| 地铁盾构隧道小偏角近距离上穿既有隧道施工顺序研究 |
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| 引用本文： | 张春雷.地铁盾构隧道小偏角近距离上穿既有隧道施工顺序研究[J].中国勘察设计,2011(3):82-85. |
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| 作者姓名： | 张春雷 |
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| 作者单位： | 铁道第三勘察设计院集团有限公司城交分院 |
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| 摘 要： | 以北京地铁四号线盾构隧道与九号线暗挖隧道"小角度、近间距、长距离"空间立交施工为背景,采用数值模拟方法对三种施工顺序进行了计算,重点分析了其施工过程中地表沉降、土体塑性区分布、衬砌结构应力等指标。计算表明,先施工下方九号线暗挖隧道,再施工上方四号线盾构隧道,且在上方四号线的左线盾构机通过后再施作九号线二衬的施工方案是比较合理的。
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| 关 键 词： | 盾构隧道 暗挖隧道 空间交叉 施工顺序 |
STUDY ON CONSTRUCTION SEQUENCE OF SHIELD TUNNEL CROSSING OVER EXITING TUNNEL IN SMALL-ANGLEAND CLOSE RANGE |
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| Abstract: | Base on the spatial crossing construction between the shield tunnel of Line 4 and the underground excavated tunnel of Line 9 of the Beijing Subway, which features Small-angle, Close range and Long distance three construction sequences are numerical simulated and analyzed. The ground surface settlement, soil plasticity distribution and stress of lining structure are analyzed emphatically. Then the suitable construction schemes are presented. The construction of the lower mining tunnel of Line 9 should preced... |
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| Keywords: | shield tunnel mining tunnel spatial cross construction sequence |
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