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本文所介绍粘土心墙现场渗透试验的方法,较之国家规范SDS01—79介绍的双环法、简便易行。试验周期短、成果可靠、是一种现场鉴定粘土心墙碾压质量、抗渗性能的行之有效的方法。阿尔及利亚布库尔丹大坝用该种方法进行过现场渗透试验近50组,同时用南55型渗透仪进行过室内对比试验。现场试验给出的渗透系数比室内结果大2个量级。因此,将该方法获得的渗透系数用于设计计算偏于安全。
This article describes the method of on-site clay mortar penetration test, compared with the national standard SDS01-79 introduced double ring method, simple and easy. Short test period and reliable results are an effective method for on-site identification of the quality and impermeability of clay core wall rolling. Nearly 50 groups of site penetration tests were conducted in this way by the Bukoleanan Dam in Algeria, and indoor comparison experiments were carried out with the South 55 infiltration device. The field test shows that the permeability coefficient is two orders of magnitude larger than the indoor result. Therefore, the permeability coefficient obtained by this method is used in the calculation of design bias to safety.