氯化钠溶液腐蚀板岩蠕变特性及改进 H|M模型研究

doi:10.13722/j.cnki.jrme.2015.1478

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Abstract Due to the status that lack of researches on seawater corrosion slate creep，with Dalian Metro as study object，the NaCl solution corrosion-creep experiment and model research are carried out. Firstly，the experiment of slate immersion in NaCl solution is performed. By contrast of SEM images and EDS elements from mesoscopic perspective，and combination of longitudinal wave velocity and pH value analysis，the test specimens corrosion characteristics with different immersion periods are revealed. Then，by RLW–2000 rock mechanics triaxial rheological system，creep experiment is carried out，and the test specimens creep curve and characteristics in immediate deformation，initial phase，stable phase and acceleration phase are analyzed from macroscopic perspective. The long-term strength，creep rate，and elasticity modulus change rule with different immersion periods are summarized. Finally，based on experiment results，introducing a five-component nonlinear viscoelasto- plastic rheological model(H|M-CD model) with consideration of chemical corrosion，and the model parameter recognition is realized by 1stOpt optimization software. The research results indicate that NaCl solutions corrosiveness has changed slates creep mechanics properties，with the increase of immersion time，the acceleration phases speed increases，and creep time shortens. The longer the immersion time is，the obvious the damage feature becomes. The model theory curve accords with experiment curve in three phases，and indicates that the model H|M-CD proposed above is capable to describe the whole creep process of corrosion slate. The research results provide reference and basis for long-term stability evaluation on slate rock engineering in seawater environment.

Key words： rock mechanics；NaCl；chemical corrosion；slate；creep；modified H M model

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	Articles by authors
	JIANG Zongbin1
	JIANG Annan1
	LI Hong2

Cite this article:

JIANG Zongbin1,JIANG Annan1,LI Hong2. Research on slate creep experiment and a modified H|M model in NaCl solution corrosion[J]. , 2016, 35(S2): 3725-3733.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.1478 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS2/3725

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