JPH0596141U - Joint structure of underground structure - Google Patents

Abstract

(57) [Summary] [Purpose] When tightening and fixing the joining flange for joining units, prevent the sealing material interposed between both joining flanges from being excessively tightened. [Structure] Both joint flanges 11 that can be fastened to each other
On either one of the facing surfaces of A and 11B, a convex portion 19 that limits the tightening margin for the sealing material 18 is formed.

Description

[Detailed description of the device]

This invention is an underground structure for constructing a basement room or the like of a desired size by bringing in a plurality of units manufactured in a factory to a site, and joining and fixing adjacent units at the site. The present invention relates to a joint structure of objects.

[0002]

[Prior Art]

 Generally, in this type of underground structure, as shown in FIG. 8, a U-shaped steel panel 103 (103A, 103B) that has a heat insulating material 101 etc. and constitutes the wall material of the unit 102 (102A, 102B). By fixing the joining flanges 104 (104A, 104B) of and the fastening flanges 104A, 104B with bolts 105 and nuts 106, the units 102A, 102B are joined together. In that case, a seal material 107 made of rubber or the like is interposed between the joining flanges 104A and 104B in order to ensure watertightness of the joining portion.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, since the sealing material 107 between the joining flanges 104A and 104B can be tightened without any limitation, it is likely to be in an excessively tightened state, and if such excessive tightening occurs. However, the sealing material 107 may be deformed or damaged unnecessarily, and the sealing performance may not be sufficiently exhibited.

The present invention has been made in order to solve the above-mentioned problems, and provides a joint structure for an underground structure capable of preventing over-tightening of a sealing material and ensuring proper and sufficient sealing performance. It is intended to be provided.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the joint structure for an underground structure according to the present invention has a convex portion that restricts a tightening margin for a sealing material on one of the facing surfaces of both joint flanges that are tightened together. It was done.

[0006]

[Action]

 According to this invention, when tightening / fixing the joining flange, the convex portion hits the mating joining flange, and the tightening margin for the sealing material is limited. It is possible to prevent the deterioration of the sealing performance.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of an underground structure to which the joint structure for an underground structure according to the present invention is applied.

In FIG. 1, reference numeral 1 (1A, 1B, ..., 1N) denotes a plurality of underground structures that are unitized and installed underground, and these units 1 are joint structures to be described later for adjacent units. Are joined and connected by. As shown in FIGS. 2 and 3, the wall material 3 constituting the ceiling, floor, etc. in each unit 1 is a steel made by filling urethane foam 6 as an insulating material between an inner steel plate 4 and an outer steel plate 5. It is made of panels. Reference numeral 7 is a steel beam member provided on the steel panel 3. An inner lining material 9 and the like are attached to the inner surface of the steel panel 3 with a wood base 8 interposed therebetween.

As shown in FIG. 4 and FIG. 5, the outer steel plate 5 of the steel panel 3 is formed with continuous extending portions 10 (10A, 10B) facing the adjacent unit 1 side. As shown in FIG. 4, a U-shaped flange 11 (11A, 11B) for joining to the adjacent unit 1 is fixed to the tip of each extending portion 10 by welding 12 or the like. Reference numeral 13 is a guide plate that is fixed to the outer surface of the extension portion 10 by welding 14 or the like and that aligns the extension portion 10 on the adjacent side when joining.

As shown in FIG. 4, a bolt insertion hole 15 (15A, 15B) is formed in the joining flanges 11A and 11B, and the bolt 16 and the nut 17 inserted into the bolt insertion hole 14 are formed. Thus, the joining flanges 11A and 11B are tightened. A water-expandable sealing material 18 penetrating the bolt 16 is interposed between the joining flanges 11A and 11B. Numeral 19 is one of the facing surfaces of the joining flanges 11A and 11B, for example, a convex portion formed of a flat bar protruding on the joining flange 11B side. The convex portion 19 is the thickness of the sealing material. The thickness t (2 mm) is smaller than T (5 mm) and limits the tightening margin of the sealing material 18.

As shown in FIG. 7, an inner steel plate lid 20 is laid between the adjacent units 1 so as to face the extending portions 10 A and 10 B of the outer steel plate 5 and, for example, by plug welding 21. It is fixed to the joining flanges 11A, 11B and the like. Reference numeral 22 is a foamed urethane that is filled in the above-mentioned joint portion at the site, and 23 is a urethane injection hole formed in the inner steel plate lid 20.

Next, a method for joining the above units will be described. In the state of FIG. 5, the joining flange 11A on the unit 1A side is joined to the joining flange 11B of the adjacent unit 1B as shown in FIG. At this time, by aligning the outer steel plate 10A on the unit 1A side with the guide plate 13 on the unit 1B side, it is possible to accurately and easily align the both flanges 11A and 11B.

In this state, the joining flanges 11A and 11B are tightened via the bolts 16 and the nuts 17, whereby the units 1A and 1B are joined and fixed. Since the connecting flanges 11A and 11B are provided on the extending portions 10A and 10B of the outer steel plate 5 of the units 1A and 1B, the tightening work can be performed in the space between the units 1A and 1B, so that workability is improved. Be improved. Moreover, since the joining flanges 11A and 11B are directly fixed without using a connecting member, the increase in the number of steps can be suppressed.

By tightening the joint flanges 11 A and 11 B with the bolt 16 and the nut 17, the joint portion is sealed with the water expansion seal material 18. Here, if the bolt 16 and the nut 17 are excessively tightened, the sealing function of the sealing material 18 may be deteriorated. However, since the convex portion 19 is provided on the joining flange 11B, the tightening margin is limited by contacting the convex portion 19 with the other joining flange 11A, and the tightened state of the sealing material 18 is properly adjusted. Can be set to. As a result, the sealing performance of the sealing material 18 is effectively exhibited.

After tightening and fixing the above-mentioned joining flanges 11A and 11B, an inner steel plate lid 20 is laid between the unit 1A side and the unit 1B side, and the joining flanges 11A and 11B are joined by plug welding 21. Etc. Finally, the joint 22 is heat-insulated by injecting urethane 22 from the urethane injection hole 23 of the inner steel plate lid 20 and foaming it.

[0016]

[Effect of the device]

 As described above, according to the present invention, the convex portion that limits the tightening margin for the sealing material is formed on either one of the facing surfaces of the joint flanges that are tightened together, so that the sealing material is not overtightened. It is possible to ensure that the proper tightening condition is obtained. Therefore, it is possible to ensure proper and sufficient sealing performance at the joint.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of an underground structure to which a joint structure for an underground structure according to an embodiment of the present invention is applied.

FIG. 2 is a plan view showing the configuration of the wall material of the unit.

FIG. 3 is a cross-sectional view showing the structure of the wall material of the unit.

FIG. 4 is an enlarged cross-sectional view of a main part showing a joint structure of units.

FIG. 5 is a cross-sectional view showing a state before joining the units.

FIG. 6 is a cross-sectional view showing a joined state of a joining flange of each unit.

FIG. 7 is a cross-sectional view showing a completed joining state of the units.

FIG. 8 is an explanatory diagram of a conventional joint structure for an underground structure.

[Explanation of symbols]

 1A, 1B, 1C Unit 3 Steel panel 11A, 11B Joint flange 16 Bolt 17 Nut 18 Sealing material 19 Convex part

Claims (1)

[Scope of utility model registration request] 1. A wall member of a unit that is divided into a plurality of parts to form an underground structure is made of a steel panel, and a joining flange provided on the steel panel and a joining flange on an adjacent unit side are provided, In the joint structure of the underground structure where the units are joined together by tightening the bolts and nuts with the sealing material sandwiched between them, either one of the facing surfaces of both joining flanges that are fastened together A joint structure for an underground structure, characterized in that a convex portion that limits a tightening margin for the sealing material is formed on the.