关键词: 顶管, 土体变形, 复合式后背墙, 反力分布, 平面应变, 结构分析

Abstract: The thrust wall is a very important component of rectangular shaft; its stress and strain are both fairly complex when it suffered the thrust of pipe jacking. How to make certain the thrust force, which is transmitted from internal lining of working shaft to external soil mass, is quite significant; how much will the soil pre-deformation affect, and these results directly affect the calculation accuracy of retaining structure and internal lining of working shaft. By using numerical modeling analysis method, the thrust force transmission pattern is found; and the reaction distribution in the depth and width direction of the thrust wall is calculated; then the internal forces of each components of the thrust wall are ascertained on the basis of known reaction distribution analysis. This paper offers references for calculating pipe jacking thrust wall according to rational simplification and approximate hypothesis.

Key words: pipe jacking, soil deformation, composite thrust wall, reaction distribution, plane strain, structural analysis