中文摘要：

顺层边坡的破坏范围及稳定性一般受工程扰动影响较大。以华丽金沙江桥华坪岸顺层边坡为研究对象,利用现场调查、地质力学方法和数值分析,综合确定华坪岸边坡破坏模式主要为后缘陡倾结构面控制剪入＋T2凝灰岩软弱夹层主滑＋前缘缓倾结构面剪出破坏控制。基于此,制作考虑后缘陡倾结构面和顺层软弱夹层边坡模型,设计了不同桥基荷载和水平荷载组合工况,分析余推力、位移、应力和应变发现：不同工况临界水平荷载为1.89-3.15 k N,临界水平地震加速度值为0.134 g~0.208 g,除100 a设防自然工况不满足外,其余条件下华坪岸边坡均满足工程区修正后地震设防标准0.105 g（50 a）和0.144 g（100 a）的要求。在模型试验过程中,数据的灵敏度和稳定性排序为表观应力和位移〉内部应力〉应变;传感器的费效比排序为量力环〉百分表〉土压力盒〉应变片。

英文摘要：

The failure range and the stability of a bedding rock slope are often affected by the construction disturbance. The bedding slope of Huaping at Jinshajiang bridge connecting the Huali highway was studied in the paper. The results of the in-situ survey,geomechanical analysis and simulation revealed the structure and failure mode of the slope. The model test was carried out under the different combinations of abutment and horizontal loadings,and mechanical analysis was performed. The results indicate that critical horizontal load of different schemes vary from 1.89 to 3.15 k N and that relative limit horizontal seismic accelerations vibrate from 0.134 g to 0.208 g. With the exception of working condition of 100 years seismic fortification criterion,other seismic conditions of Huaping bank slope all meet the revised criterion of 0.105 g（50 years）and 0.144 g（100 years）. During model test process,sensitivity and stability rank of monitoring datum are surface force and displacement,inner stress and strain. Sensors？ cost-benefit ratio ranks are force-measure ring,centigrade indicator,mini soil pressure cell and strain gage.