水泥基-玻璃纤维浆液在隧道注浆堵水工程中的应用
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摘要
针对水泥基-玻璃纤维浆液注浆堵水可行性问题,借助理论分析、数值模拟、工程试验相结合的技术手段,对水泥基-玻璃纤维浆液治理突水灾害进行了全面、深入的研究。研究水泥基-玻璃纤维浆液对调节裂隙发展的机理,以及浆液的掺入对岩体弹性模量、黏聚力和内摩擦角的影响;通过数值模拟方法,分析注浆效果,结合实际工程的涌水量监测和围岩变形监测,验证模拟的准确性。主要结论为:①玻璃纤维的存在使裂缝产生的应力发展得到减缓,并使尖端应力强度因子减弱;②对比分析隧道注浆前后的数值模拟结果,得到不同工况下围岩衬砌的竖向、水平位移值;③通过对比工程试验数据与模拟结果,证明了水泥基-玻璃纤维浆液实际应用的可行性。
The feasibility of treating water burst using cement-based fiber glass slurry is investigated via theoretical, numerical, and engineering approaches. The crack control mechanism as well as the influence of slurry on the elastic modulus, cohesion, and internal friction angle of rock are examined. Moreover, the validity of the numerical simulation is obtained according to monitoring results of water burst and surrounding rock deformation. Results evince that fiber glass attenuates the stress development of cracks and reduces the stress intensity factor at the tip of crack. In addition, the vertical and horizontal displacements of surrounding rock in different working conditions are acquired according to comparative analysis before and after grouting. Cement-based glass fiber slurry is manifested to be feasible through engineering test and data analysis of the simulation results.
The feasibility of treating water burst using cement-based fiber glass slurry is investigated via theoretical, numerical, and engineering approaches. The crack control mechanism as well as the influence of slurry on the elastic modulus, cohesion, and internal friction angle of rock are examined. Moreover, the validity of the numerical simulation is obtained according to monitoring results of water burst and surrounding rock deformation. Results evince that fiber glass attenuates the stress development of cracks and reduces the stress intensity factor at the tip of crack. In addition, the vertical and horizontal displacements of surrounding rock in different working conditions are acquired according to comparative analysis before and after grouting. Cement-based glass fiber slurry is manifested to be feasible through engineering test and data analysis of the simulation results.
引文
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[2] FARAMARZI L,RASTI A,ABTAHI S M.An Experimental Study of the Effect of Cement and Chemical Grouting on the Improvement of the Mechanical and Hydraulic Properties of Alluvial Formations[J].Construction and Building Materials,2016,126:32-43.
[3] WEBER W E,MECHTCHERINE V.Modeling the Dynamic Properties of Fibre-reinforced Concrete with Different Coating Technologies of Multifilament Yarns[J].Cement & Concrete Composites,2016,73:257-266.
[4] JO B W,CHAKRABORTY S,YUN S L.Hydration Study of the Polymer Modified Jute Fibre Reinforced Cement Paste Using Analytical Techniques[J].Construction and Building Materials,2015,101:166-173.
[5] 胡格格.高风险岩溶隧道注浆材料的研究与应用[D].武汉:武汉工程大学,2015.
[6] 胡格格,刘昌国,杨力,等.高风险岩溶隧道注浆材料的组成设计与室内试验[J].北方交通,2014 (3):110-111.
[7] 孙子正,李术才,刘人太,等.水泥基速凝浆液裂隙扩散机制与压力特性试验研究[J].岩土力学,2014(8):2219-2225.
[8] 刘健,刘人太,张霄,等.水泥浆液裂隙注浆扩散规律模型试验与数值模拟[J].岩石力学与工程学报,2012,31(12):2445-2452.
[9] 刘人太,李术才,张庆松,等.一种新型动水注浆材料的试验与应用研究[J].岩石力学与工程学报,2011,30(7):1454-1459.
[10] 豆海军.复合水泥基-水玻璃双液注浆材料性能及微观特性研究[D].北京:中国地质大学(北京),2014.
[11] 张欢.外加剂对水泥基注浆材料流变性能的调控作用[D].上海:华东理工大学,2014.
[12] 宋卫民.隧道二衬纤维混凝土防渗抗裂性能研究[D].长沙:中南大学,2013.
[13] 殷勇.玻璃纤维改善水泥土力学性能试验研究[D].南京:东南大学,2006.
[14] 吕雁.玻璃纤维混凝土弯曲疲劳性能及累积损伤研究 [D].昆明:昆明理工大学,2013.
[15] 郝哲,王贵来,刘斌.岩体注浆理论与应用[M],北京:地质出版社,2006.