铁道建筑技术
鐵道建築技術
철도건축기술
RAILWAY CONSTRUCTION TECHNOLOGY
2012年
4期
65-68
,共4页
盾构施工%砂卵石地层%地表沉降%对策
盾構施工%砂卵石地層%地錶沉降%對策
순구시공%사란석지층%지표침강%대책
shield tunnelling%sand cobble stratum%settlement%countermeasure
盾构法隧道施工时地表沉降仍然是施工控制中的突出问题之一。砂卵石地层中,由于地质条件的特殊性,地表沉降具有滞后性、隐蔽性、突发性,危害极大,是工程中急待解决的问题。结合成都地铁1号线盾构隧道的工程实践,对地表沉降进行监控量测,并对监控数据进行统计分析,找出变化规律,有针对性地采取相应的治理措施,较好地解决了富水砂卵石地层地表沉降问题。
盾構法隧道施工時地錶沉降仍然是施工控製中的突齣問題之一。砂卵石地層中,由于地質條件的特殊性,地錶沉降具有滯後性、隱蔽性、突髮性,危害極大,是工程中急待解決的問題。結閤成都地鐵1號線盾構隧道的工程實踐,對地錶沉降進行鑑控量測,併對鑑控數據進行統計分析,找齣變化規律,有針對性地採取相應的治理措施,較好地解決瞭富水砂卵石地層地錶沉降問題。
순구법수도시공시지표침강잉연시시공공제중적돌출문제지일。사란석지층중,유우지질조건적특수성,지표침강구유체후성、은폐성、돌발성,위해겁대,시공정중급대해결적문제。결합성도지철1호선순구수도적공정실천,대지표침강진행감공량측,병대감공수거진행통계분석,조출변화규률,유침대성지채취상응적치리조시,교호지해결료부수사란석지층지표침강문제。
Settlement is still one of the important problems to be controlled during shield tunnelling. For the characteristics of geologic condition in sand and cobble stratum, the settlement has the features ： hysteresis, concealment, and abruptness. So the problem becomes an urgent problem to be solved. Based on the practice of Chengdu Metro Line 1 and Line 2, the settlements are measured and the data are summarized and analyzed. The settlement laws are found out, which provide the basis to take measures to solve the settlement. The measures can reduce the settlement effectively.
