西游洞特大桥施工控制技术研究

发布时间：2018-04-10 16:29

本文选题：施工监控 + 敏感参数　；参考：《重庆交通大学》2014年硕士论文

【摘要】：在国家大力推进城镇化的过程中我国交通事业又取到长足发展,同时伴随着发展的主要方向从东部沿海地区向内陆推进,施工难度也在不断加大,施工条件也更为复杂,如何在这样的环境当中修建跨径更大,经济上更为合理的预应力连续刚构桥成为广大施工人员和科研人员共同面对的问题。随着施工控制技术的逐步推广,这个问题也正在得到解决。但是这类桥梁一般都是施工过程复杂,修建周期较长的大跨径桥梁。如何在这样一个时间跨度内保证施工质量以及后期运营阶段的质量就显得尤为重要。在预应力连续刚构桥施工过程中最主要面对的问题就是,桥梁分阶段施工过程中每一个阶段施工都会对已成结构以及后续阶段施工造成影响,这种影响就会让实际结构当中的内力、变形值与理论计算值存在一定误差,误差积累到一定程度就会造成整个桥梁结构不可逆的损害,使施工无法顺利继续,或者让成桥状态与设计要求相去甚远,达不到设计要求。针对上面提到的问题,本文从预应力连续刚构桥的特点及发展概况,开始介绍桥梁施工控制如何在预应力连续刚构桥的施工中起作用。主要介绍了桥梁施工控制的方法及分类,以及预应力连续刚构桥的建模分析方法。本文是以云南武定西游洞特大桥作为工程背景,运用正装计算法采用桥梁博士v3.0进行建模分析。同时现场测试结构设计计算参数,通过模型分析这些参数当中的敏感参数。对于识别出的敏感参数在实际施工控制当中要加大观测力度,及时对出现的误差进行修正,并反馈给设计单位以及施工单位,让他们做出相应调整,保证整个施工过程的安全可靠,同时让桥梁的成桥状态满足设计部门的要求。在具体实施西游洞特大桥施工监控过程中,介绍施工监控的意义,以及本文所涉及到的仪器设备简介以及施工监控所需测点的布设方法及位置。收集有关分析所需要的数据,并用科学合理的方式进行后期数据处理。依据西游洞特大桥施工控制现场采集的实测数据与模型分析得到的理论结果进行对比分析,主要是针对应力以及线性变化之间的误差程度,保证桥梁施工在可控范围之内,同时保证后续运营也能满足设计要求。
[Abstract]:In the country to vigorously promote the transportation industry in our country the process of urbanization and the rapid development, with the main direction of development to advance from the eastern coastal areas to inland, the difficulty of construction is also increasing, the construction conditions are more complex, how in this environment to build larger span, more economical reasonable construction of prestressed concrete continuous rigid frame bridge has become the majority of workers and researchers face the common problem. With the gradual promotion of construction control technology, this problem is also solved. But this kind of bridge is generally complicated construction process, long span bridges with longer periods. How to ensure the quality of construction quality and operation of the late stage is particularly in such a time span. In the process of construction of prestressed continuous rigid frame bridge is the main problem facing is the bridge in the construction process of each stage A stage construction will have an impact on the structure and the subsequent construction has become a stage, this effect will make the actual structure of the internal force, deformation values and theoretical values of some error, the error will be accumulated to a certain extent caused irreversible damage to the whole bridge structure, so the construction could not continue, or let the bridge and the design demands, reach the design requirements. According to the problems mentioned above, this article from the characteristics and development of prestressed concrete continuous rigid frame bridge, introduced the bridge construction control in Prestressed Continuous Rigid Frame Bridge in construction work. This paper mainly introduced the method of bridge construction control and classification, analysis and modeling method of prestressed concrete continuous rigid frame bridge this article is based on Yunnan Wuding West hole bridge as the engineering background, the calculation method of using Dr. bridge V3.0 modeling analysis using the same dress. When the field test structure design parameters, through the analysis of the model parameters of these sensitive parameters. The sensitive parameters identified with observation efforts in the actual construction control, timely to the error correction, and feedback to the design units and construction units, allowing them to make corresponding adjustments to ensure that the entire construction process safe and reliable, while the bridge bridge meet the requirements of the design department. In the process of construction monitoring implementation of West hole bridge, the construction monitoring significance, and layout method of equipment are involved in this paper and the construction monitoring required measurement points and position. Collect the required data analysis, and post data processing with the scientific and reasonable way. According to the theoretical results of measured data and analysis of the control model of the collected West Bridge Construction by hole The comparative analysis is mainly aimed at the degree of error between stress and linear change, so that the bridge construction can be controlled within a controllable range, and at the same time, the subsequent operation can also meet the design requirements.

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.4

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