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文章针对地铁隧道近接施工工程风险评估与管理问题,提出了将ANP-FE和数值模拟结合起来的一种全新风险管理理念和方法;在调查、研究和分析得到地铁隧道近接施工风险评价指标体系的基础上,将ANP与FE结合起来对风险进行评估,以解决风险影响因素之间相互依存和反馈的模糊性问题;然后以风险评价结果为依据,制定风险防范和控制措施;进一步对采取对策后的工程开展数值模拟,以此来检验措施的有效性和评价方法的科学性;最后,以广州地铁6号线某近接工程为研究对象,对该风险评估与管理方法的具体实施过程做了详细阐述.实践证明,该理论体系和方法能够有效地对地铁隧道近接施工工程的风险进行评估、控制和管理,提高风险评估过程的科学性. 相似文献
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施工技术、施工环境以及施工设备是隧道施工中的主要安全风险因素。文章立足于上述风险因素,从梯阶层级搭建、风险因素的权重核算及层级因素排序等方面,研究了隧道施工的安全风险评估关键技术,并结合工程案例,验证所研究的技术是否满足隧道施工安全风险评估要求。 相似文献
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嘉华隧道施工安全风险控制应用 总被引:5,自引:0,他引:5
结合重庆嘉华工程嘉华隧道施工,从安全风险控制出发,分析了城市公路隧道施工的危险源,采取了适当的安全风险监测手段,通过对安全风险源的监测.及时发现安全发展趋势,及时提出了修改完善施工工艺和施工参数建议,使嘉华隧道施工安全风险得到有效的控制.同时通过对施工资料和过程中的监测数据资料分析研究,使隧道施工安全和进度得到最优结合. 相似文献
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武汉长江公路隧道是长江上第一条采用盾构法施工的大直径公路隧道,由于其规模大、水头高,以及水文、地质、工程条件特别复杂,因而面临着许多技术难点和风险.文章从工程的组织实施角度对该隧道工程可能遇到的技术难点和风险进行了分析,并提出了解决问题的建议. 相似文献
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"超限超载"的产生与发展,蕴藏着深层的内在运作机理,包含着复杂的经济社会原因.其中道路货物运输价格体系的长期扭曲失衡与成本结构的有欠合理是一个不容忽视的根本原因.为此,公路所开展了货运市场运价与成本"治超"专项研究,先后历时一个多月,行程数千公里,深入7省市运输一线,对21家典型企业和个体业户的23辆货车、24条线路进行了跟踪调查,获取了大量的第一手资料与原始数据,并对此进行了解析. 相似文献
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Ngila Mwase† 《运输评论》2013,33(3):191-206
Zambia has attempted to reduce her excessive transport dependency on her traditional transport routes via South Africa and the former Portugese colonies. The costly construction of the Tanzania‐Zambia Railway (TAZARA) was part of this diversification strategy. This article examines the nature, extent and direction of Zambian traffic, including its historical evolution. It explores further the place of TAZARA among the various routes to Mozambican, Angolan and South African ports, and the ensuing actual and potential competition. Future traffic patterns will be influenced not only by the direct and service‐oriented costs of the different lines, but also by the region's volatile and uncertain political climate. 相似文献
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针对海中箱梁现浇施工中的工程量大、工期紧迫、悬臂法施工不能满足工期要求和施工难度大等问题,文章结合青岛海湾大桥箱梁现浇施工实践,介绍以钢管桩支撑作为承载基础,采用贝雷梁与碗扣式支架相结合的支架,成功地解决现浇箱梁施工难题的方法。 相似文献
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Robert E. Paaswell 《Transportation》1973,2(4):351-371
An examination of current population statistics shows that in the U.S. more than half of the population is without immediate access to a car, and in the U.K. more than three-fifths of the population is without access to a car. This phenomenon has been accentuated by national investment in both countries in major highway programs. The term carless refers to more than just households that own no cars. It extends, in households with cars to those without licenses (old and young), the handicapped, and even the licensed drivers who have no access to the family car when it is in use elsewhere (e.g. at work). The most severely effected are those in urban areas and especially the urban poor. Transportation expenses are limited for the poor when other family expenditures (food, shelter) take a high priority. Once the work trip has been satisfied, money for other trips, for the poor, is not always available. One solution to cost-free travel is pedestrianism (walking), but this too is difficult in urban areas where the pedestrian has been overlooked in favor of the car. Solutions to problems of the carless include dial-a-ride, better public transit, and better design of urban form. 相似文献
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