腐蚀环境下锚固顺层边坡时效演化行为模型试验

doi:10.13722/j.cnki.jrme.2016.1095

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Abstract

For better understanding time-dependent evolutionary behavior of anchored bedding slope in corrosion environment，a prestressed anchored slope model test systems which can simulate complex corrosive environment was developed. Using the test systems，an anchor bedding slope geomechanical model test was carried out，in which the corrosion of the free section of anchoring is simulated. Based on test results，the electrochemical corrosion process of pre-stressed anchor bar，anchorage loss laws and long-term deformation characteristics of anchored slope were analyzed. It was found that：(1) The anchor bar enter activation corrosion state rapidly as contacting with the etching solution. The corrosion rate of anchor bar is high in initial stage，with the increase of immersion time，the corrosion rate decreases gradually，and the corrosion rate stabilized after about 30–60 days. (2) Cl^－，O₂ in the environment and pre-stress will significantly increase the corrosion rate of anchor bar. (3) Corrosive effects did not significantly accelerate loss of prestress when both ends are anchored well，and prestress losses of anchorage are mainly influenced by the initial anchoring force and rock deformation after corrosion of free section. (4) Deformation of different parts of anchored slope is mainly related to rock mass structure，gravity stress and anchor force，and reinforcement corrosion in free section does not directly affect the slope deformation. Anchoring force drastically reducing caused by corrosion of anchoring section or the failure of anchor bar caused by corrosion could significantly affect the deformation and stability of the slope. Test results can provide scientific basis for long-term safety assessment of anchored bedding slope.

Key words： slope engineering corrosive environment bedding slope prestressed anchorage evolutionary behavior model test electrochemistry

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	Articles by authors
	LI Cong1
	ZHU Jiebing1
	WANG Bin1
	LIU Zhijun2
	JIANG Yuzhou1
	LIU Xiaohong1
	ZENG Ping1

Cite this article:

LI Cong1,ZHU Jiebing1,WANG Bin1, et al. Model tests for time-dependent evolutionary behavior of anchored bedding slope in corrosion environment[J]. , 2018, 37(S1): 3215-3222.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.1095 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3215

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