一、前言在工程地质钻探中,取原状土样进行室内试验,仍是工程勘察中的主要手段,而采取原状土样的质量直接影响室内试验的精确性。当然,所谓原状不扰动土样实际上只是一个相对的概念,任何土样脱离土体之后总有一定程度的扰动,特别是软土试样,更易受到扰动。因此、在设计一个软土取土器时,不但要考虑密封性能,而且要结构合理。目前,国外的取土器一般趋向采用薄壁(软土取土器壁厚约为1.5毫米),结构比较合理,但较为复杂。结合我国目前的钻机形式及钻探方法,我们认为软土取土器首先 I. INTRODUCTION In engineering geology drilling, taking the undisturbed soil sample for indoor testing is still the main method in the engineering investigation. The quality of the undisturbed soil sample directly affects the accuracy of the indoor test. Of course, the so-called undisturbed soil sample is actually a relative concept. Any soil sample will always have a certain degree of disturbance after leaving the soil. In particular, the soft soil sample is more susceptible to disturbance. Therefore, when designing a soft earth earth borrower, not only the sealing performance but also the structure must be considered. At present, foreign earth pickers generally tend to use thin walls (wall thickness of soft earth borrowers is about 1.5 mm), the structure is relatively reasonable, but more complex. In combination with the current rig form and drilling method in China, we believe that the soft earth borrower first