滨水高堤路拓宽差异沉降数值模拟及现场监测

Numerical Simulation and Site Monitor of Differential Settlement for High Water front Road Expansion Project

哈尔滨松花江北岸滨江大道是在既有防洪大堤内外加宽形成的集防洪和交通功能的大型工程。在分析既有堤防堤基及堤身地质条件、拓宽位置堤基地质等基础上,选择典型断面采用垂向二维有限元模型,研究分析了清基换土、台阶开挖、平台镇压、土工加筋、防渗排水等差异沉降控制措施效果和相关变形参数,基于路堤填筑过程中地基土和堤身的变形及过程,提出了堆载预压和路面结构层铺筑时间,以及路面排水、反射裂缝控制等措施。现场监测成果结果显示,综合措施可以有效控制滨水路堤差异沉降,防止道路路面纵向裂缝。

A hundred miles of riverside avenue at the north bank of Songhua River in Harbin expanded on existing embankment is a large-scale projects located in the clod area,which not only need to meet the requirements of flood control,but also meet the requirements of traffic. Based on analysis of quality of the old dike body and foundation,expansion foundation,and hydrology,temperature,a 2D vertical mathematical model was developed at typical section,and the results of differential settlement control and related parameters of deformation were simulated for measures of base soil replacement,step excavation,platform repression,preloading,three layers of geotextile reinforcement,seepage drainage. The surcharge preloading and the time for pavement construction was proposed according to the deformation process of foundation and dike body,and proposed other measures such as pavement drainage,reflective crack control. The field monitoring results showed that the implementation of comprehensive treatment technology can effectively prevent cold area of high embankment of old and new waterfront road junction longitudinal cracking.