Double-row pile foundation pit supporting particle flow numerical simulation method

Abstract

The invention relates to the technical field of numerical simulation, and discloses a double-row pile foundation pit support particle flow numerical simulation method, which comprises the following steps of fitting and simulating a unit structure unit by using Clump particles with different diameters, and splicing the structure unit into the shape of a double-row pile structure; establishing a double-row pile structure with the same shape through finite element software, conducting equivalent stress analysis on a double-row pile structure model, and conducting mesoscopic parameter calibration of a particle flow double-row pile numerical value structure according to displacement deformation of finite element double-row piles; generating foundation pit soil layer particles based on the particle flow, and carrying out mesoscopic parameter calibration of each soil layer particle of the foundation pit according to a macroscopic stress-strain mechanical curve obtained by an indoor triaxial test; generating an initial soil layer of the foundation pit by using a layered filling method, and endowing each soil layer of the particle flow foundation pit with meso-parameters calibrated by different soil layer particles; and establishing an excavation support calculation process of the integral particle flow double-row pile foundation pit support model. According to the invention, numerical simulation of double-row pile support is realized.

Description

technical field [0001] The invention relates to a numerical simulation method based on a particle flow method, in particular to a particle flow numerical method for double-row pile support. Background technique [0002] With the rapid development of the city, problems such as traffic congestion, lack of land resources, and deterioration of the ecological environment have become increasingly prominent. In order to improve the livability, resilience, and inclusiveness of the city, people have gradually increased the development of underground structures, such as subway stations, highways, etc. Tunnels, pedestrian tunnels, etc. often involve deep foundation pit engineering. In the increasingly narrow urban space environment, the excavation of foundation pits often affects the deformation of surrounding existing buildings, tunnels, and pipelines. Therefore, the form of enclosure structure of double-row piles is more and more favored by engineering designers. [0003] At present...

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Problems solved by technology

However, its application research in the field of double-row pile foundation pit support is still rare

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