蓟汕高速公路大型鱼塘路段软基处置施工技术

Construction Technology of Soft Foundation Treatment for the Section with Large Fish Pond along Jishan Highway

以蓟汕高速公路某大型鱼塘软基处置为背景,对处置方案进行了比选,确定抛石挤淤+堆载预压+泡沫轻质土联合处置技术。对采用抛石挤淤、堆载预压固结、沉降稳定后填筑泡沫轻质土的施工工艺进行了介绍。通过沉降观测,对置换并堆载后软基的沉降规律进行了分析,并用双曲线法进行数据拟合。结果表明:双曲线拟合法预测工后沉降,与实际沉降结果较为吻合。

Taking the soft foundation treatment for a section with large fish pond along Jishan Highway as the background, the paper compared the treatment schemes and then determined the joint treatment technique of jackstone treatment ＋ surcharge preloading ＋ foamed lightweight soil. Herein was the construction technology introduced, which throws stones for packing sedimentation first, surcharges for consolidation, and fills foamed lightweight soil after subsidence stabilized. Through settlement observation, the paper also analyzed the settlement rules of the soft soil foundation after replaced and surcharged, and made data fitting by hyperbolas method. The result shows that Post-construction settlement which the hyperbolas fitting gives the prediction in line with the actual situation and consistent with the measured result of settlement, thus the result of prediction is correct.