Longitudinal deformation profile of a tunnel in weak rock mass by using the back analysis method

doi:10.1016/j.tust.2017.10.003

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Longitudinal deformation profile of a tunnel in weak rock mass by using the back analysis method
	Luo, Yanbin 2; Chen, Jianxun 2; Chen, Yi 1; Diao, Pengsheng 2; Qiao, Xiong 3
刊名	TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
	2018-01
卷号	71 页码:478-493
关键词	Weak rock mass tunnel Longitudinal deformation profile (LDP) Complete deformation Displacement back analysis Numerical simulation
ISSN号	0886-7798
DOI	10.1016/j.tust.2017.10.003
英文摘要	Analysis, of the rock mass deformation behavior is a very important aspect of the safety assessment for tunnel construction in weak rock mass. In this paper, the deformation characteristics of a soft rock mass tunnel using three beaches construction method were investigated, which include the crown settlement and horizontal displacement and have 9 sections with 3 different construction schemes. The optimized construction schemes by decreasing the beaches length and changing the geologist of primary support were proposed. Then, applying the displacement back analysis method to calculate the rock mass parameters, double parameters were analyzed by using the golden section method. Results show that the tunnel deformations were affected by the elastic modulus E and the lateral pressure coefficient lambda of rock mass, and the change of E has greater influence than lambda. on the tunnel deformation. The change of lambda has greater influence on the crown settlement than that on the horizontal displacement. Furthermore, the regularity and characteristics of longitudinal deformation profile (LDP) in a weak rock mass tunnel was studied by utilizing the Fast Lagrangian Analysis of Continua (FLAC), and the LDP of the three long-beach construction scheme and the three short-beach construction scheme were compared. The results show that the complete displacements of tunnel under the three short-beach construction scheme condition by decreasing the lengths of the middle and lower benches are smaller than that under the three short beach construction scheme condition, however the pre-deformation of the tunnel deformation under this two construction scheme conditions is nearly the same. The extrusion deformation at the tunnel face of the three short-beach construction scheme is larger than that of the three long-beach construction scheme. Therefore, increasing the area of the core soil is a feasible measure to control the extrusion deformation on the tunnel face. Finally, the tunnel optimized construction scheme was verified benefit the tunnel stability. The measures of decreasing the length of middle and lower bench and closing the invert early and immediately will benefit the tunnel stability.
资助项目	Chang Jiang Scholars Program[T2014214]
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000418212600041
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32926]
专题	土木工程学院
通讯作者	Luo, Yanbin; Chen, Jianxun
作者单位	1.China Guangzhou Metro Design & Res Inst Co Ltd, Changsha 410000, Hunan, Peoples R China 2.Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China 3.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yanbin,Chen, Jianxun,Chen, Yi,et al. Longitudinal deformation profile of a tunnel in weak rock mass by using the back analysis method[J]. TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,2018,71:478-493.
APA	Luo, Yanbin,Chen, Jianxun,Chen, Yi,Diao, Pengsheng,&Qiao, Xiong.(2018).Longitudinal deformation profile of a tunnel in weak rock mass by using the back analysis method.TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY,71,478-493.
MLA	Luo, Yanbin,et al."Longitudinal deformation profile of a tunnel in weak rock mass by using the back analysis method".TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY 71(2018):478-493.