岩质边坡滑坡治理的现场监测分析

Analysis of Monitoring on Treatment to Landslide of Rock Slope

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.