Foundation pit pile-anchor supporting system capable of reducing buried depth of anchor cable and construction method of foundation pit pile-anchor supporting system

Abstract

The invention relates to the technical field of building construction, in particular to a foundation pit pile-anchor supporting system capable of reducing the buried depth of an anchor cable and a construction method thereof.The foundation pit pile-anchor supporting system comprises supporting row piles located on the edge of a foundation pit and stand column piles vertically inserted into a soil body, and the supporting row piles and the stand column piles are arranged front and back at intervals; steel stand columns extending upwards are arranged at the tops of the stand column piles, the upper portions of the supporting row piles are fixedly connected with profile steel enclosing purlins, the upper portions of the steel stand columns are fixedly connected with profile steel cross beams, and profile steel supporting beams used for fixedly connecting the profile steel enclosing purlins and the profile steel cross beams are arranged between the profile steel enclosing purlins and the profile steel cross beams. An obliquely-arranged anchor cable is arranged on the edge of the foundation pit in an outward penetrating mode, one end of the anchor cable is fixed into the soil body through an anchoring section, and the other end of the anchor cable is locked on the steel stand column through an anchorage device. In the invention, as most of the free sections of the anchor cables are positioned outside the soil body, the buried depth of the anchor cables can be greatly reduced, the construction is convenient, and meanwhile, the anchor cables can be effectively prevented from exceeding the land red line.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a foundation pit pile-anchor support system and a construction method for reducing the penetration depth of anchor cables. Background technique [0002] With the acceleration of urbanization, the depth of engineering foundation pits is getting deeper and deeper, and the surrounding environment of foundation pits is becoming more and more complex. The support of row piles combined with anchor cables is an effective way in deep foundation pit support. At present In the pile-anchor support, the anchor cable is anchored in the stable soil outside the foundation pit and locked on the waist beam set on the enclosure structure. The full length of the anchor cable is located in the soil, and the length of the free section is not less than 5 meters. According to the soil conditions and the design tension value, the length varies from 15 to 30 meters. The full length of the a...

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Problems solved by technology

[0002] With the acceleration of urbanization, the depth of engineering foundation pits is getting deeper and deeper, and the surrounding environment of foundation pits is becoming more and more complex. The support of row piles combined with anchor cables is an effective way in deep foundation pit support. At present In the pile-anchor support, the anchor cable is anchored in the stable soil outside the foundation pit and locked on the waist beam set on the enclosure structure. The full length of the anchor cable is located in the soil, and the length of the free section is not less than 5 meters. According to the soil conditions and the design tension value, the length varies from 15 to 30 meters. The full length of the anchor cable in the pile-anchor support is set in the soil outside the foundation pit, which often makes the extension range of the anchor cable exceed the land used for this project. The red line is restricted to be used as an obstacle to the construction of adjacent projects outside the red line

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