岩质边坡滑坡治理的现场监测分析
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摘要
滑坡是我国常见的一种地质灾害。在对保涞公路K4段的滑坡进行详细勘察的基础上,采用削坡和锚固两者结合的治理措施,通过现场锚索预应力和锚杆轴力的监测结果表明:滑坡治理后尤其是预应力锚索的张拉,可以阻止边坡局部失稳。同时,从锚索预应力监测随时间的变化规律可以证实,锚索应力以及边坡岩体应力调整变化逐渐趋于稳定,预应力锚索对滑坡的加固机理非常复杂。另外,通过钢筋测力计监测可以大致判断出滑坡潜在滑动面的位置。对滑坡治理后的稳定性进行了细致分析,研究结果为滑坡治理技术的有效性提供了借鉴。
Landslide is a common geological disaster in China.Based on the detailed investigations to landslide on the K4 section of the Baoding-Laishui Highway,treatment measures of cutting slope and anchoring are elaborated and analyzed in this paper.In accordance with the field monitoring results of anchor cable’s prestressing and anchor bar’s axial force,it is indicated that landslide treatment measures especially the prestressed cable’s tension can prevent the local instability of slope.At the same time,results of monitoring to the changing rules of the prestressing for anchor cable along with time confirm that the stress of anchor cable and of side slope rock tend to be stable,and the reinforcement mechanism of prestressed anchor cable in the slope is very complicated.Moreover,the positions of potential sliding surface of slope can be roughly judged through dynamometer for reinforcement bars.The study results also provide detailed analysis on the stability of slope after treatment to landslide which provides some reference for effective technology of landslide control.
Landslide is a common geological disaster in China.Based on the detailed investigations to landslide on the K4 section of the Baoding-Laishui Highway,treatment measures of cutting slope and anchoring are elaborated and analyzed in this paper.In accordance with the field monitoring results of anchor cable’s prestressing and anchor bar’s axial force,it is indicated that landslide treatment measures especially the prestressed cable’s tension can prevent the local instability of slope.At the same time,results of monitoring to the changing rules of the prestressing for anchor cable along with time confirm that the stress of anchor cable and of side slope rock tend to be stable,and the reinforcement mechanism of prestressed anchor cable in the slope is very complicated.Moreover,the positions of potential sliding surface of slope can be roughly judged through dynamometer for reinforcement bars.The study results also provide detailed analysis on the stability of slope after treatment to landslide which provides some reference for effective technology of landslide control.
引文
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[2]El-Kelesh A M,Matsui T.Effect of Soil and Grouting Parameters on the Effectiveness of Compaction Grouting.Proceedings of the Third International Conference:Grouting and Ground Treatment[C]//New Orleans,LA,USA:American Society of Civil Engineers,2003:1056-1070.
[3]廖秋林,杨志法,尚彦军,等.川藏公路102滑坡滑动带力学参数的反分析[J].岩石力学与工程学报,2004,23(24):4119-4123.
[4]曾铃,邱祥,付宏渊,等.水位升降过程中崩解预处理炭质泥岩路堤稳定性分析[J].中国公路学报,2017,30(5):10-19.
[5]王忠福,刘汉东,何思明.阿海水电站进场公路K62滑坡动态变形监测及三维数值分析[J].岩土工程学报,2013,35(s2):94-100.
[6]郑轩,孔令伟.连续桩键结构的抗滑机制及加固效果研究[J].岩土力学,2014(9):2616-2622.
[7]杨长卫,张建经,张明,等.双面高陡岩质边坡地震滑坡机制的研究[J].岩土力学,2013,34(11):3261-3268.
[8]陶连金,沈小辉,王开源,等.某大型高速公路滑坡稳定性分析及锚桩加固的模拟研究[J].工程地质学报,2012,20(2):259-265.
[9]徐则民.基于失稳机制的岩质路基边坡加固方案优化[J].中国公路学报,2008,21(6):7-13.
[10]刘润,闫玥,闫澍旺,等.强风化岩质边坡滑坡治理及有限元分析[J].岩石力学与工程学报,2006,25(s1):2790-2794.
[11]赵瑜,王铁成,李维朝,等.高速公路滑坡稳定性评价及其治理模拟[J].岩石力学与工程学报,2008,27(11):2340-2346.
[12]李新平,王涛,谢全敏,等.高速公路滑坡稳定性分析及治理优化研究[J].岩土力学,2007,28(5):981-990.