摘要
高速铁路隧道穿越距离较长,受地质条件影响其施工难度和风险均较高,为了提升高速铁路隧道施工质量,研究复杂地质条件下高速铁路隧道高质量施工技术.以九万大山一号隧道作为研究对象,将边仰坡施工作为重点,经过土石方开挖、地表注浆、预加固桩和锚杆框架梁施工工序,以实现边仰坡施工的目标.在此过程中,通过计算高速铁路隧道围岩抗压强度和垂直于隧道围岩最大初始地应力比值,判断高速铁路隧道围岩变形,计算围岩变形区域变形压力后,依据变形压力对高速铁路隧道围岩进行支护,保障高速铁路隧道施工质量.实验表明,该技术应用后,高速铁路隧道的锚杆密实度均超过80%,锚孔间距偏差较小,桩基承载力也较为均匀,高速铁路隧道施工质量较高.
High-speed railway tunnels often span long distances and are difficult and risky to construct due to complex geological conditions.This study investigates high-quality construction technologies for such tunnels to enhance their construction quality under complex geological conditions.Taking the No.1 Tunnel of Jiuwandashan as the research subject,this study emphasizes the construction of the side and top slopes.The construction process includes earthwork excavation,surface grouting,pre-reinforcement piles and anchor rod frame beams to achieve the slope construction objectives.During this process,deformation of the surrounding rock in the high-speed railway tunnel is assessed by calculating its compressive strength and the ratio of maximum initial ground stress perpendicular to the tunnel periphery.Having computed the deformation pressure within the deformation zone of the surrounding rock,support measures for the tunnel's surrounding rock are designed based on this pressure to ensure construction quality.Experimental results show that,following the implementation of this technology,the anchor rod compactness in the high-speed railway tunnel exceeds 80%,the anchor hole spacing deviation is minimal,the pile foundation bearing capacity is relatively uniform and the tunnel's overall construction quality is high.
作者
姬志鸿
崔银珂
JI Zhihong;CUI Yinke(China Railway 18th Bureau Group Third Engineering Co.,Ltd.,Zhuozhou 072750,China;China Railway Zhengzhou Group Co.,Ltd.,Zhengzhou 450000,China)
出处
《徐州工程学院学报(自然科学版)》
2026年第1期22-30,共9页
Journal of Xuzhou Institute of Technology(Natural Sciences Edition)
关键词
铁路隧道
施工技术
边仰坡
锚杆框架梁
railway tunnel
construction technology
side and top slopes
anchor rod frame beam
