针对黄土自重湿陷量计算值与实测值不一致的问题,通过分析自重湿陷量计算理论建立的条件,以及现场浸水试验黄土浸水湿陷的实际受力史和变形史,指出自重湿陷量计算值与实测值的构成差异,探讨主要影响因素,分析作用机理,提出黄土自重湿陷性室内评价的改进理论.改进理论体现了黄土浸水湿陷的实际条件,并将因地区土质而异的修正系数修正为根据地区现场浸水试验资料确定的经验修正系数,应用上具有普遍适用性,理论上更为完善.自重湿陷系数的改进理论值δzs与现行理论值δzs的比值随上覆土压力的增大而增大,上覆土压力是影响自重湿陷量计算值与实测值差异的重要因素之一.
For the amount of weight loss of loess are inconsistent under calculating and measuring,through to analysis the conditions to establish the theory on calculated collapse under overburden pressure,as well as the actual stress history and deformation history in loess on-site immersion test,the constitute difference of the calculated and measured collapse under overburden pressure was pointed out,the main factors were explored.The mechanism of action was analyzed,an improved theory of loess oncollapsible evaluation under overburden pressure is put forward.The improved theory reflects the actual conditions of loess flooding collapsible,and correction coefficient varying from region to region soil is amended into experience correction coefficient determined according to the regional on-site immersion test,universal applicability in application,more perfect and reasonable in theory.The ratio of the improved and current theoretical value on coefficient of collapsibility under overburden pressure increases with the overburden pressure increases,the overburden pressure is one of the important factors that affect the difference of the calculated and measured collapse under overburden pressure.