隧道开挖引起土层沉降槽曲线形态的分析与计算  

Analysis and calculation of surface and subsurface settlement trough profiles due to tunneling

作　　者：姜忻良[1] 赵志民[1] 李园[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《岩土力学》2004年第10期1542-1544,共3页Rock and Soil Mechanics

基　　金：天津市科技发展计划资助项目(No.023112311)。

摘　　要：假定由于隧道开挖在地表以下土层所形成的沉降槽的体积等于地层损失以及各土层沉降槽曲线仍可用正态分布函数表示。在此假定下,首次提出可以通过对隧道中心线以上土体的沉降值的分析,研究不同深度土层沉降槽曲线宽度系数,并且通过回归分析,提出用于计算不同深度土层沉降槽曲线宽度系数的公式,为计算隧道开挖引起的地表以下土体任一点的竖向沉降提供了一种有效方法,通过工程实例的计算证明了该方法的适用性。This paper assumes that the volume of the subsurface settlement troughs due to tunneling is equal to the ground loss and the shape of the troughs can still be represented by a Gaussian distribution. It is firstly presented by this paper that researchers can study the width parameters of the settlement troughs with different depths through analyzing the settlements above the center line of the tunnel, and then a regression equation used to calculate the width parameters of the settlement troughs with different depths can be derived; as a result, the settlement of every point above the tunnel due to tunneling can be attained. The applicability of this method has been demonstrated by the calculation of actual projects.

关 键 词：沉降槽地层损失 宽度系数 正态分布 

分 类 号：TU433[建筑科学—岩土工程]