深埋硬岩隧洞系统砂浆锚杆的加固机制与加固效果模拟方法

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摘要系统布置的砂浆锚杆是深埋硬岩隧洞主要支护结构，锚杆与围岩组成锚杆–围岩复合结构体，使围岩的力学特性得到改善。基于岩体的莫尔–库仑(M-C)屈服准则，推导锚杆–围岩复合结构体满足M-C准则的应力条件。结合岩体劣化本构模型，提出确定锚杆–围岩复合结构体力学参数的方法。锚杆与弹性围岩和屈服围岩组成的锚杆–围岩复合结构体的力学参数确定方法不同，锚杆与屈服围岩组成的锚杆–围岩复合结构体的力学参数与围岩当前状态的等效塑性应变有关。基于此提出一种模拟隧洞开挖支护过程中系统普通砂浆锚杆加固效果的数值方法。该方法能较好地模拟锚杆支护时机对围岩稳定性的影响。最后运用该方法对锦屏II级水电站2#引水隧洞围岩稳定性进行分析，为隧洞的施工和支护设计提供参考依据。

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	吴文平1
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	冯夏庭1
	张传庆1
	邱士利1
	李占海3

关键词 ：隧道工程, 深埋隧洞, 锚杆, 岩体劣化模型, 破坏接近度, 等效塑性应变

Abstract：Systematically grouted bolts，as the main support structure of deep-buried hard rock tunnels，compose the bolt-rock composite structure with surrounding rocks，which reinforces the mechanical property of surrounding rocks. Based on the Mohr-Coulomb(M-C) criterion，the stress condition and the strength of the composite structure meeting the M-C criterion were derived under high-stress conditions. Combining with the rock mass deterioration model(RDM) of brittle rock，an approach to determine the mechanical parameters of the composite structure was presented. The difference of mechanical parameters between two different composite structures of bolt-elastic surrounding rock and bolt-yielding surrounding rock was taken into account. In this approach，the mechanical parameters of the bolt-yielding surrounding rock composite structure were associated with present equivalent plastic strain of surrounding rocks. A numerical method，which could model the reinforcing effect of normally grouted bolts laid out systematically during excavating and supporting stages，was proposed. It is identified that this method has an advantage over other methods in modeling the effect of supporting time on surrounding rock stability. Finally，the method was applied to evaluate the stability of surrounding rocks，and related references were provided for design and construction of the diversion tunnel #2 of Jinping II hydropower station.

Key words： tunneling engineering deep-buried tunnels bolt rock mass deterioration model(RDM) failure approach index equivalent plastic strain

引用本文:

吴文平1，2，冯夏庭1，张传庆1，邱士利1，李占海3. 深埋硬岩隧洞系统砂浆锚杆的加固机制与加固效果模拟方法[J]. 岩石力学与工程学报, 2012, 31(S1): 2711-2721.
WU Wenping1，2，FENG Xiating1，ZHANG Chuanqing1，QIU Shili1，LI Zhanhai3. REINFORCING MECHANISM AND SIMULATING METHOD FOR REINFORCING EFFECTS OF SYSTEMICALLY GROUTED BOLTS IN DEEP-BURIED HARD ROCK TUNNELS. , 2012, 31(S1): 2711-2721.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2012/V31/IS1/2711

[1] LIU H Y，SMALL J C，CARTER J P. Full 3D modelling for effects of tunneling on existing support systems in the Sydney region[J]. Tunneling and Underground Space Technology，2008，23(4)： 399–420.

[2] BOBET A. A simple method for analysis of point anchored rock bolts in circular tunnels in elastic ground[J]. Rock Mechanics and Rock Engineering，2006，39(4)：315–338.

[3] 杨延毅，王慎跃. 加锚节理岩体的损伤增韧止裂模型研究[J]. 岩土工程学报，1995，17(1)：9–17.(YANG Yanyi，WANG Shenyue. Study on toughening of jointed rock masses reinforced with bolts[J]. Chinese Journal of Geotechnical Engineering，1995，17(1)：9–17.(in Chinese))

[4] 李术才，王刚，王书刚，等. 加锚断续节理岩体断裂损伤模型在硐室开挖与支护中的应用[J]. 岩石力学与工程学报，2006，25(8)：1 582–1 590.(LI Shucai，WANG Gang，WANG Shugang，et al. Application of fracture-damage model to anchorage of discontinuous jointed rock mass of excavation and supporting[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(8)：1 582–1 590.(in Chinese))

[5] 张玉军，刘谊平. 锚固正交各向异性岩体的三维弹塑性有限元分析[J]. 岩石力学与工程学报，2002，21(8)：1 115–1 119.(ZHANG Yujun，LIU Yiping. 3D elastoplastic finite element analysis for bolted orthotropic rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(8)：1 115–1 119.(in Chinese))

[6] 张强勇. 岩土工程强度与稳定计算及工程应用[M]. 北京：中国建筑工业出版社，2005：78–82.(ZHANG Qiangyong. Strength and stability analysis of geotechnical engineering and engineering applications[M]. Beijing：China Architecture and Building Press，2005：78–82.(in Chinese))

[7] 朱敬民，王林，顾金才，等. 岩石和锚杆组合材料力学性能的模拟试验研究[J]. 重庆建筑工程学院学报，1988，10(2)：11–18.(ZHU Jingmin，WANG Lin，GU Jincai，et al. Modelling study on mechanical behavior of complex material consisted of rock and rock bolts[J]. Journal of Chongqing Institute of Building Engineering，1988，10(2)：11–18.(in Chinese))

[8] 邹志晖，汪志林. 锚杆在不同岩体中的工作机制[J]. 岩土工程学报，1993，15(6)：71–79.(ZOU Zhihui，WANG Zhilin. Mechanism of anchor bar in different elastic modulus rocks by model test[J]. Chinese Journal of Geotechnical Engineering，1993，15(6)：71–79. (in Chinese))

[9] 朱维申，任伟中. 船闸边坡节理岩体锚固效应的模型试验研究[J]. 岩石力学与工程学报，2001，20(5)：720–725.(ZHU Weishen，REN Weizhong. Research on reinforcing effects for jointed rock masses of shiplock slope by physical modeling[J]. Chinese Journal of Rock Mechanics and Engineering，2001，20(5)：720–725.(in Chinese))

[10] 侯朝炯，勾攀峰. 巷道锚杆支护围岩强度强化机制研究[J]. 岩石力学与工程学报，2000，19(3)：342–345.(HOU Chaojiong，GOU Panfeng. Mechanism study on strength enhancement for the rocks surrounding roadway supported by bolts[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(3)：342–345.(in Chinese))

[11] 蔡小林，赵德安. 隧道计算中提高围岩参数模拟锚杆作用的探讨[J]. 兰州交通大学学报：自然科学版，2004，23(1)：10–14.(CAI Xiaolin，ZHAO De¢an. Probe into simulation of the bolt function by increasing geomaterial parameters in tunnel calculation[J]. Journal of Lanzhou Jiaotong University：Natural Science，2004，23(1)：10–14.(in Chinese))

[12] 陈卫忠，朱维申. 节理岩体加固效果及其在边坡工程中的应用[J].勘察科学技术，2001，(1)：3–6.(CHEN Weizhong，ZHU Weishen. Solidification effect of jointed rock mass and its application to the slope engineering[J]. Site Investigation Science and Technology，2001，(1)：3–6.(in Chinese))

[13] GRASSELLI G. 3D behavior of bolted rock joints：experimental and numerical study[J]. International Journal of Rock Mechanics and Mining Sciences，2005，42(1)：13–24.

[14] 江权，冯夏庭，陈国庆. 考虑高地应力下围岩劣化的硬岩本构模型研究[J]. 岩石力学与工程学报，2008，27(1)：144–152.(JIANG Quan，FENG Xiating，CHEN Guoqing. Study on constitutive model of hard rock considering surrounding rock deterioration under high geostresses[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(1)：144–152.(in Chinese))

[15] 朱浮声，郑雨天. 全长黏结式锚杆的加固作用分析[J]. 岩石力学与工程学报，1996，15(4)：333–337.(ZHU Fusheng，ZHENG Yutian. Support action analysis of tensioned and grouted bolts[J]. Chinese Journal of Rock Mechanics and Engineering，1996，15(4)：333–337.(in Chinese))

[16] 朱维申，张玉军，任伟中. 系统锚杆对三峡船闸高边坡岩体加固作用的块体相似模型试验研究[J]. 岩土力学，1996，17(2)：1–6.(ZHU Weishen，ZHANG Yujun，REN Weizhong. Similar model block tests for reinforcing effects of systematic bolts on rock mass of high slope of Three Gorges flight lock[J]. Rock and Soil Mechanics，1996，17(2)：1–6.(in Chinese))

[17] 勾攀峰，侯朝炯. 锚固岩体强度强化的实验研究[J]. 重庆大学学报：自然科学版，2000，23(3)：35–39.(GOU Panfeng，HOU Chaojiong. The study on the testing of strengthening the bolted rock body strength[J]. Journal of Chongqing University：Natural Science，2000，23(3)：35–39.(in Chinese))

[18] CARRANZA-TORRES C. Analytical and numerical study of the mechanics of rock bolt reinforcement around tunnels in rock masses[J]. Rock Mechanics and Rock Engineering，2009，42(2)：175–228.

[19] HAJIABDOLMAJID V，KAISER P K，MARTIN C D. Modeling brittle failure of rock[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(6)：731–741.

[20] 朱维申，李术才，陈卫忠. 节理岩体破坏机制和锚固效应及工程应用[M]. 北京：科学出版社，2002：116–128.(ZHU Weishen，LI Shucai，CHEN Weizhong. Anchorage effect and failure mechanism of jointed rock mass and engineering application[M]. Beijing：Science Press，2002：116–128.(in Chinese))

[21] 张传庆. 基于破坏接近度的岩石工程安全性评价方法的研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2006. (ZHANG Chuanqing. Study on method of safety evaluation for rock engineering based on failure approach index[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2006.(in Chinese))