Construction method allowing nodular cast iron pipe to penetrate water-containing soil layer

A ductile iron pipe and construction method technology, which is applied in the direction of pipe laying and maintenance, pipe/pipe joint/pipe fittings, machinery and equipment, etc., can solve problems such as difficulty in elimination, and achieve prevention of groove collapse accidents, effective water supply guarantee, and reasonable process. Effect

Inactive Publication Date: 2018-06-29
JINCHUAN GROUP LIMITED
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Problems solved by technology

[0003] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a construction method for ductile iron

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  • Construction method allowing nodular cast iron pipe to penetrate water-containing soil layer
  • Construction method allowing nodular cast iron pipe to penetrate water-containing soil layer

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Embodiment Construction

[0016] A construction method for ductile iron pipes passing through the water-bearing soil layer. Taking a DN1000 ductile iron water delivery project as an example, the total length of the pipeline network is 20km, the design pressure is 2.5MPa, and the average buried depth is about 3.1m. About 16km of the entire pipeline is laid along the flood control riverbed. The geological conditions in the river channel are complex, the groundwater level is high, and the construction is very difficult.

[0017] The construction process includes trench excavation, groundwater drainage, pipe trench collapse treatment, pipeline installation, pipe trench backfill, hydraulic test, safety measures and other aspects and links.

[0018] 1 trench excavation

[0019] Determine the cross-sectional form of the trench before excavating the trench. Since the soil type of the project is 3-6 types of soil and the groundwater level is between 1.2m, the cross-sectional form of the trench adopts a combinat...

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Abstract

The invention relates to a construction method allowing a nodular cast iron pipe to penetrate a water-containing soil layer, relates to a method allowing the nodular cast iron pipe to penetrate the water-containing soil layer to be laid, and is suitable for laying construction of the soil layer with the higher underground water level. The construction method is characterized in that the construction process comprises the steps of groove excavation, underground water drainage, pipe ditch landslide treatment, pipe installation, pipe ditch backfill and hydrostatic testing. According to the method, the groove excavation cross section adopts a manner combining a straight groove and a dovetail groove, the water level height of the underground water is effectively controlled, a sloping bamboo diving board hack lever supporting scheme is adopted for strengthening, the groove collapse accident is prevented, the pipe installing and hydrostatic testing technology is reasonable, the problems thatthe difficulty of water removal can be overcome, and the pipe ditch landslide and pipe installing difficulties are large are solved, construction allowing the nodular cast iron pipe to penetrate the water-containing soil layer is achieved, and effective water supply guarantees are provided for production.

Description

technical field [0001] The invention relates to a construction method for a nodular cast iron pipe passing through a water-containing soil layer, relating to a method for laying a nodular cast iron pipe through a soil layer containing groundwater, and is suitable for laying and laying construction in a soil layer with a relatively high groundwater level. Background technique [0002] The water supply system is an important supporting project in the production of large-scale non-ferrous metallurgy and chemical complexes integrating mining, selection, metallurgy and chemical production. In the process of laying water supply system pipelines, it is very difficult for ductile iron pipes to pass through the soil layer containing groundwater. The pipe network of the water delivery project is long and the design pressure is high, so it needs to be buried deeply. The pipe interface adopts the T-shaped rubber ring slide-in interface. Pipelines are often laid near the riverbed. Due t...

Claims

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Application Information

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IPC IPC(8): F16L1/028
CPCF16L1/028
Inventor 甘奎举马咏雁尤安宁
Owner JINCHUAN GROUP LIMITED
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