JPS6243011B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is designed to connect an already cast block and a post-cast block adjacent to it in a concrete structure, mainly when jointing between adjacent concrete cast blocks of a continuous underground wall. This invention relates to a movable reinforcing bar assembly system for jointing movable reinforcing bars.

Currently, continuous underground walls are normally used as equipment for underground excavation, but in recent years various developments have been attempted to use underground walls as part of the main body wall. The reality is that there is nothing very remarkable. The reason for this is that normally an underground continuous wall is constructed by constructing one block and then excavating the adjacent block and pouring concrete, so if reinforcing bars etc. are protruded from the joints of the already poured blocks, the excavation of the adjacent block will not be sufficient. This is because, in the end, there is almost no connection function between adjacent blocks. For example, even an underground wall of about 20 to 50 meters can only resist shearing force at most, and cannot be used as a complete connection. Currently, there are none in use.

In view of the current situation, this invention installs a movable reinforcing bar device inside an already cast block, and when excavating an adjacent block, the joint part of the already cast block is made smooth so that there are no obstacles. This makes it possible to excavate reliably, and after the excavation is completed, the movable reinforcing bar device of the already cast block is activated to protrude the reinforcing bars at the joint, thereby completing the connection and integration with the adjacent block. The purpose of the present invention is to provide a movable reinforcing bar assembly system that makes it possible to

An example of an underground continuous wall illustrating the present invention will be described below. A trench 1 in the preceding casting block A of the continuous underground wall is excavated, and a partition plate 2 is installed inside the trench 1 at the joint with the adjacent casting block B. The movable reinforcing bar device 3 incorporated therein is inserted and installed.

The movable reinforcing bar device 3 includes an outer injection pipe 4 parallel to the partition plate 2, an inner injection pipe 5 inserted into the inner injection pipe 5, a cylinder pipe 6 installed laterally between the outer periphery of the injection pipe 4 and the partition plate 2, and It is composed of a movable reinforcing bar 7 inserted into the interior so as to be freely movable.

A large number of discharge ports 8 are provided around the inner injection pipe 5, and packers 9 are installed at predetermined intervals. The cylinder pipes 6 are attached in stages along the longitudinal direction of the outer injection pipe 4 via connecting pipes 10 communicating therewith, and the number of cylinder pipes is branched as required at each stage.
A drainage channel 11 is provided on the outer periphery of the tip of the cylinder pipe 6 to bring the tip opening into close contact with the partition plate 2, and inside the drainage channel 11, water and air from glass fibers, synthetic resin powder, etc. can pass through, and sand, cement, etc. It is filled with a water-permeable material 12 designed to prevent the passage of particles, and the inside thereof communicates with an inlet 13 and an outlet 14 provided in the cylinder pipe 6 and the partition plate 2.

The movable reinforcing bar 7 has piston bodies 15, 15' such as gaskets fixed to the outer periphery of its intermediate portion, and is slidably in close contact with the inner surface of the cylinder pipe 6 at the outer periphery. A protrusion opening 16 for the movable reinforcing bar 7 is provided in the partition plate 2 in front of the tip of the movable reinforcing bar 7.

After installing the movable reinforcing bar device 3 configured as described above in the trench 1 of the preceding block A, reinforcement is arranged in this trench 1 and concrete is poured. Excavate trench 1' of block B. In this case, since the movable reinforcing bar 7 is housed in the cylinder pipe 6, the surface of the partition plate 2 facing the adjacent block B is smooth without any protrusions, so that the trench 1' can be reliably and smoothly moved. Can be excavated.

After the trench 1' has been excavated in this manner, the movable reinforcing bar device 3 is activated. That is, a hardening agent 17 such as mortar is pumped from the inner injection pipe 5, forced into the outer injection pipe 4 through the discharge port 8, and then flowed into the cylinder pipe 6.
As a result, pressure is applied to the piston body 15 of the movable reinforcing bar 6, which moves the movable reinforcing bar 6 forward and causes it to protrude from the projection opening 16 of the partition plate 2. and,
When the piston body 15' comes into contact with the partition plate 2, the movable reinforcing bar 6 stops protruding, and the piston body 15
Air in the cylinder pipe 6 and surplus water from the curing agent 17 filled inside the cylinder pipe 6 flow into the drainage channel 11 from the inlet 13 located at the rear of the cylinder pipe 6, pass through the water-permeable material 12 inside the drainage channel 11, and drain the partition plate 2. As it is discharged from the outlet 14, the permeable material 12 becomes clogged with the sand and cement paste of the hardening agent 17, which does not permeate, and the inside of the cylinder pipe 6 is filled with the dense hardening agent 17 that has been deaerated and excess water removed. Filled in a compacted manner.

In this state, with the aid of the sealing action of the packer 9, the outer injection pipe 4 and cylinder pipe 6 are densely filled with hardening agent and solidified as one body, and the movable reinforcing bar 7 is also in a protruding state. It is integrally fixed to this. As a result, by arranging reinforcement in adjacent block B and pouring concrete, both blocks A and B are completely connected and integrated, making it possible to construct a strong continuous underground wall.

In the above configuration, the injection tube has a double-tube structure, but it is also possible to configure this with a single injection tube. It goes without saying that the system of this invention can be applied not only to underground continuous walls but also to joints between a preceding concrete pouring block and an adjacent post-concrete pouring block in various concrete structures.

As described above, according to the present invention, a cylinder pipe that communicates with the injection pipe is connected laterally between the partition plate and the injection pipe arranged parallel to the partition plate, and a piston body that slides on the inner surface of the cylinder pipe is provided in the cylinder pipe. The movable reinforcing bars provided in the intermediate part are inserted so as to be able to move forward and backward, and the partition plate is provided with a protruding opening in the part facing the movable reinforcing bars, so these can be inserted into the joint part of a pre-casting block of an underground continuous wall, for example. By setting it up,
When excavating an adjacent post-cast block, it is possible to excavate without any protrusions that may obstruct the excavation, and after the excavation, the hardening agent such as mortar is forced into the cylinder pipe through the injection pipe. With the pressure of Therefore, it is possible to completely and firmly integrate concrete blocks that are mutually located at great depths.

In addition, a drainage channel is provided on the outer periphery of the tip of the cylinder pipe to drain water from the inside to the outside of the partition plate, and this drainage channel is filled with a water-permeable material, so that the air inside the cylinder pipe and the inside of the pipe are filled with water. Excess water in the hardening agent can be discharged, and the inside of the cylinder pipe can be solidified and integrated more tightly.

Therefore, with this invention, continuous underground walls, which were conventionally difficult to integrate continuously, can be firmly and continuously integrated,
It became possible to use this as the main wall of a structure.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical cross-sectional view showing an embodiment of the invention, FIG. 2 is a cross-sectional view thereof, and FIG. 3 is a partial vertical cross-sectional view showing a protruding state of a movable reinforcing bar. 2... Partition plate, 4... Outer pipe for injection, 5... Inner pipe for injection, 6... Cylinder pipe, 7... Movable reinforcing bar, 1
DESCRIPTION OF SYMBOLS 1...Drain channel, 12...Water permeable material, 13...Inflow port, 14...Drain port, 15, 15'...Piston body, 16...Protrusion port, A...Advanced casting block,
B...Adjacent pouring block.

Claims (1)

[Claims] 1 A cylinder pipe that communicates with the injection pipe is connected horizontally between the partition plate and the injection pipe arranged parallel to the partition plate, and a movable reinforcing bar with a piston body in the middle part that slides on the inner surface of the cylinder pipe is installed in the cylinder pipe. The partition plate is inserted so that it can move forward and backward, and the partition plate is provided with a protruding port in a portion facing the movable reinforcing bar, and a drainage channel is provided on the outer periphery of the tip of the cylinder pipe for draining water from the inside to the outside of the partition plate. A movable reinforcing bar assembly system characterized by filling the inside of the road with permeable material.