CN211113236U - Mountain area river course flood discharge box culvert inlet structure - Google Patents

Abstract

The utility model provides an inlet structure of a flood discharge box culvert in a mountain river, which comprises an inlet of the flood discharge box culvert and an overflow weir arranged between the first river bank and the second river bank. There is a guide wall connected to the inlet of the flood discharge box culvert in the downstream of the weir, and a gradient steep slope is set between the end of the overflow weir and the bottom plate of the inlet of the flood discharge box culvert. Under the constant runoff of the mountain river, the utility model raises the water level through the overflow weir, opens the diversion gate, and introduces clean water to meet the demand of the downstream landscape water surface. Guided by the guide wall, the smooth transition of the water flow is realized, so that the flood can smoothly enter the flood discharge box culvert, and the flood water is discharged to the downstream through the flood discharge box culvert.

Description

An inlet structure of a flood discharge box culvert in a mountain river

technical field

The utility model belongs to the field of flood discharge design in water conservancy projects, and relates to an inlet structure of a flood discharge box culvert in a mountain river.

Background technique

The mountain river course has the characteristics of large longitudinal slope, short flood duration, large flow velocity, and limited land area on both sides. The flood box culvert solves the sharp contradiction between the water surface landscape and the flood channel, and a diverted inlet structure needs to be arranged at the entrance of the box culvert. Along the direction of the river, the inlet structure mainly plays the role of flood diversion and drainage, that is, under the constant flow of the river, the water is diverted downstream to meet the landscape water consumption. When the river flood occurs, the flood can be introduced into the flood discharge box culvert.

In the prior art, the diversion inlet structure of the flood discharge box culvert is usually provided with an intake gate and a flood gate at the upstream of the river. For example, the utility model patent with the application number CN00240991.7 discloses an automatic flood discharge flood gate, the flood gate comprises a frame with an open upper end, two sides of the frame are connected with shaft sleeves, two sides of the triangular gate are connected with a gate shaft, and the gate shaft is sleeved on In the shaft sleeve, the upper area of the gate is larger than the lower area of the gate, the upper mass of the gate is smaller than the lower mass of the gate, the upper width of the gate is smaller than the upper width of the frame, and the lower width of the gate is larger than the lower width of the frame. When the flood exceeds a certain water level, the gate is automatically turned over, and the flood can be automatically released and distributed.

The invention patent of application number CN201303070327.X relates to an urban river sewage interception box culvert decontamination and diversion system and method, including: a sewage interception box culvert gate, and upstream of the tributary end of the sewage interception box culvert gate is provided. Fork road, box culvert water level meter and box culvert flowmeter are installed upstream of the sewage interception box culvert end of the sewage interception box culvert gate, and a dissolved oxygen meter is installed upstream of the tributary gate, and the adjustment and storage branch road connected to the adjustment and storage tank is installed upstream of the dissolved oxygen meter. , The tributary is set upstream of the regulating and storage tank gate with a tributary inflow water level meter and a tributary flow meter, and a regulating and storage water level meter is set in the regulating and storage fork. The utility model judges the pollution status of the water body by detecting the dissolved oxygen concentration of the water body, and judges whether the sewage interception box culvert overflows by measuring the depth and flow of the water body. Selectively adjust the opening of tributaries into the main stream, sewage interception box culverts and regulating and storage tank gates, and control the flow from tributaries into the main stream channel, sewage interception box culverts and regulating reservoirs, so as to ensure that clean water enters the main stream channel.

However, the above structure requires management personnel to be stationed at the site, or remote control from time to time, which increases project investment and management costs; at the same time, because the river channels in mountainous areas are generally narrow, too many gates can easily affect the flood flow of the river channel.

Utility model content

The purpose of the utility model is to provide an inlet structure of a flood discharge box culvert in a mountain river, which aims to solve the problem in the prior art that too many gates affect the flood discharge of the river, or the water landscape facilities are eroded due to poor flood distribution.

To this end, the utility model provides a flood discharge box culvert inlet structure of a mountain river, including a flood discharge box culvert inlet and an overflow weir arranged between the first river bank and the second river bank, and a lead-in port is arranged upstream of the overflow weir. The sluice gate and the downstream of the overflow weir are built with a guide wall that communicates with the inlet of the flood discharge box culvert, and a gradient steep slope is set between the end of the overflow weir and the bottom plate of the flood discharge box culvert inlet.

The overflow weir is a WES curve weir.

The guide wall is composed of an upstream guide wall, a downstream guide wall, and a connecting retaining wall connecting the upstream guide wall and the downstream guide wall.

The upstream guide wall and the downstream guide wall are both circular arc structures, and the radius of the downstream guide wall is 3-4 times the radius of the upstream guide wall.

The height h _of the upstream guide wall=P+h ₀ +A,

In the formula: P is the height of the overflow weir, which is 0.5m to 1.0m;

h ₀ is the water depth, the unit is m;

A is the safety superelevation, which is 0.5m.

The height _of the downstream guide wall h = h ₁ +A

In the formula: h ₁ is the high water depth at the inlet of the flood discharge box culvert, the unit is m; A is the safety superelevation, which is taken as 0.5m.

The gradient of the gradient steep slope is 1:10～1:20, and its length L=ΔH/1:10～1:20, where ΔH is the distance between the end of the overflow weir and the bottom plate of the flood discharge box culvert inlet. height difference between.

Rubber waterstops are respectively provided at the joints between the overflow weir and the upstream guide wall and between the upstream guide wall and the connecting retaining wall.

The size of the diversion gate is the same as the weir height of the overflow weir.

Compared with the prior art, the utility model has the following beneficial effects:

1. The number of gates is reduced, the width of the overflow weir is increased, and the impact of the structure on the flood discharge of the river is reduced;

2. The overflow weir of the utility model adopts WES curve weir to reduce the turbulence of water flow;

3. The utility model adopts the overflow weir to raise the water level, so that there is a certain amount of water in the upstream to meet the water demand of the downstream landscape; the gradient steep slope is used to make the water flow smoothly transition, and at the same time, the flood is blocked by the guide wall to prevent the flood from scouring the downstream water landscape. , and then solve the problem of flood diversion and landscape water diversion in mountain rivers.

Description of drawings

Fig. 1 is the inlet plan view of the flood discharge box culvert described in the present utility model;

Fig. 2 is A-A sectional view in Fig. 1;

Fig. 3 is B-B sectional view in Fig. 1;

Fig. 4 is C-C sectional view in Fig. 1;

Fig. 5 is D-D sectional view in Fig. 1;

FIG. 6 is an E-E sectional view in FIG. 1 .

Description of reference numerals: 1. Diversion gate; 2. Overflow weir; 3. Guide wall; 4. Gradient steep slope; 5. Inlet of flood discharge box culvert; 6. First river bank;

Detailed ways

In the description of the present invention, it should be noted that the terms "first" and "second" are only used for description purposes, and cannot be understood as indicating or implying relative importance. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be is the connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of being thorough and complete. The present invention is disclosed and the scope of the present invention is fully conveyed to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the invention. In the drawings, the same elements/elements are given the same reference numerals.

Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal meanings.

Example 1

As shown in Figure 1, a flood discharge box culvert inlet structure of a mountain river includes a flood discharge box culvert inlet 5 and an overflow weir 2 arranged between the first river bank 6 and the second river bank 7. The upstream of the overflow weir 2 A diversion gate 1 is provided, a guide wall 3 is built downstream of the overflow weir 2 that communicates with the flood discharge box culvert inlet 5 , and a gradient steep slope 4 is arranged between the end of the overflow weir 2 and the bottom plate of the flood discharge box culvert inlet 5 .

The utility model uses the overflow weir 2 and the diversion gate 1 to jointly block the riverbed to coordinately control the water flow. Under the constant runoff of the mountain river, the overflow weir 2 is used to raise the water level, the diversion gate 1 is opened, and clean water is introduced. The diversion gate 1 is closed, the flood water passes over the overflow weir 2, and the flood behind the weir enters the flood discharge box culvert inlet 5 under the guidance of the guide wall 3 and the gradient steep slope 4, and then leads to the downstream of the river channel through the flood discharge box culvert.

Example 2

，曲线后直线段坡度为1:1.5，On the basis of Example 1, as shown in Figure 2, further, the overflow weir 2 is a WES curve weir, and the curve equation of the weir top surface of the overflow weir is:

, the slope of the straight line behind the curve is 1:1.5,

The WES curve weir can reduce the turbulence of water flow as much as possible.

Further, as shown in FIGS. 4 and 5 , the weir height P of the overflow weir 2 is 0.5-1.0 m, the diversion gate 1 is arranged on the axis of the overflow weir 2 , and the diversion gate 1 is elevated on the overflow weir 2 . At the water level, the gate size of the diversion gate 1 is consistent with the height of the weir. Preferably, the diversion gate 1 adopts a rectangular gate of 1.0m×1.0m.

Example 3

On the basis of the above-mentioned embodiment, further, as shown in Fig. 3 and Fig. 6 , the guide wall 3 is mainly used to block the flood after passing through the overflow weir 2 and protect the downstream water landscape facilities. The guide wall 3 is a curved structure, It consists of an upstream guide wall, a downstream guide wall and a connecting section retaining wall connecting the upstream guide wall and the downstream guide wall.

Preferably, the upstream guide wall and the downstream guide wall are arc-shaped structures, so that the water flow is smooth and the water flow capacity is increased. The wall radius should be larger than the upstream guide wall radius. In this example, the downstream guide wall radius is 4 times the upstream guide wall radius.

Further, the height h _of the upstream guide wall=P+h ₀ +A, where: P is the height of the weir 2 of the WES curve weir, taking 0.5m to 1.0m; h ₀ is the water depth above the weir, the flow rate through the weir The formula is calculated and determined, A is the safe superelevation, which is 0.5m.

The height h _of the downstream guide wall = h ₁ +A, where: h ₁ is the height of the backwater at the inlet of the flood discharge box culvert 5, which is calculated and determined by the semi-pressurized flow formula of the tunnel; A is the safety superelevation, which is 0.5m .

The weir flow flow formula, the tunnel semi-pressurized flow formula and the calculation method thereof are all known in the prior art, and will not be repeated here.

Example 4

On the basis of the above embodiment, further, the gradient steep slope 4 mainly connects the overflow weir 2 and the inlet of the flood discharge box culvert, and the gradient gradient 4 should be as gentle as possible to ensure that the flood has a sufficient shrinkage process and reduce the swirl flow. The possibility of occurrence, the utility model recommends that the gradient of the gradient steep slope 4 is 1:10～1:20, its length L=ΔH/(1:10～1:2), and ΔH is the end of the overflow weir 2 and the discharge The height difference between the inlet 5 bottom plates of the Hong Box Culvert.

Example 5

The construction steps of the present utility model include: step 1, implementing a longitudinal cofferdam near the water diversion gate 1, using a concrete cofferdam for the longitudinal cofferdam, arranging a horizontal cofferdam on the upstream and downstream of the diversion gate 1 respectively, and the lateral cofferdam adopts an earth-rock structure, The vertical cofferdam is embedded in the horizontal cofferdam, the horizontal cofferdam and the vertical cofferdam should be closed, and the water stop should be set up if necessary. The construction of the cofferdam meets the requirements of the current "Code for Design of Construction Organization of Water Conservancy and Hydropower Engineering"; Meet the requirements of the current "Sluice Construction Specifications"; Step 3, first remove the downstream cofferdam, remove the upstream cofferdam and finally remove the longitudinal cofferdam; Step 4, implement the horizontal cofferdam on the upstream and downstream of the overflow weir 2, and arrange the horizontal cofferdam On the outside of overflow weir 2, guide wall 3, and gradient steep slope 4, the lateral cofferdam is closely connected with diversion gate 1; in step 5, implement overflow weir 2, guide wall 3, gradient steep slope 4, and overflow should be implemented first during construction For the weir, the guide wall is implemented, and finally the steeper slope 4 is implemented, and the construction meets the requirements of the current "Hydraulic Concrete Construction Specification"; step 6, remove the cofferdam, first remove the downstream cofferdam, and then remove the upstream cofferdam.

The operation and management steps of the utility model are as follows: when the landscape is replenished, the water diversion gate 1 is opened to divert water, the clear water enters the downstream landscape water surface through the diversion gate 1, the diversion gate 1 is closed during the flood season, the river channel overflows and discharges the flood through the overflow weir 2, and the overflow weir is regularly drained. The upstream silt is cleaned up, and the structure is regularly maintained and repaired to increase the service life of the structure.

Claims (9)

1. The utility model provides a mountain area river course flood discharge box culvert inlet structure which characterized in that: including flood discharge box culvert import (5) and overflow weir (2) of setting between first river bank (6) and second river bank (7), the upper reaches of overflow weir (2) sets up a diversion floodgate (1), and the low reaches of overflow weir (2) are built and are had guide wall (3) with flood discharge box culvert import (5) intercommunication, are provided with gradual change abrupt slope (4) between the bottom plate of the terminal of overflow weir (2) and flood discharge box culvert import (5).

2. The mountain area river course flood discharge box culvert inlet structure of claim 1, characterized in that: the overflow weir (2) is a WES curve weir.

3. The mountain area river course flood discharge box culvert inlet structure of claim 1, characterized in that: the guide wall (3) is composed of an upstream guide wall, a downstream guide wall and a connection retaining wall for connecting the upstream guide wall and the downstream guide wall.

4. The mountain area river course flood discharge box culvert inlet structure of claim 3, characterized in that: the upstream guide wall and the downstream guide wall are both of arc-shaped structures, and the radius of the downstream guide wall is 3-4 times that of the upstream guide wall.

5. The mountain area river course flood discharge box culvert inlet structure of claim 3, characterized in that: height h of the upstream guide wall_{On the upper part}=P+h₀+A,

In the formula: p is the height of the overflow weir (2), and is 0.5m to 1.0 m;

h₀is the water depth, in m;

a is a safe super high, and is 0.5 m.

6. The mountain area river course flood discharge box culvert inlet structure of claim 3, characterized in that: height h of the downstream guide wall_{Lower part}= h₁+A

In the formula: h is₁The water depth is set to m in order to block the inlet (5) of the flood discharging box culvert; a is a safe super high, and is 0.5 m.

7. The mountain river flood discharge box culvert inlet structure is characterized in that the gradient of the gradual steep slope (4) is 1: 10-1: 20, the length of the gradual steep slope is L = △ H/(1: 10-1: 20), and △ H is the height difference between the tail end of the overflow weir (2) and the bottom plate of the flood discharge box culvert inlet (5).

8. The mountain area river course flood discharge box culvert inlet structure of claim 3, characterized in that: and rubber water stops are respectively arranged at the joints between the overflow weir (2) and the upstream guide wall and between the upstream guide wall and the connection retaining wall.

9. The mountain area river course flood discharge box culvert inlet structure of claim 1, characterized in that: the size of the water diversion gate (1) is consistent with the height of the overflow weir (2).

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