By means of the finite element inverse analysis , based on stress - strain theoretical equations of the elastoplasticity and viscoelasticity - viscoplasticity , the change of the valley - side margin stress distribution during original state , the condition of human cutting a terrace of building houses in the loess slope , and the condition of cutting the top of loess slope is elucidated 3 .基于粘弹?粘塑性理论的本构方程，运用有限元方法进行反演分析，阐明了宅基边坡谷缘在天然条件、斩坡建窑条件下和削坡条件下的应力场变化特点。结果表明，谷缘在斩坡建窑条件下拉张应力和剪切应力增大是导致崩塌产生的根本原因。
( 2 ) the finite element is used to analyze the stress field change of the valley - side margin during original state , the condition of human ' s cutting a terrace of building houses in the loess slope , and the condition of cutting the top of loess slope , then the dynamic mechanism for forming of the landfall is probed 采用有限单元法对宅基边坡谷缘在天然条件、斩坡建窑条件及削坡处理条件的应力场变化进行了对比分析，揭示了崩塌产生的动力学机制，从而为人工谷缘整治提供了科学依据。
Slope failure is one of the most popular styles of nature disasters , it offen happens with earthquakes or rainstorms . the important reasons causing slopes failure are human activity that slopeing , buliding dams or embankments ( especially on soft base ) , digging ground engineering , sluicing in reservoirs , etc . therefore , many researchers focus on slopes in many aspects 滑坡是自然界相当普遍的自然灾害之一，通常伴随着地震、暴雨发生，人为的削坡、修建堤坝(特别是在软土地基上) 、地下工程的开挖、水库蓄水等原因是导致滑坡的重要原因，于是对滑坡进行研究成为学者们的重要课题。
The northern section dbl covered under this contract primarily comprises the construction of viaduct with some at grade sections and cut slopes at the northern end where the road passes through the northern extremity of the tsing shan range . it connects the hk - swc to the southern section near castle peak road 合约项下的北段后海湾干线北段主要包括建造高架路，在北端设有地面路段和削坡，道路会在该处横过青山岭北端的山边，把深港西部通道与青山公路附近的南段连接起来。
On the basis of these conclusions , the stability of natural 2 # landslide body of hongjiadu hydraulic power plant is analyzed with this finite element iteration method and the uniform value off on the sliding surface of the landslide body is inversed . meanwhile , the stability of scaled 2 # landslide body of hongjiadu hydraulic power plant is analyzed and downslide force of scaled 2 # landslide body and normal stress and shear stress on the sliding surface are obtained . in addition , the results provide a reference for reinforcing structure ' s layout 在此基础上，文中用该方法对天然状态的洪家渡水电站2 #塌滑体进行了稳定分析，反演了塌滑体滑动面上均化的f值，对部分削坡后的洪家渡水电站2 #塌滑体进行了稳定分析，获得了部分削坡后塌滑体的下滑力和滑动面上的正、剪应力分布，为加固结构布置提供了依据。
Through these studies and analysis , following conclusions could be drawn : ( 1 ) it is necessary to study on harness engineering of landslide and dangerous rock since the main representations of this geological hazard are landslide and dangerous rock through geological investigation ; ( 2 ) it can be concluded though stability analysis that the dingzhuang landslide is stable naturally , which is identical to the in - situ investigation ; ( 3 ) through stability analysis , the landslide would slide if the water level dropped down from 175 . 10m to 156 . 0m and it rained successively after the three gorges reservoir work . ( 4 ) according to the results of calculation and the characteristic of the landslide , it is suggested that such measures as unloading at upper part , anchorage and pile supporting system and drainage system should be used on the landslide . ( 5 ) according to geological investigation , there are three kinds of dangerous rock in the engineering , those are failing - down rock , collapsing rock and sliding rock 因此有必要对滑坡进行治理； ( 4 )根据滑坡推力计算结果和本滑坡属牵引式滑坡的特点，滑坡体上部相对较稳定，中下部处于基本稳定或不稳定状态，因此建议此滑坡治理采用上部削坡减载与锚拉抗滑桩、挡墙进行支挡结合的处理方法，同时结合截排水等措施进行综合治理； ( 5 )根据地勘资料，通过对危岩体的形态、规模、基座和底界层及分布特点和分析，将本工程危岩体失稳崩塌的方式归纳为坠落式、倾倒式和滑塌式三种类型并分别提出相应的稳定性计算方法； ( 6 )分别对本工程中的危岩体进行了稳定性计算，并且发现其都处于不稳定状态，因此根据实际情况分别提出相应衬砌支撑和清理等加固治理措施，最后还对加固后的危岩体进行了校核计算，满足要求。
Secondly , on the basis of mechanic properties analysis , applying the stress - strain model of lateral unloading which can reflect the decrease change of principal stress state in the excavation progress of slope , dividing excavations slope into cutting slope and sharpen slope , numerical simulation is respectively carried through in order to analyze the impact of changing of slope type , slope height and stratum water content on the slope stability 其次，在试验研究的基础上，应用能够反映黄土挖方边坡大、小主应力减小变化的围压卸荷剪切应力应变模型，将挖方边坡区分为路堑边坡和削坡，通过数值模拟开挖过程分析了坡高、坡型、坡比及地层含水量变化对边坡稳定性的影响。
The stability of the landslide is a critical problem for feasibility of the project , and has a direct influence upon the operation of the lower reservoir and the power system . the sliding mass has been studied by some designer in geological investigation . the study showed that guishan sliding mass is in stabilization under natural condition , is not in stabilization under vii earthquake intensity 在前期的研究中曾对滑坡体的稳定问题进行了研究，研究结果认为从宏观定性分析，滑体处于稳定状态，但经过计算，在度地震烈度下，处于极限平衡或不稳定状态，为确保工程安全，对推动式的龟山滑坡体采取削坡减载的开挖方式将是行之有效的方案，这样可以提高滑坡体在地震条件下的稳定性，因此，研究龟山滑坡体在不同开挖方式方案条件下的稳定性问题具有非常重要的实际意义。
