郑州东四环道路管线顶进施工路面升降分析

The Analysis on Pavement Bulge and Settlement of Zhengzhou East 4th Ring Road During Pipeline Jacking Construction

为研究城市道路地下顶管施工过程中路面升降状况,通过建立管线与周围土体的有限元模型,对土体的变形和路面升降规律进行分析。结果表明,路面沿道路横向的最大沉降值出现在管道轴线正上方,且向两侧逐渐减小,这与理论计算公式所反映的情况是一致的。路面整体升降随着顶进长度增加而变化的规律可大致分为逐渐隆起、骤然沉降和沉降趋于稳定3个阶段。

In order to study the bulge and settlement of road surface during the construction of underground pipe jacking in urban road,the finite element model of pipe and surrounding soil was established to analyze the soil deformation and pavement bulge and settlement.The results show that the maximum deformation of the pavement along the lateral direction occurs directly above the pipe axis and decreases gradually form the center to both sides,which is consistent with the results obtained by theoretical formula.The variation of overall bulge and settlement of the pavement with the increment of the jacking length can be roughly divided into three stages:gradual uplift,sudden settlement and settlement tending to be stable.