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第 3卷第 5期地下空间与工程学报 Vol. 3
2007年 10月 Chinese Journal of Underground Space and Engineering Oct. 2007
曲线隧道盾构引起地表沉降分析
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2 周诗俊,王金安
(北京科技大学土木与环境工程学院,北京 100083)
摘要:以某市地铁工程双曲线隧道区间为研究背景,建立了三维有限差分数值模型。通
过数值分析得出盾构引起地表沉降的范围、地层水平移动规律以及双线隧道之间的相互影响。
曲线隧道施工不仅在地表内侧引起的沉降范围较大,还影响了隧道周围土体的水平移动趋势。
随着曲线半径的减小,隧道两侧沉降范围的差别逐渐增大,外侧土体的水平移动趋势向内侧扩
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展;随着隧道埋深的增加,沉降范围也逐渐增大,沉降值却不断减小。
关键词: 盾构;沉降;曲线隧道;曲线半径;埋深
中图分类号: U455. 43; TU433 文献标识码: A 文章编号: 1673 0836 (2007) 05 0909 05
The Surface Settlem en t Ana lysis of Curved Tunnel Sh ield
ZHOU Shi - jun ,WANG J in - an
(C ivil and Environm ental Engineering School, B eijing University of Science and Technology, B eijing 100083, China)
Abstract: Based on a subway p rojectwith a double curved tunnel section in some city, a three - dimensional fi
nite difference model is established to carry out numerical simulation. W ith the simulation results, the range of the
ground surface settlement, laws of the strata horizontal disp lacement and the interaction of double tunnels by shield
excavation are analyzed. The range of inside surface settlement is great in the curved tunnels construction and the
changes of the soil horizontal disp lacement take p lace around the tunnel. The difference of both - side settlement
range increases and the outside soil horizontal disp lacement trend extends to the inside with