A construction method of composite piles made of y-shaped three-dimensional drainage boards with strong cores and loose materials

Abstract

The invention discloses a Y-shaped stereoscopic drain board and stiffness core discrete material composite pile and a construction method. The Y-shaped stereoscopic drain board and stiffness core discrete material composite pile is characterized in that a Y-shaped stereoscopic board is arranged in the center of discrete materials, the core body of the stereoscopic drain board is Y-shaped, i.e., every two side walls of the drain board form a 120-degree included angle, a drain board outer wrapping filter membrane is arranged at the external part of the drain board, flexible reinforcing bars are uniformly and symmetrically arranged at the center of the each Y-shaped stereoscopic drain board side wall, the Y-shaped stereoscopic drain board is connected with an immersed tube and a steel plate pile tip during construction, then the steel immersed tube is pressed into a foundation, the Y-shaped stereoscopic drain board is tightened after the immersed tube reaches design depth, the discrete materials are injected into the steel immersed tube, and finally vibration and tube drawing are conducted to form a pile body. The Y-shaped stereoscopic drain board and stiffness core discrete material composite pile and the construction method have the advantages that the drainage range of the drain board is effectively expanded, the problem that a common drain board is carried back during construction is overcome, the clogging of the drain board is effectively prevented through the outer wrapping discrete materials, and compared with the traditional discrete material pile, the drainage effect is better and the technical and economic benefits are better.

Description

technical field [0001] The invention relates to a composite pile and a construction method, in particular to a Y-shaped three-dimensional drainage plate strong core bulk material composite pile and a construction method. The utility model belongs to the field of foundation treatment and is suitable for soft soil foundation treatment engineering. Background technique [0002] my country has a vast territory, complex geological conditions and large differences between regions. There are many types of weak foundations and they are widely distributed. In Dalian, Tianjin, Jiangsu, Zhejiang, Guangdong and other places, there are a large number of weak foundations with high water content, high compressibility and low bearing capacity. earth. How to effectively improve the bearing capacity of deep soft soil foundations and control soil deformation has always been one of the most important problems in geotechnical engineering. At present, there are mainly two types of treatment meas...

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Problems solved by technology

[0006] However, the drainage effect of the bulk material pile is not as good as that of the drainage board, and it is prone to blockage. At the same time, as the reinforcement depth of the bulk material pile deepens, the quality of the pile body decreases, and the drainage effect is greatly affected. The scope of its drainage is limited

[0007] To sum up, the existing structure of the drainage board has the problem that the drainage range is not large, and the drainage board needs to be installed intensively in a large area, resulting in high cost. At the same time, the traditional construction technology of the drainage board is easy to cause the problems of belting and blocking of the drainage board , which seriously affects the drainage effect of the drainage board structure

The bulk material pile also has the disadvantage of poor drainage effect; in view of this, in order to achieve the purpose of expanding the drainage range of the foundation and preventing the drainage path from being blocked, it is urgent to invent a kind of drainage effect that is good, easy to construct, and can effectively overcome the problem. Three-dimensional drainage board backbanding problem and drainage structure with drainage board blocked

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