含裂隙岩石注浆加固后的弯曲疲劳性能试验研究

doi:10.13722/j.cnki.jrme.2018.0155

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Abstract Neat epoxy resin(EP) and Dibutyl phthalate(DBP) modified epoxy resin were proposed and applied to grout the cracked rock for reinforcement. The cumulative damages of the neat EP grouted samples and DBP modified EP grouted samples under high-frequency three-point fatigue load were compared. The test results showed that the strength，the deflection，and the fatigue performance of cracked rock were obviously increased after grouting. In addition，the grouting effect and the fatigue resistance of the samples with toughened EP were much stronger than that of neat EP. The strain and the damage of samples after grouting reinforcement also exhibited the three-phase behavior(initial damage phase，stability phase，and acceleration phase). The double logarithmic fatigue life equation was established，which has an excellent correlation with the experimental results. Moreover，the damage of toughened EP grouted specimens was less significant than the neat EP grouted samples at the same cycle ratio. Stress level is one of the most important factors affecting the fatigue life.

Key words： rock mechanics three point bending fatigue damage epoxy toughening

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	WANG Zhi
	LI Long

Cite this article:

WANG Zhi,LI Long. Experimental study on bending fatigue behavior of grouting reinforced rock with fracture[J]. , 2018, 37(8): 1823-1832.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0155 OR http://www.rockmech.org/EN/Y2018/V37/I8/1823

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