岸边填土地基的强度与稳定性加固

岸边混杂填土结构松散,易受地表水流等外界因素的影响,常产生地面沉陷、崩塌和整体滑移等破坏现象.对于这类地基,可先设置散粒材料增强体使其初步硬化,再利用高置换率的复合地基抗滑坝体形成护坡和阻止整体滑移的作用,最后通过低能级强夯处理,将碎石桩复合地基的单一结构改变成具有碎石二合土硬壳层的三层结构,从而可较大程度地提高地基的强度和稳定性.通过对碎石桩夯击破坏性状的分析,提出了确定抗滑复合坝体宽度和夯击处理深度的设计计算方法.

Reinforcement of strength and stability of fill ground beside bank

Because of the porous structure of fill ground beside bank which is easily influenced by river, the settlement, collapse and landslide often occur in the ground. In order to enhance the ground,firstly,the grain strengthening body can be put in. Secondly, a composite soil dam of high replacement ratio can be constructed to protect slope and resist landslide. Finally, the single structure of gravel composite foundation can be changed into three layer structures by lower energe dynamic compaction, which could increase the strength and stability of the ground. According to analyzing destructive attribute of gravel-pile in case of dynamic compaction, a calculation method (about) deciding width of composite dam and depth of dynamic compaction is put forward.