The synchronous observations of deformation and gravity before and after impounding are analyzed comprehensively , and the possible effect on the seismogenic environment and potential seismic source is discussed and a new idea about reservoir earthquake is presented by developing a numerical model to analyse the change of tectonic stress field 综合分析了三峡水库蓄水前后形变、重力等同步观测资料；论述了蓄水库首区孕震环境与潜在震源可能的影响，并提出了一些研究设想。
When the three - gorge reservoir is sluiced , the underground water level will ascend obviously and mechanics parameters of the slip strip below the reservoir water level can drop further , sidaogou landslide can lose stability wholly in controlled condition influenced by buoyancy of underground water and saturation stress at water level dropping 三峡水库蓄水后，滑体内的地下水位将明显抬高，库水以下的滑带力学参数会进一步降低，受滑体内地下水扬压力及水库水位降落时渗透压力的影响，四道沟滑坡在控制工况下可能整体失稳。
Therefor sampling is made in the reservoir area , and the samples are soaked in the simulated reservoir environment . chemical analysis is made to the soaked fluid , which shows that the reservoir water will not be worsen by the harmful material in the rock and earth , but chemical detecting shall be carried out to some elements 为此，对库区中的岩土进行了分别取样，并采用模拟库水浸泡岩样，对浸泡液进行化学检测分析.结果表明，水库蓄水后不会因岩土中存在有害物质造成水质恶化问题，但应对某些元素进行监测
On basis of the concrete character of the whole reservoir bank , the reconstruction of reservoir bank is valuated and forecasted by means of analogy method , which means to acquire the ultimately stable slope angel of zone being affected by reservoir water after reservoir storing water by analogy to the slopes " configuration parameters of the yangtze river before the reservoir storing water 针对库区的具体情况，采用现代长江河谷岸坡形态参数类推水库蓄水后相应水位作用带的最终稳定坡角，对145m和175m两种库水位条件下的库岸再造进行了预测和评价。预测和评价结果表明，再造强烈的库岸段累计总长4 . 05km ，占整个库岸总长( 10 . 352km )的39 . 1 。
This paper establishes a model simulating dam actual placing process and considering the non - continuity of initial temperature on the boundary of new and old concrete , daily air temperature change , concrete - placing temperature , hydration heat , heat insulation on boundary , water - storing process , placing intermission and curing with water . the calculation of stress field considers the concrete weight , static water pressure , thermal stress , different autogenous volume change between rcc and normal concrete , change of elastic modulus of concrete with age and creep action 考虑了乞今最为全面的初始条件和边界条件，包括模拟坝体的实际升程过程，考虑了新老混凝土接触面上的初始温度不连续，逐日的气温变化，混凝土的入仓温度，水化热温升，边界保温，水库蓄水过程，浇筑间歇以及洒水养生等因素；应力场的计算考虑了混凝土的自重，静水压力，温度应力，常态混凝土与碾压混凝土不同的自生体积变形，混凝土的弹性模量随龄期的变化以及徐变的作用。
The main results and conclusions are as following in this research : ( 1 ) the less stability section of sidaogou landslide is mainly middle - below of slope , when the three - gorge reservoir is sluiced , some of slope ( mainly middle - below of slope ) will be aroused to slide and lose stability wholly under disadvantage of reservoir water marinating and saturation stress 通过本次研究，得出了如下结论： 1四道沟滑坡稳定性较差的主要是中下部滑体，三峡水库蓄水后，在库水浸泡、渗透压力等不利因素的作用下，将引起一定范围内滑体(主要是中下部滑体)整体滑移失稳。
