北京新机场北线工程新近沉积土鉴别研究

Study on Identification of Newly Sedimentary Soil in North Line Project of New Beijing Airport

在地质勘察中,钻孔内取土后,野外初步鉴别新近沉积土,但当土层特征不明显的情况下,很难确认是否为新近沉积土层。可依据土的压缩模量和标准贯入试验值,建立的判别公式进行辅助判别。文章结合新机场北线高速公路工程实例,利用上述判别公式,对该工程拟建场地内新近沉积土进行了判定,采用该法可以更准确的鉴别新近沉积土。

In geological survey, after drilling the soil, the field initially identified the newly deposited soil, but when the characteristics of the soil layer is not obvious, it is difficult to confirm whether it is a newly deposited soil layer. Based on the compression modulus of soil and the standard penetration test value, the established discriminant formula can be used to assist the discriminant. Based on the example of the highway project on the North line of the new airport, this paper makes a judgment on the newly deposited soil in the proposed site of the project by using the above discrimination formula.