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Method for dredging silt and harnessing river

A technology for dredging and dredging rivers, applied in the fields of environmental protection and water conservancy engineering

Inactive Publication Date: 2011-06-29
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no method has been found to solve river dredging, sediment accumulation and artificial island construction by using the method of setting nose dams and inserting hard-shell sheet piles at the upstream end, using natural energy to make the best use of the situation, and pushing the boat along the water

Method used

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  • Method for dredging silt and harnessing river
  • Method for dredging silt and harnessing river
  • Method for dredging silt and harnessing river

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: In the Qiantang River, there is a section of river with different widths. Due to the inconsistency of the width and depth of the current, a slow flow area is formed, and the sediment is deposited continuously to form an alluvial island. Alluvial islands are composed of sediment and have a loose structure, so they are very unstable in outline. Whenever there is a flood, the strong erosion will change the shape of the surrounding alluvial island. Under normal circumstances, on both sides of the alluvial island parallel to the river and the tidal current, under the influence of the geostrophic force, one side is always eroded, and the other side is gradually silted up. Over time, long strip islands parallel to the two banks are formed; At both ends, the upstream continues to shrink, and the downstream gradually increases. However, sometimes the entire island is washed away; sometimes the island is close to the mainland and finally joined together. The river is...

Embodiment 2

[0025] Embodiment 2 is a certain SY state (7) of the Yangtze River section (6), such as figure 2 As shown, first, a sunken ship is made in the upper reaches of the widening section of the river according to the shape of the nose embankment, and the bottom of the sunken ship is pre-buried with an explosive sinking device, and the sunken ship is pulled to the middle of the widening section of the river with a tugboat, and then lowered after accurate positioning. sink and fix to form a nose embankment, then use hard-shell sheet piles along both sides of the nose to gradually extend downstream according to the shape of the sand ridge, use a vibratory hammer to drive the sheet piles to form a river surface of equal width, and then insert a hard-shell sheet pile (4 ), the sheet piles are connected to each other, and the dredged soil is placed in the enclosing range of the hard shell sheet piles, gradually forming an artificial island. When the hard shell sheet piles (4) are inserted...

Embodiment 3

[0026] Embodiment 3 DT Zhou (10) of Fuchun section (9) in the upper reaches of Qiantang River, as image 3 As shown, first, two hard-shell sheet piles are inserted in the upstream of the gradually widening section of the river according to the shape of the nose dam, and steel bars are used to connect between the sheet piles, and underwater non-dispersible concrete is poured to form the nose dam. Then along both sides of the nose, hard-shell sheet piles are used to gradually extend downstream according to the shape of the sand ridge, and vibratory hammers are used to drive the sheet piles to form a river surface of equal width, and then a hard-shell sheet pile is inserted, and the sheet piles are connected to each other. A spiral-shaped man-made bend (11) is made in the downstream of the narrowing section of the river course, the river surface widens suddenly, the flow velocity drops, and the mud and sand are deposited to form a fixed sand mining point (12). Put the dredged soi...

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Abstract

The invention relates to a method for dredging and management, which belongs to the techniques of environment protection and hydraulic engineering. The method comprises the following steps of: protecting dikes along both shores of a river by a light and hard shell dike method; arranging a nose dike in the middle position of the gradually-wide section of the river along the upstream end of a longitudinally ridged sand sill; according to the shape of the sand sill, hard shell sheet piles gradually extending to the downstream along both sides of the nose dike to form an aequilate river surface; inserting sheet piles, connecting the sheet piles into a whole, throwing the dredged mud into a range surrounded by the hard shell sheet piles, and then gradually forming a man-made island; marking a helix-shaped man-made bay on the downstream of the gradually-narrow section of the river to form a fixing sand point on the sudden-widen river; and then planting and fixing sand on the man-made island. The invention aims to satisfy the functions of flood discharge, tide suppressing, irrigation, water storage and navigation, and also can establish stable man-made islands and marsh parks. The invention has the advantages of dike stabilization, reduction of sand accretion, utilization of natural energy, and increase of earth resources, and is suitable for various types of river management.

Description

technical field [0001] The invention relates to a river dredging treatment method, which belongs to the technology of environmental protection and water conservancy engineering. Background technique [0002] There are many kinds of rivers distributed all over the world. Generally, those that enter the sea all the year round are called rivers, and those that do not enter the sea are called rivers. Water is the primary condition for human survival and development. People live along the river and gather together by water, gradually becoming densely populated and prosperous cities, such as the Yangtze River Delta and the Pearl River Delta. In this world, floods are not disasters at all, but they become disasters because people are submerged. There are 100 million people in China living in flood discharge areas that should be reserved for floods. When the water rises, it will naturally become a disaster. Rivers bring many conveniences to people, but also some disasters. With th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/02
Inventor 陶松垒郑伟陶钧炳华健晓蒋金良应林江苑媛
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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