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。
Based on a subway project with a double curved tunnel section in some city, a three - dimensional finite difference model is established to carry out numerical simulation. With the simulation results, the range of the ground surface settlement, laws of the strata horizontal displacement 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 displacement take place around the tunnel. The difference of both - side settlement range increases and the outside soil horizontal displacement trend extends to the inside with the reduction of curve radius. The surface settlement range increases with the addition of tunnel buried depth but the settlement decreases.
出处
《地下空间与工程学报》
CSCD
2007年第5期909-913,971,共6页
Chinese Journal of Underground Space and Engineering
关键词
盾构
沉降
曲线隧道
曲线半径
埋深
shield
settlement
curved tunnels
curve radius
buried depth
