A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance of Diaphragm Walls in Soft Clay of a Deep Basement Excavation
This study surveyed the response of diaphragm walls with a length of 51 m during a large basement excavation (approximately 9310 m2, depth of 30.2 m) in soft soil in Hangzhou, China. The field data of wall deflections, maximum wall deflection rate, stress development of diaphragm walls, axial force of struts, and measured horizontal earth pressures were extensively investigated. The following conclusions were drawn: deep excavation can produce greater stress unloading compared with shallow excavation, which results in the diaphragm walls producing more significant deflection; the load transfer to the struts caused by the excavation is completed within two to three weeks after strut casting; the deeper basement excavation only has a minor effect on the distant axial forces of the struts; the horizontal earth pressure behind the diaphragm wall is linearly distributed along the depth. This paper proposes a general earth pressure AEP envelope based on the investigated case and similar cases.
Performance of Diaphragm Walls in Soft Clay of a Deep Basement Excavation
This study surveyed the response of diaphragm walls with a length of 51 m during a large basement excavation (approximately 9310 m2, depth of 30.2 m) in soft soil in Hangzhou, China. The field data of wall deflections, maximum wall deflection rate, stress development of diaphragm walls, axial force of struts, and measured horizontal earth pressures were extensively investigated. The following conclusions were drawn: deep excavation can produce greater stress unloading compared with shallow excavation, which results in the diaphragm walls producing more significant deflection; the load transfer to the struts caused by the excavation is completed within two to three weeks after strut casting; the deeper basement excavation only has a minor effect on the distant axial forces of the struts; the horizontal earth pressure behind the diaphragm wall is linearly distributed along the depth. This paper proposes a general earth pressure AEP envelope based on the investigated case and similar cases.
Performance of Diaphragm Walls in Soft Clay of a Deep Basement Excavation
Soil Mech Found Eng
Cheng, K. (author) / Xu, R.-Q. (author) / Ying, H.-W. (author) / Gan, X.-L. (author) / Zhang, L.-S. (author)
Soil Mechanics and Foundation Engineering ; 59 ; 159-166
2022-05-01
8 pages
Article (Journal)
Electronic Resource
English
Performance of Diaphragm Walls in Soft Clay of a Deep Basement Excavation
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