科技通报
科技通報
과기통보
BULLETIN OF SCIENCE AND TECHNOLOGY
2015年
5期
102-105
,共4页
周阳敏%王哲%王哲%蒋帅华
週暘敏%王哲%王哲%蔣帥華
주양민%왕철%왕철%장수화
浅埋隧道%大断面%有限元%中隔墙台阶法%上下台阶法
淺埋隧道%大斷麵%有限元%中隔牆檯階法%上下檯階法
천매수도%대단면%유한원%중격장태계법%상하태계법
shallow buried tunnel%large section%finite element method%method of partition steps%bench method
浅埋大断面隧道由于明显的空间效应以及断面面积、高跨比、跨度、埋深、施工方法等因素的不同，隧道在围岩和支护结构的破坏模式上常出现较大的差别。本文通过对宁波大榭管廊浅埋大断面隧道进行有限元方法，模拟经济简单的中隔墙台阶法和上下台阶法，对拱顶沉降及初次支护的受力状态进行分析，并与实际监测数据进行对比分析，得出较为一致的结果。最后，通过对比分析，得出中隔墙台阶法能有效减少拱顶沉降及初次支护应力，各项变形指标均在规范之内。本研究对此类隧道的施工与设计有一定指导意义。
淺埋大斷麵隧道由于明顯的空間效應以及斷麵麵積、高跨比、跨度、埋深、施工方法等因素的不同，隧道在圍巖和支護結構的破壞模式上常齣現較大的差彆。本文通過對寧波大榭管廊淺埋大斷麵隧道進行有限元方法，模擬經濟簡單的中隔牆檯階法和上下檯階法，對拱頂沉降及初次支護的受力狀態進行分析，併與實際鑑測數據進行對比分析，得齣較為一緻的結果。最後，通過對比分析，得齣中隔牆檯階法能有效減少拱頂沉降及初次支護應力，各項變形指標均在規範之內。本研究對此類隧道的施工與設計有一定指導意義。
천매대단면수도유우명현적공간효응이급단면면적、고과비、과도、매심、시공방법등인소적불동，수도재위암화지호결구적파배모식상상출현교대적차별。본문통과대저파대사관랑천매대단면수도진행유한원방법，모의경제간단적중격장태계법화상하태계법，대공정침강급초차지호적수력상태진행분석，병여실제감측수거진행대비분석，득출교위일치적결과。최후，통과대비분석，득출중격장태계법능유효감소공정침강급초차지호응력，각항변형지표균재규범지내。본연구대차류수도적시공여설계유일정지도의의。
Due to its many complicated factors of the large section of shallow buried tunnel, So In this paper, the finite element method is used to simulate the Ningbo Daxie large section pipe gallery tunnel which is shallow buried. It is used that the state of method of partition steps and benching tunneling method , to analyze the vault subsidence and the stress of initial support of surrounding rock. The finite element method simulation was in accordance with the results of actual monitoring data. Finally, it is concluded that the application of method of partition steps could reduce the vault subsidence and the stress that is supported the first time, and the deformation index is within the specification. This study has certain guiding significance to the design and construction of such kind of tunnel.
