Step-type ecological landscape dam suitable for urban rivers and its construction method

A technology for ecological landscapes and dams, applied in dams, water resources protection, embankments, etc., can solve problems such as the inability to meet the needs of sustainable development of rivers, solve ecological environment governance problems, restore connectivity, and reduce upstream silt the effect of

Active Publication Date: 2014-10-08
CHINA THREE GORGES CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the expansion of river functions, the factors to be considered in river regulation have greatly increased, and traditional river regulation can no longer meet the needs of sustainable river development.

Method used

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  • Step-type ecological landscape dam suitable for urban rivers and its construction method
  • Step-type ecological landscape dam suitable for urban rivers and its construction method
  • Step-type ecological landscape dam suitable for urban rivers and its construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0071] Compared with the step-type ecological landscape retaining dam built in Example 2, the backwater in front of the dam is not reduced much, and the backwater in front of the dam is compared as shown in Table 1, which can meet the water storage requirements.

[0072] Table 1: Upstream backwater volume of different types of dams under different inflow conditions (m 3 )

[0073]

Condition 1

Condition 2

Condition 3

Example 1

1291070

2100750

2301700

Example 2

942050

1774350

2000550

[0074] In Embodiment 3 of the present invention, according to the topographic data of the river course in a certain city, the topography on both sides of the river course, the flood peak flow, the design flood level, etc., referring to the design specification of the rubber dam, the dam body construction position is selected, and the width L of the river course at the dam site is determined as 24.3m and the height H of the dam body...

Embodiment 4

[0084] Compared with the step-type ecological landscape retaining dam suitable for urban rivers built in Example 4, the backwater in front of the dam is not reduced much, and the backwater in front of the dam is compared as shown in Table 2, which can meet the water storage requirements.

[0085] Table 2: Upstream backwater volume of different types of dams under different inflow conditions (m 3 )

[0086]

[0087] The numerical simulation results show that the stepped ecological landscape retaining dam described in the above examples 2 and 4 can form a water drop landscape on the one hand under different water inflow conditions, and on the other hand, its energy dissipation effect is relatively low. Excellent, the maximum energy dissipation rate can reach 71%. The opening design of the barrage makes the water depth on both sides of the barrage have a relatively lag step change, which restores the spatial connectivity of the river, which is conducive to the supply o...

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Abstract

The invention relates to a ladder type ecological landscape retaining dam suitable for urban rivers, which comprises a retaining dam body, and the retaining dam body comprises an upstream surface, a downstream surface, a top surface and a bottom surface, wherein the top surface is a horizontal surface, the upstream surface is perpendicular to the top surface, the downstream surface is a ladder type surface comprising first level transition steps connected in sequence along the top surface and at least one standard step; the depth-width ratio of the standard step ranges from 0.6 to 0.7, the height of the transition steps is identical with that of the standard step, the depth-width ratio of the transition steps is two thirds of that of the standard step; the left end of the dam body is in contact with the left bank of the river channel, and an opening with a length 10 % to 15% to the width of the river channel is formed in the right bank of the river channel. The invention further provides a ladder type ecological landscape retaining dam construction method to enhance integral function of a city, promote sustainable development of the city, and improve and maintain better ecological environment of the city.

Description

technical field [0001] The invention relates to the technical field of dam construction, in particular to a stepped ecological landscape dam suitable for urban river courses and a construction method thereof. Background technique [0002] With the development of social economy and the improvement of people's living standards, people's requirements for their living environment are also increasing. Urban rivers play an important role in maintaining urban ecological environment, and the quality of river water environment affects the quality of urban environment. Traditional river remediation mainly focuses on flood prevention and drainage, but often ignores the biological environmental functions of the river itself, including the passage of sediment, habitat environmental functions, environmental purification, maintaining the structure and process of natural ecosystems, etc. Landscape issues. [0003] In urban river regulation, rubber dams, sluice dams and other blocking stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/10
CPCY02A20/402
Inventor 戴会超张鸿清楼益龙柯云
Owner CHINA THREE GORGES CORPORATION
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