水岩化学作用对砂岩力学特性影响的试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (608 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究水岩化学作用对砂岩力学特性的影响，将桃源水电站的红砂岩加工成标准圆柱形试样，对其进行不同化学溶液作用下的腐蚀试验，获得红砂岩化学腐蚀过程中相对质量变化规律，同时测量记录各化学溶液pH值。利用岩石三轴测试系统对各种化学溶液浸泡后的红砂岩进行三轴压缩试验，探讨不同的化学溶液对红砂岩力学特性的腐蚀效应，获得水化学溶液对红砂岩强度和变形特性的影响规律。结果表明，试样质量的变化和化学溶液性质有关，试样相对质量变化存在明显差异。pH=13的化学溶液pH值随时间的增长有小幅度下降，其余化学溶液pH值随时间增长均趋于弱碱性(pH≈7.9)。根据溶液pH值的变化、试样相对质量的变化，分析化学溶液对岩石的腐蚀程度。三轴压缩试验结果表明，不同化学溶液对红砂岩力学性质的影响不同。离子成分及pH值均对红砂岩力学特性产生较大影响，各种化学溶液腐蚀后岩石的峰值强度、残余强度、弹性模量均有不同程度的下降。室内试验的结果可为构建红砂岩化学腐蚀条件下本构模型提供重要的试验资料。

	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 ：岩石力学, 砂岩, 水岩化学作用, 腐蚀机制, 力学特性, 应力&ndash, 应变曲线

Abstract：In order to investigate the influence of water-rock chemical interaction on the mechanical characteristics of sandstone，the corrosion tests are firstly carried out on the standard specimens of red sandstone taken from the site of Taoyuan hydropower project. The variations of relative qualities of samples with time are obtained as well as the variations of pH values of chemical solutions. Then，a rock triaxial testing machine is used to conduct triaxial compression tests on the red sandstones specimens soaked in six chemical solutions. The effect of chemical solutions with different pH values and ion components on the mechanical characteristics of red sandstones is studied and the influences of chemical solution on strength and deformation characteristics of red sandstones are investigated. The results indicate that the change in rock mass is related to chemical solution. There are obvious differences between different chemical solutions. As to the pH values of chemical solutions，the pH value of solution with the initial pH value equal to 13 decreases very slightly. But the pH values of other solutions finally tend to reach a regular value about 7.9. The corrosion degree is evaluated by measuring the variation of pH values for all solutions and the variation of mass of soaked specimens. According to the results of triaxial compression tests，the mechanical characteristics of rocks are related to the kinds of the chemical solutions. The pH values and ion components have a great impact on the mechanical characteristics of the red sandstone. The peak strength，residual strength and elastic modulus of the rock after corrosion are likely to decrease to a certain degree for different solutions. The failure modes of the samples under different chemical erosions with the same confining pressure have no significant discrepancy. Results obtained from laboratory tests could provide experimental data for the constitutive modelling of sandstone under chemical corrosion.

Key words： rock mechanics sandstone water-rock chemical interaction corrosion mechanism mechanical characteristics stress-strain curve

收稿日期: 2012-04-16

引用本文:

王伟1，2，刘桃根1，2，吕军1，2，王如宾1，2，徐卫亚1，2，翦波3. 水岩化学作用对砂岩力学特性影响的试验研究[J]. 岩石力学与工程学报, 2012, 31(s2): 3607-3617.
WANG Wei1，2，LIU Taogen1，2，LU Jun1，2，WANG Rubin1，2，XU Weiya1，2，JIAN Bo3. EXPERIMENTAL STUDY OF INFLUENCE OF WATER-ROCK CHEMICAL INTERACTION ON MECHANICAL CHARACTERISTICS OF SANDSTONE. , 2012, 31(s2): 3607-3617.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/Is2/3607

[1] MILLARD A，REJEB A，CHIJIMATSU M，et al. Numerical study of the THM effects on the near-field safety of a hypothetical nuclear waste repository-BMT1 of the DECOVALEX Ⅲ Project part 2：effects of THM coupling in continuous and homogeneous rock[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(5/6)：731–744. [2] TSANG C F，JING L，STEPHANSSON O，et al. The DECOVALEX Ⅲ project：a summary of activities and lessons learned[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(5/6)：593–610. [3] PAN P Z，FENG X T，ZHOU H. Simulation of rock fracturing process under coupled hydro-mechanical effect using a solid cellular automaton[C]// Proceedings of the 2nd International Conference on Coupled T-H-M-C Processes in Geo-systems：Fundamentals，Modeling，Experiments，and Applications. Nanjing：[s.n.]，2006：503–508. [4] HUDSON J A，STEPHANSSON O，ANDERSSON J，et al. Coupled T-H-M issues relating to radioactive waste repository design and performance[J]. International Journal of Rock Mechanics and Mining Sciences，2001，38(1)：143–161. [5] HART R D，JOHN C M S. Formulation of a fully-coupled thermal-mechanical-fluid model for nonlinear geologic systems[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1986，23(3)：213–224. [6] 刘建，李鹏，乔丽萍，等. 砂岩蠕变特性的水物理化学作用效应试验研究[J]. 岩石力学与工程学报，2008，27(12)：2 540–2 550. (LIU Jian，LI Peng，QIAO Liping，et al. Experimental research on creep behavior and mechanism of sandstones with hydro- physico- chemical effects[J]. International Journal of Rock Mechanics and Mining Sciences，2008，27(12)：2 540–2 550.(in Chinese)) [7] 刘建，乔丽萍，李鹏. 砂岩弹塑性力学特性的水物理化学作用效应–试验研究与本构模型[J]. 岩石力学与工程学报，2009，28(1)：20–29.(LIU Jian，QIAO Liping，LI Peng. Experimental studies and constitutive model of elastoplastic mechanical behaviors of sandstone with hydro-physicochemical influencing effects[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(1)：20–29.(in Chinese)) [8] 李鹏，刘建，李国和，等. 水化学作用对砂岩抗剪强度特性影响效应研究[J]. 岩土力学，2011，32(2)：380–386.(LI Peng，LIU Jian，LI Guohe，et al. Experimental study for shear strength characteristics of sandstone under water-rock interaction effects[J]. Rock and Soil Mechanics，2011，32(2)：380–386.(in Chinese)) [9] 丁梧秀，冯夏庭. 化学腐蚀下灰岩力学效应的实验研究[J]. 岩石力学与工程学报，2004，23(21)：3 571–3 576.(DING Wuxiu，FENG Xiating. Testing study on mechanical effect for limestone under chemical erosion[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(21)：3 571–3 576.(in Chinese)) [10] 丁梧秀，冯夏庭. 灰岩细观结构的化学损伤效应及化学损伤定量化研究方法探讨[J]. 岩石力学与工程学报，2005，24(8)：1 283–1 288. (DING Wuxiu，FENG Xiating. Study on chemical damage effect and quantitative analysis method of mesostructure of limestone[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(8)：1 283–1 288. (in Chinese)) [11] LI N，ZHU Y M，SU B，et al. A chemical damage model of sandstone in acid solution[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40(2)：243–249. [12] 汤连生，张鹏程，王思敬. 水–岩化学作用的岩石宏观力学效应的试验研究[J]. 岩石力学与工程学报，2002，21(4)：526–531.(TANG Liansheng，ZHANG Pengcheng，WANG Sijing. Testing study on macroscopic mechanics effect of chemical action of water on rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(4)：526–531.(in Chinese)) [13] 汤连生，王思敬. 岩石水化学损伤的机制及量化方法探讨[J]. 岩石力学与工程学报，2002，21(3)：314–319.(TANG Liansheng，WANG Sijing. Analysis of mechanism and quantitative methods of chemical damage in water-rock interaction[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(3)：314–319.(in Chinese)) [14] 汤连生，王思敬. 水–岩化学作用对岩体变形破坏力学效应研究进展[J]. 地球科学进展，1999，14(5)：433–439.(TANG Liansheng，WANG Sijing. Progress in the study on mechanical effect of the chemical action of water-rock on deformation and failure of rocks[J]. Advances in Earth Sciences，1999，14(5)：433–439.(in Chinese)) [15] 汤连生，张鹏程，王思敬. 水–岩化学作用之岩石断裂力学效应的试验研究[J]. 岩石力学与工程学报，2002，21(6)：822–827.(TANG Liansheng，ZHANG Pengcheng，WANG Sijing. Testing study on effects of chemical action of aqueous solution on crack propagation in rock[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(6)：822–827.(in Chinese)) [16] FENG X T，DING W X. Experimental study of limestone micro-fracturing under a coupled stress，fluid flow and changing chemical environment[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44：437–448. [17] FENG X T，DING W X，ZHANG D X. Multi-crack interaction in limestone subject to stress and flow of chemical solutions[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(3)：437–448. [18] 鲁祖德，丁梧秀，冯夏庭，等. 裂隙岩石的应力–水流–化学耦合作用试验研究[J]. 岩石力学与工程学报，2008，27(4)：796–804. (LU Zude，DING Wuxiu，FENG Xiating，et al. Experimental study on mechanical-hydro-chemical coupling process in cracked rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：796–804.(in Chinese)) [19] 冯夏庭，丁梧秀. 应力–水流–化学耦合下岩石破裂全过程的细观力学试验[J]. 岩石力学与工程学报，2005，24(9)：1 465–1 473. (FENG Xiating，DING Wuxiu. Mesomechanical experiment of micro- fracturing process of rock under coupled mechanical hydrological chemical environment[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(9)：1 465–1 473.(in Chinese)) [20] FENG X T，CHENG S L，LI S. Study on nonlinear damage localization process of rocks under water chemical corrosion[C]// Proceedings of the 10th Congress of the IRSM Technology Roadmap for Rock Mechanics. [S.l]：[s.n.]，2003：325–327. [21] 冯夏庭，潘鹏志，丁梧秀，等. 结晶岩开挖损伤区的温度–水流–应力–化学耦合研究[J]. 岩石力学与工程学报，2008，27(4)：656–663.(FENG Xiating，PAN Pengzhi，DING Wuxiu，et al. Thermo- hydro-mechano-chemical coupling studies on excavation damage zone in crystalline rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(4)：656–663.(in Chinese)) [22] CORKUM A G，MARTIN C D. The mechanical behavior of weak mudstone(Opalinus clay) at low stresses[J]. International Journal of Rock Mechanics and Mining Sciences，2007，44(2)：196–209. [23] KAWAKATA H，CHO A，YANAGIDANI T，et al. The observations of saulting in westerly granite under triaxial compression by X-Ray CT scan[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(3/4)：151–161. [24] PIETRUSZCZAK S，LYDZBA D，SHAO J F. Modeling of deformation response and chemo-mechanical coupling in chalk[J]. International Journal for Numerical and Analytical Methods in Geomechanics，2006，30(10)：997–1 018. [25] TARON J S，ELSWORTH D，MIN K B. Numerical simulation of thermal-hydrologic-mechanical-chemical processes in deformable，fractured porous media[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(5)：842–854. [26] NGUYEN V H，NEDJAR B，TORRENTI J M. Chemo-mechanical coupling behavior of leached concrete part II：modeling[J]. Nuclear Engineering and Design，2007，273：2 090–2 097. [27] GAWIN D，PESAVENTO F，SCHREFLER B. Modeling of hygro-thermal behavior of concrete at high temperature with thermo-chemical and mechanical material degradation[J]. Computer Methods in Applied Mechanics and Engineering，2003，192(13/14)：1 731–1 771. [28] XIE S Y，SHAO J F，BURLION N. Experimental study of mechanical behavior of cement paste under compressive stress and chemical degradation[J]. Cement and Concrete Research，2008，38(12)：1 416– 1 423. [29] 中华人民共和国行业标准编写组. SL264—2001水利水电工程岩石试验规程[S]. 北京：中国水利水电出版社，2001.(The Professional Standards Compilation Group of People?s Republic of China. SL264—2001 Specifications for rock tests in water conservancy and hydroelectric engineering[S]. Beijing：China Water Power Press，2001.(in Chinese)) [30] ULUSAY R，HUDSON J A. The complete ISRM suggested methods for rock characterization，testing and monitoring：1 974–2 006[M]. Ankara，Turkey：Compilation Arranged by the ISRM Turkish National Group，2007. [31] 李汶国，张晓鹏，钟玉梅. 长石砂岩次生溶孔的形成机制[J]. 石油与天然气地质，2005，26(2)：220–224.(LI Wenguo，ZHANG Xiaopeng，ZHONG Yumei. Formation mechanism of secondary dissolved pores in arcose[J]. Oil and Gas Geology，2005，26(2)：220–224.(in Chinese)) [32] 乔丽萍. 砂岩弹塑性及蠕变特性的谁无理化学作用效应试验与本构研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2008.(QIAO Liping. Experimental-theoretical-numerical studies of elasto-plastic and creep property of sandstone with hydro- physico-chemical influencing effects[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2008.(in Chinese))