桩板结构在公路软土地基处理中的应用研究

Research on the Application of Pile-Sheet Structure in the Treatment of Highway Soft Soil Foundation

软土地基的沉降情况复杂,为了降低软土地基的沉降量,特根据室内模拟试验和控制变量法进行研究,本试验采用桩板结构作为处理公路软土地基的方法,通过改变板的厚度和桩间距的大小以及桩的布置形式来研究桩板结构对于软土地基沉降量的影响,基于室内模拟试验得出以下结论:经过桩板结构处理后的软土地基沉降量降低,承载力明显提高;软土地基的沉降量与板的厚度成负相关,即随着板的厚度增大沉降量降低,但板的厚度增加到一定程度后,沉降量不会再发生明显变化;软土地基的沉降量与桩间距成正相关,即沉降量随着桩间距降低而降低;桩体按照三角形布置的沉降量要低于按照长方形布置的沉降量。

The settlement of soft soil foundation is complex.In order to reduce the settlement of soft soil foundation,the research is carried out according to the indoor simulation test and the control variable method.In this experiment,the pile-slab structure is used to deal with the soft soil foundation of the highway.The influence of the pile-slab structure on the settlement of the soft soil foundation was studied by the thickness,pile spacing and the arrangement of the piles.Based on the indoor simulation test,the following conclusions were drawn.The settlement of the soft soil foundation treated with the pile-slab structure is reduced,and its load-bearing capacity increases significantly;The settlement of soft soil foundation is negatively correlated with the thickness of the slab,that is,the settlement decreases with the increase of slab thickness.However,after the slab thickness increases to a certain extent,the settlement will not change significantly;The settlement of the soil foundation is positively correlated with the pile spacing,that is,the settlement decreases with the decrease of the pile spacing;The settlement of the piles arranged in a triangle is lower than that in a rectangular arrangement.