In this paper, using data information from several gravity measurement points with significant variation in Shandong Province, combined with fieldwork and mathematical model calculations, the scientific conclusion that the change of gravity increases when filling or adding buildings near the measurement point and decreases when excavating near the measurement point is drawn, i.e., the addition or absence of mass around the measurement point has a certain influence on the regional gravity field. At the same time, the mathematical model calculation due to the taken density and other media parameters are only regional averages, the model calculated value and the actual mass increase or decrease caused by the gravity change has a certain deviation, can only roughly estimate its effect on the gravity change of the measurement point, but the study can make the gravity measurement value becomes relatively more reliable, and has practical significance for the in-depth analysis of the change of gravity observation data.
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