How do I get past the second plaster wall?

Hint 1 of 9:

The second plaster wall is in the passage (which is right after the first
one).

Hint 2 of 9:

 The hieroglyphics are supposed to help.

Hint 3 of 9:

Another way is to try to break open the plaster door with the axe.

Hint 4 of 9:

This will kill you of course, but it will give you a clue.

Hint 5 of 9:

You need to find some way to not fall into that pit.

Hint 6 of 9:

Put the beam in between the niches.