岩裂隙发育、地下空洞等是岩溶场地普遍存在的不良地质条件，易带来地基沉降不均匀、承载力不足等工程隐患，注浆加固可视为改良岩溶地基整体性能的关键技术手段。本文采用瞬态瑞雷波探测技术展开对比观测试验从而对新型导电水泥基注浆材料实现现场加固质量的高校、无损及全域化评估，深层探测数据偏差依托频散曲线反演算法进行修正，将注浆前后岩土体瑞雷波速的空间分布特征与地层结构变化规律进行对比。结果表明：原状岩溶基0~4m为低波速覆盖层，且由东向西逐渐增厚，多处隐蔽溶洞在场地内发育；波速在采用导电水泥基材料进行加固处理后得到显著提升，大幅度改善了土体的整体性与密实度，可为岩溶地区地基加固检测提供技术参考。
Development of rock
fissures and underground cavities are common adverse geological conditions in
karst sites, which easily lead to uneven foundation settlement and insufficient
bearing capacity. Grouting reinforcement can be regarded as a key technical means
to improve the overall performance of karst foundations. This paper uses
transient Rayleigh wave detection technology for comparative observation and
testing to conduct high-scale, non-destructive, and global assessments of the
on-site reinforcement quality of new conductive cement-based grouting
materials. The deviation of deep detection data is corrected using the
dispersion curve inversion algorithm, and the spatial distribution
characteristics of Rayleigh wave velocity in rock and soil before and after
grouting are compared with the patterns of stratigraphic structure changes.
Results show that the undisturbed karst base at 0~4m is a low-velocity
overburden layer, thickening gradually from east to west, with multiple
concealed karst caves developing within the site; After reinforcement treatment
with conductive cement-based materials, wave velocity was significantly
improved, greatly enhancing soil integrity and compaction, providing technical
reference for foundation reinforcement testing in karst areas.
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