Correlation and Distribution Model between Compressive Strength and Permeability Coefficient for High-pressure Jet Grouting Wall in Earth-rock Dam
Correlation and distribution model between compressive strength and permeability coefficient of cutoff wall are the key factors af-fecting the reliability analysis of cutoff wall strength and permeability failure of earth-rock dam.The testing data of high pressure jet grouting wall of 9 earth-rock dams are collected.AIC criterion is used to identify the best marginal distribution type of compressive strength,permea-bility coefficient and the best Copula function of correlation joint distribution model.The Bootstrap method was used to simulate the statistical uncertainty of the identification results.The results show that there is a significant negative correlation between compressive strength and per-meability coefficient,which mainly obeys Weibull distribution.Frank Copula is identified as the best function used to construct the non-nor-mal joint distribution between the two parameters.The identification difference of the best distribution type and best Copula function is main-ly due to the different frequency distribution caused by the construction quality of cutoff wall.The research results can provide a simple and effective distribution mode for the reliability analysis of strength reliability of high-pressure Jet cutoff wall and permeability stability of earth-rock dam.
earth-rock damhigh-pressure jet grouting walljoint probability distributioncompressive strengthpermeability coefficientCopula
万方数据
维普
