目前国产及一些进口三轴仪都存在着体变量测精度不高的问题。主要原因是常规体变量测管的分辨值差和压力室本身膨胀较大,影响了土体外体变的量测。本文介绍了一种全玻璃注射器体变管,它是由常规体变管改进而得。文章给出了它的技术指标、并描述了工作原理及构造。 At present, some domestic and some imported triaxial devices exist the problem of low accuracy of volumetric measurement. The main reason is that the difference between the resolution value of the conventional variable volume tube and the expansion of the pressure chamber itself has a great impact on the measurement of body deformation outside the soil. This article describes a all-glass syringe body change tube, which is modified by a conventional body modification tube. The article gives its technical specifications, and describes the working principle and structure.