| 小相寨隧道进口段管棚支护参数优化分析 |
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| 引用本文： | 孙士成,杨钊,姜安龙. 小相寨隧道进口段管棚支护参数优化分析[J]. 南昌航空工业学院学报, 2009, 23(1): 79-83 |
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| 作者姓名： | 孙士成 杨钊 姜安龙 |
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| 作者单位： | 中交一航局第二工程有限公司,山东,青岛,266000;同济大学地下建筑与工程系,上海,230092;南昌航空大学隧道及地下工程研究所,江西,南昌,330363 |
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| 摘 要： | 太中银小相寨1号隧道出口段围岩稳定性差,地形坡度大,洞口覆盖层薄,进洞困难,施工中采用大管棚进行超前加固处理.根据初始设计管棚参数,采用二维弹塑性有限单元法,对管棚设置范围、环向间距、注浆浆液扩散半径进行参数优化.优化结果表明:管棚设置范围、环向间距、注浆浆液扩散半径均存在一最优值,当没计参数值超过这一最优值时,设计参数的变化对拱顶下沉量的影响明显减小.因此不能一味地提高没计参数来增加隧道结构的可靠性.
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| 关 键 词： | 管棚 超前支护 管棚设置范围 管棚环向间距 浆液扩散半径 |
Analysis on Parameter Optimization of Shed-pipe Advance Support in Portal Section at Xiaoxiangsai Tunnel |
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| SUN Shi-cheng,YANG Zhao,JIANG An-long. Analysis on Parameter Optimization of Shed-pipe Advance Support in Portal Section at Xiaoxiangsai Tunnel[J]. Journal of Nanchang Institute of Aeronautical Technology(Natural Science Edition), 2009, 23(1): 79-83 |
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| Authors: | SUN Shi-cheng YANG Zhao JIANG An-long |
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| Affiliation: | 1.NO.2 Engineering Company;Ltd.Of CCCC First Harbor Engineering Company;Qingdao;Shandong265510;China;2.Department of Geotechnical Engineering;Tongji University;Shanghai 20092;3.Insitute of Tunnel and Underground Engineering;Nanchang Hangkong Univasity;Nanchang;Jiangxi 330063;China |
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| Abstract: | Because the stability of the surrounding rock is poor,the degree of the slope is big,and the thickness of the overburden is thin,the long shed-pipe is applied in construction for pre-reinforced supporting.Based on the initial design parameters of shed-pipe and using the 3D elastic-plastic finite element method,the parameters of range,space in the circumferential direction and the diffused radius of grout are optimized.The study result shows that there is a optimized value on the range,space in the circumfer... |
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| Keywords: | shed-pipe pre-reinforced supporting arrangement area space in the circumferential direction grout diffused radius |
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