摘要
八片山隧道地形复杂、地质情况不明确,有可能出现未探测到的断层和破碎带等不良地质结构,不利于隧道施工安全。采用“角度+位置偏移”联合系统及多源多接收联合叠加方法改良USP21地质预测系统,对掌子面前方60 m范围内的围岩完整情况和裂隙发育状况进行预测。经过大量的现场测试和验证,改良后的USP21地质预测系统预测精度可达到85%,显著提高了长大隧道地质预报的准确性和精度,并且能为隧道施工提供具体的灾害体形态和准确的空间位置,保证了隧道安全施工。
The terrain of the Bapianshan Tunnel is complex and the geological conditions are not clear. There may be exist undetected faults such as fracture zones and other adverse geological structures, which are not conducive to the safety of tunnel construction. In this paper, the combined system of "angle+position skewing" and the combined stacking method of multisource and multi receiver are used to improve the USP21 geological prediction system to predict the integrity of surrounding rock and the development of fractures within 60 m in front of the tunnel face. After a large number of field tests and verifications, the prediction accuracy of the improved USP21 geological prediction system can reach 85%, which significantly improves the accuracy and precision of geological prediction for long and large tunnels, and can provide the shape of specific disaster body and accurate spatial location for tunnel construction, ensuring the safe construction of tunnels.
作者
赵莉蒙
ZHAO Limeng(China Railway 18th Bureau Group 1st Engineering Co.,Ltd.,Tianjin 300000,China)
出处
《国防交通工程与技术》
2023年第1期77-80,共4页
Traffic Engineering and Technology for National Defence
关键词
长大隧道
USP地质预报技术
超前预报
long and large tunnel
USP geological prediction technology
advance forecast
