JPH0577321U - Underground outer wall using PCa board - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] PCa boards are fixed around the underground structure of the building structure to serve as a formwork and construction member for the underground wall, rationalizing the construction of the underground wall and building structure, and shortening the construction period. At the same time, it is intended to provide an underground outer wall using a PCa plate having improved outer wall performance and reliability. [Structure] PCa boards 2 are arranged in parallel on the inner surface side of the earth retaining wall 1 at intervals, and the upper and lower parts of the PCa boards 2 are fixed to the underground foundation 5 and the underground perimeter skeleton of the building structure with metal fittings 3 and 4. It is characterized by a structure in which it is fixed and built in, and backfilling concrete C is placed between the earth retaining wall 1 and the PCa plate 2 to be integrally constructed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an underground outer wall using a PCa plate, which has a feature of prefabricating an outer wall of an underground skeleton in a building structure.

[0002]

[Prior Art]

 Conventionally, the underground outer wall around the underground structure in a building structure is formed by excavating the inside of the earth retaining wall 11 by arranging the earth retaining wall 11 with H steel horizontal sheet pile or the like as shown in FIG. The underground foundation 12 is constructed on the bottom of the basement S, and the earth retaining wall 11 is used as the outer formwork, and the inner formwork 13 is built in parallel with the space inside the earth retaining wall 11, and the inner formwork 13 is used as the underground foundation 12 and the building structure. 20 is fixedly installed around the steel beam 20a, and the concrete is laid between the earth retaining wall 11 and the inner formwork 13 to construct an outer underground wall 15 around the underground structure, or A method of using a continuous wall (not shown) as a mountain retaining structure is also proposed and implemented.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional underground outer wall is constructed by arranging around the outer periphery of the underground room where the steel frames of the building structure etc. are arranged, constructing a frame and placing concrete, so many members, labor, This is a troublesome work, requires a long curing period, has a great influence on the progress of the construction work, and has a problem that the construction period is prolonged. In addition, the underground continuous wall requires a large-scale machine and is a large-scale construction, and there are problems that the inner surface side is fixed to the underground structure and finishing work is required.

The present invention was developed to address the above-mentioned problems, and the purpose thereof is to fix PCa plates around the underground structure of a building structure to fix the external wall of the underground structure. As a formwork / construction member, the purpose is to provide a basement exterior wall using PCa boards with improved exterior wall performance and reliability, as well as rationalizing the construction of the basement exterior wall and building structures and shortening the construction period.

[0005]

[Means for Solving the Problems]

 According to the present invention, PCa boards are arranged in parallel with each other on the inner surface side of the earth retaining wall, and the upper and lower parts of the PCa boards are fixedly attached to the underground foundation and the underground perimeter frame of the building structure to construct the earth retaining wall. The backfilling concrete is placed between the PCa boards and built integrally to rationalize the construction of the underground outer wall and the building structure, and improve the performance and reliability of the outer wall.

[0006]

[Action]

 PCa boards are arranged parallel to each other on the inner surface side of the earth retaining wall, and the upper and lower parts of the PCa boards are fixedly attached to the underground foundation and the outer perimeter frame of the building structure, and the space between the earth retaining wall and the PCa board is fixed. It is easy and quick to construct as a synthetic outer wall that is constructed by joining backfilled concrete into one body and joining it integrally, eliminating the need for formwork, inner wall finishing of the outer wall, curing period, etc., simplifying the steel reinforcement work, The internal construction work will continue and labor will be saved significantly, shortening the construction period. In addition, the composite outer wall receives out-of-plane forces such as earth pressure and water pressure with strong proof strength and rigidity, and transmits it to the underground foundation. The concrete of the PCa plate is dense and evenly cured and formed, so the surface It does not require finishing, and the desired strength is secured by adjusting the bar arrangement of the backfill concrete part, resulting in excellent outer wall performance and reliability.

[0007]

【Example】

 FIG. 1 shows an embodiment of the present invention, in which 1 is an earth retaining wall, 2 is a PCa plate, 3 and 4 are fixing metal fittings on the upper and lower parts of the PCa plate 2, and 5 is a bottom of a basement S. Underground foundation, 6 are steel beams arranged around the underground structure of the building structure built in the basement S, 7 is laying mortar, C is backfill concrete, and it is on the inner surface side of the retaining wall 1. PCa boards 2 are arranged in parallel at intervals, and the upper and lower parts of the PCa boards 2 are fixed to the underground foundation 5 and the underground perimeter frame (steel beam) 6 of the building structure with the fixing metal fittings 3 and 4 and built. A backfilling concrete C is placed between the earth retaining wall 1 and the PCa plate 2 to form an underground outer wall using the PCa plate integrally constructed.

More specifically, the earth retaining wall 1 is a mountain retaining wall made of H steel horizontal sheet pile, SMW, sheet pile and the like, and the inside of the earth retaining wall is excavated to form a basement S, and a basement S It is self-supporting with a continuous foundation (cloth foundation) 5 constructed on the bottom. The PCa plate 2 is made of precast reinforced concrete that is manufactured in advance in factories, etc. It is reinforced by reinforcing bars and a concave or convex shear cotter (not shown) is formed on the back side to form a backfill concrete C. , A semi-PCa plate such as a PCa plate or an Omnia plate finished on the surface side by an appropriate means, and further, a fixing metal fitting including a bolt 3a, an angle member 3b, etc. on the lower part thereof. 3 and angle members 4a, 4b, etc., the structure for arranging the fixing metal fittings 4 is provided. After the backfilling concrete C placing portion is laid inside the earth retaining wall 1, the PCa The plate 2 is arranged at a desired distance inside the earth retaining wall 1, and the lower part of the plate 2 is fixed to the underground foundation 5 of the building structure and the periphery (for example, a steel beam) 6 of the building structure with the metal fittings 3 and 4. Secured as shown The mortar 7 is filled between the lower part of the PCa board 2 and the surrounding of the underground foundation 5, and the backfill concrete C is placed between the earth retaining wall 1 and the PCa board 2 so that the backfill concrete is integrated. Constructed as a bonded composite outer wall. In the figure, 10 is a cast-in-place slab.

When constructing the above-mentioned underground outer wall, the PCa board 2 and the earth retaining wall 1 are also used as the inner and outer formwork, and by simply placing the backfill concrete C between them, the underground outer wall can be easily and quickly constructed. In addition, the PCa plate placed inside the outer wall of the basement eliminates the need to remove the formwork, finish the inner surface of the outer wall, and the curing period. This simplifies the reinforcing bar work and continues the internal construction work. , The material will be greatly saved, labor will be saved, and the construction period will be shortened.

The composite outer wall has a construction in which the earth retaining wall 1, the backfill concrete C, and the PCa plate 2 are joined together as one body, and the out-of-plane force such as earth pressure and water pressure applied to the underground outer wall is strongly proof, It is received rigidly and transmitted to the bottom of the underground foundation 5, and the concrete of the PCa plate 2 is dense and evenly cured and formed, so it is waterproof and easy to prevent dew condensation, and the bar arrangement of the backfill concrete C part is adjusted. This has features such as the desired strength being secured, and the outer wall performance and reliability are greatly improved.

[0011]

EFFECTS OF THE INVENTION The present invention is configured as described above, and PCa boards are arranged in parallel on the inner surface side of the earth retaining wall with a space between them, and the upper and lower portions of the PCa boards are underground in the building structure. It can be easily and quickly constructed as a composite outer wall that is integrally bonded by building it by fixing it to the foundation and the exterior of the basement and building it, and placing the backfilling concrete between the earth retaining wall and the PCa plate. No internal finishing or curing period is required, and the reinforcing bar work is simplified and the internal construction work is continued, resulting in significant labor savings and a shorter construction period. In addition, the composite outer wall receives out-of-plane forces such as earth pressure and water pressure with strong proof strength and rigidity, and transmits it to the underground foundation. The PCa plate enhances waterproofness and makes it easy to prevent dew condensation and backfill concrete. Outer wall performance and reliability are improved along with the rationalization of construction of building structures, such as the desired strength being secured by adjusting the bar arrangement of parts.

[Brief description of drawings]

FIG. 1 is a vertical sectional view (A) showing an embodiment of the present invention and enlarged vertical sectional views (B) and (C) of the upper and lower parts.

2A and 2B are a longitudinal sectional view (A) and a plan view (B) showing a conventional example.

[Explanation of symbols]

 1 Earth retaining wall 2 PCa board 3, 4 Fixing metal fittings 5 Underground foundation C Backfill concrete

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[Procedure amendment]

[Submission date] March 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

FIG. 2 is a longitudinal sectional view showing a conventional example.

Claims (1)

[Scope of utility model registration request] 1. PCa boards are arranged in parallel on the inner surface side of the earth retaining wall with a space therebetween, and the upper and lower parts of the PCa boards are fixedly attached to an underground foundation and an underground peripheral frame of a building structure, An underground outer wall using a PCa plate, which is constructed by placing backfilling concrete between the retaining wall and the PCa plate.