三向高应力状态下深埋大理岩变形特性试验研究

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摘要为获得深部岩体的变形模量，在真三轴试验机上，对中等尺寸大理岩试样进行不同侧压下的变形试验，重点对同一试样进行多个等侧压和不等侧压的对比试验。试验表明：(1) 大理岩的变形模量与侧压之间具有显著的非线性关系，且当侧压增大至30 MPa后，变形模量不再随着侧压的增大而显著增大，该侧压值反映了大理岩脱离母岩后的弱化程度；(2) 建立大理岩的变形模量与三向应力之间的关系，用试样所对应部位地应力值计算出深埋大理岩的变形模量为66.7～68.2 GPa；(3) 变形模量计算值与采用其他间接方法获得的变形模量相当，并显著高于常规室内和现场变形试验值。由此说明，深部岩体在释放应力后容易使其力学性质弱化，弱化程度与所处的地应力大小有关。该方法对研究极高～高地应力环境下深部岩体及偏应力较大的边坡的变形特征具有重大意义。

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关键词 ：岩石力学, 三向应力状态, 高应力, 深埋大理岩, 变形模量

Abstract：To obtain the deformation modulus of deep rockmass，deformation tests under different lateral pressures are carried out for medium size marble samples using the true triaxial test machine. The comparison tests for the same sample under the same lateral pressure and different lateral pressures are conducted emphatically. The tests indicate that：(1) There is significant nonlinear relationship between deformation modulus and lateral pressure of the marble. The deformation modulus of marble no longer increases with the increase of the lateral pressure after the lateral pressure reaches 30 MPa；and the lateral pressure reflects the weakening degree of marble when the marble breaks away from parent rock. (2) Then，the relationship between deformation modulus and three-dimensional stresses of marble is obtained. Based on the value of in-situ stress at the site of the sample，the deep marble deformation modulus of 66.7–68.2 GPa is calculated. (3) The calculated value of deformation modulus coincides well with the value obtained by other indirect methods；and it is significantly higher than values of conventional indoor and field tests. The above results indicate that the mechanical properties of deep rock mass will be weakened after stress relief；and the weakening degree is related to the in-situ stress. This method is of great importance for researching deformation characteristics of rock mass under high in-situ and extremely high stress and slopes with larger deviatoric stress.

Key words： rock mechanics three-dimensional stress state high stress deep marble deformation modulus

收稿日期: 2013-06-03

引用本文:

李维树1，单治钢2，刘洋1，郭喜峰1，贺林林3. 三向高应力状态下深埋大理岩变形特性试验研究[J]. 岩石力学与工程学报, 2013, 32(10): 2015-2021.
LI Weishu1，SHAN Zhigang2，LIU Yang1，GUO Xifeng1，HE Linlin3. EXPERIMENTAL STUDY OF DEFORMATION CHARACTERISTICS OF DEEP MARBLE UNDER THREE-DIMENSIONAL HIGH STRESS. , 2013, 32(10): 2015-2021.

链接本文:

http://www.rockmech.org/CN/Y2013/V32/I10/2015

[1]	于震平，李铁汉. 工程岩体物理场[J]. 现代地质，1997，11(3)：347-353.(YU Zhenping，LI Tiehan. Physical field of engineering rock masses[J]. Geoscience，1997，11(3)：347-353.(in Chinese)) " target="_blank">
[2]	于震平，李铁汉. 工作应力状态下岩体变形模量的研究[J]. 岩石力学与工程学报，2005，24(10)：1 662-1 666.(YU Zhenping，LI Tiehan. Study on deformation modulus of rock mass in working stress state[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(10)：1 662-1 666.(in Chinese)) " target="_blank">
[4]	李迪，张保军，张漫，等. 岩体变形试验与分层弹模计算[M].湖北：湖北科学技术出版社，2005：84-123.(LI Di，ZHANG Baojun，ZHANG Man，et al. Calculations on elastic modulus of each rock formation under in-situ plate bearing tests[M]. Wuhan：Hubei Science and Technology Press，2005：84-123.(in Chinese)) " target="_blank">
[6]	马鹏，赵国平，张永永，等. 锦屏超高压岩体水压致裂法地应力测试系统研制与应用[C]// 第8次全国岩石力学与工程试验及测试技术学术交流会论文集. 长春：[s. n.]，2012：249-253.(MA Peng，ZHAO Guoping，ZHANG Yongyong，et al. The preparation and application of ultra-high pressure hydrofracturing geostress measurement system rockmass[C]// Proceedings of Academic Communication Conference of the Eighth National Rock Mechanics and Engineering Test and Measurement Technology. Changchun：[s. n.]，2012：249-253.(in Chinese)) " target="_blank">
[8]	李维树，黄书岭，丁秀丽，等. 中尺寸岩样真三轴试验系统研制与应用[J]. 岩石力学与工程学报，2012，31(11)：2 197-2 203.(LI Weishu，HUANG Shuling，DING Xiuli，et al. Development of true tri-axial experiment system for middle sized rock sampled from high geo-stress region and its applications[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(11)：124-134.(in Chinese)) " target="_blank">
[9]	李维树. 锦屏二级引水隧洞高地应力条件下岩体力学参数研究之分报告二：岩体及结构面原位试验成果报告[R]. 武汉：长江科学院，2012.(LI Weishu. Research report on rock mass mechanical parameters under high ground stress of diversion tunnel in Jinping II hydropower station，part II：results report of in-situ test of rock mass and structure plane[R]. Wuhan：Yangtze River Scientific Research Institute，2012.(in Chinese)) " target="_blank">
[3]	熊诗湖，周火明. 三峡永久船闸边坡岩体在复杂应力路径下的变形特性[J]. 岩石力学与工程学报，2006，25(增2)：3 636-3 641. (XIONG Shihu，ZHOU Huoming. Deformation properties of rock mass of TGP permanent ship lock slopes under complex stress paths[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 636-3 641.(in Chinese)) " target="_blank">
[5]	LI W S，WU A Q，ZHOU H M，et al. Brief introduction to rock mass deformation test equipment and automatic servo system under high stress[C]// The 2nd International Conference on Mechanic Automation and Control Engineering. [S. l.]：[s. n.]，2011：4 806-4 811. " target="_blank">
[7]	葛修润，侯明勋. 三维地应力BWSRM测量新方法及其测井机器人在重大工程中的应用[J]. 岩石力学与工程学报，2011，30(11)： 2 161-2 180.(GE Xiurun，HOU Mingxun. A new 3D in-situ rock stress measuring method：borehole wall stress relief method(BWSRM) and development of geostress measuring instrument based on BWSRM and its primary applications to engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(11)：2 161-2 180.(in Chinese)) " target="_blank">
[10]	汪斌. 锦屏二级引水隧洞高地应力条件下岩体力学参数研究之分报告一：室内岩石力学试验成果报告[R]. 武汉：长江科学院，2012.(WANG Bin. Research report on rock mass mechanical parameters under high ground stress of diversion tunnel in Jinping II hydropower station，part I：results report of indoor rock mechanics test[R]. Wuhan：Yangtze River Scientific Research Institute，2012.(in Chinese)) " target="_blank">