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| Study on shear mechanical properties of sawtooth structure with different water cement ratios grouting |
| ZHAO Jun1，2，3，FANG Yue1，4，YAN Siquan 5，ZENG Zhiquan 6，QIU Shili4 |
| (1. School of Civil Engineering and Architecture，Anhui University of Science and Technology，huainan，Anhui 232000，China；2. Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering，Guilin，Guangxi 541004，China；3. School of Civil Engineering，Jiangxi University of Engineering，Xinyu，Jiangxi 338029，China；4. State Key Laboratory of Rock and Soil Mechanics，Wuhan Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；5. Yellow River Engineering Consulting Co.，Ltd.，Zhengzhou，Henan 450000，China；6. Powerchina Huadong Engineering Corporation Limited，Hangzhou，Zhejiang 310000，China) |
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Abstract In order to solve the problem of large deformation of crushed surrounding rock，grouting support is generally used as an effective means to prevent engineering disasters. For the artificial sawtooth structure surface，the laboratory direct shear test was carried out for the reinforcement of ungrouting and different water-cement ratio aluminate cement grouting，and the mechanism of grouting reinforcement was revealed. The results show that the grouting support can improve the peak strength，cohesion and interface stiffness of the structural surface. With the increase of water-cement ratio，the shear peak strength decreases under the same normal stress. With the increase of water-cement ratio，the cohesion of interface decreases. Interface failure forms：the sawtooth is composed of different relief angles. In the case of shear failure of the ungrouting interface，the modes are shear，wear，slope climbing and gnawing coupling effects. When shear failure occurs at the interface after grouting，the curve fluctuation amplitude is large after the peak strength，and the failure is transformed from failure of bonding force to failure of slip. The characteristics of grouting slip failure are similar to those of ungrouting interface failure. The normal displacement and shear displacement curves show that the ungrouting structural surface is mainly dilatancy，and the grouting structural surface shows the characteristics of first shrinking and then dilatancy.
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| [1] 韩立军，宗义江，韩贵雷，等. 岩石结构面注浆加固抗剪特性试验研究[J]. 岩土力学，2011，32(9)：2 570–2 576.(HAN Lijun， ZONG Yijiang，HAN Guilei，et al. Experimental study on shear characteristics of grouting reinforcement of rock structural surface[J]. Rock and Soil Mechanics，2011，32(9)：2 570–2 576.(in Chinese))
[2] 王 贺，高永涛，金爱兵，等. 节理岩体刚度参数选取与三维离散元模拟[J]. 岩石力学与工程学报，2014，33(增1)：2 894–2 900.(WANG He，GAO Yongtao，JIN Aibing，et al. Selection of stiffness parameters of jointed rock mass and three-dimensional discrete element simulation[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.1)：2 894–2 900.(in Chinese))
[3] 程立朝，许 江，冯 丹，等. 法向应力对岩石剪切裂纹演化与贯通机理的影响[J]. 采矿与安全工程学报，2016，33(4)：741–746.(CHENG Lichao，XU Jiang，FENG Dan，et al. The influence of normal stress on rock shear crack evolution and penetration mechanism[J]. Journal of Mining and Safety Engineering，2016，33(4)：741–746.(in Chinese))
[4] 黄 达，雷 鹏. 贯通型锯齿状岩体结构面剪切变形及强度特征[J]. 煤炭学报，2014，39(7)：1 229–1 237.(HUANG Da，LEI Peng. Shear deformation and strength characteristics of the structural plane of the through-type sawtooth rock mass[J]. Journal of China Coal Society，2014，39(7)：1 229–1 237.(in Chinese))
[5] ZHANG Q，LI Y，WU C，et al. Stress-related changes of the steady state creep during shear deformation of synthetic rock joints with various roughness[J]. Géotechnique Letters，2019，9(1)：1–24.
[6] 孙盛玥，李迎春，唐春安，等. 天然岩石节理双阶粗糙度分形特征研究[J]. 岩石力学与工程学报，2019，38(12)：2 502–2 511.(SUN Shengyue，LI Yingchun，TANG Chun?an，et al. Study on the fractal characteristics of two–stage roughness of natural rock joints[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(12)：2 502–2 511.(in Chinese))
[7] 崔国建，张传庆，韩华超，等. CNL及CNS条件下结构面剪切特性试验研究[J]. 岩石力学与工程学报，2019，38(增2)：3 384–3 392.(CUI Guojian，ZHANG Chuanqing，HAN Huachao，et al. Experimental study on shear characteristics of structural planes under CNL and CNS conditions[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.2)：3 384–3 392.(in Chinese))
[8] 张传庆，崔国建，周 辉，等. 锚杆杆体–砂浆界面剪切力学特性试验研究[J]. 岩石力学与工程学报，2018，37(4)：820–828.(ZHANG Chuanqing，CUI Guojian，ZHOU Hui，et al. Experimental study on shear properties of bolt body–mortar interface[J]. Chinese Journal of Rock Mechanics and Engineering， 2018，37(4)：820–828.(in Chinese))
[9] 崔国建，张传庆，刘立鹏，等. 锚杆杆体–砂浆界面力学特性的剪切速率效应研究[J]. 岩土力学，2018，39(增1)：284–290.(CUI Guojian，ZHANG Chuanqing，LIU Lipeng，et al. Study on the shear rate effect of the mechanical properties of the bolt body–mortar interface[J]. Rock and Soil Mechanics，2018，39(Supp.1)：284–290.(in Chinese))
[10] 郑 卓，李术才，刘人太，等. 注浆加固后岩体单一界面抗剪强度[J]. 岩石力学与工程学报，2016，35(增2)：3 915–3 922.(ZHENG Zhuo，LI Shucai，LIU Rentai，et al. Single interface shear strength of rock mass after grouting reinforcement[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(Supp.2)：3 915–3 922.(in Chinese))
[11] 王晓晨，李术才，刘人太，等.锯齿结构面注浆剪切特性研究[J].地下空间与工程学报，2016，12(增2)：438–444.(WANG Xiaochen，LI Shucai，LIU Rentai，et al. Study on grouting and shearing characteristics of sawtooth structure surface[J]. Chinese Journal of Underground Space and Engineering，2016，12(Supp.2)：438–444.(in Chinese))
[12] 刘泉声，雷广峰，卢超波，等. 注浆加固对岩体裂隙力学性质影响的试验研究[J]. 岩石力学与工程学报，2017，36(增1)：3 140–3 147.(LIU Quansheng，LEI Guangfeng，LU Chaobo，et al. Experimental study on the influence of grouting reinforcement on the mechanical properties of rock mass cracks[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(Supp.1)：3 140–3 147.(in Chinese))
[13] 唐雯钰，林 杭. 不同锯齿高度对软弱结构面剪切特性的影响[J].中南大学学报：自然科学版，2017，48(5)：1 300–1 307.(TANG Wenyu，LIN Hang. The influence of different serration heights on the shear characteristics of weak structural planes[J]. Journal of Central South University：Natural Science，2017，48(5)：1 300–1 307.(in Chinese))
[14] 陆银龙，贺梦奇，李文帅，等. 岩石结构面注浆加固微观力学机制与浆–岩黏结界面结构优化[J/OL]. 岩石力学与工程学报，2020，39(9)：1 808–1 818.(LU Yinlong，HE Mengqi，LI Wenshuai，et al. Micromechanical mechanism of grouting reinforcement of rock structural surface and optimization of mortar–rock bonding interface structure[J/OL]. Chinese Journal of Rock Mechanics and Engineering，2020，39(9)：1 808–1 818.(in Chinese))
[15] 肖卫国，兑关锁，朱玉萍，等. 充填单节理岩体本构模型研究[J]. 岩石力学与工程学报，2010，29(增2)：3 463–3 468.(XIAO Weiguo，DUI Guansuo，ZHU Yuping，et al. Study on the constitutive model of filled single–joint rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.2)：3 463–3 468.(in Chinese))
[16] 葛修润. 岩体中节理面、软弱夹层等的力学性质和模拟分析方法(一)[J]. 岩土力学，1979，12(1)：54–75.(GE Xiurun. Mechanical properties and simulation analysis methods of joint planes and weak interlayers in rock mass(1)[J]. Rock and Soil Mechanics，1979，12(1)：54–75.(in Chinese))
[17] 孙辅庭，佘成学，万利台. 充填水泥浆岩石节理峰值剪切强度模型[J]. 岩石力学与工程学报，2014，33(12)：2 481–2 489.(SUN Futing，SHE Chengxue，WAN Litai. Peak shear strength model of rock joints filled with cement slurry[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(12)：2 481–2 489.(in Chinese))
[18] 王 志，李 龙，王朝雅. 含裂隙类岩石注浆加固后破坏试验研究[J]. 中南大学学报：自然科学版，2018，49(4)：957–963.(WANG Zhi，LI Long，WANG Chaoya. Experimental research on failure of rock containing fissures after grouting and reinforcement[J]. Journal of Central South University：Natural Science，2018，49(4)：957–963.(in Chinese))
[19] 李召峰，李术才，刘人太，等. 富水破碎岩体注浆加固材料试验研究与应用[J]. 岩土力学，2016，37(7)：1 937–1 946.(LI Zhaofeng，LI Shucai，LIU Rentai，et al. Experimental research and application of grouting reinforcement materials for water–rich broken rock mass[J]. Rock and Soil Mechanics，2016，37(7)：1 937–1 946.(in Chinese))
[20] LI Y C，WU W，TANG C A，et al. Predicting the shear characteristics of rock joints with asperity degradation and debris backfilling under cyclic loading conditions[J]. International Journal of Rock Mechanics and Mining Sciences，2019，120(8)：108–118.
[21] TAE-HYUK K，EUN-SOO H，GYE-CHUN C. Shear behavior of rectangular–shaped asperities in rock joints[J]. KSCE Journal of Civil Engineering，2010，14(3)：323–332. |
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2021, Vol. 40 
