Swell-shrink type drainage device and sludge positive and negative pressure drainage method

A drainage device, positive and negative pressure technology, applied in soil protection, construction, infrastructure engineering and other directions, can solve the problems of small rebound amount of straw, limited cracks, and can not well overcome silt consolidation and blockage. The effect of reducing residual water, improving drainage efficiency, increasing air permeability and water permeability

Active Publication Date: 2017-03-22
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for shallow reinforcement of silt. When dealing with deep silt, due to the high pressure deep in the silt, the straw cannot rebound under greater pressure. In addition, the rebound of straw is small, so the straw The cracks produced by the rebound are also limited, which cannot well overcome the problem of silt consolidation and silting

Method used

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  • Swell-shrink type drainage device and sludge positive and negative pressure drainage method
  • Swell-shrink type drainage device and sludge positive and negative pressure drainage method
  • Swell-shrink type drainage device and sludge positive and negative pressure drainage method

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Embodiment 1

[0038] Please refer to figure 1 and figure 2As shown, this embodiment provides an expansion-contractable drainage device 001, which includes a drainage core 100 and a permeable filter cloth 200 wrapped on the drainage core 100. There is at least one radiating drainage portion 120 on the outer wall of the pipe body 110 , and at least one drainage channel 111 running through both ends of the drainage pipe body 110 is provided in the drainage pipe body 110 . Specifically, the drain pipe body 110 is cylindrical, and four drain channels 111 are arranged inside the drain pipe body 110, and each drain channel 111 runs through both ends of the drain pipe body 110. There are 8 strip-shaped radiation drains 120 , the distance between the edge of the radiation drain 120 away from the drain pipe body 110 and the outer wall of the drain pipe body 110 is equal to the radius of the drain pipe body 110 .

[0039] The expansion-contraction drainage device 001 can effectively prevent the slu...

Embodiment 2

[0045] like image 3 and Figure 4 As shown, the present embodiment provides a positive and negative pressure drainage method for sludge, which comprises the following steps:

[0046] S201 , prepare the expansion-contraction drainage device 001 provided in Example 1, and wrap the permeable filter cloth 200 on the prepared drainage core 100 to obtain the expansion-contraction drainage device 001 .

[0047] S202. Build a construction floating body on the accumulated silt, and then lay a layer of geotextile 300 on the surface of the silt with the help of the construction floating body, and insert the prepared expansion-contraction drainage device 001 through the geotextile 300 at intervals into the silt; specifically, Each expansion-contraction drainage device 001 is vertically inserted into the mud according to the vertical and horizontal intervals, the distance between the expansion-contraction drainage devices 001 arranged in the longitudinal direction is 3m, and the distance...

Embodiment 3

[0054] like image 3 and Figure 4 As shown, the present embodiment provides a positive and negative pressure drainage method for sludge, which comprises the following steps:

[0055] S301 , prepare the expansion-contraction drainage device 001 provided in Example 1, and wrap the permeable filter cloth 200 on the prepared drainage core 100 to obtain the expansion-contraction drainage device 001 .

[0056] S302. Build a construction floating body on the accumulated silt, and then lay two layers of geotextiles 300 on the surface of the silt with the help of the construction floating body, and insert the prepared expansion-contraction drainage device 001 through the geotextile 300 at intervals into the silt; specifically, Each expansion-contraction drainage device 001 is vertically inserted into the mud according to the vertical and horizontal intervals, the distance between the expansion-contraction drainage devices 001 arranged in the longitudinal direction is 4m, and the dist...

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Abstract

The invention provides a swell-shrink type drainage device and a sludge positive and negative pressure drainage method, and belongs to the field of foundation processing. The swell-shrink type drainage device comprises a drainage core body and a piece of water-permeable filter cloth wrapped on the drainage core body. The drainage core body comprises a drainage pipe body and at least one radiation drainage part arranged on the outer wall of the drainage pipe body in a protruding manner. At least one drainage channel penetrating the two ends of the drainage pipe body is arranged in the drainage pipe body. The swell-shrink type drainage device can shrink and swell during deflation processing and inflation processing, the consolidated sludge is made to crack, and the drainage capacity and the drainage efficiency of the sludge are improved. The invention further provides the sludge positive and negative pressure drainage method. According to the method, the consolidated sludge attached to the surface of the swell-shrink type drainage device is made to crack by alternately conducting deflation processing and inflation processing, the gas permeability and the water permeability of a consolidated sludge layer are increased, and the drainage efficiency is improved.

Description

technical field [0001] The invention relates to the field of foundation treatment, in particular to an expansion-contraction drainage device and a positive and negative pressure drainage method for sludge. Background technique [0002] Projects such as land reclamation and tidal flat development in coastal areas require a large amount of sediment mixture. The main sources of these sediment mixtures are river and lake dredging silt and dredging silt for construction projects of ports and waterways. It is obtained by means of high moisture content, large clay content, and poor drainage performance. Practice shows that under natural air-drying and consolidation conditions, it takes 3-5 years or even longer for these dredged silts to drain water and resume use, which not only reduces In order to improve the utilization rate of dredged silt, it also needs to occupy a large amount of land for stacking. [0003] In order to improve the utilization rate of dredged silt, it needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/10
CPCE02D3/103E02D2250/0053
Inventor 徐桂中邱成春曹玉鹏王圣萍孙浩
Owner YANCHENG INST OF TECH
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