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.

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

[1]	唐树名，曾祥勇，邓安福. 预应力锚索群锚锚固边坡均质岩体的室内模型试验研究[J]. 中国公路学报，2004，17(3)：20-24.(TANG Shuming，ZENG Xiangyong，DENG Anfu. Laboratory model test investigation of prestressed anchor cable group strengthened slope intact rock[J]. China Journal of Highway andTransport，2004，17(3)：20-24.(in Chinese))
[2]	许明，唐树名，李强，等. 单锚及群锚失效对边坡稳定性影响的模型试验研究[J]. 岩石力学与工程学报，2007，26(增1)：2755-2760.(XUMing，TANG Shuming，LI Qiang，et al. Laboratory model test on investigation of effect of invalidation of single and group anchor cable on slope stability[J]. Chinese Journal of Rock Mechanics andEngineering，2007，26(Supp.1)：2755-2760.(in Chinese))
[3]	韩冬冬，门玉明，胡兆江. 滑坡防治格构式预应力锚杆模型试验研究[J]. 岩土工程学报，2015，37(8)：1375-1380.(HAN Dongdong，MEN Yuming，HU Zhaojiang. Model test on prestressed anchors with lattice beams in landslide protection[J]. Chinese Journal of Geotechnical Engineering，2015，37(8)：1375-1380.(in Chinese))
[4]	陈安敏，顾欣，顾雷雨，等. 锚固边坡楔体稳定性地质力学模型试验研究[J]. 岩石力学与工程学报，2006，25(10)：2092-2101.(CHEN Anming，GU Xin，GU Leiyu，et al. Geomechanical model test research on stability of reinforced wedge-shaped rock slope[J]. Chinese Journal of Rock Mechanics andEngineering，2006，25(10)：2092-2101.(in Chinese))
[5]	徐前卫，丁文其，朱合华，等. 不同锚固方式下软弱破碎岩质边坡渐进破坏特性的模型试验研究[J]. 岩土工程学报，2012，34(6)：1069-1079.(XUQianwei，DING Wenqi，ZHU Hehua，et al. Experimental study on progressive failure properties of weak and fractured rock slopes with different anchoring modes[J]. Chinese Journal of Geotechnical Engineering，2012，34(6)：1069-1079.(in Chinese))
[6]	赵蕴林. 层状页岩边坡群锚加固效应的模型试验探索[J]. 工程勘察，2010，38(10)：23-27.(ZHAO Yunlin. Analysis on the group anchor reinforcing effects in the bedded shale slope through model tests[J].Geotechnical Investigation and Surveying，2010，38(10)：23-27.(in Chinese))
[7]	罗强，李亮. 锚索失效对边坡稳定性影响的模拟试验[J]. 长安大学学报，2011，31(1)：69-73.(LUO Qiang，LI Liang. Model test on influence of anchorage failure to slope stability[J]. Journal of Chang¢an University，2011，31(1)：69-73.(in Chinese))
[8]	DIVI S，CHANDRA D，DAEMEN J. Corrosion susceptibility of potential rock bolts in aerated multi-ionic simulated concentrated water[J]. Tunnelling and Underground Space Technology，2011，26(1)：124-129.
[9]	RAHMAN M S，DIVI S，CHANDRA D，et al. Effect of different salts on the corrosion properties of friction type A607 steel rock bolt in simulated concentrated water[J]. Tunnelling and Underground Space Technology，2008，23(6)：665-673.
[10]	WANG B，LI Z，HE C，et al. Durability of multiple-anticorrosive bolts in a corrosive environment[J]. Praktische Metallographie，2014，51(6)：426-450.
[11]	任爱武，汪彦枢，樊海柱，等. 预应力锚索砂浆包裹体20年夹层未凝现象及其成因初探[J]. 岩石力学与工程学报，2014，33(增2)：3724-3729.(REN Aiwu，WANG Yanshu，FAN Haizhu，et al. A phenomenon of anchorage grout interlayer without solidification in twenty years and its reasons analysis[J]. Chinese Journal of Rock Mechanics andEngineering，2014，33(Supp.2)：3724-3729.(in Chinese))
[12]	任爱武，王琼，彭林军，等. 服役20年预应力锚索耐蚀性能研究[J]. 中国水利水电科学研究院学报，2014，12(4)：410-413.(REN Aiwu，WANG Qiong，PENG Linjun，et al. Study on corrosion resistance performance of servicetwenty years anchor cable[J]. Journal of China Institute of Water Resources and Hydropower Research，2014，12(4)：410-413.(in Chinese))
[13]	JIANG S H，LI D Q，ZHANG L M，et al. Time-dependent system reliability of anchored rock slopes considering rock bolt corrosion effect[J]. Engineering Geology，2014，175(12)：1-8.
[14]	李聪，朱杰兵，汪斌，等. 顺层边坡不同开挖锚固过程力学响应模型试验[J]. 地下空间与工程学报，2017，13(1)：271-278.(LI Cong，ZHU Jiebing，WANG Bin，et al. Model tests for mechanical respond of bedding rock during different excavation and anchoring process[J]. Chinese Journal of Underground Space and Engineering，2017，13(1)：271-278.(in Chinese))
[15]	STERN M，GEABY A L. Electrochemical polarization[J]. Journal of the Electrochemical Society，1957，104(1)：55-57.
[16]	李聪，朱杰兵，汪斌，等. 腐蚀环境下预应力锚筋的耐久性试验研究[J]. 岩石力学与工程学报，2015，34(增1)：3356-3364.(LI Cong，ZHU Jiebing，WANG Bin，et al. Durability test study of prestressed anchor bar in corrosion environment[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：3356-3364. (in Chinese))