CN101713178B - Method for creating three-stage flow passage of meandering riverway in lower Yellow River - Google Patents

Abstract

The invention relates to a method for creating a three-stage flow passage of a meandering riverway in the lower Yellow River, of which the International Patent Classification (IPC) is E02B1/00 and E02B3/02. The method comprises the following steps of: constructing a control-guide engineering dam which comprises spur dikes made of waterproof earth-rock dams according to the radius of a river bend at the outermost side of a main design riverway; constructing a submerged dam at the chuting section at the tail part of the control-guide engineering dam, wherein the crest elevation is equal to the regulated-flow water level, and the top of the submerged dam is provided with a scour prevention facility; and distributing permeable pile dam at the two sides in a medium-size channel of a straight river section between two bends, wherein the crest elevation of the pile dam is the same as the water level with the local flow of 800m3/s. The three-stage flow passage created by the method can control the river pattern flow passages in different states of the small-size flow passage, medium-size flow passage and flood period, realize the river stability, enhance the capabilities of releasing flood and transferring sands in the riverway, and prevent the Yellow River levee from avulsion, breakdown and other dangerous situations, thereby achieving the goal of the comprehensive treatment of the riverway in the lower Yellow River.

Description

Method for creating three-stage flow passage of meandering riverway in lower Yellow River

Technical field:

The present invention relates to the method for river regulation, its IPC international Patent classificating number is E02B 1/00 and E02B3/02, and particularly a kind of braided channel, downstream, the Yellow River that the braided reache river gesture scope of going around is control effectively is renovated three grades of stream shaping methodses and moulded the dam.

Background technology:

The dredging waterway scheme in downstream, the Yellow River is to form gradually in the practice process of dredging waterway, and what adopt at present is little curved renovation scheme.This scheme is according to river gesture development law, plans as a whole the requirement of each department of national economy, chooses a kind of basic stream as the regulation stream; Concave bank in the bend section is built training works, the control lead the river potential barrier to.This scheme is because crooked amplitude significantly reduces than the bendability river course, and it is little curved that the river course is, so claim " little curved renovation scheme ".

To little curved renovation scheme, carried out a large amount of prototype measurements, analysis and river model test for many years, the research basis is comparatively sturdy, and theory is ripe relatively, and the regulation experience is than horn of plenty.In the long term studies process, progressively formed " flood control is main, makes overall plans; the regulation of middle water; withered the taking into account of flood, protect with the dam curved, with curved water conservancy diversion; initiatively layout; actively perfect, Liu Shiwei master, exploitation green wood " regulation principle and thinking, and, the perfect relatively regulation parameter determination method of a cover has been proposed in conjunction with the actual boundary condition of downstream, the Yellow River braided reache and the husky process of water.

By carrying out dredging waterway in the downstream, the Yellow River, the braided reache river gesture scope of going around is effectively controlled, and current are improved, and have improved flood control safety, and the fraction that draws yellow water intaking has been improved in the beach that prevented from effectively to collapse, the village of collapsing.Building of river training works created huge economic benefit and social benefit.But, also there is certain deficiency in little curved dredging waterway scheme, because river training works is by the thinking of " middle water regulation " design, engineering is laid near the middle current road compliance of the flow regulation flow better, but for flow less little water or great flood, also there is certain inadaptability in existing engineering; Particularly after the Xiaolangdi Dam Project utilization, downstream river course has 300 days time all to be in 400～800m every year approximately ³The little water process of/s, the little water duration increases greatly, engineering is more obvious to the performance of the inadaptability of little water, and outstanding behaviours increases in lopsided river bend, engineering changes than greatly or take off the river and lose effect is led in the control of river gesture by slipping the position, and the deformity river is bent totally unfavorable to the flood control in downstream, the Yellow River during little water.Can realize the combination of poised river gesture and flood control safety, regime channel combines with improving transportability of sediments, realizes the long-term stability of the Yellow River.

Summary of the invention:

The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of on existing little curved dredging waterway scheme basis, replenish perfect to the river training works of laying, make its not only can adapt in the current road, potential barrier road, river in the time of also can adapting to little water and great flood, build three grades of streams gradually, the braided channel, downstream, the Yellow River that reaches the purpose of control potential barrier road, river, enhancing flood control safety is renovated three grades of stream shaping methodses and is moulded the dam.

As follows for realizing the technical scheme that purpose of the present invention takes:

Regulation three grades of stream shaping methodses in braided channel, downstream, a kind of the Yellow River is characterized in that:

(1), build the river control works dam, the river control works dam be to form the groynes group by fluid-tight earth and rockfill dam according to turning radius, and crest elevation is renovated the flow water level and added the 1m superelevation for designing in design main stem outermost;

(2), send at river control works dam afterbody and to slip shed repair and build the ground sills that can flood, crest elevation equals to renovate the flow water level, the ground sills dam crest is provided with the erosion control facility;

(3), in the Zhong Shui riverbed of straight section both sides between two bends, lay pervious dike, stake dam crest elevation and local 800m ³Water level during/s flow is identical.

(4), at flow 800m ³During the following little water of/s, the main flow constraint is controlled in the scope on weep road, groove width 500m is beneficial to form narrow relatively dark low flow channel; Regulation flow 4000m is taking place ³During middle Chang Hongshui about/s, the river control works that is formed by the groynes group and sending slips a section ground sills and plays a role, and in the scope of current road, groove width 800～1000m was beneficial to the stable Zhong Shui riverbed that comprises low flow channel during main flow was controlled at; When great flood takes place, effect is led in the river control works performance control that is formed by the groynes group, and ground sills that it is first down and permeable spur be overcurrent all, and most of current are constrained in the riverbed between the river control works of two sides, wide 2000～the 2500m in flood passage riverbed is to stablize river gesture flood period.

The dredging waterway dam that downstream, a kind of the Yellow River three grades of streams of braided reache are moulded, it is characterized in that: build the river control works dam in the river course outermost, the river control works dam is to form the groynes group by fluid-tight earth and rockfill dam according to certain turning radius, and crest elevation adds the 1m superelevation for design regulation flow water level when great flood takes place; River control works dam afterbody is built the ground sills that can flood, and crest elevation is that regulation flow 4000m is taking place ³The height of regulation flow water level during the middle Chang Hongshui of/s; Pervious dike is laid in both sides in the Zhong Shui riverbed of the straight section between two bends, stake dam crest elevation and local 800m ³Water level during/s is identical.

At flow 800m ³During the following little water of/s, river gesture main flow is restrained to be controlled in the scope on weep road, and groove width 500m forms narrow relatively dark low flow channel gradually; Regulation flow 4000m is taking place ³During the middle Chang Hongshui of/s, the river training works and the first down ground sills thereof that are formed by the groynes group play a role, and in the scope on current road, groove width 800-1000m formed the Zhong Shui riverbed that comprises low flow channel gradually during river gesture main flow was controlled in; When great flood takes place, effect is led in the river training works performance control that is formed by the groynes group, and ground sills that it is first down and permeable spur be overcurrent all, and most of current are constrained in the riverbed between the river control works of two sides, about groove width 2000m, form stable flood channel gradually.

The present invention has following advantage: three grades of streams that utilize this technology to build can satisfy control potential barrier road, river under weep road, middle current road, flood period different conditions; transportability of sediments drains off floodwaters for realization poised river gesture, enhancing river course; the generation of great dangerous situation such as prevent that Dike Along Lower Yellow River from bursting, bursting; reach the target of the Yellow River downstream channel comprehensive regulation, stable crucial meaning arranged what guarantee the Yellow River and Huai He River sea plain and even the Chinese nation.

Description of drawings:

Fig. 1 is existing little curved renovation scheme schematic diagram.

Fig. 2 is three grades of stream schematic diagrames of the present invention.

The specific embodiment:

As shown in Figure 1, 2, build the river control works dam in the river course outermost, the river control works dam is to form the groynes group by fluid-tight earth and rockfill dam according to turning radius, and crest elevation adds the 1m superelevation for design regulation flow water level.Send the slide shed repair to build the ground sills that can flood at river control works dam afterbody, crest elevation equals to renovate the flow water level.Pervious dike is laid in both sides in the Zhong Shui riverbed of straight section between two bends, stake dam crest elevation and local 800m ³Water level during/s flow is identical.

After the construction of above-mentioned river training works plane figure is finished, at flow 800m ³During the following little water of/s, all river training works all can be brought into play control and lead effect, and river gesture main flow is restrained to be controlled in the scope on weep road, about groove width 500m, forms narrow relatively dark low flow channel gradually; Regulation flow (4000m is taking place ³During near/ middle Chang Hongshui s), river training works that forms by the groynes group and the first down main effect of ground sills performance thereof, during river gesture main flow is controlled in the scope on current road, groove width 800～1000m, formation comprises the Zhong Shui riverbed of low flow channel gradually; When great flood takes place, effect is led in the river training works performance control that is formed by the groynes group, and ground sills that it is first down and permeable spur be overcurrent all, and most of current are constrained in the riverbed between the river control works of two sides (big flood stream), about groove width 2000m, form stable flood channel gradually.

Claims (1)

1. method for creating three-stage flow passage of meandering riverway in lower Yellow River is characterized in that:

(1), build the river control works dam, the river control works dam be the groynes group who is made up of according to turning radius fluid-tight earth and rockfill dam, and crest elevation is renovated the flow water level and added the 1m superelevation for designing in design main stem outermost;

(2), send at river control works dam afterbody and to slip shed repair and build the ground sills that can flood, crest elevation equals to renovate the flow water level, the ground sills dam crest is provided with the erosion control facility;

(3), in the Zhong Shui riverbed of straight section both sides between two bends, lay pervious dike, stake dam crest elevation and local 800m ³Water level during/s flow is identical.

(4), at flow 800m ³During the following little water of/s, the main flow constraint is controlled in the scope on weep road, groove width 500m is beneficial to form narrow relatively dark low flow channel; Regulation flow 4000m is taking place ³During middle Chang Hongshui about/s, the river control works that is formed by the groynes group and sending slips a section ground sills and plays a role, and in the scope of current road, groove width 800～1000m was beneficial to the stable Zhong Shui riverbed that comprises low flow channel during main flow was controlled at; When great flood takes place, effect is led in the river control works performance control that is formed by the groynes group, and ground sills that it is first down and permeable spur be overcurrent all, and most of current are constrained in the riverbed between the river control works of two sides, wide 2000～the 2500m in flood passage riverbed is to stablize river gesture flood period.

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