Predictions and Analysis Methods for Subsidence of Reclaimed Airports on Soft Soil Foundation Under Preloading Loads
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摘要: 软土地基填海机场的沉降预测是机场建设所需重点关注的问题。基于厦门某在建机场,通过研究对比实测沉降曲线拟合法、有限元分析法和一维固结理论解析法三种计算软土地基堆载预压期的沉降量及平均固结度,并对目前机场地基固结度进行评价。结果表明:三种预测方法计算得到的沉降量及固结度差异不大,均能够很好预测机场地基堆载预压效果;三种方法的计算结果与实测沉降曲线较为一致,其结果可以相互比较,以用于研究软土地区沉降发展规律;机场在建区域在最后一级堆载预压荷载作用下的平均固结度超过90%,主固结沉降已基本完成。Abstract: Subsidence predictions of reclaimed airports on soft soil foundation is an important issue for airport construction. Based on an airport under construction in Xiamen,the subsidence and average consolidation degrees of soft soil foundation during the preloading period were studied by the measured curve fitting method,finite element analysis method and theoretical calculation method,and the consolidation degree of the current airport foundation was estimated. The results showed that:the subsidence and consolidation degrees calculated by the three methods were in few different,which could well explain the preloading effect of the airport foundation of being preloaded; the calculation results of the three methods were comparatively consonant with the measured results, and the three results could be compared with each other to study the law of subsidence evolution in soft soil areas; the average consolidation degree of the airport construction area subjected to the preloading loads of the last stage had exceeded 90%,and the main consolidation had completed.
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Key words:
- subsidence /
- soft ground /
- airport /
- degree of consolidation
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