Knowledge Base

If your site conditions have changed resulting in a loss of depth to your borehole either at the top or the base of the hole, either through damage to the top of the tube or collapse at the bottom and you still require to collect and present the data there are a few options for this scenario. This knowledgebase article presents the options you have to process this data through In-Site.

The first option would be to have two deflection graphs, an initial deflection graph that leads up to the date when the borehole was shortened and then a deflection graph for after the event occurred on site. The first reading taken after the event on site would act as your new base readings and all readings on the second deflection graph would show movement from this point on. We would recommend this as no further data reduction is required and the damage to the borehole may have changed the borehole deflection.

If you would rather have one continuous borehole deflection graph for before and after the event there are two further options available. Firstly you can continue with the original borehole set up on the field PC and upon reaching the depths that are no longer required you can take the readings at the last available depth e.g. if the final metre of the borehole is no longer available to take readings from, at the last available depth take the final two readings by pressing the read button without moving the probe and then repeat this process on the A180 readings. This will mean that when importing the files into In-Site you will be able to view them on the previous deflection graph however the final readings will be meaningless after the date of the change on site.

Tip: we would recommend backing up your In-Site database before under going the following steps

The final option is more complex and should only be considered by experienced In-Site users as it involves copying readings and removing the top few readings for all your previous readings on the new site.

Your final option is to:

Create a new borehole in In-Port with the same start depth but with a the new end depth.
Once the readings have been completed import the runs into In-Site under a new name.
You then need to copy across all your previous borehole runs from before the borehole was changed by selecting each borehole run in In-Site
Selecting 'Edit/Add' function in the bottom left and then making a copy by moving it to the new borehole.
Once this has been completed and all the runs are in the new site as well as the old site, you will need to remove the top readings to ensure that there are the same amount of depths on each run in the new site. To do so please select the 'Edit/Add' function.

Then highlight the row you wish to delete (click on the grey box next to the row) and press the delete key and confirm the delete when asked.

Once all the old borehole runs have the same amount of depths as the runs taken since the change to the borehole you will be able view them all in the same deflection graph. You will then be left with one set of readings prior to the changes made to the boreholes depth and one set of readings for the whole monitoring period without the top few depths.