燃料油在隧道窑上的应用探讨

隧道窑由于燃用重油造成生产成本升高，为此探讨采用煤焦油沥青配制的燃料油替代重油燃烧。通过调节燃料油的温度和加入蒽油的比例解决了其粘度过大造成燃烧不完全的问题；同时改进烧嘴结构，使雾化效果更好，燃烧更加完全。试验证明，隧道窑燃用燃料油经济可行。     

考虑随机风影响的隧道通风量计算

现有隧道内通风量计算偏保守,往往需开启更多风机,导致能源浪费严重。本文提出一种考虑随机自然风影响下的隧道内通风量计算方法。将风频引入隧道通风量计算中,指出隧道内风频的两种表示方法,离散型风频分布和韦布尔风频分布,通过最小误差逼近算法计算韦布尔风频分布中的尺度系数A和形状系数K。通过算例可得,进口处考虑随机风比不考虑随机风的通风量多37.8%,说明考虑随机风影响可明显降低风机开启数量。     

Stochastic aspects of bridge deck aeroelasticity under turbulent flow

Returning to an earlier frequency-domain analysis of the problem of long-span bridge response to ambient winds, the paper emphasizes the indispensable experimental information necessary to bring results into conformity with full-scale prototype action. Focus is placed upon the use of a sectional wind tunnel model under simulated turbulent flow as the prime source of this information, which consists principally of the flutter derivatives and the spectra of the wind forces, both obtained under turbulent flow. The effect of three-dimensional turbulence upon the flutter derivatives is observed to influence structural stability in a manner consistent with that observed in full-bridge wind tunnel models.     

遗传算法在隧洞开挖爆破参数优化中的应用

介绍了利用遗传算法优化隧洞开挖爆破参数的理论和方法。以及该算法在阿荣旗-深圳高速公路隧洞爆破开挖工程中的应用。实例表明,利用遗传算法来调整爆破参数和支护参数,可以有效地降低隧道爆破成本。     

隧洞开挖中爆破震动控制研究

四川瀑布沟水电站隧洞掘进生产性试验爆破过程中,通过爆破震动观测,全面了解与分析了各种爆破方法和施工部位的爆破震动形成机理、传播规律及响应特性.探讨开挖爆破对隧洞本身及相邻隧洞的震动影响,据此提出能够有效实施的洞室控制爆破方法.     

计算机信息系统在隧道监控中的应用

本文结合工程实际,详细介绍了计算机监控系统在隧道监控中的应用,为隧道建设提供了有益的经验.     

基于特征断面的复杂巷道段三维建模

为解决巷道断面随工程需要及岩层变化不断改变,导致巷道三维建模程序复杂的问题,提出基于特征断面的巷道三维建模思想,通过建立巷道特征断面模型库,实现变化巷道段的三维建模,以期提高复杂巷道段的建模效率。首先阐述建模数据的采集方法,并对巷道断面进行了细化坐标分析;同时提出拐角处断面变化巷道段的平滑处理算法（通过圆弧来圆滑拐角处巷道中心线）,对普通巷道段采用三角剖分形成三角网完成巷道段的建模;而巷道断面发生变化的复杂巷道段存在简单曲面四边形,采用Bézier曲面及曲面的拼接完成巷道段的建模,并在实验中进行了验证     

Numerical investigation of fracture behavior of tunnel by excavation loading

A rock failure process analysis model, RFPA2D code, a two-dimensional numerical code, were proposed. The code not only satisfied the global equilibrium, strain consistent and nonlinear constitutive relationship of rock and soil materials but also took into account the heterogeneous characteristics of rock materials at macroscopic and microscopically level. The failure behavior of tunnel could be simulated by this numerical model. The model could realistically simulate the fracture behavior of tunnel by excavation loading, strength limits, and post peak response for both tension and compression. As the proposed method was used to conduct the stability analysis of tunnel, the safety factor of tunnel was defined as the ratio of actual shear strength parameter to critical failure shear strength parameter. Not only the safety factor of tunnel with specific physics meaning can be obtained, but also the overall failure process and the location of failure surface may also be determined at the same time.     

2 m 量级高速风洞测量系统常见故障及分析

为助力解决风洞试验中的疑难问题,对风洞试验中测量系统常见故障整理汇总进行分析。通过对2 m 量 级高速风洞试验中记录的常见故障汇总分析,整理出故障类型及其处理方式,使风洞试验中出现故障时能快速通过 该分析报告找到问题所在并解决故障。在2 m 量级高速风洞试验中的应用表明：该方法能实现常见故障出现后快速 查找问题关键的可行性,为风洞试验安全及试验效率提供有力支撑。