粤赣高速公路k35高边坡加固效果监测与评价

粤赣高速公路k35高边坡设计方案中，选用全、强风化变质砂岩的强度参数，Janbu法和M-P法计算的安全系数均超过1.20，边坡处于稳定状态。然而，该坡的监测结果显示，强降雨后该坡的变形急剧增加，坡体处于非稳定变形状态，和设计计算结果不符。因此，文中结合边坡监测资料，重新选取计算参数，对该坡稳定性进行验算，Janbu法和M-P法验算的安全系数均小于1.05，边坡处于非稳定状态。以验算结果为依据，对该坡进行补强加固设计，并验算补强后的安全系数Fs。补强后，监测结果显示坡体变形速率迅速回落，边坡处于稳定变形状态。监测结果验证了补强加固是有效的。

Monitoring and evaluation high slope k35 of Yue-Gan Expressway

The design of the high slope k35 of expressway which links Guangdong and Jiangxi provinces selected the strength parameter of thoroughly met sandstone, and the values of safety coefficient F is worked out by Janbu and M-P methods were all more than 1.20, which indicated that the slope was in a stable condition. But the result of monitoring which didn’t confirm to the design indicated that this slope deformation increased sharply and the slope was in an unstable deformation condition after the strong rainfall. Therefore, on the basis of data of the monitoring, selected a new calculation parameter and made a checking calculation on the stability of slope. The result of the safety coefficient was Fs = 1.05, which showed the slope was in an unstable condition. According to the checking computations, the slope should be strengthened and consolidated; and the safety coefficient Fs should be checked after strengthening the slope. The result approved the effectiveness of the strengthening. After that, the deformation of the slope came down fast and it recovered a normal condition.