GAS LEAK PROTECTIVE DEVICE FOR ANCHOR ROD HOLE THROUGH CEILING SLAB OF WORK CHAMBER IN PNEUMATIC CAISSON

摘要

PROBLEM TO BE SOLVED: To provide a gas leak protective device which can follow eccentric quantity of an anchor rod penetrating a ceiling slab of a work chamber of a pneumatic caisson.;SOLUTION: This device is provided with a seal pedestal 6 having a groove 19 at the periphery of a cross section of an opening part in which an anchor rod 4 can be inserted, and a seal 5 engaged in the groove 19 in the seal pedestal 6 to be freely slidable.;COPYRIGHT: (C)2002,JPO