西北干旱区遗址夯土结构特性初探  

A preliminary study on the structural characteristics of rammed earth at the sitein arid area of Northwest China

作　　者：崔凯[1,2] 葛诚瑞 于翔鹏 陈瑞 吴国鹏 CUI Kai;GE Cheng-rui;YU Xiang-peng;CHEN Rui;WU Guo-peng(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou,Gansu 730050,China;Key Laboratory of Mechanics on Disaster and Environment in Western China,Ministry of Education,Lanzhou University,Lanzhou,Gansu 730000,China)

机构地区：[1]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 [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

出　　处：《岩土力学》2023年第7期1937-1948,共12页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.52068050,No.41562015);教育部长江学者创新团队支持计划项目(No.2017IRT17-51);甘肃省高校基本科研业务费专项资金项目。

摘　　要：古代夯土这种经过人工取材分选、夯击并且在历史进程中接受环境陈化形成的特殊土体,其结构性及表征研究是西北干旱区夯土遗址保护领域所面临的基础性问题。研究选择分布于3个气候区域、5个朝代的15处典型遗址夯土为研究对象,通过基本物理性质测试、侧限压缩试验及无侧限单轴压缩试验与结构性理论分析,展开了对夯土结构性的初步研究。研究结果表明:15处典型遗址夯土的粒径分布、液性指数、结构屈服压力及抗压强度均随建造时代、赋存环境呈规律性变化,原状、重塑夯土的压缩性、强度及应力-应变特征表现出较大的差异性,其构度与上述的宏观性质指标具有良好的一致性表述,夯土的结构势变化中水敏势占主导作用,且扰动势、水敏势与建造距今年限和干旱指数均存在显著的线性对应关系。The study on the structure and characterization of ancient rammed earth,a special soil formed by artificial selection,tamping and environmental aging in the historical process,is a fundamental problem in the field of rammed earth site protection in the arid area of Northwest China.Fifteen typical sites of rammed earth distributed in three climatic regions and five dynasties were selected as the research objects.Through the basic physical properties test,confined compression test,unconfined uniaxial compression test and structural theoretical analysis,the preliminary research on the structure of rammed earth is carried out.The results show that the particle size distribution,liquidity index,structural yield pressure and the compressive strength of rammed earth at 15 typical sites show regular changes with building age and environment.The compressibility,strength and stress-strain characteristics of undisturbed and remolded rammed earth show larger differences;its structure index and the above-mentioned macroscopic properties index have a good consistency.The water-sensitive potential plays a predominant role in the change of structural potential,the disturbance potential and water-sensitive potential have a significantly linear relationship with the dating of construction and drought index.

关 键 词：干旱区 夯土 结构特性 构度 干旱指数 

分 类 号：TU411[建筑科学—岩土工程]