浅谈山区高速公路结构物“三背”回填工艺

Discussions on“Three Back”Backfilling Technology of Expressway Structures in Mountain Area

喀斯特地区高速公路结构物"三背"回填技术工艺控制是确保减少工后沉降的关键。文章以广西河池至都安高速公路结构物"三背"回填技术工艺为例,分析回填技术工艺选择对公路的重要性,提出喀斯特地区高速公路结构物"三背"回填技术工艺的一般工序和要求,并结合河池至都安高速公路工程实例,总结了广西喀斯特地区高速公路结构物"三背"回填技术工艺实践经验。

The process control of＂three back＂backfilling technology for expressway structures in karst area is the key to ensure the reduction of post-construction settlement.With the＂three back＂backfilling technology for Hechi-Du＇an Expressway structures in Guangxi as the example, this article analyzed the importance of backfilling technology selection in highway, proposed the general working procedure and requirements of＂three back＂backfilling technology for expressway structures in karst area, then combined with Hechi-Du＇an Expressway engineering example, it summed up the practice experiences of＂three back＂backfilling technology for expressway structures in karst area in Guangxi.