灌注桩和局部高压旋喷桩组合止水帷幕在顶管中的应用  

THE APPLICATION OF COMBINED WATER STOP CURTAIN OF CAST-IN-PLACE PILE AND LOCAL HIGH-PRESSURE ROTARY JET GROUTING PILE IN PIPE JACKING

作　　者：段玉三 Duan Yu-san

机构地区：[1]中铁市政环境建设有限公司,上海200331

出　　处：《建筑技术开发》2023年第8期135-137,共3页Building Technology Development

摘　　要：对于地质条件复杂且地下水丰富的深基坑工程必须加强地下水处理。基于此背景,以合肥市宿松路(南二环–深圳路)快速化改造工程锦绣大道DN2600过路管工程为例,在较分析多种止水帷幕方案的基础上,提出长螺旋灌注桩与三重管高压旋喷桩组合止水帷幕方案,并对具体的施工过程及控制要点展开分析探讨。结果表明,组合止水帷幕能有效发挥长螺旋灌注桩和高压旋喷桩的技术优势,再加上科学组织及对施工过程的严格控制,能显著提高基坑工程止水效果。For deep foundation pit engineering with complex geological conditions and rich groundwater,it is necessary to strengthen groundwater treatment.Based on this background,taking the DN2600 crossing pipe project of Jinxiu Avenue in the rapid transformation project of Susong Road(South 2nd Ring Road-Shenzhen Road)in Hefei as an example,on the basis of comparing and analyzing various water stop curtain schemes,the paper puts forward a combined water stop curtain scheme of long spiral grouting pile and triple pipe high-pressure rotary jet grouting pile,and analyzes and discusses the specific construction process and control points.The results show that the combined water stop curtain can effectively give full play to the technical advantages of the long spiral grouting pile and the high pressure jet grouting pile,and with scientific organization and strict control of the construction process,it can significantly improve the water stop effect of the foundation pit project.

关 键 词：灌注桩 高压旋喷桩 止水帷幕 顶管工作井 

分 类 号：TU753[建筑科学—建筑技术科学]