118
DO1;10.7672/sgjs2016170118
施工技术
CONSTRUCTION TECHNOLOGY
2016年9月上第45卷第17期
三明南铁路隧道下穿高速公路施工关键技术及
道路安全防控措施
胡守云1,2
(1.中铁十六局集团有限公司，北京100018；2.中国地质大学（武汉）工程学院，潮北武汉
430074）
【摘要】以三明南铁路隧道下穿既有高速公路工程为背景，考惠穿越工程区域工程地质及环境条件，提出了三明南铁路隧道下穿既有高速公路的关键施工技术，即在隧道穿越施工前，采取水平及垂直旋喷桩、超前大管棚、挡土墙锚杆等加固地层技术措施；隧道穿越时洞身采用双侧壁导坑法无爆破开挖施工，有效地控制公路路面变形；同时，提出了铁路隧道下穿施工时高速公路的安全防控措施。经现场对高速公路路面沉降进行监测，路面实际沉降值小
于设计要求的20mm，采取了“正常保通"措施，顺利穿越此段区域。【关键调】隧道工程；高速公路；施工技术；安全防控
【中图分类号】U414
［文献标识码］A
【文章编号】1002-8498(2016)17-0118-06
The Key Construction Technology and Road Safety Prevention and
ControlMeasuresforSanmingSouthRailway
TunnelUnderneathPassingExpressway
Hu Shouyun'.2
(1. China Railway 16th Group Co., Lad., Bejing100018, China; 2.Faculty of Engineering
China Unitersity of Geosciences, Wuhan, Hubei 430074, China)
Abstract: According to the engineering of Sanming South Railway Tunnel underneath passing expressway and under the consideration of the project area's engineering geological and environmental conditions, key construction technology for Sanming South Railway Tunnel underneath passing expressway is promoted. Namely, before tunnel construction, vertical and horizontal jet grouting pile, advanced large pipe, retaining wall, rock bolt and other earth reinforcement technical measures should be used; during the time of tunnel underneath passing expressway, double-side-drift method and no-blasting excavation construction should be used, it can control road surface deformation efficiently; at the same time,road safety prevention and control measures for railway tunnel undemeath passing expressway are proposed. Through the field monitoring of highway road surface settlement, the actual settlement value of the expressway pavement is less than 20mm, the'keep smooth in normal state'measure is taken, the tunnel can pass through the area successfully.
Key words:tunnels; expressway; construction; safety measures
本文以三明南铁路隧道下穿既有高速公路工程为背景，考虑穿越工程区域工程地质及地表特征，分析三明南铁路隧道下穿既有高速公路的关键施工技术和高速公路的安全防控技术，并分析三明南铁路隧道下穿既有高速公路过程中的公路沉降
【作者简介】胡守云，高级工程师，博士研究生，E-msil：hushouyun@ 163.con
【收稿日期】2016-07-12 万方数据
监测结果，为铁路隧道施工安全及既有高速公路行车安全提供依据。
工程概况 1
三明南铁路隧道位于三明市三元区，隧道起论里程为DK86+566—DK86+969，全长403m，由2 段斜切式洞门、2段明洞及1段暗润组成。横断面设计为双线隧道，隧道净宽12.76m，开挖宽度 14.02m。隧道左、右线间距为5.0m，纵坡设计为