A method for determining the diameter of high-pressure jet grouting piles considering all construction parameters and soil properties

Abstract

The invention provides a high-pressure jet grouting pile diameter determination method considering all construction parameters and soil body characteristics. The method comprises the following steps that 1, construction site geological exploration is carried out; 2, a limit cutting distance of a jet flow damage soil body is determined; 3, a reduction coefficient considering the spray nozzle moving speed is determined; 4, on the basis of the limit cutting distance of the jet flow damage soil body and the reduction coefficient considering the spray nozzle moving speed, the diameter of a high-pressure jet grouting pile is determined by aiming a single pipe method, a duplex pipe method and a triple pipe method. The method has the advantages that the defects of physical significance lack of parameters, great prediction deviation, inconsiderable pile diameter influence factor, narrow application range and the like in the existing method are overcome, and the accurate determination of the high-pressure jet grouting pile by the single pipe method, the duplex pipe method and the triple pipe method can be realized.

Description

technical field [0001] The invention relates to a method in the technical field of construction engineering, in particular to a method for determining the diameter of single-pipe, double-pipe and triple-pipe high-pressure jet grouting piles while considering all construction parameters and soil properties. Background technique [0002] With the continuous development of civil engineering construction in our country, high-pressure rotary spraying technology has been widely used as a foundation treatment method with relatively simple construction operations, such as tunnel engineering and foundation pit engineering. The high-pressure rotary grouting technology uses a rotating nozzle to eject a high-speed jet to cut the soil, and then mixes the cement slurry with the cut soil to form a cement-soil mixture. After a period of chemical reaction, it solidifies and finally forms a high-pressure rotary grouting pile. Since the pile forming process of high-pressure jet grouting is an ...

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Problems solved by technology

[0004] Aiming at the defects in the existing method, the purpose of the present invention is to provide a method for determining the diameter of the high-pressure jet grouting pile considering all construction parameters and soil properties at the same time. Large deviation, incomplete consideration of pile diameter influencing factors, narrow application range and other shortcomings and deficiencies, to realize the accurate determination of the diameter of high-pressure jet grouting piles by single-pipe method, double-pipe method and triple-pipe method

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