Coupling technique of city watercourse dredging and sequence reestablishment from shoal to deep pool
A combined technology and shoal technology, applied in the field of environmental engineering to achieve the effects of increasing dissolved oxygen content, enhancing hydrodynamics, and improving biological activity
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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 technology of urban river channel dredging and shoal-deep pool sequence reconstruction, comprising the following steps:
[0030] (1) At the bend of the river, the embankment protrudes toward the river, select the construction area of Shoal 1, rely on the river bank, design the widest part of the construction area of Shoal 1 to be 5m, the elevation is 1.1m, and use 2.5m long wooden piles according to the leaf shape 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 ...
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 technology of urban river channel dredging and shoal-deep pool sequence reconstruction, comprising the following steps:
[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 uppe...
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 technology of urban river channel dredging and shoal-deep pool sequence reconstruction, comprising the following steps:
[0044] (1) At the bend of the river, the side of the embankment protruding toward the river is selected as the construction area of Shoal 1, relying on the river bank, the widest part of the top of the shoal is designed to be 3m, and the elevation of the top is 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...
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