Three-dimensional finite element analysis of new-type double-row composite supporting structure in deep excavation
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Abstract:
The composite supporting structure which consists of two or more kinds of supporting structures has received much attention from researchers and designers, and has been applied in complex soft-soil deep excavation engineering to ensure the safety, economy, and stability of the engineering. Considering there are few studies on the new-type double-row composite supporting structure which consists of diaphragm wall, bored pile, and high pressure jet grouting pile, we took one soft foundation pit engineering as a case study, and designed the new-type double-row composite supporting structure. Using the three-dimensional elastoplastic finite element method, we conducted numerical simulation of the stratified excavation and precipitation of the engineering. Through the analysis of the structural performance of the new-type double-row composite supporting structure and the influence of excavation on the surrounding environment, we verified the validity of the design. This research can provide help to the application and popularization of the new-type composite supporting structure in deep excavation engineering.
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