隧道内桩基成孔施工组织及费用研究  

Study on Construction Organization and Cost of Pile Foundation Hole Formaton in Tunnel

作　　者：钱昊 QIAN Hao(China Railway Second Institute Engineering Engineering Group Co.,LTD.,Chengdu 610031,China)

机构地区：[1]中铁二院工程工程集团有限责任公司,成都610031

出　　处：《铁路工程技术与经济》2024年第3期47-51,70,共6页Railway Engineering Technology and Economy

摘　　要：岩溶隧道施工中,经常需要采用桩筏结构对隧底岩溶进行处理,受隧道洞内净空限制,同时考虑到冲击钻对结构安全的影响,只能采用旋挖钻对隧道洞内桩筏基础进行施工,现行铁路定额中缺乏旋挖钻钻石的相关定额,以贵南高铁为依托,采用写实记录法测定了隧道洞内旋挖钻成孔的工料机消耗,并对其进行了单价分析。In the construction of karst tunnels,Pile-raft structures are often used to treat tunnel bottom karst,Considering the limitation of tunnel clearance and the influence of percussion drilling on structural safety,only rotary drilling can be used to construct the pile-raft foundation in the tunnel hole.However,there is a lack of relevant quotas for rotary drilling diamonds in the current railway quotas。Relying on the Guinan high-speed railway,we measured the consumption of labor,material and machine for rotary drilling and drlling in the tunnel by realistic recording method,and the unit price analysis was carried out.

关 键 词：岩溶隧道 旋挖钻 定额测定 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]