软土地区公路施工期沉降影响因素分析

摘要

Based on the monitored systematically for a highway construction project, analysis the influences of hard crust thickness, embankment height, thickness of soft soil layer and foundation treatment methods on the subgrade settlement during construction. A empirical formula is proposed to predict the subgrade settlement during construction. The fitting results with the measured data show that:the proposed empirical formula can reflect the subgrade settlement characteristics during construction well, and the influences of site and construction conditions can be also considered in the empirical formula.%基于沿海某高速公路工程,对沿线各标段施工期路堤沉降进行系统性观测,分析硬壳层厚度、软土厚度、路堤填筑高度、地基处理方式等因素对路堤沉降的影响,根据观测结果提出相应施工期路堤沉降的经验公式.拟合分析结果表明该法能较好地反映施工期路堤沉降特性,并能考虑不同场地和施工因素对沉降变形特性的影响.