| Airport station site requirements for settlement and differential settlement of the foundation soil is higher, with the construction of the Mountain Airport, a large area of embankment and fill height slope foundation soil study and successful completion of Jiuzhaigou Huanglongtypical airport. On local construction excavation supporting projects of deep embankment soil subsidence deformation and impact studies on structures less.This thesis on, fast iron Airport, Chengdu Shuangliu Airport Chengmianle site excavation pit backfill settlement deformation, especially the non-uniform deformation on structures research is theoretical and practical significance. The thesis intends to adopt on-site investigation, the airport and the pit filling information and data collection, analysis, density test data, on-site analysis and numerical calculation to study different fill thickness settlement deformation and differential deformation, while the non-uniform deformation of the pipeline and the drainage culvert structures, and then come to a reliable, economical and reasonable treatment options. The results of this study are as follows:1. Using layered summation and fill the maximum density method backfill settlement. In the calculation of the sum of the hierarchical method, consider the aircraft load, use BISAR3.0program to calculate the pavement aircraft load caused additional stress in the backfill. Use of existing test data, derived using curve fitting each detection point backfill the degree of compaction of the linear equation to calculate the settlement of backfill. The results can be seen Either way, backfill settlement values are too large, and the difference, does not meet the requirements of the airport building, adversely affect the safe operation in aircraft.2. Comparative analysis of two different methods to calculate the settlement of backfill, and analysis of the two methods calculate the the backfill settlement of differences.3. Calculated according to the theory of backfill settlement, the size of the analysis of differential settlement, and analysis of uneven settlement of the pavement structure layer, drainage culvert, the impact of the pipeline. From the results it can be seen, the uneven settlement of the foundation, structural layer, box culvert will have a lot of internal forces, box girder cracks, and even box culvert severely deformed, distorted, or even break, causing serious engineering accidents.4. The use of finite element software ANS YS established the Shuangliu Airport station site-backfill-tunnel interaction analysis model FLAC3D finite difference software backfill settlement, as well as uneven settlement of the station site structure backfill, andresults and theoretical calculations were analyzed. |
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