为使观测工作者对测压管孔内淤积情况的了解更为全面,现将我厂1987年扫孔工作中发现的一些现象作以介绍,以供参考。我们的扫孔工作达到了预期的目的。收到了较为满意的效果,几个比较典型的孔其扫孔成果见表1。经扫孔发现,孔内淤积除人们通常认为的一个淤积层外,还有一种有两个淤积层的淤积形式。在后种淤积形式下,观测过程中出现的假象较多。它是一个上有淤积,下有淤积,中间有水的特殊淤积 In order to enable observers to understand the situation of sedimentation in the piezometer tube hole more comprehensively, some phenomena found in the CT scanning work in our factory in 1987 are introduced for reference. Our hole cleaning work has achieved its intended purpose. Received a more satisfactory results, a few more typical hole hole results shown in Table 1. According to the scanning holes, there is a kind of silting which has two silting layers in addition to the silting layer usually thought as well. In the latter siltation, there are many illusions in the observation process. It is a siltation on the next siltation, in the middle of the special siltation of water