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本文以铜陵某建筑场地的采空区注浆治理工程为研究对象，针对注浆效果评价的技术难点，构建了微动、跨孔电磁波CT(Computed Tomography)、单孔剪切波波速测试相结合的综合物探方法注浆效果评价体系。通过对比注浆前、后各地球物理场参数的变化，揭示了注浆体在地下的空间分布规律。微动勘探法通过面波频散曲线反演，揭示了注浆前后视VS值由480～900 m/s提升至900～1 060 m/s的显著变化特征；跨孔电磁波CT的吸收系数由4～7.5 dB/m降至1～4.5 dB/m,直观呈现了注浆后吸收系数大大降低、围岩级别显著升高的特征；单孔波速测试则验证了注浆加固区横波速度值提升了160～200 m/s。结合钻探验证分析，物探解译的充填范围与岩芯取芯结果相吻合。结果表明，该综合评价体系通过多参数综合分析，实现了注浆体空间形态及力学性能的协同评价，为建筑场地稳定性评估和后续工程建设提供了可靠的依据。该注浆效果评价体系已在铜陵市多处重大建设工程中成功应用，保障了近15万㎡建筑群的安全施工，对相似地质背景条件下的城市地下空间开发具有重要的参考价值。
Abstract：This study focuses on the grouting effect evaluation of goaf treatment in a construction site in Tongling, China. To address technical challenges in grouting quality assessment, an integrated geophysical evaluation system was established by combining microtremor survey, cross-hole electromagnetic wave CT(computed tomography), and single-hole shear wave velocity testing.By comparing changes in geophysical parameters before and after grouting, the study reveals the spatial distribution of the grout. The microtremor method shows the VS increased from 480～900 m/s to 900～1 060 m/s. Cross-hole electromagnetic wave CT indicates the absorption coefficient dropped from 4～7.5 dB/m to 1～4.5 dB/m. The single-hole wave velocity test confirms a 160～200 m/s increase in transverse wave speed in the grouted area. Drill-core analysis shows high consistency with the geophysical interpretation of the grout's spatial distribution. In conclusion, this study has established a comprehensive evaluation system for grouting effects. Through multi-parameter analysis, it assesses both the spatial form and mechanical properties of the grout. This provides a solid basis for site stability assessment and future construction. Successfully applied in major projects in Tongling, the system has ensured the safe construction of nearly 150 000 square meters of buildings. It also offers significant reference value for urban underground space development in similar geological conditions.
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基本信息:
DOI：
中图分类号:P631
引用信息:
[1]朱紫祥,胡俊杰,彭青阳等.综合物探方法在建筑场地采空区注浆效果评价中的应用[J].工程地球物理学报,2025,22(04):520-528.
基金信息:
国家自然科学基金(编号:42072276)