人民长江
人民長江
인민장강
YANGTZE RIVER
2015年
12期
48-52
,共5页
高地应力%硬岩%变形控制%注浆加固%深埋隧道
高地應力%硬巖%變形控製%註漿加固%深埋隧道
고지응력%경암%변형공제%주장가고%심매수도
high in-situ stress%hard rock%large deformation%deformation control%grouting reinforcement%deep buried tun-nel
高地应力下隧道的围岩变形是岩体力学的关键问题之一，甘肃关山隧道埋深较大，在穿越高地应力区域时极易出现围岩失稳、塌方及支护结构大变形等现象。选取隧道典型试验段，通过数值计算及数据监测，对其大变形规律和防控技术进行了研究，进而得到了隧道围岩的变形和应力分布规律。根据分析结果，建议隧道衬砌施工时采用柔性支护的理念进行设计，优化边墙曲率，加大预留变形量，采取径向注浆加固及降低扰动。实践表明，一系列防控措施有效控制了围岩变形，降低了隧道施工风险，可为以后类似工程的设计和施工提供实践借鉴。
高地應力下隧道的圍巖變形是巖體力學的關鍵問題之一，甘肅關山隧道埋深較大，在穿越高地應力區域時極易齣現圍巖失穩、塌方及支護結構大變形等現象。選取隧道典型試驗段，通過數值計算及數據鑑測，對其大變形規律和防控技術進行瞭研究，進而得到瞭隧道圍巖的變形和應力分佈規律。根據分析結果，建議隧道襯砌施工時採用柔性支護的理唸進行設計，優化邊牆麯率，加大預留變形量，採取徑嚮註漿加固及降低擾動。實踐錶明，一繫列防控措施有效控製瞭圍巖變形，降低瞭隧道施工風險，可為以後類似工程的設計和施工提供實踐藉鑒。
고지응력하수도적위암변형시암체역학적관건문제지일，감숙관산수도매심교대，재천월고지응력구역시겁역출현위암실은、탑방급지호결구대변형등현상。선취수도전형시험단，통과수치계산급수거감측，대기대변형규률화방공기술진행료연구，진이득도료수도위암적변형화응력분포규률。근거분석결과，건의수도츤체시공시채용유성지호적이념진행설계，우화변장곡솔，가대예류변형량，채취경향주장가고급강저우동。실천표명，일계렬방공조시유효공제료위암변형，강저료수도시공풍험，가위이후유사공정적설계화시공제공실천차감。
Deformation of tunnel surrounding rock under high in-situ stress is one of the key problems of deep rock mechan-ics. The buried depth of Guanshan tunnel is large, so the instability of surrounding rock, landslides and large deformation of re-taining structure would easily occur when it passes through high ground stress area. A typical test section of Guanshan tunnel was selected, then the large deformation law and control technology were studied through data monitoring and numerical calculation, and the deformation and stress distribution laws of the surrounding rock of the tunnel were obtained. Based on the analysis re-sults, a series of prevention and control measures were suggested, such as tunnel lining with the concept of flexible supporting de-sign, optimizing wall curvature, increasing reserve deformation, radial grouting reinforcement and reducing disturbance. The en-gineering practices indicate that these comprehensive prevention and control measures can effectively control the deformation of surrounding rock, reduce the risk of tunnel construction.
