| 考虑围岩破坏条件时优化小净距隧道最小净距的研究 |
| 投稿时间：2007-12-07 点此下载全文 |
| 引用本文：门妮,代树林,佴磊.考虑围岩破坏条件时优化小净距隧道最小净距的研究[J].钻探工程,2008,35(8):73-76.MEN Ni,DAI Shu-lin,NAI lei. Study on Super-small Interval in Optimized Small Interval Tunnel with Surrounding Rock Damage[J]. Drilling Engineering, 2008,35(8):73-76. |
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| 中文摘要:小净距隧道由于不受地形条件以及总体线路线型的限制，较连拱隧道有施工工艺简单、造价较低等优点，越来越受到青睐。用有限单元法对小净距隧道不同中柱厚度进行数值模拟，通过格里菲斯破坏判据以及德鲁克-普拉格判据，拟合出最大拉应力及各判据屈服函数与净距的拟合曲线，在保证其稳定的基础上，对小净距隧道最合理净距做出分析。 |
| 中文关键词:小净距隧道 有限单元法 破坏判据 合理净距 |
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| Study on Super-small Interval in Optimized Small Interval Tunnel with Surrounding Rock Damage |
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| Abstract:Construction technology of small internal tunnel is more favorable because of its simple and economy than double-arched tunnel without limitation on topographical condition and line type. Numerical simulation was made on the thickness of mid-pillars in small internal tunnel with finite element method; fitting curve of maximum tensile stress, yield function criteria and small interval was obtained through Griffith damage criteria and Drucker-Prager criteria. And analysis was made on most reasonable interval of small interval tunnel. |
| keywords:small interval tunnel finite element method damage criteria reasonable small interval |
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