Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (3): 837-844.doi: 10.13278/j.cnki.jjuese.20180201

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Rapid Detection of Urban Underground Cavity Based on Vehicle Gravity Measurement Platform

Wang Xinyue1, Liu Jie1, Sun Pengyong1, Chen Ke2, Li Jun2   

  1. 1. College of Instrument Science & Electrical Engineering, Jilin University, Changchun 130026, China;
    2. Chinese Academy of Weapons Science, Beijing 100089, China
  • Received:2018-09-25 Online:2019-05-26 Published:2019-06-03
  • Supported by:
    Supported by Geological Survey Project of China(2018c-05-142)

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Abstract: Gravity and its related measurement technology are widely used in underground cavity detection. The widely used static gravity survey has many problems such as difficulty in work and low efficiency when used for urban gravity detection. Although the dynamic gravity measurement based on mobile platform is widely applied in the field of sea and space, it is seldom used in underground cavity detection. In view of the shortages of the static gravity measurement method, a rapid detection method of urban underground cavity based on vehicle borne gravity measurement platform is proposed. In this study, a vehicle mobile gravity measurement platform was built by using domestic high precision strap-down gravimeter SAG, which was tested near Changchun Satellite Square. First of all, the measurement data were corrected to void the building interference; and then, the gravity anomaly data were measured with ratio DEXP (depth from extrme points); and finally, the tilt gradient method was used to identify the site boundary. The location of underground light rail station was determined, by which the feasibility and effectiveness of vehicle mounted platform gravity measurement in urban underground cavity detection are verified.

Key words: vehicular gravity measurement, urban underground cavity, building interference correction, ratio DEXP, Tilt gradient

CLC Number: 

  • P631.1
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