An ecological protection structure and dredging method for river bank slopes under adverse geological conditions

Abstract

The present invention provides a river channel dredging method under unfavorable geological conditions and an ecological protection structure for the bank slope of the channel, including upstream cofferdams and downstream cofferdams of the river section to be dredged, support piles on the left bank and the right bank, backfilling blocks on the left bank and the right bank, Backfill graded stone materials at the empty parts under the retaining wall on the left bank and right bank, ecological plant planting beds, ecological plants, and isolation layer backfilled after dredging the river channel. The invention can ensure the stability of the bank slope, improve the local water ecology of the river course, improve the self-purification ability of the river water, prolong the sewage treatment period and reduce the sewage treatment cost.

Description

technical field [0001] The invention relates to an ecological protection structure and dredging method for river bank slopes under adverse geological conditions. It is mainly applicable to when the bank and slope foundation of urban rivers is under adverse geological conditions. By setting up ecological protection structures, the black and odorous bottom mud of the river can be desilted in an environmentally friendly way, and ecological plants can be planted on both sides of the bank to improve the local water ecology and improve the self-purification capacity of the river. Extend the river sewage treatment cycle and reduce the cost of sewage treatment in the later stage. Background technique [0002] Urban rivers are not only channels for flood control and drainage, but also an important part of urban landscape and ecosystem, and an important link to realize the harmony between human and water. With the passage of time and the development of the urban economy in normal urb...

AI Technical Summary

Problems solved by technology

[0005] (2) The foundations of the retaining walls on both sides of the river in the coastal and urban areas along the river are weak. The layer is muddy, and the safety factor of the retaining walls on both sides of the river is low. During the dredging process of the river, under the action of external forces, the bank slopes on both sides of the river are prone to instability, collapse, subsidence and other damages

[0006] (3) The foundation soil of the bank slope at the bottom of the channel and on both sides of the channel is muddy soil. During the drainage and dredging operation, the silt flowing at the foot of the bank slope will take away the soil that acts as a stable anti-slip on the bank slope, causing the river channel to The anti-sliding safety factor of the bank slopes on both sides of the river is reduced, which may easily cause damage such as instability, collapse, and subsidence of the bank slopes on both sides of the river.

[0008] (5) During the mechanical dredging process, the insertion and lifting of the mechanical bucket in the silt or the hydraulic impact of the high-pressure water gun will cause the undulation and fall of the thin silt, and the bank slopes on both sides of the river will be dragged by the impact of silt and mud and negative pressure The action of force may lead to bank slope instability, collapse, subsidence and other damage on both sides of the river.

[0009] All of the above factors may cause bank slope instability, collapse, subsidence and other phenomena on both sides of the river. Because the buildings on both sides of the urban river are densely covered, bank slope collapse may lead to unsafe phenomena such as cracking of the buildings on both sides of the river, which will endanger the safety of people and property. , resulting in large economic losses

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