【作者】 仲琳；

【导师】 郑东健；

【作者基本信息】 河海大学 ， 水工结构工程， 2005， 硕士

【摘要】 碾压混凝土坝是近年来应用较为广泛的一种坝型,由于特殊的施工工艺使其渗流、变形特性与常规混凝土坝存在较大的差异。本文对碾压混凝土坝渗流、变形安全监控模型进行了较为深入的研究,主要内容如下: (1)利用坝体温度边界条件和温度计实测资料,建立坝体温度场时空分布模型并用温度场分析渗流场的性态;根据渗流量等效原理结合单裂隙渗流理论,发展和完善了坝体渗流量监控模型,并利用偏最小二乘法和遗传模拟退火算法对渗流监控模型参数进行优化。 (2)根据碾压混凝土坝具有横观各向同性的特点,研究了碾压混凝土坝变形监控模型水压分量的因子模式,同时对温度分量进行了改进,建立了碾压混凝土坝变形的混合模型,并利用计算结果对层面弹性参数进行了分析。 (3)基于实测资料构建了碾压混凝土坝层面性态的评价因素集,并应用多层次模糊综合评判方法对碾压混凝土坝层面性态进行综合评判。 (4)应用前述的理论和方法,建立了水东碾压混凝土坝运行期坝体渗流量监控模型、变形混合监控模型,并对碾压层层面性态进行了模糊综合评判。更多还原

【Abstract】 Roller Compacted Concrete Dam(RCCD) is one new type of dam, which has different characteristics in seepage and deformation to normal conrcete dam. The model of safety monitoring to seepage and deformation for RCCD is studied deeply. The main contents are as follows:(1) The space-time distribution model of dam temperature field is established basing on the temperature boundary conditions and the observation datas of thermometer. The seepage safety monitoring model of RCCD is established by using the principle of seepage rate equal effects and the theory of single crack seepage model in rock mechanics. In addition, the least square and genetic simulated annealing algorithms are applied to optimize the parameters of the seepage monitoring model.(2) According to the transverse isotropic character of RCCD, the method of determining the safety monitoring RCCD deformation model basing on modified water pressure factor and temperature factor is proposed. And the elastic modulus of the effect zones are analyzed.(3) The critical factors of RCCD’s interface property are acquired basing on the observation datas. The RCCD’s interface property is evaluated by using the multi-layer fuzzy comprehensive appraisal method.(4) Applying the theories and methods presented in this thesis, the seepage and deformation monitoring models of the Shuidong RCC dam is established. In addition, the synthesis evaluation model of its interface property is established, and its behavior is evaluated.更多还原