太原地铁1号线重大工程技术问题研究

太原地铁1号线对于太原市后续轨道交通建设项目具有示范和引导作用,因此需要慎重确定建设标准和工程技术方案。结合工程实际情况,采用对比分析、模拟计算等方法,对于1号线车辆选型和编组方案、长大陡坡地段的列车运行安全性及运行速度、太原站至南内环东街段线路走向及车站分布方案等几个重大工程技术问题进行分析研究,为项目提供专业、科学的决策依据,对于推动太原市城市轨道交通可持续发展具有重要作用。     

能量守恒原理在Ⅴ级围岩隧道衬砌设计中的应用研究

在围岩-衬砌这个封闭系统中,隧道的开挖和支护过程伴随着能量的传递和转化,不考虑热能散失并将围岩视为弹性体,则围岩势能的释放即为衬砌结构弹性应变能的增加。刘红燕等[1-2]利用该能量守恒原理对Ⅲ级围岩单线铁路隧道进行了衬砌厚度的计算,在此研究成果的基础上进一步研究了能量守恒原理对于Ⅴ级围岩衬砌设计的适用情况。针对Ⅴ级围岩建立FLAC3D模型动态模拟隧道的开挖过程,利用matlab语言编写弹性应变能密度函数从而得到实体模型各单元的弹性应变能,最后得到特定范围内围岩势能随掘进深度的变化曲线。由此围岩势能变化曲线可得出隧道开挖后围岩的势能释放值。此外,通过进行钢纤维混凝土(SFRC)构件的韧性试验,确定SFRC三分梁破坏与SFRC衬砌破坏时的能量消耗关系。据此建立能量方程并可得出SFRC衬砌的理论厚度,经检算,设计厚度满足安全性要求。结果表明,能量守恒原理的隧道衬砌设计方法不再受Ⅱ、Ⅲ级围岩小断面情形的限制,它同样适用于V级围岩大断面隧道的衬砌设计。     

AUTOCAD在隧道工程中的应用

随着AutoCAD技术的不断深入到建筑工程施工技术管理中,AutoCAD软件已不再是单纯的绘图工具了.在一些不规则的构筑物(如隧道)施工、放样、工程量的计算、工程资料的收集、整理,AutoCAD技术的运用,可以达到事半功倍的效果.     

隧道开挖的监理工作要点

结合多年的施工监理工作经验,简单论述隧道洞口开挖、洞身开挖与钻爆的监理工作要点。     

中心试验室如何控制工程材料质量的体会

在2003年~2004年工程材料价格持续上涨的情况下,结合台缙高速公路监理工作的实际,就中心试验室如何控制工程材料的质量谈几点体会。     

地质雷达在公路隧道施工中的应用

该文章介绍了地质雷达的工作原理及其探测方法,采用瑞典便携式多功能地质雷达进行探测,同时结合掌子面的地质描述对庄盖高速公路隧道进行超前预报及衬砌的监测检测。根据现场施工条件及其探测精度和深度的要求,侧线布置采用"一"字型测线,测量方法采用点测方式;衬砌检测方面采用线测方式。采用该方法对断层、含水裂隙、软弱夹层、初衬质量和钢拱架数量进行了全面的监测,其监测检测结果基本符合实际状况,同时为地质雷达在公路隧道监测检测方面的应用积累了一些宝贵的经验。     

南京长江隧道泥水盾构的工作特点及其维护保养策略分析

南京长江隧道首次使用两台德国海瑞克泥水盾构机,与硬岩掘进机相比,盾构机工作环境、作业程序、故障类型等均有其自身特点,例如环境条件优良、整体振感微弱、管线众多,液压系统的工作时间长、污染控制好,输送管壁磨损明显、光谱磨粒浓度整体水平低、盾构机连续推进没有大块保养时段等。针对此情况,借鉴国内外先进维保和监测技术,结合自身经验和优势,提出并优化视情维修保养规程,保证了工程高效、顺利完工。     

中天山隧道复杂地况下TBM施工应对措施

长大隧道(洞)TBM施工总会遇到各种复杂地况。由于TBM施工地质依赖性很强,地层越复杂对TBM施工影响就越大。以中天山特长隧道TB880E型敞开式硬岩掘进机施工为例,从刀盘刀具改良,制定各种TBM操作预案、施工预案等角度出发,详细阐述TB880E在大埋深、节理发育花岗岩复杂地层下施工应对措施。为类似TBM设计与施工提供一定借鉴和参考。     

Law and Characteristics Analysis of Domestic Tunnel Construction Accidents from 2006 to 2016北大核心CSCD

With the rapid development of tunnel construction in China, strengthening statistical studies of domestic tunnel construction accidents is of great significance in order to understand the safety status of tunnel construction and the development trends of tunnel construction accidents and for exploring the direction of future scientific re-search. There were 89 tunnel construction accidents in China (not including subway tunnels or municipal tunnels)from 2006 to 2016. The characteristics of these accidents are analyzed in terms of time distribution, spatial distribu-tion, grade and type of accident according to the statistics by means of line charts, bar charts and pie charts. Corre-sponding prevention and control recommendations are put forward considering the factors such as year, month, work-ing day, time period, region, location, grade and type. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

Controlling Structural Deformation of Surrounding Rock Passed by a Deep-Buried Tunnel北大核心CSCD

Layered rock masses with rapid and serious initial deformation and anisotropy regarding the spatial dis-tribution of the failure are encountered during the construction of many large and deeply buried tunnels on the Lan-zhou-Chongqing railway. It is difficult to deal with the resulting problems with conventional control measures, and additional support measures are frequently needed, which significantly affects construction. Focusing on this special large non-linear deformation, the failure mechanism of the large structural deformation of layered rock masses is thor-oughly analyzed by geological site surveys, laboratory tests, site tests and 3DEC discrete element numerical simula-tion. The research results show that high geostress induces rapid and strong squeezing deformation after excavation in low-strength rock masses, and anisotropy of the layered rock mass controls the stress redistribution after excava-tion and the asymmetrical distribution of tunnel section deformation. Based on the asymmetric deformation mecha-nism of the rock mass, a directional support measure for the disturbance anisotropy of the layered rock mass is pro-posed as a rock mass control to reinforce it in an active way. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.