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External-packing filter materials of dewatering closed conduit, and preparing and using methods

A filter material and hidden pipe technology, applied in separation methods, soil drainage, chemical instruments and methods, etc., can solve the problems of easy corruption of organic filter materials, affecting drainage effects, and short service life, so as to prevent soil particles from clogging filter materials and concealed pipes, improve the drainage and salt discharge effect of concealed pipes, and reduce the laying cost

Active Publication Date: 2012-08-22
TIANJIN TEDA GREEN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, organic materials such as straw, rice husk, wheat straw, sawdust, palm skin, etc. have appeared as outsourcing filter materials for underground drainage. Although the cost is saved, the organic filter material is easy to be corrupted, has a short service life, and is easy to drain. Cause the drainage holes to be blocked, thus affecting the drainage effect, which is still not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Investigate the soil at the buried depth of the underground pipe drainage project construction site, and analyze its particle size composition. For example, in terms of weight percentage, the sand content is 23.6%, the silt content is 39.5%, and the clay content is 36.9%. The texture is clay loam ; Clay content of more than 30%, for the stability of the soil.

[0021] 2. Use a permeameter to analyze and test the permeability coefficient of the calcium-increasing liquid slag to be used, and it is 0.46cm / s, which meets the requirements. Under the same permeability coefficient, compared with the traditional sand and gravel filter material, the use of calcium-enriched liquid slag as the outsourcing filter material saves more than 20% of the laying cost per unit pipe length.

[0022] 3. Prepare calcium-increasing liquid slag outsourcing filter material: choose a vibrating sieving machine with a sieve diameter of 38mm. According to the technical indicators of the sieving m...

Embodiment 2

[0026] 1. Investigate the soil at the buried depth of the underground pipe in the construction site of the underground pipe drainage project, and analyze its particle size composition. For example, in terms of weight percentage, the sand content is 53.2%, the silt content is 41.3%, and the clay content is 5.5%. The texture is sandy Loam soil; clay content below 30% is unstable soil.

[0027] 2. Use a permeameter to analyze and test the permeability coefficient of the calcium-increasing liquid slag to be used. It is between 0.43-0.56cm / s and can be used as an outsourcing filter material for underground drainage.

[0028] 3. Prepare calcium-increasing liquid slag outsourcing filter material:

[0029] (1) Select a double-deck vibrating sieving machine, the aperture of the upper sieve is 38mm, and the aperture of the lower sieve is 19mm; according to the technical indicators of the sieving machine, place about 200Kg of calcium-enriched liquid slag raw materials on a 38mm sampling ...

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Abstract

The invention provides external-packing filter materials of a dewatering closed conduit and preparing and using methods, wherein calcium-adding liquid slag is made as raw material; and different apertures of the external-packing filter materials are manufactured respectively directly at soil with 30% or more or less of clay particles (weight percentage). Preparing and using methods for filter materials are also provided. According to the invention, industrial solid waste calcium-adding liquid slag is completely utilized so as to change waste material into things of value; in addition, the soil around a closed conduit can be effectively kept at a stable state, soil particles are prevented from blocking the filter materials and the closed conduit, permeation systems around the closed conduit are improved, and dewatering and salt-elimination effect of the closed conduit is improved.

Description

technical field [0001] The invention belongs to the technical field of underground drainage, and in particular relates to an outsourcing filter material for underground drainage and its preparation and use methods. Background technique [0002] The underground pipe drainage technology is an important technical measure for the prevention and control of farmland waterlogging and saline-alkali land, and is widely used at home and abroad. The outsourcing filter material of the drainage hidden pipe is a material with strong water permeability wrapped around the dark pipe. Its main function is to maintain the stability of the soil around the dark pipe, prevent soil particles from blocking the dark pipe, improve the hydraulic performance around the dark pipe, and improve the drainage efficiency and Sustained effectiveness of drainage. In recent years, what kind of material to use as the outsourcing filter material has been a research hotspot. [0003] At present, various graded g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/06E02B11/00
Inventor 张清张金龙王振宇
Owner TIANJIN TEDA GREEN GRP CO LTD
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