法门寺合十舍利塔施工过程模拟与实测分析

CONSTRUCTION PROCESS SIMULATION AND ACTUAL ANALYSIS OF PALMS TOGETHER DAGOBA IN FAMEN TEMPLE

法门寺合十舍利塔工程具有"塔楼折线往复倾斜"、"空间连体"、"大悬臂"等特点,施工工期紧、难度大,特别是超大悬臂结构的超高空大跨度悬挑施工。为保证施工的顺利进行以及施工时结构的位形满足设计要求,建立合十舍利塔主体结构施工过程跟踪模拟分析的有限元模型,对结构施工进行全过程跟踪模拟分析,得出预调值,绘出结构关键点的位移变化曲线,建议在施工过程中,对结构进行局部加强和在79m―84m标高处手心手背之间设置临时连接桁架。现场测量队对整个施工过程中的应力和变形进行跟踪监测,分析实测参数和理论值偏差原因,表明对结构进行施工全过程分析是有必要的,同时也表明施工中采取的相应措施是可行的、合理的。

Palms Together Dagoba in Famen temple is characterized with ＇inclined towers＇, ＇coupling structures＇ and ＇cantilever＇ and so on. The construction of the project is very difficult, especially the construction of the super-weight and super-high-lever cantilever structure. If the structural members are fabricated and erected according to the structural design configuration （SDC） in the construction process, it may lead to a considerable deviation between the structural construction-completed configuration and the SDC. Therefore, a finite element model of a full process construction simulation analysis from the main structure is carried out to ensure the security of the construction. A full process of construction simulation analysis is made to draw the displacement curve of keys in order to guarantee the structure security of the construction process, and recommendations on strengthening the partial structure and setting up the temporary connection truss between the palm and its backside at 79-84 meters high. The scene survey team monitors the internal force and deformation distribution locked in the structure, and analyzes the causes for the difference in elevation between theoretic values and tested values. It is proved that the full process construction simulation analysis is necessary and the corresponding measures performed are feasible and reasonable.