超微型贯入仪的研制及其应用

为了解和掌握非饱和土中团聚体的分布和强度，自行研制了一台SMP-1型超微型贯入仪。首先介绍了该仪器的工作原理和组成，并以面团和石灰改性膨胀土为贯入试样，对该仪器测试结果的有效性和正确性进行了验证。测试结果表明，该仪器可以获得贯入探针刺入端阻力与刺入深度间的关系曲线，以及团聚体在三维空间上任一纵、横剖面内的强度分布等值线图，可显示出试样内部丰富的结构性和不均匀性信息。该超微型贯入仪的研制成功为研究工程土体中团聚体分布及其内部结构和强度提供了一个新的手段。

Development of the super mini-penetrometer and its application

A SMP-1 super mini-penetrometer was made for the interest of knowing the distribution and strength of aggregates in unsaturated soils well. The work principle and buildup of this apparatus is briefly introduced; and then the feasibility and availability of the application of the apparatus are demonstrated through the penetration tests with the samples of dough and expansive soils treated by lime. It is shown from the test results that the curve of the resistance force to the end of the needle versus depth during penetration can be presented and the strength distribution isoline maps of aggregates in any vertical section or horizontal plane of the defined cube-like blocks of the samples, which can show the intra-structural diversity and nonuniformity of samples, are obtained with the application of the apparatus. The successful manufacture of the apparatus, therefore, provides a new method for studying the distribution, inner structure and strength of aggregates in engineering soils.