DID you apply Photoshop to this photo then, Monsieur Matthieu? It does not show that much!
I like your choice of subject matter here, and your getting close. You play with the geometry of things, all rectangles or little squares ... and then come the rounded shapes of the hard hats. Cool.
I think there is yet more in this photo, though.
Play with Photoshop to your heart's content. Just play. You need not take the outcome too seriously, but you might come to a point where you say, hey, this is a version that I really like.