干旱、半干旱地区干湿与盐渍复合过程遗址土强度 响应实验研究

崔凯^{1, 2, 3, 4}，谌文武^{2, 4}，沈云霞^{2, 4}，王旭东^{2, 4}，韩文峰^{2, 4}

(1. 兰州理工大学 甘肃省土木工程防灾减灾重点实验室，甘肃 兰州，730050；
2. 兰州大学 西部灾害与环境力学教育部重点实验室，甘肃 兰州，730000；
3. 兰州理工大学 西部土木工程防灾减灾教育部工程研究中心，甘肃 兰州，730050；
4. 中国科学院 寒区旱区环境与工程研究所 冻土工程国家重点实验室，甘肃 兰州，730000)

摘 要：以20处土遗址的物理性质参数测试、易溶盐监测和气候环境研究的相关数据为基本依据，分别掺入不同含量Na₂SO₄和NaCl，并对经历干湿循环的遗址土重塑样进行强度实验，最后结合实验结果和定性分析对复合过程土遗址强度响应的规律与机理进行讨论。研究结果表明：遗址土的抗压、抗拉和抗剪强度对该复合过程产生明显的衰减性响应行为，试样的各种强度参数与掺入盐分的含量之间存在良好的相关关系，而且其回归方程服从指数法则。

关键词：干湿循环；盐渍；复合过程；遗址土；强度响应

Experimental study on response of intensity on earthern ruin’s soil undergoing recombination process of salinized and dry-wet in arid and semi-arid regions

CUI Kai^{1, 2, 3, 4}, CHEN Wen-wu^{2, 4}, SHEN Yun-xia^{2, 4}, WANG Xun-dong^{2, 4}, HAN Wen-feng^{2, 4}

(1. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,
Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Mechanics on Disaster and Environment in Western China,
Ministry of Education, Lanzhou University, Lanzhou 730000, China;
3. Western Center for Disaster Mitigation in Civil Engineering of Ministry of Education of China,
Lanzhou University of Technology, Lanzhou 730050;
4. State Key Laboratory of Frozen Soil Engineering, Gold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou730000, China)

Abstract:Based on abundant correlation data, such as physical testing, salinity monitors and the climatic environment research of twenty earth ruins, the strengths of reconstituted samples going through dry-wet circulation after being mixed with different content of common salt Na₂SO₄ and NaCl were tested. Finally, the regularity and mechanism of earth ruins intensity response with compound process were discussed. The results show that the compressive strength，tensile strength and shearing strength of ruins soil have obvious weaken responsing behavior to this compound process; intensity parameters have good relational dependence on the content of salinity, and moreover, the regression equations obey index principle.

Key words:dry-wet circulation; salinized; recombination process; earthern ruin’s soil; intensity response