JP2001152797A - Method for assembling underground buried pipeline using metallic or plastic segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of water leakage due to the deformation of a metallic or plastic segment in a method for assembling a sewage pipeline, a water stream pipe such as an underground river pipeline, a shield tunnel for cable, and various underground buried pipeline using the metallic segment made of steel or the plastic segment made of FRP. SOLUTION: A plurality of metallic or plastic segments B formed into a box shape by providing a main beam 11 and a side beam 12 on upper and lower sides and both side sides of a slightly curved square skin plate 10, respectively, are mutually joined by tightening join faces 13, 13 of the main beam 11 mutually and join faces 14, 14 of the side beam 12 mutually by joint bolts 15 to assemble the underground buried pipeline A. Water inflating rubber layers are formed on the join faces of the main beam 11 and the side beam 12 in such a way that a bolt hole of the joint bolt 15 enters a region of the water inflating rubber layer to tighten the join faces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a metal segment such as steel, a plastic segment such as FRP, and various underground pipes such as sewage pipes, underground river pipes, etc., cable tunnels, and the like. The present invention relates to a method of assembling and constructing a buried conduit, and more particularly to a method of assembling an underground conduit using a metal or plastic segment, which prevents the occurrence of water leakage due to deformation of the metal or plastic segment.

[0002]

2. Description of the Related Art In the construction of various underground pipelines such as sewage pipelines, underground river pipelines and other water flow pipes, cable shield tunnels, and the like, the segment 1 shown in FIG. .

The segment 1 is a metal segment such as steel or a plastic segment such as FRP. The segment 1 is almost the same as the segment used in the present invention, and will be described with reference to FIGS. Main girders 11, 11 (in FIG. 4, main girders 2,
2) and side girders 12 and 12 (side girders 3 and 3 in FIG. 4) are provided to form a box shape.

As shown in FIG. 4, the segment 1 having the above-described structure has a sealing groove 5 formed on the joint surface 4 of the main girder 2 and a molded water-swelling rubber 6 is attached to the sealing groove 5 with an adhesive. After joining, the joining surfaces 4 and 4 are joined together and tightened with the joint bolt 7 to combine a plurality of pieces,
The underground pipe A shown in FIG. 1 is constructed. Although not shown, the side girders 3 are joined in the same manner as the main girders 2. With this structure, the well-known underground pipe A is prevented from infiltrating groundwater from the rear side by the molded water swelling rubber 6,6.

[0005]

However, in the known assembling method shown in FIG. 4, as shown in FIG. 5, the molded water-swelling rubber 6, 6 absorbs groundwater during or after assembling. When swelling, the segments are deformed so that the gap is opened with the molded water-swelling rubber 6 as a fulcrum,
Groundwater leaks from this gap.

Accordingly, an object of the present invention is to prevent the occurrence of water leakage due to the deformation of these segments even when assembling various underground pipes using metal segments such as steel or plastic segments such as FRP. It is an object of the present invention to provide a method of assembling an underground conduit using metal or plastic segments which has improved disadvantages in the art.

[0007]

According to the present invention, there is provided a box-shaped metal or plastic in which a main girder and a side girder are provided on upper and lower sides and both side sides of a quadrilateral skin plate. In assembling the underground pipeline by fastening a plurality of segments made of the main girder and the side girder joint surface and the side girder joint surface with joint bolts respectively, the joint surface of the main girder and the side girder is A water swelling rubber layer is formed so that a bolt hole of the joint bolt enters a region of the water swelling rubber layer, and the joint surface is tightened.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of one specific example of an underground pipe according to the present invention, FIG. 2 is a partial perspective view of one specific example of a segment used in the present invention, and FIG. FIG. 6 is a partial cross-sectional view showing a joined state of the segments according to FIG.

The underground pipeline A in FIG. 1 is constructed by joining a plurality of segments B, B. The segment B is made of metal or plastic, and as shown in FIGS. 1 and 2, the main girders 11, 11 and the side girders 1 are respectively provided on the upper and lower sides and both side sides of the quadrangular slightly curved skin plate 10.
2 and 12 are provided to form a box shape. 1 and 2, reference numeral 18 denotes an auxiliary girder for reinforcing the segment B.

Here, the metal segment is a steel segment, a composite segment (CP segment) in which cement is filled in a box-shaped hollow of the steel segment, a ductile segment mainly composed of cast iron, a MM.
The ST segment and the like, but a steel segment is generally used. The plastic segment is a segment manufactured using a polyester resin, a vinyl ester resin, a polystyrene tree, or the like as a material.

As shown in FIGS. 1 and 2, a plurality of these metal or plastic segments B are tightened by joint bolts 15 between the joint surfaces 13 of the main girder 11 and the joint surfaces 14 of the side girder 12. The underground pipeline A is assembled by joining together.

A feature of the present invention is that, as shown in FIG. 3, the joining surfaces 13 and 13 of the main girder 11 and the side girder 12 (not shown).
(In the case of the side girder 12, the joining surfaces 14, 14. In FIG. 3, the main girder 1 is shown.
Although only 1 is shown, the same applies to the side girders 12. ), The water swelling rubber layer 16 is formed so that the bolt hole 17 of the joint bolt 15 enters the area of the water swelling rubber layer 16.
I am determined to tighten my comrades.

As shown in FIG. 2, the above-mentioned water-swelling rubber layer 16 is formed in a strip shape from the end to the end along the longitudinal direction of the main girder 11 and the side girder 12 and is continuously formed so that no break is formed. The formation is preferable in order to completely prevent the occurrence of water leakage as described later.

The water-swellable rubber layer 16 has a water-swellable liquid rubber on the joint surface 13 of the main girder 11 and a joint surface 14 of the side girder 12, respectively. An automatic coating machine, a cartridge equipped with a special nozzle, a brush, or any other coating such that the bolt hole 17 is positioned substantially at the center of the water-swellable liquid rubber coating width so as to enter the rubber coating area. By means, a thickness of 0.5 to 3 mm, preferably 1 to 2.0 mm, a width of 50 to
It is formed by applying to 100 mm and drying.

As the water-swellable liquid rubber, a rubber-like elastic material kneaded with a swelling material is blended so as to react with water to have a swelling ratio of about 2 to 4 times. It is rubber. Here, as the rubber-like elastic material, chloroprene rubber, natural rubber, urethane rubber, butyl rubber and the like can be mentioned, and as the swelling material, isobutylene,
Water-absorbing anhydrous maleic acid salt, water-absorbing polyvinyl alcohol, hydrophilic polyurethane and the like can be mentioned.

When assembling the segment B according to the present invention, as shown in FIG. 1, a plurality of segments B, B,... Contact each other and both joint surfaces 1
The underwater pipeline A is constructed by superimposing the water-swelling rubber layers 16 and 16 formed on 3 and 14 and tightening them with the joint bolts 15 as shown in FIG.

At this time, the bolt hole 17 of the joint bolt 15
Is located in the region of the water-swelled rubber layer 16, the water-swelled rubber layers 16, 16 are tightened from above and below by the joint bolts 15, 15. For this reason, even if groundwater invades between the segments B and B from the back side of the underground pipe A, and the water-swelling rubber layer 16 absorbs and swells this groundwater, the swelling is suppressed by the joint bolt 15, The segments are not deformed as in the related art. In addition, the gap is completely sealed by the swelling of the water-swelled rubber layer 16 and no water leakage occurs.

[0019]

As described above, according to the present invention, when assembling an underground pipe using a plurality of metal or plastic segments, a water-swelling rubber layer is provided on the joint surface of the main girder and the side girder, and the joint bolt is provided. Is formed so as to enter the region of the water-swelled rubber layer, and these joint surfaces are tightened with the joint bolts to assemble, so that the following effects can be obtained.

(1) Water leakage due to deformation of the metal or plastic segments does not occur.

(2) There is no need to form a seal groove in the joint surface by cutting the joint surface as in the prior art.
The process can be simplified.

(3) Further, unlike the conventional case, no molded water-swellable rubber is required. Since the present invention uses a water-swelled rubber layer instead, the amount used is small, and it is very economical.

(4) In addition, the water-swellable rubber layer is more firmly adhered to the joining surface of the segments than the conventional molded water-swellable rubber, does not come off, and water stopping can be reliably expected.

[Brief description of the drawings]

FIG. 1 is a perspective view of one specific example of an underground pipeline according to the present invention.

FIG. 2 is a partial perspective view of one specific example of a segment used in the present invention.

FIG. 3 is a partial cross-sectional view illustrating a joined state of segments according to the present invention.

FIG. 4 is a partial cross-sectional view showing a joining state of conventional segments.

FIG. 5 is a partial cross-sectional view showing a defect of the conventional bonding state of FIG.

[Explanation of symbols]

 A Underground pipeline B Segment 10 Skin plate 11 Main girder 12 Side girder 13 Joint surface 14 Joint surface 15 Joint bolt 16 Water swelling rubber layer 17 Bolt hole

Claims (3)

[Claims] 1. A plurality of metal or plastic segments each having a box shape by providing main girder and side girder on the upper and lower sides and both side sides of a quadrilateral skin plate, the main girder joint surface and the side girder joint surface. When assembling the underground pipe by fastening each other with a joint bolt and joining them together, a water swelling rubber layer is formed on the joint surface of the main girder and the side girder, and the bolt hole of the joint bolt is formed with the water swelling. A method of assembling an underground pipe using a metal or plastic segment, wherein the pipe is formed so as to enter a region of a rubber layer and the joint surface is tightened. 2. The method for assembling an underground pipe according to claim 1, wherein the water-swellable rubber layer is formed in a strip shape along the longitudinal direction of the main girder and the side girder. 3. The water-swellable liquid rubber according to claim 1, wherein the water-swellable rubber layer is coated with a water-swellable liquid rubber on a joint surface between the main girder and the side girder, and a bolt hole of the joint bolt is coated with the water-swellable liquid rubber. The method for assembling an underground pipe according to claim 1, wherein the pipe is applied so as to enter an area and dried.