承德机场高填方地基工后沉降预测

目前我国机场建设正处于迅猛发展阶段,机场高填方工程屡见不鲜,然而对于高填方工程的地基沉降计算研究却不够完善。河北省承德机场具有以下工程特点:(1)原地基无特殊性岩土且进行地基处理,(2)填筑体以硬质岩为主。以高填方工程工后沉降现场监测资料为基础,研究了不同回归参数模型对高填方地基工后沉降数据拟合的合理性,在指数模型、幂函数模型、对数模型、双曲线模型、平方根模型中,指数模型能够真实的反映此类高填方工程工后地基沉降规律。由预测结果及沉降影响因素可知,此类工程工后沉降组成以填筑体压缩固结为主,填筑体厚度为工后沉降的主要影响因素,填筑体厚度变化较大处工后差异沉降相对显著。

Post-construction Settlement Prediction of the High Embankment of Chengde Airport

There are more and more high embankment airport while Chinese airport construction is in the rapid development stage.However,further research of settlement calculation for high embankment is still not perfect.Chengde airport of Hebei province has the following features:(1) original ground is not geologically special and the foudation is treated,(2) the filler is mainly hard rock.Based on the in-situ monitoring data of the post-construction settlement of the high embankment,some regressive parameter models are discussed to predict the post-construction settlement.Among exponential model,power function model,root-squaring model,hyperbolic model,exponential model can best reflects the post-construction settlement laws of the high embankment.According to the predicting results and influencing factors,compression and solidation of filling body is the main reason of post construction settlement,and the thickness of the filling body is the main influencing factor.The thicker the upper filled soil,the more remarkable the differential settlement.