Pile beam vertical anchor support system used for supporting foundation pit and construction method of pile beam vertical anchor support system

Abstract

The invention discloses a pile beam vertical anchor support system used for supporting a foundation pit and a construction method of the pile beam vertical anchor support system. The support structure comprises slope shield piles, pile top crown beams and anchor rods, wherein a row of slope shield piles are arranged on the edge of the foundation pit; the bottoms of the slope shield piles stretch into a soil layer under a substrate; the anchor rods comprise vertical prestress anchor rods which are formed into a row at standing ground of the outer sides of the slope shield piles, are inserted from the ground at the outer sides of the slope shield piles and are anchored in the standing ground at the outer sides of the slope shield piles; the pile top crown beams are lattice girders; one sides, close to the foundation pit, of the lattice girders are in rigid connection with the tops of the slope shield piles; one sides, far away from the foundation pit, of the lattice girders are in soft connection with the upper parts of the vertical prestress anchor rods. The support system and the construction method thereof are particularly suitable for a foundation pit which is limited in underground space and is adjacent to existing buildings, have obvious advantages in the support for the foundation pit adjacent to the existing buildings, not only are good in support effect, but also have the advantages that the construction is convenient, the working procedure is simple and the cost is lower.

Description

technical field [0001] The invention relates to a building foundation pit support system and a construction method thereof. Background technique [0002] In the design and construction of building foundation pit support, there are common support types such as (composite) soil nail support, pile (wall) anchor support, pile (wall) support support, and two or more support types. At present, the foundation pit support of most engineering projects adopts the above support type. [0003] In recent years, with the acceleration of urban construction, the number of buildings in the urban area has increased sharply, and the building density has become higher and higher. Many buildings are being built next to and very close to existing buildings, so making full use of the land At the same time, many problems have been raised: [0004] (1) Since the newly-started building foundation pit is close to the existing building, it is difficult to choose the slope support method for the new ...

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Problems solved by technology

[0008] The object of the present invention is to provide a pile-beam vertical anchor support system and its construction method for foundation pit support, which are easy to operate, simple in process, low in cost, and have good support effect. The support system in the foundation pit of the existing building with limited space is poor in support effect, cumbersome in construction, complicated in process and high in cost.

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