监控量测在新奥法隧道施工中的应用

新奥法的核心思想为围岩与支护系统共同作用,以现场监测数据为围岩稳定的判据,对地下工程进行设计和施工。结合黄衙南高速公路隧道施工实例,介绍了监控量测的目的、内容及监测成果,结果表明,施工监控量测能够较好地指导设计与施工。     

浅谈监控量测在隧道新奥法施工中的应用

目前阶段,在隧道工程的实际施工过程中,新奥法的施工技术被广泛的应用。在新奥法的施工技术中,监控量测具有重要的作用。文章对监控量测在隧道新奥法施工过程中实际应用的目的以及该技术的主要内容和具体方法进行了全面的阐述,同时,对监控量测的数据采集分析与处理的工作进行了深入的研究,对隧道新奥法监控量测技术的应用进行了讨论。     

高速公路隧道新奥法施工监控量测

隧道采用新奥法原理施工时,利用围岩周边收敛和拱顶下沉量的观测值可对隧道周边围岩的应力动态过程及发展趋势、围岩稳定性以及支护的合理性进行监控,这对安全施工及保证工程质量具有重要作用.通过对新天坪岭隧道的实时监控与反馈信息分析,研究了隧道围岩的稳定状况,优化二次衬砌支护时间,确保了隧道在不良地质构造中施工安全和质量,是隧道...     

围岩监控量测在隧道新奥法施工中的应用

介绍了新奥法的现场量测是隧道设计和施工的重要手段，从量测要点、量测项目及其数据处理等方面作了详细阐述，指出合理有效地应用现场量测技术，可以确保施工安全，指导施工程序，方便施工管理。     

隧道新奥法施工中的监控量测

改建贵昆线六盘水至沾益段增建二线的歌乐隧道全长4584m，最大埋深约144m，净宽12．20m，设计净高9．17m，隧道区域内主要为玄武岩，局部夹凝灰岩、玄武土、薄煤层等，岩体裂隙、地下水发育，丽岩以Ⅲ、Ⅴ级为主。我项目部采用新奥法原理组织施工，下面就歌乐隧道的监控测量进行浅述。     

浅谈监控量测在隧道新奥法施工中的应用

对隧道新奥法施工中监控量测的目的、量测内容及方法、数据处理及分析应用三个方面进行了论述,从而为隧道的新奥法施工提供了详细、科学的参数,对隧道施工的合理性与经济性具有重要的意义。     

隧道新奥法施工中围岩的监控量测技术

简要介绍了隧道新奥法施工量测技术，从洞内观察、水平收敛量测和拱顶下沉量测等方面，对其监控量测的技术措施作了阐述，指出该方法对确保施工安全、指导施工程序、方便施工管理具有重要作用。     

监控与量测在软弱围岩新奥法施工中的应用

施工监控与量测对隧道工程的施工质量、安全,进度起着举足轻重的作用,本文结合白龙山隧道浅谈一下监控与量测在软弱围岩新奥法施工中的应用。     

监控量测在新奥法隧道施工中的应用

介绍了隧道围岩监测在隧道设计和施工中的重要性，阐述了新奥法监控量测的主要目的，论述了监控量测在富溪隧道中的应用，得出了监测数据的分析结论，确保了隧道的施工安全与质量。     

新奥法在高速公路隧道施工中的应用

简要介绍了"新奥法"隧道施工的特点,通过对柳树营隧道各施工阶段的监测与分析,结合应用"新奥法"施工的实践,详细介绍了隧道围岩新奥法施工和现场监控量测工作,以积累施工技术经验和取得良好的经济效益。     

线性计划方法及其在隧道工程中的应用

CPM作为十分有用的计划技术在建筑业得到了广泛使用,但也存在一些不足。而线性计划方法作为一种新的计划技术,针对诸如高速公路、铁路等线状工程项目的特点,是编制其进度计划十分有效的工具,但目前在理论和应用研究方面,还存在许多不足。本文介绍了线性计划方法并对该方法提出了一些改进。同时,通过一隧道工程,介绍了线性进度计划的绘制方法和步骤。     

Application of new urban tunneling method in Baikoh tunnel excavation

This paper reports a new mountain tunneling method which yielded good results in Baikoh Tunnel construction. Since tunnels in urban areas, in many cases, are driven through soft ground with groundwater and in locations close to various utilities and structures, maintaining the structural stability of not only the tunnels but also such nearby existing structures is of utmost importance. In order to solve these problem, two methods have been developed: an auxiliary method to restrict displacements which consists of the special jet grouting for foot piles and the long steel pipe forepiling, and a boring method for groundwater drainage which does not cause adverse effects on tunnel construction. Using these methods in combination, the new mountain tunneling method is a useful means for constructing tunnels with shallow overburden in soft ground in urban areas. This method is called the new urban tunneling method. This method is cost-effective compared with other tunneling methods, especially for short urban tunnels with shallow overburden. Therefore, this method will be used in many future tunnel projects in urban areas subjects to various restrictions.     

单线隧道监控量测方法

结合以往的监控量测经验,以单线隧道工程为例,阐述了隧道监控量测的方法及具体的监控量测方案,并对量测数据进行了分析,为隧道二次衬砌、支护类型判别提供了可靠依据。     

浅论测绘新技术在工程测量中的应用

从应用的角度讨论了工程测量的发展,鉴于此探讨了一系列测绘新技术的优点以及在工程测量中的应用,并提出了若干建议,旨在促进工程测量技术手段的更新,积极推动新技术的推广和应用。     

From the new Austrian tunneling method to the geoengineering condition evaluation and dynamic controlling method

The new Austrian tunneling method （NATM） is widely applied in design and construction of underground engineering projects. When the type and distribution of unfavorable geological bodies （UGBs） associated with their influences on geoengineering are complicated or unfortunately are overlooked, we should pay more attentions to internal features of rocks grades IV and V （even in local but mostly controlling zones）. With increasing attentions to the characteristics, mechanism and influences of engineering construction-triggered geohazards, it is crucial to fully understand the disturbance of these geohazards on project construction. A reasonable determination method in construction procedure, i.e. the shape of working face, the type of engineering support and the choice of feasible procedure, should be considered in order to mitigate the construction-triggered geohazards. Due to their high sensitivity to groundwater and in-situ stress, various UGBs exhibit hysteretic nature and failure modes. To give a complete understanding on the internal causes, the emphasis on advanced comprehensive geological forecasting and overall reinforcement treatment is therefore of more practical significance. Compre- hensive evaluation of influential factors, identification of UGB, and measures of discontinuity dynamic controlling comprises the geoengineering condition evaluation and dynamic controlling method. In a case of a cut slope, the variations of UGBs and the impacts of key environmental factors are presented, where more severe construction-triggered geohazards emerged in construction stage than those predicted in design and field investigation stages. As a result, the weight ratios of different influential factors with respect to field investigation, design and construction are obtained.     

Development of a new method for RMR and Q classification method to optimize support system in tunneling

Rock mass classification system is very suitable for various engineering design and stability analysis. JH classification method is confirmed by Japan Highway Public Corporation that this method can figure out either strength or deformability of rock mass, further appropriating the amount of rock bolts, thickness of shotcrete, and size of pitch of steel ribs just after the blasting procedure. Based on these advantages of JH method, in this study, according to data of five deep and long tunnels in Iran, two equations for estimating the value of JH method from Q and RMR classification systems were developed. These equations as a new method were able to optimize the support system for Q and RMR classification systems. From JH classification and its application in these case studies, it is pointed out that the JH method for the design of support systems in underground working is more reliable than the Q and RMR classification systems.     

一种新的GPS-RTK应用方法研究

本文讨论了利用GPS-RTK测量技术建立GPS控制网的方法。通过两次设基站法可将GPS-RTK获得的独立基线向量组成一定的网形,通过统一平差方法获得各个待求点的坐标。实验结果表明,该方法是可行的,具有很好的实用价值。     

A new 3D observation system designed for a seismic ahead prospecting method in tunneling

The tunnel seismic ahead prospecting method is usually used to estimate adverse geology ahead of a tunnel face. The observation system plays an important role in tunnel seismic ahead prospecting, which helps to obtain accurate imaging results. Optimizing the observation system is a key issue for seismic ahead prospecting. In this paper, observation layouts are evaluated and a new three-dimensional (3D) observation system is proposed by imaging results analysis. For linear and 3D layouts, imaging result analysis in this paper indicates that the mirror artifact caused by the linear layout (Which sets sources and geophones on a straight line) can be suppressed by the 3D layout, due to its energy concentration and convergence. Moreover, reflections using 3D layout identify real abnormal bodies better than the linear layout. Moreover, conventional observation layouts often use shot point on the tunnel face or front sidewall, which makes it difficult to filter interference waves from the back of the tunnel face. To solve this problem, typical numerical examples are conducted, and imaging results of observation layouts with shot point on front sidewall, tunnel face or back sidewall are studied. Results show shot point on the back sidewall helps to separate waves, suppress interference waves and extract effective waves (reflected P-waves by discontinuities) by apparent velocity filtering method, so shot point is designed on the back sidewall to get high-quality records. To balance record quality and application convenience, a new 3D observation system is proposed with 12 geophones and 10 shot points in a special arrangement. Compared with a linear layout, practical testing and application using the new 3D system indicate the main fractured zones are accurately identified and located, which proves the reliability and practicability of the new observation system.