TSS注浆技术在天津地铁工程中的应用

研究目的:在天津地铁进行暗挖法施工时,由于降水对周边环境影响比较大,不宜降水,所以注浆堵水是一个主要辅助工法。在地层中必须进行分段注浆可以保证注浆效果,为了解决分段注浆中的成孔难、钻机机械体积较大、PVC塑料注浆管易受压变形、价格较高等缺点,所以研究TSS注浆技术是十分必要的。研究方法:通过对TSS型注浆管及其配套系统的研制,以及注浆参数的选择和工艺流程、注浆工艺的控制,结合天津地铁营口道车站1号风机房暗挖隧道施工中的应用进行研究。研究结果:成功地解决了单向袖阀式小口径注浆管工艺(TSS注浆工艺)。研究结论:TSS具有分段、可控、操作简便的特点,这样地层加固均匀,止水效果好,TSS注浆技术在天津地铁中的应用,大大地提高了工程进度,降低了造价。

Application of TSS Grouting Technology in Tianjin Metro

Research purposes:Due to the great adverse impact on the surrounding environment,it is not suitable to adopt dewatering in the construction of the mined tunnels of Tianjin Metro.Therefore,grouting is one of the major assisting construction methods adopted in Tianjin Metro.However,step-by-step grouting must be adopted so as to ensure the quality of the grouting construction.In order to overcome such disadvantages as difficult grouting hole drilling,large size of the drilling machines,easy deformation of the PVC grouting ducts and high cost of step-by-step grouting,Therefore the studies of TSS grouting technology is extremely essential.Research methods:TSS grouting ducts and accompanying equipment are developed and proper grouting parameters,grouting process and grouting techniques are determined.Research is carried on by means of application of TSS grouting technology in the construction of the mined tunnel of No.1 ventilation room of Yingkoudao station of Tianjin Metro.Research results:The techniques of single-direction sleeve-valve grouting ducts of small diameter are mastered.Research conclusions:Due to such advantages as step-by-step and controllable grouting and simple operation of TSS ducts,uniform ground consolidations and excellent water sealing effects are achieved,application of TSS grouting technology in Tianjin Metro results in higher construction progress and reduced construction cost.