WO2020243974A1

WO2020243974A1 - Method for achieving unidirectional flow of beheaded river by using tides, and device therefor

Info

Publication number: WO2020243974A1
Application number: PCT/CN2019/090445
Authority: WO
Inventors: 赵华菁; 史培新; 刘维
Original assignee: 苏州大学
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-12-10

Abstract

A method for achieving the unidirectional flow of a beheaded river by using tides, and a device therefor; a water-blocking wall (5) is disposed within a beheaded river (2), one end of the water-blocking wall (5) is located at the junction between the beheaded river (2) and a main tidal channel (1), and an interval is present between the other end of the water-blocking wall (5) and the end of the beheaded river (2), the interval being 1/3 to 2/3 of the channel width of the beheaded river (2); thus, the beheaded river (2) is separated into a water intake channel and a water discharge channel that communicate at the end of the beheaded river (2); a one-way water intake gate (3) is disposed between the water intake channel and the main tidal channel (1), and a one-way water discharge gate (4) is disposed between the water discharge channel and the main tidal channel (1); the opening or closing of the one-way water intake gate (3) and the one-way water discharge gate (4) are automatically controlled according to tidal information of the main tidal channel (1) in combination with water level detection on the water intake channel, the water discharge channel and the main tidal channel (1). The water-blocking wall (5) and the two one-way gates are used to convert the fluctuating reciprocating flow of the beheaded river (2) into unidirectional circulating flow by virtue of a tidal hydrodynamic force, and update water volume to be directly proportional to tidal range and the water area of the beheaded river (2).

Description

Method and device for realizing unidirectional flow of Duantou River by using tide

Technical field

The invention relates to a device for treating river water environment, in particular to a device for realizing unidirectional flow of a broken river by using tides, and belongs to the field of water conservancy.

Background technique

The task of harnessing the water environment of urban and rural rivers is very arduous. One of the most important harnessing measures is to connect the Duotou River to achieve smooth flow of water. At present, the methods of connecting the running water by the Duantou River mainly include the following. One is to open the river to connect, and to open the river between the Duantou River and other Duantou rivers (or other main rivers); Laying pipelines between other Duantou rivers (or other main rivers) and constructing pumping stations to achieve connectivity (see literature: Cheng Ying, Zhou Yulin, Application and analysis of pipe jacking technology in the Duantoubang opening project, [J] Water Science and Technology and Economics, 2013, Issue 04); the third is water injection at the pumping station. The inlet of the water diversion pump station is placed upstream of the intersection of the Duantou River and the main river, and the outlet is placed at the end of the Duantou River, compulsorily changing the Dead water state; fourth is the topological diversion wall. The Chinese utility model patent (CN205804274U) changes the topological relationship between the main river channel and the guillotine river on its side, so that the water flows on the topological structure of a through line, which plays a role in guiding the water flow effect.

Among the above methods: some methods involve a large amount of demolition and requisition of land, which are difficult to implement and large construction investment; some methods have disadvantages such as high operation and maintenance costs and poor connectivity; topological diversion walls are not suitable for main rivers and stub rivers If there is a large disparity, otherwise it will reduce the drainage and navigation functions of the main river. In the river courses in the southeast coastal areas of my country, the tidal effect is obvious, which generally fluctuates twice a day. The use of tides to control the flow pattern of the guillotine river has not been reported.

Summary of the invention

technical problem

The solution to the problem

Technical solutions

Aiming at the problems of high implementation difficulty, large construction investment, high operation and maintenance cost, poor connection effect and the like existing in the existing connection management of the guillotine river, the invention provides a method and device for realizing the unidirectional flow of the guillotine river by using tides.

The technical solution for achieving the objective of the present invention is to provide a method for realizing unidirectional flow of the Broken River by using tides, which includes the following steps:

(1) A partition wall is installed in the Duantou River. One end of the partition wall is located at the junction of the Duantou River and the main tidal channel. There is a gap between the other end of the partition wall and the end of the Duantou River. 1/3 to 2/3 of the width of the channel of the Duantou River, thus dividing the Duantou River into the inlet and outlet channels connected at the end of the Duantou River;

(2) Set up a one-way water inlet door between the water inlet channel and the main tidal channel, and set up a one-way water outlet door between the water outlet channel and the main tidal channel;

(3) According to the tidal information of the main tidal channel, the following methods are used to automatically control the opening or closing of the water inlet one-way door and the water outlet one-way door:

Set the highest set water level of the Duantou River. When the tide is high, detect the current water level of the inlet channel and the current water level of the main tidal channel. When the current water level of the main tidal channel is higher than the current water level of the inlet channel and lower than the maximum When setting the water level, open the water inlet one-way door, close the water outlet one-way door, and control the tidal main channel flow to flow into the Duantou River in one direction. When the current water level of the inlet channel is higher than the highest set water level, the water inlet is closed One-way door

When the tide is low, the current water level of the water channel and the current water level of the main tidal channel are detected. When the water level of the main tidal channel is lower than the current water level of the outlet channel, the water outlet one-way door is automatically opened to control the one-way flow of the broken river flow The tide is the main river.

The technical scheme of the present invention also relates to a device for realizing unidirectional flow of Duotou River by using tides. A water partition wall is arranged in Duotou River. One end of the water partition wall is located at the junction of Duotou River and the main tidal river. There is a gap between the other end of the water wall and the end of the Duantou River, and the interval is 1/3 to 2/3 of the width of the Duantou River, thereby dividing the Duantou River into a water inlet channel and Water outlet channel; there is a water inlet one-way door between the water inlet channel and the main tidal channel, and a water outlet one-way door between the water outlet channel and the main tidal channel; an automatic control device is installed in the water inlet channel, The water outlet channel and the main tidal channel are respectively provided with water level sensing devices, the output ports of each water level sensing device are respectively connected to the input ports of the automatic control device, and the output ports of the automatic control device are connected to control the water inlet Opening and closing of the one-way door and the water outlet one-way door.

The water partition wall of the present invention can be one of a reinforced concrete vertical wall, a continuous pile wall, and a soft partition wall.

The one-way door of the present invention is a mechanical device or engineering structure with positive and reverse flow of water, such as a flap door or a sluice.

The beneficial effects of the invention

Beneficial effect

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention utilizes a water partition wall and two one-way doors to transform the reciprocating flow of the Duantou River into a one-way circulation flow with the help of tidal hydrodynamics. The reciprocating flow of the Duantou River gradually decreases from the mouth to the end of the river. The water area of the Duantou River is basically a dead-water area, with very little water renewal; while the unidirectional circulating flow achieves an orderly flow with a large flow rate. Comprehensive and continuous updates.

2. The device provided by the present invention that uses tides to realize unidirectional flow of the guillotine river completely relies on natural force to perform work, has good water flow effect, large renewal water volume, controllable water level of the guillotine river, simple and convenient, low project investment, and short construction period , Operation and maintenance cost is low, and it has the prospect of promotion and application in river water environment management.

3. The present invention avoids the adverse effects of extreme hydrological phenomena by setting a water level sensing device and simultaneously using tide and water level detection for control.

Brief description of the drawings

Description of the drawings

FIG. 1 is a schematic structural diagram of the river channel and the engineering layout after installing the device for realizing the unidirectional flow of the broken head river provided by the embodiment of the present invention;

2 is a schematic diagram of the inflow of the Duantou River at high tide after the installation of the device for realizing the unidirectional flow of the Duantou River by using the tide provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the outflow of the Duantou River at low tide after installing the device for realizing the unidirectional flow of the Duantou River by using the tide provided by an embodiment of the present invention;

Figure 4 is a schematic diagram of the flow velocity distribution of the reciprocating flow of the original Duantou River;

5 is a schematic diagram of the flow velocity distribution of the one-way circulating flow of the Duantou River after installing the device for realizing the one-way flow of the Duantou River by using tides according to an embodiment of the present invention;

In the figure, 1. Main river channel with tidal; 2. Broken head river; 3. Water inlet one-way door; 4. Water outlet one-way door; 5. Water wall; 6. Rising tide; 7. Ebb tide; 8. Day Current sharing.

Invention embodiment

Embodiments of the invention

The technical scheme of the present invention will be further described below in conjunction with the drawings and embodiments.

Example 1

The technical scheme of the invention is suitable for the running water of the Dutou River in tidal areas.

Refer to Figure 1, which is a structural schematic diagram of the river course and project layout after the modification of the device for realizing the unidirectional flow of the Duantou River provided by the present embodiment; the installation structure of the device is: at the center of the Duantou River 2 , Set up a partition wall 5, the distance between the starting end of the partition wall and the end of the Duantou River is half of the width of the Duantou River, and the terminating end is located at the junction of Duantou River and the main tidal channel 1; There is a one-way gate between the side and the bank of the Duotou River, one of which is the water inlet one-way gate 3, which opens at high tide and is used to control the flow of the tidal main channel 1 into the Duantou River 2 in one direction, and the other is the outlet One-way gate 4, opened at low tide, is used to control the water flow of Duotou River 2 into the main tidal channel 1 in one direction.

In the technical solution of this embodiment, the water partition wall may be one of a reinforced concrete vertical wall, a pile continuous wall, and a soft partition wall. A one-way gate can be a mechanical device or engineering structure with forward and reverse flow of water, such as a flapper gate, etc.; it can also be a traditional sluice gate that uses water level sensing and tide sensing information to achieve automatic control.

In order to avoid the influence of extreme hydrological phenomena, in addition to judging the tide conditions, combined with water level detection. The specific method is to set the highest set water level of the Duantou River. When the tide is high, the current water level of the inlet channel and the current water level of the main tidal channel are detected. When the current water level of the main tidal channel is higher than the current water inlet channel When the water level is lower than the highest set water level, open the water inlet one-way door and close the water outlet one-way door to control the tidal main channel water flow into the Duantou River in one direction. When the current water level of the inlet channel is higher than the highest set water level When, close the water inlet one-way door;

In the technical solution provided by the present invention, the one-way door is located at the end of the partition wall, one is an inlet one-way door through which water flow can enter and cannot exit, and the other is an outlet one-way door through which water flow can exit and cannot enter. The wall and two one-way gates can use tidal hydrodynamics to transform the reciprocating flow of the Duantou River into a one-way circulation flow. When the tide is high, it flows in by itself through the inlet gate, and when the tide is low, it flows out by itself from the outlet gate. The renewal water volume is proportional to the tidal range and the water area of the Duantou River.

Refer to FIG. 2, which is a schematic diagram of the inflow of the guillotine river at high tide after installing the device for realizing the unidirectional flow of the guillotine river by using the tide provided by the embodiment of the present invention. When the tide is high, the water level of the main channel rises and the water level of the main channel is higher than the water level of the Duantou River. The inlet one-way gate 3 is opened and the outlet one-way gate 4 is closed. The main river water flows into the Duantou River.

Refer to FIG. 3, which is a schematic diagram of the outflow of the Duantou River at low tide after installing the device for realizing the unidirectional flow of the Duantou River by using the tide provided by the embodiment of the present invention. When the tide is low, the water level of the main river is lowered, and the water level of the main river is lower than the water level of the Duantou River, the inlet one-way gate 3 is closed, and the outlet one-way door 4 is opened, and the broken-head river water flows into the main river.

The above-mentioned rising and falling tides complete a cycle, realizing the one-way flow of the water body of the Duotou River, which is fully and continuously updated.

Refer to Figure 4, which is a schematic diagram of the flow velocity distribution of the reciprocating flow of the original Duotou River. The ordinate is the flow velocity, and the abscissa is the distance of the corresponding water flow position along the length of the Duantou River (assuming the length of the Duantou River is L). The rising tide 6, the ebb tide 7, and the daily average current 8. As shown in Figure 4, the rising tide 6 and the ebb tide 7 of the Duantou River, the reciprocating flow from the mouth (x=0) to the end of the river (x= L) gradually decreases to zero, and its daily average current 8 is zero, which is basically a stagnant water area with very little water renewal.

Refer to Figure 5, which is a schematic diagram of the flow velocity distribution of the one-way circulating flow of the Duantou River after the modification of the technical solution provided by this embodiment. The ordinate is the flow velocity, and the abscissa is the distance from the one-way gate along the length of the Duantou River to the corresponding position of the current (assuming the length of Duantou River is L). It can be seen from Figure 5 that at high tide, the flow velocity of high tide 6 gradually decreases to zero from the inlet one-way gate 3 (x=0) to the outlet one-way gate 4 (x=2L); at low tide, the ebb tide The water flow velocity of 7 gradually decreases to zero from the water outlet one-way door 4 (x=2L) to the water inlet one-way door 3 (x=0). The daily average flow is 8 unidirectional circulating flow, which realizes an orderly flow, a large flow rate, and a comprehensive and continuous renewal of the water body.

Claims

A method for realizing one-way flow of the Duantou River by using tides. One end of the Duantou River is connected with the main tidal channel, which is characterized by including the following steps:

(1) A partition wall is installed in the Duantou River. One end of the partition wall is located at the junction of the Duantou River and the main tidal channel. There is a gap between the other end of the partition wall and the end of the Duantou River. 1/3 to 2/3 of the width of the channel of the Duantou River, thus dividing the Duantou River into the inlet and outlet channels connected at the end of the Duantou River;

(2) Set up a one-way water inlet door between the water inlet channel and the main tidal channel, and set up a one-way water outlet door between the water outlet channel and the main tidal channel;

(3) According to the tidal information of the main tidal channel, the following methods are used to automatically control the opening or closing of the water inlet one-way door and the water outlet one-way door:

Set the highest set water level of the Duantou River. When the tide is high, detect the current water level of the inlet channel and the current water level of the main tidal channel. When the current water level of the main tidal channel is higher than the current water level of the inlet channel and lower than the maximum When setting the water level, open the water inlet one-way door, close the water outlet one-way door, and control the tidal main channel flow to flow into the Duantou River in one direction. When the current water level of the inlet channel is higher than the highest set water level, the water inlet is closed One-way door

When the tide is low, the current water level of the water channel and the current water level of the main tidal channel are detected. When the water level of the main tidal channel is lower than the current water level of the outlet channel, the water outlet one-way door is automatically opened to control the one-way flow of the broken river flow The tide is the main river.
A device for realizing unidirectional flow of Duotou River by using tides, characterized in that: a water wall is provided in Duotou River, one end of which is located at the junction of Duotou River and the main tidal channel. There is a gap between the other end and the end of the Duantou River, the interval being 1/3 to 2/3 of the width of the Duantou River, thereby dividing the Duantou River into the water inlet and outlet channels connected at the end of the Duantou River ; There is a one-way water inlet door between the water inlet channel and the main tidal channel, and a water outlet one-way door between the water outlet channel and the main tidal channel; automatic control devices are installed in the water inlet channel and the water outlet channel. Water level sensing devices are respectively provided in the main tidal and tidal channels, the output ports of each water level sensing device are respectively connected to the input ports of the automatic control device, and the output ports of the automatic control device are connected to control the water inlet one-way Opening and closing of the door and the water outlet one-way door.
The device for realizing one-way flow of the Duotou River by using tides according to claim 2, characterized in that: the water partition wall is one of a reinforced concrete vertical wall, a continuous pile wall, and a soft partition wall.
The device for realizing one-way flow of the Duotou River by using tides according to claim 2, wherein the one-way door is a mechanical device or an engineering structure with positive water flow and reverse check.
According to claim 4, a device for realizing unidirectional flow of a dead-headed river by using tides, characterized in that the mechanical device for forward water flow and reverse check is a flapper door.
The device for realizing one-way flow of Duantou River by using tides according to claim 4, characterized in that the engineering structure with forward water flow and reverse check is a sluice.