A method for checking and evaluating the bearing capacity of inclined pipe piles

Abstract

An inclined pipe pile bearing capacity inspection and evaluation method comprises the steps that a low strain method is adopted for general inspection, the integration of pile bodies of concrete pilesis detected, the defect levels and positions of the pile bodies are judged, and low strain method curves of each foundation pile are obtained; according to the low strain method detection results, the piles with obvious and intense reflected wave signals in the same direction before the 2L / c moment are reinforced, and a horizontal displacement variation of a pile block of each foundation pile after pile formation is obtained through a measuring method; and according to the low strain method results and the pile block displacement variations, the foundation piles are classified, statistical analysis of the bearing capacities of all classes of foundation piles is conducted through high strain method tests on the basis of classification, thus, the bearing capacities of all the foundation piles of a unit project are effectively evaluated, and design bases are provided for preference and optimization of reinforcement schemes of inclined pipe piles. The accuracy of detection and evaluationoperation is improved, social cost is reduced, and social resources are saved.

Description

【Technical field】 [0001] The invention belongs to the technical field of geotechnical engineering detection, inspection and evaluation, and specifically refers to a bearing capacity inspection and evaluation method of inclined pipe piles. 【Background technique】 [0002] Prestressed pipe piles are widely used in industrial and civil buildings because of their strong adaptability, fast construction speed, high work efficiency, short construction period, pile resistance, strong penetration, and wide range of design options. However, in soft soil areas, due to improper piling and excavation methods, excessive soil displacement will occur, causing the prestressed pipe pile to tilt, deviate, or even break, which will cause great harm to the safety of the project. Reinforcement and other engineering treatment methods, effective use of the residual bearing capacity of the treated foundation piles, and proposed targeted reinforcement and reinforcement measures are important issues in...

AI Technical Summary

Problems solved by technology

However, in soft soil areas, due to improper piling and excavation methods, excessive soil displacement will occur, causing the prestressed pipe pile to tilt, deviate, or even break, which will cause great harm to the safety of the project. Reinforcement and other engineering treatment methods, effective use of the residual bearing capacity of the treated foundation piles, and proposed targeted reinforcement and reinforcement measures are important issues in current engineering practice

[0003] The inclination of prestressed pipe piles often occurs on a large scale, often tens, or even hundreds, with defects ranging from deep to shallow, deviations from large to small, and fractures of varying severity. To check the bearing capacity of the piles, the sampling ratio is too small to reflect the actual situation of the samples, and the full spot check is not allowed in terms of economy and construction period.

[0004] Chinese invention patent 201510132177.1 discloses a method for checking and evaluating the bearing capacity of rock-socketed piles, but it is difficult to determine the actual bearing capacity of each pile, resulting in the inability to reasonably target reinforcement and repair

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