2021年6月7日晚上8点，北京冬奥支线隧道某段在开挖过程中发生突水事故，涌水量达到300立方米/小时。事件发生后，应用超深探测大功率地质雷达对指定里程段进行超深探测，在掌子面附近发现一个富水区，深度为17.2-23.0米、水平长度12.5米，同时在距掌子面前方40米处预测到另一富水区域，深度16.5-22.1米、水平长度10米。事后在隧道内开展了探地雷达探测，并在掌子面涌水口附近有涌出的木桩、碎煤块等杂物，经走访周边和查阅相关资料，初步判断事故路段为早期废弃的小煤窑的巷洞，经过长时间地表水渗漏，巷洞内充积满了水，其可能是本次掌子面突发涌水的主要原因。
北京住总集团针对“城市生命线工程”——地铁隧道规划勘察、隧道建设及运营等不同时期的工程地质隐患，开展地铁隧道基坑超深超前智能探测、地铁隧道安全隐患综合探测、盾构管片外侧注浆体不均匀探测，搭建地铁隧道安全隐患智能诊断及预警平台，为地铁隧道施工和运营安全提供技术支撑。
地铁隧道安全隐患综合探测车
超深探测大功率地质雷达车
At 8 p.m. on June 7, 2021, a water inrush accident occurred during the excavation of a section of Beijing Winter Olympic branch tunnel, and the water inflow reached 300 m3 / h. After the incident, the ultra deep detection high-power geological radar was used for ultra deep detection of the specified mileage section. A water rich area with a depth of 17.2-23.0m and a horizontal length of 12.5m was found near the tunnel face. At the same time, another water rich area with a depth of 16.5-22.1m and a horizontal length of 10m was predicted 40 meters in front of the tunnel face. Afterwards, the ground penetrating radar detection was carried out in the tunnel, and there were wooden piles, broken coal and other sundries gushing out near the water inlet of the tunnel face. After visiting the surrounding area and consulting relevant data, it was preliminarily judged that the accident section was the roadway of the early abandoned small coal mine. After a long time of surface water leakage, the roadway was filled with water, which may be the main reason for the sudden water gushing in the tunnel face.
Aiming at the engineering geological hidden dangers in different periods such as "urban lifeline project" - Metro Tunnel planning and survey, tunnel construction and operation, Beijing Zhuzong group has carried out intelligent detection of metro tunnel foundation pit ultra depth and ultra front, comprehensive detection of metro tunnel safety hidden dangers, uneven detection of slurry injection outside shield segment, and built an intelligent diagnosis and early warning platform for metro tunnel safety hidden dangers, Provide technical support for subway tunnel construction and operation safety.
Subway tunnel safety hidden danger comprehensive detection vehicle
Ultra deep exploration high power geological radar vehicle
