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本世纪五十年代,国外开始了抗拉特性方面的试验研究工作。当时只是用间接的方法来测量抗拉强度。如土梁弯曲试验等等。直接拉伸仪用于压实土始于六十年代。一九六四年希西盖瓦和伊凯尤蒂首次研制了无侧限单轴拉伸仪。我国七十年代开始对压实土的抗拉试验进行了研究。但多以防止土石坝防渗体(如心墙等)产生的张拉裂缝为目的。如一九七一年清华大学研制了单轴拉伸仪。该仪器是水平式的。用测微表量测变形。七十年代中期以后,武汉水利电力学院和北京水利水电科学研究院相继研制了轴向拉伸仪。在此基础上,结合我所现有的设备,我
In the 1950s, foreign countries started experimental research on tensile properties. At that time, only the indirect method was used to measure the tensile strength. Such as soil bending test and so on. The direct stretcher used to compact soil began in the 1960s. In 1964, Hesi Geva and Ike Utti first developed an unconfined uniaxial stretching apparatus. In the 1970s, China began to study the tensile test of compacted soil. However, most of them are aimed at preventing tensile cracks generated in the impervious bodies of earth-rock dams (such as the heart wall). For example, in 1971, Tsinghua University developed a uniaxial tensile tester. The instrument is horizontal. Deformation was measured with a micrometer. After the mid-1970s, the Wuhan Institute of Water Conservancy and Electric Power and the Beijing Institute of Water Resources and Hydropower Research have successively developed an axial tension meter. Based on this, combined with my existing equipment, I