Lagged settlement in sandy cobble strata and earth pressure on shield tunnel

被引：10
|
作者：
Huang, Jizhi [1 ]
Zhang, Yong [2 ,3 ,4 ]
Ouyang, Xiaowei [5 ]
Xu, Guoyuan [1 ]
机构：
[1] South China Univ Technol, Sch Civil Engn & Transportat, Guangzhou 510641, Guangdong, Peoples R China
[2] Fuzhou Univ, Fujian Prov Univ, Res Ctr Adv Civil Engn Mat, Fuzhou 350116, Fujian, Peoples R China
[3] Fuzhou Univ, Coll Civil Engn, Fuzhou 350116, Fujian, Peoples R China
[4] Delft Univ Technol, Fac Civil Engn & Geosci, Dept 3MD, Microlab,Sect Mat & Environm, Stevinweg 1, NL-2628 CN Delft, Netherlands
[5] Guangzhou Univ, Joint Res Ctr Engn Struct Disaster Prevent & Cont, Tamkang Univ, Guangzhou 510006, Guangdong, Peoples R China
来源：
MATHEMATICAL BIOSCIENCES AND ENGINEERING | 2019年 / 16卷 / 06期
关键词：
sandy cobble soil; lagged settlement; loosened earth pressure; coefficient of lateral earth pressure; ellipsoid theory of particle flows; STABILITY;
D O I：
10.3934/mbe.2019309
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Lagged settlement is a typical accident induced by shield construction in sandy cobble strata. This paper analyzed the process and mechanism of lagged settlement, results show that all phases are in accord with the characteristics of ellipsoid theory of particle flows. Based on this theory, a method for calculating coefficient of lateral earth pressure and loosened earth pressure is proposed in this research. For the coefficient of lateral earth pressure, the boundary of loosened ellipsoid is divided into two parts, the arch zone and the excavation zone, and the lateral pressure coefficients are derived respectively according to the stress state. For loosened earth pressure on tunnel, the Terzaghi earth pressure theory and Protodyakonov earth pressure theory are adapted in different conditions according to the state of loosened cobble soil. Theories developed in this study can be applied on determination of shield excavation parameters, as well as calculation of loosened earth pressure and control of tunnel support.
引用
收藏
页码：6209 / 6230
页数：22
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