摘要
为研究地下不良地质体的分布范围及埋深位置,采用高密度电法和地质雷达法相结合的综合探测法,对长株潭城际轨道交通西环线一期工程桐溪路站(巡捂路站)—大王山站盾构区间右线655环—657环上方地质体进行探测,得出如下结论,高密度电法在场地有限的范围内,在保证探测精度的前提下,探测深度局限较大,且很难确定不良地质体的分布范围;地质雷达法现场操作较为灵活,在保证探测深度的前提下,能探测不良地质体的的分布范围,对具体深度位置难以确定;两者相结合,用高密度电法确定不良地质体的深度位置,推导应用到地质雷达里面,确定地层的综合介电常数,确定探测区域内不良地质体的分布范围及埋深位置;探测分析结果经钻心取样验证,与现场实际相吻合。
In order to study the distribution range and buried depth of ubsurface undesirable geological bodies, a comprehensive detection method combining high-density electrical method and geo-radar method was adopted,the geological body above ring 655 and ring 657 of the right line of the shield section of Tongxi Road Station(Xunpu Road Station) and Dawangshan Station in the first phase of the West Ring of Changsha-Zhuzhou-Xiangtan Intercity Rail Transit project was explored. The following conclusions are drawn:the high-density electrical method has a large detection depth limitation in the limited range of the site and on the premise of ensuring the detection accuracy. It is difficult to determine the distribution range of the undesirable geological bodies. The geological radar method is flexible in field operation, and can detect the distribution range of the undesirable geological body on the premise of ensuring the detection depth, but it is difficult to determine the specific depth location. By combining the two methods, the depth location of the undesirable geological body is determined by high-density electrical method, which is derived and applied to the geological radar, the comprehensive dielectric constant of the formation is determined, and the distribution range and burial depth of the undesirable geological body in the detection area is determined. The results of detection and analysis are verified by drilling core sampling and are in agreement with the actual situation.
出处
《科技创新与应用》
2022年第34期158-161,共4页
Technology Innovation and Application
关键词
高密度电法
地质雷达法
物探法
地下工程
不良地质体
high density electrical method
geological radar method
geophysical method
underground engineering
bad geological body
作者简介
龚俊(1988-),男,工程师,项目经理。研究方向为公路工程、市政工程隧道、桥梁监测及检测,地质探测研究。
