关于《公路桥涵地基与基础设计规范》液塑限试验方法的讨论

我国有多种液塑限试验方法分别在不同的规范中使用。各规范液塑限试验方法的不统一,给岩土勘察和工程设计带来很多不便。在提出液塑限试验方法优越性评价标准的基础上,利用已有资料,对各种液塑限试验方法的优越性进行了探讨。结合国内外现状,考虑与国际接轨的要求,对新修订的《公路桥涵地基与基础设计规范》提出了采用76 g锥入土深度17 mm的方法测量液限和入土深度2 mm的方法测量塑限的意见。

Discussion About Liquid-Plastic Limit Testing Method in Specification for Design of Ground Base and Foundation of Highway Bridges and Culverts

There are many liquid-plastic testing methods functioning in different specifications in China.But due to their inconsistence,a lot of inconveniences are made in the process of soil exploration and projects design.On the basis of evaluation standards of the superiority of liquid-plastic testing methods,the various kinds of testing methods and their advantages are discussed using the available materials.Considering both the domestic and the international situation,a suggestion is put forward for the newly revised Specification for Design of Ground Base and Foundation of Highway Bridges and Culverts,that a 76 g cone penetrates the soil 17 mm in depth to measure the liquid limit and 2 mm in depth to measure the plastic limit.