METHOD TO ASSEMBLE INVENTORY LOW-WATER BRIDGE ON SCREW PILES BY SPAN LAUNCHING Russian patent published in 2012 - IPC E01D21/00 

FIELD: construction.

SUBSTANCE: assembly site is equipped on an entry bank for incremental assembly of a span from rolled metal products on roller assembly trolleys, than the bridge inventory property is stocked nearby, and elements of serial screw supports are stocked near water edge. A 40-ton ferry from a set of a pontoon-bridge park (PBP) is dropped on water, and a special purpose vehicle KrA3-255B (KrA3-260) is installed on the ferry from the PBP set, equipped with a fixator cartridge of screw piles, with elements of serial helical supports laid onto the ferry with an autocrane, and it is installed into the bridge range at the value equal to the rated span of the bridge from the coastal support trolley, a screw pile is inserted into a fixator cartridge with a regular weight-lifting boom of the special purpose vehicle, a detachable capstan is put on and fixed on it. A rope of a regular hoist is entered into the capstan, and a pile is screwed into soil by means of rope unreeling from the capstan, after the pile has been submerged to the design elevation, the ferry is moved on anchors across the bridge axis, and the operation is repeated with the second pile. Then the ferry is driven into the bridge axis, the weight-lifting boom of the vehicle is used to mount a crossbar and a support trolley of a serial screw support, the ferry with the pile-driving equipment is slung with a span assembled on the assembly site as a continuous system with the help of joint pads, and a boat is used to launch the bridge over one span, afterwards the ferry with the pile-driving equipment is moved into the second span, and the operation of assembly of a serial screw support and launching is repeated, the bridge is moved into the last span from the opposite bank, using the special purpose vehicle removed from the ferry, afterwards the traffic area and the breast rail are assembled manually, and exits from the bridge are arranged.

EFFECT: reduced labour inputs, higher efficiency of low-water bridges construction under wartime conditions, disasters and emergencies.

1 cl, 8 dwg