Engineering case

Engineering case

Engineering Cases
Leakage Detection of a Landfill Site in Jiangsu Province by High Density Electrical Method

engineering case

Leakage Detection of a Landfill Site in Jiangsu Province by High Density Electrical Method

Among them, F2 - 2 and F2-3 show low resistivity anomalies, which are relatively different from the resistivity of the surrounding rock, and the abnormal gradient on both sides is steep, and then according to the geological data, it is determined as the fissure channel of groundwater leakage pollution from the garbage dump to the downstream.

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Investigation of Loess Landslide in Shaanxi by High Density Electrical Method

engineering case

Investigation of Loess Landslide in Shaanxi by High Density Electrical Method

Due to the complex geological conditions in the landslide, the Wenner device with stable measurement signal and strong anti-interference ability is used. It can be seen from the map that there is low resistivity anomaly in 54-180m in the horizontal direction and 20-40m in the vertical direction. Combined with the landform features of many valleys, loose soil, many saggalls and obvious fissure development in the survey area, it is speculated that it is the saggave anomaly area, where the slope is large, and the overall bedding landslide will occur in case of heavy rainfall or earthquake due to overall instability.

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High-density electrical method for gold exploration in a certain area of Yunnan

engineering case

High-density electrical method for gold exploration in a certain area of Yunnan

The upper one is the apparent resistivity inversion map, and the lower one is the polarization inversion map. It can be seen from the map that the granite with high resistivity and high polarization is ore-bearing

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High-density electrical method for karst cave exploration in Guizhou

engineering case

High-density electrical method for karst cave exploration in Guizhou

After dissolution, the rock mass is generally filled with water or mud, and the resistivity is relatively low. As can be seen from the figure, the strata are divided by overburden and bedrock. There is a low resistance body in the bedrock, 80-120m in the horizontal direction and 15-30m in the vertical direction, with a resistivity range of 40-90 Ω * m, which is inferred to be a karst cave based on geological data. After drilling and verification at 95 meters, karst caves filled with mud-water mixture were found in the range of 23-30 meters deep, which is consistent with the high density detection results.

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High-density resistivity method for groundwater exploration in a certain area of Hubei Province

engineering case

High-density resistivity method for groundwater exploration in a certain area of Hubei Province

The high-density electrical method measures the apparent resistivity of the underground medium through electrode power supply and reception. The apparent resistivity directly reflects the conductivity of the underground medium. For example, when looking for water under bedrock, the conductivity difference of bedrock is very high, while the conductivity of water is good. The apparent resistivity is low. In the inversion diagram, the shape and depth of the water-bearing area and bedrock can be easily distinguished.

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SURVEY OF GROUND SUBSIDENCE IN ZHEJIANG

engineering case

SURVEY OF GROUND SUBSIDENCE IN ZHEJIANG

It is ZK3-18C that there are red areas with large electromagnetic wave absorption coefficient in 10-18 meters underground and 10-17 meters ZK3-18A, which are abnormal areas. Combined with the drilling data, it is inferred that the water-containing cave is the cause of ground collapse.

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