济南地铁含岩溶裂隙水盾构区间注浆堵水控制技术

Grouting Technology of Water Stemming in Shield Zone of Jinan Metro Tunnel

摘要: 济南地铁R1号线穿越含灰岩复合地层中含有大量岩溶裂隙水，造成盾构掘进涌水量大，严重影响掘进效率和施工安全。对此，根据济南地铁隧道R1号线的工程地质和水文地质探测结果，获取R1号线中灰岩破裂体、溶洞、裂隙发育情况，从而分析了地下水储水条件及流动通道，预测突涌水灾害风险。针对济南地铁R1号线岩溶裂隙水分布特征，研究了一套盾构穿越溶洞裂隙水的安全控制技术，制定了防水、排水、堵水等技术措施。本文重点论述了在中风化石灰岩段注浆堵水方案、工艺及其效果检验。

Abstract: The limestone composite stratum in Jinan Metro Line R1 contains a large amount of karst fissure water, which causes a large amount of water intrusion in the shield tunneling and seriously affects the excavation efficiency and construction safety. The development of limestone burst bodies, caverns and fissures in the Jinan Metro Line R1 is collected from the engineering geology and hy-drogeological exploration results. Therefore, groundwater storage conditions and flow channels are obtained to predict the hazard risk of gushing water. According to the distribution characteristics of karst fissure water on the R1 line of Jinan Metro, a series of safety control techniques are adopted for shield tunnels through cracked caverns, including technical measures such as waterproofing, drainage and water plugging. This article mainly discusses the grouting water plugging scheme, technology and effect test in the limestone rocks.