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A joint method of urban river dredging and shoal-deep pool sequence reconstruction

A shoal and river technology, applied in the field of environmental engineering, to achieve the effect of enhancing hydrodynamics, improving biological activity, and improving self-purification ability

Active Publication Date: 2016-12-07
浙江一清环保工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the present invention provides an urban Combined method of channel dredging and shoal-deep pool sequence reconstruction

Method used

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  • A joint method of urban river dredging and shoal-deep pool sequence reconstruction
  • A joint method of urban river dredging and shoal-deep pool sequence reconstruction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Select a certain urban river with upright embankment and hardening, the river width is 12-15m, the constant water level is 1.5m (the elevation of the river bottom is set to 0m), the transparency is 50-60cm, and the bottom mud thickness is 15-30cm.

[0029] refer to figure 1 , figure 2 A combined method for urban river channel dredging and shoal-deep pool sequence reconstruction, comprising the steps of:

[0030] (1) At the bend of the river, where the embankment protrudes toward the river, the construction area of ​​Shoal 1 is selected, relying on the river bank, the widest part of the construction area of ​​Shoal 1 is designed to be 5m, and the elevation is 1.1m. The shape of the curve is driven into the bottom mud with a slope of 2:1, and the distance between the wooden piles is 1m, and the external frame of the shoal is built; the geotextile is used as the enclosure, and the lower part of the enclosure is filled with heavy objects, placed inside the frame, relying ...

Embodiment 2

[0035] Select a city river course with upright and hardened embankments, the river width is 9-12m, the constant water level is 1.2m (the elevation of the river bottom is set to 0m), the transparency is 30-40cm, and the bottom mud thickness is 20-40cm.

[0036] refer to figure 1 , figure 2 A combined method for urban river channel dredging and shoal-deep pool sequence reconstruction, comprising the steps of:

[0037] (1) At the bend of the river, select the construction area of ​​Shoal 1 on the side where the embankment protrudes toward the river, rely on the river bank, design the widest part of the shoal to be 4m, and the top elevation to be 0.9m. Use 2m-long wooden piles to drive into the bottom mud with a slope of 1:1 according to the shape of the leaf-shaped curve. The distance between the wooden piles is 1m to build the external frame of the shoal; Put it inside the frame, rely on the buoyancy of the enclosure to be attached to the wooden pile, and the upper part is fi...

Embodiment 3

[0042] Select a city river course with upright and hardened embankments, the river width is 8-11m, the constant water level is 1.3m (the elevation of the river bottom is set to 0m), the transparency is 40-60cm, and the bottom mud thickness is 10-25cm.

[0043] refer to figure 1 , figure 2 A combined method for urban river channel dredging and shoal-deep pool sequence reconstruction, comprising the steps of:

[0044] (1) At the bend of the river, select the construction area of ​​Shoal 1 on the side where the embankment protrudes toward the river, rely on the river bank, design the widest part of the top of the shoal to be 3m, and the top elevation to be 0.8m; The shape is driven into the bottom mud with a slope of 2:1, and the distance between wooden piles is 1m. The external frame of the shoal is built; the enclosure is made of geotextiles, and heavy objects are dropped from the lower part of the enclosure, placed inside the frame, and the buoyancy of the enclosure will stick...

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Abstract

The invention relates to a coupling technique of city watercourse dredging and sequence reestablishment from a shoal to a deep pool. The coupling technique of the city watercourse dredging and the sequence reestablishment from the shoal to the deep pool is characterized in that a sequence from the shoal to the deep pool of a river is reestablished on a city watercourse crook portion where a river bank is upright and sclerotic by combining the watercourse dredging with a bottom mud solidification technique. According to the coupling technique of the city watercourse dredging and the sequence reestablishment from the shoal to the deep pool, the shoal can provide appropriate growing environment for submerged plants and aquatic animals, and the submerged plants not only can purify water and inhibit growth of algae, but also can provide good habitat environment for the aquatic animals, and thereby further improves self cleaning capacity of a watercourse; the sequence from the shoal to the deep pool can strengthen hydrodynamic force of the watercourse, improve dissolution oxygen content in a water body, mitigate anoxic status of lower layers of the city watercourse, and improve biological activity of bottom mud, and thereby improves self cleaning capacity of the water body.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and relates to an urban river ecological restoration technology, in particular to a combined method of urban river dredging and shoal-deep pond sequence reconstruction. Background technique [0002] With the development of urbanization, in order to meet the needs of economic development, the shape of urban rivers has been greatly changed, and there are phenomena such as vertical embankment hardening, straightening of rivers, and simplification of river sections. In addition, the single hydrodynamic conditions of urban rivers and long-term high water levels have deprived aquatic organisms of an environment for survival, resulting in a decrease in river biodiversity and weakened self-purification capabilities. The deterioration of urban river water quality and landscape has seriously affected the lives of surrounding residents, and effective governance is urgently needed. [0003] The main...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/02E02B3/18
CPCY02A20/402
Inventor 陈建军任松洁丁庆章
Owner 浙江一清环保工程有限公司
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