基于理想弹性理论的地下连续墙解析解研究

Analytic Solution of Diaphragm Wall as Elasticity Assumption Employed

基于理想弹性理论,利用墙单元间的变位、转角、弯矩和剪力连续性条件,建立了地下连续墙在开挖过程中的解析方法。通过改变边界条件和连续性条件,可以模拟理想弹性介质中的无支撑开挖和盖挖逆作工法等施工过程。利用该算法,可以得到与2种施工方法对应的变位、转角、弯矩和剪力表达式。尽管同样源于有限元原理,但给出的方法在单元划分、荷载施加、连续性条件和边界条件的利用等方面与一般有限元法存在显著不同。

Based on the ideal elasticity assumption for ground, analytic solution for diaphragm wall is put forwarded with continuous conditions between two adjacent wall elements utilized including displacement, angular rotation, moment and shear. When boundary conditions updated in different excavation phase, construction procedure can be simulated for the two excavation methods. And then, equations of displacement, angular rotation, moment and shear for diaphragm wall in the two-construction procedure can be obtained. Even falling into the method of finite element in overall meaning, the proposed method is very different in the aspect of element partition, load application, utilization of continuity and boundary conditions.