JPH0631540B2 - Tube for propulsion burying - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pipe body such as an electric wire laying pipe or a gas or water pipe which is buried in the ground by a propulsion method.

(Prior Art) Conventionally, when wiring an electric wire, a telephone wire, or the like in the ground, a plurality of pipes having a small diameter are embedded in the ground in a parallel state, and then wiring is performed in the pipes. There is.

As a method of burying these pipes in the ground, after excavating a groove in the ground, a plurality of small-diameter pipes are laid in the groove in parallel vertically and horizontally, and the gap between adjacent pipes is formed. Backfill with concrete in a state where the pipes are protected by filling them with concrete, or concrete blocks made by embedding multiple small-diameter pipes in parallel between both end faces are butted against each other in the excavation groove. After connecting while keeping the state, backfilling, or after burying a large diameter fume pipe in the ground by the propulsion method, arranging multiple small diameter pipes in the fume pipe and filling the voids with concrete, etc. Has been adopted.

(Problems to be Solved by the Invention) However, according to the method of laying a small-diameter pipe body in the groove or the method of laying a concrete block body having a plurality of small-diameter pipe bodies in the groove, According to the method of burying a fume pipe and arranging a small-diameter pipe body in the fume pipe after the road etc. has to be cut and cut, traffic obstacles occur and a long construction period is required. Since the work of burying the fume pipe and the work of arranging the small-diameter pipe must be performed separately, a long-term work is required in the same manner as described above. Since it is performed inside the pipe, it is inevitable that a fume pipe having a larger diameter than necessary is used. Furthermore, when burying in the ground by the propulsion method while sequentially connecting large diameter pipes with multiple small diameter pipes arranged inside, the small diameter pipes are connected rigidly. However, there is a problem that it is not suitable for direction correction and curve construction.

The present invention solves such problems and allows a plurality of small-diameter pipes to be embedded at a time by the propulsion method while enabling direction correction and curved construction. Is provided.

(Means for Solving Problems) In order to achieve the above-mentioned object, the propulsion and embedding pipe body of the present invention penetrates a plurality of small-diameter holes across both end faces in a solid pipe main body, A porous tube body formed by projecting a collar on the outer peripheral surface of one end of the pipe main body in the length direction of the pipe and sealing the collar when the pipes are connected to the outer peripheral surface of the other end. A stepped peripheral portion that is flexibly fitted through a material is provided, and further, diametrically enlarged openings for nipple insertion are provided at both ends of each of the small diameter holes, and one of the small diameter openings is provided with the small diameter hole. When inserting one half of a nipple having substantially the same inner diameter and connecting the tubes, the other half of the nipple is inserted into the diametrical expansion opening for fitting the nipple of the other tube, and each small hole Is configured to be bendably connected via the nipple.

(Operation) Before and after the small-diameter holes that are arranged in parallel in the pipe body while connecting the step peripheral part of the front end outer peripheral surface of the pipe main body that is connected to the rear end outer peripheral surface of the preceding pipe main body The opposite ends are connected via a nipple so that they can be bent, and the pipe main body is sequentially buried in the ground by a propulsion method.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 3, (1) is mainly a pipe, and a plurality of small diameters are provided inside a normal fume pipe for propulsion method (2). Tube (3) (3) ・ ・ ・
(3) are arranged in parallel at a predetermined interval from each other, and the space (4) between the outer peripheral surface of these pipes (3) and the inner peripheral surface of the fume tube (2) is filled and solidified. Let the tube body (3) fume tube (2)
It is integrated with.

In the tube body (1) formed in this way, the fume tube (2)
May be a concrete pipe, a steel pipe, or a ceramic pipe. As clearly shown in the sectional view of FIG. 8, the small-diameter pipe body (3) is an asbestos pipe, a vinyl chloride pipe, a ceramic pipe. , Or a steel pipe. Also, such a small-diameter pipe body (3)
Since it is provided to form a plurality of small diameter holes (13) inside the fume tube (2), as shown in FIG. A plurality of small-diameter holes (13) may be formed in a block-shaped body so as to extend between both end faces.

Further, such a block body or the filling material (4)
Is made of lightweight solidified material such as expanded mortar, expanded concrete, lightweight concrete, Styrofoam, etc.
The specific gravity of the whole of (1) is made small so that when propelling the tubular body, it will not be propelled while sinking due to its own weight.

(5) is a connecting step peripheral part formed by notching the outer peripheral surfaces of both ends of the fume pipe (2), and a steel collar (6) whose outer diameter is approximately the same as that of the pipe main body (1) when joining the pipe bodies. The stepped peripheral portions (5) and (5) facing each other are fitted via rubber seals (7) and (7). This steel collar (6) may be separate from the fitting main body (1), but one half of the collar (6) is fitted and fixed to the step main body (5) to be integrated with the pipe main body (1). It may be provided in.

The small-diameter pipe body (3) is shorter than the length of the pipe main body (1), and both ends of the pipe main body (1) are sunk into the inside from both end faces and the inner diameter of one opening outer peripheral surface is Small Diameter Tubular (3)
A short tube (8) having the same outer diameter as that of the short tube (8) is fitted, and the open end surface of the short tube (8) is flush with the end surface of the fume tube (2). Further, a short pipe (9) having a diameter larger than the outer diameter of the small diameter pipe (3) is fitted between the other open end of the small diameter pipe (3) and the end face of the pipe main body (1). The short pipes (8) and (9) form a connecting portion that can be bent and connected through the nipple (10).

The nipple (10) has the same inner diameter as that of the small-diameter pipe (3), and the front half of the nipple (10) is inserted into the rear end side short pipe (8) of the pipe main body (1) that precedes during the propulsion. Is inserted into the short pipe (9) on the front end side of the succeeding pipe main body (1), and both end faces are small-diameter pipe bodies (3) (3)
The rubber ring (11) having elasticity is interposed in the gap between the outer periphery of the latter half and the inner peripheral surface of the short pipe (9).

(12) is an annular groove recessed in the fume pipe (2) and the filler (4) on the front end face or the rear end face of the pipe main body (1), and a rubber ring (14) for water stoppage that fits with water is fitted. I am doing it.

With this structure, the pipe main body (1)
When burying in the ground while sequentially connecting the pipes, a rubber seal is provided between the step peripheral portions (5) and (5) provided on the outer peripheral surfaces of the opposing end portions of the leading pipe body (1) and the succeeding pipe body (1). (7) Insert the steel collar (6) through (7) and connect between the short pipes (8) and (9) connected to the open ends of the small-diameter pipes (3) (3) facing each other. After being connected with the nipple (10), it is to be propelled.

When the direction is corrected at the time of propelling the pipe body, both pipe main bodies (1) (1) are bent at the joint part, but in this case, the connecting step peripheral parts (5) (5) formed by notching on the outer peripheral surfaces of both ends. A steel collar (6) is fitted in between, and a rubber seal is provided between the facing surfaces of the collar (6) and the stepped portion (5).
(7) Since the (7) is interposed, the outer peripheral surface of the pipe main body (1) freely bends and slides with respect to the collar (6) and joins between the small diameter pipe bodies (3) and (3). Part also slides on the nipple (10) and the latter half of the nipple (10) is a short pipe on the side of the following pipe body (1).
(9) Since it is movable toward the inner peripheral surface side, it is possible to perform refraction at the joint portion, and further, the pipe main body (1) (1)
Water can be reliably stopped by the expansion of the rubber ring (14) provided between the opposing surfaces of the.

4 to 6 show another means for connecting the small-diameter pipes (3) and (3) facing each other in a bendable manner. FIG. 4 shows the small-diameter pipe on the side of the preceding pipe main body (1). A frustoconical fitting hole that gradually increases in diameter from the opening of the tube (3) toward the rear between the rear end faces.
While providing (15), the small diameter pipe body (3) of the following pipe main body (1)
The rear end of the short pipe (8) is integrally fitted to the outer circumference of the front end of the, and the nipple (10) is inserted into the inner peripheral surface of the short pipe (8) and the outer peripheral surface of the front part of the nipple (10) is also fitted. The rubber ring (16) attached to the above is pressed against the inner peripheral surface of the frustoconical fitting hole (15).

Fig. 5 shows that short pipes (8) and (8) are fitted on the outer peripheral surfaces of the ends of the small-diameter pipes (3) and (3) that face each other, and A nipple (17) made of a stretchable rubber tube or a flexible tube such as a bellows is interposed between the end faces of the small diameter pipes (3) (3), and both ends of the nipple (17) are connected to the small diameter pipe body. (3) It is fixed to the end face of (3).

FIG. 6 is a modification of the means shown in FIG. 3, which is a structure in which the short pipe (8) is not used.

In the above embodiment, the plurality of small-diameter pipes (3) arranged side by side in the pipe main body (1) are mainly used for wiring, but in the prefabricated pipe as shown in FIG. The present invention can also be adopted.

In the figure, the pipe main body (1) is adopted as a buried pipe in the muddy water propulsion method, and has a small diameter fixed in parallel with a filling material (4) such as foam mortar in the fume pipe (2). Of the pipes (3) (3), the central small-diameter pipe (3) is a surveying hole, and the outer peripheral small-diameter pipe (3) (3) is used as a sending and sludge pipe, Further, a groove (18) having a depth reaching the filling material (4) is provided in an appropriate place of the fume pipe (2), and wiring of the excavator, a signal line, a hydraulic hose, etc. are provided in the groove (18). After the housing is accommodated, its open end is closed by a lid (19), and the joints at both ends of this pipe main body (1) are constructed in the same manner as in the above-mentioned embodiment. Further, this pipe main body (1) is provided with an antifriction material injection hole (20) having a diameter smaller than that of the small diameter pipe body (3), and between the pipe main body (1) and the ground through this injection hole (20). An anti-friction material is injected to reduce the frictional resistance when the tube is propelled.

In the above examples, the filling material (4) in which the small-diameter pipe body (3) was fixed in parallel in the fume pipe (2) was a lightweight material such as lightweight concrete, As shown in FIG. 10, both ends may be filled with normal concrete (21), and the reinforcing bars (22) may be embedded in those parts.

Further, as shown in FIG. 11, the end face of the pipe main body (1) is formed into a concave arc-shaped curved surface (23) from the outer peripheral edge toward the central part, and the propulsive force is applied to the fume pipe of the pipe main body (1). You may comprise so that it may transmit only by the end surface of (2).

(Effects of the Invention) As described above, the propulsion and embedding pipe body of the present invention is a porous pipe body formed by penetrating and forming a plurality of small-diameter holes in both ends of the solid pipe main body. A collar is projected on the outer peripheral surface of one end of the pipe main body in the length direction of the pipe, and when the pipes are connected to the outer peripheral surface of the other end, the collar is flexibly fitted through a sealing material. A stepped peripheral portion is provided, and further, enlarged opening portions for nipple insertion are provided at both ends of each of the small diameter holes, and one half portion of the nipple having substantially the same inner diameter as the small diameter hole is inserted into one opening portion. When fitting and connecting the tubes, the other half of the nipple is inserted into the expanded diameter opening for fitting the nipple of the other tube, and the small diameter holes are bendably connected via the nipples. Since it is configured like this, it becomes possible to bury the pipe body in the ground by the propulsion method and excavate the groove as in the past Compared with the method of laying the diameter pipe in the groove, the burying work can be done smoothly without causing obstacles to traffic, and the pipe is solid and there are a plurality of pipes in the interior between the end faces. Since each small-diameter hole is penetrated and formed, it is possible to connect a plurality of pipes in series one after another and at the same time make each small-diameter hole in series. It is possible to easily carry out construction work such as wiring.

Further, diametrical expansion openings for nipple insertion are provided at both ends of each of the small diameter holes, and one half of the nipple having the same inner diameter as the small diameter hole is inserted and attached to one of the large diameter openings. , Since the other half of the nipple is inserted into the other enlarged-diameter opening when the pipes are connected to each other, the small-diameter holes are configured to be bendably connected via the nipple, When the pipes are connected to each other, the nipples projecting from the enlarged-diameter openings of the small-diameter holes of the succeeding pipe body at the enlarged-diameter openings of the small-diameter holes of the preceding pipe body. By inserting and fitting, it is possible to simultaneously and easily connect all of the facing small-diameter holes, and furthermore, the nipple is not yet attached to the rear end surface of the rearmost tube body to be succeeded. Since only the expanded diameter opening is open, press it against the rear end surface of the tube. Tube propulsion work can be easily abutted against the wood and the like are intended to smooth and allows better efficiency.
In addition, the structure is such that the small diameter holes facing each other in the sequentially connected pipes are flexibly connected via the nipple,
The direction can be easily corrected when the pipe is propelled, and desired curve construction can be performed.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a simplified vertical sectional side view showing a connecting state of both pipes, FIG. 2 is a front view of a pipe main body, and FIG. 3 is a partially enlarged vertical sectional view of a connecting portion. Side views, FIGS. 4 to 6 are vertical sectional side views showing other aspects of the connecting portion, FIGS. 7 and 8 are vertical sectional front views showing the structure of the small-diameter holes, and FIG. FIG. 10 is a vertical sectional side view showing another embodiment of the internal structure of the pipe main body, and FIG. 11 is a simplified vertical sectional side view showing another shape of the end of the pipe main body. is there. (1) …… Mainly pipe, (2) …… Hume pipe, (3) …… Small-diameter pipe, (4) …… Filling material, (5) …… Coupling perimeter, (6) …… Steel collar, (8) (9) …… short pipe, (10) …… nipple, (13)…
... small bore.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References: 61-55571 (JP, U): 59-13783 (JP, U): 52-261 (JP, Y2)

Claims (1)

[Claims] 1. A perforated pipe body formed by penetrating a plurality of small-diameter holes between both end faces in a solid pipe main body, wherein the pipe length is provided on an outer peripheral surface of one end of the pipe main body. And a stepped peripheral portion for flexibly fitting the collar through a sealing material when connecting the pipes to the outer peripheral surface of the other end of the collar. A nipple insertion expanding diameter opening is provided at both ends of the nipple, and one half of the nipple having the same inner diameter as the small diameter hole is inserted into one expanding opening,
When connecting the tubes, the other half of the nipple is inserted into the expanded diameter opening for fitting the nipple of the other tube, and the small-diameter holes are configured to be bendably connected via the nipple. A pipe body for propulsion burying characterized by the above.