桥梁软土深基坑预制锚杆复合桩围护结构施工技术探析

Analysis on Construction Technology of Prefabricated Anchor Rod Composite Pile Retaining Structure for Soft Soil Deep Foundation Pit of Bridges

当前的复合桩围护结构钢筋网铺设多为单层,围护范围受到限制,导致最大位移比增加,为此,文中对桥梁软土深基坑预制锚杆复合桩围护结构施工技术进行分析,采用压顶连梁实现围护结构设计。测试结果表明,对比5个测试槽段,最终得出的最大位移比被较好地控制在1.3以下,说明文中设计的围护技术控制效果更佳,围护的范围更大,误差可控,具有实际的应用价值。

The current composite pile enclosure structure is mostly laid with a single layer of steel mesh,which limits the scope of the enclosure and leads to an increase in the maximum displacement ratio.Therefore,this article proposes to analyze the construction technology of prefabricated anchor rod composite pile enclosure structure for bridge soft soil deep foundation pits,and use top pressing connecting beams to achieve the design of the enclosure structure.The test results show that the maximum displacement ratio obtained by comparing the 5 test slots is well controlled below 1.3.The enclosure technology designed in the explanation text has better control effect,a larger range of enclosure,controllable error,and practical application value.