JPS6164921A - Slime remover for underground continuous wall work - Google Patents

Abstract

PURPOSE:To concurrently perform the separation and suction of slime by a single slime remover by a method in which a multiple tube is penetrated into a trench, mud water is sentunder pressures into the tube to separate slime from partition plates, and the multiple tube is landed to the trench bottom to suck up settled slime. CONSTITUTION:Multiple tubes 3 and 3a are lowered, mud water is sent under pressures into the main tube 1 and sprayed onto partition plates 11 and 11a to separate slime. The slime is then settled on the bottom of the trench. The tubes 3 and 3a are bent by pulling a wire 8, and one 3 of the tubes 3 and 3a is lowered to the bottom of the trench to suck up slime settled on the bottom. As the tube 3 strokes reciprocally, the slime is removed, and the tube 1 and the tube 3 are pulled up for removal. The other tube 3a is lowered and slime is removed. The separation and suction of slime from the partition plates can thus be made by a single slime remover, and the preparation and maintenance control of the slime remover can be made easier.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slime removal device used in an underground continuous wall construction method.

In general, underground continuous walls are constructed in units of wall units, and the trenches excavated to construct each unit wall are filled with bentonite slurry to prevent the walls from collapsing. Bentonite mud water aggregates over time and becomes slime.
This slime adheres to the partition plates that partition the ends of the unit walls.

Such adhesion of slime causes a decrease in the bonding strength or water-stopping property between the unit walls.

Therefore, slime must be removed before concrete is poured.

Conventionally, slime is removed by first spraying high-pressure water from a jet pipe to remove the slime that has adhered to the partition plate, then allowing it to settle at the bottom of the slot, and then moving a vertical air lift pipe along the slot. The procedure is such that the precipitated slime is sucked in through the air lift tube. However, in the conventional method as described above, separate devices are used to separate and inhale the slime from the partition plate. In addition, when inhaling slime, it requires a great deal of effort to move the entire air lift tube.

This invention was made to improve the above-mentioned drawbacks of the conventional slime, and it is possible to perform both slime peeling and suction with one device, and it requires almost no effort to operate. The purpose is to provide a slime removal device that does not.

That is, the present invention provides a long main pipe, a flexible pipe connected to the main pipe, and a multiplex pipe having an outermost pipe connected to the flexible pipe, and a container constituting the multiplex pipe. said main pipe, said main pipe comprising a multi-tube which is expandable and retractable as a whole by making the pipe capable of moving in and out of the outer pipe, and in which the tip of the innermost pipe opens in a direction intersecting the pipe axis; A cable is provided to move along the cable, one end of the cable is hooked to the innermost pipe of the multiple pipe, and an on-off valve is provided at the opening of the innermost pipe. Found in slime removal equipment used in continuous wall construction method.

The embodiment shown in the drawings will be described below.6 As shown in FIGS. 1 to 4, the slime removal apparatus includes a long main pipe 1 having pressure resistance, a flexible pipe 2, and a multiplex pipe 3. The flexible tube 2 has a bellows structure that can be expanded, contracted and bent, and one end thereof is connected to the main tube 1, and the other end is connected to the multiplex v3. In this embodiment, the multiple tube 3 includes a first tube 4 which is the outermost tube;
The second pipe 5 inside it and the third pipe which is the innermost pipe inside it.
It consists of a triple tube having a tube 6, and the rear end of the first tube 4 is connected to the other end of the flexible tube 2.

Second. The third tubes 5 and 6 can be moved in and out of the first and second tubes 4.5, respectively, so that the multiple tube 3 can be expanded and contracted as a whole.

Bands 7 are fastened to the main pipe 1 at appropriate intervals, and a guide member 9 for the wire 8 is provided on the band 7. A pulley is used as the guide member 9 at the tip of the main pipe 1, and other A ring is used in the position (third
(see figure).

The rear end of the first tube 4 and the first, second . A guide member 9 for the wire 8 is also provided at each tip of the third tube 4°5.6, and a pulley is used as the guide member 9 at the rear end of the first tube 3.
In other positions rings are used. wire 8
has its tip hooked to the guide member 9 at the tip of the third tube 6,
It is guided by a guide member 9 provided on the second and third pipes 4 and 5 and the main pipe 1 and moves along these pipes.

An axle IO is provided on both sides of the band 7 attached to the main pipe 1, and this wheel 11@10 engages with a guide rail 12 in a slot provided in the partition plate 11, so that the main pipe 1 can run. It has become.

As shown in FIG. 5, at the rear ends of the second and third pipes 5 and 6
A rubber backing 14 sandwiched between a pair of presser rings 13 is fixed via screws.

This rubber backing 14 is in sliding contact with the first and second tubes 4 and 5.

As shown in FIG. 6, the tip of the third pipe 6 is opened in a direction intersecting the pipe axis, and a valve box 17 of an on-off valve 16 is installed in the opening 15 of the third pipe 6. In this embodiment, a slide valve is used as the on-off valve 16, and a valve box 17 is provided with an opening 18.
A valve body 19 is slidably housed in the valve body 19 . The valve body 19 is connected to a rod 21 housed in a case 20 provided in the third pipe 6 so as to be freely removable and removable, and a spring 22 is interposed between the rear end of the rod 21 and the case wall. The spring 22 constantly biases the opening 18, that is, the opening 15, in a direction to close it. A wire 23 is fixed to the rear end of the rod 21, and this wire 23 passes through the case wall, and guide members 24 (provided on the third pipe 6) are provided at appropriate intervals in the multiple pipe 3 and the main pipe 1. (only shown) to move along those tubes,
By pulling this wire 23 against the urging force of the spring 22, the valve body 19 opens the opening 18.

Note that the biasing force of the spring 22 is the same as that of the rubber backing 14 and the first. The frictional force between the second pipes 4 and 5 is set to be smaller than the frictional force between the second pipes 4 and 5.

In Figures 1 and 2, 25 is an axle provided at the tip of the third pipe, and in Figures 3 and 4, 26 is a reinforcing cage.

27 is a joint reinforcing bar.

Next, the state of use of the above device will be explained with reference to FIG. 8.

FIG. 8A shows the construction of the preceding unit wall 28 and the excavation of a slot 29 in the subsequent unit wall. The trailing partition plate 11a is inserted into the slot 29 until its lower end reaches a predetermined height from the bottom of the slot 29. Two slime removal devices as described above are prepared in advance, and slotted holes 2 are installed along the multiple pipes 3 and 3a and then along the leading partition plate 11 and the trailing partition plate 11a.
9, the wheels 10 of the main pipe 1 being brought into engagement with the guide rails 12 as shown in FIG. 3-4. Multiple tube 3,3
a is shortened by pulling the wire 8,
The on-off valve 16 is opened by pulling the wire 23, and muddy water is supplied to the main pipe 1 by a pressure pump as the multiple pipes 3 and 3a descend, and flows through the openings 18 and 15 to the partition plate 11゜11a. Spray this muddy water on. As a result, the slime adhering to the partition plates 11 and lla is peeled off and precipitated at the bottom of the hole.

Next, as shown in FIG. 8B, when the tip of one of the multiple pipes 3 descending along the preceding partition plate 11 reaches the bottom of the hole, the supply of muddy water is temporarily stopped, and the wire 23 is loosened to open and close the pipe. The valve 16 is closed. Also, trailing partition plate 1
When the other multiplex tube 3a descending along 1a also reaches the lower end of the trailing partition plate 11a, it is placed in the same state as the multiplex tube 3.

Next, as shown in Figures 8C and 8D, by pulling the wire 8, the multiplex pipes 3, 3a are bent approximately 90 degrees with respect to the main pipe 1 (see Figure 1), and in this state, one of the multiplex pipes 3 lower to the bottom of the hole. Note that the other multiple pipe 3a is not lowered and is kept in a standby state.

Next, as shown in FIG. 8E, the wire 8 is loosened and high pressure muddy water is supplied to the main pipe 1 again. At this time, the wire 23 is loosened and the on-off valve 16 is in a closed state, so the multiple pipe 3 is extended toward the trailing partition plate 11a due to pressure (see FIG. 2).

Next, the on-off valve 16 is opened by pulling the wire 23, the pressure pump is switched to a suction pump, and the slime precipitated at the bottom of the hole is sucked.

By pulling the wire 8 while sucking the slime, the multiple tube 3 is gradually shortened, and the multiple tube 3 is returned to the state shown in FIG. 8C. When the multiple pipe 3 is shortened, the wire 23 is also pulled at the same speed as the wire 8 to keep the on-off valve 16 open. After removing the slime in approximately half the length of the slot 28 corresponding to the expansion and contraction stroke of the multiple pipe 3, the main pipe 1
And, the multiple pipe 3 is pulled up and removed.

Next, as shown in FIG. 8F, the other multiplex tube 3a is lowered to the bottom of the hole and extended toward the preceding partition plate 11 by the same procedure as described above, and the remaining slime is removed when it is shortened, and after removal, it is pulled up. Remove.

After removing the slime as described above, the trailing partition plate 11a is lowered to the bottom of the hole as shown in FIG.
8. Concrete is poured and the trailing unit wall is constructed.

In the above embodiment, the multiple pipes are triple pipes, but double pipes, quadruple pipes or more may be used. Further, the on-off valve may be opened and closed by a solenoid.

Since the present invention is configured as described above, the slime can be removed from the partition plate and removed by suction using a single device, and therefore its preparation and maintenance are easy. It is sufficient to expand and contract only the multiple tubes while leaving the tubes in place at predetermined locations, requiring almost no effort to operate, and furthermore, the structure is extremely simple and can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the present invention. Fig. 2 is a front view of the same as above showing the state in which the multiple tubes are extended, Fig. 3 is a front view of the same as above showing the state of use, and Fig. 4 is taken along the line IV-rV of Fig. 3. 5 is a vertical sectional view of a part of the multiple pipe, FIG. 6 is a front sectional view showing an example of an on-off valve, FIG. 7 is a plan view of the same as above, and 8A to 8G are views of the device of this invention. Explanatory diagram 6 showing usage status 1...Main pipe 2...Flexible pipe 3...
・Multiple tube 18... Cable 15... Opening 16... Opening
Closed Benkamo 3 zu 104 zu zu

Claims (1)

[Claims] 1. A multi-layered pipe consisting of a long main pipe, a flexible pipe connected to the main pipe, and an outermost pipe connected to the flexible pipe, with each pipe constituting the multi-layered pipe connected to the outer side of the flexible pipe. The main pipe has multiple pipes that are extendable and retractable as a whole by being able to enter and exit the main pipe, and the tip of the innermost pipe is open in a direction that intersects the pipe axis. Used in an underground continuous wall construction method characterized by providing a movable cable, hooking the tip of the cable to the innermost pipe of the multiple pipes, and providing an on-off valve at the opening of the innermost pipe. A slime removal device.