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论文以某大型泥水盾构隧道为工程背景,将探地雷达应用于复杂地形地貌、地下管网及盾构施工扰动影响引起土体变异等的现场探测。探讨地质雷达方法在盾构隧道中适用性,研究同步注浆对周围土体的渗透范围以及对土质变异的影响。结果表明:(1)根据各个扫描断面的位置以及反射异常出现的埋深位置,可以比较精确地判断结构的不均匀分布区或者异常区;(2)依据雷达反射图像的清晰程度、信噪比强弱可以有效地判别地下管道与周围土体间存的衬砌结构、注浆影响区、后部土层等三个区域。结果可供同类工程借鉴。
In this paper, a large mud shield tunnel is taken as the engineering background, the ground penetrating radar is applied to the complex topography, the underground pipeline network and the disturbance of the shield construction cause the on-the-spot detection of the soil variation. This paper discusses the applicability of the GPR method in shield tunneling, and studies the influence of synchronous grouting on the seepage of surrounding soil and the variation of soil quality. The results show that: (1) According to the position of each scanning section and the buried depth of reflection anomalies, it is possible to judge the uneven distribution or the anomaly of the structure more accurately; (2) According to the clarity of the radar reflection image, Strong or weak can effectively distinguish between the underground pipe and the surrounding soil lining structure, grouting influence area, the soil behind the three regions. Results for similar projects for reference.