一、前言对不了解的地层进行土质调查,一般是首先进行伴随标准贯入试验的钻探,这样做是因为它有很大的优点。它可以采取土样标本以确定土层的强度(以N值表示)同时确定土层的土质组成。但是这种标准贯入试验钻探,特别是在迅速性经济性方面都劣于其他的触探(主要 I. INTRODUCTION For soil surveys of unacquainted formations, it is common practice to drill with the standard penetration test first, because it has great advantages. It can take samples of soil samples to determine the strength of the soil layer (indicated by N value) and determine the soil composition of the soil layer. But this standard penetration test drilling, especially in terms of rapid economic performance, is inferior to other touch probes (mainly