干湿交替与盐渍双重作用下干旱和半干旱地区土遗址劣化效应

Effect of deterioration of earthern ruin with joint function of salinized and alternating wet and dry in arid and semi-arid regions

基于明长城遗址、西夏王陵遗址和苏巴什佛教遗址等大型土遗址遗存地区具有集中降雨和强烈蒸发的气候特征,为土遗址创造了干湿交替和盐渍共同作用的赋存环境,研究基于多处土遗址的环境监测数据和物理性质实验结果;通过对实验条件下掺入不同含量的氯化钠并经历干湿循环的遗址土重塑土样的界限含水量、崩解、风洞和弹性波速实验,揭示双重作用下土遗址崩解、稠度、抗风蚀能力和弹性波速等与片状剥离和底部掏蚀病害的发育和发展密切相关性质的变化规律,并对2种病害形成过程以及与上述性质变化的内在联系进行分析和阐释,得出土遗址相关性质发生劣化和病害发育的本质原因。

Based on the fact that Ming Great,Wall Xi-xia King Tomb and Subashi Buddhist have the climate characteristics of concentrated rainfall and intensive evaporation in some districts which creates environment of alternate wet-dry and saline interaction,the environmental monitoring and physical property experiment on several ruins were made.Atterberg limits,disintegration,wind tunnel and elastic wave velocity experiment in laboratory were studied on remodeling sample that mixed different content sodium chlorides and underwent dry-wet cycles after desalination,and the change rules of properties with the joint function of salinized and alternating wet and dry which is closely related to the disease of detachment of surface crust and bottom undercutting was revealed.And relationship between forming process of diseases and these properties change in-depth were studied so that essential reasons for deterioration of some properties and development of disease about earthern ruin were obtained.