大跨度预应力砼连续刚构桥梁病害分析及处理技术研究

发布时间：2018-03-03 21:27

本文选题：预应力砼连续刚构桥梁　切入点：病害分析　出处：《南昌大学》2017年硕士论文　论文类型：学位论文

【摘要】：大跨度预应力砼连续刚构桥梁与连续梁桥相比,具有不设置桥梁伸缩装置、车辆行驶平整顺畅、设计时采用墩梁固结不设置桥梁支座、施工便利的优势,而且又具备很大的纵向抗弯刚度和横向抗扭刚度,在相同条件下具备省材料、施工简单、养护成本较低等特点,自上世纪九十年代以来,以其独特的优势在我国桥梁史上得到快速的发展。但是,在我国已建成的大跨度预应力砼连续刚构桥梁中,箱梁底板砼开裂、崩裂、甚至底板砼完全脱落的情况非常普遍,严重影响到桥梁的正常使用,大大缩短了桥梁的设计使用寿命,无形中增加了桥梁的管理运营养护成本。本文以某大跨度预应力砼连续刚构桥梁病害处理过程为例,主要进行了以下几个方面的研究工作:对大跨度预应力砼连续刚构桥梁病害情况进行了全面的调查及检测,为后续病害的处理提供最原始最准确的基础资料。对桥梁当时的状况进行了静力荷载试验,全面分析桥梁的强度、刚度以及弹性工作状态。根据桥梁静力荷载试验数据及结论,结合桥梁病害情况,从理论、设计、构造、施工等各个方面分析桥梁病害出现的原因。对桥梁的各种病害进行了有针对性的处理,对处理方案的原理、施工工艺进行了详细的阐述。从外观、运营监控数据、病害处理前后的静力荷载试验数据几个方面对桥梁病害处理的效果进行评价。
[Abstract]:Compared with the continuous rigid frame bridge, the long-span prestressed concrete continuous rigid frame bridge has the advantages of not setting up the bridge telescopic device, smooth running of the vehicle, and the advantages of using the pier beam to consolidate the bridge support and not to set the bridge support, so that the construction is convenient. And also has the very big longitudinal bending rigidity and the transverse torsional rigidity, under the same condition has saves the material, the construction is simple, the maintenance cost is low and so on, since -10s, Because of its unique advantages, it has been developed rapidly in the history of bridges in our country. However, in the long-span prestressed concrete continuous rigid frame bridges built in our country, the box girder floor concrete cracking, cracking, and even the floor concrete falling off completely is very common. It seriously affects the normal use of the bridge, greatly shortens the design life of the bridge and increases the maintenance cost of the bridge management and operation invisibly. This paper takes the disease treatment process of a long-span prestressed concrete continuous rigid frame bridge as an example. The main research work is as follows: the disease of long-span prestressed concrete continuous rigid frame bridge is investigated and detected. This paper provides the most original and accurate basic data for the treatment of subsequent diseases. The static load test of the bridge at that time is carried out, and the strength, stiffness and elastic working state of the bridge are comprehensively analyzed. According to the static load test data and conclusions of the bridge, According to the condition of bridge diseases, this paper analyzes the causes of bridge diseases from the aspects of theory, design, construction and construction. The construction technology is described in detail, and the effect of bridge disease treatment is evaluated from the aspects of appearance, operation monitoring data and static load test data before and after the disease treatment.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U445.71

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