（河南大学材料与结构研究所  开封  475001）
［提要］  为了探讨加劲水泥土地下连续墙的工作机理，对型钢水泥土复合结构进行抗弯试验。对试件的强度、刚度和裂缝试验结果分析发现，水泥土对复合结构的强度和刚度具有一定的贡献，但在一般情况下这种贡献很小，在工程中可以忽略不计。试验中还发现，水泥土对复合结构承载能力最重要的贡献是约束型钢的侧移，提高了型钢的整体稳定性，使型钢的强度和刚度得到较大的发挥。在工程中，水泥土应具有足够的强度，并采取一定的措施，以保证型钢的稳定性，使其强度和刚度得到充分的发挥。
［关键词］  加劲水泥土  地下连续墙  强度  刚度  稳定性
Model Test Study on Reinforced Soilcementing Timbering Structure/Kong Dezhi（Institute of Material and Structure, Henan University，Kaifeng  475001，China）
Abstract:In order to analyze the working mechanism of reinforced soilcement mixing wall, the test on complex structure of shaped steel and cement soil has been done. Through the analysis of intensity, rigidity and cracks of test samples, it is found that soilcement has contribution to the complex structure, but the contribution is very little and can be ignored under normal condition. It is also found that the most important contribution of soilcement to complex structure was limiting the side movement and improved integer stability of shaped steel, so the intensity and rigidity of shaped steel increase. It is pointed out that the intensity of soilcement must be enough in the engineering, and some measurements should be taken to keep the shaped steel in steady.
Keywords:reinforced soilcement mixing wall; intensity; rigidity; stability