JPH11108246A - Underground buried pipe execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underground buried pipe execution method whereby shortening of a time for arranging an underground buried pipe can be attained. SOLUTION: In this execution method, a plurality of cable arranging underground buried pipes 1 having a female type joint 4 capable of being connected by providing a male-type joint 3 in one end and fitted to a male type joint 3 in the other end are previously integrally formed by support members 2..., this integrally formed underground buried pipe unit U is arranged along an arranging route. Of the arranged underground buried pipe unit U, between the specific fellow two underground buried pipe units U, U, a pair of bell mouth blocks 9 comprising a cylinder body 12 having a bell mouth part 10 in one end and a concrete-made block part 13 covering this cylinder body 12 are arranged in a condition with the bell mouth part 10 mutually facing the inside, the fellow underground buried pipes 1, 1 adjacent to each other in a longitudinal direction are connected by fitting by both the joints 3, 4. Each bell mouth block 9 and the joint 3 of the corresponding underground buried pipe unit are connected, in the periphery of the bell mouth block 9, by providing a wall body 20, a connection part 8 of hand hole, manhole, etc., is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to arranging underground pipes along an installation route and arranging a connecting portion such as a handhole or a manhole between two specific underground pipes. Underground buried pipe construction method.

[0002]

2. Description of the Related Art The underground pipe laying method will be described. First, a large number of underground pipes having a set length (for example, 5 m) are installed while being connected along an arrangement route. During the installation, the connection is made to a connection portion such as a handhole or a manhole which is provided in advance.

[0003] According to the above construction method, an underground pipe is installed while connecting a connection portion such as a handhole or a manhole, and connecting a large number of the underground pipes along an installation route. In order to immediately connect the underground pipes to be sequentially installed to the concrete connection part, the connection part must be installed in advance. The installation of this connection is generally performed while casting concrete at the site, and the work of assembling while placing concrete is troublesome and troublesome. It took a lot of time to set up.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is to provide a method of constructing an underground pipe capable of shortening the time required for disposing an underground pipe. On the point.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a female type which has a male joint at one end and which can be fitted and connected to the male joint at the other end. A plurality of underground pipes for arranging a plurality of cables having joints are previously integrated by a support member, and the integrated underground pipe unit is arranged along an installation route; A pair of bell mouth blocks each composed of a cylindrical body having a bell mouth part at one end and a concrete block part covering the cylindrical body between two specific underground pipe units of the unit group. Mouse parts are arranged with their insides facing each other, the underground pipes adjacent in the front-rear direction are connected to each other by fitting by the two joints, and each bell mouth block and the corresponding underground pipe unit Connect the bell mouth block with the fitting By providing a wall around is to configure a connection portion such as a hand hole or manhole. Therefore, the underground pipe units are arranged along the installation route, and a specific 2
By arranging a pair of concrete bellmouth blocks between the two underground pipe units, the front and rear walls of the connecting portion can be formed, and the left and right walls and the upper wall are formed with respect to the front and rear walls. The connection part can be formed by forming a closed space only by casting the body. The bellmouth block can be made much smaller than a connection part such as a handhole, so that it can be manufactured in advance in a factory or the like and transported to the site. Also, the placing of the left and right walls and the upper wall may be performed when the placement of the underground pipe unit is completed along the arrangement route, and the work order can be changed. The connection between the underground pipes can be completed only by fitting the male joint and the female joint.

[0006] By forming the underground pipe with a flat inner surface and having flexibility, the underground pipe can absorb vibrations caused by uneven settlement or earthquake. In addition, when the electric wire is drawn into the underground pipe, for example, when there is unevenness on the inner surface of the underground pipe, not only can not be smoothly drawn, but also the accumulation of dust and the like in the recess is prevented. Not only can
Garbage in the underground pipe can be easily blown out of the pipe by air.

[0007] A female joint is provided at the end opposite to the bell mouth portion of the cylindrical body, and a male joint of an underground pipe is fitted to the female joint so that both can be connected. With this configuration, not only the underground pipes but also the bellmouth block and the underground pipes can be connected to each other only by fitting together without using a tool.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, six underground pipes 1 for accommodating electric wires (in a state where three pipes are horizontally arranged in three rows vertically) are used as supporting members. The underground pipe unit U is constituted by being penetrated and supported by four spacers 2 made of urethane. The underground pipe unit U is prepared in advance in a factory or the like, and then transported to the site for use. Specifically, the underground pipe 1 has a diameter of 90 mm, a length of about 5 m, and a weight of about 10 kg. The connection between the buried pipes 1 and 1 requires a force of about 15 kg. And
Push the other underground pipe 1 into one underground pipe 1,
By pushing in the necessary number, here six times, of the necessary number, the connection work of the underground pipe units U, U located before and after the installation route is completed.

As shown in FIGS. 3 and 4, a male joint 3 is screwed into one end in the longitudinal direction of the underground pipe 1 and fixed to the male joint 3 at the other end. A possible female joint 4 is screwed in and fixed. The number and material of the spacers 2 are not limited to those described above. The distal end of the male joint 3 has a tapered portion 3A having an outer diameter smaller than the inner diameter of the female joint 4,
The ring member 5 provided in the female joint 4 is fitted with a circumferential groove 3B for fixing the joints 3 and 4 in the fitted state. In the female joint 4, in addition to the ring member 5, a seal member 6 for slidably contacting the outer surface of the female joint 4 and performing a sealing function is provided. Incidentally, reference numeral 7 shown in FIG. 4 denotes an O-ring for sealing between the joints 3 and 4 and the underground pipe 1. The joints 3 and 4 may be made of any material such as metal, ceramic, and hard rubber, in addition to being made of synthetic resin.

As shown in FIG. 5, the underground pipe 1 is a flexible synthetic resin corrugated hose 1A.
The core 1B made of the same material made of synthetic resin is located in the recessed part, so that the mechanical strength of the underground pipe 1 can be improved while absorbing the vibrations caused by uneven settlement or earthquake. And the inner surface is flat.

A large number of the underground pipe units U are installed while being connected along an installation route.
A connecting portion 8 such as a handhole or a manhole is installed at each predetermined location, and a part of the connecting portion 8, that is, a bell mouth block 9 constituting the front and rear walls, is connected to the connecting portion 8 in FIG.
(A) and (b) are shown. The bell mouth block 9 has a bell mouth portion 10 at one end, the inner surface of the tip of which is curved so as to expand outward toward the tip portion, and a female connection portion at the other end to which the male joint 3 can be fitted. (Shown in FIG. 7) and six bell-mouth portions 10 of these cylinders 12 are horizontally arranged in three rows vertically in two stages. And a concrete body 13 for conversion into a concrete body. 1 shown in FIGS. 6A and 7
Numeral 4 denotes protrusions formed at two places in the upper and lower portions. An annular auxiliary protrusion 15 having a smaller degree of protrusion is integrally formed before and after the protrusions 14, 14. The position of the concrete body 13 in the longitudinal direction is prevented from being displaced by the tensioning action of the auxiliary protrusions 14 and the auxiliary protrusions 15 and 15. The connection part 11
Inside, a ring member 5 and a seal member 6 are provided similarly to the joint 4 described above.

The operation of arranging the underground pipe unit U will be described. First, six underground pipes 1 are placed in a groove 16 formed along the route of the underground pipe unit U. While arranging the underground pipe unit U equipped sequentially,
The underground pipe units U, U located before and after in the arrangement direction are fitted to each other and connected to each other as described above. Then, as shown in FIG. 1, two specific underground pipe units U,
A pair of the bell mouth blocks 9 are arranged between the U in such a manner that the bell mouth portions 10 face inward, and the male connection of the underground pipe unit U is connected to the female connection portion 11 of the bell mouth block 9. The fittings 3 of the mold are fitted to connect the two. In this state, concrete is cast on one side between the bell mouth blocks 9 and 9 to form the wall 17.
And a hand cover 19 is formed by placing a concrete lid 18 above the bellmouth blocks 9 and 9. 20 shown in the figure is the other concrete wall. 19 shown in FIG.
If it is a bottom plate and the bottom surface is concrete-finished, the bottom plate 19 may be omitted and the bellmouth block 9 may be directly installed on the bottom surface. After the connecting portion 8 is configured in this way, the inside of the groove 16 other than the connecting portion 8 hand hole 19 is filled with sand 21 for functioning as an internal fireproof material and a shock-absorbing material for vibrations such as earthquakes. A plate 22 made of concrete for forming a sidewalk is placed on the sand. In order to make the upper surface of the plate-shaped body 22 and the upper surface of the lid 18 of the connecting portion 8 flush with each other, concrete is cast on the upper surfaces of the bell mouth blocks 9, 9 to support the mounting table 24 for supporting the lid 18. , 24 are formed.

In the above embodiment, the bell mouth block 9 to which the six underground pipes 1 can be connected is buried along the installation route. However, as shown in FIG. Four bell mouth blocks 9 to which the middle buried pipes 1 can be connected may be vertically stacked to connect a total of 24 underground buried pipes 1 or shown in FIG. As described above, two bell mouth blocks 9 to which six underground pipes 1 can be connected are vertically stacked, and nine underground pipes are provided at the upper end of the bell mouth block 9 arranged above the bell mouth blocks 9. Two bellmouth blocks 9 to which the underground pipes 1 can be connected may be arranged in a horizontal direction so that a total of 30 underground pipes 1 can be connected, and the underground pipes 1 can be connected. The number may be set other than these. The bell mouth block 9 can be connected to six underground pipes 1, or can be connected to two, four, or eight underground pipes 1. The number of underground pipes 1 connectable to the bell mouth block 9 may be any number. The bell mouth blocks 9, 9 stacked in the vertical direction can be made stronger by applying a mortar or the like to the surfaces that come into contact with each other and integrating them.

In the above-described embodiment, the case where the wall 20 is formed on one side of the installation route is shown. However, the underground pipe unit U is installed along the installation route without the wall 20. It can also be arranged. In this case, it is necessary to form a wall on both lateral sides of the bell mouth blocks 9 and 9.

[0015]

According to the first aspect, since the front and rear walls of the connecting portion such as the handhole or the manhole can be constituted by the pair of bell mouth blocks, the connecting portion such as the handhole or the manhole is separately formed. Compared to things
It is possible to provide a method of constructing an underground pipe capable of easily and quickly forming a connection portion and shortening the time required for disposing the underground pipe. Moreover, if a bell mouth block is installed, the connecting portion may be configured at any time, and there is an advantage that the construction work can be rationally advanced.

According to the second aspect, the underground pipe can be prevented from being damaged by arranging the underground pipe itself so as to be able to absorb vibration.
There is no need to perform repair work over a long period of time.
Also, by making the inner surface of the underground pipe flat,
Not only can the wire be smoothly drawn in, but also the dust can be blown off to the outside without stagnation inside.

According to the third aspect, the connection between the bell mouth block and the underground pipe can be easily and quickly performed only by fitting without using a tool or the like. Time can be reduced.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional side view of an underground pipe after completion of construction.

FIG. 2 is a perspective view showing the periphery of a connection unit.

FIG. 3 is a side view of an underground pipe unit.

FIG. 4 is a side view in partial section showing a connection state of the underground pipes.

FIG. 5 is a partially cutaway side view of an underground pipe.

FIG. 6 (a) is a longitudinal side view of a bell mouth block,
(B) Rear view of the bellmouth block.

FIG. 7 is a side view showing the shape of the cylindrical body of the bell mouth block.

FIG. 8 is a longitudinal sectional front view showing another embodiment in which a bellmouth block is arranged so that 30 underground pipes can be connected.

FIG. 9 is a longitudinal sectional front view showing another embodiment in which a bellmouth block is arranged so that 24 underground pipes can be connected.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Underground pipe 1A Hose 1B Core material 2 Spacer (supporting member) 3 Male type joint 3A Tapered part 3B Peripheral groove 4 Female type joint 5 Ring member 6 Seal member 7 O ring 8 Connection part 9 Bell mouth block 10 Bell Mouse section 11 Connection section 12 Cylindrical body 13 Concrete body 14 Projection section 15 Auxiliary projection section 16 Groove 17 Wall body 18 Lid 19 Bottom plate 20 Wall body 21 Sand 22 Plate body 24 Placement table 25 Wall U Underground pipe unit

Claims (3)

[Claims] An underground pipe for arranging a plurality of cables having a male joint at one end and a female joint connectable to the male joint at the other end. Are integrated by a support member in advance, and the integrated underground pipe units are arranged along the installation path, and a specific two underground pipe units of the arranged underground pipe unit group are connected to each other. To
A pair of bell mouth blocks each including a cylinder having a bell mouth portion at one end and a concrete block covering the cylinder are arranged with the bell mouth portions facing inward, and are adjacent to each other in the front-rear direction. Underground pipes are connected to each other by fitting with the two joints, and each bell mouth block is connected to the corresponding joint of the underground pipe unit,
By providing a wall around the bellmouth block,
A method for constructing an underground pipe, wherein a connection portion such as a handhole or a manhole is formed. 2. The underground pipe installation method according to claim 1, wherein the underground pipe has a flat inner surface and flexibility. 3. A female joint is provided at the end of the cylindrical body opposite to the bell mouth portion, and a male joint of an underground pipe is fitted to the female joint to join them together. The underground pipe construction method according to claim 1, wherein the underground pipe is constructed so as to be configured.