黄土高原边坡冻融病害调查及现场测试研究

通过调查及现场测试开展了黄土高原边坡冻融病害及其机理的探讨研究。根据调查结果,将黄土高原边坡冻融病害分为挡土墙的破坏、锚索支护结构冻胀病害、边坡表皮冻融剥蚀、边坡层状冻融剥落、边坡浅层滑塌,并初步探讨了病害产生的原因;现场温度场和水分场的测试结果表明:冬季随着地表温度的降低,冻结锋面向下移动,冻土层厚度增加,冻土层含水量越来越大,冻土层下方未冻土含水量明显降低,可为进一步深入研究冻融病害机理提供参考依据。

Investigation and Field Test Studies on Freezing-thawing Disease of the Loess Plateau Slope

Through investigation and field test, the freezing-thawing disease in the loess plateau and its mechanism were studied. According to the survey, the loess plateau freezing-thawing disease can be divided into retaining wall damage, anchor supporting structure damage, freeze-thaw erosion of slope skin, spalling hazards in slope and shallow slope sliding, and their mechanism are discussed preliminarily. Field testing result shows that the freezing front moves downward with the surface temperature decreasing. Then the water content of frozen soil zone increased and it reduced significantly below the frozen soil zone. This study can provide reference for further study of the mechanism of freezing-thawing disease.