Pipe periphery backfilling material suitable for flexible pipeline and preparation method and backfilling method of pipe periphery backfilling material

A technology of flexible pipes and admixtures, which is applied in sewer pipe systems, waterway systems, buildings, etc., and can solve the problems of non-compact backfilling at the axillary corners of flexible pipes, failure to meet the required compactness, and supercritical instability of flexible pipes. Achieve the effect of reducing the risk of soil loss around the pipe, improving the efficiency of backfilling operations, and reducing road surface subsidence

Inactive Publication Date: 2021-07-13
SHANGHAI URBAN CONSTR MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a pipe circumference backfill material suitable for flexible pipelines and its preparation method and backfill method, which overcomes the supercritical failure of flexible pipes caused by the pipe circumference backfill materials used for flexible pipelines in the prior art. Stable, flexible pipe backfilling is not dense, layered compaction efficiency is low, the speed is slow and cannot meet the required compactness, and the backfilling cost is high.

Method used

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  • Pipe periphery backfilling material suitable for flexible pipeline and preparation method and backfilling method of pipe periphery backfilling material
  • Pipe periphery backfilling material suitable for flexible pipeline and preparation method and backfilling method of pipe periphery backfilling material
  • Pipe periphery backfilling material suitable for flexible pipeline and preparation method and backfilling method of pipe periphery backfilling material

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preparation example Construction

[0050] figure 1 For the process flow chart of the preparation method of the pipe circumference backfill material suitable for flexible pipelines in the embodiment of the present invention, please refer to figure 1 , the embodiment of the present invention also provides a method for preparing the above-mentioned pipe circumference backfill material suitable for flexible pipelines, including:

[0051] S101, weighing each component according to the amount of each component;

[0052] S102. Mix and stir the components evenly to prepare the mixture of the surrounding backfill material suitable for flexible pipelines.

[0053] In some embodiments, the stirring time is 3 to 15 minutes.

[0054] In some embodiments, the initial expansion of the mixture of circumferential backfill materials suitable for flexible pipelines is greater than 550 mm.

[0055] figure 2 For the process flow diagram of the backfill method for the pipe circumference backfill material suitable for flexible p...

example 1

[0062] The flexible pipe used in this example is: a commercially available flexible pipe made of FRP sand pipe or HDPE (high density polyethylene) with a diameter of DN1000-2000.

[0063] The formula of the surrounding backfill material suitable for flexible pipelines used in this example is:

[0064] 310Kg of water, 30Kg of cement, 370Kg of fly ash, 1100Kg of fine sand, 127Kg of stone powder, 7Kg of accelerator, 3.5Kg of water reducer, and 0.775 water-binder ratio (water-binder ratio refers to the water consumption per cubic meter of concrete and all cementitious materials Dosage ratio).

[0065] Wherein, the accelerator used in this example consists of 20% CaO, 38% SO 3 and 31% Al 2 o 3 Composition, the water reducer is a polycarboxylate water reducer. Preparation method and backfilling method:

[0066] (1) Filler mixing: Weigh each component according to the amount of each component, mix each component, and stir for 3 to 10 minutes, so that each component is fully mixe...

example 2

[0074] The flexible pipe used in this example is: a commercially available flexible pipe made of FRP sand pipe or HDPE with a diameter of DN1000-2000.

[0075] The formula of the surrounding backfill material suitable for flexible pipelines used in this example is:

[0076] Water 326Kg, cement 30Kg, fly ash 370Kg, fine sand 1100Kg, stone powder 150Kg, accelerator 7Kg, water reducer 3.7Kg, water-cement ratio 0.82 (water-cement ratio refers to the water consumption per cubic meter of concrete and all cementitious materials Dosage ratio).

[0077] Wherein, the quick-setting agent used in this example is made of 20.9% CaO, 38.1% SO 3 and 30.5% Al 2 o 3 Composition, the water reducer is a polycarboxylate water reducer.

[0078] Preparation method and backfilling method:

[0079] (1) Filler mixing: Weigh each component according to the amount of each component, mix each component, and stir for 3 to 15 minutes, so that each component is fully mixed and stirred evenly, and the pi...

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Abstract

The invention discloses a pipe periphery backfilling material suitable for a flexible pipeline and a preparation method and a backfilling method of the pipe periphery backfilling material. The pipe periphery backfilling material comprises the following components: 12 wt%-17 wt% of water, 1.2 wt%-1.5 wt% of cement, 14 wt%-19 wt% of fly ash, 53 wt%-57 wt% of fine sand, 6.2 wt%-7.6 wt% of stone powder, 0.4 wt%-0.6 wt% of a setting accelerator and 0.2 wt%-0.7 wt% of a water reducing agent. According to the pipe periphery backfilling material suitable for the flexible pipeline and the preparation method and the backfilling method of the pipe periphery backfilling material, the material does not need layered compaction in the backfilling process, it can be guaranteed that backfilling is dense at the haunch corner of the flexible pipeline, the stability of the overall structure of a flexible drainage pipe under a heavy-load pavement is guaranteed, the problems of pavement collapse, cracking and the like can be solved, the backfilling operation efficiency of the flexible drainage pipe is improved, and the backfilling cost is reduced. The preparation method and the backfilling method are simple and convenient to use.

Description

technical field [0001] The invention relates to the field of engineering materials, in particular to a pipe circumference backfill material suitable for flexible pipelines, a preparation method and a backfill method thereof. Background technique [0002] With global climate change, frequent occurrence of urban waterlogging disasters, and increasing emphasis on urban waterlogging prevention and sewage quality improvement and efficiency enhancement across the country, flexible pipes represented by buried plastic drainage pipes are used in various pipe network renovation projects. be widely used. Compared with traditional concrete drainage pipes, plastic drainage pipes have the advantages of light weight, small water resistance coefficient, corrosion resistance, good airtightness, convenient transportation and installation, and fast construction speed. In recent years, the application proportion of flexible drainage pipes has been increasing due to the construction requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/08E03F3/04E03F3/06
CPCC04B28/04C04B28/08E03F3/04E03F3/06C04B2201/50C04B18/08C04B14/06C04B14/02C04B2103/12C04B2103/302
Inventor 董欢沈浩李英琦苗春李欢欢陈殿军季永兴李彤刘佳颖施大堃蒋炜司鹏飞
Owner SHANGHAI URBAN CONSTR MATERIAL CO LTD
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