Abstract：Research purposes：The material properties of drain well are so different than those of surrounding soil, so the contact interface elements are needed in the simulation of smear layer. But most contact interface elements only can reflect the stress-strain property and can not reflect the penetrable property. In order to consider the settlement difference between drain well and soft soil as well as the penetrability of contact interface elements, a new kind coupled contact interface element is developed to simulate smear layer.
Research conclusions：Based on considering the effect of smear layer, 16-node constant thickness contact interface elements coupled with 8-node isometric elements are used to simulate the smear layer of drain wells. A relevant finite-element program is made to analyze two practical examples. The result is verified reasonable shows that the coupled element model is effective and can be used in numerical analysis for construction.
周 刚，罗照新，李安洪. 一种三维耦合单元模型在涂抹层模拟中的应用[J]. 铁道工程学报, 2009, 26(4): 52-56.
ZHOU Gang,LUO Zhao-xin,LI An-hong. Application of One 3D Coupled Element Model in Smiulation of Smear Layer. 铁道工程学报, 2009, 26(4): 52-56.
2009, Vol. 26 
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