非水反应类高聚物注浆渗漏水处治工程实践

Practice of non-water-reacting polymer grouting treatment to seepage

针对施工及运行期地下工程存在的突涌水与渗漏灾害,结合非水反应类高聚物注浆材料特性与技术特点,提出突涌水的膜袋封闭反压注浆与渗漏的导管注浆处治方案。根据防渗封堵过程及其对渗水处的作用机制,揭示高聚物对于土体固结下反压封堵、扩散填充及其对围岩的胶结加固效应,应用于施工期隧道与TBM盾构突涌水,运行期水库溢洪道、隧道明洞、地铁站点和地下商业开发及地下通道工程渗漏水处治。结果表明,非水反应类高聚物注浆在解决地下工程高压渗漏水问题方面具有高效、快捷、效果好的特征,而且耐久性长,为渗漏水处治提供了新思路。

Aiming at the disasters of water burst or seepage during construction or operation of underground works and making full use of the properties of non-water-reacting polymer grouting material and its application technology, this study develops new treating methods： membrane-bag closure against pressure grouting in the water burst cases and tube grouting against seepage. We demonstrate the surrounding rock reinforcing effect of polymer grouting and its blocking, filling and diffusing effects in the condition of dynamic water pressure sealing, by using numerical analysis and the concepts of polymer rheological dynamics, fluid mechanics, material forming technology, and molecular mechanics, and by considering the procedure of seepage sealing and its long-term effects on surrounding rock. Our methods are applied to a variety of practical treatments against water burst and seepage： tunnels in construction, tunnel boring machine（TBM） shield tunneling, reservoir spillways in operation, open cut tunnels, subway stations, underground commercial development, and underground passage works. The results show that non-water-reacting polymer grouting is efficient, fast, and of long durability in solving the seepage problems of underground engineering, thus providing a new approach for seepage treating technology.