随着我国国民经济的大力发展，以高速公路为代表的高等级公路已由平原进入山区，山区高等级公路建设越来越多，由此带来的高填、深挖路基也将增多。因此，正确评价边坡的稳定性，使工程建设符合安全、合理的原则，是十分重要的。 本文阐述了评价土质边坡稳定的普遍极限平衡法以及瑞典法、毕肖普简化法、滑楔法、斯宾塞法等简化方法及其简化处理对计算精度的影响。 夏家河滑坡位于勉宁高速公路K30＋830～K31＋000路段右侧，场地地形复杂，属中低山地貌。场地出露地层主要为第四系滑坡堆积、坡残积、冲洪积亚粘土以及寒武系泥质砂岩，为大型土质滑坡。本文应用传递系数法和软件GeoStudio中的Slope/W模块对滑坡进行计算后得出该滑坡为临界稳定状态，应用软件ANSYS8.0对该滑坡进行应力应变分析表明，在滑坡的不同岩性交界面上运动趋势较为明显；用FLAC2D对滑坡进行计算后得出其安全系数为0.95，较实际地反映了滑坡的状态。造成滑坡的主要原因是由于坡脚开挖引起大变形破坏，产生临空面，使公路右侧部分山体古滑坡复苏，以及雨水的坡体效应、减强效应与软化作用。 针对夏家河滑坡剩余下滑力大的特点，在对其加固方案进行比选的基础上，选择采用抗滑桩、重力式挡墙和排水措施相结合的复合加固措施，并对抗滑桩和重力式挡土墙所受荷载、内力、稳定性和配筋等方面进行了有关参数设计与详细计算，结果均满足规范要求，设计合理；最后提出了滑坡在加固施工过程中应注意的有关事项。 本文提出的滑坡稳定性评价方法和滑坡处治技术对今后在山区高速公路治理类似滑坡具有一定的借鉴作用。

Along with our country national economy vigorously development, the freeway entered the mountainous area ,the mountainous area freeway construction are more and more many, this will bring fills in, deep cuts the roadbed high also to increase. Therefore, judges the side slope stability correctly, causes the engineering construction to conform to the security, the reasonable principle is extremely important. The Xiajia river landslide is located in the right K30+ 830 ~ K31 + 000 road sections of Mian-Ning freeway, the terrain is complex and is attributed to the low mountain physiognomy. The cumuli layers、remnant layers and diluvium clay of Q4, slimy sandstone of Cambrian are revealed, the slope is large-scale soil landslide. In the article the GLE method and the Swedish method, Simplified Bishop method, the Slippery wedge method, the Spencer method and so on has carried on the comprehensive elaboration, it is also introduced that simplified methods affect the caculational precition. In addition, the landslide stability analysis with stress -strain analysis theory and the method are introduced. In the article the soil landslide characteristic, intensity characteristic and rock & soil parameters are disserted by Xiajia river landslide. Using unbalanced thrust transmission method and Slope/W module in the software GeoStudio, appraised the landslide stability which is the critical steady state, carried on the stress -strain analysis with software ANSYS 8.0 to indicate the movement tendency was obvious on the landslide interface, on the computation with FLAC2D to the landslide to obtain the Fos is 0.95, also reflect the landslide actually stability condition. The reasions cause the landslide destruction that are excavating in slope feet and raining. Considering Xiajia River is the character of huge soil landslide and big residul sliding force, have selected anti-slide pile, gravity retaining wall and drained ditch to reinforce the landslide. And calculate what’s the necessary of the selected reinforce methods, the results accorded with criterions and the designs are rational. Finally the items which should pay attention in the reinforcement construction process have carried on the brief elaboration to this landslide. This article proposed the landslide stability assessment method and the landslide reinforcement technology are useful of the similar landslide.