Construction method for integral installation of river-crossing sinking pipe

Abstract

The invention provides a construction method for integral installation of a river-crossing sinking pipe. The construction method includes the following steps that steel plate piles are driven into river bank pipe ditch positions of river banks on the two side to form a cofferdam; a back shovel is used for digging out river bank pipe ditches in the cofferdam; a dredger with a long arm back shovel is used for digging out a river channel pipe ditch; two cranes are used for lifting a sinking pipe pipeline, an excavator is used in cooperation for moving the sinking pipe pipeline into the river bank pipe ditches, and pipe pressing and backfilling are conducted after the sinking pipe pipeline is sunk and positioned; and integral installation of the river-crossing sinking pipe is achieved through the above steps. Due to the scheme that the cofferdam is arranged on the edges of the river banks through the steel plate piles, the back shovel is used for digging, and the scheme that the dredger with the long arm back shovel is used for digging the river channel pipe ditch located in the middle of a river channel is used in cooperation, compared with the prior art, the sinking pipe pipeline can be integrally constructed at a time, cofferdam connecting pipes do not need to be additionally arranged on the two banks of a river after the sinking pipe pipeline is installed, and the construction difficulty is lowered.

Description

technical field [0001] The invention relates to the field of municipal engineering construction, in particular to a construction method for overall installation of immersed pipes across rivers. Background technique [0002] At present, in the field of municipal engineering construction, sewage pipes and water pipes crossing rivers are generally constructed in the way of cofferdam diversion. First, the diversion channel is excavated by the cofferdam, and then pipe layout, assembly, welding, etc. are carried out at the construction site. There is also the method of building two barrages to drain the water in the dam and carry out pipeline construction. For rivers that require navigation, the above method has the problem of interfering with navigation for a long time. There are also pipe jacking techniques used to cross rivers. Most of the pipe jacking pipe materials are rubber and plastic, which are thermally butted on site to form a whole pipe. The existing problems are poor...

AI Technical Summary

Problems solved by technology

There are also pipe jacking techniques used to cross rivers. Most of the pipe jacking pipe materials are rubber and plastic, which are thermally butted on site to form a whole pipe. The existing problems are poor pressure bearing capacity, difficult to eliminate quality defects, and high cost.

Municipal pipelines cross rivers with navigable requirements. Considering that the navigation standards of river channels may need to be improved in the future, the buried depth of pipelines is often required to exceed 6 meters below the water surface, which brings greater difficulty to the construction of pipeline crossings.

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