Positive and negative pressure enhanced drainage shaft structure for precipitation of landfill site and construction method

A landfill, positive and negative pressure technology, applied in infrastructure engineering, construction, etc., can solve problems such as poor pumping effect of pumping shafts, and achieve the effect of reasonable structure, good air tightness, and air tightness assurance

Inactive Publication Date: 2018-05-22
HANGZHOU ENVIRONMENTAL GROUP +1
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the poor drainage effect of traditional leachate drainage shafts, the present invention provides an enhanced drainage shaft that utilizes the high negative

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Positive and negative pressure enhanced drainage shaft structure for precipitation of landfill site and construction method
  • Positive and negative pressure enhanced drainage shaft structure for precipitation of landfill site and construction method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0031] Such as figure 1 , 2 As shown, the upper section of the positive and negative pressure intensified extraction shaft well pipe of the present invention is a galvanized steel pipe 1 with no perforation, which is used as a negative pressure suction sealing section, and is filled with a mass fraction of 5%-20 % Bentonite compacted clay 5; the middle section is an open-hole galvanized steel pipe 2 used as the inflow section of the leachate; the lower section is a non-opened galvanized steel pipe used as the grit section; the bottom is blocked; the top of the well pipe is blocked The flange blind plate 19 is sealed; the middle and lower sections of the well pipe are filled with anti-filter materials between the galvanized steel pipes and the surrounding garbage pile 12, the anti-filter materials are: geotechnical drainage net 6, 25-40mm hard broken ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a positive and negative pressure enhanced drainage shaft structure for precipitation of a landfill site and construction method. The shaft pipe structure comprises a negative pressure suction seal section with the upper section not provided with holes, a percolating liquid inlet section with the middle section provided with holes and a sand settling section with the lower section not provided with holes. The material of the shaft pipe is galvanized steel pipe, and has good corrosion resistance and deformation resistance. The construction of the shaft is completed by digging a hole, laying down a shaft pipe and a steel reinforcing cage, filling and sealing and filtering a material, installing a pumping pipe and pumping / injection gas pipeline, sealing a head of theshaft, washing the shaft and the like. When the shaft is pumped by a submersible pump, the negative pressure pumping is carried out simultaneously. The percolation gradient of the percolation fluid isincreased by the high negative pressure in the shaft. At the same time, the block effect of the landfill gas on the percolation of the percolation fluid is weakened so as to improve the working performance of the shaft. Silt is produced after a period of operation, and the shaft can dredge the sieve hole by injecting positive pressure gas into the shaft to recover the drainage performance.

Description

technical field [0001] The invention relates to the field of leachate water level control in landfill sites, in particular to a positive and negative pressure enhanced pumping and drainage shaft structure and construction method for dewatering in a landfill site. Background technique [0002] During the operation of the landfill, a large amount of leachate will be produced due to the infiltration of rainfall and the degradation of the landfill itself. Compared with low food waste in developed countries such as Europe and the United States, my country's high food waste has a high leachate yield (51%) due to high initial moisture content (40-60%) and high food waste content (61.6%). On the basis of the large daily landfill volume (5000-10000 tons / day), landfilling waste will produce a large amount of leachate (2500-5000 tons / day). Due to the low permeability coefficient of the waste at the bottom and the blockage of the drainage layer, a large amount of leachate produced cann...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E02D19/10
CPCE02D19/10
Inventor 张海华唐素琴兰吉武徐晓兵黄耆馨胡杰柯瀚白龙叶剑黄知广袁璐韫
Owner HANGZHOU ENVIRONMENTAL GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap