Method for determining optimal cement mixing amount of cemented soil stiff composite pile

Abstract

The invention belongs to the technical field of foundation treatment and pile foundation engineering, and relates to a method for determining the optimal cement mixing amount of a cemented soil stiff composite pile. The method comprises the steps that a first cemented soil stiff composite pile is manufactured under the initial mixing amount; drawing an unconfined compressive strength curve graph; the vertical ultimate bearing capacity of the pile body of the first cemented soil stiff composite pile is detected, and the damage form of the pile body is observed; the cement mixing amount is adjusted through a damage form, a pile is formed again, a second cemented soil stiff composite pile is manufactured, a field load test is carried out, the damage form is changed, drawing is carried out with the vertical ultimate bearing capacity as the longitudinal axis and the unconfined compressive strength as the transverse axis, and the optimal cement mixing amount is determined; the vertical bearing capacity of the pile type can meet the design requirement, meanwhile, the economic optimum and environment protection principle is considered, and cement consumption is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of foundation treatment and pile foundation engineering, and relates to a method for determining the optimum cement content of a cement-soil stiffness composite pile. Background technique [0002] The foundation is the foundation of the building, and the quality of the foundation will directly affect the safety, economy and rationality of the building. With the continuous development of my country's modernization construction, the construction of high-rise and large-scale buildings has put forward higher requirements for building foundation engineering and foundation treatment technology. Cement-soil-stiff composite pile refers to a composite pile formed by concentrically implanting a rigid core pile into a cement-soil mixing pile that has not yet been initially set. This type of pile combines the advantages of high lateral friction resistance of cement-soil piles and high bearing capacity of core piles, ma...

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Problems solved by technology

[0004] The present invention overcomes the deficiencies of the prior art, and proposes a method for determining the optimal cement content of cement-soil-strength composite piles, which solves the problem of blindness in the selection of cement-soil-strength composite piles in actual engineering applications

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