Recently, the sixth bid section of the Sino-Russian East Route Natural Gas Pipeline passed through the Qi Great Wall site and was officially towed back in Feicheng County, Tai’an City.
Due to the complex terrain of the crossing plant area, mostly granite hard rock formations, in order to better protect the cultural relics of the Qi Great Wall site, the pipeline is traversed by means of directional drilling.
The back towing site is undulating and has a large height difference, and it does not have the conditions for excavating and sending trenches. Dozens of pipelayers and cranes are used to cooperate in the whole process to prevent pipeline friction, which puts forward higher requirements for the back towing method and lifting equipment. requirements.
We finally selected four Sany cranes of 80-100 tons to participate in the pipeline back towing construction.
The total weight of the steel pipe of the return towing pipeline is about 680 tons, and the total length of the pipeline is 721m. The occupation of each crane equipment is different, and the lifting weight varies from 30 to 45 tons. During the lifting process, the crane equipment needs to lift the load pipe to move the swing arm. One turn moves 9.6 meters.
Sany cranes hoist the second half of the pipeline. The four Sany cranes are highly efficient and efficient. They hoist and move once every 6-8 minutes, which is nearly twice as fast as the original hoisting speed. The construction of the crane hoisting and towing was completed within 2 days.
At the position of dragging in 300 meters, the Sany crane can leave the site, and the whole process will be towed in by the pipelayer.
The directional drilling crossing project was successfully pulled back, creating favorable conditions for the smooth penetration of the entire Sino-Russian east route project (Anping-Taian) section.
Post time: Mar-03-2022