JP3137586B2 - Filling device and method for ground improvement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground improvement filling apparatus and method for filling excavated ground by a replacement method.

[0002]

2. Description of the Related Art Such a method is disclosed in Japanese Patent Publication No. Hei 7-91945, Japanese Patent Laid-Open Publication No. Hei 6-117193, Japanese Patent Laid-Open Publication No. Hei 6-34.
Various proposals have been made as shown in US Pat.

In the prior art, it is difficult to completely drain the water in the filling line (filling pipe), switch to the filling material, and then fill the water.
Could not properly fill. In addition, there are many cases in which the filling material goes around the washing (water supply) line, or the washing after filling is incomplete, and the filling tube is blocked, so that subsequent filling cannot be performed.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention is intended to fill the ground with the filler by draining water in a filling line (filling pipe) in order to reliably fill the excavated ground with the soil improvement material. It is another object of the present invention to provide a ground improvement filling apparatus and method capable of draining a ground improvement material remaining in a filling pipe at the end of filling to prevent clogging of a filling line (filling pipe). .

[0005]

According to the present invention, there is provided the following ground improvement filling apparatus and method. A filling line for supplying a filler by a filler pump and a water supply line for supplying water by a water supply pump are provided, and both lines are connected to a filling pipe, and the filling pipe has a water supply position, a ball collection position, a filling position, The water supply line is provided with a first valve and a second valve from an upstream side to a drain port, and the filling line is provided with a filling switching valve and a filling pipe from the upstream side. And a ball is inserted into a filling line downstream of the filling switching valve, and the filling switching valve is switched between a filling position, a ball collection position, and a ball maintenance position.

Further, according to the method of the present invention, a filling preparation step of setting a filling switching valve to a filling position, closing a first valve provided in a water supply line, and opening a second valve to a drain port, Is operated, with the ball at the head, the filling material filling process in the filling tube for sending the water of the filling line to the water supply line and draining from the second valve, and moving the filling tube to the ball collecting position when the ball enters the filling tube, Filling pipe filling preparation step of stopping the filling pump at a predetermined pressure, moving the filling pipe to the filling position, filling step of operating the filling pump, and moving the filling pipe to the water supply position,
A washing preparation step of switching the filling switching valve to the ball collection position and opening the first valve provided in the water supply line, a cleaning step of operating the water supply pump, feeding the ball backward, stopping the water supply pump after collecting the ball, A filling end step of closing a first valve and a second valve provided in a water supply line, and a filling method for ground improvement accompanied with washing of the filling line.

[0007] If necessary, another line is connected between the filling switching valve and the filling pipe, and a fifth valve is provided in this line. Then, in the filling step, the fifth valve of another line provided between the filling switching valve and the filling pipe is opened, the pump in this line is operated, and the fifth valve is closed in the washing preparation step.

[0008] By providing a water supply line at the tip of the filling tube, water remaining in the filling line (filling tube) can be drained by reversely feeding the water supply line.

Further, when replacing the water remaining in the filling line (filling tube) with the filler, the filler is sent with the ball at the head, thereby preventing the mixing of the water and the filler.

[0010] After the filling is completed, water is sent from the water supply line, and the balls collected in the filling tube are sent back to the filling line, whereby the filling line can be washed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a water tank 1, a filler tank 2 and, if necessary, an instantaneous binder tank 3 are provided.
And a flash material pump 9 in the flash material line 6 as needed.

A pressure gauge 10 is connected to the water supply line 4 from the upstream side.
A first valve 11, a second valve 12 leading to a drain, a flow meter 13, and a third valve 14 for maintenance are provided as needed.

In the filling line 5, a pressure gauge 15,
A filling switching valve 16 which will be described in detail later, a fourth valve 18 for maintenance and a pressure gauge 19 are provided as required.

The water supply line 4 and the filling line 5 are connected to a filling pipe 22, which will be described in detail later. A ball 20 is placed in the filling line 5 downstream of the filling switching valve 16. An instantaneous binder line 6 is connected between the filling switching valve 16 and the fourth valve 18, and a fifth valve 21 is provided in the line 6.

The switching valve 16 is switched by a switching device 17 between a filling position and a ball collecting position. The filling pipe 22 is switched between a water supply position, a ball collection position, and a filling position by a filling pipe operation jack 23. T is the ground. The first valve 14 of the water supply line and the fourth valve 18 of the filling line are normally open.

Next, the operation will be described with reference to FIGS. With the filling pipe 22 in the water supply position, the filling switching valve 1
6 is a filling position, the first valve 11 provided in the water supply line 4 is closed, and the second valve 12 reaching the drain port is opened (filling preparation step, FIG. 1).

The filler pump 8 is operated to feed the water in the filling line 5 to the water supply line 4 with the ball 20 at the head, and the second
Water is drained from the valve 12 (filling material filling process in the filling pipe, FIG. 2).

When the balls 20 enter the filling tube 22, the filling tube 22 is moved to the ball collecting position, the second valve 12 provided on the water supply line 4 is closed, and the filling pump 8 is stopped at a predetermined pressure (filling tube filling). Preparation process, Fig. 3).

The filling pipe 22 is moved to the filling position, and the filling material pump 8 is operated. If necessary, the instantaneous material pump 9 is operated to open the fifth valve 21 provided in the instantaneous material line 6 (filling process, FIG. 4).

The filling pipe 22 is moved to the water supply position, the filling switching valve 16 is switched to the ball collection position, the fifth valve 21 is closed,
The first valve 11 provided in the water supply line 4 is opened (washing preparation step, FIG. 5).

The water pump 7 is operated, the balls 20 are fed backward, and after the balls 20 are collected, the water pump 7 is stopped (washing process, FIG. 6).

The filling tube 22 is moved to the ball maintenance position to exchange the balls (FIG. 7). Then, the first valve 11 and the second valve 12 provided in the water supply line 4 are closed (filling end step).

In the examples shown in FIGS. 1 to 7 described above, the outlet side is narrowed to take the ball 20 into the filling tube 22 and the diameter is reduced so that the ball 20 does not penetrate the filling tube 22. However, the same function can be realized by providing a bar B (one example is shown in the axial direction in the drawings) as shown in FIGS. At this time, the number and direction of the rods B may be arbitrary. Further, as shown in FIG. 10, a network N may be used. In short, ball 2
It is sufficient if 0 does not penetrate, and it can also be realized by providing something like a protrusion on the exit side of the through hole (not shown).

Next, another embodiment is shown in FIG. 11 to FIG. As shown in FIG. 2 above, when the ball is placed in the filling tube 22, some of the filler is supplied to the water supply line 4.
If left for a long period of time, it will solidify in the tube and the injection device will not function. Therefore, as shown in FIGS. 11 to 17, the through-hole H in the filling tube 22A is provided diagonally (in the figures, a shape is formed so as to make the passage of the ball smoother in an S shape). . The following FIGS. 11 to 17
In the description of each step, the operation of each step of the charging switching valve 16, the pumps 7 to 9, and the like, which are omitted in the drawing, is the same as the operation of each step shown in FIGS. .

FIG. 11 shows a filling preparation process, in which the filling tube 22 is used.
A is a water supply position, and the water supply line 4 closes the first valve 11 and opens the second valve 12 reaching the drain port. FIG. 12 shows the filling material filling process in the filling pipe, in which the water in the filling line 5 is sent to the water supply line 4 with the ball 20 at the head, and drained from the second valve 12. FIG. 13 shows a filling tube filling preparation process, in which the filling tube 22A is filled.
The ball 20 enters the through hole H in the inside, and the filling tube 22A moves to the ball collecting position. FIG. 14 shows the filling process, in which the filling tube 22A moves to the filling position and drives the filling pump 8. FIG. 15 shows a washing preparation step and a washing step. The filling pipe 22A moves to the water supply position, and the first valve 11 of the water supply line 4 is moved.
Is opened, and the water pump 7 is operated to send the ball 20 backward.

Further, as shown in FIG.
0 is taken into the filling tube 22A (water supply line washing preparation step). Then, as shown in FIG. 17, after moving the filling pipe 22A, the washing water is sent from the filling line 5 to wash the water supply line 4 (water supply line washing step). The water supply line 4 may be washed once every several injections. The amount of filler leaking into the water supply line 4 is small,
Due to the specific gravity of the filler, etc., the filling pipe 22A of the water supply line 4
It is sufficient that only the vicinity can be cleaned. Then, as shown in FIG. 17, the first valve 11 is closed and the second valve 12 is opened,
Is collected from the second valve 12. In the above-described embodiment, in order to take in the ball 20 into the filling tube 22A, the through hole H is inclined, and the opening cross section is narrowed due to the positional deviation from the outlet side, so that the ball 20 is securely inserted into the filling tube 22A. Although, the position control of the through hole H is somewhat complicated. Therefore, FIGS. 18 and 19 show an example in which the rod R is taken in and out using a cylinder or the like and the ball 20 is taken in reliably. In FIG. 18, the ball R is taken into the filling tube 22 by projecting the rod R from the opening end of the water supply line 4 to the filling tube 22. FIG.
In 9, the rod R is projected from the diagonal direction to the water supply line 4. In these examples, the rod R is always in the extended position, and only when the water supply line 4 is cleaned, the rod R is in the contracted position to allow the ball to pass.

When the filling line and the water supply line which open oppositely into the filling pipe are disposed so as to obliquely intersect with the axis of the filling pipe and open oppositely, the leading end of the filling pipe is positioned at the axis. In addition, the filling line 5 can be opened and the water supply line 4 can be closed in the filling process even if the surface is orthogonal to the above. .

Further, if the opening positions of the washing line and the water supply line in the filling pipe are shifted in the axial direction of the filling pipe, the balls can be taken into the filling pipe even if the through hole is straight. It is not necessary to use an S-shaped through hole as in the second embodiment.

FIGS. 20 to 24 show a charging switching valve according to another embodiment. The filling switching valve 16 shown in FIG.
A is provided with a liquid feed valve Vs for switching between the liquid feed pipe L1 and the drain pipe L2, and a ball feed valve Vb for charging and collecting the ball 20, and operates the liquid feed valve Vs by the liquid feed valve jack J1. , The filling line 5 is connected to the liquid feeding pipe L1.
And the drain pipe L2. Further, the ball feed valve Vb is operated by the ball feed valve jack J2, and the ball 20 is put into the filling line 5 from the ball input port E, or is sent from the filling line 5 to the ball input port E and collected.

The filling switching valve 16 shown in FIGS. 21 and 22
FIG. 2B shows a single valve body V1 in which a communication hole H3 for liquid supply and a cutout H4 for drainage are provided, and switching is performed by one jack J.
At the drain position shown in FIG. 2, the filling line 5 is released to the drain port L4, and the ball 20 is taken into the communication hole H3 for liquid sending from the ball input port E. At the liquid sending position shown in FIG.
Is communicated with the liquid sending pipe L3 through the liquid sending communication hole H3, and the ball 20
Into the filling line 5. FIG.
The filling switching valve 16C shown in FIG.
2, a communication hole H5 for liquid supply and a communication hole H6 for drainage are provided, and the filling line 5 is similarly switched between the liquid supply pipe L3 (see FIG. 23) and the water distribution pipe L6 (see FIG. 24) by the jack J. . In the examples shown in FIGS. 21 to 24,
As in the example of FIG. 20, the liquid supply pipe H1 and the water distribution pipe H2 do not need to be flexible, and can be fixed.

[0031]

The present invention has the following excellent effects. (B) By installing a water supply line at the end of the filling pipe,
After expelling the water remaining in the filling line (in the filling pipe), the filling material can be sent, and the ground can be surely improved. (B) When replacing the water remaining in the filling line (filling pipe) with the filler, by sending the filler with the ball at the top, mixing of the water and the filler can be prevented, The ground can be surely improved. (C) By temporarily collecting the sent balls with a filling tube, the trouble of putting the balls in each washing can be saved. (D) By sending water from the water supply line immediately after the filling is completed, the balls temporarily recovered by the filling pipe can be sent back, and the filling line for the filler can be washed and the line can be prevented from being clogged.

[Brief description of the drawings]

FIG. 1 is a piping diagram showing a filling preparation process of a filling device for ground improvement.

FIG. 2 is a piping diagram showing a filling material process in a filling pipe of a filling device for ground improvement.

FIG. 3 is a piping diagram illustrating a filling pipe filling preparation process of a filling device for ground improvement.

FIG. 4 is a piping diagram showing a filling process of a ground improvement filling device.

FIG. 5 is a piping diagram showing a cleaning preparation process of the ground improvement filling device.

FIG. 6 is a piping diagram showing a filling end process of the filling device for ground improvement.

FIG. 7 is a piping diagram showing a ball maintenance position of a filling tube.

FIG. 8 is a cross-sectional view illustrating another embodiment of ball capture in a filling tube.

FIG. 9 is a side sectional view of FIG. 8;

FIG. 10 is a cross-sectional view showing yet another embodiment of capturing a ball in a filling tube.

FIG. 11 is a piping diagram showing a filling preparation process of a ground improvement filling device according to another embodiment.

FIG. 12 is a piping diagram illustrating a filling process in a filling pipe of a filling device for soil improvement according to another embodiment.

FIG. 13 is a piping diagram showing a filling pipe filling preparation process of a ground improvement filling apparatus according to another embodiment.

FIG. 14 is a piping diagram showing a filling process of a ground improvement filling device according to another embodiment.

FIG. 15 is a piping diagram showing a cleaning preparation process of a ground improvement filling apparatus according to another embodiment.

FIG. 16 is a piping diagram showing a water supply line cleaning preparation process of a ground improvement filling apparatus according to another embodiment.

FIG. 17 is a piping diagram showing a water supply line cleaning process of a filling device for soil improvement according to another embodiment.

FIG. 18 is a cross-sectional view of an embodiment in which the through-hole is linear.

FIG. 19 is a cross-sectional view of another embodiment in which the through-hole is linear.

FIG. 20 is a sectional view showing a filling switching valve according to another embodiment.

FIG. 21 is an explanatory view showing still another filling switching valve.

FIG. 22 is an explanatory diagram showing a drain position in FIG. 21.

FIG. 23 is an explanatory view showing still another filling switching valve.

FIG. 24 is an explanatory view showing a drain position in FIG. 21.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Water tank 2 ... Filler tank 3 ... Instantaneous binder tank 4 ... Water supply line 5 ... Filling line 6 ... Instantaneous binder line 7 ... Water pump 8 ... · Filling material pump 9 · · · instantaneous bonding material pump 10 · · · pressure gauge 11 · · · 1st valve 12 · · · 2nd valve 13 · · · flowmeter 14 · · · 3rd valve 15 · · · pressure Total 16, 16A, 16b, 16C Fill switching valve 17 Actuator 18 Fourth valve 19 Pressure gauge 20 Ball 21 Fifth valve 22, 22A ...・ Filling tube 23, J, J1, J2 ... operating jack

──────────────────────────────────────────────────続 き Continuing on the front page (72) Tatsuro Tamai 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Shunsuke Shirai 1-chome Moto-Akasaka, Minato-ku, Tokyo No. 2 Kashima Construction Co., Ltd. (56) References JP-A-56-12418 (JP, A) JP-A-1-190817 (JP, A) JP-A-56-28922 (JP, A) 64-28429 (JP, U) JP-A 1-180539 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) E02D 3/12 101

Claims (7)

(57) [Claims] 1. A filling line for supplying a filler by a filler pump and a water supply line for supplying water by a water supply pump, both lines being connected to a filling pipe, the filling pipe being provided with a water supply position and ball collection. A filling device for improving ground, wherein the filling device can be switched between a position and a filling position. 2. The water supply line is provided with a first valve from an upstream side and a second valve leading to a drain, and the filling line is provided with a filling switching valve from an upstream side. A ball is inserted in a filling line downstream of the switching valve, and the filling switching valve is switched between a filling position, a ball collection position, and a ball maintenance position.
The filling device for ground improvement according to claim 1. 3. The ground improvement according to claim 2, wherein another line is connected between the filling switching valve and the filling pipe, and a fifth valve is provided in the line. Filling device. 4. The ground improvement filling apparatus according to claim 3, wherein the filler is a ground improvement material, and the instantaneous setting material is supplied from another line. 5. A filling preparation process in which a filling switching valve is set to a filling position, a first valve provided in a water supply line is closed, and a second valve to a drain port is opened, and a filling pump is operated to move a ball to a head. And filling the filling line with water into the water supply line, draining the water from the second valve, and filling the filling tube with balls. When the balls enter the filling tube, move the filling tube to the ball collection position, and operate the filling pump at a predetermined pressure. Stop filling tube filling preparation process, move the filling tube to the filling position, operate the filling pump, move the filling tube to the water supply position, switch the filling switching valve to the ball collection position, and switch to the water supply line. A cleaning preparation step for opening the first valve provided, a cleaning step for operating the water supply pump, reversely feeding the ball, stopping the water supply pump after collecting the ball, and a first valve and a second valve provided for the water supply line. Closing the filling process, and Soil improvement filling method with a filling line wash to symptoms. 6. In a filling step, a fifth valve of another line provided between the filling switching valve and the filling pipe is opened, a pump of the line is operated, and the fifth valve is closed in a washing preparation step. The filling method for ground improvement accompanied with washing of a filling line according to claim 4. 7. The filling method for soil improvement with filling line cleaning according to claim 6, wherein the filler is a ground improvement material, and the instantaneous binder is supplied from another line.