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Kinematical analysis of highway tunnel collapse using nonlinear failure criterion

Journal of Central South University 2014年第1期21卷 381-386页

作者：杨小礼杨子汉潘秋景李育林 School of Civil Engineering Central South University

For different kinds of rocks,the collapse range of tunnel was studied in the previously published ***,some tunnels were buried in soils,and test data showed that the strength envelopes of the soils followed power-law failure *** this work,deep buried highway tunnel with large section was taken as objective,and the basic expressions of collapse shape and region were deduced for the highway tunnels in soils,based on kinematical approach and power-law failure *** order to see the effectiveness of the proposed expressions,the solutions presented in this work agree well with previous results if the nonlinear failure criterion is reduced to a linear Mohr-Coulomb failure *** present results are compared with practical projects and tunnel design *** numerical results show that the height and width of tunnel collapse are greatly affected by the nonlinear criterion for the tunnel in soil.

关键词： upper bound theorem tunnel collapse highway tunnel nonlinear failure criterion

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Analysis of Detection and Treatment Schemes of highway tunnel Lining Cracks

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Journal of Architectural Research and Development 2021年第1期5卷 4-7页

作者： Yike Wei Lingfeng Yu China Merchants Chongqing Testing Center for highway Engineering CO. LTDChongqing 400060China Chongqing Jiaotong University Chongqing 400074China

highway tunnels play a very important role in people's daily *** them,lining is an essential part of tunnel engineering,and the quality of lining greatly affects the overall quality of the *** this basis,the causes of lining cracks and the detection methods of existing highway tunnel lining cracks are analyzed,and the treatment countermeasures for highway tunnel lining cracks are proposed.

关键词： highway tunnel Lining Crack detection Treatment

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Experimental study on performance of spring damping support structure system for large deformation tunnel in soft rock

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Underground Space 2024年第2期15卷 221-243页

作者： Jinfeng Xu Xiongyao Xie Zhou Shi Wuqiang Cai Dinglun Xu Chen Xu Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China Key Laboratory of Geotechnical and Underground Engineering Ministry of EducationTongji UniversityShanghai 200092China Zhaotong City Zhaolu Expressway Investment and Development Co. ZhaotongYunnan Province 657000China Institute of Rock Mechanics Ningbo UniversityNingboZhejiang 315211China

According to the convergence confinement theory,it is an effective measure to control the large deformation of high ground stress in fractured soft rock tunnels by using yielding *** yielding support can be classified as either radial or circumferential yielding *** yielding support is achieved by transforming radial displacement into circumferential tangential closure without compromising the support capacity of the primary lining support *** on this,and inspired by the design principle of dampers,a yielding support structure system with spring damping elements as its core was developed,based on the connection characteristics of steel arches in highway tunnel,which can provide increasing support resistance in the yielding deformation *** the mechanical properties of spring damping elements were obtained through indoor axial pressure and flexural *** addition,according to these results with numerical calculations,the yielding support structure system with embedded spring damping elements can reduce the internal force of the support structure by approximately 10%and increase the area of the plastic zone of the surrounding rock by 11.23%,which can fully utilize the self-bearing capacity of surrounding rock and verify the effectiveness of circumferential yielding ***,the spring damping support structure system was designed with reference to the construction process of the tunnel excavated by drilling and blasting method,and the transformation of the spring damping element to spring damping support structure was *** on field test results,surrounding ground pressure for the yielding support optimization scheme was reduced by 40%and more evenly distributed,resulting in the successful application and a reduction in the construction cost of large deformation tunnels in soft rock.

关键词： Soft rock highway tunnel Convergence confinement method Circumferential yielding support with spring damping element Numerical calculations Field test

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贵金线道路隧道施工监测数据分析

贵金线道路隧道施工监测数据分析

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作者：敬亚平贵州大学

学位级别：硕士

随着我国交通建设的快速发展,特别是西部大开发战略的实施,公路隧道方案在山区和丘陵地区高等级公路建设中日益引起重视,不同长度、不同类型的山岭隧道大量涌现。因此,及时总结和研究山岭隧道监测技术,深入探讨隧道施工中各种不良现象... 详细信息

随着我国交通建设的快速发展,特别是西部大开发战略的实施,公路隧道方案在山区和丘陵地区高等级公路建设中日益引起重视,不同长度、不同类型的山岭隧道大量涌现。因此,及时总结和研究山岭隧道监测技术,深入探讨隧道施工中各种不良现象产生的原因,掌握已有隧道施工的成功经验和失败教训,才能为新建工程提供重要的参考资料和决策依据,对经济地、高质量地建设公路隧道十分必要。本文结合黔灵山隧道工程实践情况,对隧道预警段进行了详细的分析与对比。综合分析了隧道围岩受力、变形的大小及塑性破坏程度,总结了随着隧道掘进工作面的推进,工作面各个部位受力、变形及塑性破坏的变化规律,为隧道支护参数设计提供了依据。重点研究了监测信息处理方法在青山隧道工程中的实践,介绍了量测信息处理、反馈指导施工的过程,并对不良地质现象进行了评述。总结的监测技术在黔灵山隧道施工过程中取得的经验和成果有助于监测技术的应用和推广,可为类似条件的公路隧道工程实践提供借鉴。

关键词： highway tunnel monitoring measurement pplication of the advance geological forecast information processing information feedback

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