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选取某水库左岸边坡为对象,结合有关的岩土工程勘察报告,分别利用赤平投影法、极限平衡法对其稳定性进行了分析,两者分析结果均表明该边坡属不稳定边坡。分别采用桩锚支护、岩石锚喷及锚杆网格梁三种支护方法进行分析,岩石锚喷支护在工期、投入、成本方面占有优势,但安全性最差;桩锚支护和锚杆网格梁的安全性较高;桩锚支护成本与设备投入较大。经综合分析论证,采用锚杆网格梁支护方式为该边坡的最优支护方案达到了相关要求,并具有最佳经济效益。
The left bank slope of a reservoir is selected as the object. Based on the relevant geotechnical investigation report, the stability of the reservoir is analyzed by the method of the equatorial projection and the limit equilibrium method respectively. Both of the analysis results show that the slope is an unstable slope. The three kinds of support methods of pile-anchor support, rock bolt-on-anchor and bolt grid girder are respectively analyzed. Rock bolting and shotcreting support takes the advantage of construction period, input and cost, but the safety is the worst; The safety of the anchor grid beam is high; the cost of pile and anchor support and equipment investment are large. After comprehensive analysis and demonstration, the optimal support scheme for the slope is adopted with the support method of the grid girder of the bolt, which has the best economic benefit.