Construction Method of Rigid-flexible Combined Pile for Strengthening Thick Overburden and Deeply Buried Soft Soil

Abstract

The invention relates to a hard-soft combined pile for strengthening thick covering layer deep-buried soft soil. The combined pile comprises a cement mortar pile, a large-diameter concrete pile and a prefabricated pipe pile, wherein the cement mortar pile is arranged on an upper thick covering layer, the large-diameter concrete pile is mounted on a lower soft soil layer, the prefabricated pipe pile is disposed at the center of a pile body of the combined pile, a grout liquid reinforcing area is arranged around the cement mortar pile, a prefabricated pile point is disposed at the bottom of the large-diameter concrete pile, the prefabricated pile point extends into a relative supporting layer, a geomembrane bag wraps the pile body of the combined pile, a grout-impermeable geotechnical cloth bag wraps the large-diameter concrete pile, a grout-permeable geotechnical cloth bag wraps the cement mortar pile, a plastic drainage plate or a soft water-permeable pipe is arranged outside the geomembrane bag, and a steel reinforcement cage is welded at the bottom of the prefabricated pipe pile. According to the hard-soft combined pile for strengthening the thick covering layer deep-buried soft soil, own features of two soil layers such as the thick covering layer and the soft soil layer are considered, different construction materials and processes are utilized, the problem of poor reinforcing effects by traditional construction methods can be solved, and the good reinforcing effect is achieved.

Description

technical field [0001] The invention relates to a rigid-flexible composite pile deep buried in soft soil with a thick covering layer and a construction method thereof, which belongs to the field of foundation reinforcement engineering and is suitable for foundation reinforcement treatment in construction engineering, road engineering and defense engineering. Background technique [0002] my country's construction industry has gone through decades of development, and building structures and construction methods have developed by leaps and bounds. With the continuous growth of the urban population, the scope of the city is constantly expanding, and the low-lying areas in the past have become flat and usable land after years of development. After years of landfilling, it has become a thick layer of covering soil. It seems that its bearing capacity is very high on the surface, but now the load of buildings is increasing. We not only need to ensure that the surface soil has bette...

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Problems solved by technology

[0005] In view of this, it is urgent to invent a method that is difficult to construct with traditional foundation treatment methods for thick covering layers, avoid excessive disturbance to thick covering layers, and have a better reinforcement effect on the lower soft foundation

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