<正>接触问题一直是近几十年来比较受关注的土木工程问题之一。针对国内外近期的接触面本构模型及接触面单元的研究现状，指出了目前接触面研究中存在的问题，同时对小刚度劲性水泥土墙基坑支护结构中型钢与水泥土接触面进行了分析，建议在用有限元分析该类问题时对不同材料应选用不同屈服准则进行计算。

The contact problems in engineering are very important. The current situation of constitutive models and elements in the contact surface was summarized. Current problems in contact surface research were pointed out. The contact surface between the shape steel and the soil-cement in foundation pit bracing by small rigidity stiff soil-cement wall was studied. It was suggested that the different yield rules should be adopted for different materials when the finite element method was used in contact surface problems.