静动力荷载下土石坝高聚物防渗墙受力特性分析

土石坝高聚物防渗墙与塑性混凝土及普通混凝土防渗墙相比，具有轻质﹑早强﹑环保﹑耐久等特点；施工中具有快速﹑经济﹑实用和对坝体影响干扰小等特点，现已在实际工程中得到了成功应用。但目前对于高聚物材料防渗墙成墙后的静动力特性缺乏计算分析研究。选择Duncan-Chang E-B非线性模型作为坝体模型，在防渗墙与坝体间设置面–面接触单元，建立有限元数值仿真模型。采用实际算例，对比分析了高聚物防渗墙与塑性混凝土、普通混凝土防渗墙在静力与地震荷载下的应力分布及破坏特性的差异，说明在同种工况下高聚物防渗墙应力最小，不易发生破坏，具有较好的安全性。

Stress analysis of polymer diaphragm wall for earth-rock dams under static and dynamic loads

Compared with plastic concrete and normal concrete,the polymer diaphragm wall has the characteristics of light weight,early strength,environmental conservation and durability.During its construction,it has speedy,economic,and practical characteristics and few influences on the dam.The polymer diaphragm wall has been successfully used in earth-rock dams.But at present the static and dynamic characteristics of earth-rock dams are seldom studied.The Duncan-Chang E-B nonlinear model is used and the contact element is set up between the diaphragm wall and the dam for the FEM model.A comparison of stresses on the diaphragm wall among polymer,plastic concrete and normal concrete under static and seismic loads shows that the stress on the polymer diaphragm wall is the least and it is not easy to be failed.The polymer diaphragm wall for earth-rock dams has preferable security.