This paper studies the stress of gravity dam heel with careful numerical simulation, and analyses the effect of the variety of the elastic modulus of homogeneous or non-homogeneous foundations on the principal tensile stresses of gravity dam heel. The conclusions are as follows:① When the elastic modulus of homogeneous dam base and variated element in the critical place is changed with the same the fluctuation, the effect on the dam heel stresses caused by the latter is much more prominent than the former one.

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The maj or obj ect of this paper is the medium.small size concrete dams that have been used for many years.They have the characteristic that the alteration of water height of reservoirs is unobvious and the dams, displacements are affected mainly by temperature.With a case,the method of stepwise regression is used to analyze the vertical displacement prototyDe observed data.Then regression equation is established,the relation of dam,s displacement with hydraulic pressureAAAA黄片免费看、temperature黄片一级片一区、time effect is analyzed and the displacement change rule is obtained,the dam'S displacement onlv dependent to temperature is received.According to the theory of Finite Elements Method,the quasi-stationary temperature field formula and temperature stress formula are deduced.The QTP program and TFEM3D program are written with FORTRAN.The same case is calculated through QTP program to solve the quasi-stationary temperature and through TFEM3 D program to solve the dam'S displacement and find tlle dam,s deformation rule.This rule is accordant with the regression,S resuIt.

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Some questions such as disqualification dam,many cracks in developing dam body,disperse-impregnation in the downstream slope of dam,forming ascending spring owing to marshization in dam back,wadding educts coming from drainage ditch and rearing pond and a lot of seepage amount were occurred.

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The dam body construction working procedure relates the construction cost of dam The research indicated Counter-construction is good to the strain of CFRD The research indicated the distribution of primary and secondary stone body is important to cost of dam the secondary stone body relate with the strain of dan when dam withstand the pressure of water Work in this thesis will play a active role in the research on CFRD.

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This site has a broad U-shape valley and is appropriate for constructing concrete faced rock-filled dam and embankment dam with an asphaltic concrete core. Further studies and comparisons indicated that both types of dam were technically feasible, and concrete faced rock-filled dam had distinct advantage in cost.

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The stress and stability analysis of arch dam and abutment are the main task of traditional arch dam design. Nowadays there are two kinds of analysis method to use. One method is the arch-cantilever load-distribution method, in which the arch dam stress and abutment thrust are calculated, while the stability of abutment is evaluated by rigid body method or other method. The other is FEM method, which evaluates the arch dam stress and stability of abutment at the same time.

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The concrete dam displacement is studied considering the factors such as foundation modulus increasing with depth, seepage coefficient reducing as depth, seepage coefficient anisotropic, curtain and drainage in the dam heel and seepage field and stress field coupling. Some conclusions are obtained: if the foundation is considered only with the seepage volume load, the dam top horizontal displacement of the reference base point develops upstream. When the foundation size increases, the reference base point's horizontal displacement increases. However, the value measured by the reversed pendulum anchored to the rock foundation is often regarded to be absolute displacement. The above practice is estimated to be limited when the water load on the dam foundation is taken into account.

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A finite element numerical model for arch dam-gravity pier-foundation system was established to evaluate the effect of high gravity piers on the stress, deformation and anti-sliding stability of Sizhai arch dam, taking the following factors into account, such as the possible elastoplastic deformation of foundation rocks and the nonlinear interaction between the interfaces of gravity pier-dam foundation, the joint surfaces beneath the right bank, and the interfaces of arch dam-gravity pier.

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One of the main dam shirakawa Weng Chong in the vicinity of River Creek, the dam 960 meters long, 66 meters high;潮河main dam near潮河soda plant in the South, the dam of 1008 meters long, 56 meters high.

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