Construction method for river crossing pipeline

A construction method, technology for crossing rivers, applied in the direction of laying and repairing pipes, pipes/fittings/fittings, machinery and equipment, etc.

Inactive Publication Date: 2004-12-29
NO 3 BRANCH OF SHENGLI PETROCHEM BUILDING CO LTD SHENGLI OIL FIELD
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  • Abstract
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Problems solved by technology

None of the above-mentioned existing technologies can solve the constructio

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  • Construction method for river crossing pipeline
  • Construction method for river crossing pipeline

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Embodiment Construction

[0014] An embodiment is described with reference to the accompanying drawings:

[0015] like figure 1 As shown, the construction procedures of the present invention are: construction preparation, measurement and lay-out, underwater trenching, drifting and sinking, and backfilling of stabilized pipes. The technical content of each process is: the construction preparation process includes pipeline prefabrication and flaw detection, anti-corrosion layer detection and repair, pipe end plugging, floating tank hauling, launching and assembly, and excavator floating tank. The measuring and laying-out process includes inserting marks and flagging the center line and edge line, and determining the dimension data of the pipe trench. The underwater trenching process includes trench trenching and measurement at the bottom of the river, trench trenching at the grading section on both banks, and pipe trench leveling. The process of floating and sinking includes digging and sending ditch, ...

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Abstract

The present invention discloses the construction process of pipeline through river and belongs to the field of underwater pipeline laying technology. The construction process features the underwater excavating with long-arm single-bucket excavator in prefabricated floating camel, the drawing of floated pipe with sealed ends with construction machine to place, the refilling water to the pipe for depositing to pipe canal, and final pipe pressing, stabilizing and refilling. The construction process includes the steps of preparation, measurement and setting out, underwater excavating, floating pipe and depositing pipe, stabilizing pipe and refilling. Compared with available technology, the present invention has the advantages of short construction period, low cost, no influence on navigation, construction safety and no environmental pollution.

Description

(1) Technical field [0001] The invention relates to a construction method for laying pipelines under water, and its basic technical features are underwater trenching and floating and immersed pipes, which are called "pipeline crossing river construction method". (2) Background technology [0002] Pipelines crossing rivers, especially navigable rivers, is called the "throat project" in the construction of long-distance pipelines. It is not only technically difficult and requires a lot of investment, but also has a long construction period and high risks. In March 1970, our company adopted the "wet top method of mud circulation secondary pipe release" for the first time in China, and successfully passed the oil pipeline with a length of 474 meters and a diameter of 159 mm across the bottom of the Yellow River. Two years later, the "mechanical propulsion, hydraulic scouring, and curve crossing secondary pipe jacking method" was adopted for the first time in China. The complex-...

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Application Information

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IPC IPC(8): F16L1/00
Inventor 蒿振亮张克明菅宪忠高勇刘勇李新峰衣华锋
Owner NO 3 BRANCH OF SHENGLI PETROCHEM BUILDING CO LTD SHENGLI OIL FIELD
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