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The bridge frame completes the WHZQ-1 standard 32 meters 900 tons of full-hole box girder and safely passes through the tunnel. The rest are all 450 tons of combined box girder. Because the bridge machine could not meet the needs of the combined box girder erection, under the command of the technical supervision team of the 25th Bureau Group, the equipment technical group organized technical research and technical consultation, optimized the equipment design, and began to set up a special equipment. The major techniques of the two beams are being tackled. Through repeated demonstrations, technical personnel and on-site management personnel reached a consensus with relevant experts of Wuhan Machinery and Equipment Research Institute to replace the folded part of the No. 1 column leg of the original bridge machine, widen and strengthen the support point; Beam, replace the trolley, reduce the overall external structure size of the trolley, which is more conducive to lateral movement, to increase the lateral displacement of the beam; change the center distance of the beam suspension point to be smaller, and the other 2 and 3 column beams are adjusted accordingly. higher. After the improvement, the crane can be used to traverse, the falling beam can be placed once, reducing the safety risk caused by multiple moving beams, shortening the time period of erecting the combined box girder, reducing the construction process, reducing the cost, and erecting safely and quickly. Passenger dedicated bridges provide equipment support.
In the remaining 93-piece combined box beam transport frame of the Wuhe Passenger Dedicated Line, the modified JQ900A-type tonnage bridge machine will complete all erection tasks safely, quickly and efficiently, but it will also undergo four disintegrations to cross four tunnels. On February 15th, 2008, all the bridges of WHZQ-1 can be connected, which greatly saves the construction period.
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After 8 days of intense and intense assembly and debugging, China Railway Construction 25th Bureau Group Guangzhou Company completed the modification of the 900-ton bridge machine. At 12 o'clock on November 4th, it successfully set up the first bridge in Wuhe Passenger Line. A combined box girder weighing approximately 450 tons marks the success of a bridge machine that can erect 900 tons of full-hole box girder and 450 tons of combined box girder.