文档介绍：现 代 隧 道 技 术
MODERN TUNNELLING TECHNOLOGY 大直径盾构隧道穿越建筑物群变形分析与控制措施
Buildings Specifications on Sute (Group) Co., Ltd., Shanghai 200092)
: The excavation construction of large-diameter shield tunnels would cause disturbance to the soils, resulting
Abstract
in ground settlement or heave, and thus bringing serious threats to the structural safety of the building complexes
above. Based on a large-diameter shield tunnel passing under a dense group of building complexes in an old neigh⁃
borhood, this paper first calculates the settlement deformation of the houses on key sections through 2D finite ele⁃
ment software, and then compares the calculation results with those through 3D finite element software to analyze
the applicability of the two calculation methods. Subsequently, on the basis of the 3D model, it studies the effects of
different initial load release rates on the ground surface and house deformation caused by the shield tunnel construc⁃
tion. Finally, by using the theoretical ground settlement data calculated by the Peck formula, it sorts out the internal
correlation among the initial load release rate, the ground settlement, and the ground loss rate, and puts forward rele⁃
vant measures to control deformation. The research results show that the smaller the initial load release rate is, the
smaller the ground surface and house s