基于DGR技术处治桥头跳车沉降预测研究

Research on Settlement Prediction of Bridgehead Bump Based on DGR Technology

宁波属于沿海地区,由于沿海地区软土地基分布广泛且自身承载力不足,随着公路交通量的日益增长,桥头跳车现象越来越普遍。因此,解决桥头跳车病害成为当下紧急而又迫切的重要任务。通过研究桥头跳车机理,对运营期公路采用DGR技术,根据后续实测数据进行拟合,与双曲线模型与指数曲线模型拟合进行比较,通过适宜的曲线模型预测DGR技术处治桥头跳车下的沉降来验证DGR技术在桥头跳车病害处治上的效果以及预测最终沉降量。研究表明,通过DGR技术处治桥头跳车具有较好的效果且曲线模型能较好地预测实际沉降量。

Ningbo belongs to a coastal area.Due to the wide distribution of soft foundation in coastal area and the lack of its own carrying capacity,the phenomenon of bridgehead bump is becoming more and more common with the increasing volume of highway traffic.Therefore,it has become an urgent and important task to solve the problem of bridgehead bump at once.By studying the bridgehead bump mechanism,DGR technology is adopted for the highways in operation period.The fitting is carried out according to the follow-up measured data,which is compared with the hyperbolic model and exponential curve model.The effect of DGR technology on the treatment of bridgehead bump and the final settlement are verified by predicting the settlement of bridgehead bump under the appropriate curve model.The results show that DGR technology to treat the bridgehead bump has a good effect and the curve model can better predict the actual settlement.