扶壁挡土墙卸荷板设计研究

针对扶壁式挡土墙及带卸荷板挡土墙的受力情况进行了分析,通过实例验证,设置卸荷板可以增大挡土墙抗滑稳定系数的安全储备,从而使墙的断面尺寸具有进一步优化的余地;并从安全性和经济性角度考虑,得到了适合的卸荷板尺寸及位置优化方案.对比优化方案与原方案可知,优化方案具有减小基底开挖面、节省工程量、节约工程造价的优点,适用于地下水丰富地区的地基开挖或墙后建筑物有限制开挖要求的地基.

Optimization Design of Unloading-board Attach to Buttresses Retaining Wall

This paper analyzed the force conditions of buttresses and unloading-board retaining walls. It was verified that setting unloading-board could increase the safety margin of stability against sliding of retaining wall. From the perspective of safety and economy,it proposed optimization scheme for sizes and locations of unloading board.By contrasting optimization scheme with the original one,it showed that the optimization scheme had the advantages of reducing the basement excavation face and saving engineering and construction costs. It could be used especially for foundation excavation in regions with rich groundwater or excavation limited by the buildings behind the retaining wall.