新型帷幕复合注浆法在桩端持力层加固中的应用  

Application of Bearing Layer Reinforcement around Pile Tip by New Composite Curtain Grouting Technique

作　　者：吕文龙[1] 刘恋[1] 

机构地区：[1]广东省建筑科学研究院集团股份有限公司,广东广州510500

出　　处：《岩土工程技术》2015年第2期95-99,共5页Geotechnical Engineering Technique

基　　金：广东省科学技术厅科研攻关项目(编号:2006B37202009);广东省建筑科学研究院青年创新基金(编号:100150076)

摘　　要：提出了可用于解决砂砾填充的岩溶区域、风化花岗岩区域及砂砾区域桩基的持力层缺陷问题的新型帷幕复合注浆法。该方法解决了复合注浆施工中高压喷射流直接切割周边岩土体,进而影响桩基承载力的问题。通过对其原理、施工工艺及参数的阐述以及工程实例应用及加固后检测,验证了该方法的正确性及有效性,为类似工程提供参考。This paper Proposed a new composite curtain grouting technique, which solved the bearing layer defection problem of pile in the gravel filling karst area, weathering granite region and gravel zone. This technique prevented high pres- sure jet flow of composite grouting cutting the soil around the pile directly. Thus the bearing capacity of pile foundation could he guaranteed. Basing on the principle, the construction technology, described parameters of the new composite curtain grou- ting and the correctness of this method was verified. The new curtain composite grouting technique provided a reference for similar projects.

关 键 词：新型帷幕复合注浆法 桩基加固 桩端持力层 注浆 

分 类 号：TU472.6[建筑科学—结构工程]