高精度重力测量在香港石硖尾滑坡治理区的应用  

THE APPLICATION OF THE HIGH-PRECISION GRAVITY METHOD TO THE SHIXIAWEI LANDSLIDE-TACKLING AREA, HONG KONG

作　　者：许德树[1] 卢景奇[2] 李元厚[2] 李晓昌[2] 于德武[2] 

机构地区：[1]中国地质大学,北京100083 [2]中国地质科学院物化探所勘查地球物理开放实验室,河北廊坊065000

出　　处：《物探与化探》2004年第4期345-348,共4页Geophysical and Geochemical Exploration

摘　　要：介绍了采用5m网度的高精度重力测量进行工程勘查的方法技术,包括测地技术、重力测量技术和三维反演技术。通过对已知山顶建筑物工程设计参数进行重力影响的消除,实现了人文干扰的改正。采用精确的直立棱柱体理论重力异常正演公式进行正演,并采用广义逆的方法进行反演,获得了香港九龙石硖尾滑坡治理区新鲜花岗岩基顶面起伏的构造特征。与钻探结果对比表明,该花岗岩基顶面深度图结果可靠。This paper describes the techniques of applying 5 m network high-precision gravity survey to engineering exploration, which include geodetic survey, gravity survey and three-dimensional inversion. Through the elimination of gravity influence on the engineering design parameters of the hilltop buildings, the human interference correction was realized. The forward calculation was made by using the precise forward formula for theoretical gravity anomaly of vertical prism, and the inversion was also conducted with the generalized inverse method. As a result, the structural characteristics of the top relief of the fresh granite batholith in the Shixiawei landslide-tackling area in Kowloon of Hong Kong were revealed. A comparison with the drilling result shows the reliability of the depth contour map for the top surface of the granite batholith.

关 键 词：测地技术 重力 滑坡 棱柱体正演 广义逆反演 花岗岩 

分 类 号：P631.1[天文地球—地质矿产勘探]