1. Project overview

The work area is located in the Tianziling landfill site in the northern suburbs of Hangzhou City. The overall terrain is a valley surrounded by mountains on three sides. The landfill site is located at the eastern end of the valley. The objective of the project is to investigate the geological conditions at the bottom of the landfill and around it to determine whether there is leakage.

Equipment used: IGU-16HR 5Hz 20 sets

Collection method: linear arrangement, 15min

Acquisition parameters: 2ms, 12dB

2. Project characteristics

First of all, there are more sources of interference in the construction area, such as power plants for waste reuse, such as vehicles coming and going, and the interference caused by the operation of many large equipment, and the electromagnetic interference in the park is large, and the electromagnetic method cannot be used. The micromotion method is less restricted by the site and is very suitable for the use of this scene. Then part of the measurement line is on the road in the park, with the triangular tail vertebrae, it is convenient to construct on the hard road. Through the field test, 1m point distance, 11 devices to extract the dispersion curve, 15min acquisition time has reached a depth of about 70m, the effect is very good.

3. Data results

There are four survey lines in this project, and P1 is a long survey line around the entire landfill site, with a total length of about 500m. The measured results are basically consistent with the information of the monitoring well, and it can be seen that there is no vulgar area under the whole site, indicating no leakage and other conditions. Then there is a dam body in the first half of the measurement line P4, and the obtained data can also be clearly seen that there is a low speed area. The cesspool in P3 and the cesspool well in P2 can also be seen in the data as an obvious low-speed zone.