Method for monitoring the emplacement of a transportable element and the tightness of its joint with a fixed structure, and the use of this method

Method for monitoring emplacement of a transportable element on an abutment surface of a fixed structure, said transportable element having an abutment surface and at least two compressible annular sealing joints arranged inside each other and protruding from said abutment surface of said transportable element, said method comprising the steps of

• (a) measuring a pressure of a gas in a space lying between said sealing joints and bounded by said abutment surfaces of said transportable element and of said fixed structure, continuously during emplacement of said abutment surface of said transportable element on said abutment surface of said fixed structure so that said transportable element comes to bear on said fixed structure through said joints which undergo progressive compression during said emplacement;
• and
• (b) comparing at least one value of the pressure measured during said emplacement with at least one predetermined value corresponding to a correct emplacement of said transportable element.