软土地基上道路桥梁不均匀沉降的施工技术改进

Improvement of the Construction Technology of Soft Soil Foundation Uneven Settlement of Road and Bridge

提出基于分层总和法的道路桥梁地基不均匀沉降预测方法,运用土工合成材料加筋砂垫层方法为软土地基加固。运用分层总和法结合直线变形体理论,将压缩层区域内地基土层实行分层,分别计算各层应力并结合各层变形量可获得复合地基变形沉降量。利用土工合成材料加筋砂垫层施工方法为软土地基加固,分别运用不同土工合成材料加筋砂垫层即土工格室筋砂层、两层土工格栅筋砂层、一层土工格栅筋砂层及无砂筋层进行地基浅层加固实验,实验表明:土工合成材料加筋砂垫层可有效防止软土地基沉降变形,以土工格室筋砂层加固效果最佳。

A prediction method of uneven settlement of road bridge foundation based on layer summation method is put forward. The method of geosynthetic reinforced sand cushion is used to reinforce soft soil foundation. Using the stratified summation method combined with linear deformation theory,compression layer areas soil layering,calculated the stress of each layer and combining each layer of deformation can be obtained for composite foundation settlement the amount of. The use of geosynthetics reinforced sand cushion construction method for soft soil foundation reinforcement,using different geosynthetics reinforced sand cushion that geocell reinforced sand layer,the two layer of geogrid reinforced sand layer,a layer of geogrid reinforced sand and sand reinforced layer shallow foundation reinforcement experiment,experiment show that the geosynthetics reinforced sand cushion can effectively prevent the deformation of soft soil foundation,the geocell reinforced sand reinforcement effect is the best.