JPH04222719A - Underground structure - Google Patents

Abstract

PURPOSE:To prevent the floating of underground structure by groundwater even in places where groundwater springs out violently by a method in which reaction rib parts are projectionally provided to the outer wall of an underground structure. CONSTITUTION:A required number of steel floor panels, steel wall panels 3, steel roof panels are set on the bottom, wall, and roof of a pit formed in the ground 1 and fixed by bolts to form an underground structure 5. Reaction rib parts 8 of angled or groove-type shape steel are set on the corresponding positions of structural parts 7 constituting the skeleton of the structure 5 on the outer wall 6 of the structure 5 and fixed by welding. The reaction rib parts can thus be projectionally and integrally formed on the structural parts 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to basements and other underground structures.

0002

[Prior Art] Conventionally, when constructing an underground structure,
For example, as shown in Fig. 5, a desired number of steel floor panels B, steel wall panels C, and steel roof panels D are built into the bottom, walls, and roof of a hole formed in the ground A, and the desired number of steel floor panels B, steel wall panels C, and steel roof panels D are installed underground. An underground structure is constructed by forming a structure body E and applying interior finishing to the inside of the underground structure body E.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, especially when an underground structure is constructed in a place where groundwater seeps out heavily, there is a risk that the underground structure will float to the surface due to the buoyancy of the groundwater.

The present invention has been made in order to solve the above-mentioned conventional problems, and aims to provide an underground structure that is free from the risk of floating due to the buoyancy of groundwater even in places where groundwater seepage is severe. This is an issue to be addressed.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a reaction rib body, which is connected and integrated with the structural members constituting the skeleton of the underground structure body, on the outer wall of the underground structure body. It is characterized by being formed with a protrusion.

[0006]

[Example] Figures 1 and 2 show one of the underground structures of the present invention.
An example is shown in which a desired number of steel floor panels 2 and steel wall panels 3 are placed on the bottom, wall and roof of a hole formed in the ground 1.
And on the outer wall 6 of the underground structure body 5 formed by erecting and bolting the steel roof panels 4, structural members such as columns, studs, and panel frame materials that constitute the skeleton of the underground structure body 5 are displayed. The reaction force can be mechanically connected and integrated with the structural member 7 by abutting a reaction rib body 8 made of a shaped steel piece such as an angle-shaped steel piece or a groove-shaped steel piece at a position corresponding to 7 and fixing it by welding. This figure shows an underground structure characterized by having rib bodies 8 formed in a protruding manner.

FIG. 3 shows that on the outer wall 6 of the underground structure main body 5,
An embodiment is shown in which a reaction force rib body 8 made of an I-shaped groove-shaped steel piece is formed in a protruding manner.

FIG. 4 shows that on the outer wall 6 of the underground structure main body 5,
An embodiment is shown in which a reaction rib body 8 made of a U-shaped channel steel piece is formed in a protruding manner.

The reaction rib body 8 in the present invention refers to a rib body (a rib body) protruding from the outer wall 6 of the underground structure main body 5 in order to prevent the underground structure from floating due to the buoyancy of groundwater.
The protruding degree, size, number, etc. of the reaction force ribs 8 may be arbitrarily selected and determined depending on the degree of seepage of groundwater.

[0010] The reason why the reaction rib body 8 is connected and integrated with the structural member 7 constituting the skeleton of the underground structure body 5 is as follows.
This is to ensure that the levitation preventing action (reaction force action) of the reaction force rib body 8 is transmitted to the entire underground structure to reliably prevent the underground structure from surfacing.

[0011] Also, the steel floor panel 2 and the steel wall panel 3
As the steel roof panel 4, for example, a steel panel formed by welding and fixing a steel plate to the surface of a panel frame made of shaped steel such as channel steel or angle steel may be used.

Further, the underground structure main body 5 formed in the embodiment of the present invention has flooring materials, wall materials,
The interior is finished with interior materials such as ceiling materials, and if necessary, backfill concrete and base concrete are cast on the outer peripheral surface of the underground structure main body 5 to construct the underground structure.

[0013]

[Effects of the Invention] As explained above, the underground structure of the present invention has a reaction rib body protrudingly formed on the outer wall of the underground structure body to be connected and integrated with the structural members constituting the skeleton of the underground structure body. Therefore, the levitation of the underground structure can be reliably prevented by the reaction force rib body that is connected and integrated with the structural members of the underground structure body, and therefore, even in places where groundwater seepage is severe, the buoyancy of groundwater can be used. There is no risk of underground structures surfacing.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of an underground structure of the present invention.

FIG. 2 is a front view of the same embodiment.

FIG. 3 is an enlarged longitudinal cross-sectional view of a main part of an embodiment showing a protruding state of a reaction rib body in an underground structure of the present invention.

FIG. 4 is an enlarged vertical cross-sectional view of a main part of a different embodiment showing a state in which the reaction rib body protrudes from the above.

FIG. 5 is a schematic vertical cross-sectional view of a conventional example.

[Explanation of symbols]

1 Ground 2　Steel floor panel 3 Steel wall panels 4 Steel roof panels 5 Underground structure itself 6 External wall part 7 Structural members 8 Reaction rib body

Claims (1)

[Claims] 1. An underground structure characterized in that a reaction rib body is formed protruding from an outer wall of the underground structure body to be connected and integrated with a structural member constituting the skeleton of the underground structure body.