锚固力损失与岩土体时效变形耦合模型研究

doi:10.13722/j.cnki.jrme.2021.0759

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摘要预应力锚索的锚固力损失是造成锚固工程失效的关键因素，研究锚固力时效变化规律至关重要。锚索与岩土体长期相互作用时，两者受力相等而变形不同，锚固力的损失需要同时考虑锚索自由段和锚固段分别与岩土体相互作用的影响。采用胡克体和广义开尔文体分别模拟锚索和岩土体，考虑锚索自由段与相应的岩土体并联，锚固段与岩土体串联，建立锚索与岩土体蠕变的耦合模型，推导其本构方程、松弛方程和蠕变方程。对比已有计算模型和试验值，验证该模型的合理性和精准性，分析锚索和岩土体的参数对锚固力损失率的影响。结果表明：锚固力损失率随锚索等效弹性模量增大而增加，随岩土体的滞后弹性模量和黏滞系数增大而减小；自由段和锚固段岩土体的瞬时弹性模量或黏滞系数等量变化时，引起的损失率改变量相等；自由段的岩土体滞后弹性模量等量变化引起的损失率改变量比锚固段更大。该模型能更真实地反映锚固力损失规律。

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	董旭光1
	2
	马子涵1
	2
	李峥1
	2
	周粲铭1
	2
	王永胜3
	靳高明4

关键词 ：土力学, 锚固工程, 预应力锚索, 锚固力损失, 锚索&ndash, 岩土体相互作用, 耦合模型

Abstract：The anchorage force loss of prestressed anchor cables is the key factor causing the failure of engineering. It is vital to study the time-dependent variation law of the anchorage force. When the anchor cable interacts with rock-soil mass for a long time，the stress is equal but the deformation is different. The loss of the anchorage force needs to consider the influence of the interaction between free and anchorage sections of the anchor cable with the rock-soil mass respectively. The Hooke and the Generalized Kelvin bodies are used to simulate the anchor cable and the rock-soil mass respectively. Considering that the free section of the anchor cable is in parallel with the corresponding rock-soil mass but the anchorage section is in series with the rock-soil mass，a coupling model of the anchor cable and rock-soil mass creep is established，and its constitutive，relaxation and creep equations are derived. The rationality and accuracy of the model are verified by comparing with the existing models and experiment data，and the influence of parameters of the anchor cable and the rock-soil mass on the anchorage force loss rate is analyzed. The results show that the loss rate of the anchorage force increases with increasing the equivalent elastic modulus of the anchor cable but decreases with increasing the hysteretic elastic modulus and the viscosity coefficient of the rock-soil mass. When the instantaneous elastic modulus or the viscosity coefficient of the rock-soil mass in free and anchorage sections changes by the same amount，the change of the loss rate is equal. The change of the loss rate caused by the change of the hysteretic elastic modulus in the free section is more than that in the anchorage section. The model can more truly reflect the regular of the anchorage force loss.

Key words： soil mechanics anchorage engineering prestressed anchor cable loss of anchorage force anchor cable and rock-soil interaction coupling model

引用本文:

董旭光1，2，马子涵1，2，李峥1，2，周粲铭1，2，王永胜3，靳高明4. 锚固力损失与岩土体时效变形耦合模型研究[J]. 岩石力学与工程学报, 2022, 41(6): 1093-1102.
DONG Xuguang1，2，MA Zihan1，2，LI Zheng1，2，ZHOU Canming1，2，WANG Yongsheng3，JIN Gaoming4. Study on coupling model of anchorage force loss and time-dependent deformation of rock-soil mass. , 2022, 41(6): 1093-1102.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0759 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I6/1093

[3]	陈安敏，顾金才，沈俊，等. 软岩加固中锚索张拉吨位随时间变化规律的模型试验研究[J]. 岩石力学与工程学报，2002，21(2)：251-256.(CHEN Anmin，GU Jincai，SHEN Jun，et al. Model testing research on the variation of tension force of anchor cable with in reinforcement of soft rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(2)：251-256.(in Chinese))
[5]	陈沅江，尹进，胡毅夫. 软岩边坡锚索预应力定量损失规律研究[J]. 岩石力学与工程学报，2013，32(8)：1 685-1 691.(CHEN Yuanjiang，YIN Jin，HU Yifu. Research on prestress quantitative loss law of soft rock slope anchor cable[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(8)：1 685-1 691.(in Chinese))
[1]	何思明，王全才. 预应力锚索作用机制研究中的几个问题[J]. 地下空间与工程学报，2006，2(1)：160-165.(HE Siming，WANG Quancai. Problems of the study on mechanism of anchor cable[J]. Chinese Journal of Underground Space and Engineering，2006，2(1)：160-165.(in Chinese))
[6]	丁多文，白世伟，罗国煜. 预应力锚索加固岩体的应力损失分析[J].工程地质学报，1995，3(1)：65-69.(DING Duowen，BAI Weiguo，LUO Guoyu. Stress loss analysis of the load losses of prestressed rock cable bolts[J]. Journal Engineering Geology，1995，3(1)：65-69.(in Chinese))
[11]	王军，曹平，林杭. 锚土界面位移特征及其蠕变损伤耦合效应研究[J]. 中国矿业大学学报，2018，47(2)：289-295.(WANG Jun，CAO Ping，LIN Hang. Characteristic of displacement on the interface between bolt and soil and damage transfer based on the coupling effect of creep and damage[J]. Journal of China University of Mining and Technology，2018，47(2)：289-295.(in Chinese))
[13]	冯忠居，江冠，赵瑞欣，等. 基于多因素耦合效应的锚索预应力长期损失研究[J]. 岩土力学，2021，42(8)：2 215-2 224.(FENG Zhongju，JIANG Guan，ZHAO Ruixin，et al. Study on pre-stress long term loss of anchor cable considering coupled multiple factors[J]. Rock and Soil Mechanics，2021，42(8)：2 215-2 224.(in Chinese))
[2]	CAO C，JAN N，REN T，et al . A study of rock bolting failure modes[J]. International Journal of Mining Science and Technology，2013，23(1)：79-88.
[4]	王克忠，吴慧，赵宇飞. 深部地下厂房锚索预应力损失与岩体蠕变耦合分析[J]. 岩石力学与工程学报，2018，37(6)：1 481-1 488. (WANG Kezhong，WU Hui，ZHAO Yufei. Coupling between reduction of force in prestressed anchor cable and rock creep in deep-buried underground powerhouse[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(6)：1 481-1 488.(in Chinese))
[7]	张发明，刘宁，陈祖煜，等. 影响大吨位预应力长锚索锚固力损失的因素分析[J]. 岩土力学，2003，24(2)：194-197.(ZHANG Faming，LIU Ning，CHEN Zuyu，etal. Analysis of factors affected on load losses of high capacity and long rock anchors[J]. Rock and Soil Mechanics，2003，24(2)：194-197.(in Chinese))
[8]	朱晗迓，尚岳全，陆锡铭，等. 锚索预应力长期损失与坡体蠕变耦合分析[J]. 岩土工程学报，2005，27(4)：464-467.(ZHU Hanya，SHANG Yuequan，LU Ximing，et al. Coupling analysis of long-term prestress loss and slope creep[J]. Chinese Journal of Geotechnical Engineering，2005，27(4)：464-467.(in Chinese))
[10]	邓东平，李亮. 锚索预应力长期损失与岩土体蠕变耦合模型研究[J]. 长江科学院院报，2015，32(8)：65-71.(DENG Dongping，LI Liang. Coupled model for the long-term pre-stress loss of anchor cable and geotechnical creep[J]. Journal of Yangtze River Scientific Research Institute，2015，32(8)：65-71.(in Chinese))
[12]	徐毅青，邓绍玉，葛琦. 锚索预应力初期与长期损失的预测模型研究[J]. 岩土力学，2020，41(5)：1 663-1 669.(XU Yiqing，DENG Shaoyu，GE Qi. Prediction models for short-term and long-term pre-stress loss of anchor cable[J]. Rock and Soil Mechanics，2020，41(5)：1 663-1 669.(in Chinese))
[14]	陈拓，陈国庆，黄润秋，等. 考虑高边坡强卸荷的锚索锚固力耦合变化模型[J]. 岩土力学，2018，39(11)：4 125-4 132.(CHEN Tuo，CHEN Guoqing，HUANG Runqiu，et al. A model of anchorage force loss of anchor cable during high slope strong unloading[J]. Rock and Soil Mechanics，2018，39(11)：4 125-4 132.(in Chinese))
[17]	李涛，蔡海波，刘波，等. 膨胀土地层锚索预应力损失与流变耦合模型研究[J]. 岩石力学与工程学报，2020，39(1)：147-155.(LI Tao，CAI Haibo，LIU Bo，et al. Study on prestress loss and rheological coupling model of anchor cables in expansive soil layers[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(1)：147-155. (in Chinese))
[18]	周德培. 流变力学原理及其在工程中的应用[M]. 成都：西南交通大学出版社，1995：27-35.(ZHOU Depei. Principle of rheological mechanics and its application in engineering[M]. Chengdu：Southwest Jiao tong University Press，1995：27-35.(in Chinese))
[20]	李英勇. 岩土预应力锚固系统长期稳定性研究[博士学位论文][D]. 北京：北京交通大学，2008.(LI Yingyong. Study on long term stability geotechnical prestessed anchorage system[Ph. D. Thesis][D]. Beijing：Beijing Jiaotong University，2008.(in Chinese))
[9]	王清标，张聪，王辉，等. 预应力锚索锚固力损失与岩土体蠕变耦合效应研究[J]. 岩土力学，2014，35(8)：2 150-2 156.(WANG Qingbiao，ZHANG Cong，WANG Hui，et al. Study of coupling effect between anchorage force loss of prestressed anchor cable and rock and soil creep[J]. Rock and Soil Mechanics，2014，35(8)：2 150-2 156.(in Chinese))
[15]	王国富，李强，路林海，等. 考虑锚索松弛特性的预应力损失计算模型研究[J]. 地下空间与工程学报，2017，13(6)：1 585-1 591. (WANG Guofu，LI Qiang，LU Linhai，et al. A coupled model research of anchor prestress loss considering the relaxation characteristics of anchor[J]. Chinese Journal of Underground Space and Engineering，2017，13(6)：1 585-1 591.(in Chinese))
[16]	肖世国，曹顺利，赵琳智. 加固岩体的预应力锚索拉力松弛分析模型[J]. 北京工业大学学报，2020，46(8)：940-947.(XIAO Shiguo，CAO Shunli，ZHAO Linzhi. Analysis model for relaxation effect of pulling force of prestressed anchor cables used in reinforcing rock mass[J]. Journal of Beijing University of Technology，2020，46(8)：940-947.(in Chinese))
[19]	王渭明，曹正龙，王刚刚，等. 厚冲积层锚索预应力损失研究[J].岩土工程学报，2014，36(9)：1 607-1 613.(WANG Weiming，CAO Zhenglong，WANG Ganggang，et al. Prestress loss of anchor cables in thick alluvial clay[J]. Chinese Journal of Geotechnical Engineering，2014，36(9)：1 607-1 613.(in Chinese))
[21]	郭德强. 软土地区基坑回弹机制及工程桩受力变形研究[硕士学位论文][D]. 天津：天津大学，2017.(GUO Deqiang. The study of pit resilience mechanism and behavior of pile in soft region[M. S. Thesis][D]. Tianjin：Tianjin University，2017.(in Chinese))