地基处理方法在河道工程中的应用与研究

Application and Research of Foundation Treatment Methods in River Engineering

上海某河道工程地质条件差、淤泥层厚,河道开挖过程中出现了坡面塌陷先法成型、河底隆起等问题。采用换填法置换淤泥,增加坡面稳定性;采用真空预压法加速土体排水固结,改善土体物理性能;采用钢筋混凝土格埂对撑,保证河道断面成型;采用方桩密打替代传统板粧,阻断淤泥。多种地基处理方法因地制宜综合运用,较好地解决了软土地基难题,保证工程顺利实施。

The geological conditions of a river project in Shanghai are poor with a hig depth of silt.There are problems of slope collapse not able to be formed and river bottom uplift during the progress of river excavation.The replacement method is used to replace the silt and improve the slope stability.The vacuum preloading method is used to accelerate the drainage consolidation and improve the physical properties of soil.The reinforced concrete lattice ridge is used to hold and guarantee the river section to be formed.The closely driving of square pile is used to replace the traditional sheet pile in order to interdict the silt.A variety of foundation treatment methods are comprehensively applied according the local conditions,which better solve the difficulties of soft soil foundation and guarantee the smooth implementation of the project.