地表沉降的双洞体叠加peck公式及数值分析  

The Peck Formula and Numerical Analysis of Surface Subsidence Caused by Tunnel Excavation

作　　者：任强 杨春英[2] 徐薇[3] 

机构地区：[1]中兵勘察设计研究院,北京100053 [2]中国建筑股份有限公司技术中心,北京101300 [3]中国矿业大学(北京),北京100083

出　　处：《安徽理工大学学报（自然科学版）》2013年第4期78-82,共5页Journal of Anhui University of Science and Technology:Natural Science

摘　　要：为解决地下隧道开挖引起地表沉降，结合广州某采用盾构推进形式地铁隧道实例，运用常规理论计算法与数值模拟方法计算地表沉降，研究地表变形特性。结果表明：双孔平行隧道开挖中地层损失是引起的地表沉降的主要因素；土体位移的叠加原理适用，地表沉降槽以两隧道中间位置为轴线基本对称分布在其两侧；地层损失率控制在1．5％～2％时，理论值较为接近模拟计算值。In order to solve the problem of surface subsidence caused by undergrouna tunnel excavauon, tar, t.~ Guangzhou subway tunnel excavation with shield construction as an example, the conventional theoretical calcula- tions and numerical simulation method were used to calculate surface subsidence, and study surface deformation properties. The results showed that ground loss is the main factor causing surface subsidence in the double paral- lel tunnels excavation process; Soil displacement superposition principle can be applied to double parallel tun- nels, using middle position of double parallel tunnels as axis, surface settlement curve distribution is symmetri- cal; When ground loss rate is 1.5% - 2% , the theoretical values are closer to the numerical simulation values.

关 键 词：双孔平行隧道 PECK公式 地表沉降 数值模拟 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]