综合管廊共构段基坑回填施工工艺及质量控制措施

Construction Technology and Quality Control Measures of Backfilling Foundation Pit in Co-Construction Section of Utility Tunnel

北京大兴国际机场配套基础设施首创性地将"高铁、轻轨、高速公路、城市道路、地下综合管廊"以共构共廊形式规划建设在一起。以北京大兴国际机场高速公路地下综合管廊高架共构段为依托,根据基坑不同区域针对性地采用素填土、级配砂石、低等级混凝土等回填材料,介绍基坑回填主要施工工艺及相应质量问题,并给出相应的控制措施,取得了良好效果。

The supporting infrastructure of Beijing new airport is the first to plan and build "high-speed railway,light rail,expressway,urban road and utility tunnel" in the form of a common corridor. Based on the co-construction section of the underground utility tunnel of Beijing New Airport Expressway,according to the targeted use of backfill materials such as plain fill,graded sand-gravel and low-grade concrete in different areas of the foundation pit,the main construction technology and corresponding quality problems of the foundation pit backfill are introduced,and gives the corresponding control measures,which has achieved good results.