硫酸盐腐蚀锚索结构锚固性能退化规律试验研究

doi:10.13722/j.cnki.jrme.2014.1214

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (870 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要硫酸盐腐蚀是锚索结构长期锚固性能退化的原因之一。为模拟围岩约束条件下硫酸盐对锚索浆体的腐蚀及腐蚀后的锚固受力过程，设计外包钢管圆柱形素水泥浆中置钢绞线短黏结试件并进行长期硫酸盐干湿循环腐蚀，然后通过静力拔出试验观察黏结受力过程，获取黏结滑移曲线，定义锚固特征参数。结果表明：围岩约束作用对腐蚀过程及拔出受力过程产生显著影响，腐蚀引起的物理损伤得以阻止，化学损伤成为主要腐蚀损伤方式；拔出破坏特征为：浆体螺旋肋逐渐被磨平，索体最终被抽出；全程黏结滑移曲线由初期极速上升段、中后期锯齿形上升段及末期快速下降段组成；当围岩变形模量增大时，设计允许滑移、设计强度、极限滑移以及极限强度均随之增大；当浆体腐蚀程度增大时，设计强度、极限滑移以及极限强度随之降低，而设计允许滑移则因浆体模量的退化而随之增大。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：岩土工程, 锚索, 耐久性, 硫酸盐腐蚀, 围岩约束, 锚固特征参数

Abstract：Sulfate corrosion is one of the reasons why anchor cables undergo the degradation of long-term anchoring capacity. To simulate the sulfate corrosion to the host concrete of anchor cables and the anchoring behavior after corrosion under the restriction of rock，a kind of short-bonded specimen of cylindrical plain cement concrete wrapped by a steel pipe outside and permeated by a steel strand centrally was designed. Then a long-term sulfate corrosion to the specimens in cyclic wetting and drying conditions was conducted. When the corrosion test was completed，a static pull-out test was executed to observe the anchoring process，to obtain the bond-slip curves and to define the characteristic anchoring parameters. The results showed that the restriction of rock had a significant impact on corrosion process and anchoring behavior in pull-out process. The physical damage was prevented and the chemical damage was the main way of corrosion. In the pull-out test，the spiral ribs of concrete were planished gradually and the cable was pulled out finally. The whole bond-slip curve consisted of a sudden rising initially，then a jugged rising and a rapid falling stages finally. When the deformation modulus of rock increased，the allowable design slip，design strength，ultimate slip and ultimate strength increased accordingly. And when the corrosion of the concrete was aggravated，the design strength，ultimate slip and ultimate strength decreased accordingly，while the design slip increased due to the degradation of concrete modulus.

Key words： geotechnical engineering anchor cable durability sulfate attack restriction of embracing rock characteristic anchoring parameters

引用本文:

李富民1，2，刘贞国1，3，陆荣1，璩亚旭1，赵宇1. 硫酸盐腐蚀锚索结构锚固性能退化规律试验研究[J]. 岩石力学与工程学报, 2015, 34(08): 1581-1593.
LI Fumin1，2，LIU Zhenguo1，3，LU Rong1，QU Yaxu1，ZHAO Yu1. EXPERIMENTAL STUDY ON DEGRADATION BEHAVIOR OF ANCHOR CABLES DUE TO SULFATE CORROSION. , 2015, 34(08): 1581-1593.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2014.1214 或 http://www.rockmech.org/CN/Y2015/V34/I08/1581

[1]	赵健，冀文政，肖玲，等. 锚杆耐久性现场试验研究[J]. 岩石力学与工程学报，2006，25(7)：1 377-1 385.(ZHAO Jian，JI Wenzheng，XIAO Ling，et al. In-situ experimental study on anchor durability[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(7)：1 377-1 385.(in Chinese))
[4]	程良奎，韩军，张培文. 岩土锚固工程的长期性能与安全评价[J]. 岩石力学与工程学报，2008，27(5)：865-872.(CHENG Liangkui，HAN Jun，ZHANG Peiwen. Long-term performance and safety assessment of anchorage in geotechnical engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(5)：865-872.(in Chinese))
[5]	CEB-FIP. FIP State of the Art Report：Corrosion and corrosion protection of prestressed ground anchorages[M]. Thomas Telford Publishing，London，1994. " target="_blank">
[7]	ISAO S，MAKOTO Y，TAKAOKA，et al. Corrosion protective property of various covering materials of steels in soil：part 2，evaluation after embedding in soil for 15 years[J]. Nobuhiro Corrosion Engineering，1997，46(4)：251-255. " target="_blank">
[2]	张思峰，宋修广，周健，等. 预应力锚固结构耐久性及其二次加固技术研究[J]. 公路交通科技，2008，25(2)：30-39. (ZHANG Sifeng，SONG Xiuguang，ZHOU Jian，et al. Study on durability and secondary reinforcement technique of prestressed anchorage structures[J]. Journal of Highway and Transportation Research and Development，2008，25(2)：30-39.(in Chinese))
[6]	JURELL G. Investigation into the failure of a prestressed rock anchor[J]. International Water Power and Dam Construction，1985，37(2)：45-47. " target="_blank">
[8]	任爱武，汪彦枢，王玉杰，等. 拉力集中全长黏结型锚索长期耐久性研究[J]. 岩石力学与工程学报，2011，30(3)：493-499.(REN Aiwu，WANG Yanshu，WANG Yujie，et al. Research on durability of concentrated tension and full-bonded anchor cables[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(3)：493-499.(in Chinese))
[10]	汪剑辉，曾宪明，赵强. 多因素耦合腐蚀环境下锚杆腐蚀机制试验研究[J]. 施工技术，2006，35(11)：30-33.(WANG Jianhui，ZENG Xianming，ZHAO Qiang. Experiment study on the corrosion mechanism of anchor rod under condition of several factors[J]. Construction Technology，2006，35(11)：30-33.(in Chinese))
[12]	LI F M，LIU Z G，ZHAO Y，et al. Experimental study on corrosion progress of interior bond section of anchor cables under chloride attack[J]. Construction and Building Materials， 2014，71(11)：344-353. " target="_blank">
[14]	CHAKRAVORTY M，FRANGOPOL D M，MOSHER R L，et al. Time-dependent reliability of rock-anchored structures[J]. Reliability Engineering and System Safety，1995，47(3)：231-236. " target="_blank">
[3]	曾宪明，陈肇元，王靖涛，等. 锚固类结构安全性与耐久性问题探讨[J]. 岩石力学与工程学报，2004，23(13)：2 235-2 242.(ZENG Xianming，CHEN Zhaoyuan，WANG jingtao，et al. Research on safety and durability of bolt and cable-supported structures[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(13)：2 235-2 242.(in Chinese))
[16]	何思明，王全才，罗渝. 钢绞线锈蚀对预应力锚索荷载传递特性的影响[J]. 四川大学学报：工程科学版，2010，42(1)：1-4.(HE Siming，WANG Quancai，LUO Yu. Impact of steel strand corrosion on pre-stressed anchor cable load transfer characteristic[J]. Journal of Sichuan University：Engineering Science Edition，2010，42(1)：1-4. (in Chinese))
[20]	陈庆玉. 硫酸盐作用下砂浆锚杆耐久性试验研究[D]. 重庆：重庆大学土木工程学院，2009.(CHEN Qingyu. Experimental study on durability of bolt under sulfate attack[D]. Chongqing：Thesis of Chongqing University，2009.(in Chinese)) " target="_blank">
[25]	吴庆，袁迎曙，蒋建华，等. 锈蚀钢筋与混凝土黏结机理试验研究[J]. 中国矿业大学学报，2009，38(5)：685-691.(WU Qing，YUAN Yingshu，JIANG Jianhua，et al. Experimental research on the bonding between corroded reinforcement bar and concrete[J]. Journal o f China University of Mining and Technology，2009，38(5)：685-691.(in Chinese))
[9]	余万超，韩道均，唐树名. 预应力锚索腐蚀原理与防腐技术方法初探[J]. 公路交通技术，2007(3)：131-133.(YU Wanchao，HAN Daojun，TANG Shuming. Primary discussion on corrosion principles and anti-corrosion technologies for prestressed anchor cables[J]. Journal of Highway and Transportation Research and Development，2007(3)：131-133.(in Chinese)) " target="_blank">
[11]	GAMBOA E，ATRENS A. Environmental influence on the stress corrosion cracking of rock bolts[J]. Engineering Failure Analysis，2003，10(5)：521-558. " target="_blank">
[13]	郑静，曾辉辉，朱本珍. 腐蚀对锚索力学性能影响的试验研究[J]. 岩石力学与工程学报，2010，29(12)：2 469-2 474.(ZHENG Jing，ZENG Huihui，ZHU Benzhen. Test study of influence of erosion on mechanical behavior of anchor[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(12)：2 469-2 474.(in Chinese))
[15]	JIANG Shuihua，LI Dianqing，ZHANG Limin，et al. Time-dependent system reliability of anchored rock slopes considering rock bolt corrosion effect[J]. Engineering Geology，2014，175：1-8. " target="_blank">
[17]	NEVILLE A. The confused world of sulfate attack on concrete[J]. Cement and Concrete Research，2004，34：1 275-1 296. " target="_blank">
[19]	AL-ROUSAN R，HADDAD R，AL-SA’DI K. Effect of sulfates on bond behavior between carbon fiber reinforced polymer sheets and concrete[J]. Materials and Design，2013，43：237-248. " target="_blank">
[21]	水电水利工程预应力锚索施工规范(DL/T 5083—2010)[S]. 北京：中国电力出版社，2011.(Specification of prestressing tendon construction for hydropower and water resources project(DL/T 5083—2010)[S]. Beijing：China Power Press，2011.(in Chinese)) " target="_blank">
[24]	LI F M，YUAN Y S. Effects of corrosion on bond behavior between steel strand and concrete[J]. Construction and Building Materials，2013，38(1)：413-422. " target="_blank">
[18]	邓德华，刘赞群，SCHUTTER G D E，等. 关于“混凝土硫酸盐结晶破坏”理论的研究进展[J]. 硅酸盐学报，2012，40(2)：175-185.(DENG Dehua，LIU Zanqun，SCHUTTER G DE，et al. Research progress on theory of“sulfate salt weathering on concrete”[J]. Journal of the Chinese Ceramic Society，2012，40(2)：175-185.(in Chinese)) " target="_blank">
[22]	徐高巍，白世伟. 岩体弹性模量尺寸效应的拟合研究[J]. 铜业工程，2006，(3)：17-20，36. " target="_blank">
[23]	普通混凝土长期性能和耐久性能试验方法标准(GB/T50082—2009)[S]. 北京：中国建筑工业出版社，2009.(Standard for test methods of long-term performance and durability of ordinary concrete (GB/T50082—2009)[S]. Beijing：China Architecture and Building Press，2009.(in Chinese)) " target="_blank">