强风化岩质边坡滑坡治理及有限元分析
|
摘要
采用浅层压力灌浆法加固边坡,可以减少边坡的开挖和由此而带来的对环境的破坏;边坡经过灌浆法治理后,坡面无需进行传统的浆砌片石等防护,可保留原始坡表,从而易于进行生态建设和恢复。详细阐述采用压力灌浆法治理强风化岩质边坡滑坡的典型工程实例和加固效果的检测结果。借助弹塑性有限元分析方法,对比灌浆加固前后边坡岩土体的受力情况,由分析结果可知,压力灌浆后表层岩土体的物理力学性质得到改善,阻止边坡滑动机制的初期形成与发展,从而提高边坡的稳定性。
With the rapid development of economy in the western regions in China,many high grade highway construction projects have been carried out.The construction work was often interrupted by the failure of the highly weathered rock slope.Therefore,it is very important to find out effective methods to ensure the stability of these kinds of slopes.Applying grouting method to strengthen slope stability can greatly reduce excavation and prevent the natural environment from being seriously destroyed.Since the natural slope surface can be reserved with this method,it is not necessary to construct conventional carved rock-slice on the slope and it is easy to take measurements to recover and develop the ecological environment.A typical slope reinforced with the grouting method has been accomplished successfully and is depicted in detail in this paper.The layout,design and monitoring data for the project are given.Based on the practical experience,an elastoplastic finite element program is applied to study the soil behavior before and after grouting.The mechanism of slope reinforcement is discussed based on the finite element analysis.The results show that,after grouting,the physico-mechanical properties of the soil are greatly improved.In this way,the stability of such kinds of slopes can be improved.
With the rapid development of economy in the western regions in China,many high grade highway construction projects have been carried out.The construction work was often interrupted by the failure of the highly weathered rock slope.Therefore,it is very important to find out effective methods to ensure the stability of these kinds of slopes.Applying grouting method to strengthen slope stability can greatly reduce excavation and prevent the natural environment from being seriously destroyed.Since the natural slope surface can be reserved with this method,it is not necessary to construct conventional carved rock-slice on the slope and it is easy to take measurements to recover and develop the ecological environment.A typical slope reinforced with the grouting method has been accomplished successfully and is depicted in detail in this paper.The layout,design and monitoring data for the project are given.Based on the practical experience,an elastoplastic finite element program is applied to study the soil behavior before and after grouting.The mechanism of slope reinforcement is discussed based on the finite element analysis.The results show that,after grouting,the physico-mechanical properties of the soil are greatly improved.In this way,the stability of such kinds of slopes can be improved.
引文
[1]王德群,黎映宁.压力注浆技术在高速公路路基病害处理中的应用[J].天津建设科技,2002,12(3):4-6.(Wang Dequn,Li Yingning.Application of the pressure grouting technique in dealing with highway subgrade disease[J].Tianjin Architecture Science and Technology,2002,12(3):4-6.(in Chinese))
[2]刘润,闫澍旺,罗强,等.纤维砂浆增强预应力锚索锚固效果的研究[J].岩土工程学报,2005,27(2):214-218.(Liu Run,Yan Shuwang,Luo Qiang,et al.Research on reinforced anchor with fibre mortar[J].Chinese Journal of Geotechnical Engineering,2005,27(2):214-218.(in Chinese))
[3]王刚,陈金海,王明星.用压密注浆法加固高速公路高填方路段路基(堤)[J].公路交通科技,2002,19(2):51-52.(Wang Gang,Chen Jinhai,Wang Mingxing.Apply pressure grouting technique in highway high filled embankment[J].Journal of Highway and Transportation Research and Development,2002,19(2):51-52.(in Chinese))
[4]边国强,李艳,李鲁泉.高速公路路堑边坡软弱夹层高压注浆加固的理论与实践[J].勘察科学技术,1999,(6):36-41.(Bian Guoqiang,Li Yan,Li Luquan.Theory and practice of high pressure grouting solidification of soft intercalation of the freeway cut slope[J].Site Investigation Science and Technology,1999,(6):36-41.(in Chinese))
[5]程良奎,张作睸,杨志银.岩土加固实用技术[M].北京:地震出版社,1994.1-275.(Cheng Liangkui,Zhang Zuomei,Yang Zhiyin.Ground Anchorages Technique[M].Beijing:Earthquake Press,1994.1-275.(in Chinese))
[6]张学言,闫澍旺.岩土塑性力学基础[M].天津:天津大学出版社,2004.(Zhang Xueyan,Yan Shuwang.Fundamentals of Geotechnics Plasticity[M].Tianjin:Tianjin University Press,2004.(in Chinese))
[7]李宁,张平,闫建文.灌浆的数值仿真分析模型探讨[J].岩石力学与工程学报,2002,21(3):326-330.(Li Ning,Zhang Ping,Yan Jianwen.Numerical modeling of grouting in geoengineering[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(3):326-330.(in Chinese))
[8]叶林宏,何泳生,冼安如,等.论化灌浆液与被灌岩土的相互作用[J].岩土工程学报,1994,16(6):47-55.(Ye Linhong,He Yongsheng,Xian Anru,et al.Interactions between chemical grouting and grouted medium[J].Chinese Journal of Geotechnical Engineering,1994,16(6):47-55.(in Chinese))
[9]周维垣.岩体力学数值计算方法的现状与展望[J].岩石力学与工程学报,1993,12(1):84-88.(Zhou Weiyuan.Present status and development of geomechanics numerical analysis method[J].Chinese Journal of Rock Mechanics and Engineering,1993,12(1):84-88.(in Chinese))
[10]El-Kelesh A M,Matsui T.Effect of soil and grouting parameters on the effectiveness of compaction grouting[A].In:Proceedings of the Third International Conference:Grouting and Ground Treatment[C].New Orleans,LA,USA:American Society of Civil Engineers,2003.1 056-1 070.
[2]刘润,闫澍旺,罗强,等.纤维砂浆增强预应力锚索锚固效果的研究[J].岩土工程学报,2005,27(2):214-218.(Liu Run,Yan Shuwang,Luo Qiang,et al.Research on reinforced anchor with fibre mortar[J].Chinese Journal of Geotechnical Engineering,2005,27(2):214-218.(in Chinese))
[3]王刚,陈金海,王明星.用压密注浆法加固高速公路高填方路段路基(堤)[J].公路交通科技,2002,19(2):51-52.(Wang Gang,Chen Jinhai,Wang Mingxing.Apply pressure grouting technique in highway high filled embankment[J].Journal of Highway and Transportation Research and Development,2002,19(2):51-52.(in Chinese))
[4]边国强,李艳,李鲁泉.高速公路路堑边坡软弱夹层高压注浆加固的理论与实践[J].勘察科学技术,1999,(6):36-41.(Bian Guoqiang,Li Yan,Li Luquan.Theory and practice of high pressure grouting solidification of soft intercalation of the freeway cut slope[J].Site Investigation Science and Technology,1999,(6):36-41.(in Chinese))
[5]程良奎,张作睸,杨志银.岩土加固实用技术[M].北京:地震出版社,1994.1-275.(Cheng Liangkui,Zhang Zuomei,Yang Zhiyin.Ground Anchorages Technique[M].Beijing:Earthquake Press,1994.1-275.(in Chinese))
[6]张学言,闫澍旺.岩土塑性力学基础[M].天津:天津大学出版社,2004.(Zhang Xueyan,Yan Shuwang.Fundamentals of Geotechnics Plasticity[M].Tianjin:Tianjin University Press,2004.(in Chinese))
[7]李宁,张平,闫建文.灌浆的数值仿真分析模型探讨[J].岩石力学与工程学报,2002,21(3):326-330.(Li Ning,Zhang Ping,Yan Jianwen.Numerical modeling of grouting in geoengineering[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(3):326-330.(in Chinese))
[8]叶林宏,何泳生,冼安如,等.论化灌浆液与被灌岩土的相互作用[J].岩土工程学报,1994,16(6):47-55.(Ye Linhong,He Yongsheng,Xian Anru,et al.Interactions between chemical grouting and grouted medium[J].Chinese Journal of Geotechnical Engineering,1994,16(6):47-55.(in Chinese))
[9]周维垣.岩体力学数值计算方法的现状与展望[J].岩石力学与工程学报,1993,12(1):84-88.(Zhou Weiyuan.Present status and development of geomechanics numerical analysis method[J].Chinese Journal of Rock Mechanics and Engineering,1993,12(1):84-88.(in Chinese))
[10]El-Kelesh A M,Matsui T.Effect of soil and grouting parameters on the effectiveness of compaction grouting[A].In:Proceedings of the Third International Conference:Grouting and Ground Treatment[C].New Orleans,LA,USA:American Society of Civil Engineers,2003.1 056-1 070.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心