Construction method and facilities of steel trestle bridge with percussion drilling limit hole implantation combined with crawler crane

Abstract

The invention discloses a steel trestle construction method and facility with percussion drill limiting pore-forming implantation and a crawler crane combined. The construction method comprises the steps that construction is carried out from one end of a steel trestle to the other end of the steel trestle one by one so that the complete trestle can be constructed, and the next span of cantilever beret piece beam is formed on the previous span of steel trestle which has already been constructed; a limiting rack and a percussion drill are fixed to the next span of cantilever beret piece beam through double-buckling H-steel and deformed steel bar U-shaped clamps, and accordingly the plane position of the overhung limiting rack is located at the plane position of the next span of steel pipe piles of the steel trestle; a steel casing is placed in the limiting rack, and a hammer of the percussion drill hammers bedrock in the steel casing so that pile holes can be formed. According to the steel trestle construction method and facility, under the construction conditions of heavy flow of water and oblique river bed rock surfaces, there is no need for operators to drill a trestle pipe pile foundation by blasting through underwater operation, overwater equipment such as a ship does not need to enter the scene, the potential safety risks of operation by the operators and the ship under the condition of heavy flow of water are avoided, engineering cost is lowered, and construction safety is improved.

Description

technical field [0001] The invention relates to a construction method and facilities of a steel trestle bridge, more specifically to a construction method and construction facilities of a steel trestle bridge in rapid water flow, the river bed is inclined bedrock without covering layer, and ships cannot enter the construction area. Background technique [0002] The conventional construction method of the steel trestle bridge is to use steel pipe piles and Bailey sheets as the main load-bearing structure, and erect them disassembled on site, that is, to use the crawler to hang on the erected first-span trestle bridge, insert and drill the trestle foundation hole by hole, and hoist the bridge deck structure. After one span is completed, the crawler crane moves to the next span and advances the construction step by step. However, with the traditional steel trestle construction method, under the impact of rapid water flow, it is difficult to position the steel pipe piles of the ...

AI Technical Summary

Problems solved by technology

Under the environmental conditions of the rapid water flow in the reservoir area of ​​the hydropower station and the slope of the rock surface without covering layer on the river bed, the conventional steel trestle construction method cannot guarantee its structural safety

Images