Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (7): 1937-1948.doi: 10.16285/j.rsm.2022.1191

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

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

CUI Kai1, 2, GE Cheng-rui1, YU Xiang-peng1, CHEN Rui1, WU Guo-peng1   

  1. 1. Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, Gansu 730050, China; 2. Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, Lanzhou University, Lanzhou, Gansu 730000, China)
  • Received:2022-08-01 Accepted:2023-02-22 Online:2023-07-17 Published:2023-07-16
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52068050, 41562015), the Program for Changjang Scholars and Inovative Research Team in University of Education of China (2017IRT17-51) and the Special Fund of Fundamental Scientific Research Business Expense for Higher School of Gansu Province.

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Abstract: 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.

Key words: arid area, rammed earth, structural property, structural index, drought index

CLC Number: 

  • TU411
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