【作者】 柴志伟；

【导师】 章青；

【作者基本信息】 天津大学 ， 机械工程， 2012， 硕士

【摘要】 随着经济的发展,大型多层钢结构在各种场馆建筑、集成化工业厂房等方面得到了越来越多的应用。由于大型多层钢结构各层的制造误差和安装误差的积累,在合理的建造效率下,实现钢结构的安装精度非常困难,非滑道区域建造的地基沉降加大了这一难度,所以安装精度控制是非滑道大型多层钢结构建造的主要技术难点。本研究通过采用合理的安装技术和变形控制手段降低建造难度,并使用空间测量的技术获得大型钢结构建造的位置和误差信息,基于最小二乘法建数学模型对安装定位进行优化,减少误差,指导钢结构安装并预先修整结构层,达到提高精度和效率的目的。本文的主要研究内容有:1.为实现大型多层钢结构建造的精度监控而采用的三维测量技术,包括:建立测量控制网,并实现控制点的高程传递,从而建立测量体系;为保证测量不受杆件阻碍而采用的自由设站等测量技术;为获得制造和安装信息而使用的甲板片测量技术和测量数据在不同坐标系间的匹配方法。2.为了保证非滑道大型多层钢结构顺利建造并满足精度要求而采用的安装技术,包括:钢结构安装的整体工艺流程和立柱插接技术;为调整制造误差而使用的钢结构误差矫正方法。3.针对非滑道建造过程建立桩土耦合的有限元模型,对建造过程的变形进行分析,并使用临时支撑等手段,减少结构物竖向变形,减少地基的不均匀沉降;采用测量技术,对结构和设备安装时的地基沉降和结构变形进行监控,保证安装精度,为下一层结构的安装的降低难度。4.以测量数据为基础,基于最小二乘法和空间坐标变换,建立精度优化的目标函数,并以安装技术要求为约束方程,实现了提高安装精度的定位优化。5.基于AutoCAD二次开发的精度控制软件的实现,包括:包含模型导入、结构分层、精度点设定的三维模型处理模块的开发;实现测量数据导入和匹配的测量数据处理模块的开发;实现了提高建造精度的定位优化和误差分析模块的开发;实现数据储存、调用和显示的数据库和数据管理模块的开发。6.以镍矿工程的3M102模块为例,展示模块的建造过程和大型多层钢结构建造过程精度控制软件的使用及结果。更多还原

【Abstract】 With the development of the economic, the application of large steel structure with multi-layers has become more and more widely in various construction of buildings and integrated industrial plants. As error accumulation of large steel structure with multi-layers when manufacturing and installing, it is very hard to realize the accuracy of installation in responsible constructing efficiency, what’s more, the foundation settlement in non-sliding region makes it become much more difficult. Therefore, it becomes the key technical difficulty to control the installation accuracy when constructing large steel structure with multi-layers in non-sliding region. The reasonable installation technology and deformation controlling method have been used to reduce the difficulties in construction. The position error when constructing large steel structure can be obtained through space measuring technology. The model based on the least square method optimizes the installation location and reduces the position error. Through the method, the layers of large steel structure can be preliminarily adjusted in order to improve the installation accuracy and efficiency.The main research of this paper can be included as follows:1. in order to realize controlling the construction accuracy, there-dimensional measurement technology has been established which contains: establishing the measurement system aims at establishing measurement control network and realizing the elevation transferring of the control point; measuring methods such as free stationing can ensure the measuring process successful; in order to obtain the manufacturing and installing information, the method of measuring the deck matches to measuring data in different coordinate system.2. the installation technology that insures the process of construction successfully contains: the whole installation process and the technology of plugging column with another; the error redressing method which can ensure the installation accuracy.3. The pile-soil coupling finite element model has been established to analysis the construction deformation. In order to reduce the vertical deformation and foundation settlement, the method of adding temporary support has been carried out which can also reduce the difficulty of installation. 4. Taking measuring data as premise, the objective function to optimize for accuracy has been established. Taking technical requirements as constraint equations, the positioning optimization has been realized.5. Based on AutoCAD secondary development, the software of accuracy controlling has been achieved that contains: three-dimensional model has been developed including model importing, layering and accuracy point settling; measuring data imported and matching data processing module developing have been realized; Poisoning optimization for improving construction accuracy and error analysis model have been developed; database for data storage, transfer and display has been developed as well as data management model.更多还原