混凝土连续桥梁填石路基周围土体沉降控制方法  

Control Method of Soil Settlement Around Rock-filled Subgrade of Concrete Continuous Bridge

作　　者：罗实 孟祥靖 杨雷 LUO Shi;MENG Xiangjing;YANG Lei(The Third Construction Co.,Ltd of China Construction Third Engineering Bureau,Wuhan 430000,China;Zhong Jiao Jian Ji Jiao Highway Investment Development Co.LTD,Shijiazhuang 050000,China)

机构地区：[1]中建三局第三建设工程有限责任公司,湖北武汉430000 [2]中交建冀交高速公路投资发展有限公司,河北石家庄050000

出　　处：《粉煤灰综合利用》2024年第2期103-106,163,共5页Fly Ash Comprehensive Utilization

摘　　要：为避免桥梁路基沉降导致交通安全隐患,研究混凝土连续桥梁填石路基周围土体沉降控制方法。通过填石路基周围土体应力变化选取适宜填石材料,采用振动压实法压实土体及石料,控制混凝土连续桥梁填石路基周围土体沉降。结果表明:在同等压力作用下,粒径较小的填石材料对填石路基周围土体进行压实效果较好;填石路基周围土体坡率为1∶1.8时,土体稳定系数最高;通过压实填石路基周围土体方法控制沉降,孔隙率及沉降率均符合路基设计规范压实标准;工程结束后一年内填石路基周围土体沉降值较低。In order to avoid the hidden danger of traffic safety caused by the settlement of bridge subgrade,the control method of soil settlement around the rockfill subgrade of concrete continuous bridge is studied.Select appropriate rockfill materials through the change of soil stress around the rockfill subgrade,and compact the soil and stone with vibration compaction method to control the settlement of soil around the rockfill subgrade of concrete continuous bridges.The results show that under the same pressure,the soil around the rockfill subgrade can be compacted easily by the rockfill material with smaller particle size;When the slope ratio of the soil around the rock fill subgrade is 1∶1.8,the soil stability coefficient is the highest;The settlement is controlled by compacting the soil around the rock filled subgrade,and the porosity and settlement rate meet the compaction standard of subgrade design specifications;The settlement value of soil around the rockfill subgrade is low one year after the completion of the project observed by the inclinometer.

关 键 词：混凝土 连续桥梁 填石路基 周围土体 沉降控制 振压实法 

分 类 号：U416[交通运输工程—道路与铁道工程]