JPH0581717B2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a method for driving and burying perforated pipes 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]

Traditionally, as a method of burying perforated pipes of a certain length into the ground by successively adding them, for example, as described in the Japanese Patent Publication No. 59-49772 method, first a lead pipe with a built-in excavator is launched. It is dug into the ground from the shaft side, and temporary pipes with a built-in earth removal device are successively connected to this leading pipe, and the leading pipe reaches the destination shaft side while discharging earth and sand. It is possible to bury a series of perforated pipes underground by making the pipes follow and propelling them again, pushing out the temporary pipes one after another toward the starting shaft, and pushing the perforated pipes one after another to replace the temporary pipes and the perforated pipes. It is being said.

On the other hand, as shown in Fig. 8, a large-diameter pipe b is followed by a muddy shield excavator a, and is propelled and buried underground, and then a plurality of small-diameter pipes are arranged inside the large-diameter pipe. , a method of filling the void with concrete, etc., has also been adopted.

[Problem to be solved by the invention]

However, according to the former method of burying perforated pipes, a temporary pipe is first temporarily buried between the starting shaft and the destination shaft, and then the temporary pipe is replaced with a perforated pipe, which requires a long period of construction work. There are problems in that it not only takes a long time, but also costs a lot of work.Furthermore, it requires work such as removing the temporary pipes, which requires a significant 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, the length of the large-diameter pipe must be changed each time a certain length of large-diameter pipe is buried. Not only does it require a long period of work to connect the sludge pipe C and the sludge drain pipe d, which corresponds to the above method, but the installation work for the small-diameter pipe must be done manually inside the large-diameter pipe. Therefore, there is a problem that it is necessary to use a pipe with a larger diameter than necessary.

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 provides a peripheral step for connection on the outer circumferential surface of the front end of the hume pipe, and also provides a peripheral step for connection on the outer circumferential surface of the rear end than the rear end surface of the hume pipe. A rearwardly protruding collar is provided, and a plurality of small diameter holes are provided in the hume tube, penetrating between both front and rear end surfaces of the hume tube, and having front and rear open ends flush with both front and rear end surfaces of the hume tube. In a construction method in which perforated pipes arranged in parallel are successively connected and buried underground, the collar protruding from the rear end of the preceding perforated pipe is attached to the collar provided on the outer circumferential surface of the front end of the subsequent perforated pipe. The stepped portion is bent through the seal, and the front and rear portions of the nipple are respectively inserted between the opposing openings of the mutually communicating small-diameter holes of the front and rear porous tubes, and the nipples are inserted into the front and rear small-diameter holes through the nipples. When the perforated pipes are successively connected in this way and the rear end surface of the last perforated pipe is pushed and buried, the series is used for wiring etc. after burying. Among the plurality of small-diameter holes that communicate with each other, any two or more small-diameter holes are used as a sludge feed pipe and a sludge removal pipe, respectively, and a series of perforated pipes are connected to each other by a slurry propulsion method. The invention is characterized in that it is propelled and buried underground while allowing refraction through the collar connected to the nipple and the nipple connected to the small-diameter holes.

[Effect]

When using the mud propulsion method to propel mud into the ground while sequentially connecting perforated pipes of a certain length, mud can be pumped through any hole among the multiple holes that communicate with each other through the connections. Used for pipes and sludge removal pipes,
This system buries a series of connected perforated pipes underground while discharging excavated soil through these pipes without sequentially connecting mud feeding and draining pipes.

Therefore, after burying lead pipes, temporary pipes, etc. in the ground in advance, wiring can be carried out after burying using a one-time propulsion method without having to replace these lead pipes, temporary pipes, etc. with porous pipes. It is possible to sequentially push and bury porous pipes used for purposes, etc. underground, and to carry out the push and bury work regardless of the diameter of the porous pipes. Since the small-diameter holes are connected so as to be bent and connected, the direction can be easily corrected and a desired curved construction can be performed.

〔Example〕

Embodiments of the present invention will be explained with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a porous pipe to be buried underground. Normally, inside a fume pipe 2 for propulsion method, there is a hole between both ends in the center of the pipe. A small diameter tubular body 3 is disposed over the area, and a plurality of small diameter tubular bodies 4, 4...4 are disposed in parallel at predetermined intervals in the circumferential direction around the small diameter tubular body 3 in the center. Filling material 5 is filled into the gap between the outer circumferential surface of the small-diameter tubes 3 and 4 and the inner circumferential surface of the fume pipe 2, and the filling material 5 is solidified, and the small-diameter tubes 3 and 4 are used to fill the gap between both end surfaces. It is equipped with holes for connecting wiring, etc., and during propulsion, the hole 3a in the center is used as a surveying hole, and any two holes 4' formed on the outer periphery are used. The holes are configured to be used for the sludge feeding pipe 4a and the sludge removal pipe 4b, respectively.

In the perforated pipe 1 formed in this manner, the hume 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, a vinyl chloride pipe, a ceramic pipe, or a steel pipe. It may be either.

Furthermore, the through holes 3a, 4' are formed without using the small diameter tubes 3, 4, as shown in FIG.
When manufacturing a cylindrical block body, holes 3a and 4' may be formed in the center and outer circumferential portion thereof 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, and foamed polystyrene.
The perforated pipe 1 is formed so that its overall specific gravity is equal to or slightly smaller than the specific gravity of the target ground in which it is to be buried, so that when it is propelled, it is propelled without sinking due to its own weight.

In addition, as shown in FIG. 4, it is desirable to provide an anti-friction material injection hole 6 with a smaller diameter than these holes in addition to the center hole 3a and the plurality of holes 4' provided on the outer periphery. A groove 7 of an appropriate depth is provided at a suitable location on the outer circumferential surface of the perforated pipe 1 over the entire length, and after storing the wiring of the excavator 8, a signal line, a hydraulic hose, etc. in this groove 7, the open end of the groove 7 is placed. It is preferable to close it with a lid 9.

Further, when the tube body of the porous tube 1 is formed of a hume tube 2, the end surface of the filler 5 filled inside can be formed into a concave curved surface 10, as shown in FIG. For example, the propulsive force can be transmitted only through the end face of the hume tube 2.

In FIG. 6, reference numeral 11 denotes a connecting stepped peripheral portion formed with a notch on the outer peripheral surface of both ends of the perforated pipe 1, and a steel collar 12 having an outer diameter approximately the same as that of the perforated pipe 1 is attached to the perforated pipes 1, 1 facing each other. Rubber seals 13, 1 on the stepped peripheral parts 11, 11
3 to be fitted.

In this case, the first half of the steel collar 12 is fitted onto and fixed to the step circumference 11 on the rear end side of the porous tube 1, with the second half protruding rearward.

Also, both ends of the small-diameter tube bodies 3, 4 forming the holes 3a, 4' of the porous tube 1 are removed by an appropriate length, and the end surfaces thereof are connected to the porous tube 1 from the open ends of the holes 3a, 4'. Each hole 3a, 4'
A short tube 14 having an inner diameter equal to the outer diameter of the small-diameter tubes 3 and 4 is fitted into one opening of the tube, and the opening end surface of the short tube 14 is made flush with the end surface of the porous tube 1. Further, a short pipe 15 having an inner diameter larger than the outer diameter of the small-diameter pipe bodies 3, 4 is fitted into the other open end of each hole 3a, 4'. The opposing short tubes 14 and 15 are connected so as to be bendable by a nipple 16 which is formed to have the same inner and outer diameters as the small diameter tube bodies 3 and 4. This nipple 16 is inserted into the rear end of each small-diameter hole 3, 4 of the preceding porous tube 1 when connecting the subsequent porous tube 1.

Reference numeral 17 denotes 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 porous pipes into close contact with each other in a watertight state.

In order to bury the perforated pipe 1 constructed in this manner underground by the mud propulsion method, the ground is excavated from the starting shaft 18 with a mud shield excavator 8, as shown in FIG. When drilling, connect the perforated pipe 1 to the rear end of the excavator 8, and connect any two holes of the holes 4 penetrated through the outer periphery of the perforated pipe 1 to the mud supply pipe 4a and the mud removal pipe. Joint pipes 21a, 21b, 22a, 22b, which are used as pipes 4b and have valves 19a, 19b, 20a, 20b, are attached to and removed from the front and rear end openings of these mud feeding and draining pipes 4a and 4b, respectively. Furthermore, the front joint pipes 21a and 21b are connected to the mud feeding pipe 23a and mud removal pipe 23b provided in the excavator 8, and the rear joint pipes 22a and 22b are connected freely. It is connected and communicated with a mud feeding hose 25a and a mud draining hose 25b, which are connected to a dirt storage tank 24 installed on the ground.

As is well known, the excavator 8 has a muddy water chamber 29 formed between the back of a cutter plate 27 that is rotationally driven by a motor 26 and a partition wall 28 that partitions the inside of the machine, and the muddy water chamber 29 is The mud pipe 23a and the mud drainage pipe 23b are communicated with each other.

After establishing communication between the excavator 8 and the earth and sand storage tank 24 through the mud feeding and draining pipes 4a and 4b of the perforated pipe 1, the spacer member 30 is brought into contact with the back surface of the perforated pipe 1, and the vertical shaft 18 is brought into contact with the spacer member 30. A plurality of propulsion jacks 32 are supported by the reaction force supporting wall material 31 disposed on the wall surface, and by operating the jacks 32, the perforated pipe 1 is propelled, and the cutter plate 27 of the excavator 8 is rotated to remove the ground. The excavator 8 is propelled together with the perforated pipe 1 while excavating the hole.

Note that the porous tube 1 is moved to a predetermined position while reflecting a laser beam through the center hole 3a of the porous tube 1 to a surveying device (not shown) installed in the center of the excavator 8 using a laser oscillator or the like installed in the starting shaft 18. The goal is to move people in that direction.

On the other hand, the water in the earth and sand storage tank 24 is fed by the mud feeding hose 25.
The mud is supplied to the excavator 8 through the pipe 4a through the joint pipe 21a and the mud transport pipe 23a by driving the pump 33 disposed on the mud transport hose 25a. The mud chamber 29 is filled with the excavated soil taken into the mud chamber 29, and the pump 34 disposed in the mud drain pipe 23b is driven to discharge the excavated soil together with the mud water into the mud drain pipe 4b of the porous pipe 1. It is made to flow out into the earth and sand storage tank 24 through the mud removal hose 25b.

The earth and sand settle in this earth and sand storage tank 24 and are separated from the muddy water, and the muddy water is again sent to the muddy water chamber 29 side of the excavator 8 through the mud feeding hose 25a, and the excavated earth and sand is carried out while flowing back through the mud feeding pipe. It is something.

In this way, when the perforated pipe 1 of a certain length is propelled and buried, the rear joint pipes 22a and 22b are removed from the rear ends of the mud feeding and draining pipes 4a and 4b of the perforated pipe 1,
Connect the next porous tube 1.

For this connection, a rubber seal is placed between the stepped peripheral parts 11, 11 provided on the outer peripheral surfaces of the opposite ends of both the porous tubes 1, 1.
This is done by fitting the steel collar 12 through the holes 3 and 13 and connecting the opposing holes 3a, 4', 4a, and 4b with nipples 16, which are provided in both the perforated tubes 1 and 1. Connect the holes so that they match on the same center line.

Furthermore, the joint pipes 22a, 2 are connected to the rear end openings of the mud feeding/discharging pipes 4a, 4b of the porous pipe 1 that has been added in this way.
2b is connected, the excavator 8 is operated in the same manner as described above, and the mud storage tank 24 and the mud chamber 29 of the excavator 8 are connected through the mud supply and drainage pipes 4a and 4b of the perforated pipes 1 and 1, which are connected in series. The jack 32 is actuated to propel and bury the porous pipe 1 while circulating muddy water.

By repeating this operation, the perforated pipes 1 are successively connected, and a pipe body consisting of a plurality of perforated pipes 1, 1, . . . 1 connected in series is buried between the starting shaft 18 and the reaching shaft 35.

The porous pipe 1 buried in this way
The other holes, including the holes used as holes a and 4b, are used for cable wiring, etc.

In the above embodiment, one of the plurality of holes drilled on the outer circumferential surface of the porous pipe 1 was used as the mud feeding pipe and the other was used as the mud draining pipe, but any two holes could be used. More than one hole may be used as a sludge feeding pipe and a sludge draining pipe, respectively.

〔Effect of the invention〕

As described above, according to the perforated pipe propulsion burying method of the present invention, a peripheral step for connection is provided on the outer circumferential surface of the front end of the hume pipe, and a connecting step is provided on the outer circumferential surface of the rear end of the hume pipe. A protruding collar is provided, and a plurality of small diameter holes are provided in parallel in this hume tube, passing through between both front and rear end surfaces of the hume tube, and having front and rear open ends flush with both front and rear end surfaces of the hume tube. In a construction method in which perforated pipes are connected and buried in the ground in sequence, the circumferential step provided on the outer peripheral surface of the front end of the perforated pipe following the rear end of the preceding perforated pipe or the protruding collar is Since the collar is inserted so that it can be bent through the seal, the free end of the collar that is inserted into the outer circumferential surface of the front end of the following porous pipe is open to the rear. The collar can be smoothly pushed and buried without dirt or the like getting stuck between the open end and the porous pipe and causing the collar to curl up.

Furthermore, the front and rear portions of the nipple are respectively inserted between the opposing openings of the small-diameter holes that communicate with each other in the front and rear porous tubes, and the front and rear small-diameter holes are bendably connected and communicated through the nipple, so that the above-mentioned collar can be used. Due to the bendable connection between the outer peripheries of the front and rear porous tubes, it is possible to easily bend the plurality of opposing small-diameter holes in the front and back, making it easy to correct the direction in which the tube is buried. This makes it possible to construct a desired curved line.

Moreover, the plurality of small diameter holes provided in the porous tube have their front and rear opening ends flush with both the front and rear end surfaces of the porous tube without protruding from the end surface of the porous tube, and the rear end surface of the rearmost porous tube. Since the nipple is attached to the tube after propulsion, the propulsive force of the tube body can be reliably and smoothly transmitted to each porous tube by using the rear end surface of the porous tube as a pressing surface.

In addition, when the porous pipes are successively connected and buried in this way, among the plurality of small-diameter holes that communicate in series and are used for wiring etc. after burial,
Two or more arbitrary small-diameter holes are used as a sludge feed pipe and a sludge removal pipe, respectively, and the small-diameter holes are connected to the above-mentioned collar in which a series of porous pipes are connected to each other using the mud propulsion method. Since the system is propelled and buried underground while allowing bending through the nipple, it completely eliminates the work to connect the slurry pipe, which is conventionally done every time a pipe of a certain length is pushed and buried. In addition, it is possible to bury lead pipes, temporary pipes, etc. underground in advance, and then bury them using a one-time propulsion method without having to replace these lead pipes, temporary pipes, etc. with porous pipes. Porous pipes having a plurality of small-diameter holes to be used later for wiring etc. can be sequentially propelled and buried while using the small-diameter holes as a sludge feed pipe and a sludge removal pipe. It can be carried out efficiently and can significantly shorten the construction period, as well as reduce construction costs and labor. Furthermore, since the hume tube constituting the porous tube and the small-diameter holes therein are connected so as to be bent and connected, the direction can be easily corrected and a desired curved construction is possible.

[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. 5 is a vertical sectional front view showing a modified example, FIG. 5 is a vertical sectional side view showing the rear shape of the perforated pipe, FIG. 6 is a partially enlarged vertical sectional side view showing the connection state, and FIG. 7 is a simplified vertical sectional side view showing the construction state. 8 are simplified longitudinal sectional side views showing the conventional muddy water shield construction method. 1... Porous pipe, 3a... Center hole, 4a... Sludge feeding pipe, 4b... Sludge removal pipe, 8... Excavator, 12...
...Steel collar, 16...Nitsupuru, 18...Starting shaft.

Claims (1)

[Claims] 1. A connecting peripheral step is provided on the outer circumferential surface of the front end of the hume tube, and a collar is provided on the outer circumferential surface of the rear end that protrudes rearward from the rear end surface of the hume tube. The perforated pipes, each consisting of a plurality of small-diameter holes that penetrate between the front and rear end surfaces of the pipe and whose front and rear open ends are flush with the front and rear end faces of the hume pipe, are successively connected and buried underground. In the construction method, the circumferential step provided on the outer circumferential surface of the front end of the succeeding perforated pipe is bendably inserted into the collar protruding from the rear end of the preceding perforated pipe through a seal, and the front and rear perforated pipes are bent. The front and rear portions of the nipple are respectively inserted between the opposing openings of the small-diameter holes that communicate with each other, and the front and rear small-diameter holes are bendably connected and communicated through the nipple, and in this way, the multi-hole pipes are sequentially connected. At the same time, when burying is carried out by pressing the rear end face of the rearmost porous pipe, any two or more of the plurality of small-diameter holes connected in series used for wiring etc. after burying are Small-diameter holes are used as the sludge-feeding pipe and sludge-removal pipe, respectively, and a series of perforated pipes are refracted through the above-mentioned collar, which connects the pipes, and nipples, which connect the small-diameter holes, using the mud propulsion method. A porous pipe burying method characterized by pushing and burying a porous pipe underground while allowing.