JPS5865896A - Embedding of pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a controlled construction method, specifically to ground with a large amount of groundwater ((
Regarding the method of burying pipes.

When burying water supply and sewage pipes and protection pipes for various cables underground horizontally under the tracks of roads and Chichido roads, this is a construction method for burying the pipes without excavating above the ground by digging a shaft from above the ground by sandwiching the road. However, a construction method has been implemented in which the pipe is pushed and buried while excavating underground using a horizontal excavation device such as a horizontal ocher screw from within this shaft.

However, in this kind of controlled construction method, Fi+li1
The ground is J11! If the ground is above the sewage water level and does not contain water, no particular problem will occur.Also, when excavating and burying the pipe in ground that contains groundwater, such as a water-retaining sand layer, horizontal A major drawback is that when excavating with a drilling rig, groundwater flows into the casing of the horizontal drilling rig and into the shaft, causing the ground to sink and sink during excavation.

% by the same applicant as a way to eliminate this lack of existing
Gansho St, -309g0 management construction method, that is, the casing of the horizontal excavation equipment and the soil removal tank are connected in a liquid-tight manner, and the horizontal excavation is carried out while resisting the water IF of filtered groundwater flowing into the separate casing. The present invention relates to an improvement of the prior invention, which has been proposed as a controlled construction method for pushing and burying underground pipes. The purpose is to further facilitate the

The feature of the present invention is that the amount of water in the dumping tank corresponding to the volume of excavated soil and water taken into the earth removal tank by excavation is transferred to the water provided in the soil removal tank. By horizontally excavating while returning a part of the returned violet water to another mountain using a return pump and circulating it as sweep water to the earth and sand intake path for soil removal, the water pressure on the face can be increased by using the returned water. The pressure is equal to or higher than the groundwater pressure to prevent the ground from collapsing during excavation, and at the same time, the return water is used as a lubricant to reduce the required propulsion force, and the sweep water facilitates the uptake of soil. This is due to improved work efficiency.

Next, an example of the construction method of the present invention will be explained with reference to FIGS. 1 to 6.

Figure 47 shows the cage (1iii) state, (1) is a horizontal excavation device, and the cage (2) and the earth removal tank (41) installed in the shaft (3) are connected in a fluid-tight manner. ing.

Of course, this platform tank (4) may be installed on the ground.

(5) is a water return installed at the top of the soil removal tank (4).
It is Bonobu, and the discharge port of its water return pump (5) is face 11! It is connected to a return water flow path (7) with a discharge port (61 mm) near 1 fl.

(8) is a sweep water channel that branches off from (7), and that's the flow! lk ['l is tank (,1
) is connected to the soil intake channel (9). in this case,
Two discharge ports are provided in the water return and q-bo/f to create a return water flow path (7
) and the sweep water channel (8) may be provided independently.

(11) is a water stop grout for starting, and the face f face (
lO) has become a closed νh due to 7-L Hokuzo et al.

In addition, a liquid (121) such as water is supplied to the earth removal tank (4), and the inside of the casing (2) and the inside of the earth removal tank (4) are connected in a liquid-tight manner. (,
When the liquid (12) becomes full in 41, the liquid supply can be increased by one. (131 is a propulsion jack, and (14) is a support wall.

Figure 2 shows the state of excavation while resisting the groundwater (a) in the paddy field, which is the next process.Horizontal excavation is performed with the face M'l direction (10) open, ) and water is flowing into the tank (41) from the earth and sand intake port (4a) by the screw conoveyor (15), and the liquid in the tank (4) (121 is the return water flow path) due to the operation of the water return pump (5). (The violet water is discharged to the front of the face and to the outside through 71 channels, and at the same time, part of the returned violet water is sent to the bed sweep water channel (81 to the sediment intake channel (9) as bad water. .

The excavated soil (b) taken into the tank (11) settles and is separated from the liquid (12゛) and the ground water taken in by the pump (5) installed at the top of the tank (41). Only liquids (121 and groundwater taken in from the bottom)
fλ is applied. In addition to the excavation, the underground pipe (161) was pushed and buried as usual.

Figure 3 shows the state at 541 when the tank (41) is full of earth and sand (B) due to excavation, and the face n11 face 110
) and the earth and sand intake port cha) of the tank (4) are blocked by the sole or valve. (//a
) is a water gelatin in Screw Conovea (151).

Connection port with tack (41) of y casing (2) (, 2a
) is blocked. In addition, at this occasion, face 111 t+
Since 111 is a closed river, the city water (//d) and the connection port (yua) will not cause any inconvenience even if they are in an open state.

- The second figure shows the next step, which is to connect the buried pipe (+61) to the screw conveyor (151) and the tank (4) for earth and sand discharge.
) Indicates the state of missing transfer. The earth removal tank (11 is a tank for earth and sand (O
n discharge.

Figure S shows the state of reaching the shaft (3a) of reaching III and the state of drainage of water in the knee conveyor (15), that is, the state of drainage of water in the knee conveyor (15).
From the state shown in the figure, the soil removal tank (11
Connect the casing (21) to the casing (21) and open the connection port between the casing (2) and the tank (4) as shown in Figure 1. By repeating horizontal excavation and pushing and burying the pipe, the shaft on the other side (3a
) is a water-stop grout. Mesculi Euconobea (1
5) The inside is drained.

Figure 6 shows the removal of equipment and installation of pipes. A buried pipe (161
However, there is no risk of groundwater leaking at the edge of Mt. 111, and equipment can be easily removed.

Since the managed construction method of the present invention is as described above, it has the following effects.

That is, firstly, a horizontal drilling rig (11 casings (2
) and soil removal pipe (41) are connected in a fluid-tight manner to withstand the water pressure of groundwater flowing into the cage/g (2). Tank (4
) Drainage corresponding to the volume of excavated soil and water in the ground is taken into the tack (return the water in 41 to 7, and return to 'Jhop/p) near the face of the ground by the operation of 1. Return to ``),
Water 11E near the face is groundwater 11:.

1. Completely prevent ground subsidence due to excavation.

Second, in the return near the face of another mountain, the 11th mountain of Mt.
This prevents sticking and acts as a lubricant, significantly reducing the required propulsion force.

In addition, the viscous water contained in the 111 mountain top quality is mixed in and acts as a good slipping material because it plays the role of muddy water.As a result, the propulsion distance can be greatly extended. becomes possible.

Thirdly, the groundwater taken from the liquid Omahi ground in the evening tank (4) is returned to the ground near tJJ +J by the water return bonoff (5) installed in the soil removal tank (4). Part of the returned water becomes earth and sand] Qy colored channel (9
), the excavation propulsion is carried out continuously. Qin efficiency becomes very similar.

Page 1 of 171 is an embodiment of the present invention, and Figures 1 to 6 are explanatory diagrams showing the 1111:1 order of the excavation process.

ill, horizontal drilling equipment +2+,, Keisink (4)
.

, soil removal tank (da a) 0. Sediment intake port (5).

Water mud j'・3 Bonoff

Claims (1)

[Claims] Groundwater IJ flowing into the cage puffer by liquid-tightly connecting the cane knob of the horizontal excavation device and the soil removal tank:
In the controlled construction method, which involves horizontal excavation and zero-push burying of buried pipes while resisting The liquid in the earth removal tank is returned to the water tank installed in the earth removal tank △ 111 by Bo/Bu! A controlled construction method in which horizontal excavation is performed while returning a portion of the returned water to the mountain and using a portion of the returned water as running water for the earth and sand intake path (111) of the earth removal tank.