Centrifuge model test investigation on deformation of deep excavation with frame-top-down method

被引：0

作者：

Bai, Ting ^{[1
,2
]}

Li, Jingpei ^{[1
,3
]}

Liang, Fayun ^{[1
,3
]}

机构：

[1] College of Civil Engineering, Tongji University

[2] Department of Housing and Urban-Rural Development

[3] Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University

来源：

Tongji Daxue Xuebao/Journal of Tongji University | 2014年 / 42卷 / 05期

关键词：

Centrifuge model test; Deformation behaviors; Excavation engineering; Frame-top-down method;

D O I：

10.3969/j.issn.0253-374x.2014.05.004

中图分类号：

学科分类号：

摘要：

Taking one large deep excavation as the research background, this paper compares the effect of deformation control of the frame-top-down scheme and the traditional top-down scheme through centrifugal model tests. In addition, it further studies the relationship between the maximum wall deflections and the maximum ground settlements, as well as the size and scope of ground settlements. The test results show that the excavation-induced maximum ground settlements using frame-top-down method δvm is 0.35~0.7 times of the excavation-induced maximum wall deflection δhm, and unsupported exposure time has some effect on δvm/δhm. The predicted results by empirical prediction method based on measured data is much different from the test results. Excavation-induced performance using frame-top-down and traditional top-down construction schemes is similar, and the excavation-induced performance using frame-top-down scheme can be controlled effectively. The conclusion of this paper has significant referential meaning for designs and constructions of actual engineering.

引用

页码：683 / 688

页数：5

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