基于TBM工法施工用堵漏浆液研制

Development of Sealing Slurry Based on Open-type TBM Construction Method

摘要:

开敞式TBM工法施工时，钻遇突涌水灾害后易造成严重的工程事故，堵漏浆液注浆止水处理措施是常用的技术手段。本文在分析了工程中常用浆液存在不足的基础上，结合室内试验，研制适用于开敞式TBM工法的堵漏浆液配方，并通过正交试验确定了优化配方为水灰比为0.59、酒石酸为0.25%、水解聚丙烯酰胺溶液为3%、铝酸钠为1.6%。在可控性（可泵期等）满足要求的基础上，对优化配方进行了包括析水性、抗压强度等各项性能的测试及室内模拟试验，经正交试验后测得配方浆液形成的结石体具有良好的抗压强度和抗渗能力，能够满足工程现场的需要。实际工程的涌水点注入研制的可控浆液后，短时间内达到停泵条件，相比传统浆液，可大幅减少堵漏浆液用量。结果表明，该可控配方浆液对吉林省内某隧道工程施工中钻遇的涌水灾害具有良好的治理效果，能够满足实际工程的需要。

关键词:TBM工法;涌水灾害;堵漏浆液;可控性

Abstract:

Sudden water inrush encountered during operation of the open-type TBM may lead to dangers, and then grouting of sealing slurries is often the main means to control the geological disaster. On the basis of analyzing the shortcomings of the existing slurries, the formula of the sealing slurry suitable for open TBM method was developed, and then was optimized by orthogonal tests. The final formula is as follows: water cement ratio 0.59, tartaric acid 0.25%, hydrolytic polyacrylamide solution 3% and sodium aluminate 1.6%. Under the condition that the controllability (pumping period, etc.) met the requirements, the properties of the optimized formula, including water precipitation, compressive strength were tested and the laboratory simulation test was also done. The stone developed from the orthogonal tested formula provided good compressive strength and impermeability, meeting the needs of the field. The pump can stop in a short time after injecting the controllable slurry at the inflow point. Compared with the traditional slurry, the amount of slurry used for plugging leakage can be greatly reduced. The results show that the controllable formula has a good control effect on the water inrush danger encountered in construction of tunnels in the province, and can meet the actual construction needs.

Key words:TBM; water inrush disaster; plugging slurry; controllability