Construction method of stiffening core curtain pile and wall protection pile anchor combined supporting structure

Abstract

The invention discloses a construction method of a stiffening core curtain pile and wall protection pile anchor combined supporting structure. The supporting structure comprises concrete cast-in-placepiles and a water stop curtain, wherein the water stop curtain is a high-pressure rotary jet pile water stop curtain; a shape steel stiffening core is driven into the water stop curtain along the axis to form a stiffening core water stop curtain; the stiffening core water stop curtain and the concrete cast-in-place piles are arranged at intervals and meshed to be arranged in a straight line, theconcrete cast-in-place piles and the stiffening core water stop curtain are connected into a whole through top beams, and the waist of each concrete cast-in-place pile is connected with a waist beam;and prestressed anchor rods are installed on the waist beams between every two adjacent concrete cast-in-place piles. The method accords with the stress characteristic of the supporting structure, thestrength of the stiffening core water stop curtain is fully utilized on the premise of meeting the water stop requirement, the rigidity and strength of the combined pile supporting structure are improved, deformation of the side wall of a foundation pit can be better controlled, materials are saved under the same deep foundation pit condition, the shape steel stiffness core can be recycled, the cost is reduced, and underground space pollution caused by the shape steel stiffness core left underground is avoided.

Description

technical field [0001] The invention relates to the field of foundation pit support under the condition of abundant groundwater, in particular to a construction method for a combined support structure of a curtain pile with a core and a wall-protecting pile-anchor. Background technique [0002] In engineering practice, in order to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, foundation pit support structures are often used to support, reinforce and protect the side walls of the foundation pit and the surrounding environment. Unloading during excavation of the foundation pit makes the earth pressure of the support structure on both sides of the foundation pit form a pressure difference, which in turn causes the lateral deformation of the support structure. Therefore, limiting the lateral displacement is of great significance to the excavation of the foundation pit and the surrounding environment. [0003] ...

AI Technical Summary

Problems solved by technology

[0003] Under complex ground conditions, especially when the ground is weak and the groundwater is abundant, the support method of pile anchors and water-stop curtains is usually used. The high-pressure jet grouting piles used in the water-stop curtain only play the role of water-stop, and their own strength is not enough. fully utilized

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