Research On Assemblyaccuracy Control Technology Of Large Multi-layer Steel Structure In Non-sliding Region

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.