高风险岩溶隧道注浆材料的研究与应用
发布时间：2018-09-07 13:46
【摘要】：高风险岩溶隧道是指岩溶十分发育、规模较大,溶洞中存在大量的淤泥或水,在施工和运行中存在巨大的涌水、突泥风险的隧道工程,如果处治不当,给隧道工程界带来的人身伤亡和经济损失极为惨重,轻则导致地面塌陷,耽误工期,淹没坑道、冲毁机具;重则造成人员伤亡,甚至导致整个工程报废,改线、生态环境恶化、居民被迫迁移等严重后果。目前,国内外在处理岩溶隧道突水、涌泥的病害时,通常采取注浆法,能较好的解决隧道突水、涌泥问题。其原理是在注浆时,浆液以注浆孔为圆心,以一定的扩散半径在四周形成一个注浆圈,能加固围岩,保证隧道在开挖时的稳定性,并起到一定的封堵涌水的作用。注浆过程主要是受到三个方面的控制:浆液性能、被注介质的特征、注浆参数。其中浆液性能是注浆过程三大要素之首,直接决定了隧道注浆工程的质量与成败。高风险岩溶隧道注浆材料对浆液性能要求:流动性好、水下抗分散性强、强度高,且凝结时间可调。现有的注浆材料用于防治高风险岩溶隧道突水(泥)都存在明显不足。本论文依托在建的湖北省保康至宜昌高速公路隧道建设工程开展研究。红岩寺隧道为湖北省保(康)宜(昌)高速襄阳段中长度最大和埋深最大的一座分离式隧道,左洞长6678m,右洞长6739m。红岩寺隧道是典型的越岭隧道。隧道硐身穿越二叠系~三叠系可溶岩约3200m,岩溶水与岩溶堆积体发育,易发生大型地质灾害。针对此,本课题拟研制适合防治高风险岩溶隧道突水(泥)灾害的注浆材料,用于保宜高速公路隧道工程建设。本论文在国内外相关研究的基础上,通过理论分析、实验室试验、现场试验与应用、反馈修正等环节,对高风险岩溶隧道注浆材料进行了系统而深入地研究,得到了一系列研究成果,主要包括:(1)提出了高风险岩溶隧道注浆材料研制的性能控制指标。当前市场上注浆材料品种繁多,本课题首先按注浆材料的成分、注浆施工工艺的要求和浆液的适用范围作了归纳与总结;其次,根据浆液的性能,对现有的隧道注浆材料作了简洁的归纳,针对隧道工程的实际需求,分析了市面上既有注浆材料的性能优缺点;最后,通过分析一般注浆工程注浆材料的性能指标要求的基础上,结合高风险岩溶隧道实际特殊工况,建立了高风险岩溶隧道注浆材料的性能要求与各项性能控制指标。(2)提出了研制高风险岩溶隧道注浆材料的组合设计方法。根据高风险岩溶隧道注浆材料的性能分析,考虑到浆液应具有良好的流动性、水下抗分散性、耐久性,强度要高,凝结时间可控可调,且安全、经济、环保。据此,提出了多种材料组合设计方案,为高风险岩溶隧道注浆材料的实验室研制提供理论支持与研制思路。(3)研制出了一种新型的高风险岩溶隧道注浆材料。试验首先筛选出了高效水下抗分散剂,确定了水下抗分散剂的最佳掺量范围,在确保浆液具有较好的水下抗分散性的基础上,通过大量有序的试验,对多种组合设计配置的浆液性能指标逐一进行检测,优选出了一组浆液工作性能优秀的材料组合设计,据此确定高风险岩溶隧道注浆材料的组成配方。此外,掌握了主要材料掺量对浆液的影响规律,分析了浆液的主要技术原理。最后,根据试验结果,推荐浆液的最佳组合配比。(4)完成了高风险岩溶隧道注浆材料的现场试验。介绍了注浆试验段的工程概况及隧道涌水情况,制定了注浆现场试验方案,阐述了隧道注浆的施工工艺过程和质量控制关键点,并对现场注浆试验进行总结,归纳了注浆施工的注意事项。现场试验表明,本项目研制的注浆材料工作性能良好,能有效防治隧道突水涌泥灾害与加固围岩,应用效果良好。本论文研制的新型高风险岩溶隧道注浆材料,其技术特点为:流动性好,水下抗分散性强,凝结时间可控可调,早期强度高,抗动水性能好,能有效防治隧道建设过程中突水涌泥等地质灾害,本研究成果经济、社会效益显著,可适用于公路、铁路隧道建设工程,并可用于过江隧道、海底隧道、地铁等地下建设工程,应用前景广阔,对提升隧道行业的建设水平、确保隧道施工安全顺利进行具有积极的促进作用。
[Abstract]:High-risk karst tunnel refers to the tunnel engineering which is very developed and large-scale karst cave contains a large amount of mud or water, and there is a huge risk of water gushing and mud bursting in the construction and operation. If improper treatment, it will bring heavy personal casualties and economic losses to the tunnel engineering circles, and eventually cause ground subsidence, delay the construction period and submerge. At present, the grouting method is usually adopted in dealing with the diseases of water inrush and mud inrush in karst tunnels at home and abroad, which can better solve the problems of water inrush and mud inrush in tunnels. The grouting process is mainly controlled by three aspects: the grouting performance, the characteristics of the injected medium and the grouting parameters. High-risk grouting materials for karst tunnels require good fluidity, strong underwater dispersion resistance, high strength, and adjustable setting time. Existing grouting materials are obviously inadequate in preventing and controlling water inrush (mud) in high-risk karst tunnels. The Hongyansi Tunnel is a separated tunnel with the longest length and the largest buried depth in Xiangyang section of Baokang-Yichang Expressway in Hubei Province. The left tunnel is 6678m long and the right tunnel is 6739m long. The Hongyansi Tunnel is a typical ridge-crossing tunnel. The karst water and karst accumulation are about 3200m, which are easy to occur large-scale geological disasters. In view of this, this paper intends to develop grouting materials suitable for the prevention and control of water inrush (mud) disasters in high-risk karst tunnels for the construction of Baoyi Expressway tunnels. A series of research results have been obtained, including: (1) The performance control index of grouting materials for high-risk karst tunnels has been put forward. There are many kinds of grouting materials on the market at present. The composition, the requirements of grouting construction technology and the applicable scope of grouting are summarized and summarized. Secondly, according to the properties of grouting, the existing grouting materials for tunnels are concisely summarized. According to the actual needs of tunnel engineering, the advantages and disadvantages of existing grouting materials on the market are analyzed. Finally, the grouting materials for general grouting engineering are analyzed. Based on the requirement of performance index and the actual special working condition of high-risk karst tunnel, the performance requirements and performance control indexes of high-risk karst tunnel grouting materials are established. (2) A combined design method for developing high-risk karst tunnel grouting materials is proposed. The grout should have good fluidity, anti-dispersion, durability, high strength, controllable setting time, safety, economy and environmental protection. Based on this, a variety of material combination design schemes are put forward, which provide theoretical support and development ideas for the laboratory development of high-risk grouting materials for Karst tunnels. (3) A new type of high-wind grouting materials is developed. The grouting materials for dangerous karst tunnels are screened out firstly, and the optimum dosage range of the underwater anti-dispersant is determined. On the basis of ensuring good underwater anti-dispersibility of the grout, through a large number of orderly tests, the grout performance indexes of various combinations of design configurations are tested one by one, and one is optimized. The composition of grouting materials for high-risk karst tunnels is determined according to the material combination design with excellent grouting performance. In addition, the influence law of the main material content on grouting is mastered, and the main technical principle of grouting is analyzed. Finally, according to the test results, the optimum grouting mixture ratio is recommended. (4) The high-risk karst tunnels are completed. The field test of grouting material is introduced. The general situation of the grouting test section and the water gushing situation of the tunnel are introduced. The grouting field test scheme is formulated. The key points of the construction process and quality control of the tunnel grouting are expounded. The field grouting test is summarized and the matters needing attention in the grouting construction are summarized. The grouting material has good working performance and can effectively prevent and control water inrush and mud inrush disaster and reinforce surrounding rock. The new high-risk grouting material for karst tunnel developed in this paper has the following technical characteristics: good fluidity, strong anti-dispersion under water, controllable setting time, high early strength, good anti-hydrodynamic performance, and can effectively prevent and control the tunnel. In the course of road construction, water gushing, mud gushing and other geological disasters, the research results are economic and social benefits are remarkable, which can be applied to highway and railway tunnel construction projects, and can also be used in river-crossing tunnels, submarine tunnels, subway and other underground construction projects. Extremely stimulative effect.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U454
[Abstract]:High-risk karst tunnel refers to the tunnel engineering which is very developed and large-scale karst cave contains a large amount of mud or water, and there is a huge risk of water gushing and mud bursting in the construction and operation. If improper treatment, it will bring heavy personal casualties and economic losses to the tunnel engineering circles, and eventually cause ground subsidence, delay the construction period and submerge. At present, the grouting method is usually adopted in dealing with the diseases of water inrush and mud inrush in karst tunnels at home and abroad, which can better solve the problems of water inrush and mud inrush in tunnels. The grouting process is mainly controlled by three aspects: the grouting performance, the characteristics of the injected medium and the grouting parameters. High-risk grouting materials for karst tunnels require good fluidity, strong underwater dispersion resistance, high strength, and adjustable setting time. Existing grouting materials are obviously inadequate in preventing and controlling water inrush (mud) in high-risk karst tunnels. The Hongyansi Tunnel is a separated tunnel with the longest length and the largest buried depth in Xiangyang section of Baokang-Yichang Expressway in Hubei Province. The left tunnel is 6678m long and the right tunnel is 6739m long. The Hongyansi Tunnel is a typical ridge-crossing tunnel. The karst water and karst accumulation are about 3200m, which are easy to occur large-scale geological disasters. In view of this, this paper intends to develop grouting materials suitable for the prevention and control of water inrush (mud) disasters in high-risk karst tunnels for the construction of Baoyi Expressway tunnels. A series of research results have been obtained, including: (1) The performance control index of grouting materials for high-risk karst tunnels has been put forward. There are many kinds of grouting materials on the market at present. The composition, the requirements of grouting construction technology and the applicable scope of grouting are summarized and summarized. Secondly, according to the properties of grouting, the existing grouting materials for tunnels are concisely summarized. According to the actual needs of tunnel engineering, the advantages and disadvantages of existing grouting materials on the market are analyzed. Finally, the grouting materials for general grouting engineering are analyzed. Based on the requirement of performance index and the actual special working condition of high-risk karst tunnel, the performance requirements and performance control indexes of high-risk karst tunnel grouting materials are established. (2) A combined design method for developing high-risk karst tunnel grouting materials is proposed. The grout should have good fluidity, anti-dispersion, durability, high strength, controllable setting time, safety, economy and environmental protection. Based on this, a variety of material combination design schemes are put forward, which provide theoretical support and development ideas for the laboratory development of high-risk grouting materials for Karst tunnels. (3) A new type of high-wind grouting materials is developed. The grouting materials for dangerous karst tunnels are screened out firstly, and the optimum dosage range of the underwater anti-dispersant is determined. On the basis of ensuring good underwater anti-dispersibility of the grout, through a large number of orderly tests, the grout performance indexes of various combinations of design configurations are tested one by one, and one is optimized. The composition of grouting materials for high-risk karst tunnels is determined according to the material combination design with excellent grouting performance. In addition, the influence law of the main material content on grouting is mastered, and the main technical principle of grouting is analyzed. Finally, according to the test results, the optimum grouting mixture ratio is recommended. (4) The high-risk karst tunnels are completed. The field test of grouting material is introduced. The general situation of the grouting test section and the water gushing situation of the tunnel are introduced. The grouting field test scheme is formulated. The key points of the construction process and quality control of the tunnel grouting are expounded. The field grouting test is summarized and the matters needing attention in the grouting construction are summarized. The grouting material has good working performance and can effectively prevent and control water inrush and mud inrush disaster and reinforce surrounding rock. The new high-risk grouting material for karst tunnel developed in this paper has the following technical characteristics: good fluidity, strong anti-dispersion under water, controllable setting time, high early strength, good anti-hydrodynamic performance, and can effectively prevent and control the tunnel. In the course of road construction, water gushing, mud gushing and other geological disasters, the research results are economic and social benefits are remarkable, which can be applied to highway and railway tunnel construction projects, and can also be used in river-crossing tunnels, submarine tunnels, subway and other underground construction projects. Extremely stimulative effect.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U454
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