共查询到20条相似文献,搜索用时 54 毫秒
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凯雷2级公路有硬质岩类边坡、软质岩类边坡、土石混杂边坡和土质边坡4种类型的边坡。根据生态恢复原则选用不同的恢复措施,硬质岩类边坡采用垂直绿化的恢复措施,软质岩类边坡采用三维网喷播绿化的恢复措施,土石混杂边坡采用喷有机质材绿化的恢复措施,土质边坡采用直接喷播绿化的恢复措施,以达到较好的恢复效果。 相似文献
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《筑路机械与施工机械化》2019,(3)
为研究特高人工边坡稳定性及其治理工程措施,选取陕北某黄土-砂泥岩组合型人工特高边坡为研究对象,阐述了该边坡工程地质特性及变形破坏特征,查明了边坡变形破坏原因。采用极限平衡法和数值模拟方法分析了边坡的稳定性。研究表明,计算结果与实际情况基本吻合,因此必须对边坡采取相应的治理措施。在稳定性分析基础上,结合该复合型特高边坡场地特点及其变形破坏原因,通过方案比选确定治理措施为综合采用浆砌石护面墙、地表排水沟、竖井排水、抗滑桩。 相似文献
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梅河高速公路程江至华城段K28+360~+860段边坡病害为典型的路堤边坡病害。由于填土堵塞原地下水排泄通道,地表水下渗,填土加载三个主要因素的影响,使边坡发生变形。通过对边坡迹象、监测资料的分析,得出边坡滑动面位置。根据变形严重程度将边坡区分为三个区,对各区采用针对性地防治措施。治理工程采用加固与排水相结合的综合治理措施。通过对该滑坡病害原因及治理措施的分析,以资对同类滑坡病害的防治提供参考。 相似文献
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基于生态边坡坡面防护方案,在常规基础上提出了土工格室规格及外掺作物秸秆加筋的改进措施;搭建了室内模拟边坡降雨冲刷试验;控制土工格室规格及外掺作物秸秆加筋变量,分析模拟边坡降雨冲刷数据,综合对比生态边坡坡面防护效果。结果表明:土工格室及外掺作物秸秆加筋的综合措施能显著提升生态边坡坡面抗冲刷能力,增强边坡防护效果;单一采用土工格室措施的生态边坡冲蚀量相较于裸坡可降低71.27%,采用土工格室及外掺作物秸秆加筋的复合措施可降低84.65%;缩小土工格室尺寸有利于降低生态边坡坡面模拟降雨冲蚀量,提升防护效果。 相似文献
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常吉高速公路湘西段路堑边坡稳定性研究 总被引:1,自引:0,他引:1
根据常吉高速公路湘西段路堑边坡的地质特征,采用CSM R评价体系研究了边坡整体稳定性和可能破坏模式,提出了路堑边坡的防护措施。 相似文献
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"径向力"是预应力混凝土中不可避免的应力,在桥梁设计中,一般设计人员都会加以重视,但因施工因素(如波纹管的偏位)出现的径向力,若超出桥梁容许范围,将会出现桥梁开裂、崩裂等问题,势必会降低桥梁的耐久性。该文对一起因径向力引起桥梁开裂事件的发生原因、解决方法,以及善后工作作了全面描述。 相似文献
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与宝马公司共同开发、采取独特的涡轮增压新技术——单涡轮双涡管,这一切使东风标致的新一代动力总成充满了诱惑力。 相似文献
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汽车起动机的滚柱式离合器在启动过程中,一方面单向受力对外做功,另一方面通过特殊结构来达到自我保护的作用。通过对滚柱的受力分析,较清晰地说明了这一运动过程。 相似文献
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基于基坑开挖的时空效应,提出了一种基坑伺服轴力钢支撑系统的轴力施加策略,并以工程实例介绍了实施技术路线。根据理论计算和实测数据结果显示,这种轴力施加策略符合基坑设计理论,易于操作,可有效控制基坑变形,从而减小基坑开挖过程对敏感建构筑物的扰动。 相似文献
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A.G. Thompson P.M. Chaplin 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1996,25(3):185-202
For a simple vehicle active suspension system complete optimality and zero steady state body displacements may be achieved if the axle and body accelerations, and other easily measured quantities, are included in the performance index. Apart from not requiring an observer, this also allows the optimal feedback gains to be determined for an arbitrary body spring rate. In a theoretical example, model parameters matching those of an experimental test rig are employed. The results of computer simulations, with and without an electrohydraulic servovalve and actuator, are compared to demonstrate the effects of inner loop gain on force control. Aspects of the system behaviour including lockup are commented upon. 相似文献
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Force Control of a Semi-Active Damper 总被引:4,自引:0,他引:4
F.H. Besinger D. Cebon D.J. Cole 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1995,24(9):695-723
Two strategies are investigated for controlling a semi-active damper to track a prescribed force demand signal: (i) 'open loop' control, using a model of the damping force versus velocity characteristics; and (ii) force feedback (closed loop) control.
The damping characteristics and switching transients of a prototype damper were measured, and used to develop a mathematical model of the dynamics of the damper. The two control strategies were investigated using an idealised (constant velocity) test. Their performance was also simulated and measured under realistic operating conditions using the Hardware-in-the-Loop testing method.
Open loop damper control was generally found to give superior performance to force feedback control, due to its smaller phase lag at high frequencies. 相似文献
The damping characteristics and switching transients of a prototype damper were measured, and used to develop a mathematical model of the dynamics of the damper. The two control strategies were investigated using an idealised (constant velocity) test. Their performance was also simulated and measured under realistic operating conditions using the Hardware-in-the-Loop testing method.
Open loop damper control was generally found to give superior performance to force feedback control, due to its smaller phase lag at high frequencies. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(9):695-723
SUMMARY Two strategies are investigated for controlling a semi-active damper to track a prescribed force demand signal: (i) ‘open loop’ control, using a model of the damping force versus velocity characteristics; and (ii) force feedback (closed loop) control. The damping characteristics and switching transients of a prototype damper were measured, and used to develop a mathematical model of the dynamics of the damper. The two control strategies were investigated using an idealised (constant velocity) test. Their performance was also simulated and measured under realistic operating conditions using the Hardware-in-the-Loop testing method. Open loop damper control was generally found to give superior performance to force feedback control, due to its smaller phase lag at high frequencies. 相似文献