铁道标准设计
鐵道標準設計
철도표준설계
RAILWAY STANDARD DESIGN
2014年
6期
107-110,115
,共5页
暗挖隧道%下穿%既有地铁站%CRD法%全断面注浆%沉降控制
暗挖隧道%下穿%既有地鐵站%CRD法%全斷麵註漿%沉降控製
암알수도%하천%기유지철참%CRD법%전단면주장%침강공제
undermining tunnel%crossing below an existing structure%existing metro station%CRD method%full-face curtain grouting%settlement control
通过对暗挖隧道下穿既有站采用不同工法及不同加固范围的计算分析比较，并依据地铁站结构变形控制值，来确定暗挖隧道下穿既有站沉降控制措施。结果表明，采用CRD工法开挖，较全断面法及台阶法对控制竖向位移效果显著；隧道掌子面及周边一定范围土体采用深孔注浆加固，可以有效控制既有车站结构及轨道竖向变形，满足既有线结构使用和运营要求。
通過對暗挖隧道下穿既有站採用不同工法及不同加固範圍的計算分析比較，併依據地鐵站結構變形控製值，來確定暗挖隧道下穿既有站沉降控製措施。結果錶明，採用CRD工法開挖，較全斷麵法及檯階法對控製豎嚮位移效果顯著；隧道掌子麵及週邊一定範圍土體採用深孔註漿加固，可以有效控製既有車站結構及軌道豎嚮變形，滿足既有線結構使用和運營要求。
통과대암알수도하천기유참채용불동공법급불동가고범위적계산분석비교，병의거지철참결구변형공제치，래학정암알수도하천기유참침강공제조시。결과표명，채용CRD공법개알，교전단면법급태계법대공제수향위이효과현저；수도장자면급주변일정범위토체채용심공주장가고，가이유효공제기유차참결구급궤도수향변형，만족기유선결구사용화운영요구。
In this paper, different construction methods and different strengthening ranges, which might be used for an undermining tunnel crossing below an existing metro station, were calculated, analyzed and compared with each other. And then based on structure deformation control value of metro station, this paper determined the settlement control measures of the undermining tunnel crossing below the existing metro station. The analysis result shows that: ( a) The CRD method is much more superior to both the full face method and the bench cut method for controlling vertical displacement. ( b) By the use of deep-hole grouting to strengthen the working face and the certain range of soils around it, the vertical deformations of both the existing station structure and the track can effectively be controlled, meeting the functional and operational requirements of the structure of the existing metro line.
