大跨扁平隧道超长管棚法下穿交通干线技术研究

姚志雄; 周岐窗; 黄敏; 罗芷祎; 范兰欣

doi:10.13204/j.gyjzG21081712

大跨扁平隧道超长管棚法下穿交通干线技术研究

doi: 10.13204/j.gyjzG21081712

1. 福建工程学院土木学院, 福州 350118;
2. 地下工程福建省高校重点实验室, 福州 350118;
3. 福建省土木工程新技术与信息化重点实验室, 福州 350118;
4. 中铁二十四局集团福建铁路建设有限公司, 福州 351111

基金项目:

福建省自然科学基金项目(2021J011061)。

国家自然科学基金项目(51504070)

详细信息

作者简介:
姚志雄,男,1978年出生,博士,教授,正高级工程师,硕士研究生导师。电子信箱:3113993@qq.com

计量
- 文章访问数: 74
- HTML全文浏览量: 8
- PDF下载量: 0
- 被引次数: 0
出版历程
- 收稿日期: 2021-08-17

Study on Techniques for Crossing Under Main Lines of Long-Span and Flat Tunnels by the Superly Long Pipe-Shed Method

1. Department of Civil Engineering,Fujian University of Technology, Fuzhou 350118, China;
2. Key Laboratory of Underground Engineering, Fujian Province University, Fuzhou 350118, China;
3. Fujian Provincial Key Laboratory of Advanced Technology and Informatization in Civil Engineering, Fuzhou 350118, China;
4. Fujian Railway Construction Co., Ltd., China Railway 24th Bureau Group Co., Ltd., Fuzhou 351111, China

摘要

摘要: 浅埋隧道下穿重要基础设施时地下结构的稳定性及周边环境变形控制是工程的重点和难点,管棚法是一项提高岩土稳定的重要技术措施。结合福建某大跨扁平超浅埋隧道采用超长管棚法下穿铁路干线的工程实践,分析棚架体系工作原理,总结出超浅埋暗挖隧道超长管棚的施工方法及技术要点。基于Winkler弹性地基梁理论,考虑三步掘进预留核心土施工过程,分析地表沉降规律及隧道支护结构内力分布特性,优化现场支护参数及支护措施设置,结合实测结果验证了计算结果及支护措施的合理性,并结合施工过程及环境特点对地表变形原理进行详细探讨。最后基于实测地表沉降,对超长管棚施做引起的沉降特点及影响因素进行系统分析,结合实际工程特点提出轨道变形控制措施,并从管棚施工技术要点提出地表沉降控制方法。
- 大跨扁平隧道 /
- 超长管棚 /
- 三步掘进预留核心土 /
- 地表沉降 /
- 轨道变形 /
- 控制措施
Abstract: The stability of underground structures and the deformation control of surrounding environments are key and difficult subjects in shallow tunnels crossing below important infrastructures,and the pipe-shed method is an important technical measure, which can improve the stability for the environment of rock and soil. Combined with an engineering practice of a long-span, flat and superly shallow tunnel in Fujian Province, which was used the superly long pipe-shed method to cross below main lines, the working principles of the pipe-shed system were analyzed, and the construction methods and crucially technical points of superly long pipe-sheds in ultra shallow tunnels were summarized and put forward. Based on the Winkler elastic foundation beam theory,considering the construction process of three-step tunnelling to reserve core soil,the laws for subsidence of the earth’s surface and the internal force distribution characteristics of the tunnel support structure were analyzed to guide the setting of support parameters and support measures on site. Based on the measured results, the rationality of the calculation results and support measures were vindicated. Combined with the construction process and environmental characteristics, the principle of the subsidence was discussed in detail. Finally,based on the measured subsidence,the subsidence characteristics and influencing factors caused by superly long pipe-shed construction were analyzed systematically. According to the actual engineering characteristics,the control measures of rail deformation were proposed,and the subsidence control methods were proposed from key points of construction techniques.
- long-span and flat tunnel /
- superly long pipe-shed /
- three step tunnelling to reserve core soil /
- subsidence /
- track deformation /
- control measure

HTML全文

参考文献(15)

[1]	武松,汤华,罗红星,等.浅埋软岩公路隧道超前管棚支护机制与工程应用研究[J].岩石力学与工程学报,2019,38(增刊1):3080-3091.
[2]	肖东辉,孟亚锋,孔德坤,等.T76S自进式螺旋注浆管棚在隧道塌方治理中的应用及支护效果评价[J].现代隧道技术,2020,57(6):214-218.
[3]	余俊,翁贤杰,樊文胜,等.松散地层隧道进洞段管棚注浆加固效应分析[J].山东大学学报(工学版),2020,50(6):1-9.
[4]	MIWA M,OGASAWARA M.Tunneling through an embankment using all ground fasten method[J].Tunneling and Underground Space Technology,2005(20):121-127.
[5]	王健.软弱地层大断面隧道施工工法与支护参数优化研究[D].北京:北京交通大学,2016.
[6]	刘健鹏,杨平,何文龙,等.盾构下穿敏感性建筑的管棚+水平冻结接收技术[J].铁道科学与工程学报,2017,14(10):2194-2202.
[7]	饶为国.管棚-大断面箱涵暗顶技术在下穿公路工程中的应用及分析[J].土木工程学报,2008(4):106-111.
[8]	王道远,袁金秀,王记平,等.考虑施工过程的浅埋软弱隧道管棚变形预测及参数敏感性分析[J].现代隧道技术,2019,56(1):79-86.
[9]	王道远,袁金秀,李俊,等.考虑施工特性的浅埋软弱洞口段管棚变形量预测及工程应用[J].岩石力学与工程学报,2017,36(3):716-724.
[10]	宋战平,田小旭,周冠南,等.隧道洞内管棚超前预支护力学行为的理论分析[J].中国公路学报,2020,33(4):89-98.
[11]	YOO C S.Finite-element analysis of tunnel face reinforced by longitudinal pipes[J].Computers and Geotechnics,2002,29(1):73-94.
[12]	伍振志,傅志锋,王静,等.浅埋松软地层开挖中管棚注浆法的加固机理及效果分析[J].岩石力学与工程学报,2005,24(6):1025-1029.
[13]	郭衍敬,房倩,李兵.浅埋暗挖地铁车站管棚的数值模拟及其加固效果分析[J].北京工业大学学报,2010,36(1):40-45.
[14]	周顺华.软弱地层浅埋暗挖施工中管棚法的棚架原理[J].岩石力学与工程学报,2005,24(14):2565-2570.
[15]	董新平,周顺华,胡新朋.软弱地层管棚法施工中管棚作用空间分析[J].岩土工程学报,2006,28(7):841-846.