论文部分内容阅读
软基工程地质勘探钻孔除要求采取原状土样及扰动土样外,还必须测定初见水位,即土层天然干湿分界面。其深度从几米到十几米不等,是研究浅层地下水活动及其对工程地质影响的重要依据。本文讨论如何从钻进方法和钻探工艺上,保证土层天然干湿分界面测定的准确性。为了保证取得干湿分界面的准确位置,从开孔到分界面不得使用任何冲洗液钻进,
Soft foundation engineering geological exploration drilling in addition to the need to take undisturbed soil samples and disturbed soil samples, but also to determine the initial water level, that is, natural wet and dry soil interface. Its depth varies from a few meters to more than ten meters, which is an important basis for studying shallow groundwater activities and their impact on engineering geology. This article discusses how to ensure the accuracy of the determination of the natural wet / dry interface at the drilling method and drilling process. In order to ensure the exact location of wet-dry interface, from the opening to the interface shall not use any flushing liquid drilling,