“岩土与隧道工程”课程群建设与特色人才培养探讨

顺应交通大发展的难得机遇,以培养特色人才为目的,本文分析了＂岩土与隧道工程＂课程群建设与所在专业方向的定位与特色的关系,介绍了建设的内容与关键,提出了以修订培养计划、进行专业课程群综合教学改革、强化实践教学和建设精品课程为主的建设方案。     

Wind tunnel test and numerical simulation of wind pressure on a high-rise building

We carried out a wind tunnel test to measure cladding loads for a high-rise building of 295 m in height, which would be located in the business center of Chongqing Municipality, P. R. China. The rigid model was used to determine fluctuating local pressures on the exterior surfaces of the building. The wind tunnel test results show the cr/tical zone of wind pressures on building surfaces in both standalone and interference conditions. The computational fluid dynamics （CFD） was conducted by using the FLUENT Code to compare with the wind tunnel test results, and the steady three-dimensional turbulent flow with Realizable k-ε as a turbulence model was used. The CFD results are agree with the wind tunnel test results in regards to distributions of wind pressures over a high-rise building＇s surfaces.     

Gaussian beamed millimetre wave propagation characteristics due to reflecting behaviour in circle tunnel

Propagation characterization is one of the main building blocks for millimetre wave （MMW） communication. The Gaussian beam has attractive features to become a prospective wave form for millimetre radio communication, especially for the utility inside tunnels. A ray tracing method embedded with spectral features of Gaussian beam is employed to analyze mil- limetre wave propagation in a circle tunnel in this paper. In consideration of geometrical figure of the tunnel, the superposition behaviour of direct and reflective beams is analyzed via simplified approximation of Gaussian beam spectral feature. Then the propagation models are established to derive amplitude, phase, and delay spread of received wave. A typical straight tunnel model is used to simulate the propagation behaviour, where strong multi-path effect with deeply fading of signal intensity and dramatically enhancing of delay spread emerges. For investigation of the spectral feature of the multi-path effect, a reflection loss of 14 dB is taken into consideration at a designated point. To analyze the influences of frequency and transmission distance, the propagation characteristics at three different frequencies of 45 GHz, 65 GHz and 85 GHz are compared with the beam travelling down the tunnel. In addition, three different reflection losses of 14 dB, 20 dB, and 26 dB at the frequency of 65 GHz are also investigated to research the influence of the reflecting coefficient.     

木西岙连拱隧道稳定性分析

木西岙隧道的整体式双跨连拱特殊结构以及其复杂的地形地质条件,对洞室稳定性提出了更高的要求.在充分研究工程区内地质特征的条件下,采用有限单元法对木西岙连拱隧道开挖和支护两种状态下的围岩稳定性进行分析.分析结果表明采用的村砌结构能够有效减小围岩变形,控制围岩应力,对围岩稳定性起到了很好的加固效果.     

试述岩溶地段隧道施工措施

隧道工程由于开挖断面大,溶洞影响区域大,应充分考虑岩溶的危害,评价其影响程度,才能决定合适的溶洞处理措施。本文就岩溶地段隧道的施工提出了一些新的技术措施。     

三江口水电站导流洞塌方处理技术

三江口水电站导流洞施工在不良地质条件段开挖时发生多次塌方,本文结合具体工程背景,介绍隧洞塌方处理方案及处理技术,具有一定的参考价值.     

Effects of overburden, rock strength and pillar width on the safety of a three-parallel-hole tunnel

During the excavation of three-parallel-hole tunnel, the tunnel might collapse due to over-stress as a result of inadequate rock pillar width. Treating the rock overburden depth, rock strength, and rock pillar width as variables, a series of 3D numerical analysis was carried out to examine the effect of each variable on the safety of the tunnel, in particular the rock pillar. A stress strength ratio （SSR） was used to define whether the safety of the rock pillar was exceeded. A simple design chart for the case of three-parallel-hole tunnel, which took into account the influence of overburden depth, rock pillar width, and rock strength, was also proposed for used in the preliminary design stage.     

MCAI在隧道工程教学中的应用

多媒体计算机辅助教学（MCAI）有利于促进教学方法和教学手段的更新,推动教学方式方法的改革。本文主要介绍了运用MCAI在隧道工程课堂教学中的功能、意义、制作及体会。     

长大山区高速公路隧道防排水设计与施工

结合某山区高速公路隧道防排水设计与施工实例,介绍了山区高速公路隧道防排水工程的设计要点及在实际施工过程中的一些具体做法。     

长大山区高速公路隧道防排水设计与施工

结合某山区高速公路隧道防排水设计与施工实例,介绍了山区高速公路隧道防排水工程的设计要点及在实际施工过程中的一些具体做法。