Study On Optimization Design Of Hollow Gravity Dam Section

Hollow gravity dam is a dam type of modalities, namely setting up a cavity withinthe gravity dam, dam body concrete can not only save the amount, and can reduce thecontact area of dam body and dam foundation, so as to reduce the dam bottom upliftpressure. The structure of hollow gravity dam at home and abroad was analyzed andnumerical simulation research, have achieved good results, but only for a projectexample, mostly without the comparison and analysis on the overall system, leading toresearch more one-sided. Especially cavity structure of comparison and analysis ofdifferent shapes, different depth-span ratio on the hollow gravity dam stress research isnot comprehensive enough and system, so it is necessary to shape optimization ofhollow dam section of the research, and provide theory basis for design andconstruction of hollow gravity dam.Based on the contribution to daiyu valley reservoir slurry masonry gravity dam onan empty stomach, using finite element software ABAQUS to establish a variety ofhollow gravity dam section model, were able to study the following several aspects:1. ABAQUS software is used to establish the sectorial hollow gravity dam model,has carried on the initial ground stress field analysis; Contrast under different conditionswere analyzed the stress and displacement distribution of the dam, in the condition of Ⅱ(design flood level) under the condition of different parameters of hollow gravity dam’sstress and displacement distribution on an empty stomach.2. ABAQUS software is used to establish the parameters optimization of the fancavity shape and hollow gravity dam model, analysis of the city, the gate shape and holetype upstream and downstream sidewall are tend to the upstream abdominal cavity inthe shape of a hollow gravity dam under the opening rate of stress and displacementdistribution. Through the analysis, found that the stress of the hollow gravity dam andgravity dam, the same as the opening rate increasing, the same cavity shape of hollowgravity dam heel and tensile stress inside the cavity showed a trend of increasegradually; Also according to the set up on an empty stomach, switching station andwater gate of the power plant determine the opening rate of fasting; Cavity in tensionand compression stress mainly appears in the vault to the left and right at the bottom ofthe cavity, if focusing on stress distribution, it is recommended to select upperabdominal holes in practical engineering construction upstream and downstreamsidewall tendency type cavity shape. If set up within the cavity, the according to specific situation.3. This paper analyzes the various cavity shape stability against sliding of gravitydam on an empty stomach; Results show that under the three cavity shape of hollowgravity dam can satisfy the requirements of stability against sliding;4. on the basis of numerical analysis model (anti-sliding stability, stress distribution,etc.) the result of checking the index to the rationality and feasibility of the originaldesign of hollow gravity dam, puts forward the corresponding modification andimprovement scheme of the dam body shape is optimized.The paper work for our country’s theory and practice of hollow gravity dam providebeneficial guidance, thus has significance.