桥面铺装的合理结构研究

发布时间：2018-04-02 19:22

本文选题：桥面铺装　切入点：病害　出处：《长安大学》2014年硕士论文

【摘要】：近年来，我国桥梁建设飞速发展，结构形式不断创新，但在桥梁设计时，对桥面铺装的设计大部分使用传统形式，不作专门计算，，仅参照构造要求。但随着交通量的增加，桥面铺装的病害问题越来越严重，不能达到相关桥面铺装的设计寿命，这样不仅影响桥梁的正常使用，易造成桥梁交通事故，同时为桥梁的维修工作带来极大不便。桥面铺装问题已成为影响桥梁正常使用的关键问题，需要在以后的桥梁设计工作中多加注意。本文首先通过对黑龙江省的桥梁桥面铺装进行广泛调查，采用弹性理论分析水泥桥面在不同桥梁结构（梁桥为主）上的受力和破坏机理，提出了适用于高寒区环境和工程特点的简支结构、简支转连续结构、连续结构等三大类公路梁桥水泥混凝土桥面铺装结构。然后通过室内试验，分别研究了钢纤维水泥混凝土、聚丙烯纤维水泥混凝土的配合比理论、配合比影响因素、配合比设计方法，采用落锤冲击试验和弯拉弹性模量试验评价纤维增强混凝土的韧性系统性评价，以快冻法和抗渗系数系统评价桥面铺装用纤维增强混凝土耐久性系统性评价，同时在满足桥面混凝土技术标准的前提下优化纤维用量；其次，结合引入掺加引气剂技术，进一步提高桥面混凝土的耐久性。最后通过依托工程和省内其他现场试验，提出寒区纤维增强混凝土桥面铺装设计、施工技术指南。
[Abstract]:In recent years, the bridge construction in our country has developed rapidly and the structure form has been innovated constantly. However, in the bridge design, most of the bridge deck pavement design uses the traditional form, does not make the special calculation, only refers to the construction request.However, with the increase of traffic volume, the problem of bridge deck pavement is becoming more and more serious, which can not reach the design life of the related deck pavement, which not only affects the normal use of the bridge, but also causes the bridge traffic accident.At the same time, it brings great inconvenience to the maintenance of bridge.The bridge deck pavement problem has become a key problem affecting the normal use of bridges, and should be paid more attention to in the future bridge design work.Firstly, through the extensive investigation of bridge deck pavement in Heilongjiang Province, the elastic theory is used to analyze the stress and failure mechanism of cement deck on different bridge structures (beam bridges).Three types of cement concrete deck pavement structures of highway girder bridges are proposed, which are simple supported structure, simple support and continuous structure, which are suitable for the environment and engineering characteristics of high cold region.Then, through laboratory tests, the mixing ratio theory of steel fiber cement concrete and polypropylene fiber cement concrete, the influence factors of mix ratio and the design method of mix ratio are studied respectively.The impact test and flexural modulus test were used to evaluate the toughness and systematic evaluation of fiber reinforced concrete, and the durability of fiber reinforced concrete for bridge deck pavement was systematically evaluated by quick freezing method and permeability coefficient.At the same time, under the premise of meeting the technical standard of bridge deck concrete, the fiber dosage is optimized. Secondly, the durability of bridge deck concrete is further improved by introducing the technology of adding air entraining agent.Finally, by relying on the engineering and other field tests in the province, the technical guide for the design and construction of fiber reinforced concrete bridge deck pavement in cold area is put forward.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U443.33

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