A simulation method for the excavation process of foundation pit with cantilever retaining structure

Abstract

The invention discloses a stimulation method for a foundation pit excavation process of a cantilever type retaining structure which is reasonable in design, is flexible in use and is low in cost. Thestimulation method comprises the following steps of: rotating a loading handle of a loading device a1 at a topmost layer at one side of a stimulation device, moving a force transmission rod of the loading device to the outer side of a side beam on which the force transmission rod is located to realize unloading, thereby completing excavation for a first layer of a soil body; continuously acting astimulation pile by a set number b1 of a symmetrical loading device at the right side of the stimulation pile, enabling the top of the stimulation pile to bend and deform rightwards, extending a spring in the loading device b1 at the right side, converting static soil pressure into active soil pressure, enabling other parts of the stimulation pile to generate corresponding bending deformation until reaching a force balance state, circulating in this mode until completing unloading for the soil body within all ranges at the excavation time of a foundation pit, and recording horizontal soil pressure and horizontal displacement, which correspond to different sections of a pile body of a retaining pile, of the soil body excavated every step, thereby realizing stimulation on the foundation pitcantilever type retaining structure.

Description

technical field [0001] The invention relates to a method for simulating the excavation process of a foundation pit of a cantilever retaining structure, belonging to the technical field of civil engineering design and construction. Background technique [0002] In the process of continuous development of modern cities, buildings tend to be denser, and high-rise buildings and underground facilities increase. There will be deep foundation pit excavation and stability problems in the construction of the substructure of high-rise buildings in densely built areas. Since the calculation of support engineering becomes more complex with the change of soil layer, multiple soil layers are often simplified in the design process, and the construction and support of deep foundation pits are often based on experience and engineering analogy, especially for the optimization of support schemes. And the optimization research of supporting components is not in-depth systematically. [0003] I...

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Problems solved by technology

[0004] The present invention aims at the current problem of foundation pit support piles, in order to realize better theoretical analysis and simulation teaching, and also to complete reasonable support design and optimal economic benefits, and discloses a cantilever with reasonable design, flexible use and low cost Simulation Method for Excavation Process of Foundation Pit with Retaining Structure

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