Large-gradient gravel river bank protective structure and river washout-resistant controlling method thereof

Abstract

The invention relates to a large-gradient gravel river bank protective structure and a river washout-resistant controlling method thereof. The river washout-resistant controlling method comprises the following steps of: determining a river width based on a planned line shape according to the river characteristics; determining a bank protective form according to a flood control standard; determining apron burial depth and laying width according to flow quantity and riverbed composition; designing the dimension of the bank protective structure according to the property and the height of filling soil; then excavating the riverbed along a vertical direction and a horizontal direction together; then respectively constructing vertical bank protective structures at both sides of the riverbed; also arranging presetting holes on the vertical bank protective structures; constructing aprons along the horizontal direction on both ends of the bottom of the riverbed, wherein one ends of the aprons are inserted into and fixedly connected with the presetting holes of the vertical bank protective structures positioned at corresponding sides; finally backfilling to the height of an original riverway on the aprons, and backfilling to preset height at both sides of the bank protective structure. The invention achieves the effects of basic balance of riverbed siltation erosion and fast flood discharge, plays a submission role on water flows, not only reduces the impact force of the water flows on a river levee, but also enables silt to be taken away by the water flows, thereby preventing river sand from blocking the riverway due to sedimentation.

Description

technical field [0001] The invention relates to a large gradient seasonal pebble and gravel river bank protection structure and a river anti-scouring dredging control method, belonging to the field of river channel dredging control water conservancy projects. Background technique [0002] With the economic and social development of the river basin, especially in the process of western development, the importance of water transportation cannot be ignored. So far, water transport is still the most economical and environmentally friendly mode of transportation. Especially in the central and western regions of China, the cost of railway and road transportation is high, and there is the golden waterway of the Yangtze River, so the development of the upper reaches of the Yangtze River has received more and more attention from the government. [0003] However, most of the rivers in the upper reaches of the Yangtze River have the characteristics of mountainous rivers, such as large...

AI Technical Summary

Problems solved by technology

This treatment method also has the following deficiencies: 1) Since the long embankment is artificially built temporarily, it is built along the original slope of the river, usually in an inclined inverted splayed shape, which makes the width of the river change greatly, and in some places It is easy to cause river sand to accumulate and the river bed to be blocked; 2) In the case of seasonal floods with a large amount of pebbles, the lower end of the river bed is relatively narrow, and the impact is more serious, and the long-term scouring makes the river on both sides The embankment is prone to collapse; 3) The soft subsidence is used as the anti-scouring component at the bottom, which can fluctuate with the movement of the water flow when the water flow is not too large, reducing the impact of the water flow on the bottom of the river bed, thereby alleviating to a certain extent The hollowing effect of the water flow on the bottom of the river bed, but because the soft sink is connected by many small components, which are interlockingly connected with each other, in the river with a large gradient, the impact force of the water exceeds the soft sink. The pulling force between the rows, after a period of scouring, the soft sinking row is likely to be destroyed, and will impact downstream with the river water, causing greater hidden dangers

At present, there is no effective treatment method specifically for large-scale gravel rivers, which is also an urgent problem to be solved by the water conservancy department.

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