共查询到20条相似文献,搜索用时 671 毫秒
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1概述 环境保护与水土保持是关系到经济发展及国计民生的重大事情,保持生态环境就是保护我们赖以生存的生命线。吉林省靖宇县地方铁路路基及其附属工程的设计工作,对该地区的环境保护及水土保持影响密切,必须特别重视。…… 相似文献
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通过荷日增建二线工程K558 424.26框架桥施工对既有线桥头路基防护方案的优化和比选,确定了采用钢筋混凝土锚定板加固既有路基的方案,既提高了施工进度,又保证了路基的稳定和行车安全。 相似文献
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南昆线七甸泥炭土路基沉降的模拟分析 总被引:1,自引:2,他引:1
南昆线七甸泥炭土路基处理采用碎石桩与粉喷桩两种方案。为验证设计,对这两种处理方案以及作为对照的天然地基、袋装砂井方案,进行了模拟沉降变形的离心模型试验和有限元分析,并将结果与实测沉降进行了对比分析。 相似文献
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分析冲积土路基病害形式及产生原因,提出综合治理的三个方案;土工格栅加固;稳定土桩复合地基处理下陷;塑料网垫与植被复合护坡。 相似文献
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在定性分析的基础上,对宁夏古王高速公路特殊的盐渍土地段,提出了可生性的施工方案及处理方法。 相似文献
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在路基施工中,前期准备和前期施工质量是相当重要的,为此,需要预先制订一个合理而全面的路基施工方案,并对前期施工可能遇到的施工技术难点如原地面填前压实、坑塘填筑和路基排水系统的设置等问题有足够的了解,从而为保证路基整体质量创造必要的基础。本文将经作简明的畅述,供广大施工人员参考。 相似文献
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软基路段桥台裂缝病害分析及防治方案 总被引:1,自引:0,他引:1
广东某沿海高速公路,多座位于软基路段的薄壁桥台出现裂缝。根据薄壁桥台上裂缝的性状,就其成因进行了详细的病害分析,并针对性地提出了各种类型裂缝的防治方案。 相似文献
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洛阳铁路枢纽调整规划研究 总被引:1,自引:0,他引:1
通过研究洛阳铁路枢纽存在的问题、能力利用现状以及枢纽的运输需求,得出洛阳枢纽能力紧张、不能满足日益增长的客货运量运输需求的结论。结合枢纽自身特点,提出成环发展的规划方案,通过对运输能力计算表明,所提出的规划方案能缓解当前运输能力紧张的局面。 相似文献
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粤海通道铁路栈桥是我国第一座海上铁路栈桥,其结构技术与普通桥梁有很大差异。简要介绍粤海铁路栈桥的结构技术特点。 相似文献
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Railway Vehicle Active Suspensions 总被引:3,自引:0,他引:3
J. K. Hedrick Associate Professor 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1981,10(4):267-283
This paper reviews the state-of-the-art of active suspensions for use on railway vehicles. The primary focus of the paper is on ride quality control, both vertical and lateral, and on lateral stability control.
The section on theoretical considerations summarizes the results of a one-degree of freedom optimization and then investigates analytically the use of active suspensions for lateral ride and stability augmentation. It is shown that separate control structures using different measurements and actuator actions are very effective in controlling both ride quality and stability.
A section on a survey ofcurrent activities reviews published research on active railway suspension work around the world.
Finally a concluding section indicates future trends in active suspension applications. 相似文献
The section on theoretical considerations summarizes the results of a one-degree of freedom optimization and then investigates analytically the use of active suspensions for lateral ride and stability augmentation. It is shown that separate control structures using different measurements and actuator actions are very effective in controlling both ride quality and stability.
A section on a survey ofcurrent activities reviews published research on active railway suspension work around the world.
Finally a concluding section indicates future trends in active suspension applications. 相似文献
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山西中南部重载铁路与京沪高铁在山东泰安交叉,由于重载铁路设计轴重达30 t,动应力影响深度大,采用何种路基结构型式,避免外荷对高铁桥墩的影响,成为控制线路安全通过高铁的关键。同时,该处线路北临大汶河,采用何种防水路基结构,以满足大汶河百年洪水位防洪要求,也是设计需考虑的重要因素。研究结果表明:采用路堤式U型槽路基结构型式,取得了预期效果。 相似文献
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Stabilization of High-Speed Railway Vehicles 总被引:4,自引:0,他引:4
Y.V. Diomin 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1994,23(1):107-114
The problems of critical speeds of railway vehicles with dry friction units determination are discussed. A new approach is used which extends the field of application of dynamic response linear analysis methods to vital nonlinear multibody systems. The special features concerning the influence of dry friction forces in the body supports on the trucks and parameters of horizontal constraints of wheelsets and truck frames on critical speed are indicated. It is shown that a significant rising of railway vehicle critical speeds can be reached by changing the structure of constraints between the body and the trucks. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(5):255-269
SUMMARY In the present paper the theories of the railway wheel and the automotive tyre are discussed. After an introduction the paper opens with a discussion of the common ground, viz. the rolling motion of deformable bodies. Then the railway wheel is discussed, and it is shown that all aspects may be calculated numerically from the material constants Poisson's ratio, Young's modulus, and the coefficient of friction, and from the geometry of wheel and rail. Next the automotive wheel is considered. Such a wheel is very anisotropic, to the extent that the theory of the lateral motion (out-of-plane dynamics) is radically different from the longitudinal, or in-plane motion. Moreover, the analysis of the automotive wheel heavily relies on experiments. In the conclusion, the theories are compared. 相似文献