In this article we will introduce an application of ADM. Please see this picture first. It’s a slope mountain. Under the mountain there is a river. We have a high-speed rail go across the foot of mountain, along with the river. The government had used INSAR technology knew that this slope mountain may have the risk of landslide. But they don’t know which is the exactly direction of deformation, what is the speed of the deformation, and when will it be dangerous? If the landslide happens, it may block the river and lead some disaster.

That means this slope mountain needs high accuracy deformation monitoring in depth. We get this project and use our ADME to monitor.

(We totally installed 3 borehole devices, one 100m depth, two 50m depth. 100m depth has the longest time, so we use this as sample, the borehole number is CX3-5)

       Model: ADME-100, 1m/segment

       Total Length: 100m

       Data Collect Frequency: 1 time/ 30 minutes

       Start Time: 15^th December, 2018

       End time: 21th August, 2020

       Total Monitor time: 20 months.

 Now we already stop this monitor project. Because the high-speed rail has changed its way, and government also had taken protection solution. Here we just analysis the data.

       The history data link is:  http://tsy.huasi-measure.com/

       Account is: tsy001

       Password is: tsy001

(We already get the permission to use this data as demonstration data, and this account is just a visit account, just can visit history data, can’t edit)

1.Here we check the data from 15^th December 2018 to 21th August 2020. Data interval is 30 days.

Next picture shows the deformation in X(Left) axis and Y(Right) axis. We can see from the picture the deformation begins from the depth of 94m, the maximum deformation of X is about 60mm, the maximum deformation of Y is 80mm. Then we can have this conclusion:

(1)The dangerous landslide layer is in 95m depth.

(2)Depends on the deformation of X, Y we can calculate an approximate landslide volume which will help us to use the best protection solution.

2.Here is another picture, I select Node 280276 as sample to explain. This picture shows the “Cumulative displacement trend chart”. Red line shows for X direction, blue line shows for Y direction. We can get such information from this picture.

(1)From 13^th February 2019 to 13^th July 2019, X direction was keeping deforming, the maximum deformation is 54mm. From 13^th July 2019 to 12^th August 2019, X has a deformation in the opposite direction. From 12^th August 2019 till now, X has a very little deformation, the total deformation is stable in 45mm.

(2)From 14^th April 2019 to 13^th July 2019, Y’s deformation is about 12mm. But from 13^th July 2019 to 12^th August 2019, Y’s deformation is up to 50mm. That means the mountain has a big deformation in just one month. But after 12^th August 2019, to now, Y’s deformation also becomes stable.

3. Here is the third picture. I also use Node 280276 as sample. From this picture we can see the deformation direction in X-Y coordinate system. And we can know the where is X-Y direction in reality. That means we can know the deformation direction of this slope mountain in our real world. After checking the picture, we can know that the deformation is toward for Southeast direction.

Finally, from the data analysis, we can know that the maximum deformation stated in February 2019, stopped in July 2019. The landslide layer is in 95m depth. And the deformation direction is Southeast.

Our monitor software also can early alarm the deformation. Based on these data, we can take protection in advance to avoid disasters.

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