综合超前预报技术在复杂地质隧道中的应用-《高速铁路技术》

文章信息/Info

Title:: Application of Comprehensive Prediction Technology in Tunnels with Complex Geological Conditions

Author(s):: WANG Kai; MU Yuancun; LI Xing; China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: tunnel|comprehensive geological prediction|TSP|ground penetrating radar|drilling in advance|outwash accumulation body

摘要:: 综合超前地质预报技术能弥补单一预报方法的不足,有效提高预报精度,是复杂地质隧道施工中规避风险的重要手段。本文以拉林铁路某隧道为例,展示综合超前预报技术的实际应用效果。文章首先介绍了TSP、地质雷达、超前钻探等单一方法的预报情况,之后对各方法的预报成果进行对比分析和判识,进行综合超前地质预报,查明了冰水堆积层的分布位置与性质。隧道开挖结果表明,现场地质情况与综合分析结论吻合,综合超前地质预报技术能有效提高预报准确率,为施工方案的调整提供了依据,对指导现场施工,降低施工盲目性、保障施工安全起到了积极作用。

Abstract:: The comprehensive geological prediction technology can make up for the shortcomings of a single prediction method and effectively improve the prediction accuracy. It is an important means to avoid risks in complex geological tunnel construction. This paper takes a tunnel of the Lhasa-Nyingchi Railway as an example to show the practical application effect of comprehensive prediction technology. This paper firstly introduces the predictions of single methods such as TSP, ground penetrating radar, and exploration drilling in advance, and then compares, analyzes, and identifies the prediction results of each method, and carries out comprehensive geological prediction to identify the distribution location and nature of the outwash accumulation layer. The tunnel excavation results show that the on-site geological conditions match the conclusion of the comprehensive analysis, and the comprehensive geological prediction technology can effectively improve the prediction accuracy, provide a basis for the adjustment of the construction plan, and play a positive role in guiding the on-site construction, reducing construction blindness and ensuring construction safety.