挤压性围岩大跨隧道双支洞挑顶技术研究
|
摘要
兰渝铁路新城子隧道受高地应力软岩影响,为典型的挤压性大变形隧道。本文以新城子隧道为工程背景,为确保安全快速的贯通大跨段,展开了对挤压性围岩大跨隧道的挑顶技术研究。通过对新城子隧道工程特点、地质特点和变形特点的综合分析,研究确定了双支洞挑顶技术,即:上支洞爬坡挑顶进入正洞上台阶,下支洞平坡进入正洞下台阶。最后从监测数据分析和经济分析上验证了方案的可行性,确保了新城子隧道的顺利贯通。
Affected by the high crustal stress and soft rock,the new sub railway tunnel between Lanzhou and Chongqing is a typical large deformation tunnel. This paper was based on the new sub railway and carried out researches on the roof ripping technology of the long-span tunnel double branch hole of extruded surrounding rock in order to ensure the safety and quickness of perforating long span. Based on the comprehensive analysis of engineering,geological and deformation characteristics of the new sub railway,the research determined the roof ripping technology of double branch hole,which was that the climbing roof ripping of upper branch hole got into the upper step,and the climbing roof ripping of down branch hole got into the down step. At last,through the analysis of monitoring data and economy,the feasibility of the plan was verified and the transfixion of the new sub railway was ensured.
Affected by the high crustal stress and soft rock,the new sub railway tunnel between Lanzhou and Chongqing is a typical large deformation tunnel. This paper was based on the new sub railway and carried out researches on the roof ripping technology of the long-span tunnel double branch hole of extruded surrounding rock in order to ensure the safety and quickness of perforating long span. Based on the comprehensive analysis of engineering,geological and deformation characteristics of the new sub railway,the research determined the roof ripping technology of double branch hole,which was that the climbing roof ripping of upper branch hole got into the upper step,and the climbing roof ripping of down branch hole got into the down step. At last,through the analysis of monitoring data and economy,the feasibility of the plan was verified and the transfixion of the new sub railway was ensured.
引文
[1]王梦恕.中国隧道及地下工程修建技术[M].北京:人民交通出版社,2010:563-568.
[2]姜永振.铁路隧道软弱围岩地段斜井进主洞挑顶施工技术[J].辽宁省交通高等专科学校学报,2015,17(6):12-16.
[3]赵继华.棚架套拱挑顶法施工软弱浅埋隧道斜井进正洞技术[J].铁道建筑,2012(5):38-40.
[4]吴燕升.软弱围岩隧道斜井进正洞双曲拱式支护结构施工技术[J].铁道建筑技术,2016(3):38-41.
[5]王锋波.中条山隧道斜井转正洞施工技术[J].铁道建筑技术,2015(9):31-33,46.
[6]张玉良.云桂高铁革朗隧道2#横洞与正洞交叉段挑顶施工[J].山东工业技术,2016(17):100.
[7]房冉冉.隧道软弱围岩斜井进正洞挑顶施工技术的研究[J].石家庄铁路职业技术学院学报,2013(4):42-46.
[8]罗伟亮.高寒地区强风化地质条件下的隧道斜井挑顶施工技术[J].企业科技与发展,2014(9):79-81.
[9]赵生彬,辛军响.软弱围岩大断面隧道斜井进正洞挑顶施工技术[J].铁道标准设计,2011(S1):132-134.
[10]刘新英.弱胶结未成砂岩挑顶斜井与隧道初支结构转换技术[J].兰州交通大学学报,2014,33(1):39-43.
[11]沙强国.新黄土隧道横洞进正洞正交挑顶施工技术[J].铁道勘察,2011(3):86-88.
[12]邓启华,王友军,姚日高.富水隧道Ⅴ级围岩双车道斜井进正洞挑顶施工技术[J].铁道建筑技术,2014(3):95-98.
[2]姜永振.铁路隧道软弱围岩地段斜井进主洞挑顶施工技术[J].辽宁省交通高等专科学校学报,2015,17(6):12-16.
[3]赵继华.棚架套拱挑顶法施工软弱浅埋隧道斜井进正洞技术[J].铁道建筑,2012(5):38-40.
[4]吴燕升.软弱围岩隧道斜井进正洞双曲拱式支护结构施工技术[J].铁道建筑技术,2016(3):38-41.
[5]王锋波.中条山隧道斜井转正洞施工技术[J].铁道建筑技术,2015(9):31-33,46.
[6]张玉良.云桂高铁革朗隧道2#横洞与正洞交叉段挑顶施工[J].山东工业技术,2016(17):100.
[7]房冉冉.隧道软弱围岩斜井进正洞挑顶施工技术的研究[J].石家庄铁路职业技术学院学报,2013(4):42-46.
[8]罗伟亮.高寒地区强风化地质条件下的隧道斜井挑顶施工技术[J].企业科技与发展,2014(9):79-81.
[9]赵生彬,辛军响.软弱围岩大断面隧道斜井进正洞挑顶施工技术[J].铁道标准设计,2011(S1):132-134.
[10]刘新英.弱胶结未成砂岩挑顶斜井与隧道初支结构转换技术[J].兰州交通大学学报,2014,33(1):39-43.
[11]沙强国.新黄土隧道横洞进正洞正交挑顶施工技术[J].铁道勘察,2011(3):86-88.
[12]邓启华,王友军,姚日高.富水隧道Ⅴ级围岩双车道斜井进正洞挑顶施工技术[J].铁道建筑技术,2014(3):95-98.