Method for measuring collapse influence factors of punched bored concrete pile hole wall

Abstract

The invention provides a method for measuring collapse influence factors of a punched bored concrete pile hole wall. The method for measuring collapse influence factors of the punched bored concrete pile hole wall comprises the following steps that collapse hole testing study area is confirmed; punched hole geometry factors of the collapse hole testing study area are collected and a theory volume Vi and an actual volume ( please refer to the formula )of a punched hole are calculated; qualitative factors and quantitative factors of the punched hole are confirmed and the qualitative factors and the quantitative factors are respectively defined; a collapse response matrix is confirmed; a collapse rate of the drill hole and a collapse hole reference variable are confirmed; a correlation evaluation formula of collapse hole collapse factors is established; a precision evaluation is conducted on the correlation evaluation formula of the collapse hole collapse factors; an analysis and an evaluation are conducted on an evaluation precision of a correlation prediction formula of the collapse hole collapse factors by applying a complex phase correlation figure of the correlation evaluation formula; an effect degree and size of the collapse factors of all collapse holes are analyzed and evaluated, and major collapse factors and minor collapse factors of the collapse holes are confirmed. According to the method for measuring collapse influence factors of the punched bored concrete pile hole wall, due to the fact that the qualitative variables are divided based on the values, the important practical value towards the analysis and evaluation of influence factors of a hole wall of a bored concrete pile collapse hole is achieved.

Description

technical field [0001] The invention relates to the technical fields of fixing buildings and testing and measurement, and relates to the judgment of factors affecting pile hole wall collapse in the process of pouring pile holes, and in particular to a method for determining the influencing factors of bored pile hole wall collapse. Background technique [0002] The collapse and failure of the bored pile hole wall has always been the key factor and problem that affects and determines the engineering quality and construction progress of the bored pile, and has gradually become the "bottleneck" of the engineering quality and construction progress of many large-aperture bored piles. In the southeastern coastal areas of China, there are widely distributed soft cohesive soil layers deposited in marine, lacustrine and river facies. High water content, low strength, high compressibility, poor water permeability, and deep burial are the characteristics of this type of soil. Under the ...

AI Technical Summary

Problems solved by technology

This method is to establish a model through statistical data, and use the model to conduct quantitative analysis of the collapse-causing factors. The disadvantage of this type of method is that it can only model and analyze the quantitative collapse-causing factors, and cannot analyze and evaluate the qualitative collapse-causing factors. It is concluded that there is a gap between the model and the actual collapse hole, resulting in a large error between the quantitative index and the actual hole. The results are different under different conditions, and the prediction effect is often unsatisfactory, which affects the further treatment of the bored pile collapse hole

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