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Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment

A technology for dredging sediment and a construction method, applied in the field of environmental engineering, can solve the problems of high production cost and reduced feasibility, and achieve the effects of increasing the contact surface, increasing the drainage rate, and increasing the area of ​​the effective working area.

Inactive Publication Date: 2013-02-13
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the above two methods, due to the use of external electromechanical equipment, the production cost is relatively high, which reduces the feasibility of practical application

Method used

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  • Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment
  • Sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Implement the mud discharge field that the present invention builds, as figure 1 and figure 2 shown. According to the technical scheme of the present invention, it includes: the side slope strengthening drainage layer 2 on the inner slope of the weir around the mud discharge field, the vertical drainage wall 5 arranged in the field, the drainage ditch 3 at the bottom of the side slope and the bottom of the drainage wall, and the drainage ditch The drainage pipe 4 in the middle, and the retreat pool 1 is set below the mud discharge field.

[0024] The specific steps of carrying out the construction of the mud discharge field according to the present invention are as follows: first, according to the design size of the mud discharge field, adopt the mode of layer by layer tamping to carry out the construction of the surrounding weirs around the mud discharge field, and build a retreat on one side of the mud discharge field. Ponds and outlets; construction of a side slop...

Embodiment 2

[0031]A construction method for accelerating the dehydration and solidification of dredged sediment and stabilizing a mud discharge field. The method lays a reinforced drainage layer on the inner slope of the cofferdam around the mud discharge field. A drainage collection pipe is arranged at the bottom of the reinforced drainage layer. The reinforced drainage layer includes laying in sequence The anti-seepage layer, diversion drainage layer and water seepage layer, the drainage collection pipe is placed in the drainage ditch, and gravel is filled around it to form a side slope drainage system. At the same time, a vertical drainage wall drainage system is set in the middle of the mud discharge field. Wooden fixed piles, the vertical drainage wall is composed of supporting skeleton iron mesh, filler seepage bricks and outsourcing seepage geotextile, the drainage collection pipe is set under the drainage wall, the diameter of the pipe is 100mm, and a seepage hole with a diameter of...

Embodiment 3

[0033] A construction method for accelerating the dehydration and solidification of dredged sediment and stabilizing a mud discharge field. The method lays a reinforced drainage layer on the inner slope of the cofferdam around the mud discharge field. A drainage collection pipe is arranged at the bottom of the reinforced drainage layer. The reinforced drainage layer includes laying in sequence The anti-seepage layer, diversion drainage layer and water seepage layer, the drainage collection pipe is placed in the drainage ditch, and gravel is filled around it to form a side slope drainage system. At the same time, a vertical drainage wall drainage system is set in the middle of the mud discharge field. Bamboo fixed piles, the vertical drainage wall is made of bamboo braids as the supporting frame, gravel as the filler, and is covered with water-seeping non-woven fabrics. The drainage collection pipe is installed under the drainage wall. The diameter of the pipe is 250mm, and the d...

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Abstract

The invention relates to a sludge discharge field constructing method for speeding up dehydration, solidification and stabilization of dredged sediment. The method comprises the following steps of: paving a strengthened drainage layer on each inner side slope of a cofferdam around the sludge discharge field, wherein a drainage collecting pipe is arranged at the bottom of each strengthened drainage layer to form a side slope drainage system; and arranging upright drainage walls in the middle of the sludge discharge field, wherein drainage collecting pipes are arranged below the drainage walls to form a drainage wall drainage system, namely the side slope drainage system and the drainage wall drainage system are constructed to speed up the dehydration, solidification and stabilization of the dredged sediment of the sludge discharge field. Compared with the prior art, the upper layer of clear liquid of sludge is discharged through a recession pool, and the water in the sludge is discharged through the side slope drainage system and the drainage wall drainage system, so that the area of the drainage working area is increased, the internal drainage effect of the sludge is improved, the drying process of the sludge in the sludge discharge field is greatly shortened, the time of solidification and stabilization of sediment is shortened, the solidification and stabilization speed of the sediment introduced into the sludge discharge field is improved, the use efficiency of the sludge discharge field is improved, and the occupied area of the sludge discharge field is reduced.

Description

technical field [0001] The invention relates to a construction method of a device in the field of environmental engineering, in particular to a construction method for accelerating the dehydration and solidification of dredged bottom mud and stabilizing a mud discharge field. Background technique [0002] Rivers and lakes are important resources for human survival and development, and their functions are mainly in water supply, flood discharge, shipping, aquaculture, and military defense. However, affected by natural processes and / or human activities, rivers and lakes Sediment and / or pollutants in a lake can gradually build up, causing it to lose some or all of its function. Dredging is the cleaning of sediments on the bottom of rivers and lakes to restore the normal function of the water body. [0003] Traditionally, the main purpose of dredging is to restore the flood discharge and navigation capabilities of rivers and lakes. In recent years, due to human activities inte...

Claims

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Application Information

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IPC IPC(8): E02D3/10
Inventor 何晶晶曹江林邵立明顾伟妹章骅吕凡
Owner TONGJI UNIV
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