Method for predicting piling force when end part of precast pile encounters boulders

Abstract

The invention relates to a method for predicting piling force when the end part of a precast pile encounters boulders. The method comprises the following parameters: the length and diameter of a piled pile; the diameter of the boulder; the dynamic cohesive force, the dynamic internal friction angle, the effective internal friction angle, the static soil pressure coefficient, the weight above the underground water level and the weight below the underground water level of the soil body around the pile; pile lengths above and below the underground water level; the average weight of the soil body in the pile length range according to the effective weight in depth; the resistance of soil around the pile to piling; the average vertical stress, the average horizontal stress and the average normal stress which are applied to the lower half part of the boulder; the average shear strength of the lower half part of the boulder; resistance of the lower half part of the boulder to piling; the average vertical stress and the average horizontal stress are applied to the upper half part; the average normal stress, the average shear strength and the resistance to piling of the upper half part of the boulder; and piling force when the end of the precast pile encounters boulders. The pile driving force needed when the end of the precast pile encounters boulders can be determined, the construction scheme is determined and adjusted in time, and use is convenient.

Description

Technical field: [0001] The invention belongs to the field of foundation construction, in particular to a method for predicting pile driving force when the end of a prefabricated pile encounters a boulder. Background technique: [0002] There are often boulders in the weathered residual soil of granite. When driving precast piles, when the end of the prefabricated pile encounters boulders, piling will become difficult. In this case, can the prefabricated pile be driven to the predetermined depth smoothly? At present, most of them rely on experience to judge, and there is no reliable method to predict the determination of piling force. Invention content: [0003] The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the present invention is to provide a method for predicting the pile driving force when the end of the prefabricated pile encounters a boulder. [0004] In order to ach...

AI Technical Summary

Problems solved by technology

[0002] There are often boulders in the weathered residual soil of granite. When driving precast piles, when the end of the prefabricated pile encounters boulders, piling will become difficult. In this case, can the prefabricated pile be driven to the predetermined depth smoothly? , currently mostly rely on experience to determine, and there is no reliable method to predict the determination of piling force

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