Centrifuge model tests on excavation in Shanghai soft soil layers using in-flight excavation tools

被引：0

作者：

Ma X. ^{[1
,2
]}

Cao M. ^{[1
,2
]}

机构：

[1] Department of Geotechnical Engineering, Tongji University, Shanghai

[2] Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai

来源：

Tumu Gongcheng Xuebao/China Civil Engineering Journal | 2023年 / 56卷 / 08期

关键词：

centrifuge model test; displacement; foundation pit excavation; in-flight excavation device; settlement;

D O I：

10.15951/j.tmgcxb.22030220

中图分类号：

学科分类号：

摘要：

The magnitude of wall displacement and the ground settlement profile during excavation are vital in assessing potential damage to neighbouring structures and buried services. A new device for the centrifuge model testing on whole process of excavation was developed. The device was confirmed to be effective in simulating the excavation of foundation pits at the 85-g level by a series of small-scale centrifuge model tests. For unstrutted excavation, the movement of the retaining wall was similar to rotating about a fixed point near the wall toe and the maximum incremental cantilever wall deflection was at the wall crest. The ground settlement curve is spandrel and the maximum settlement occurs near the retaining wall. For the strutted excavation, the movement of the retaining wall was concave settlement trough, and maximum deformation point of the retaining wall was located near the excavation face. The ground settlement curve is concave one, and the maximum ground settlement usually occurs at the same distance from the retaining wall. © 2023 Editorial Office of China Civil Engineering Journal. All rights reserved.

引用

页码：131 / 139

页数：8

共 30 条

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