圆形洞室围岩破坏模式模型试验研究

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摘要为系统研究连续介质条件下隧道围岩的破坏模式和规律，采用模型试验，针对黏性材料和砂性材料2种典型地质材料进行研究。黏性材料由重晶石、石英砂和凡士林按一定配比组成，砂性材料考虑单一石英砂材料和石英砂与重晶石混合2种形式。利用压力盒、位移计、非接触监测系统等监测隧道开挖、加载过程中围岩应力和变形情况。对黏性材料而言，在逐级加载过程中表现出先洞室两侧剪切滑移，后拱顶塌落的二次破坏模式，通过位移和应力的监测可知，随着外部荷载的增大，洞室上方塑性区范围增加，而进入塑性状态后，围岩变形速率加快。对砂性材料而言，单一石英砂材料在开挖后围岩不具有自稳能力；而采用石英砂和重晶石混合后的材料，由于颗粒级配较好，材料具有一定的自锁能力，洞室开挖后可以保持稳定，随着逐级加载，洞室顶部首先出现二次抛物线型塌落拱，然后拱脚位置向洞室两侧移动，当其发展到水平中轴线处达到稳定，此时塌落拱滑裂面与普氏拱理论类似。模型试验揭示连续介质条件下隧道围岩的破坏模式，对隧道支护参数的确定具有重要意义。

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关键词 ：隧道工程, 模型试验, 相似材料, 围岩破坏模式

Abstract：For studying the deformation and failure modes of tunnel surrounding rock systematically under different continuum media，model tests have been performed on artificial cohesive material and artificial sandy materials. Barite powder，quartz sand and vaseline are the key ingredients of the cohesive similar material. Two types of sandy material made of quartz，and quartz+barite powder are tested respectively. Pressure cell，displacement gauge and non-contact precision measurement are used to monitor the surrounding rock response after excavation，the stress and deformation of the surrounding rock induced by tunnelling and further loading. For cohesive material in the process of step loading，failure first occurs on both sides of the tunnel and then at tunnel crown. According to the displacement and stress monitoring results，in response to the increase in load，the size of plastic zone increases as well. It also reveals that once the plastic zone develops，the rate of deformation in the tunnel surrounding rock will increase. Tunnel excavation in the sandy quartz material does not possess self-stability. However，for sandy material made of quartz and barite，the tunnel remains stable after excavation. For this mixture material，with the increase in applied pressure，failure arch first appears at the tunnel crown which follows the shape of a parabola curve. The arch foot then moves towards the sides of the tunnel. Stability is achieved when it reaches the central axis of the tunnel；at this point，the collapse arch sliding surface is similar to the Platts theory. This series of model tests，which allow the observation of the deformation failure modes for tunnel under different continuum media，provide significant information for the determination of tunnel supporting parameters.

Key words： tunnelling engineering model test similar material failure mode of surrounding rock

收稿日期: 2010-11-05

引用本文:

房倩1，2，张顶立1，王毅远2，李鹏飞1，李倩倩1. 圆形洞室围岩破坏模式模型试验研究[J]. 岩石力学与工程学报, 2011, 30(3): 564-571.
FANG Qian1，2，ZHANG Dingli1，WONG Louis Ngai Yuen2，LI Pengfei1，LI Qianqian1. MODEL TEST STUDY OF FAILURE MODES OF SURROUNDING ROCK FOR CIRCULAR CAVERNS. , 2011, 30(3): 564-571.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I3/564

[1]	张强勇，李术才，尤春安. 新型岩土地质力学模型试验系统的研制及应用[J]. 土木工程学报，2006，39(12)：100-103，107.(ZHANG Qiangyong，LI Shucai，YOU Chun?an. On geotechnical-geomechanics model test system and its application[J]. China Civil Engineering Journal，2006，39(12)：100-103，107.(in Chinese)) " target="_blank">
[4]	韩伯鲤，陈霞龄，宋一乐，等. 岩体相似材料的研究[J]. 武汉水利电力大学学报，1997，30(2)：7-10.(HAN Boli，CHEN Xialing，SONG Yile，et al. Research on similar material of rock mass[J]. Journal of Wuhan University of Hydraulic and Electric Engineering，1997，30(2)：7-10.(in Chinese)) " target="_blank">
[5]	LEE C J，WU B R，CHEN H T，et al. Tunnel stability and arching effects during tunneling in soft clayey soil[J]. Tunnelling and Underground Space Technology，2006，21(2)：119-132. " target="_blank">
[7]	陈安敏，顾金才，沈俊，等. 岩土工程多功能模拟试验装置的研制及应用[J]. 岩石力学与工程学报，2004，23(3)：372-378.(CHEN Anmin，GU Jincai，SHEN Jun，et al. Development and application of multifunctional apparatus for geotechnical engineering model tests[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(3)：372-378.(in Chinese))
[10]	LEE Y J，YOO C S. Behaviour of a bored tunnel adjacent to a line of loaded piles[J]. Tunnelling and Underground Space Technology，2006，21(3-4)：370-378. " target="_blank">
[13]	徐干成，白洪才，郑颖人，等. 地下工程支护结构[M]. 北京：中国水利水电出版社，2001.(XU Gancheng，BAI Hongcai，ZHENG Yingren，et al. Supporting structure of underground engineering[M]. Beijing：China Water Power Press，2001.(in Chinese)) " target="_blank">
[2]	韩伯鲤，张文昌，杨存奋. 新型地质力学模型材料(MIB)[J]. 武汉水利电力学院学报，1983，(1)：11-17.(HAN Boli，ZHANG Wenchang，YANG Cunfen. A new model material of geomechanics (MIB)[J]. Journal of Wuhan University of Hydraulic and Electric Engineering，1983，(1)：11-17.(in Chinese)) " target="_blank">
[6]	ADACHI T，KIMURA M，KISHIDA K. Experimental study on the distribution of earth pressure and surface settlement through three-dimensional trapdoor tests[J]. Tunnelling and Underground Space Technology，2003，18(2-3)：171-183. " target="_blank">
[8]	刘涛，沈明荣，袁勇，等. 连拱隧道模型试验中的量测方法应用研究[J]. 中国铁道科学，2007，28(2)：44-49.(LIU Tao，SHEN Mingrong，YUAN Yong，et al. Study on the measurement methods for model test of double-arch tunnel[J]. China Railway Science，2007，28(2)：44-49.(in Chinese)) " target="_blank">
[11]	袁文忠. 相似理论与静力学模型试验[M]. 成都：西南交通大学出版社，1998.(YUAN Wenzhong. Similar theory and statics model test[M]. Chengdu：Southwest Jiaotong University Press，1998.(in Chinese)) " target="_blank">
[3]	王汉鹏，李术才，张强勇，等. 新型地质力学模型试验相似材料的研制[J]. 岩石力学与工程学报，2006，25(9)：1 842-1 847.(WANG Hanpeng，LI Shucai，ZHANG Qiangyong，et al. Development of a new geomechanical similar material[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(9)：1 842-1 847.(in Chinese)) " target="_blank">
[9]	沈泰. 地质力学模型试验技术的进展[J]. 长江科学院院报，2001，18(5)：32-36.(SHEN Tai. Development of geomechanic model experiment techniques[J]. Journal of Yangtze River Scientific Research Institute，2001，18(5)：32-36.(in Chinese))
[12]	中华人民共和国行业标准编写组. TB10003-2005 铁路隧道设计规范[S]. 北京：中国铁道出版社，2005.(The Professional Standards Compilation Group of People?s Republic of China. TB10003-2005 Code for design on tunnel of railway[S]. Beijing：China Railway Publishing House，2005.(in Chinese)) " target="_blank">