JPS62137324A - Foundation structure for high building - Google Patents

Abstract

PURPOSE:To cope with shearing force and falling moment of foundation by a method in which an underground continuous wall is formed on the surrounding ground of a building, many bottom-expanded piles are formed on the ground surrounded by the underground continuous wall, and the underground continuous wall and the heads of the piles are connected with latticed foundation beams. CONSTITUTION:A trench is excavated in the surrounding ground of a building, a reinforcing bar cage is inserted into the trench, and concrete is placed to form an underground continuous wall 1. Vertical pits are drilled in the ground surrounded by the wall 1, the bottoms of the pits are expanded, reinforcing bar cages are inserted into the pits, and concrete is placed into the pits to form many bottom-expanded piles 2. The wall 1 and the heads of the piles 2 are connected with latticed reinforced concrete foundation beams 3, and reinforced concrete columns 4 and beams 5 are formed on the beam 3. The sufficient sitting depth and rigidity of the building can thus be secured to cope with shearing force and falling moment acting on the foundation from above.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the foundation structure of a high-rise building in a high-rise apartment complex or the like that does not have a basement or has a shallow basement.

[Prior Art and Problems to be Solved by the Invention] Conventionally, in urban areas, it is known to rely on underground continuous walls to provide support for buildings, and to construct expanded-bottom piles by on-site construction.

By the way, there are currently many requests for the construction of super high-rise apartment buildings for the purpose of effective land use and improvement of the housing environment. By the way, such buildings have less depth of penetration than those that do not require a basement, and the ground may be soft, making it an issue to develop a foundation structure that accommodates this.

This invention applies the above-mentioned underground continuous wall and bottom-expanding pile to solve this problem.

[Means for solving problems]

The structure of this invention is as described in the claims column, and consists of constructing underground continuous wall piles in the surrounding ground of a building by the reverse method, and creating a large number of expanded bottom piles in the ground surrounded by the underground continuous wall pile by the reverse method. The foundation structure of the high-rise building was created by connecting the pile heads with foundation beams in a grid pattern.

〔Example〕

In the figure, a trench is excavated in the ground around the building using the reverse method, reinforcing bars are inserted into the trench, concrete is poured, and underground continuous wall piles 1 are created.

The bottom of the underground continuous wall pile l will also be expanded if necessary.

Further, in the ground surrounded by the underground continuous wall pile 1, a hole is drilled using the reverse method, the bottom is expanded, a reinforcing bar cage is inserted, and concrete is poured to create the expanded bottom pile 2.

Although the design is appropriate depending on the scale of the upper building, for example, the thickness of the underground continuous wall is about IB, and the diameter of the expanded pile 2 is 1.8.
mm, and the expanded diameter is approximately 2.6 mm. Also, its lower end reaches the supporting ground.

The heads of the underground continuous wall piles 1 and the bottom expansion piles 2 have a reinforced concrete structure and are connected by foundation beams 3 so as to form a lattice shape.

A 4° column beam 5 of reinforced concrete structure is constructed on the foundation beam 3.

〔Effect of the invention〕

This invention consists of the above-mentioned structure, and it is possible to ensure a sufficient depth of penetration of the building with underground continuous wall piles, and to provide sufficient rigidity by connecting each pile with a foundation beam. can. Therefore, it is possible to design a structure that can sufficiently withstand the shearing force and overturning moment acting on the foundation from the upper building.

[Brief explanation of drawings]

Half of Figure 1 shows the pile plan, the other half shows the foundation plan, and Figure 2 shows the elevation. ■...Underground continuous wall pile, 2...Expanded bottom pile, 3...Foundation beam. Figure 1 Figure 2

Claims (1)

[Claims] Constructing underground continuous wall piles in the ground surrounding the building, constructing a large number of expanded bottom piles in the ground surrounded by the underground continuous wall piles, and connecting the heads of each pile with foundation beams in a grid pattern. The basic structure of a high-rise building is characterized by: