施工技术 2016年3月下 122 CONSTRUCTION TECHNOLOGY 第45卷第6期 D0I:10.7672/sgjs2016060122 钢花管分段注浆工艺试验与检测* 谭文勇 (中铁建设集团有限公司，北京100040) [摘要]注浆钢花管在基坑工程中的应用已经较为常见，可以作为防水措施或与其他结构形成复合支护体系以承 担侧向荷载.全段二次间隔时间注浆是较为常用的工艺，该工艺在复杂地层条件下的适用性不强，常出现浆液在 全段范围内无法均匀扩散的情况.鉴于该情况，开发了钢花管分段注浆结构，在碎石土地层进行了全段注浆和分 段注浆的工艺对比试验.由于碎石地层孔隙通道发育，采用全段二次注浆工艺必须采取“多次少注”，确保足够间 隔时间的注浆方式才能确保注浆达到标准.而开发的分段注浆工艺能确保总注浆量，基本达到设计标准.工艺性 试验前后的勘察检验验证了分段注浆工艺的注浆效果，注浆显著降低了渗透系数.试验后的水平承载力试验与反 算验证了分段注浆工艺能够显著提高地基水平基床系数. [关键词]注浆工艺；钢花管；分段注浆；现场试验 [中图分类号]TU471*.8 [文献标识码]A [文章编号]1002-8498(2016)06-0122-07 Tests and Detection of Multi-section Grouting Technique of Steel Grouting Pipes Tan Wenyong (China Railway Construction Group Co. Led.Beijing 100040 China) Abstract:Steel grouting pipe was widely used in foundation excavation engineering.It can be used as anti-seepage structure assembled with other structures to afford lateral load as a posite supporting system.The full-section pipe grouting with time interval is a mon technique.However the grout can hardly diffuse uniformly along the whole pipe and is not applicable in plex stratums.A multi-section grouting structure system was developed and full-section grouting and multi-section grouting parison tests were carried out in the gravelly soil stratums.The pore channels in the gravelly soil were strongly developed.If the full-section grouting is applied we should inject grout more times and less grout each time so as to reach the design requirements.When the newly developed multi-section grouting wa...
钢花管分段注浆工艺试验与检测.pdf
