水库塌岸预测参数取值体系研究

System of Parameter Selection for Reservoir Bank Collapse Prediction

岸坡岩土体地质结构复杂,塌岸模式众多,塌岸预测参数难以准确获取。在10多座大型水库大量塌岸参数现场调查统计的基础上,分析了塌岸参数的影响因素(包括土体的类型、成因、时代、结构组成等地质因素)、库水的软化作用、库水升降形成的动水作用、风(波)浪冲刷作用,提出了塌岸预测参数的现场调查法、工程类比法、基于分形理论的颗粒组成分析水下稳定坡角分析法等取值方法,给出了基于土体野外地质定名、室内土工试验定名及地质成因相结合的各种类型土体塌岸预测参数取值体系。

Due to the complex geological structure of soil slope,and the numerous bank collapse modes,the parameters of bank collapse prediction are difficult to obtain accurately.On the basis of field parameters of bank collapse survey and statistics of 10 large reservoirs,we analysed the influence factors of bank collapse parameters,including geological factors like the types,origin,era,structure and composition of the soil,as well as the softening effect of reservoir water,water dynamic effect caused by reservoir water lifting,and the wind （wave） scouring effect.Also we proposed several methods to calculate the parameters of the prediction of bank collapse.These methods include the field survey method,the engineering analogy method,and the underwater stable slope angle analysis based on particle composition analysis of fractal theory.Hence we established the system of parameters selection through field geological naming and laboratory soil test naming combined with the geological formation.