摘要
突水突泥是隧道富水断层地段施工常发生的地质灾害,注浆是灾害治理的重要技术方法。注浆工程隐蔽性强,控制浆液在加固区范围内有效扩散是灾害治理的关键。依托永莲隧道断层突水突泥治理实例,提出了注浆治理关键技术体系,包含整体、细部结合,精细化探测地质信息;采用引排泄压、注浆材料复合使用、注浆压力梯度控制和隐伏高压泥水腔体定域注浆等进行控制性注浆;综合应用注浆参数分析、检查孔分析、钻孔雷达探测技术和数值计算,全面地检查评估注浆效果。开挖和监测结果表明,注浆治理关键技术体系实现了隧道断层突水突泥的有效治理,有一定的工程参考借鉴意义。
Water and mud sudden inrush is a kind of geological disasters which often encounters during construction on tunnel in water-rich fault. Grouting is an important technical method for disaster management. Due to concealment of grouting project,the key of disaster treatment is controlling grout effective diffusion in reinforced area. With the example of disaster treatment at Yonglian tunnel,the key technology system of grouting treatment is put forward. The system contains meticulous geologic information detection relying on integration of entirety and detail. In addition,controlled grouting technology is proposed including drainage pressure,composite use of grouting material,gradient control of grouting pressure,localized grouting in slurry cavity with high pressure. Moreover,grouting effect is synthetically evaluated by use of checking hole analysis,borehole radar exploration and numerical calculation. Excavation and monitoring results show that the key technology system of grouting treatment can effectively govern water and mud sudden inrush in tunnel fault, which can provide certain engineering references.
引文
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