摘要
在软弱围岩隧道施工中,由于围岩软弱松散、破碎、整体性差,开挖过程中围岩受扰动易出现失稳坍塌等安全事故,稍有不慎就会给施工带来困难,延误工期,甚至会造成严重的安全事故,故对掌子面前方的围岩进行预报和探测显得尤为重要。准确的地质预报和岩性分析不仅可以弥补设计勘测中的不足,而且可以为进一步的施工处理提供必要的信息,及时调整衬砌参数,避免安全事故和成本损失。以武都西隧道为依托工程,采用地质雷达法和岩性分析等组成综合超前地质预报系统,对掌子面前方的富水、围岩岩性以及稳定性进行了综合分析和预判,为及时制订和处理预案提供了可靠的科学依据。
During the construction of soft rock tunnel, because of the rock is soft, loose and easily broken, the integrality of rock is poor. If the wall rock is disturbed during excavation, collapse may easily occur. If it is not carefully concerned, construction duration will be delayed even serious safety accidents may happen. So the forecast and exploring to the wall rock in front of the face is especially important. Precise geologic forecast and rock property analyzing will not only remedy the deficiency of design, but also provide necessary information to further construction treatment in order to adjust lining parameters timely and avoid safety accidents and cost lose. Based on the Chengdu west tunnel, in this article the water content, wall rock property and stability of the rock in front of the face are analyzed and forecasted by the ahead geological forecasting system consisting of geologic radar method and rock properties analysis, which can provide reliable scientific basis to prepare emergency plan and take treatment measures.
出处
《公路》
北大核心
2014年第9期193-196,共4页
Highway
关键词
软岩隧道
地质预报
岩性分析
地质雷达
soft rock tunnel
geologic forecast
rock properties analyzing
geologic radar
