JPS6142215A - Box-shaped covered conduit for setting cable under ground - 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 <Industrial Application Field> The present invention relates to a concrete box-shaped culvert for laying power transmission cables, optical fibers, etc. underground.

<Problems to be solved by this invention> The inventor developed a concrete box-shaped structure consisting of a culvert main body with an open top and a lid body, instead of an electric light tube, for constructing underground pipelines for cables, optical fibers, etc. Although underdrains have been proposed in patents for simultaneous precipitation, there are issues that need to be resolved regarding the connection method and reinforcement of the pipes. The present invention solves this problem.

<Objective of the Invention> The present invention aims to strengthen the joints and pipe lines between the main body of the underdrain and the cover body which are arranged in parallel in an easy-to-implement manner.

<Structure of the Invention> A main body of a concrete box-shaped culvert with a U-shape in side view and formed with an open top surface and both sides in the connection direction, for constructing underground pipelines for power transmission cables, etc. It consists of a concrete lid that is placed on the main body, and the main body and the lid are made of parallel butted end faces in the connection direction, and a plurality of PC steel members that are tension-inserted into the wall orthogonal to the butted end faces. The pipes are connected together to form a conduit.

<Example> The main body of a box-shaped culvert made of concrete is the bottom section 2 and the side section 3a.
, 3b, the upper surface and both sides in the connecting direction are open, and the main body 1a is formed by embedding nine seams 24 having a total length in the connecting direction on both sides of the bottom plate part 2 and the upper part of the side plate parts 3a and 3b, respectively.
The main body 1b is formed of two types, the sheath 4 is interrupted and the connecting groove 5 is provided on the outer or inner surface, and the main body 1b is formed between 18 rows of main bodies on the excavated ground as shown in FIG. The ICPC+stranded wires 6 are inserted into the sheath 4 between the respective connection grooves 5, and the ICPC+stranded wires 6 are inserted into the sheath 4 between the respective connection grooves 5, and after being sufficiently tensioned, the wires are stopped by the fasteners 7 and connected. 7a is a wedge ring.

The concrete lid body has interlocking connecting parts 9 and 10 with horizontal contact surfaces in two stages, upper and lower, on both sides in the connecting direction, and is hooked onto the outer surfaces of the side plates 3a and 3b at the bottom on both sides in the non-connecting direction. A lid body 8a is formed by embedding sheaths 12a and 12b in the entire length of the connecting direction in the projections 11a and llb for preventing slippage, and a lid body 8b is provided on the outer surface of the connection groove 13f by interrupting the sheaths 12a and 12b. The PC stranded wire 6 is formed between the parallel main bodies 1a and Ib, and is mounted with the contact surfaces 9 and 10 interlocking and in contact with each other. It is inserted, tensioned sufficiently, and then fastened with the stopper 14 to connect.

14a is a wedge ring.

Note that rubber backings 15, 16, etc. are interposed between the horizontal meshing portions of the box-shaped underdrain main body and the lid body. In this way, a conduit for laying cables etc. underground can be formed. The cables, etc. 17 are arranged on an array shelf 18 installed inside the pipe before the capping.
Aligned and routed above.

<Effects of the Invention> As described above, the main body of the box-shaped underdrain and the lid body each obtain compressive stress by tension insertion of the PC steel shed, forming a pipe line that is significantly strengthened against external pressure. The connection part is also strengthened to prevent damage or displacement of the trap from causing flooding noise.

[Brief explanation of drawings]

Figure 1 is a partial perspective view showing the state of underground installation, Figure 2 is the same,
Enlarged side view, Figure 3 is the detailed color of the connection part of the PC steel material in the main body of the culvert, la and lb are the main part of the box-shaped culvert, 2 is the bottom plate part,
3a and 3b are side plate parts, 4° 12a and 12b are sheaths, 5
．． 13fl connection groove, 6iPC! Twisted wires, 7 and 14 are fasteners, 8a and 8b are lids, 9 and 10 are upper and lower interlocking contact surfaces, lla and 11b are parts, 15.16Fi rubber backing, 17 is cables, etc., 18 is arrangement shelf It is.

Claims (1)

[Claims] (1) A concrete box-shaped culvert main body formed with an open top surface and both sides in the connection direction for constructing underground conduits for power transmission and communication cables, etc., and a The main body and the lid are connected by butt-parallel end faces in the connection direction and by a plurality of PC steel members tension-inserted into the wall in the direction orthogonal to the butt end faces. A box-shaped culvert for underground installation of cables, etc., characterized in that it is configured to form a conduit.