METHOD OF ARRANGING SUBSURFACE CHAMBER TO STORE CABLE BOXES AND STOCK Russian patent published in 2009 - IPC G02B6/50 

FIELD: production processes.

SUBSTANCE: proposed method relates to fiber-optical equipment and can be used in construction and operation of fiber-optical communication lines laid in conduit runs made up of plastic pipes and subsurface chambers. The proposed method comprises excavating the foundation ditch, making the consolidated sand bed, fitting the chamber in the ditch and connecting it with the conduit run. Then, the chamber is partially backfilled with frost-free soil and mechanical protection is mounted, the said protection representing, for example, a metal screen with a maximum mesh size not exceeding 190 mm and covered from above and below with a material that features a low adhesion to frozen ground. Now, the foundation ditch is filled with excavated soil. Note here that back-filling is made layer-by-layer, the layers being spaced with the material with low adhesion to frozen ground, for example, a polyethylene film, its edge being bent down.

EFFECT: reduced time and costs of scarification and ditch opening, safe access to chambers at lower temperatures.

3 cl, 1 dwg