摘要
隐蔽人防通道的治理和监测是许多老城区改造中很难避开的难题,为了对某城区的地下工程进行全面探查,在已知人防通道上方进行了高密度电法、微动探测试验,通过试验证实,①高密度电法在浅地表探测时具有较高的分辨率,但实际使用时,高密度电法一般对低阻异常识别能力较强,在城市复杂地区,由于地表硬化,自然电位高等影响,效果可能会受到影响.②对城市复杂地表条件,用分布式高密度电法仪可以有效解决测线长度不同带来的数据采集问题.③微动方法对地表环境要求较低,对浅部地层具有较高的分辨率.通过实践证实,由于城市地表环境复杂,采用高密度电法与微动相结合的综合地球物理方法,可以对地下工程进行空间位置和充、积水特征识别,为开展类似地下工程探测提供了参考.
Abstract
The mitigation and monitoring of the hidden underground civil defense tunnels are difficult to avoid in many of the old city re-construction projects.To conduct a comprehensive exploration of these underground civil defense facilities by using ERT method,Microtremor survey are performed.The ERT for the underground tunnel of water filling levels and locating have high-er reliability.The microtremor survey locating of the underground tunnel results in a better accuracy.Throughout the practice,it is confirmed that,using ERT combined with the micro integrated geophysical methods can achieve a better result in detecting the characterization of the abandoned underground civil defense tunnels and provides a reference for the similar projects.
基金项目
宁夏回族自治区重点研发计划项目(2021BEG03027)
维普
万方数据