Abstract：Deformation of the surrounding rock during the whole excavation process is the basic premise to understand the evolution mechanism of interaction between the supports and the surrounding rock, which is also an important reference for stability evaluation of the surrounding rock and design of the supports. On the basis of collecting the deformation of the surrounding rock during the whole excavation process of 40 tunnels and underground projects, the whole process deformation and its key nodes, the distribution laws of deformation rate and deformation acceleration of the surrounding rock and the influencing factors are systematically analyzed. The results show that the advance deformation and basically stable deformation of the surrounding rock increase with the construction speed and decrease with the excavation radius, while the corresponding displacement release rates have no obvious correlation. With the increase of the surrounding rock, the advance deformation and basic stable deformation increase, and the corresponding displacement release rate decreases instead. By improving the Hoek’s formula, the whole-process deformation of the surrounding rock is fitted, and the goodness of fitting is above 0.95, which can provide a basis for the solution of loss displacement. The deformation rate of the surrounding rock first increases and then decreases with time, while the deformation acceleration shows the characteristics of "sinusoidal curve", both of which change significantly with tunnel radius and construction speed. According to the analysis results, it is pointed out that the deformation rate of the surrounding rock is small and the deformation duration is long for the large-section tunnels under unfavorable geological conditions, and the deformation acceleration should be taken as the main index to judge the stability of the surrounding rock. Furthermore, the determination method for deformation acceleration threshold is given.
孙振宇, 张顶立, 侯艳娟, 李奥. 基于现场实测数据统计的隧道围岩全过程变形规律及稳定性判据确定[J]. 岩土工程学报, 2021, 43(7): 1261-1270.
SUN Zhen-yu, ZHANG Ding-li, HOU Yan-juan, LI Ao. Whole-process deformation laws and determination of stability criterion of surrounding rock of tunnels based on statistics of field measured data. Chinese J. Geot. Eng., 2021, 43(7): 1261-1270.
[1] SAKURAI S, TAKEUCHI K.Back analysis of measured displacements of tunnels[J]. Rock Mechanics & Rock Engineering, 1983, 16(3): 173-180. [2] 陶连金. 有限元图谱法的位移反分析[J]. 矿山压力与顶板管理, 1990, 7(4): 57-60, 68-73. (TAO Lian-jin. Counter analysis of displacement by finite element atlas method[J]. Ground Pressure and Strata Control, 1990, 7(4): 57-60, 68-73. (in Chinese)) [3] 刘开云, 方昱, 刘保国. 基于进化高斯过程回归算法的隧道工程弹塑性模型参数反演[J]. 岩土工程学报, 2011, 33(6): 883-889. (LIU Kai-yun, FANG Yu, LIU Bao-guo.Elasto-plastic parameter inversion of tunnel engineering based on genetic-Gaussian process regression algorithm[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(6): 883-889. (in Chinese)) [4] 房倩, 粟威, 张顶立, 等. 基于现场监测数据的隧道围岩变形特性研究[J]. 岩石力学与工程学报, 2016, 35(9): 1884-1897. (FANG Qian, SU Wei, ZHANG Ding-li, et al.Tunnel deformation characteristics based on on-site monitoring data[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(9): 1884-1897. (in Chinese)) [5] 岳广学, 何平, 蔡炜. 隧道开挖过程中地层变形的统计分析[J].岩石力学与工程学报, 2007, 26(增刊2): 3793-3803. (YUE Guang-xue, HE Ping, CAI Wei.Statistic analysis of stratum deformation during tunnel excavation[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(S2): 3793-3803. (in Chinese)) [6] 张成平, 张顶立, 王梦恕. 大断面隧道施工引起的上覆地铁隧道结构变形分析[J]. 岩土工程学报, 2009, 31(5): 805-810. (ZHANG Cheng-ping, ZHANG Ding-li, WANG Meng-shu.Structural deformation of overlying subway tunnels induced by tunnelling[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(5): 805-810. (in Chinese)) [7] 袁勇, 王胜辉, 杜国平, 等. 双连拱隧道支护体系现场监测试验研究[J]. 岩石力学与工程学报, 2005, 24(3): 480-484. (YUAN Yong, WANG Sheng-hui, DU Guo-ping, et al.In-situ testing study on lining system of double-arched tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(3): 480-484. (in Chinese)) [8] PIETRO LUNARDI.隧道设计与施工—岩土控制变形分析法(ADECO-RS) [M]. 铁道部工程管理中心, 译. 北京: 中国铁道出版社, 2011. (PIETRO LUNARDI.The Design and Construction of Tunnel-Analysis of Controlled Deformation of Rock and Soil[M]. Project Management Center of Ministry of Railways, trans. Beijing: China Railway Publishing House, 2011. (in Chinese)) [9] SATO T, KIKUCHI T, SUGIHARA K.In-situ experiments on an excavation disturbed zone induced by mechanical excavation in Neogene sedimentary rock at Tono mine, central Japan[J]. Engineering Geology, 2000, 56(1/2): 97-108. [10] 娄海成. 浅埋偏压大断面隧道围岩变形与支护受力研究[D]. 北京: 北京交通大学, 2015. (LOU Hai-cheng.The Study of Strata Deformation and Support Behavior of Tunnel with Shallow Buried Depth and Unsymmetrical Pressure[D]. Beijing: Beijing Jiaotong University, 2015. (in Chinese)) [11] 许有俊, 王雅建, 冯超, 等. 矩形顶管施工引起的地面沉降变形研究[J]. 地下空间与工程学报, 2018, 14(1): 192-199. (XU You-jun, WANG Ya-jian, FENG Chao, et al.Research on ground deformation caused by rectangular pipe jacking construction[J]. Chinese Journal of Underground Space and Engineering, 2018, 14(1): 192-199. (in Chinese)) [12] QIAO L P, LI S C, WANG Z C, et al.Geotechnical monitoring on the stability of a pilot underground crude-oil storage facility during the construction phase in China[J]. Measurement, 2016, 82: 421-431. [13] 李鹏飞, 赵勇, 刘建友. 隧道软弱围岩变形特征与控制方法[j]. 中国铁道科学, 2014, 35(5): 55-61. (LI Peng-fei, ZHAO Yong, LIU Jian-you.Deformation characteristics and control method of tunnel with weak surrounding rock[J]. China Railway Science, 2014, 35(5): 55-61. (in Chinese)) [14] 白明洲. 大型地下洞室围岩稳定性的岩体结构控制效应研究[D]. 成都: 成都理工学院, 2000. (BAI Ming-zhou.Study on Control Effect of Rockmass Structure on Surrounding Rockmass Stability of Huge Underground Cavity[D]. Chengdu: Chengdu University of Technology, 2000. (in Chinese)) [15] 张顶立, 陈立平. 隧道围岩的复合结构特性及其荷载效应[J]. 岩石力学与工程学报, 2016, 35(3): 456-469. (ZHANG Ding-li, CHEN Li-ping.Compound structural characteristics and load effect of tunnel surrounding rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(3): 456-469. (in Chinese)) [16] 李世辉. 隧道支护设计新论(典型类比分析法应用和理论)[M]. 北京: 科学出版社, 1999: 99-102. (LI Shi-hui.A New Concept of Tunnel Support Design-Application and Theory of Precedent Type Analysis[M]. Beijing: Science Press, 1999: 99-102. (in Chinese)) [17] 铁路隧道设计规范: TB10003—2016[S]. 2016. (Code for Design of Railway Tunnel: TB10003—2016[S]. 2016. (in Chinese)) [18] VLACHOPOULOS N, DIEDERICHS M S.Improved longitudinal displacement profiles for convergence confinement analysis of deep tunnels[J]. Rock Mechanics and Rock Engineering, 2009, 42(2): 131-146. [19] 左建平, 孙运江, 王金涛, 等. 大断面破碎巷道全空间桁架锚索协同支护研究[J]. 煤炭科学技术, 2016, 44(3): 1-6. (ZUO Jian-ping, SUN Yun-jiang, WANG Jin-tao, et al.Study on full space truss and anchor coordinative support of mine large cross-section broken roadway[J]. Coal Science and Technology, 2016, 44(3): 1-6. (in Chinese)) [20] 徐营, 张子新. 块裂结构岩质地下洞室松动特征试验研究[J]. 岩土工程学报, 2010, 32(2): 216-224. (XU Ying, ZHANG Zi-xin.Experiment study on loose characteristics of underground excavation in block-fractured rock mass[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(2): 216-224. (in Chinese)) [21] PANET M, GUENOT A. Analysis of convergence behind the face of a tunnel[C]// Proceedings of the 3rd International Symposium on Tunnelling, 1982, London: 197-204. [22] CARRANZA-TORRES C, FAIRHURST C.Application of the Convergence-Confinement method of tunnel design to rock masses that satisfy the Hoek-Brown failure criterion[J]. Tunneling and Underground Space Technology, 2000, 15(2): 187-213. [23] 孙振宇, 张顶立, 房倩, 等. 隧道初期支护与围岩相互作用的时空演化特性[J]. 岩石力学与工程学报, 2017, 36(增刊2): 3943-3956. (SUN Zhen-yu, ZHANG Ding-li, FANG Qian, et al.Spatial and temporal evolution characteristics of interaction between primary support and tunnel surrounding rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(S2): 3943-3956. (in Chinese)) [24] LI S.An empirical hypothesis of deformation rate ratio criterion[J]. Rock Mechanics and Rock Engineering, 1996, 29(2): 63-72. [25] 张顶立, 孙振宇, 侯艳娟. 隧道支护结构体系及其协同作用[J]. 力学学报, 2019, 51(2): 577-593. (ZHANG Ding-li, SUN Zhen-yu, HOU Yan-juan.Tunnel support structure system and its synergistic effect[J]. Chinese Journal of Theoretical and Applied Mechanics, 2019, 51(2): 577-593. (in Chinese))
