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| 宜万铁路齐岳山隧道629高压充水溶腔处理技术 | |
| 引用本文： | 骆文学. 宜万铁路齐岳山隧道629高压充水溶腔处理技术[J]. 现代隧道技术, 2011, 48(4): 116-121 |
| 作者姓名： | 骆文学 |
| 作者单位： | 中铁十二局集团第二工程有限分司,太原,030032 |
| 摘 要： | 在齐岳山隧道正洞DK363+629掌子面进行超前水平钻探时,揭示出前方存在一个大型腔体,随后实施超前探测,初步判断了腔体形状,对腔体进行了处理。首先对溶腔进行注浆试验,总计注浆1 613 m3,注浆效果不明显,掌子面停止注浆试验;注浆试验失败后,对DK363+629溶腔进行放水试验,放水量为3 000 m3/h,持续放水共计144 h,水量约43万m3,水压持续在0.2 MPa左右,由于受到外界降雨的影响水压持续上扬,证明腔体具有良好的地表联通性和水量补给持续性,为了保证施工安全停止了放水试验。平导贯通后可采用自然流出法排水,并对腔体采取"释能降压"施工。本次泄水总量约63万m3,水压自0.4 MPa降至0.0 MPa,水量稳定在约1 000 m3/h;随后对腔体实施爆破施工,爆破后采用管道引排的方法在不改变原有水流方向和不影响整体地下水系的情况下顺利通过。 |
| 关 键 词： | 铁路隧道 高压充水溶腔 释能降压 放水试验 超前地质预报 |
Techniques for Treating a High-pressure Water-filled Cavity in Qiyueshan Tunnel on Yichang-Wanzhou Railway |
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| Luo Wenxue. Techniques for Treating a High-pressure Water-filled Cavity in Qiyueshan Tunnel on Yichang-Wanzhou Railway[J]. Modern Tunnelling Technology, 2011, 48(4): 116-121 | |
| Authors: | Luo Wenxue |
| Affiliation: | Luo Wenxue(2nd Engineering Company,China Railway 12th Engineering Bureau Group,Taiyuan 030032) |
| Abstract: | A large cavity in karst was detected during exploratory horizontal drilling ahead of the face in the Qiyueshan tunnel at DK363+629.Exploratory borings were used to determine the shape of the cavity.An injection test was carried out for the karst cavity with a total injection volume of 1613m3,but the test was unsuccessful.A water discharge test was then conducted for the karst cavity with a water release volume of 3000 m3/h continuously for 144h.The water volume was estimated at 430 thousand cubic meters and... |
| Keywords: | High-pressure water-filled karst cavity Energy release and pressure reduction Water discharge test geological forecasting Railway tunnel |
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