CN101761056B - Differential soleplate river sluice - Google Patents

Abstract

The invention relates to a differential floor barrage. The chamber section of the barrage includes two chambers with different gate floor elevations, namely the first chamber with a low gate floor and the second chamber with a high gate floor or weir crest. Two sluice chambers; the elevation of the sluice floor of the first sluice chamber is equal to or slightly higher than the elevation of the upstream river bed; the bottom plate or weir crest elevation of the sluice floor of the second sluice chamber is obviously higher than the elevation of the upstream river bed, And it is also higher than the elevation of the gate bottom plate of the first lock chamber. The barrage of the present invention adopts the layout form of the differential bottom plate, so that the barrage can not only maintain a large storage capacity, discharge sediment, but also avoid the contradiction of high water retaining height and high engineering cost. The principle is simple, It is of practical value to build barrages on rivers with more sediment in the incoming water of the river course.

Description

Differential floor barrage

Technical field:

The invention belongs to the water conservancy industry, and relates to building a barrage on a river with a lot of silt in the incoming water, in particular to a differential floor barrage.

Background technique:

Barrage is an important building in hydraulic engineering, and its layout and structure shape are related to many hydraulic parameters and river sediment movement forms. A well-designed barrage structure can not only achieve the purpose of water storage, power generation, irrigation, urban water supply, etc., but also can discharge the silt deposited in front of the sluice, maintain a large effective storage capacity, prevent the downstream river bed protection layer from being eroded, and maintain the stability of the river channel . Whether it can meet the construction purpose of the barrage project depends on its structural shape design.

In the past, there are roughly two types of barrage designs. One is to increase the water storage capacity and reduce the cost of the project. Generally, the height of the gate floor is raised to form a practical weir. The weir is equipped with a water-retaining gate, and the water-retaining height of the gate is relatively high. Low, the cost is also low. However, this type of structure not only reduces the cost of the project, but also causes a large amount of sediment from the upstream to deposit in the reservoir in front of the sluice, and eventually the sediment can be silted up to the height of the weir crest, which greatly reduces the effective storage capacity of the reservoir. At the same time, the downstream channel cannot get Sediment replenishment causes excessive scouring of the river channel, which poses a great threat to the safety of dikes and downstream flood control, and the amount of protection works increases; the other is to discharge sediment and flood discharge, and all gate floors are arranged at the same or slightly higher elevation than the river bed. Although this body shape meets the requirements for flood discharge and sediment discharge, the high water retaining height of the gate increases the project investment.

Invention content:

The purpose of the present invention is to overcome the deficiencies in the design of existing barrages, and to design a design with a simple principle, which can effectively discharge the sediment in the upstream reservoir area, maintain a large effective storage capacity, and keep the downstream river bed protection layer from being damaged. damage, maintain the stability of the downstream river, and at the same time, take into account the purpose of reducing project investment, and have strong practicability. It has high practical value for building barrages on rivers with more sediment in the incoming water of the river.

The invention provides a differential floor barrage, comprising an upstream connection section, a sluice chamber section and a downstream connection section. The sluice chamber section includes a gate pier, a sluice floor and a gate. It includes two types of lock chambers with different gate floor elevations, that is, the first lock chamber with a low gate floor and the second lock chamber with a high gate floor or weir top; the elevation of the gate floor of the first lock chamber is equal to or slightly higher than that of the upstream The elevation of the river bed; the bottom plate or weir crest elevation of the gate floor of the second lock chamber is obviously higher than the elevation of the upstream river bed, and also higher than the elevation of the gate floor of the first lock chamber; the first lock chamber and The second lock chambers are arranged alternately.

Preferably, the water retaining gate on the first lock chamber is the first water retaining gate, the water retaining gate on the second lock chamber is the second water retaining gate, and the top elevations of the first water retaining gate and the second water retaining gate are the same .

Preferably, the bottom plate of the first lock chamber is a wide-crested weir.

Preferably, the gate floor of the second lock chamber adopts utility weir or hump weir.

Preferably, the numbers of the first lock chambers and the second lock chambers are equal.

Preferably, the water retaining height of the first retaining gate and the second retaining gate differ by about one time.

The beneficial effect of the present invention is that: the arrangement form of the differential bottom plate enables the barrage not only to maintain a large storage capacity, discharge sediment, but also to avoid the contradiction of large water retaining height and high engineering cost, and the principle is simple. It is of practical value to build barrages on rivers with more sediment in the incoming water of the river course.

Description of drawings:

Fig. 1, the plan view of barrage of the present invention

Fig. 2, the upstream vertical view of the barrage of the present invention

Fig. 3, the A-A sectional view of the barrage of the present invention

Fig. 4, the B-B sectional view of barrage of the present invention

In the figure, 1 is the upstream river channel, 2 is the differential floor barrage sluice, 3 is the first sluice chamber with a low sluice floor, 4 is the second sluice chamber with a high sluice floor, 5 is the gate floor of the first sluice chamber, 6 7 is the river bed of the upstream river, 8 is the first water retaining gate, 9 is the second water retaining gate, 10 is the wing wall connecting the barrage and the upstream river bank, and 11 is the downstream stilling pool , 12 are gate piers.

Detailed ways:

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 , the overall layout of the differential floor barrage 2 of the present invention is similar to that of the traditional barrage, including an upstream connection section, a sluice chamber section and a downstream connection section. Among them, the upstream connection section includes the wing wall 10 connecting the barrage with the upstream bank, the downstream connection section includes the downstream stilling basin 11, and the sluice chamber section includes the gate pier 12, the gate floor and the gate. The lock chamber section of the barrage of the present invention includes two types of lock chambers with different floor or weir crest elevations, namely the first lock chamber 3 with a low gate floor and the second lock chamber 4 with a high gate floor. The bottom plate of the first sluice chamber 3 is generally a wide-crested weir, and the elevation of the sluice bottom plate 5 is equal to or slightly higher than the elevation of the riverbed 7 of the upstream channel. The gate floor 6 of the second lock chamber 4 with a high gate floor is obviously higher than the elevation of the upstream river bed 7, and also higher than the elevation of the gate floor 5, that is to say, the gate floors 5 and 6 are differential. The gate floor 6 of the second lock chamber 4 can also use a wide-crested weir, but in order to reduce the cost, it is preferable to use a practical weir or a hump weir. At this time, the floor elevation of the gate floor 6 is the weir crest elevation. The water retaining gate on the first lock chamber 3 is the first water retaining gate 8, the water retaining gate on the second lock chamber 4 is the second retaining gate 9, the first retaining gate 8 and the second retaining gate 9 Top elevation is identical, like this, the water-retaining height of the first water-retaining gate 8 is just lower than the water-retaining height of the second water-retaining gate 9, and the water-retaining height of the two can differ about one time. The preferred arrangement of the first lock chamber 3 and the second lock chamber 4 is alternately arranged, as shown in Figure 1 and Figure 2, of course, the first lock chamber 3 and the second lock chamber 4 can also have other arrangements, such as Several first lock chambers 3 are arranged adjacently, and then several second lock chambers 4 are arranged; it is also possible to arrange the first lock chambers 3 on the side where the sediment deposit is more serious according to the sediment deposition of the upstream river channel, so as to facilitate flushing. sand, while the second lock chamber 4 is arranged on the other side. The numbers of the first lock chambers 3 and the second lock chambers 4 may be equal or not.

According to the hydrology, topography, geology, operation requirements, construction level and other conditions of the sluice site, calculate the total flow width, the width and quantity of the single-hole sluice chamber, combine the design requirements of the present invention, adopt sluice floors with different elevations and structural forms, and According to the safety requirements, calculate the stability of the lock chamber, determine the size of the gate pier, design the anti-scouring and energy dissipation design of the downstream of the gate, and design the wing wall connecting the upstream and downstream. In order to ensure that the engineering design is reasonable and safe, model tests can be carried out at the same time for verification.

When there is a flood in the flood season, opening the gate can discharge part of the sediment in front of the gate to the downstream to maintain a large storage capacity. Moreover, the sediment discharged to the downstream can serve as a protective layer for the downstream river channel and maintain the stability of the river channel.

The differential bottom plate barrage 2 of the present invention adopts the differential gate bottom plates 5 and 6, on the one hand, it can avoid the contradiction of using all high water retaining gates, which leads to high engineering cost, and on the other hand, it can utilize the low elevation of the gate bottom plate The first sluice chamber 3 can not only effectively discharge the sediment in the upstream reservoir area, maintain a large effective storage capacity, but also keep the downstream riverbed protective layer from being damaged, and maintain the stability of the downstream river channel. At the same time, it takes into account the reduction of project investment It has strong practicality and has high practical value for building barrages on rivers with more sediment in the incoming water.

Claims (6)

1. differential soleplate river sluice, comprise upstream linkage section, lock chamber section and downstream linkage section, described lock chamber section comprises gate pier (12), gate floor and gate, it is characterized in that, described lock chamber section comprises two kinds of lock chambers that the gate floor elevation is different, second lock chamber (4) that first lock chamber (3) that promptly gate floor is low and gate floor or weir crest are high; The elevation of the gate floor (5) of described first lock chamber (3) equals or a little more than the elevation of riverbed, upper river (7); The base plate of the gate floor (6) of described second lock chamber (4) or weir crest elevation be apparently higher than the elevation of riverbed, upper river (7), and be higher than elevation, described first lock chamber (3) and the alternate layout of second lock chamber (4) of the gate floor (5) of first lock chamber (3).

2. differential soleplate river sluice as claimed in claim 1, it is characterized in that: the backwater gate on first lock chamber (3) is first backwater gate (8), backwater gate on second lock chamber (4) is second backwater gate (9), and first backwater gate (8) is identical with the top elevation of second backwater gate (9).

3. differential soleplate river sluice as claimed in claim 1 or 2 is characterized in that: the gate floor (5) of described first lock chamber (3) is a broad crested weir.

4. differential soleplate river sluice as claimed in claim 1 or 2 is characterized in that: the gate floor (6) of described second lock chamber (4) adopts practical weir or hump weir.

5. differential soleplate river sluice as claimed in claim 4 is characterized in that: the quantity of described first lock chamber (3) and second lock chamber (4) equates.

6. differential soleplate river sluice as claimed in claim 2 is characterized in that: described first backwater gate (8) differs about one times with the dash height of second backwater gate (9).

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