Prefabricated multi-arch type drop structure for eliminating drop of river channel

Abstract

The utility model discloses a prefabricated multi-arch type drop structure for eliminating the drop of a river channel, which comprises a plurality of arch type splicing modules, and the plurality of arch type splicing modules are linearly connected and arranged in parallel and are used for eliminating the drop of the river channel. A plurality of arch-type splicing modules form a continuously connected drop weir and an integral bottom plate, so that the actual water cross section is increased, and the discharge capacity is improved; the water gathering effect generated when water passes through the top of the drop weir improves the energy dissipation efficiency and shortens the length of the stilling pool; and the plurality of arch-type splicing modules are convenient for modular prefabrication and replacement, so that the subsequent operation and maintenance work is facilitated, and the maintenance cost is saved. The hydraulic drop structure solves the problems that an existing hydraulic drop structure is long in on-site construction period and large in difficulty.

Description

Technical Field

[0001] The utility model belongs to the technical field of river channel regulation in water conservancy projects, and relates to a prefabricated multi-arch type waterfall structure for eliminating river channel drop. Background Art

[0002] A drop structure is a connecting structure that allows water from the upstream of a channel to flow out through a drop gap and freely fall into the stilling basin of the downstream channel. Depending on the size of the drop between the upstream and downstream channels, single-stage or multi-stage arrangements can be adopted. A drop structure usually consists of an upstream inlet connection section, a control weir, a stilling basin, and a downstream outlet connection and rectifier masonry section. Traditional drop structures usually use a gravity structure, which requires a large amount of excavation on the river channel and then cast-in-place construction. The complexity and difficulty of existing drop structure construction leads to long on-site construction periods and large construction interfaces, requiring high-skilled on-site personnel and high quality requirements. Utility Model Content

[0003] The purpose of the utility model is to provide a prefabricated multi-arch drop structure for eliminating the drop in a river channel, thereby solving the problems of long on-site construction period and great difficulty in existing drop structures.

[0004] The technical solution adopted by the utility model is a prefabricated continuous arch type waterfall structure for eliminating the drop of the river channel, which includes a plurality of arch type splicing modules. The plurality of arch type splicing modules are arranged in parallel in a straight line to eliminate the drop of the river channel.

[0005] The utility model is also characterized in that:

[0006] Each arch-type splicing module includes a base plate, which has a rectangular structure. A plurality of steel bar holes are opened on the upper surface of the base plate. The plurality of steel bar holes are arranged in a U-shaped structure on the edge of the upper surface of the base plate. The opening direction of the U-shaped structure is opposite to the direction of water flow. A steel bar is vertically inserted into each steel bar hole, and a drop weir is set on the steel bar.

[0007] The drop weir is a U-shaped protrusion, the outer curved portion of the U-shaped protrusion is an inclined slope structure obliquely downward along the direction of water flow, the inner side of the U-shaped protrusion is a vertical slope structure, the upper surface of the U-shaped protrusion is a horizontal overflow section, the horizontal overflow section is used for water to flow through the top of the drop weir, and the edges of the straight portions on both sides of the curved portion of the U-shaped protrusion are provided with diversion slopes along the extension direction, and the diversion slopes are inclined.

[0008] Several grouting holes are opened on the horizontal overflow section.

[0009] The angle between the inclined surface and the horizontal plane of the base plate is 25°-35°.

[0010] A regular quadrangular pyramid structure with a larger upper portion and a smaller lower portion is provided on the lower surface of the bottom plate, and the regular quadrangular pyramid structure is arranged opposite to the curved portion of the U-shaped protrusion.

[0011] The waterfall weir is bonded with poured concrete.

[0012] The beneficial effects of the utility model are as follows: the prefabricated continuous arch type waterfall structure of the utility model is used to eliminate the river drop, has reasonable force, good discharge capacity and energy dissipation effect, rich waterfall effect, and effectively reduces the construction period by using prefabricated concrete components. The waterfall weir structure design and construction method is simple and easy to use, convenient to construct, and can adapt to various environments, reduces the construction cost of cofferdam inversion, etc., saves construction cost, and can be widely used in the field of river drop buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of a prefabricated multi-arch waterfall structure for eliminating river drop in the utility model;

[0014] Figure 2 It is a structural diagram of each arch-type splicing module of the utility model;

[0015] Figure 3 It is a top view of each arched splicing module of the utility model.

[0016] In the figure, 1. waterfall weir, 2. bottom plate, 3. steel bar hole, 4. steel bar, 5. grouting hole, 6. arch splicing module. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Example 1

[0019] The utility model is a prefabricated arch-type waterfall structure for eliminating the drop in the river. Figure 1 As shown, it includes a plurality of arch-type splicing modules 6, which are arranged in parallel in a straight line to eliminate the drop in the river channel.

[0020] Example 2

[0021] The utility model is a prefabricated continuous arch type water drop structure for eliminating the river drop, comprising a plurality of arch type splicing modules 6, which are arranged in parallel in a straight line to eliminate the river drop. Figure 2 and Figure 3As shown, on the basis of Example 1, each arch splicing module 6 includes a base plate 2, the base plate 2 has a rectangular structure, and a plurality of steel bar holes 3 are opened on the upper surface of the base plate 2. The plurality of steel bar holes 3 are arranged in a U-shaped structure on the edge of the upper surface of the base plate 2. The opening direction of the U-shaped structure is opposite to the direction of water flow. A steel bar 4 is vertically inserted into each steel bar hole 3, and a drop weir 1 is arranged on the steel bar 4. The drop weir 1 is installed on the base plate 2, and the drop weir 1 is a U-shaped protrusion. The curved portion on the outer side of the U-shaped protrusion is an inclined slope structure obliquely downward in the direction of water flow, and the inner side of the U-shaped protrusion is a vertical slope structure. The upper surface of the U-shaped protrusion is a horizontal overflow section, and the horizontal overflow section is used for water to flow through the top of the drop weir 1. A plurality of grouting holes 5 are opened on the horizontal overflow section. The edges of the straight portions on both sides of the curved portion of the U-shaped protrusion are provided with diversion slopes along the extension direction. The diversion slope is an inclined surface, and the angle between the inclined surface and the horizontal plane of the base plate 2 is 25°-35°.

[0022] Example 3

[0023] The present invention is a prefabricated continuous arch type water drop structure for eliminating the drop of a river channel, comprising a plurality of arch type splicing modules 6, which are arranged in parallel in a straight line to eliminate the drop of a river channel. On the basis of Example 2, each arch type splicing module 6 comprises a bottom plate 2, the bottom plate 2 presents a rectangular parallelepiped structure, a plurality of steel bar holes 3 are provided on the upper surface of the bottom plate 2, and the plurality of steel bar holes 3 are arranged in a U-shaped structure on the edge of the upper surface of the bottom plate 2, the opening direction of the U-shaped structure is arranged relative to the direction of water flow, a steel bar 4 is vertically inserted into each steel bar hole 3, a water drop weir 1 is provided on the steel bar 4, the water drop weir 1 is installed on the bottom plate 2, the water drop weir 1 is a U-shaped protrusion, the outer curved portion of the U-shaped protrusion is an inclined slope structure obliquely downward along the direction of water flow, the inner side of the U-shaped protrusion is a vertical slope structure, and the upper surface of the U-shaped protrusion is a water drop weir. Flat overflow section, the horizontal overflow section is used for water passing through the top of the drop weir 1, a number of grouting holes 5 are opened on the horizontal overflow section, and diversion slopes are set along the extension direction of the edges of the straight parts on both sides of the U-shaped convex curved part. The diversion slope is an inclined surface, and the angle between the inclined surface and the horizontal plane of the bottom plate 2 is 25°-35°; a number of arch-type splicing modules 6 form a continuously connected drop weir 1 and an integral bottom plate 2, which increases the actual water-passing section, thereby improving the discharge capacity; the water-gathering effect generated when water passes through the top of the drop weir 1 improves the energy dissipation efficiency and shortens the length of the stilling pool; the drop effect presented during water passing is also richer.

[0024] Example 4

[0025] The present invention is a prefabricated continuous arch type water drop structure for eliminating the drop in a river channel, comprising a plurality of arch type splicing modules 6, which are arranged in parallel and connected in a straight line to eliminate the drop in a river channel. Each arch type splicing module 6 comprises a bottom plate 2, which has a rectangular structure, and a plurality of steel bar holes 3 are provided on the upper surface of the bottom plate 2. The plurality of steel bar holes 3 are arranged in a U-shaped structure on the edge of the upper surface of the bottom plate 2, and the opening direction of the U-shaped structure is arranged relative to the direction of water flow. A steel bar 4 is vertically inserted into each steel bar hole 3, and a water drop weir 1 is provided on the steel bar 4. The water drop weir 1 is installed on the bottom plate 2, and the water drop weir 1 is in the form of a U-shaped protrusion. The outer curved portion of the U-shaped protrusion is an inclined slope structure obliquely downward in the direction of water flow, and the inner side of the U-shaped protrusion is a vertical slope structure, and the upper surface of the U-shaped protrusion is a horizontal overflow section. The horizontal overflow section is used for water flow through the top of the drop weir 1. Several grouting holes 5 are provided on the horizontal overflow section. The edges of the straightened portions on both sides of the U-shaped raised curved portion are provided with diversion slopes along the extension direction. The diversion slopes are inclined, and the angle between the inclined surface and the horizontal plane of the bottom plate 2 is 25°-35°. Several arch-type splicing modules 6 form a continuously connected drop weir 1 and an integral bottom plate 2, increasing the actual water flow section and thus improving the discharge capacity. The water-collecting effect generated when water flows through the top of the drop weir 1 improves the energy dissipation efficiency and shortens the length of the stilling pool. The drop effect presented during water flow is also more diverse. Based on Example 3, a regular quadrangular pyramid-shaped structure with a larger upper portion and a smaller lower portion is provided on the lower surface of the bottom plate 2. The regular quadrangular pyramid-shaped structure is arranged opposite to the curved portion of the U-shaped raised portion. For a river with a high drop, when the water flows through, under the action of gravity acceleration, a large impact force is generated on the bottom of the drop weir 1. The regular quadrangular pyramid structure as the foundation of the drop weir 1 can reduce the impact of the water flow, reduce safety hazards, and extend the service life.

[0026] Example 5

[0027] The present invention is a prefabricated continuous arch type water drop structure for eliminating the drop in a river channel, comprising a plurality of arch type splicing modules 6, which are arranged in parallel and connected in a straight line to eliminate the drop in a river channel. Each arch type splicing module 6 comprises a bottom plate 2, which has a rectangular structure, and a plurality of steel bar holes 3 are provided on the upper surface of the bottom plate 2. The plurality of steel bar holes 3 are arranged in a U-shaped structure on the edge of the upper surface of the bottom plate 2, and the opening direction of the U-shaped structure is arranged relative to the direction of water flow. A steel bar 4 is vertically inserted into each steel bar hole 3, and a water drop weir 1 is provided on the steel bar 4. The water drop weir 1 is installed on the bottom plate 2, and the water drop weir 1 is in the form of a U-shaped protrusion. The outer curved portion of the U-shaped protrusion is an inclined slope structure obliquely downward in the direction of water flow, and the inner side of the U-shaped protrusion is a vertical slope structure, and the upper surface of the U-shaped protrusion is a horizontal overflow section. The horizontal overflow section is used to pass water from the top of the drop weir 1. Several grouting holes 5 are provided on the horizontal overflow section. Diversion slopes are provided along the extension direction of the edges of the straightened portions on both sides of the U-shaped raised bend. The diversion slopes are inclined, and the angle between the inclined surface and the horizontal plane of the bottom plate 2 is 25°-35°. Several arch-shaped splicing modules 6 form a continuously connected drop weir 1 and an integral bottom plate 2, increasing the actual water flow cross-section and thus improving the discharge capacity. The water-collecting effect generated when water flows over the top of the drop weir 1 improves energy dissipation efficiency and shortens the length of the stilling basin. The drop effect presented during water flow is also more diverse. A regular quadrangular pyramid-shaped structure with a larger upper portion and a smaller lower portion is provided on the lower surface of the bottom plate 2. The regular quadrangular pyramid-shaped structure is arranged opposite the curved portion of the U-shaped raised portion. For river channels with high drop heights, when the river water flows through, the acceleration of gravity exerts a greater impact force on the bottom of the drop weir 1. The regular quadrangular pyramid-shaped structure, as the foundation of the drop weir 1, can reduce the impact of the water flow, minimize safety hazards, and extend its service life. On the basis of Example 4, the drop weir 1 is bonded by pouring concrete, which facilitates the prefabrication of modules, shortens the construction time, and facilitates transportation and construction.

[0028] The working principle of the prefabricated continuous arch type drop structure of the present invention for eliminating the river channel drop is as follows: the inclined diversion slope slows down the speed of the water flow, the drop weir 1 is a U-shaped bulge, and after the water flows into the drop weir 1, it flows along the winding curve to unload the force. In the process of flowing, it is continuously affected by the resistance, thereby avoiding the damage to the drop weir 1 caused by the continuous unidirectional scouring of the water flow, and improving the strength of the drop weir 1. The drop weir 1 is firmly combined together by the steel bars 4 and the steel bar holes 3 through the reserved grouting holes 5 to resist large impact force. Grouting is used for prevention, which greatly improves the impact resistance and strengthens the support for the drop weir 1, thereby improving the strength and service life of the drop weir 1.

[0029] The prefabricated continuous arch waterfall structure for eliminating river channel drop in this utility model operates as follows: a corresponding number of arched splicing modules 6 are set according to the width of the river channel. Several arched splicing modules 6 are constructed in a straight line at the river channel drop point. The middle area of ​​the U-shaped protrusion of the waterfall weir 1 encloses an energy dissipation basin, which has the effect of preventing impact force. The U-shaped protrusion curve increases the overflow front of the river, ensuring the normal flow of the river channel. The increase in sediment deposition in the river channel through the waterfall weir 1 raises the riverbed surface, stabilizes the riverbed, reduces the longitudinal slope of the river channel, reduces the kinetic energy of the downstream water flow, reduces the scouring and destructive force of the downstream water flow, and reduces the flow rate of the downstream water flow.

[0030] The present invention is a prefabricated continuous arch-type waterfall structure for eliminating the drop in a river channel, comprising a plurality of arch-type splicing modules 6, which are arranged in parallel in a straight line to eliminate the drop in a river channel. The present invention forms a continuously connected waterfall weir and an integral bottom plate through a plurality of arch-type splicing modules 6. The U-shaped raised curved portion forms a continuous arch layout, which increases the actual water-passing cross-section, thereby improving the discharge capacity. When water flows through the top of the arch ring of the U-shaped raised curved portion, the water-collecting effect generated improves the energy dissipation efficiency and shortens the length of the stilling pool. The plurality of arch-type splicing modules are easy to prefabricate in a modular manner and are easy to replace, which is beneficial to subsequent operation and maintenance work and saves maintenance costs. The present invention solves the problems of long on-site construction period and high difficulty in existing waterfall structures. The use of prefabricated concrete components effectively reduces the construction period, reduces the construction costs such as the inverted discharge of the cofferdam, and saves construction costs. The plurality of arch-type splicing modules 6 are easy to prefabricate in a modular manner and are easy to replace, which is beneficial to subsequent operation and maintenance work and saves maintenance costs.

Claims

1. A prefabricated multi-arch waterfall structure for eliminating river drop, characterized in that: It comprises a plurality of arch-type splicing modules (6), wherein the plurality of arch-type splicing modules (6) are arranged in parallel in a straight line and are used to eliminate the drop of the river channel; Each of the arch-type splicing modules (6) comprises a bottom plate (2), the bottom plate (2) presenting a rectangular parallelepiped structure, a plurality of steel bar holes (3) being provided on the upper surface of the bottom plate (2), the plurality of steel bar holes (3) being arranged in a U-shaped structure at the edge of the upper surface of the bottom plate (2), the opening direction of the U-shaped structure being arranged opposite to the direction of water flow, a steel bar (4) being vertically inserted into each steel bar hole (3), and a water drop weir (1) being provided on the steel bar (4).

2. The prefabricated multi-arch waterfall structure for eliminating river drop according to claim 1, characterized in that: The drop weir (1) is in the form of a U-shaped protrusion, the outer curved portion of the U-shaped protrusion is an inclined slope structure obliquely downward in the direction of water flow, the inner side of the U-shaped protrusion is in the form of a vertical slope structure, the upper surface of the U-shaped protrusion is a horizontal overflow section, and the horizontal overflow section is used for water to flow through the top of the drop weir (1). The edges of the straight portions on both sides of the curved portion of the U-shaped protrusion are provided with diversion slopes along the extension direction, and the diversion slopes are in the form of inclined surfaces.

3. The prefabricated multi-arch waterfall structure for eliminating river drop according to claim 2, characterized in that: A plurality of grouting holes (5) are provided on the horizontal overflow section.

4. The prefabricated multi-arch waterfall structure for eliminating river drop according to claim 3, characterized in that: The angle between the inclined surface and the horizontal plane of the bottom plate (2) is 25°-35°.

5. The prefabricated multi-arch waterfall structure for eliminating river drop according to claim 4, characterized in that: A regular quadrangular pyramid-shaped structure with a larger upper portion and a smaller lower portion is provided on the lower surface of the bottom plate (2), and the regular quadrangular pyramid-shaped structure is arranged opposite to the curved portion of the U-shaped protrusion.

6. The prefabricated multi-arch waterfall structure for eliminating river drop according to claim 1, characterized in that: The drop weir (1) is bonded by pouring concrete.

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