深层高压注浆加固古滑坡滑动带试验及效果分析
|
摘要
通过深层高压注浆法加固混碎石黏土古滑坡滑动带的成功工程实例,结合各种检测手段及有限元弹塑性分析,阐述对混碎石黏土古滑坡滑带土实施深层高压注浆加固的机制;测试和分析了滑动带压力注浆前后物理力学参数的变化特征;计算了注浆前后滑坡的剩余下滑力及安全系数。电镜观测表明,水泥浆液对于滑动带岩土体的充填置换率可达到5%～10%;土工试验结果显示,滑动带土体黏聚力由20.20 kPa提高到39.54 kPa,内摩擦角由16°升高到21.30°;声波CT扫描试验表明,滑动带土体的声波波速增长约为31%。有限元弹塑性分析计算表明,滑坡由注浆前的不稳定状态变为注浆后的基本稳定状态,边坡剩余下滑力大幅减小,为支挡结构设计提供了优化依据。试验及计算分析结果表明,高压注浆法用于加固滑动带岩土体是可行的,经注浆加固后的滑动带岩土体的力学性能得到了明显改善,边坡安全性得到了提高。
Based on successful reinforcement projects of the sliding zone of the ancient debris landslide with applying deep high pressure grouting method,and combined with various detection measures and elastoplastic finite element analysis,the mechanism of deep high pressure grouting to reinforce sliding zone,physico-mechanical parameters of the soil in sliding zone before and after grouting,the remnant sliding force and safety factors of the landslide have been studied.Electron microscopy experiments show that,The filling replacement rate of cement slurry to rock and soil in sliding zone is 5%～10%.The soil tests results indicate that the soil cohesion increase from 20.20 kPa to 39.54 kPa and its internal friction angle from 16° to 21.30°.The sound wave CT scanning experiments show that the sound wave velocity of the soil in the sliding zone increases about 31%.The finite element analysis show that pressure grouting could make the unstable landslide go into the basic stable state and the remnant sliding force reduces a lot.These can provide optimization basis for retaining structure design.Tests and calculation results show that high pressure grouting method for enhancing the rock and soil in sliding zone is feasibility.The mechanical performance of the rock and soil in sliding zone has been significantly improved and the safety of the slope has been enhanced.
Based on successful reinforcement projects of the sliding zone of the ancient debris landslide with applying deep high pressure grouting method,and combined with various detection measures and elastoplastic finite element analysis,the mechanism of deep high pressure grouting to reinforce sliding zone,physico-mechanical parameters of the soil in sliding zone before and after grouting,the remnant sliding force and safety factors of the landslide have been studied.Electron microscopy experiments show that,The filling replacement rate of cement slurry to rock and soil in sliding zone is 5%～10%.The soil tests results indicate that the soil cohesion increase from 20.20 kPa to 39.54 kPa and its internal friction angle from 16° to 21.30°.The sound wave CT scanning experiments show that the sound wave velocity of the soil in the sliding zone increases about 31%.The finite element analysis show that pressure grouting could make the unstable landslide go into the basic stable state and the remnant sliding force reduces a lot.These can provide optimization basis for retaining structure design.Tests and calculation results show that high pressure grouting method for enhancing the rock and soil in sliding zone is feasibility.The mechanical performance of the rock and soil in sliding zone has been significantly improved and the safety of the slope has been enhanced.
引文
[1]程良奎,张作眉,杨志银.岩土加固实用技术[M].北京:地震出版社,1994.
[2]王刚,陈金海,王明星.用加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 Jin-hai,WANG Ming-xing.Applypressure grouting technique in highway high filledembankment[J].Journal of Highway andTransportation Research and Development,2002,19(2):51-52.
[3]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 Guo-qiang,LI Yan,LI Lu-quan.Theory andpractice of high pressure grouting solidification of softintercalation of the freeway cut slope[J].GeotechnicalInvestigation Surveying,1999,(6):36-41.
[4]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 Lin-hong,HE Yong-sheng,XIAN An-ru,et al.Interactions between chemical grouting and groutedmedium[J].Chinese Journal of Geotechnical Engineering,1994,16(6):47-55.
[5]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 De-qun,LI Ying-ning.Application of the pressuregrouting technique in dealing with highway subgradedisease[J].Tianjin Architecture Science andTechnology,2002,12(3):4-6.
[6]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 Jian-wen.Numericalmodeling of grouting in geoengineering[J].ChineseJournal of Rock Mechanics and Engineering,2002,21(3):326-330.
[7]朱宝龙,胡厚田,张玉芳,等.钢管压力注浆型抗滑挡墙在京珠高速公路K108滑坡治理中的应用[J].岩石力学与工程学报,2006,52(2):399-406.ZHU Bao-long,HU Hou-tian,ZHANG Yu-fang,et al.Application of steel-tube bored grouting anti-slidingretaining wall to treatment of landslide k108 inBeijing-Zhuhai expressway[J].Chinese Journal of RockMechanics end Engineering,2006,52(2):399-406.
[8]张玉芳.京珠高速公路108滑坡及防治工程分析[J].西南交通大学学报,2003,38(6):633-637.ZHANG Yu-fang.Analyses of No.108 landslide inBeijing-Zhuhai Highway and its treatment measures[J].Journal of Southwest Jiaotong University,2003,38(6):633-637.
[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 Wei-yuan.Present status and development ofgeomechanics numerical analysis method[J].ChineseJournal of Rock Mechanics end Engineering,1993,12(1):84-88.
[10]郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.ZHENG Ying-ren,ZHAO Shang-yi.Application ofstrength reduction FEM in soil and rock slope[J].ChineseJournal of Rock Mechanics and Engineering,2004,23(19):3381-3388.
[2]王刚,陈金海,王明星.用加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 Jin-hai,WANG Ming-xing.Applypressure grouting technique in highway high filledembankment[J].Journal of Highway andTransportation Research and Development,2002,19(2):51-52.
[3]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 Guo-qiang,LI Yan,LI Lu-quan.Theory andpractice of high pressure grouting solidification of softintercalation of the freeway cut slope[J].GeotechnicalInvestigation Surveying,1999,(6):36-41.
[4]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 Lin-hong,HE Yong-sheng,XIAN An-ru,et al.Interactions between chemical grouting and groutedmedium[J].Chinese Journal of Geotechnical Engineering,1994,16(6):47-55.
[5]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 De-qun,LI Ying-ning.Application of the pressuregrouting technique in dealing with highway subgradedisease[J].Tianjin Architecture Science andTechnology,2002,12(3):4-6.
[6]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 Jian-wen.Numericalmodeling of grouting in geoengineering[J].ChineseJournal of Rock Mechanics and Engineering,2002,21(3):326-330.
[7]朱宝龙,胡厚田,张玉芳,等.钢管压力注浆型抗滑挡墙在京珠高速公路K108滑坡治理中的应用[J].岩石力学与工程学报,2006,52(2):399-406.ZHU Bao-long,HU Hou-tian,ZHANG Yu-fang,et al.Application of steel-tube bored grouting anti-slidingretaining wall to treatment of landslide k108 inBeijing-Zhuhai expressway[J].Chinese Journal of RockMechanics end Engineering,2006,52(2):399-406.
[8]张玉芳.京珠高速公路108滑坡及防治工程分析[J].西南交通大学学报,2003,38(6):633-637.ZHANG Yu-fang.Analyses of No.108 landslide inBeijing-Zhuhai Highway and its treatment measures[J].Journal of Southwest Jiaotong University,2003,38(6):633-637.
[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 Wei-yuan.Present status and development ofgeomechanics numerical analysis method[J].ChineseJournal of Rock Mechanics end Engineering,1993,12(1):84-88.
[10]郑颖人,赵尚毅.有限元强度折减法在土坡与岩坡中的应用[J].岩石力学与工程学报,2004,23(19):3381-3388.ZHENG Ying-ren,ZHAO Shang-yi.Application ofstrength reduction FEM in soil and rock slope[J].ChineseJournal of Rock Mechanics and Engineering,2004,23(19):3381-3388.
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