Key Techniques for Construction of Sanyang Road Cross riverTunnel of Wuhan Rail Transit Line 7（武汉轨道交通7号线三阳路越江隧道施工关键技术）

The author focuse on the great challenges encountered during the tunneling process in the Wuhan Sanyang Road Tunnel, and the key techniques adopted to solve those problems. When tunneling in composite strata, engineers inevitably face problems such as inefficient excavation, excessive tool wear, excavation face instability and the risk of clogging. The TBM used in the project allows tool change under atmospheric pressure, which improves the efficiency of tool change and eliminated the risk of casualties during hyperbaric interventions. In terms of the tool wear and clogging, the authors propose technical solutions as follows: the optimization of the tool′s type and configuration, improvement of the central flushing system and chemical dissolution of clogging. The results indicate that through the countermeasures proposed, the tunneling efficiency can be improved effectively. They also reduce the cutter change frequency and eliminate the risk of TBM downtime. The technical achievements obtained in the construction of the Wuhan Sanyang Road Tunnel can provide technical reference for the construction of large diameter shield tunnels in composite strata in the future.     

基于发光反光高性能涂料的隧道照明安全与节能技术应用研究

为解决公路隧道照明节能压力和品质提升之间的矛盾问题，采用新型发光反光高性能涂料用于隧道涂装。通过模拟分析不同涂装方案对路面亮度、亮度均匀度及目标物亮度的增益作用得到适用于工程的应用方案。依托工程应用效果表明，采用发光反光高性能涂料涂装后，隧道行车安全性和舒适性程度更高，所用方案可降低隧道照明年运营能耗在20%以上。本技术对提升隧道照明安全和节能水平、推动隧道提质升级具有促进作用。     

TBS植被护坡在甬金高速公路岩石边坡中的防护和绿化

文章介绍TBS植被护坡技术在甬金高速公路试验段的设计与施工。     

盾构隧道结构耐久性问题思考

Structural durability of shield tunnel lining is a trans scale problem from mesoscopic material to macroscopic structure. With increasing amount of shield tunnel construction in China, the issues related to structural durability become more prominent. In this paper, the typical applications of shield tunnel lining in China and other countries are introduced. The service conditions and diseases of shield tunnel lining structure are then analyzed. The factors affecting the structural durability of shield tunnel lining, such as material, design, environment, construction, management and maintenance, are summarized. The research results and progress related to structural durability of shield tunnel lining are then reviewed in terms of tunnel durability, durability evaluation and prediction, durability ensuring techniques. Finally, the existing problems and future research directions in structural durability of shield tunnel lining are discussed in terms of durability ensuring techniques, impact of diseases and accidents, tunnel evaluation and rehabilitation, arrangement of secondary lining and establishment of dynamic evaluation system for structural durability.     

考虑结构面黏聚力损伤变化的洞室块体稳定分析

为研究隧道开挖过程中临空面块体的稳定情况,进一步探究在其结构面具有胶结强度情况下块体的稳定性,运用黏聚力模型模拟具有填充和胶结的结构面的抗拉强度和黏聚强度,以及相应的滑移和脱开行为。选取甘肃北山某典型花岗岩研究区域搜索出的块体,以及获得的结构面参数区间,分4种方案研究块体的稳定性,同时考虑初始地应力、开挖诱导的二次地应力等因素的影响。方案1赋予抗拉强度和黏聚强度一个很小的数值,从而可以分析块体仅受结构面摩擦应力影响下的稳定性;方案2、3、4分别考虑不同位置的块体可能的失稳情况,通过调整不同块体结构面的抗拉强度和黏聚强度,分析块体稳定性。分析结果表明： 黏聚力模型能较好地模拟具有填充和胶结的结构面的抗拉强度和黏聚强度,并且能模拟结构面的滑移和脱开行为,可作为块体稳定性分析计算的工具;此外,也为模拟胶结结构面损伤随时间的渐进性发展提供一个新思路。     

桥、隧、路、堤组合结构应用技术

为解决受周边既有环境影响下隧道出入口的展线难题,依托长沙市营盘路隧道工程实例开展系统性研究。结合桥、隧相连工程的实际特点,提出一种桥、隧、路、堤组合结构方案,并对该方案实施的可行性进行详细分析及阐述。通过运用Plaxis2D有限元软件对组合方案进行受力计算,结果表明: 护壁墙与隧道结构在位移的变化上基本达到协同变形,所设置的联系横、纵梁结构能有效地将护壁墙与隧道结构连接成整体,起到整体受力的作用。同时,在工程施工期间进行现场监测,结果显示： 大堤周边地表累计最大沉降量为15.44 mm,水平最大位移为6.72 mm,实际监测量均小于数值模拟的最大沉降量（21.34 mm）和最大水平位移（8.77 mm）。模拟结果对施工起到一定的指导作用,组合方案在满足承载力要求的前提下,最大限度地保留既有原始地貌,解决了特殊条件下的交通功能问题。     

Study of Collaborative Management of Intelligent Highway Tunnel（智慧公路隧道协同管理研究）

Aiming to solve the problems of collaborative management of intelligent tunnel and tunnel management under different traffic conditions, the tunnel is regarded as a part of highway, and five features of the intelligence are proposed from the definition of intelligence. In order to realize a collaborative management of intelligent highway tunnel, the spatial extent of tunnel is defined at first. Then, a collaborative management road topology based on road critical nodes is proposed; and a holographic collaborative control information system based on tunnel structure, facilities, vehicle, operation, management, and environment is established. Finally, collaborative control of people, cars, roads and environment could be realized, so as to improve the management level of the intelligent highway tunnels.     

Great Revolution in Maritime Transportation: Discussion on Preliminary Work and Operation Plan of Bridge/Tunnel Projects for Vacuum HTS Maglev Train at High Speed（畅想海上交通运输建设的伟大革命——真空高温超导磁浮高速列车桥隧工程前期工作与运行方案探讨）

The improvement in the operation speed of the transportation project means the progress and development of the construction technologies in transportation projects. In this paper, the following factors restricting the further improving of the speed of high speed railway are analyzed: as the operation speed increases, the trains in the dense atmosphere are subject to the wind induced resistance and various resistances caused by the friction between the wheels and the rails and by the irregularity of tracks, and the noise will also increase with a high power. Therefore, the economy and safety issues involved in the operation have become the main factors restricting the further improving of the speed of high speed railway. A scheme of vacuum pipelines of underwater vacuum tunnel and/or subwater bridge is proposed in this paper: the pipelines and cars are sealed and vacuated to form the quasi vacuum. The transportation system of the vacuum maglev train at ultrahigh speed with the HTS maglev technology can achieve the operation speed more than 4 times that of the existing HSR train (about 1 200 km/h). Key technologies for constructing the vacuum maglev tunnels/subwater bridges in respect of construction plans, vacuating and sealing, as well as maglev trains are introduced in this paper. The subjects to be further studied on the vacuum HTS maglev tunnels (pipelines) are analyzed from the aspects of technology, management, construction costs, operation expenses, candidate project, airtight materials for cars and evacuation in case of emergencies. It is recommended that "cross sea maglev train in vacuum tunnel" should be developed in the eco tourism project between the coastal cities and their neighboring islands and a series of necessary technical tests should be conducted during the trial operation, so as to obtain related experience. Based on the experience and lessons learned, the transportation system at ultrahigh speed may be implemented for strait crossing projects in China. Finally, a brief introduction to the research on HSR trains at ultrahigh speed in countries such as China, the United States and the Netherlands is presented in this paper. The development of vacuum pipeline transportation can drive the development of China′s transportation modes in a faster, safer and more energy efficient manner, facilitating the development of the fifth generation of transportation industry and its driving role in the social and economic development, and promoting the integration and progress of the economy of China or even the world at a higher speed.     

高填矩形、拱形截面明洞土压力差异性规律研究

为了得到矩形、拱形截面明洞土压力随填土高度的变化规律,采用模型试验与数值模拟相结合的方法进行研究,得到以下结果： 1）截面形式对明洞土压力大小影响很大,且基础刚度不同,差异性明显。拱形截面明洞洞顶轴线处竖向土压力大于矩形截面明洞。2）刚性基础拱形截面明洞洞顶同一平面竖向土压力变化呈减小-平缓的趋势,而柔性基础呈减小-增大-平缓的趋势; 矩形截面明洞呈增大-减小-平缓的趋势。3）刚性基础明洞洞顶同一平面水平土压力分布形式呈现出2个拱形,而柔性基础明洞仅在洞顶上方出现1个拱形。4）刚性基础拱形、矩形截面明洞洞顶至0.6倍洞高范围内土体位移分别呈“W”、“双V”形分布,0.6～3倍洞高内均呈“V”形分布,3倍洞高以上无相对沉降,而柔性基础明洞土体位移在0～3倍洞高内均为“V”形,3倍洞高以上无相对沉降。