隧道建设
隧道建設
수도건설
TUNNEL CONSTRUCTION
2014年
z1期
247-255
,共9页
新蜀河隧道%软岩大变形%软弱围岩%监控量测
新蜀河隧道%軟巖大變形%軟弱圍巖%鑑控量測
신촉하수도%연암대변형%연약위암%감공량측
New Shuhe tunnel%soft rock%serious deformation%“top heading +two benches”method%“top heading +temporary invert”method%“Bench I +temporary invert”method%monitoring
为了解决隧道开挖后初期支护侵限引起多次拆换的施工难题，在总结已有软弱围岩开挖技术、支护原理、新奥法隧道支护理论和软弱隧道支护技术的基础上，结合新蜀河隧道监控量测资料，对隧道的施工方法、施工工艺、支护参数、施工中采取的主要措施和取得的施工效果等方面做了大量研究。施工中分别对三台阶法、上台阶加设临时仰拱法和中台阶加设临时仰拱法3种工法工况进行了数值模拟计算和工法试验验证，中台阶加设临时仰拱法效果最好，采用此工法后基本控制了初期支护拆换的问题，节约了施工成本，提高了工效，施工风险也大大降低。
為瞭解決隧道開挖後初期支護侵限引起多次拆換的施工難題，在總結已有軟弱圍巖開挖技術、支護原理、新奧法隧道支護理論和軟弱隧道支護技術的基礎上，結閤新蜀河隧道鑑控量測資料，對隧道的施工方法、施工工藝、支護參數、施工中採取的主要措施和取得的施工效果等方麵做瞭大量研究。施工中分彆對三檯階法、上檯階加設臨時仰拱法和中檯階加設臨時仰拱法3種工法工況進行瞭數值模擬計算和工法試驗驗證，中檯階加設臨時仰拱法效果最好，採用此工法後基本控製瞭初期支護拆換的問題，節約瞭施工成本，提高瞭工效，施工風險也大大降低。
위료해결수도개알후초기지호침한인기다차탁환적시공난제，재총결이유연약위암개알기술、지호원리、신오법수도지호이론화연약수도지호기술적기출상，결합신촉하수도감공량측자료，대수도적시공방법、시공공예、지호삼수、시공중채취적주요조시화취득적시공효과등방면주료대량연구。시공중분별대삼태계법、상태계가설림시앙공법화중태계가설림시앙공법3충공법공황진행료수치모의계산화공법시험험증，중태계가설림시앙공법효과최호，채용차공법후기본공제료초기지호탁환적문제，절약료시공성본，제고료공효，시공풍험야대대강저。
During the construction of New Shuhe tunnel on the second Xiangfan-Chongqing railway,serious deformation occurs after tunnel excavation,which results in the interference of the primary support.In the paper,the construction technologies for tunnels located in soft rock mass with serious deformation potentials are summarized,and case study is made on the construction of New Shuhe tunnel,by means of numerical simulation and construction verification,in terms of“top heading +two benches”method,“top heading +temporary invert”method and “Bench I +temporary in-vert”method.The study shows that the “Bench I +temporary invert”method is the best solution for the tunnel.“Bench I +temporary invert”method has been adopted for the tunnel,the serious deformation of the tunnel has been brought under control,the construction cost has been reduced,the construction efficiency has been improved and the construction risks have been minimized.
