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对港珠澳大桥的隧道工程采用盾构法还是沉管法进行比选,从工程地质、水文地质适应性的角度,提出了相应的结论和建议,对于港珠澳大桥的隧道工程方案的选择,具有一定参考价值。 相似文献
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Stonecutters Bridge in Hong Kong is a cable-stayed bridge having a colossal central span of 1018 m. The dynamic action of gusty wind on the bridge therefore needs careful consideration. In order to obtain a realistic estimate of the wind turbulence characteristics, Highways Department of Hong Kong Special Administrative Region (HKSAR) erected a 50 m high meteorological mast near Stonecutters Bridge and commissioned wind tunnel experiments employing a scale terrain model. Part I of this paper has focused the discussion on the study of mean wind and turbulence intensities. In this Part II of the paper, the other turbulence characteristics including wind power spectra, integral length scales and wind coherences will be discussed. 相似文献
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Hong Kong is situated in the typhoon belt thus major civil engineering structures such as tall buildings and bridges are exposed to very severe gusty winds caused by a direct hit once every few years. Stonecutters Bridge in Hong Kong is a cable-stayed bridge having a colossal central span of 1018 m. The dynamic action of gusty wind on the bridge therefore needs careful consideration. A study into the turbulence characteristics at the bridge site has therefore been initiated with the objective of deriving a model of turbulence suitable for buffeting calculations of slender structures. To this end, Highways Department of Hong Kong Special Administrative Region (HKSAR) erected a 50 m high meteorological mast at the bridge site and commissioned wind tunnel experiments employing a 1/1500 scale terrain model. Part I of this paper will focus on the study of mean wind and turbulence intensities. Part II will focus on the other turbulence characteristics including wind power spectra, integral length scales and wind coherences. 相似文献
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电气节能不能忽视线路损耗这些看似小的方面。在国家重点项目"深港西部通道工程"港方管区的电气设计中,完全遵循香港特别行政区的法规或规范,介绍了相关线路损耗的要求、线路铜损计算的方法及公式,并给出了一个铜损计算实例。 相似文献
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基于荷载作用到桥面板上有效工作宽度原理,利用Dr.Bridge3.1有限元分析软件进行桥面板横向计算.这种计算方法合理地考虑到桥面板上车轮荷载效应延桥梁纵向的不均匀分布,有关经验可供相关专业人员参考. 相似文献
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银川阅海大桥是宁夏自治区内最大跨径的三肋五孔中承式钢管混凝土系杆拱桥,本文详细介绍了:主桥的结构构造特点;采用空间有限元方法,对该桥进行的静力分析,并对主拱圈的屈曲稳定性进行了分析。同时,给出了结构的动力特征值,并采用反应谱法进行了地震动力响应分析。 相似文献
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In this paper, the development and implementation of a three-dimensional, numerical pollutant transport model, which is based on an orthogonal curvilinear coordinate system in the horizontal direction and a sigma coordinate system in the vertical direction, is delineated. An efficient as well as simple open boundary condition is employed for pollutant transport in this mathematical model. It is then applied to model the distribution and transport of Chemical Oxygen Demand in the Pearl River Estuary. The results from the numerical simulations illustrate that the transboundary or inter-boundary effects of pollutants, between the Guangdong Province and the Hong Kong Special Administrative Region due to the wastewater discharged from the Pearl River Delta Region, are quite strong. 相似文献
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南京市三山桥是跨越秦淮河的一座重要桥梁,跨径布置为(22.5+40+22.5)m,采用自锚上承式拱桥.文章对自锚上承式拱桥上部结构和下部结构进行了较详细的分析论述,设计实践表明:自锚上承式拱桥方案与周边环境相协调,采用线性规划法设计自锚预应力筋使结构满足正常使用和承载能力要求的同时达到了平衡拱脚推力的目的,提高了在软弱地基上建造拱桥的适应性和经济性. 相似文献