深基坑支护新技术现状及展望

对深基坑支护中的复合土钉墙、新型地下连续墙、排桩支护（桩锚式、桩撑式、双排桩、“桩墙合一”）、逆作法、紧邻建筑物“零占位”基坑支护方法、人工冻结法、联合支护（土钉墙+桩锚、土钉墙+桩撑、土钉墙+地下连续墙等）进行了归纳总结；重点分析了新型地下连续墙，包括“两墙合一”地下连续墙、渠式切割深层搅拌水泥土地下连续墙（TRD）工法、双轮铣深层搅拌水泥土地下连续墙（CSM）工法、加筋水泥土地下连续墙（SMW）工法、钢管桩连续墙（WSP）工法、挖掘土再利用地下连续墙（CRM）工法、超薄型防水地下连续墙（TRUST）工法、预制地下连续墙、预应力钢管混凝土桁架围护桩墙；总结了现有深基坑支护新技术、新工艺、新方法的特点、适用范围、应用情况等，提出了在使用新技术、新工艺时应注意的问题，并对新型深基坑支护技术今后的发展趋势、研究方向进行分析和展望。研究结论可为深基坑支护技术的发展及工程设计施工提供指导和参考。

Present Situation and Prospect of New Technology for Deep Foundation Pit Support

The composite soil nailing wall, new underground continuous wall and row pile supporting (pile anchor, pile support, double row piles, “pile wall one”), reverse building method, “zero space” foundation pit supporting method adjacent to the buildings, freezing method, combined support (soil nailing wall + pile anchor, soil nailing wall + pile support, soil nailing wall + underground continuous wall, etc.) in deep foundation pit support were summarized and analyzed. The new underground continuous wall, including “two walls in one” underground continuous wall, trench cutting remixing deep (TRD) method, cutter soil mixing (CSM) method, soil mixing wall (SMW) method, wall made of steel piles (WSP) method, continuous wall using recycled mud (CRM) method, TRUST method, prefabricated underground diaphragm wall, and prestress steel tube concrete supporting structure supporting pile wall, were emphatically analyzed. The characteristics, application scopes and applications of new technologies, new processes and new methods for existing deep foundation pit supporting were summarized. The problems that should be paid attention to when using new technology and new technology were proposed, and the future development trend and research direction of new deep foundation pit supporting technology were analyzed and prospected. The conclusion can provide guidance and reference for the development of deep foundation pit supporting technology and engineering design and construction.