铁道建筑技术
鐵道建築技術
철도건축기술
RAILWAY CONSTRUCTION TECHNOLOGY
2014年
12期
33-35
,共3页
先填后挖法%超前大管棚%轻质混凝土
先填後挖法%超前大管棚%輕質混凝土
선전후알법%초전대관붕%경질혼응토
post-filling excavation method%advanced large pipe shed%light concrete
在隧道埋深较大位置出现大塌方，地表无法直接注浆回填和明挖时，选用具有较好流动性的轻质混凝土材料，超前灌筑满塌方顶部空腔及固结已塌方的石碴，同时设置超前大管棚贯通整个塌方体，将塌方段处理转换成隧道常规的软弱围岩暗挖施工，通过采用合理的开挖工法和安全控制措施，极大降低了塌方处理的风险。
在隧道埋深較大位置齣現大塌方，地錶無法直接註漿迴填和明挖時，選用具有較好流動性的輕質混凝土材料，超前灌築滿塌方頂部空腔及固結已塌方的石碴，同時設置超前大管棚貫通整箇塌方體，將塌方段處理轉換成隧道常規的軟弱圍巖暗挖施工，通過採用閤理的開挖工法和安全控製措施，極大降低瞭塌方處理的風險。
재수도매심교대위치출현대탑방，지표무법직접주장회전화명알시，선용구유교호류동성적경질혼응토재료，초전관축만탑방정부공강급고결이탑방적석사，동시설치초전대관붕관통정개탑방체，장탑방단처리전환성수도상규적연약위암암알시공，통과채용합리적개알공법화안전공제조시，겁대강저료탑방처리적풍험。
When big collapse occurs in deep buried tunnel and there is no condition for backfill grouting or cut &cover tunnels,light concrete with good liquidity should be used to pre-grout the top empty cavity and consolidate the collapse slag fully;meanwhile,the advanced large pipe shed should be set through the whole collapse.In this way,the collapse con-struction is converted to underground excavation for regular tunnel weak surrounding rock.It can reduce the risks of col-lapse treatment to the utmost by reasonable excavation method and safety control measures.
