현장투수시험 시 Clogging 발생을 최소화하기 위한 시험절차 개선방안

초록

This study examines the impact of clogging, resulting from soil disturbance and fine particle deposition during in-situ permeability tests, on the estimation of the coefficient of permeability. Field tests using the water level descent method were conducted using two approaches: the Uncased Method and the Cased Method, each applied with top water injection and the newly proposed bottom water injection method. The results show that bottom injection significantly reduced clogging effects and yielded higher permeability values, especially in the uncased method. Comparisons between water level descent and rise methods revealed that the descent method generally yielded higher permeability coefficients, although site-specific factors, such as soil type and anisotropy, influenced the results. This study provides insights into the impact of test methods on permeability measurement and suggests methodological improvements for reliable in-situ testing procedures.

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