“吊脚桩”桩锚支护在土岩组合地层 深基坑工程中的应用研究

以济南黄金国际广场项目深基坑工程为例，针对土岩组合地层的特点，采用“吊脚桩”桩锚支护及两桩一锚布设方式的设计方案。对基坑设计、锚索试验、基坑监测等内容进行介绍，现场进行了锚索验收试验，试验结果符合设计要求。监测结果表明，基坑支护结构变形、周边建筑物沉降等均处于安全状态，远小于报警值，说明“吊脚桩”桩锚支护在土岩组合地层深基坑工程中的应用效果非常好，同时大大节省了造价，短缩了工期。本文的相关设计方法、试验、监测成果可为类似工程提供借鉴。

Suspended piles and anchor cables used in support of deep soil rock foundation pit

Take the deep foundation pit project of Jinan Gold International Plaza as an example, in view of the characteristics of soil rock combination formation, the support design with suspended piles and anchor cables in the layout of two piles plus one anchor was adopted. The design of the foundation pit, test of anchor cables and monitoring of the foundation pit are introduced. The acceptance test of anchor cables was carried out on site, and the test results meet the design requirements. The monitoring results show that the deformation of the supporting structure of the foundation pit and the settlement of the surrounding buildings are all in a safe state, which is far less than the alarm value, indicating that the application of the suspended piles and anchor support in the deep foundation pit in the soil rock composite stratum is very good with less costs and short construction period. The relevant design methods, experiments and monitoring results can provide reference for similar projects.