Foundation pit piled anchor dado concrete anchor cable top beam structure and construction method thereof

Abstract

The invention relates to the field of adjacent subsurface structure foundation pits construction, particularly to a foundation pit piled anchor dado concrete anchor cable top beam structure and a construction method thereof. The foundation pit piled anchor dado concrete anchor cable top beam structure is characterized by comprising slope protection piles, top beams, anchor cables and coupling beams and is an integral reinforced concrete structure comprising two rows of slope protection piles, wherein the two rows of slope protection piles arranged at intervals are arranged on two the side walls of two foundation pits respectively; a pre-stressed anchor is arranged between every two adjacent slope protection piles; waist rails used for reinforcement are arranged between the two rows of slope protection piles; pile heads at the top of each row of slope protection piles are connected together through the top beams made of reinforced concretes; the top beams on the slope protection piles in the foundation pits are connected through the coupling beams; the anchor cables are arranged in the coupling beams; the two ends of the anchor cables are connected with the top beams through base plates and anchorage devices. Compared with the prior art, the foundation pit piled anchor dado concrete anchor cable top beam structure has the following advantages: as the two rows of slope protection piles form a steady and firm slope protection system through the anchor cables, the safety of a soil body between two structures is ensured, the construction working plane and transport corridor are increased, the excavated volume and backfill volume are reduced, the construction period is greatly shortened, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of foundation pit construction of adjacent underground structures, in particular to a foundation pit pile anchor wall concrete anchor cable crown beam structure and a construction method thereof. Background technique [0002] At present, in the civil construction of underground structures, when two underground structures are adjacent to each other by 20 to 30 meters, it is necessary to deal with the earthwork between the foundation pits of the two underground structures. One of the methods is to excavate all the soil between the structures. After the construction of the underground structure is completed, it is backfilled. The disadvantage is that the construction work area is reduced, and the excavation volume and vertical transportation cost are increased. [0003] Another method is to adopt the pile-anchor retaining wall structure, do several prestressed anchors in the soil between the piles between the retaining w...

AI Technical Summary

Problems solved by technology

[0003] Another method is to adopt the pile-anchor retaining wall structure, do several prestressed anchors in the soil between the piles between the retaining wall piles, and anchor the prestressed anchors and slope protection piles through the horizontal waist beam. The defect is: when the structure When the part in between is used as a place for vehicle transportation and material stacking, it is difficult to ensure the safety of the slope, and it is impossible to effectively use the area between structures

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