共查询到19条相似文献,搜索用时 531 毫秒
1.
2.
在桥梁工程施工中,预制T梁结构施工对现场施工有非常高的要求,需要结合预制T梁的施工工艺、设计方案进行场地选择和控制。文章以某桥梁工程预制T梁施工为例,分析预制T梁技术施工要求,从施工准备、场地选择、模板施工、钢筋加工与绑扎等方面分析该技术工艺流程,同时对技术应用要点进行总结,以期为相关工程提供借鉴。 相似文献
3.
4.
文章以某省道新建预应力混凝土简支转连续T梁桥为研究背景,在T梁预制场随机选取一片T梁进行静载试验,通过分级加载测试T梁各截面的挠度、应变数据,结合有限元模型计算的理论值与实测数据进行对比分析,验证预制T梁的承载能力及工作性能.结果 表明,试验T梁的刚度、强度、抗裂性均满足设计要求,工作性能良好,可用于实际工程. 相似文献
5.
以杭绍甬智慧高速项目为依托,探究基于智慧建造技术的公路T梁预制流水线生产模式。依据公路T梁预制工艺,提出预制T梁流水线智能化生产工艺,基于智能建造技术实现梁板浇筑、养护自动化、张拉压浆智能化;结合业务管理需求,形成基于BIM、物联网和大数据等技术的综合信息协同管理系统。工程实践显示,提升了T梁预制生产质量,优化了管理工作流程,同时缩短了预制工期,取得较好的经济社会效益。 相似文献
6.
山区高速公路桥梁建设过程中,上部结构一般采用混凝土现浇梁或预制梁。混凝土现浇梁支架布置形式相对比较灵活,具有受桥梁曲线半径和纵横坡制约较小的优点,但支架安拆安全风险高、施工周期长;预制梁制作和架设施工工艺相对简单、施工周期短,但架桥机对桥梁曲线半径和纵横坡要求相对较高,因此预制梁的适用范围一直倍受架桥设备和架梁工艺的制约。以贵州省贵阳至黄平高速公路冯家庄互通桥施工为依托,深入研究了小半径、大坡度条件下预制T梁架设工艺,并通过现场施工验证,成功实现最小平曲线半径120m、最大纵坡4%、最大横坡6%条件下30m预制T梁的架设,形成山区高速公路小半径曲线桥T梁架设施工技术,为今后类似项目桥梁上部结构方案选型、小半径预制梁架设施工提供了经验参考。 相似文献
7.
介绍不具备预制梁场地和机械架设条件下,在支架上预制架设30m后张法预应力混凝土T型梁公路桥的施工技术。 相似文献
8.
9.
T梁预制过程中采取的施工技术直接影响到桥梁的整体稳定性,文章结合工程实例,对T型梁的预制方法及施工技术进行探讨,并针对施工过程中易出现的问题提出了相应的处治措施。 相似文献
10.
黄许立交桥跨越宝成铁路复线,主跨预应力混凝土T梁采用现场集中预制,单导梁拖拉架设方案,施工简洁、方便,不仅工效较高,而且保证了宝成铁路既有线行车安全。本文重点介绍单导梁及桁车的结构拼装、T梁拖拉、横移就位及相关的施工措施。 相似文献
11.
In this paper, we study the joint optimization of the tactical berth allocation and the tactical yard allocation in container terminals, which typically consist of berth side and yard side operations. The studied two objectives are: (i) the minimization of the violation of the vessels’ expected turnaround time windows with the purpose of meeting the timetables published by shipping liners, and (ii) the minimization of the total yard transportation distance with the aim to lower terminal operational cost. We propose a bi-objective integer program which can comprehensively address the import, export and transshipment tasks in port daily practice. Traditionally, a container transshipment task is performed as a couple of import and export tasks, called indirect-transshipment mode, in which the transit container are needed to be temporally stored in the yard. As the way of transferring containers directly from the incoming vessel to the outgoing vessel, called direct-transshipment mode, has potential to save yard storage resources, the proposed model also incorporates both indirect- and direct-transshipment modes. To produce Pareto solutions efficiently, we devise heuristic approaches. Numerical experiments have been conducted to demonstrate the efficiency of the approaches. 相似文献
12.
This paper is about yard management in container ports. As a tactical level decision-making tool in a port, a yard template determines the assignment of spaces (subblocks) in a yard for arriving vessels, which visit the port periodically. The objective of yard template planning is to minimize the transportation cost of moving containers around the yard. To handle yard template planning, a mixed integer programming model is proposed that also takes into account traffic congestion in the yard. A further complication is that the cycle time of the vessels' periodicities is not uniform and varies among them, perhaps being one week, ten days, or two weeks, etc. However, this multiple cycle time of the periodicities of vessel arrival patterns, which complicates the yard template decision, is also considered in the model. Moreover, a local branching based solution method and a Particle Swarm Optimization based solution method are developed for solving the model. Numerical experiments are also conducted to validate the effectiveness of the proposed model, which can save around 24% of the transportation costs of yard trucks when compared with the commonly used First-Come-First-Served decision rule. Moreover, the proposed solution methods can not only solve the proposed model within a reasonable time, but also obtain near-optimal results with about 0.1–2% relative gap. 相似文献
13.
文章通过对广西区境内某国道上的一座T梁桥的现状病害及成因进行分析,提出了针对性的处治建议,为国内同类型桥梁的病害处治提供参考。 相似文献
14.
15.
干坞是沉管隧道设计的重点和难点,其设计方案合理与否直接影响工程造价、工期。文章以佛山市汾江路南延线工程干坞设计为例,介绍一种新型的旁建干坞方案,即干坞与岸上主体基坑并排同期实施、管段预制与岸上段主体结构同步进行。该方案成功地解决了满足工程工期的大型干坞场地问题,并避免了轴线干坞工期长、独立干坞造价高等缺点。 相似文献
16.
文章基于土工格栅、土工格室、深层水泥搅拌桩的作用机理,以广西玉林至铁山港高速公路软土地基施工为例,介绍了土工合成材料与水泥搅拌桩组成的复合体系的设计方案,提出了该复合体系处理软土地基的施工工艺与质量检验方法。 相似文献
17.
大面积的溶洞给桥梁桩基施工带来了很大的困难,文章结合实际,对溶洞桩基施工过程中产生事故的原因进行分析,并提出相应的预防措施及治理方法。 相似文献
18.