Stiff composite pile construction process

Abstract

The invention discloses a stiff composite pile construction process. The stiff composite pile construction process comprises the following steps that S1, carrier pile construction is conducted, specifically, a, a cement-soil mixing pile with the diameter of phi 500-900 mm is adopted for a carrier pile, full pile casing follow-up impact hole forming is conducted, cement mortar or fine aggregate concrete is poured into a hole, the cement doping amount in an empty drilling area is 9%-11%, and the cement doping amount in an effective pile length area is 17%-21%; and b, carrier construction is completed; S2, a pile casing is pulled out by a carrier pile machine; and S3, a precast pile body is put down, and the pile is conveyed to the designed elevation in a static pressure or hammering mode, a, the precast pile body adopts a prestressed concrete pipe pile, the effective pile length is 42 m, and the precast pile body is constructed within 6 h after carrier construction is completed. According to the stiff composite pile construction process, construction is convenient, the secondary compaction and reinforcement effect on filling soil around a pile body is achieved, the physical and mechanical properties of a soil body around the pile are effectively improved, the stiff composite pile construction process can adapt to complex geological conditions such as deep filling soil, the construction process is different from a conventional soil compaction process, and the influence on the surrounding environment is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of composite pile construction, in particular to a construction technique of a rigid composite pile. Background technique [0002] With the continuous development of urban construction, there are more and more construction projects under complex geological conditions such as deep fill and collapsible soil. As a foundation form, the stiffness composite pile has more and more advantages under similar geological conditions. more and more obvious. [0003] The stiff composite pile is composed of an outer pile body and an inner pile core. The soil of the pile body is reinforced to improve the mechanical properties of the undisturbed soil, and then the inner pile core is implanted to form a composite pile body. [0004] Due to the increasingly complex geological conditions of the construction site, there are certain defects in the traditional rigid composite pile construction technology. It is difficult to meet ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of stiff composite pile construction technology, to solve the above-mentioned background technology because the geological conditions of the construction site are more and more complex, so there are certain defects in the traditional stiff composite pile construction technology , for example, there are the following defects in deep filling sites: it is greatly affected by construction waste and other miscellaneous fillings, and the traditional mixing or rotary spraying hole-forming process is difficult to meet the requirements

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