浅埋暗挖法下穿既有盾构隧道的变形特性分析

doi:10.13722/j.cnki.jrme.2014.s2.065

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Abstract Using shallow tunneling method，tunnels between Pinganli and Beihaibei of Beijing Metro Line 6 traverse adjacently under Line 4 which is a shield tunnel. To obtain the deformation law of existing structures and ground surface settlement，the measured displacement of ground surface settlement and existing structures were analyzed. The research shows that：(1) For the stratum in non-crossing part，the maximum values of settlement decrease with the increase of buried depth of tunnel. If center distance between two tunnels is less than 2D，the surface subsidence is “single groove” shaped，otherwise the surface subsidence is “double grooves” shaped. In the crossing part，deformation of existing structures is “double groove”shaped，the surface subsidence is “single groove”shaped. (2) The maximum ground surface settlement of existing structures are 7.32 mm and 6.69 mm. The values of V are 0.36%，0.45%，the values of K range from 0.41 to 2.43. (3) The maximum ground surface settlement in crossing part is about 24%–27% of that in-non crossing part and the value of K is about 1.2–2.3 times. The research result can provide reference to the similar engineering.

Key words： tunnelling engineering deformation of existing tunnel ground deformation field measurement

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	Articles by authors
	LI Qianqian1
	ZHANG Dingli1
	FANG Qian1
	LI Dong2

Cite this article:

LI Qianqian1,ZHANG Dingli1,FANG Qian1, et al. Study oF deformation characteristics of tunnels traversing adjacently under shield tunnels by shallow tunneling method[J]. , 2014, 33(S2): 3911-3918.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.065 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/3911

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