JPH0216293A - Method of propulsion burying construction of perforated pipe - Google Patents

Abstract

PURPOSE:To improve operating efficiency, and to reduce cost by respectively utilizing two or more of communicating pits as mud feed ducts and mud discharge ducts when perforated pipes are propelled into the ground while being successively connected through a muddy-water type propulsion construction method. CONSTITUTION:Perforated pipes 1, 1 in constant length are propelled gradually into the ground while being connected in succession through a muddy-water type propulsion construction method. Arbitrary pits in a plurality of pits communicating by connecting the perforated pipes 1, 1 are utilized as mud feed cuts 4a, 4a and other arbitrary pits as mud discharge ducts 4b, 4b at that time. Accordingly, the labor hour and expense of the disposal of separate mud feed ducts and mud discharge ducts can be omitted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a method for driving and burying perforated pipes, which are formed by dividing and penetrating holes into a plurality of places for electric wire laying pipes, gas or water pipes, into the ground. This is related to the method of construction.

[Conventional technology]

Conventionally, as a method of burying perforated pipes of a certain length in sequence by adding them to the ground, for example, Japanese Patent Publication No. 59-497
As described in Method No. 72, first, a lead pipe with a built-in excavator is dug into the ground from the starting shaft side, and temporary pipes with built-in soil evacuation devices are successively connected to this lead pipe to discharge earth and sand. While making the lead pipe reach the reaching shaft side, after reaching the
A perforated pipe follows the temporary pipe on the starting shaft side and propels it again.
A series of perforated pipes is buried underground by sequentially pushing out the temporary pipes toward the starting shaft side and sequentially propelling the perforated pipes to replace the temporary pipes with the perforated pipes.

On the other hand, as shown in Figure 8, a large-diameter pipe (b) is propelled and buried underground while being followed by a mud shield excavator (a), and then a plurality of small-diameter pipes are inserted into the large-diameter pipe. Another method is to arrange pipes and fill the gaps with concrete or the like.

[Problem to be solved by the invention] However, according to the former method of burying a porous pipe,
First, temporary pipes are temporarily buried between the starting shaft and the destination shaft, and then the temporary pipes are replaced with perforated pipes, which not only requires a long construction period but also increases construction costs. In addition, there is a problem in that it requires work to remove the temporary pipes, which requires a considerable amount of labor.

Moreover, according to the latter method, it is necessary to bury a large-diameter pipe and to install multiple small-diameter pipes, and in addition, each time a certain length of large-diameter pipe is buried, the length of the pipe must be Sludge pipe (C
) and the sludge drainage pipe (d), which not only requires a long period of work like the above construction method, but also requires work to connect the small-diameter pipe inside the large-diameter pipe by hand. There is a problem in that a pipe with a diameter larger than necessary must be used.

The present invention aims to solve these problems by providing a method for advancing and burying porous pipes.

[Means to solve the problem]

In order to achieve the above object, the perforated pipe propulsion burying method of the present invention involves propelling a perforated pipe into the ground while sequentially connecting a fixed length of perforated pipe, which is formed by penetrating a plurality of holes communicating between both ends. The burying method is characterized by using any two or more holes that communicate through connection as a sludge feed pipe and a sludge removal pipe, respectively, and propelling and burying a series of porous pipes underground using a muddy water propulsion method. That is.

[For production]

When propelling perforated pipes of a certain length into the ground while sequentially connecting them using the muddy water propulsion method, any hole among the multiple holes that communicate with each other through the connections is used as the mud feeding pipe and mud drainage. In this method, a series of connected porous pipes are buried in the ground while excavated soil is discharged through these pipes without sequentially connecting mud feeding and draining pipes.

Therefore, after burying the lead pipe or temporary pipe underground in advance,
Without having to replace these lead pipes, temporary pipes, etc. with perforated pipes, perforated pipes can be successively buried in the ground using the advanced propulsion method, and regardless of the diameter of the perforated pipes. This allows for propulsion and burying work.

〔Example〕

To explain the embodiment of the present invention with reference to the drawings, in Figs. 1 and 2, (1) is a perforated pipe buried underground;
Inside the hume pipe (2) for normal propulsion methods, a small diameter pipe body (3) is arranged in the center between both ends, and a plurality of small diameter pipe bodies (3) are arranged around the outer circumference with this small diameter pipe body (3) in the center. The small diameter pipe bodies (4) (4)...(4) are arranged in parallel at predetermined intervals in the circumferential direction, and the outer circumferential surface of these small diameter pipe bodies (3) (4) and the humid pipe (2) are arranged in parallel at predetermined intervals in the circumferential direction. Filling material (5) is filled into the gap between the inner circumferential surface of
(4), a hole for wiring, etc. is provided between both end faces, and during propulsion, the center hole (3)
A) is a surveying hole, and multiple holes (4゛) are provided on the outer periphery.
Of these, any two holes are configured to be used as a mud feeding pipe (4a) and a mud draining pipe (4b), respectively.

In the perforated pipe (1) formed in this way, the humid pipe (2) may be a concrete pipe, a steel pipe, or a ceramic pipe, and the small diameter pipe bodies (3) and (4) may be an asbestos pipe or a chloride pipe. It may be a vinyl pipe, a ceramic pipe, or a steel pipe.

Furthermore, the through-holes (3a) (4'') are formed not by the small-diameter tubes (3) and (4), but when manufacturing the cylindrical block body, as shown in FIG. Holes (3a) and (4') may be formed in the outer peripheral portion so as to extend between both end faces.

Such a block body and the filling material (5) are made of a lightweight solidified material such as foamed mortar, foamed concrete, lightweight concrete, or foamed polystyrene, and the specific gravity of the entire perforated pipe (1) is equal to the specific gravity of the target ground in which it is to be buried. They are formed to be equal to or slightly smaller in size so that they are propelled without sinking due to their own weight during propulsion.

In addition, as shown in Fig. 4, in addition to the center hole (3a) and the plurality of holes (4°) provided on the outer periphery, an anti-friction material injection hole (6) with a smaller diameter than these holes is provided. It is desirable that a groove (7) of an appropriate depth be provided at an appropriate location on the outer peripheral surface of the perforated pipe (1) over the entire length, and the wiring of the excavator (8) or the like should be placed in this groove (7). It is preferable to close the open end with a lid (9) after storing the signal line or hydraulic hose.

In addition, when the tube body of the perforated tube (1) is formed of a hume tube (2), the end surface of the filler (5) filled inside is curved into a concave arc shape, as shown in Fig. 5. By forming the plane 0ω, the propulsive force can be transmitted only through the end face of the hume tube (2).

In Fig. 6, 01) is a connecting membrane peripheral part formed with notches on the outer peripheral surface of both ends of the perforated pipe (1), and when the pipes are joined, a steel collar whose outer diameter is approximately the same as that of the perforated pipe (1) is used. 02) is fitted onto the stepped peripheral portions 01) (II) of the opposing porous pipes (1) (1) via rubber seals 03) (13).

This steel collar (121) may be separate from the perforated pipe (1), but its hand portion is fitted and fixed to the same level part (11) of one of the perforated pipes (1) to create an extraneous part. You may leave it prominent.

Further, the small diameter tube bodies (3) (4) forming the porous holes (3a) (4') of the porous tube (1) are removed by an appropriate length at both ends to form the porous holes (3a) (4'). The end face of the open end is immersed into the perforated pipe (1), and the perforated pipe (
3a) At one opening of (4'), the inner diameter is a small diameter tube (
3) Fit a short tube with an outer diameter equal to the outer diameter of (4), and make the open end surface of this short tube flush with the end surface of the porous tube (1).

Furthermore, a short pipe side whose inner diameter is larger than the outer diameter of the small diameter pipe body (3) (4) is fitted into the other open end of the porous hole (3a) (4°), and the porous hole to be connected is The opposing short tubes 04 and 09 of the tubes (1) and (1) are connected so as to be bendable by a nipple θω formed to have the same inner and outer diameters as those of the small diameter tube bodies (3 and 4).

07) is a water-stopping rubber ring attached to the end face of the porous pipe (1), which expands with water to bring the joint end faces of the perforated pipes into close contact with each other in a watertight state.

In order to bury the perforated pipe (1) constructed in this way underground using the muddy propulsion method, as shown in Figure 7, the ground is excavated from the starting shaft 0 using a muddy shield excavator (8). When moving, the perforated pipe (
1) and a hole (
Among 4), any two holes are used as the sludge feeding pipe (4a) and the sludge draining pipe (4b), and these sludge feeding and draining pipes (4)
a) Joint pipes (21a) (21b), (22a) having valves (19a) (19b), (20a) (20b) at the front end opening and rear end opening of (4b), respectively.
22b) are removably fitted and communicated with each other, and the front joint pipes (21a) and (21b) are provided inside the excavator (8). At the same time, the joint pipes (22a) and (22b) on the rear side are connected to a mud supply hose (25a) and a mud removal hose (25b), respectively, which are connected to a soil storage tank (24) installed on the ground.
Let's communicate.

As is well known, the excavator (8) has a mud chamber (29) formed between the back of the cutter vi (27), which is rotationally driven by a motor (26), and a bulkhead (28) that partitions the inside of the machine. The mud feeding pipe (23a) and the mud draining pipe (23b) are communicated with the mud chamber (29).

After establishing communication between the excavator (8) and the earth and sand storage tank (24) through the mud supply and drainage pipes (4a) and (4b) of the perforated pipe (1), By bringing a spacer member (30) into contact with the shaft 00, supporting a plurality of propulsion jacks (32) on the reaction force support wall material (31) arranged on the wall of the shaft 00, and operating the jacks (32). While excavating the ground by propelling the perforated pipe (1) and rotating the cutter plate (27) of the excavator (8), the excavator (
8) is propelled together with the perforated pipe (1).

In addition, a laser beam is reflected by a laser oscillator or the like installed in the starting shaft 08) through the center hole (3a) of the perforated pipe (1) to a surveying device (not shown) installed in the center of the excavator (8). The perforated tube (1) is propelled in a predetermined direction while moving.

On the other hand, water in the earth and sand storage tank (24) is pumped through the mud supply hose (25a).
) of the porous pipe (1) by driving the pump (33) installed on the mud feeding hose (25a).
) from the cough pipe (4a) to the joint pipe (21a).
, the mud chamber (
The excavated soil filled in the mud chamber (29) is removed from the porous pipe (1) by driving the pump (34) installed in the mud drainage pipe (23b). Pipeline (4
b) is discharged together with muddy water into the mud storage tank (24) through the mud removal hose (25b).

The earth and sand settles in this upper sand storage tank (24) and separates from the muddy water, and the muddy water passes through the muddy hose (25a) again to the excavator (
8) is sent to the mud room (29) side, and the excavated soil is carried out while flowing back through the mud feeding pipe.

In this way, when the perforated pipe (]) of a certain length is used as a propulsion force, the rear joint pipes (22a) (22b) are moved to the perforated pipe ().
Remove the sludge feed/discharge pipes (4a) and (4b) from 1) from the rear ends, and connect the next porous pipe (1).

This connection is made using a rubber seal Q3) between the stepped peripheral portions OD (I) provided on the outer peripheral surfaces of the opposite ends of both porous pipes (IHI)
This is done by fitting a steel collar 0 through the (13) and connecting the opposing reciprocations (3a) (4°) (4a) and (4b) with a nipple 06). ) Connect the replies provided in (1) so that they match on the same center line.

Furthermore, a joint pipe (22a) is installed at the rear end opening of the mud feeding/discharging pipe (4a) (4b) of the porous pipe (1) that has been added in this way.
After connecting the excavator (22b), do the same as above.
) is operated and the perforated pipes (1) (1
) The jack (32) is operated while muddy water is returned between the earth and sand storage tank (24) and the mud chamber (29) of the excavator (8) through the mud supply and drainage pipes (4a) and (4b) of the porous pipe (4b). 1
) to promote burial.

Repeat this process to connect the perforated pipes (1) one after another.
A pipe body consisting of a plurality of porous pipes (1) (1)...(1) connected in series is buried between the starting shaft 08) and the arrival shaft (35).

The porous pipe (1) buried in this way is connected to the mud feeding/discharging pipe (4a
) The other holes, including the hole used as (4b), are used for cable wiring, etc.

In addition, in the above embodiment, one of the plurality of holes drilled in the outer circumferential surface of the porous pipe (1) is used as the mud feeding pipe,
Although the other hole was used as the sludge draining pipe, any two or more holes may be used as the sludge feeding pipe and the sludge draining pipe, respectively.

〔Effect of the invention〕

As described above, according to the perforated pipe propulsion burying method of the present invention,
In a construction method in which a perforated pipe of a certain length, which is formed by penetrating holes in multiple places that communicate between both ends, is pushed into the ground while being sequentially connected, any two or more holes that are communicated by the connection are It is used as a mud pipe and a mud removal pipe, and is characterized by propelling and burying a series of porous pipes underground using the muddy water propulsion method. It is possible to completely eliminate the work to connect mud conveyance and drainage pipes, which is done previously, and after burying lead pipes and temporary pipes underground in advance, these lead pipes and temporary pipes can be connected to porous pipes. The perforated pipes can be successively buried in the ground using the same method without replacing the pipe, and the work can be carried out regardless of the diameter of the perforated pipe. This can be done efficiently, significantly shortening the construction period, and reducing construction costs and labor.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a simplified vertical side view showing the connection state of the perforated pipe, FIG. 2 is a vertical cross-sectional front view of the perforated pipe, and FIGS. A vertical front view showing a modified example; FIG. 5 is a vertical side view showing the rear shape of the porous pipe;
FIG. 6 is an enlarged vertical side view of a part showing the connected state, FIG. 7 is a simplified vertical side view showing the construction state, and FIG. 8 is a simplified vertical side view showing the conventional muddy shield construction method. (1)...Porous pipe, (3a)...Center hole, (4a)
...Sludge feeding pipe, (4b)...Sludge removal pipe, (8)...
・Excavator, θ...Steel collar, 06)...Nipple, θ...Starting shaft. Think 1 1shiΔ Go to Think 2 Go to 5

Claims (2)

[Claims] (1) In a construction method in which a perforated pipe of a certain length, which is formed by penetrating a plurality of holes that communicate between both ends, is pushed into the ground while being sequentially connected, any two or more locations that communicate through the connection are A method for propelling and burying a perforated pipe, which is characterized by using the holes as a sludge feed pipe and a sludge removal pipe, respectively, and burying a series of perforated pipes underground using a muddy water propulsion method. (2) Claim (1) characterized in that the hole penetrated through the center of the perforated pipe is used as a surveying hole when the perforated pipe is propelled.
The perforated pipe burying method described above.