基于重力场和磁场测量的地下管道三维探测研究  

3D Detection of Underground Pipelines Using Magnetic and Gravity Field Measurements

作　　者：司永峰[1,2] 王永[2] 

机构地区：[1]同济大学海洋与地球科学学院,上海200092 [2]上海市地质调查研究院,上海200072

出　　处：《上海国土资源》2013年第1期76-80,共5页Shanghai Land & Resources

摘　　要：水平定向钻技术敷设的地下管道的探测问题是目前工程物探中的难题。本文采用自主研发仪器,通过测量管道内各点的重力场和磁场分量值,获取管道空间曲线的切向量参数;结合测点间距参数,构建传感器运动轨迹的三维曲线,实现了非开挖地下管道的探测;并采用数值方法校正了各传感器轴间的正交性及同轴性,有效减小了磁方位角及倾角的测量误差。通过物理模型试验及实际工程应用,验证了该探测方法的有效性及便捷性,具有实用推广意义。Recently, the detection of underground pipelines laid by horizontal directional drilling has become an increasingly difficult problem for engineers and geophysicists. We have developed an instrument to measure the component strength of magnetic and gravity fields at different points along an underground pipeline, which can be used to calculate the tangent vector parameters of the pipeline＇s curved path. By using the distance between measured points, a 3D curve of the sensor＇s movement trajectory is generated that can detect trenchless underground pipelines. A numerical method is used to correct the orthogonality and coaxiality of the sensor＇s axes. Measurement errors of magnetic azimuth and inclination angle are decreased effectively. The validity and convenience of this detection method has been tested and verified using a physical model and in practical engineering applications.

关 键 词：工程物探 非开挖地下管道 三维探测 重力场 磁场 姿态测量 

分 类 号：P631[天文地球—地质矿产勘探]