大跨隧道双侧壁导坑法施工力学行为研究

结合某城市道路,对大跨隧道双侧壁导坑法施工进行了弹塑性数值模拟,探明了施工过程中国岩深部位移、围岩稳定性,以及衬砌结构的受力特性.研究表明,围岩等级较高,围岩条件差的情况下,采用双侧壁导坑法在技术上是可行的,并且能够很好的控制施工过程中围岩的稳定.     

新庄隧道冒顶处理方法探析

结合新庄隧道塌方,分析了隧道塌方的原因,介绍了隧道塌方冒顶的处理方法。     

港口干散货物流供应链信息协同运作模式分析

在国内外供应链管理研究及河北港口群煤炭业务现状调研分析的基础上,剖析现阶段港口煤炭供应链运营管理的问题。聚焦河北港口群煤炭供应链模式构建过程,梳理港口煤炭供应链管理流程,构建河北港口群供应链管理模式、物流协同模式、物流体系及物流供应链协同信息化支撑模式,解决制约港口煤炭供应链的信息共享不及时、信息流通不畅等问题。对港口煤炭供应链协同运作信息化体系进行总体框架设计,并选择典型平台建设探讨供应链协同运作信息化体系支撑实现模式,形成高效、科学、先进的河北港口群煤炭供应链管理模式。     

桩群绕流阻力物理模型试验测量技术研究

由于压强差的存在和桩群表面的摩擦力,水流流过桩群时将产生绕流阻力。对于单根桩的复杂水流条件下绕流阻力的理论分析尚待进一步研究,桩群的阻力计算更显复杂,限于理论计算桩群绕流阻力的复杂程度,桩群水流阻力数值模拟和物理模拟技术仍处在概化模拟阶段。为了通过实测数据辅助研究桩群阻力概化方法,依托物理模型技术、传感器发展水平、软硬件系统集成技术而提出一整套对桩群阻力测量技术的解决方案,并分析了测量结果的合理性。     

基于云重心理论的炮兵群（团）生存能力评估

利用云重心理论构建炮兵群（团）生存能力评估模型步骤为：确定评估对象指标体系、计算指标权重、列出指标的状态值、确定云的重心向量及确定加权偏离度,并通过实例验证了该模型的可行性。此方法简单易行,可操作性强,为炮兵群（团）生存能力评估提供了有效的方法。     

长沙南湖路湘江隧道通风方案初探

基于我国的经济技术发展现状及趋势,借鉴公路隧道通风的相关设计理论、原则以及国内已建类似工程的经验,针对长沙市南湖路湘江隧道的工程特点,探讨并分析影响该隧道通风方案确立的因素,提出既满足隧道内的行车安全和洞外环保要求,又有利于降低工程造价和减少运营费用的通风方案。     

Mechanism of Tunnel Water Inflow Caused by Bending Failure of a Waterproof Dike Based on a Circular Thin Plate Mechanical Model北大核心CSCD

Water bursts during tunnel construction endanger construction, and it is therefore necessary to reserve a waterproof dike with the required thickness to avoid water bursts and to take reinforcement of the dike and treatment of the structure liable to trigger a water burst. Using the water burst at K5+398 of the Mingyueshan tunnel of the Shanghai-Chengdu expressway as an example, and considering the type of tunnel section and the upright mudstone of the dike, the waterproof dike at the work face is simplified as a round thin plate. A formula for the calculation of a minimum safety thickness for the critical waterproof dike is deduced by analyzing the force applied on the water-proof dike, and the minimum safety thickness for the water burst section at K5+398 of the Mingyueshan tunnel is cal-culated. The numerical simulation analysis demonstrates the critical thickness of waterproof dike at K5+398 of the Mingyueshan tunnel is 1.4-1.55 m, and the calculated water inflow and water burst basically agree with the actual condition. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

Analysis on the Characteristics and Development Trends of the Support Technology of High Ground Stress Tunnels in China北大核心CSCD

Combining the present situation and development trend of different tunnel support technologies at home and abroad, this paper analyzes the problems of rockburst in hard rock tunnels and large deformation in soft rock tunnels caused by high ground stress. It is concluded that: 1) regarding the rockburst problem, the current support technology is mainly influenced by the rock burst mechanism which is dominated by static factors, and so the used support components are generally of smaller deformation performance and "passive support" properties; 2) as the rockburst is the result of dynamic-static stress coupling, and only the anchor bolt has the "active support" attribute in the current "shotcrete+anchor bolt+wire net" support system, so the best support system should have the two functions of active support and energy release in terms of the rockburst problem, and the key focus of the research and development is anchorage members; 3) there are three main support types for large deformation in soft rock tunnels, e.g. the heavy support, layered support and yielding support. Among them, the heavy support system in underground cavern with large deformation is easy to induce excessive surrounding rock pressure, and so the applicable conditions are limited. The layered support system is still not the best choice due to its immature theoretical study, difficult determination of the thickness value and the installation time of each support layer and the interference to construction progress. With the characteristics of timely support and yielding while supporting, the yielding support system can give full play to the performance values of surrounding rocks and supporting materials, and make both of them reach the optimal state, so it is the best choice for supporting the soft rock tunnels with large deformations. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

Numerical Simulation of Advanced Geological Forecasting Based on Multi- Source Seismic Interferometry北大核心CSCD

For existing advanced geological forecasting, the forecast distance is short and the test frequency is high, increasing test and construction risks. Since various methods have different requirements for the test environ-ment, preparation work can be tedious and result in a long construction time thereby affecting normal construction.A new advanced geological forecast technique based on multi-source seismic interferometry for tunnels is proposed.This technique uses the blast at one end of tunnel as a centrum and receives the signal at the other end of the tun-nel, therefore allowing advanced geological forecasting of the unexcavated tunnel part by relative processing and im-aging. A numerical simulation of this kind of geological forecasting using the finite difference method to simulate two kinds of unfavorable geological bodies (karst and a fault) predicted them accurately and verified the effective-ness and accuracy of this geological forecasting method. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

A Study of Prevention Techniques for Tunnel Lining Defects北大核心CSCD

Defects of tunnel lining, such as inadequate thickness, voids, cracks, rock falling and water leakage etc., endanger the safety of railway tunnel operation. Based on the site construction, an analysis of the reasons for lining defects was conducted; technical measures against lining defects were proposed and tests were carried out at site. The results show that these measures are reliable and effective, and the purposes of prevention and treatment are re⁃ alized. © 2018, Editorial Office of "Modern Tunnelling Technology". All right reserved.