二维微动探测技术在广州地铁十八号线番南区间的应用研究

On the Application of the 2-D Fretting Detection Technology to the Fannan Section of the Guangzhou Metro

介绍了小台阵二维微动剖面探测技术在广州地铁18号线番南1号盾构井PN1~番南2号盾构井PN2区间的应用状况。在区间内不能实施钻探的地方开展微动探测工作,探明了地面以下40 m范围内的土岩界面起伏、岩性变化及软弱岩体,为盾构施工提供可靠的物探依据。

Introduced in the present paper is the application of the small-array 2-D fretting cross-section detection technology to the Fannan Section of Line 18 of the Guangzhou Metro between the 1st shield shaft PN1 and the 2nd shield shaft PN2.The fretting detection construction is carried out in sections where the probing construction cannot be performed,as a result of which the ups and downs of the soil-rock interface,the change in the lithology,and weak rock bodies within 40 meters below the ground surface are explored,which provide reliable grounds of geophysical prospecting for the shield construction of the project.