复杂环境中深基坑综合支护设计与施工技术

Design of Comprehensive Supporting for Deep Foundation Pit in Complex Environment and the Construction Technology

摘要:

以广西柳州一处于复杂环境中的深基坑综合支护为对象，结合工程地质条件及勘察试验，提出了“注浆微型钢管桩 注浆微型树根桩 挂网喷砼 锚杆 预应力锚索”及“钢筋混凝土排桩 旋喷桩 挂网喷砼”2种综合支护方案进行支护，并阐述了方案的设计参数选取和施工工艺要求。实践表明，支护方案具有较好的适用性和安全性，可为类似基坑工程的设计和施工提供参考。

Abstract:

Taking a deep foundation pit supporting engineering in complex environment as an object, combined with engineering geological conditions and exploration test, comprehensive support schemes of “grouting micro steel pipe pile grouting micro root pile hanging net shotcrete anchor bar pre-stressed anchor cable” and “reinforced concrete row pile jet grouting pile hanging net shotcrete” are put forward, and the selection of design parameters and the construction technology are also described. The practice shows that the support scheme has good applicability and safety, which can provide reference for the design and construction of similar foundation pit engineering.