浅埋暗挖法在下穿高等级公路中的应用
浅埋暗挖法在下穿高等级公路中的应用
摘要：采用浅埋暗挖法在即有高等级公路下修建过水隧道，是解决道路交通的一个创新。通过采用超前小导管预注浆、型钢钢架支护等措施，极大的发挥了不拆迁、不扰民、不影响交通、不破坏环境等优点，工程工期与造价都有明显的缩短，为保质保量完成奠定了良好的基础。
关键词：浅埋暗挖法；高等级公路；应用；效益
abstract: shallow buried-tunnelling method is employed in building water tunnel under the built high-grade highways, which is innovation of traffic. small pipe pregrouting,
reinforced steel supporting frame make great contribution to no demolition, no disturbing, no impact on traffic, and no destruction on environment, which has greatly shortened the construction period and reduced the cost, laying a favorable foundation for completion.
key words: shallow buried-tunnelling method; high-grade highway; application; benefit
中图分类号： x734 文献标识码：a 文章编号：2095-2104（2012）
一、工程概况
1、工程概述
南水北调中线一期工程天津干线，在河北省雄县白玛村南下穿越津保公路。津保公路为双向2车道，涵址处路基全宽12.0m 。路基