永久性边坡组合型支护结构的研究与应用

Research and Application of Permanent Combined Slope Support Structure

结合陕西省榆林市某工程主体围护外基坑支护结构,采用土钉加预应力锚索支护技术作为临时性支护,利用锚索在本阶段进行预张拉锁定并封锚,然后在主体结构外侧设置1道肋板式钢筋混凝土挡土墙,并与主体结构外墙设置变形缝,锚索在肋板式挡土墙上再次张拉锁定并封锚作为永久支护,该施工工艺取得了良好的社会效益和经济效益。

Combined with the foundation pit support structure outside the main enclosure of a project in Yulin City,Shaanxi Province,the soil nailing and prestressed anchor cable support technology is used as the temporary support.The anchor cable is pre-tensioned,locked and sealed in this stage,and then a ribbed reinforced concrete retaining wall is set outside the main structure,and a deformation joint is set with the outer wall of the main structure.The anchor cable is tensioned and locked again on the ribbed retaining wall and sealed as permanent support.The construction technology has achieved good social and economic benefits.