I assume you mean the west end. It is the end point of the huge Burnhamthorpe water pipe project. You can see a huge shaft at the north east corner of that section. It is also being used as a staging and storage area by the project’s construction companies.
The second crane for M2 is going up and it looks like they are preparing the base for a second crane in M1 as well. These building have large podiums and thus need the extra lift coverage.