Rock and Soil Mechanics ›› 2020, Vol. 41 ›› Issue (7): 2199-2206.doi: 10.16285/j.rsm.2019.1508

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study on the effect of sulfate on glutenite weathering in Maijishan grottoes

WANG Feng-rui1, 2, JIAO Da-ding1, LIU Ping1, 3, SUN Bo1, 2, WANG Jia-jie1, YANG Hong-rui1   

  1. 1. College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, China; 2. Northwest Research Institute Co., Ltd., of CREC, Lanzhou, Gansu 730000, China; 3. Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou University, Ministry of Education, Lanzhou, Gansu 730000, China
  • Received:2019-09-02 Revised:2019-12-16 Online:2020-07-10 Published:2020-09-10
  • Contact: 刘平，男，1981年生，博士，副教授，主要从事古遗址保护工程和地质灾害防治工程方面的研究。Email: liuping@lzu.edu.cn E-mail:651704456@qq.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51408285), the Fundamental Research Funds for the Central Universities (lzujbky-2016-k15) and the Science and Technology Item Foundation of Northwest Research Institute Co.Ltd. of CREC.

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Abstract: The phenomenon of silting and spalling is very common during glutenite weathering in Maijishan grottoes. Previous studies have shown that the participation of salt greatly accelerates the weathering process of rock. In this paper, several sets of cylindrical specimens made of glutenite were used in two tests, namely capillary migration test and cycle degradation test. The migration patterns of sulfate in samples and the failure characteristics of the glutenite specimens were discussed. Based on the experimental data and theoretical analysis, the crystallization pressure in glutenite samples was calculated. This is an important parameter for judging the damage of glutenite caused by salt crystallization. The results show that: the crystallization of sodium sulfate caused substantial damage to glutenite; the migration of sulfate in glutenite had regularity; when the concentration of sodium sulfate solution was between 0.95 mol/L and 1.13 mol/L, the destruction of the conglomerate began. The theoretical maximum crystallization pressure could reach 33 MPa under the experimental conditions.

Key words: Maijishan grottoes, glutenite weathering, crystallization pressure, sodium sulfate solution

CLC Number: 

  • TU 452
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