水泥土抗滑墙加固软基边坡模型试验研究

Model experiment researches on soft foundation slope reinforced by cement-soil anti-sliding walls

软土地基边坡由于土的软弱性和结构的特殊性,施工加固很难取得理想效果,水泥土抗滑墙是一种处理方式,但目前关于水泥土抗滑墙加固结构的墙间土压力、墙侧土拱效应、抗滑墙受力情况的研究不够充分。为了深入探索加固机理,依托模型装置,进行加载破坏试验。试验表明,水泥土抗滑墙加固软土地基边坡,抗滑墙与软硬土层相互作用,加固效果明显。随着推力荷载的增大,抗滑墙分担了较大的水平推力并有效地传递至了硬土层,且分担比随荷载增大而增大。水泥土抗滑墙的应变随深度增加而减小,受墙间距影响,墙顶部应变变化最大,底部最小。在采用水泥土抗滑墙加固地基边坡时,应做好墙间距设计。

Because of the soft soil and the special structure of soft foundation slope,it is difficult to achieve the ideal effect of construction reinforcement.The cement-soil anti-sliding wall is a kind of treatment method.However,the researches on the soil pressure,the soil arch effect and the stress condition of this structure are not enough.In order to explore the reinforcement mechanism,the loading failure test was carried out on the basis of model equipment.The test shows that the reinforcement effect of anti-sliding walls is obvious because of the interaction between the soils and walls.With the increase of thrust load,the walls share a large part of horizontal thrust and the thrust is effectively transmitted to the hard soil layer.The share ratio of hard soil layer increases with the increase of load.The strain of cement-soil anti-sliding wall decreases with the increase of depth,and the strain change at the top of wall is the biggest,while the bottom is the smallest.When using this wall structure,the design of wall spacing should be done well.