| 近距离下穿既有隧道的盾构施工参数研究 |
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| 引用本文： | 孙玉永,周顺华,向科,邹春华.近距离下穿既有隧道的盾构施工参数研究[J].中国铁道科学,2010,31(1). |
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| 作者姓名： | 孙玉永 周顺华 向科 邹春华 |
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| 作者单位： | 1. 铜陵学院土木建筑系,安徽铜陵,244000;同济大学交通运输工程学院,上海,201804
2. 同济大学交通运输工程学院,上海,201804 |
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| 基金项目： | 上海市申通公司科研项目 |
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| 摘 要： | 采用数值模拟方法分析不同埋深的既有隧道下方土压力分布规律可知:既有隧道对其下方土压力的横向和深度影响范围均为隧道外直径的1.5倍,且沿横向分为3个区域,即接近既有隧道的逐步降低段、穿越时保持最低位和穿出的逐步增加段;既有隧道下方最小土压力与上覆土厚度呈负指数关系,与距离隧道底的间距呈对数关系。根据既有隧道下方土压力的分布规律,提出近距离下穿既有隧道的盾构施工参数设定应分为3个区,并给出各区长度和施工参数建议设定值的计算公式。结合某隧道近距离下穿运营中的既有隧道工程可知,施工参数的实测值与建议设定值吻合较好,且将既有隧道的竖向变形控制在5 mm内。
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| 关 键 词： | 盾构隧道 下穿隧道 施工参数 土仓压力 注浆参数 |
Study on the Construction Parameters of Shield Tunnelling in Short-Distance Undercrossing the Existing Tunnel |
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| SUN Yuyong,ZHOU Shunhua,XIANG Ke,ZOU Chunhua.Study on the Construction Parameters of Shield Tunnelling in Short-Distance Undercrossing the Existing Tunnel[J].China Railway Science,2010,31(1). |
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| Authors: | SUN Yuyong ZHOU Shunhua XIANG Ke ZOU Chunhua |
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| Institution: | SUN Yuyong1,2,ZHOU Shunhua2,XIANG Ke2,ZOU Chunhua2(1.College of Civil Engineering,Tongling University,Tongling Anhui 244000,China,2.School of Transportation Engineering,Tongji University,Shanghai 201804,China) |
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| Abstract: | Using the methods of numerical simulation,earth pressure distribution below the existed tunnel of different buried depth was studied.It is shown that the lateral range and the depth of earth pressure affected by the existing tunnel are both 1.5 times of the tunnel external diameter.The affected partition can be divided into three areas along the lateral direction,including gradually reducing area before traversing,keeping minimum traversing and gradually resuming area after traversing.The relationship betwe... |
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| Keywords: | Shield tunnel Undercrossing tunnel Construction parameter Chamber pressure Grouting parameter |
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