means is moved forward or backward from the closing position that closes the injection port and the closing position. The injection side shutter plate is arranged so that it can move forward and backward between the opening position and the opening position.
It consists of a section formed by a notch and a sheet body that spreads around the section, and the section is opened out of the plane of the sheet body as the air bleeding member is pulled out through the section so as to be pushed open. For pulling out a sheet-like elastic material configured to return from the state to a state of being substantially the same plane as the sheet body, or the air bleeding member inserted in a form in which an opening is provided and the opening is expanded. A sheet-shaped elastic material configured to return from the expanded state to the contracted state is provided as the air bleeding side blocking means .

Further, as described in claim 4, the bottom form for filling the grout material according to the present invention has an insertion hole formed upward so that the reinforcing means can be inserted and arranged in the bedrock, the concrete skeleton and other parts to be reinforced. Note that the air bleeding port where the air bleeding member installed in the opening and arranged in the insertion hole so that the upper end is located just below the uppermost part of the insertion hole is inserted and the grout material filled in the insertion hole is injected. In the bottom form for filling grout material provided with an entrance,
An air bleeding side blocking means that blocks the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and a grout from the insertion hole by closing the injection port. It is provided with an injection side blocking means for blocking the outflow of the material, and the air bleeding side blocking means is provided with a closing position for closing the air bleeding port and an opening position for advancing or retreating from the closing position to open the air bleeding port. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the two, and the injection side blocking means is moved forward or backward from the closing position that closes the injection port and the closing position. The injection side shutter plate is arranged so that it can move forward and backward between the opening position and the opening position.
It consists of a section formed by a notch and a sheet body that spreads around the section, and the section is opened to the outside of the surface of the sheet body by the injection pressure of the grout material, and is opened by the disappearance of the injection pressure. A sheet-like elastic material configured to return from the state to a closed state which is substantially the same plane as the sheet body, or an expanded state in which an opening is provided and the opening is expanded by the injection pressure of the grout material. At the same time, a sheet-like elastic material configured to return from the expanded state to the contracted state by the disappearance of the injection pressure is provided as the injection side blocking means .

In the bottom mold for filling the grout material according to the present invention, the air bleeding side blocking means for blocking the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and the injection port. The injection side blocking means for blocking the outflow of grout material from the insertion hole is provided by closing the air bleeding port, and the air bleeding side blocking means has a closing position for closing the air bleeding port and moving forward or backward from the closing position to bleed air. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the opening position where the mouth is opened, and the injection side blocking means advances or retracts from the closing position closing the injection port and the closing position. The injection side shutter plate is arranged so that the injection port can be moved forward and backward from the open position where the injection port is opened.

In this way, on the air bleeding port side, conventionally, there is no effective outflow prevention measure when the air bleeding member is pulled out, and the grout material is forced to flow out from the insertion hole through the air bleeding port. According to the present invention, the air bleeding port can be closed only by a short operation of moving the shutter plate on the air bleeding side forward or backward, and the operation does not require skill or proficiency.

Therefore, the outflow of the grout material from the insertion hole through the air vent can be quickly and surely prevented.

Further, even if the grout material flows out from the air bleeding port before the operation of the shutter plate on the air bleeding side, the outflow time can be suppressed in a short time, so it takes time to close the air bleeding port as in the conventional case. Therefore, there is no possibility that a large amount of grout material will flow out from the air vent, and if pressure injection of grout material is continued on the injection port side, the outflow will be promptly replenished and injected, resulting in a gap in the insertion hole. There is no risk of it occurring.

On the other hand, on the injection port side as well, the injection port can be closed only by a simple operation of moving the shutter plate on the injection side forward or backward, and the operation does not require skill or proficiency.

Therefore, the outflow of the grout material from the insertion hole through the injection port can be prevented more quickly and surely than the conventional outflow prevention measure in which the injection hose is bent and the bent portion is bound by a number wire or the like.

The part to be reinforced mainly corresponds to the concrete skeleton, especially the reinforced concrete skeleton, and the reinforcing means in that case includes a shear reinforcing member such as a shear reinforcing bar and a shear reinforcing tool represented by "multiple nut bar" (registered trademark). However, the combination of the reinforcement target part and the reinforcement means is arbitrary as long as the reinforcement means is inserted into the insertion hole formed upward and the grout material is filled in that state, for example, the ground such as rock. It can also be composed of a rock bolt or an anchor buried in the ground.

The insertion hole formed upward is the subject of the present invention, but upward does not mean only vertically upward, and when there is a risk of air remaining when the grout material is injected, that is, the opening position. It shall mean the case where the hole bottom position is higher than that.

The air bleeding member can be composed of a hose, a pipe, or the like, and the material thereof is also arbitrary.

The bottom form for filling grout material according to the present invention can be installed at a portion to be reinforced with its upper surface in contact with the peripheral edge of the opening of the insertion hole, and if necessary, at the peripheral edge of the opening of the insertion hole. It shall be possible to secure the liquidtightness at the contact point while adjusting the unevenness.

Here, as described above, the bottom mold for filling the grout material according to the present invention includes the air bleeding side blocking means in which the air bleeding side shutter plate is arranged, but separately from this, the section formed by the notch. And the sheet body that spreads around it, and the sheet body and the sheet body are opened from the state where the section is opened out of the plane of the sheet body as the air bleeding member is pulled out. A sheet-like elastic material configured to return to a state of being substantially the same flat surface, or the opening is expanded with the pulling out of the air bleeding member inserted in a form in which the opening is expanded. If a sheet-shaped elastic material configured to return to the contracted state is provided as an air bleeding side blocking means, from the time the air bleeding member is pulled out until the air bleeding side shutter plate is operated. During that time, the flow rate of the outflow of grout material through the air vent is significantly reduced.

Therefore, the processing of the grout material that flows out before the operation of the air bleeding side shutter plate is simplified, and the operation of the air bleeding side shutter plate after the air bleeding member is pulled out can be performed with a sufficient time.

On the other hand, as described above, the bottom mold for filling grout material according to the present invention is provided with an injection-side blocking means in which an injection-side shutter plate is arranged, but apart from this, a section formed by a notch and its surroundings are provided. The section is open to the outside of the surface of the sheet body due to the injection pressure of the grout material, and is substantially the same as the sheet body from the open state due to the disappearance of the injection pressure. A sheet-like elastic material configured to return to a flat closed state, or an opening is provided, and the opening is expanded by the injection pressure of the grout material, and the injection pressure disappears. If a sheet-shaped elastic material configured to return from the expanded state to the contracted state is provided as a blocking means on the injection side, the injection pressure of the grout material disappears with respect to the outflow of the grout material through the injection port. The flow rate is greatly reduced in response to.

Therefore, even when the pressure injection of grout material is unexpectedly interrupted due to a failure of the pressure pump or the injection hose falling off, the amount of outflow from the insertion hole through the injection port is kept to a minimum. Thus, unlike the conventional outflow prevention measures of bending and bundling the injection hose, it is possible to restart the pressurized injection from the injection situation at the time of interruption instead of restarting from the beginning.

The above-mentioned section is not necessarily limited as long as the adjacent portion is elastically deformed by making a cut and pushed open toward the insertion hole, and the cut open forms an insertion space for the air bleeding member at the cut portion. It is limited to the case where the shape of the cut is U-shaped, cross-shaped, C-shaped, etc., and the outline of the section formed by the cut is a surrounding shape such as a rectangular shape, a triangular shape (fan shape), or a semicircular shape. Even if it is a linear notch, the adjacent site shall be included as an intercept even if the adjacent site acts as described above.

The schematic view of the grout material filling system 1 in which the bottom form 2 for filling the grout material which concerns on 1st Embodiment is arranged. It is a perspective view of the bottom form 2 for filling grout material, (a) is an exploded view, and (b) is an overall view. Explanatory drawing which shows the operation of the bottom form 2 for filling grout material. The explanatory view which shows the operation of the bottom form 2 for filling a grout material continuously. The exploded perspective view of the bottom formwork 2a for filling grout material which concerns on 2nd Embodiment. Explanatory drawing which shows the operation of the bottom formwork 2a for filling grout material. The explanatory view which shows the operation of the bottom formwork 2a for filling a grout material continuously. It is an exploded perspective view of the bottom formwork 2b for filling a grout material which concerns on a modification. The perspective view which showed the action which concerns on the modification of the sheet-shaped elastic material 41a. Similarly, the perspective view which showed the action which concerns on the modification of the sheet-shaped elastic material 41a. Similarly, the perspective view which showed the action which concerns on the modification of the sheet-shaped elastic material 41a. The exploded perspective view of the bottom formwork 2c for filling grout material which concerns on 3rd Embodiment. Similarly, an overall perspective view of the bottom formwork 2c for filling grout material. Explanatory drawing which shows the operation of the bottom formwork 2c for filling grout material. It is explanatory drawing which shows another action of the bottom formwork 2c for filling a grout material, (a) is a vertical detailed sectional view, and (b) is a horizontal sectional view along the line AA.

Hereinafter, embodiments of the bottom form for filling grout material according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a schematic view of a grout material filling bottom form 2 according to the present embodiment and a grout material filling system 1 in which the bottom form 2 is arranged. As shown in the figure, the grout material filling system 1 is applied to seismic reinforcement with the reinforced concrete skeleton 6 as the reinforcement target portion, and the opening of the insertion hole 7 formed in the reinforced concrete skeleton substantially vertically upward. The grout material filling bottom mold 2 installed in No. 8 and the pressurizing pump 5 connected to the injection port 3 provided in the grout material filling bottom mold via the injection pipe 4 are provided. With the shear reinforcing tool 9 as a reinforcing means inserted and arranged in the insertion hole 7, the mortar as a grout material pumped from the pressurizing pump 5 along the injection pipe 4 is inserted from the injection port 3 into the insertion hole 7. By injecting, the shear reinforcing tool 9 is integrated with the reinforced concrete skeleton 6 via the mortar filled in the insertion hole, and the reinforced concrete skeleton can be shear-reinforced.

As shown in the figure, for example, the shear reinforcing tool 9 may be composed of a rod-shaped PC steel rod and a pair of fixing nuts screwed to each end of the PC steel rod.

The bottom mold 2 for filling the grout material is provided with an air bleeding port 11 along with the injection port 3, and an air bleeding member 10 is provided at the air bleeding port so that the upper end is located directly below the uppermost portion of the insertion hole 7. By inserting the mortar, when the mortar is pressurized and injected, the air in the insertion hole 7 is expelled from the insertion hole through the air bleeding member 10, and when the mortar flows out from the lower end of the air bleeding member 10, the insertion hole is inserted. It is possible to confirm that the mortar has been injected to just below the uppermost portion of the insertion hole 7, that is, the mortar has been injected into every corner without leaving a gap in the insertion hole 7.

The air bleeding member 10 and the injection pipe 4 may be made of any material, but may be made of, for example, a resin pipe or hose.

FIG. 2 shows the bottom formwork 2 for filling the grout material with an exploded perspective view and an overall perspective view in a state where the assembly is completed. As can be seen from these figures, the grout material filling bottom form 2 includes a lower plate 22 in which a connection port 28 to which the injection pipe 4 is connected is projected downward, an injection side shutter plate 24, and the injection side. Two injection-side guide plates 23a and 23b arranged on each longitudinal side of the injection-side shutter plate so as to be in the same plane as the shutter plate, and an upper plate 21 having two circular openings 27 and 29 formed therein. Are laminated so that the injection side shutter plate 24 and the two injection side guide plates 23a and 23b are sandwiched between the lower plate 22 and the upper plate 21, and the air bleeding side guide is placed on the lower surface of the lower plate 22. By arranging the plate 25, the circular opening 27 of the upper plate 21 and the connection port 28 of the lower plate 22 are concentric with each other, and the circular opening 29 of the upper plate 21 and the circular opening 30 formed in the injection side guide plate 23a and the lower plate The circular openings 31 formed in the air bleeding side guide plate 25 and the circular openings 32 formed in the air bleeding side guide plate 25 are positioned so as to be concentric with each other, and the bolt holes 33a, 33a formed in the air bleeding side guide plate 25, The bolts 37a and 37a are inserted into the bolt holes 34a and 34a formed in the lower plate 22 and the bolt holes 35a and 35a formed in the injection side guide plate 23a and screwed into the bolt holes 36a and 36a of the upper plate 21. At the same time, 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 and screwed into the bolt holes 36b and 36b of the upper plate 21. They are interconnected together.

Here, the circular opening 27 of the upper plate 21 and the connection port 28 of the lower plate 22 constitute the above-mentioned injection port 3, the circular opening 29 of the upper plate 21, the circular opening 30 provided in the injection side guide plate 23a, and the lower stage. 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 above-mentioned air bleeding port 11.

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

The air bleeding side shutter plate 26 is guided along the direction of the arrow in the figure by the air bleeding side guide plate 25, and the closed position (one-dot chain line in the figure) and the closed position that close the air bleeding port 11 at the portion near the tip thereof 38. It is configured so that it can move back and forth from the opening position (solid line in the figure) to open the air bleeding port 11 by retreating to the right in the figure, and at the closed position, from the insertion hole 7 through the air bleeding port 11. It functions as an air bleeding side blocking means for blocking the outflow of mortar.

On the other hand, the injection side shutter plate 24 is sandwiched between the injection side guide plates 23a and 23b arranged on the longitudinal side thereof, respectively, and while being guided by the injection side guide plate along the direction of the arrow in the figure, the injection side. The circular opening 33 formed in the shutter plate is displaced from the injection port 3 as a whole to close the injection port (one-dot chain line in the figure) and moves to the left side in the same figure from the closing position (from the left side). Since the circular opening 33 is concentric with the injection port 3 (retracts when viewed), it is configured to be able to move forward and backward from the open position (solid line in the figure) in which the injection port is opened. It functions as an injection side blocking means for blocking the outflow of mortar from the insertion hole 7 through 3.

The injection-side shutter plate 24 has bent portions 39a and 39b provided on the short side edges thereof in contact with the opposite edges of the lower plate 22, so that the injection-side guide plates 23a and 23b can be squeezed from between the injection-side guide plates 23a and 23b. Alternatively, it is designed to prevent slipping out or falling out from between the upper plate 21 and the lower plate 22, but it moves to the left side of the figure and the bent portion 39a is located at a position where the circular opening 33 is concentric with the injection port 3. Is in contact with the edge of the lower plate 22, and is configured so that the bent portion 39b abuts on the edge of the lower plate 22 at a position where the circular opening 33 moves to the right side of the figure and the circular opening 33 is totally removed from the injection port 3. Since the bent portions 39a and 39b function as stoppers, respectively, it is possible to easily switch between the opening operation and the blocking operation at the injection port 3.

Bolt holes 40 are formed at each of the four corners of the upper plate 21, and the bottom formwork 2 for filling the grout material is formed into a reinforced concrete skeleton by using bolts (not shown) inserted through the bolt holes. In addition to being able to be fixed to 6, the lower plate 22 is formed with notches at its four corners so as not to interfere with the fixing work.

In order to fill the insertion hole 7 with mortar using the grout material filling bottom formwork 2 according to the present embodiment, first, the insertion hole 7 is formed upward in the reinforced concrete skeleton 6.

Next, the insertion arrangement of the shear reinforcing tool 9 into the insertion hole 7, the insertion arrangement of the air bleeding member 10 into the insertion hole with the upper end located directly below the uppermost portion of the insertion hole 7, and the grout of the air bleeding member 10. The grout material filling bottom form is installed in the opening of the insertion hole 7 in the form of being inserted into the air vent 11 of the material filling bottom form 2 in an arbitrary order.

Specifically, for example, after the shear reinforcing tool 9 is inserted into the insertion hole 7 and temporarily fixed, the air bleeding member 10 is attached to the grout material filling bottom form 2 in advance, and then the grout material filling bottom form 2 is attached. While lifting 2, the air bleeding member 10 attached to the insertion hole 7 is inserted into the insertion hole 7, and when the upper surface of the bottom form for filling the grout material comes into contact with the opening peripheral edge of the insertion hole 7, in that state, 4 of the upper plate 21 The bottom formwork 2 for filling the grout material may be installed in the opening of the insertion hole 7 by inserting the bolt into the bolt holes 40 formed in the corners and fixing the tip to the reinforced concrete skeleton 6. ..

Next, as shown in FIG. 3A, injection of mortar into the insertion hole 7 is started by operating the pressurizing pump 5 which is connected to the injection port 3 of the bottom mold 2 for filling the grout material. Then, after the start of the injection, the mortar is waited for to flow out from the air bleeding member 10 (FIG. 4B), and the air bleeding member is withdrawn from the air bleeding port 11 (FIG. 4A).

Here, the pressurizing pump 5 has been continuously operating during and after the drawing of the air bleeding member 10 since the start of injecting the mortar into the insertion hole 7 by the start, and the pressurizing pump 5 is inserted into the insertion hole 7. Even if the air bleeding member 10 is pulled out, the amount of mortar corresponding to the volume reduction is promptly replenished by the pressurizing pump 5, and there is no possibility that a gap is formed in the insertion hole 7.

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

Next, the injection side shutter plate 24 is moved back and forth to the closed position by hitting the bent portion 39b with, for example, a hammer (forward when viewed from the left side in FIG. 2 and backward when viewed from the right side), and the circular opening 33 is noted. By shifting from the inlet 3 as a whole, the outflow of mortar from the insertion hole 7 through the injection port 3 is blocked.

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

As described above, according to the grout material filling bottom formwork 2 according to the present embodiment, the air bleeding port 11 can be closed and the air bleeding port 11 can be closed only by a short operation of advancing the air bleeding side shutter plate 26. No skill or proficiency is required for the operation.

Therefore, it is possible to quickly and surely prevent the mortar from flowing out from the insertion hole 7 through the air vent 11.

Further, even if the mortar flows out from the air bleeding port 11 before the operation of the air bleeding side shutter plate 26, the outflow time can be suppressed in a short time. There is no risk of a large amount of mortar flowing out from the air vent, and if pressure injection of mortar is continued on the side of the injection port 3, the outflow will be promptly replenished and injected. There is no risk of voids being generated in the mortar.

On the other hand, even on the injection port 3 side, the injection port 3 can be closed only by a simple operation of moving the injection side shutter plate 24 forward or backward, and the operation does not require skill or proficiency. ..

Therefore, the outflow of mortar from the insertion hole 7 through the injection port 3 can be prevented more quickly and reliably than the conventional outflow prevention measure in which the injection hose is bent and the bent portion is bound by a number wire or the like. ..

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

Further, in the present embodiment, the grout material filling bottom form 2 is used in the form of being incorporated into the grout material filling system 1, but the grout material filling bottom form according to the present invention is used in combination with a pressure pump. Is not essential, for example, it can be used in a system in which a grout material is injected by pressurization using a head difference.

In this case, the injection pipe 4 is connected to the storage tank for storing the grout material in place of the pressurizing pump 5, and the storage tank is installed so as to be higher than the uppermost portion of the insertion hole 7. do it.

[Second Embodiment]
Next, the bottom form for filling the grout material according to the second embodiment will be described. The same parts and the like as in the first embodiment are designated by the same numbers, and the description thereof will be omitted.

FIG. 5 is an exploded perspective view showing the grout material filling bottom formwork 2a according to the second embodiment, and is a form instead of the grout material filling bottom formwork 2 and is filled with the grout material as in the first embodiment. It shall be used in system 1.

As shown in the figure, the grout material filling bottom formwork 2a is attached to the upper surface of the grout material filling bottom formwork 2 according to the first embodiment and the upper plate 21 of the grout material filling bottom formwork. The bottom form 2 for filling the grout material is provided with the air bleeding side blocking means and the sheet-shaped elastic material 41 as the injection side blocking means, and the description thereof will be omitted here.

The sheet-shaped elastic material 41 is composed of a section 43 and a section 45 formed in a rectangular shape by a U-shaped notch, and a sheet body 44 extending around them. Bolt holes 40a through which bolts (not shown) for fixing the bottom formwork 2a for filling grout material to the reinforced concrete skeleton 6 can be inserted are formed so as to be concentric with the bolt holes 40 of the upper plate 21. ..

Here, the sheet-shaped elastic material 41 is generally different from the sheet body from the state in which the section is opened out of the plane of the sheet body 44 as the air bleeding member 10 inserted so that the section 43 is pushed open is pulled out. It is configured to return to the same flat state, and the intercept 45 is opened to the outside of the surface of the sheet body 44 by the injection pressure of the mortar, and the open state is released by the disappearance of the injection pressure. It is configured to return to the closed state which is substantially the same plane as the seat body 44.

In order to fill the insertion hole 7 with mortar using the grout material filling bottom formwork 2a according to the present embodiment, the shear reinforcing tool 9 is formed in the insertion hole 7 formed upward in the reinforced concrete skeleton 6 as in the first embodiment. And the bottom formwork 2a for filling the grout material is installed in the opening 8 of the insertion hole 7, and the upper end of the air vent 11 of the bottom formwork for filling the grout material is directly below the uppermost part of the insertion hole 7. The air bleeding member 10 is inserted so as to be positioned.

Next, by operating the pressurizing pump 5 which is connected to the injection port 3 of the bottom form 2a for filling the grout material, the injection of mortar into the insertion hole 7 is started as shown in FIG. 6A. To do.

At this time, on the side of the air bleeding port 11, the section 43 is opened outside the surface of the sheet body 44 by the air bleeding member 10 inserted through the air bleeding port, and the section 45 is also on the side of the injection port 3. Due to the injection pressure of the mortar, the seat body 44 is opened to the outside of the surface.

Next, when the mortar flows out from the air bleeding member 10, the air bleeding member is pulled out from the air bleeding port 11 (FIG. (B)).

In this way, as the air bleeding member 10 is pulled out, the section 43 returns from the state of being opened out of the plane of the sheet body 44 to a state of being substantially the same plane as the sheet body.

Here, a slight gap is generated between the section 43 and the sheet body 44 due to the sand content in the mortar entering below the section 43, and the mortar slightly flows out through this gap, so that air is bleeded. It is difficult to completely block the mortar outflow through the mouth 11 by the intercept 43, but at least its flow rate can be significantly reduced.

On the other hand, since the pressurization of the mortar is continued on the side of the injection port 3, the section 45 is maintained in an open state open to the outside of the surface of the sheet body 44 by the injection pressure.

Since the pressurization of the mortar is continued as described above, even if the air bleeding member 10 is pulled out, the amount of mortar corresponding to the volume reduction is promptly replenished by the pressurizing pump 5, and after the pulling out, the mortar is quickly replenished. Since the slight outflow that occurs is also replenished in the same manner, there is no possibility that a gap will be formed in the insertion hole 7.

Next, as shown in FIG. 3C, the air bleeding side shutter plate 26 is advanced to the closed position, and the air bleeding port 11 is closed at the portion near the tip thereof, so that the insertion hole through the air bleeding port is inserted. Block the outflow of mortar from 7.

Next, the injection side shutter plate 24 is moved back and forth to the closed position by hitting the bent portion 39b with, for example, a hammer (forward when viewed from the left side in FIG. 2 and backward when viewed from the right side), and the circular opening 33 is noted. By shifting from the inlet 3 as a whole, the outflow of mortar from the insertion hole 7 through the injection port 3 is blocked.

Here, the section 45 on the injection port side is closed so that the injection pressure of the mortar on the section does not act due to the operation of advancing and retreating the shutter plate 24 on the injection side to the closing position, so that the section 45 has substantially the same plane as the sheet body 44. Return to the state.

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

As described above, according to the grout material filling bottom formwork 2a according to the present embodiment, in addition to the action and effect of the grout material filling bottom formwork 2 described in the first embodiment, the air bleeding member 10 is provided. From the time of pulling out to the operation of the air bleeding side shutter plate 26, the outflow flow rate of the mortar through the air bleeding port 11 can be significantly reduced, and thus the mortar flows out by the time the air bleeding side shutter plate 26 is operated. The processing of the mortar is simplified, and the operation of the air bleeding side shutter plate 26 after the air bleeding member 10 is pulled out can be performed with a sufficient time.

Further, according to the bottom mold 2a for filling the grout material according to the present embodiment, the sheet-shaped elastic material 41 is in an open state in which the section 45 is opened out of the plane of the sheet body 44 by the injection pressure of the mortar. Since the open state is restored to the closed state which is substantially the same plane as the seat body 44 by the disappearance of the injection pressure, the section 45 functions as a check valve and the pressurizing pump 5 operates normally. In this situation, as shown in FIG. 7A, the section 45 is opened by the injection pressure of the mortar to enable the injection of the mortar, while the injection is performed due to the malfunction of the pressurizing pump 5 or the dropping of the injection pipe 4. When the pressure disappears, the section 45 closes and the mortar outflow is restricted as shown in FIG.

Therefore, even when the pressure injection of the mortar is unexpectedly interrupted due to the failure of the pressure pump 5 or the dropping of the injection pipe 4, the amount of outflow from the insertion hole 7 through the injection port 3 is the minimum. By quickly pulling out the air bleeding member 10 and operating the air bleeding side shutter plate 26, the amount of mortar flowing out from the insertion hole 7 is minimized even on the air bleeding port 11 side. Therefore, it is not necessary to restart the pressurized injection of mortar from the beginning as in the conventional case, and it is possible to restart from the injection situation at the time of interruption.

If the top end of the injected mortar is lower than the upper end of the air bleeding member 10, it is not necessary to pull out the air bleeding member 10.

In the present embodiment, the case where the grout material is a mortar is taken as an example, but as in the first embodiment, various grout materials such as other hydraulic materials can be used instead of the mortar, and the grout can be used. It is also possible to use the material filling bottom mold 2a in a system for injecting grout material by pressurization using, for example, a head difference, instead of using it in combination with a pressurizing pump. Hereinafter, the content thereof is almost the same as that of the first embodiment, and thus the description thereof will be omitted here.

Further, in the present embodiment, the sheet-shaped elastic material of the present invention is composed of the sheet-shaped elastic material 41 including both the air bleeding side blocking means and the injection side blocking means, but the sheet-shaped elastic material of the present invention is air. The bleeding side blocking means or the injection side blocking means can be independently configured. For example, as shown in FIG. 8, a sheet-shaped elastic material 41a as the air bleeding side blocking means may be used.

The grout material filling bottom formwork 2b shown in the figure is the air attached to the upper surface of the grout material filling bottom formwork 2 and the upper plate 21 of the grout material filling bottom formwork according to the first embodiment. The bottom form 2 for filling the grout material is provided with the sheet-shaped elastic material 41a as the punching side blocking means, and the description thereof will be omitted here.

The sheet-shaped elastic material 41a is composed of a section 43 formed in a rectangular shape by a U-shaped notch and a sheet body 44 extending around them, and the four corners of the sheet body are filled with grout material. Bolt holes 40a through which bolts (not shown) for fixing the bottom formwork 2b to the reinforced concrete skeleton 6 can be inserted are formed so as to be concentric with the bolt holes 40 of the upper plate 21, and are circular. Along with the opening 27 and the connection port 28, a circular opening 42 constituting the injection port 3 is provided so as to be concentric with them.

In such a modification, the description is omitted here because it is as described in the second embodiment on the side of the air bleeding port 11 and in the first embodiment on the side of the injection port 3.

In the case of a single configuration of the injection side blocking means, in the sheet-shaped elastic material 41 shown in FIG. 5, instead of the section 43, an air is provided through a circular opening through which the air bleeding member 10 is inserted at the section position. It may be provided as one of the outlets 11 and configured.

Further, in the present embodiment and the above-described modification, the section 43, the section 45, or both of the sections 43, 45, or both formed into a rectangular shape by the U-shaped notch are used as the sections of the present invention. The shape formed by is arbitrary, and may be made, for example, radially cut. In this case, the section is composed of a plurality of pieces having a triangular shape or a fan shape.

FIG. 9 shows an example in which a section 43a composed of four pieces is formed by making a cross-shaped cut, and FIG. 10 shows an example in which a section 43b consisting of two pieces is formed by making a cut in a straight line. It is. Further, instead of the sheet-shaped elastic material 41, the sheet-shaped elastic material 71 may be attached to the upper surface of the upper plate 21 as shown in FIG.

The sheet-shaped elastic material 71 is configured to be provided with an opening 72 that returns from the expanded state to the contracted state when the inserted air bleeding member 10 is pulled out, and the bottom form 2 is formed in a reinforced concrete skeleton at four corners. Bolt holes 40a through which bolts for fixing to 6 (not shown) are inserted are formed so as to be concentric with the bolt holes 40 of the upper plate 21, and are noted together with the circular opening 27 and the connection port 28. Circular openings 42 constituting the entrance 3 are provided so as to be concentric with them.

Here, in the situation where the sheet-shaped elastic material 71 is pressure-injected with mortar, the opening 72 is expanded by inserting the air bleeding 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 pressurizing action of the mortar in response to the pulling operation as shown in FIG.

Hereinafter, other actions relating to the sheet-shaped elastic material 71 are substantially the same as those of the sheet-shaped elastic material 41, and thus the description thereof will be omitted here.

The modified examples of FIGS. 9 to 11 are examples configured as modified examples of the section 43, but these configurations can be applied as modified examples of the section 45.

[Third Embodiment]
Next, the bottom form for filling the grout material according to the third embodiment will be described. The same parts and the like as in the first and second embodiments are designated by the same numbers, and the description thereof will be omitted.

FIG. 12 is an exploded perspective view showing the grout material filling bottom formwork 2c according to the third embodiment, and FIG. 13 is an overall perspective view of the same completed assembly, in which the grout material filling bottom formwork 2 is used. Alternatively, it shall be used in the grout material filling system 1 as in the first embodiment.

As shown in these figures, the grout material filling bottom formwork 2c includes a lower plate 22 in which a connection port 28 to which the injection pipe 4 is connected is projected downward, an injection side shutter plate 24a, and the injection side. Two injection-side guide plates 23c and 23d arranged on each longitudinal side of the injection-side shutter plate so as to be in the same plane as the shutter plate, and two intermediate plates 21a having a slack opening 81 formed therein. The upper plate 86 on which the circular openings 88 and 89 are formed is sandwiched between the injection side shutter plate 24a and the two injection side guide plates 23c and 23d between the lower plate 22 and the intermediate plate 21a, and the upper plate 86 The air bleeding side guide plate 25 is arranged on the lower surface of the lower plate 22 so that the circular openings 88 of the upper plate 86 and the connection port 28 of the lower plate 22 are concentric with each other, and the upper plate The circular opening 89 of 21 and 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 formed in the air bleeding side guide plate 25. Bolt holes 33a, 33a, bolt holes 34a, 34a formed in the lower plate 22, bolt holes 35a, 35a formed in the injection side guide plate 23c, and bolt holes 36a, 36a formed in the intermediate plate 21a. 37a, 37a is inserted and screwed into the bolt holes 87a, 87a of the upper plate 86, and the bolt holes 34b, 34b formed in the lower plate 22, the bolt holes 35b, 35b formed in the injection side guide plate 23d, and the bolt holes 35b, 35b. The bolts 37b and 37b are inserted into the bolt holes 36b and 36b formed in the intermediate plate 21a and screwed into the bolt holes 87b and 87b of the upper plate 86 to be interconnected.

Further, on the lower surface of the upper plate 86, circular openings 84 and 85 positioned concentrically are formed in the circular openings 88 and 89, respectively, so that a daruma-shaped seal holding member 82 can be screwed. The seal holding member is fitted into the daruma-shaped opening 81 of the intermediate plate 21a with the annular seal member 83 wound around the peripheral edge thereof.

Here, the circular opening 88 of the upper plate 86, the circular opening 84 of the seal holding member 82, and the connection port 28 of the lower plate 22 constitute the injection port 3 described above, and the circular opening 89 of the upper plate 86 and the seal holding member 82 The circular opening 85, the circular opening 31 provided in the lower plate 22, and the circular opening 32 provided in the air bleeding side guide plate 25 constitute the above-mentioned air bleeding port 11.

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

The air bleeding side shutter plate 26 is guided along the direction of the arrow in the figure by the air bleeding side guide plate 25, and the closed position (one-dot chain line in the figure) and the closed position that close the air bleeding port 11 at the portion near the tip thereof 38. It is configured so that it can move back and forth from the opening position (solid line in the figure) to open the air bleeding port 11 by retreating to the right in the figure, and at the closed position, from the insertion hole 7 through the air bleeding port 11. It functions as an air bleeding side blocking means for blocking the outflow of mortar.

On the other hand, the injection side shutter plate 24a is sandwiched between the injection side guide plates 23c and 23d arranged on the longitudinal side thereof, respectively, and while being guided by the injection side guide plate along the direction of the arrow in the figure, the injection side. The circular opening 33 formed in the shutter plate is displaced from the injection port 3 as a whole to close the injection port (one-dot chain line in the figure) and moves to the left side in the same figure from the closing position (from the left side). Since the circular opening 33 is concentric with the injection port 3 (retracts when viewed), it is configured to be able to move forward and backward from the open position (solid line in the figure) in which the injection port is opened. It functions as an injection side blocking means for blocking the outflow of mortar from the insertion hole 7 through 3.

Here, the injection side shutter plate 24a is provided with a circular opening 30a through which the air bleeding member 10 is inserted as described above, and when the injection side shutter plate 24a advances and retreats to the closed position, the circular opening 30a also bleeds air. Although it deviates from the port 11, at the stage of operating the injection side shutter plate 24a, the air bleeding port 11 is already blocked by the air bleeding side shutter plate 26, so the air bleeding port 11 is blocked by operating the injection side shutter plate 24a. Not done. The reason why the circular opening 30a is provided not on the injection side guide plate 23c but on the injection side shutter plate 24a will be described in detail later.

The injection side shutter plate 24a is formed from between the injection side guide plates 23c and 23d by the bent portions 39a and 39b provided on the short side edge portions of the injection side shutter plate 24a contacting the opposite edge portions of the lower plate 22, respectively. Alternatively, it is designed to prevent slipping out or falling out from between the intermediate plate 21a and the lower plate 22, but it moves to the left side of the figure and the bent portion 39a is located at a position where the circular opening 33 is concentric with the injection port 3. Is in contact with the edge of the lower plate 22, and is configured so that the bent portion 39b abuts on the edge of the lower plate 22 at a position where the circular opening 33 moves to the right side of the figure and the circular opening 33 is totally removed from the injection port 3. Since the bent portions 39a and 39b function as stoppers, respectively, it is possible to easily switch between the opening operation and the blocking operation at the injection port 3.

Bolt holes 40 are formed in the four corners of the intermediate plate 21a and the four corners of the upper plate 86, respectively, and grout is used by using bolts (not shown) inserted through the bolt holes. The bottom formwork 2 for filling materials can be fixed to the reinforced concrete skeleton 6, and notches are formed at each of the four corners of the lower plate 22 so as not to interfere with the fixing work. ..

In order to fill the insertion hole 7 with mortar using the grout material filling bottom formwork 2c according to the present embodiment, the insertion hole 7 formed upward in the reinforced concrete skeleton 6 is shear-reinforced as in the first and second embodiments. In addition to arranging the tool 9, a bottom form 2c for filling the grout material is installed in the opening 8 of the insertion hole 7, and the upper end of the air vent 11 of the bottom form for filling the grout material is the uppermost portion of the insertion hole 7. The air bleeding member 10 is inserted so as to be located directly below.

Next, as shown in FIG. 14A, injection of mortar into the insertion hole 7 is started by operating the pressurizing pump 5 which is connected to the injection port 3 of the bottom form 2c for filling the grout material. Then, after the injection is started, the air bleeding member is pulled out from the air bleeding port 11 after waiting for the mortar to flow out from the air bleeding member 10.

Here, the pressurizing pump 5 has been continuously operating during and after the drawing of the air bleeding member 10 since the start of injecting the mortar into the insertion hole 7 by the start, and the pressurizing pump 5 is inserted into the insertion hole 7. Even if the air bleeding member 10 is pulled out, the amount of mortar corresponding to the volume reduction is promptly replenished by the pressurizing pump 5, and there is no possibility that a gap is formed in the insertion hole 7.

Next, the air bleeding side shutter plate 26 is advanced to the closed position ((b) in the figure), and the air bleeding port 11 is closed at the portion near the tip thereof, so that the air bleeding port 11 is inserted through the air bleeding port 7. Block the outflow of mortar (Fig. (C)).

Next, the injection side shutter plate 24a is moved back and forth to the closed position by hitting the bent portion 39b with, for example, a hammer (forward when viewed from the left side of FIG. 12, backward when viewed from the right side), and the circular opening 33 is noted. By shifting the entire port from the inlet 3, the outflow of mortar from the insertion hole 7 through the injection port 3 is blocked (Fig. (D)).

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

As described above, according to the bottom mold 2c for filling the grout material according to the present embodiment, the same action and effect as those described in the first embodiment are obtained, and as shown in FIG. 15, the annular seal member 83 is provided. Since the upper surface thereof abuts on the lower surface of the upper plate 86 and the lower surface slidably abuts on the upper surface of the injection side shutter plate 24a, it is sandwiched between the upper plate and the injection side shutter plate. The mortar that has flowed through the circular openings 88 and 89 of the upper plate 86 and further has flowed into the circular openings 84 and 85 of the seal holding member 82 is annular when the injection side shutter plate 24a advances and retreats to the closed position. The sealing member 83 and the injection side shutter plate 24a block the flow in the horizontal radial direction and below, thus reliably preventing mortar leakage from the insertion hole 7 after filling is completed.

Further, since the movement of the annular seal member 83 in the contraction direction is restricted by the seal holding member 82 and the movement in the expansion direction is restricted by the inner peripheral edge of the daruma-shaped opening 81 of the intermediate plate 21a, the injection side is on the lower surface thereof. Even if the sliding action of the shutter plate 24a is added, the initial arrangement shape is maintained, and there is no possibility that the liquidtight function is impaired.

As described above, the injection side shutter plate 24a not only fulfills the function of closing the injection port 3, but also fulfills the liquid-tight function of more reliably preventing the outflow of mortar together with the annular seal member 83 and the like. A circular opening 30a for inserting the air bleeding member is required so that the air bleeding port 11 can be closed at the closed position and the air bleeding member 10 is not interfered with at the retracted position.

Incidentally, when the widths of the injection side guide plate 23c and the injection side shutter plate 24a are adjusted and the circular opening 30a is provided in the injection side guide plate 23c (see the first embodiment), the annular seal member 83 is injected. Since the side guide plate 23c and the injection side shutter plate 24a are straddled, mortar may flow out from the gaps between them, making it difficult to ensure high liquidtightness.

2 Bottom formwork for filling grout material 3 Injection port 4 Injection piping 6 Reinforced concrete skeleton (part to be reinforced)
7 Insertion hole 8 Opening 9 Shear reinforcement (reinforcing means)
10 Air bleeding member 11 Air bleeding port 26 Air bleeding side shutter plate (air bleeding side shutoff means)
24 Injection side shutter plate (injection side blocking means)
41 Sheet-shaped elastic material (air bleeding side blocking means and injection side blocking means)
41a Sheet-shaped elastic material (air bleeding side blocking means)
71 Sheet-shaped elastic material (air bleeding side blocking means)

Claims (4)

It is installed in the opening of the insertion hole formed upward so that the reinforcing means can be inserted and placed in the bedrock, concrete skeleton and other parts to be reinforced, and placed in the insertion hole so that the upper end is located just below the uppermost part of the insertion hole. In the grout material filling bottom formwork provided with an air bleeding port through which the air bleeding member is inserted and an injection port to which an injection pipe for injecting the grout material to be filled in the insertion hole is connected.
An air bleeding side blocking means that blocks the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and a grout from the insertion hole by closing the injection port. It is provided with an injection side blocking means for blocking the outflow of the material, and the air bleeding side blocking means is provided with a closing position for closing the air bleeding port and an opening position for advancing or retreating from the closing position to open the air bleeding port. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the two, and the injection side blocking means is moved forward or backward from the closing position that closes the injection port and the closing position. A bottom form for filling grout material, characterized in that the injection side shutter plate is arranged so as to be able to move forward and backward between the open position and the open position. A connection port to which the injection pipe is connected is provided together with two injection side guide plates arranged so that the injection side shutter plate is arranged on each longitudinal side thereof and in the same plane as the injection side shutter plate. The lower plate is arranged so as to be sandwiched between the lower plate and the upper plate having two circular openings, and the air bleeding side shutter plate is inserted into the lower plate so as to be back to back with the injection side shutter plate. The air bleeding side guide plate is arranged, and one of the two circular openings and the connection port are concentric with each other as the injection port, and are formed in the other circular opening and the injection side guide plate. The circular opening, the circular opening formed on the lower plate, and the circular opening formed on the air bleeding side guide plate are positioned so as to be concentric with each other as the air bleeding port, and then the upper plate and the injection side. The bottom mold for filling a grout material according to claim 1, wherein the guide plate, the lower plate, and the air bleeding side guide plate are connected to each other. It is installed in the opening of the insertion hole formed upward so that the reinforcing means can be inserted and placed in the bedrock, concrete skeleton and other parts to be reinforced, and placed in the insertion hole so that the upper end is located just below the uppermost part of the insertion hole. In the grout material filling bottom formwork provided with an air bleeding port through which the air bleeding member is inserted and an injection port into which the grout material to be filled in the insertion hole is injected.
An air bleeding side blocking means that blocks the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and a grout from the insertion hole by closing the injection port. It is provided with an injection side blocking means for blocking the outflow of the material, and the air bleeding side blocking means is provided with a closing position for closing the air bleeding port and an opening position for advancing or retreating from the closing position to open the air bleeding port. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the two, and the injection side blocking means is moved forward or backward from the closing position that closes the injection port and the closing position. The injection side shutter plate is arranged so that it can move forward and backward between the opening position and the opening position.
It consists of a section formed by a notch and a sheet body extending around the section, and the section is opened out of the plane of the sheet body as the air bleeding member is pulled out by inserting the section in a pushed-open manner. For pulling out a sheet-like elastic material configured to return from the state to a state of being substantially the same plane as the sheet body, or the air bleeding member inserted in a form in which an opening is provided and the opening is expanded. A bottom form for filling a grout material, characterized in that a sheet-shaped elastic material configured to return from the expanded state to the contracted state is provided as the air bleeding side blocking means. It is installed in the opening of the insertion hole formed upward so that the reinforcing means can be inserted and placed in the bedrock, concrete skeleton and other parts to be reinforced, and placed in the insertion hole so that the upper end is located just below the uppermost part of the insertion hole. In the grout material filling bottom formwork provided with an air bleeding port through which the air bleeding member is inserted and an injection port into which the grout material to be filled in the insertion hole is injected.
An air bleeding side blocking means that blocks the outflow of the grout material from the insertion hole by closing the air bleeding port after the air bleeding member is pulled out, and a grout from the insertion hole by closing the injection port. It is provided with an injection side blocking means for blocking the outflow of the material, and the air bleeding side blocking means is provided with a closing position for closing the air bleeding port and an opening position for advancing or retreating from the closing position to open the air bleeding port. The air bleeding side shutter plate is arranged so as to be able to move forward and backward between the two, and the injection side blocking means is moved forward or backward from the closing position that closes the injection port and the closing position. The injection side shutter plate is arranged so that it can move forward and backward between the opening position and the opening position.
It consists of a section formed by a notch and a sheet body that spreads around the section, and the section is opened to the outside of the surface of the sheet body by the injection pressure of the grout material, and is opened by the disappearance of the injection pressure. A sheet-like elastic material configured to return from the state to a closed state which is substantially the same plane as the sheet body, or an expanded state in which an opening is provided and the opening is expanded by the injection pressure of the grout material. A bottom mold for filling a grout material, which is provided with a sheet-shaped elastic material configured to return from the expanded state to the contracted state by the disappearance of the injection pressure as the injection side blocking means.

Images