Inverted siphon overflow weir structure

Abstract

The utility model provides an inverted siphon overflow weir structure which comprises a weir body, an overflow channel, a maintenance channel and an inverted siphon, the weir body is arranged on a riverbed; the overflow channel penetrates through the weir body, and a water inlet and a water outlet of the overflow channel are respectively connected with an upstream water surface and a downstream water surface; the overhaul channel is arranged on the weir body and is communicated with the overflow channel; a pipe body of the inverted siphon is arranged between the bottom of the weir body and a riverbed, and a water inlet and a water outlet of the inverted siphon are connected with the upstream water surface and the downstream water surface correspondingly. The inverted siphon is arranged between the bottom of the weir body and the riverbed, and the water inlet and the water outlet of the inverted siphon are respectively connected with the upstream water surface and the downstream water surface, so that water in an upstream reservoir area can be emptied by using the inverted siphon before the overflow channel is overhauled, and the overhauling operation is more convenient and safer; furthermore, the inverted siphon can be used for adjusting the water level in the flood season, and the flood prevention capacity of the overflow weir is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water conservancy engineering, and particularly relates to an inverted siphon overflow weir structure. Background Art

[0002] Overflow weir is a kind of building built on the riverbed, mostly cast in concrete. Overflow weir is equipped with overflow channel for overflow. A large amount of sediment accumulates in the overflow channel after long-term flow, which greatly affects the overflow effect of the overflow channel. Therefore, the overflow channel needs to be inspected and repaired at regular intervals.

[0003] The existing technology mainly sets a maintenance cover and a gate on the overflow channel. During maintenance, the gate is closed to cut off the water flow in the upstream reservoir and discharge the water in the overflow channel, and then the maintenance cover is opened to enter the overflow channel for maintenance.

[0004] However, when the gate is damaged, water from the upstream reservoir enters the overflow channel, increasing the difficulty and risk of maintenance work. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes an inverted siphon overflow weir structure.

[0006] The utility model proposes an inverted siphon overflow weir structure, comprising a weir body, an overflow channel, an inspection channel and an inverted siphon pipe;

[0007] The weir body is arranged on the river bed;

[0008] The overflow channel runs through the weir body, and the water inlet and the outlet of the overflow channel are connected to the upstream water surface and the downstream water surface respectively;

[0009] The inspection channel is arranged on the weir body and communicates with the overflow channel;

[0010] The pipe body of the inverted siphon is arranged between the bottom of the weir body and the riverbed, and the water inlet and the water outlet of the inverted siphon are connected to the upstream water surface and the downstream water surface respectively.

[0011] An opening and closing module is arranged inside the tube body.

[0012] The opening and closing module includes a first gate and a pull rod;

[0013] The first gate is arranged inside the tube body;

[0014] One end of the pull rod is connected to the first gate; the other end passes through the weir body and is arranged on the top of the weir body.

[0015] A second gate is arranged in the overflow channel.

[0016] The number of the inverted siphons is multiple;

[0017] The pipe bodies of a plurality of inverted siphon pipes are arranged side by side between the bottom of the weir body and the riverbed.

[0018] The number of the overflow channels is multiple;

[0019] A plurality of overflow channels are arranged on the weir body in an array, side by side or in parallel.

[0020] The inverted siphon overflow weir structure also includes a gabion;

[0021] The gabion is arranged on the river bed and is at a preset distance from the weir body in the horizontal direction.

[0022] The inverted siphon overflow weir structure also includes geotextile;

[0023] The geotextile is arranged between the riverbed and the gabion.

[0024] The inverted siphon overflow weir structure also includes a concrete cushion layer;

[0025] The concrete cushion layer is arranged between the bottom of the weir body and the pipe body.

[0026] The thickness of the gabion in the inverted siphon overflow weir structure is 40 to 60 cm.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] (1) The utility model sets an inverted siphon between the bottom of the weir body and the riverbed, and connects the water inlet and outlet of the inverted siphon to the upstream and downstream water surfaces respectively. Before the overflow channel is inspected and repaired, the water in the upstream reservoir area can be drained by the inverted siphon, making the inspection and repair work more convenient and safer; furthermore, the inverted siphon can also be used to adjust the water level during the flood season to enhance the flood control capacity of the overflow weir;

[0029] (2) The utility model is provided with gates in both the overflow channel and the inverted siphon. Closing the gates during droughts can stabilize the water in the upstream reservoir area and provide water sources for agricultural irrigation and industrial production; rapid flood discharge during flood seasons can reduce the risk of weir collapse;

[0030] (3) The utility model arranges a gabion bottom protection on the riverbed within a preset range upstream and downstream of the weir body, and the gabion can filter the silt to prevent the silt from eroding the weir body. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a top view of the utility model;

[0032] Figure 2 It is a longitudinal sectional view of the utility model;

[0033] Figure 3 It is a longitudinal sectional view of Embodiment 1 of the present utility model;

[0034] Figure 4 It is a longitudinal sectional view of Embodiment 2 of the present utility model;

[0035] Figure 5 It is a longitudinal sectional view of embodiment 3 of the present utility model.

[0036] In the figure, 1 is the weir body; 2 is the revetment; 3 is the stepping stone; 4 is the gabion; 5 is the overflow channel; 6 is the second gate; 7 is the inspection cover; 8 is the inverted siphon; 9 is the pull rod; 10 is the riverbed; 11 is the concrete cushion layer; and 12 is the first gate. DETAILED DESCRIPTION

[0037] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0038] like Figure 1 As shown, the utility model proposes an inverted siphon overflow weir structure, including a weir body 1, an overflow channel 5, an inspection channel and an inverted siphon pipe 8;

[0039] The weir body 1 is arranged on the river bed 10;

[0040] Before constructing the weir body 1, the original riverbed within a certain range of the river channel upstream and downstream of the weir body 1 is cleaned to the construction elevation. The weir body 1 is prepared by concrete, reinforced concrete or mortared stone. The weir body 1 can be a straight weir or a toothed weir. The upstream and downstream slope ratios of the weir body 1 are both 1:3.

[0041] Preferably, the concrete grade is C25, the frost resistance grade is F200, and the water resistance grade is W6.

[0042] The mortar masonry uses M15 mortar to lay MU40 stones.

[0043] The weir body 1 is laterally connected to both sides of the river channel through revetments 2 to form an integral structure; a stepping stone 3 is arranged on the top of the weir body 1 for pedestrians to pass through.

[0044] The overflow channel 5 runs through the weir body 1 , and the water inlet of the overflow channel 5 is connected to the upstream water surface, and the discharge outlet is connected to the downstream water surface; a second gate 6 is provided in the overflow channel 5 .

[0045] In one embodiment, there are multiple overflow channels 5; the multiple overflow channels 5 are arranged on the weir body 1 in an array, side by side or in parallel.

[0046] The overflow channel 5 can be a culvert such as a cover culvert, a circular pipe culvert, an arch culvert, a cover culvert, a box culvert, or the like.

[0047] The inspection channel is arranged on the weir body 1 and communicated with the overflow channel 5; in one embodiment, the inspection entrance of the inspection channel starts at the top of the weir body 1, and an inspection cover plate 7 is provided at the inspection entrance.

[0048] like Figure 2 As shown, the body of the inverted siphon 8 is arranged between the bottom of the weir 1 and the riverbed 10, and the water inlet of the inverted siphon 8 is connected to the upstream water surface, and the water outlet is connected to the downstream water surface. The inverted siphon 8 can be any one of the shaft type, inclined pipe type, broken line type or bridge type.

[0049] The utility model sets an inverted siphon 8 between the bottom of the weir body 1 and the riverbed 10, and connects the water inlet and the outlet of the inverted siphon 8 to the upstream and downstream water surfaces respectively. Before the overflow channel 5 is inspected and repaired, the water in the upstream reservoir area can be drained by using the inverted siphon 8, making the inspection and repair work more convenient and safer; further, the inverted siphon 8 can also be used to adjust the water level during the flood season to enhance the flood control capacity of the overflow weir.

[0050] The interior of the pipe body is provided with an opening and closing module. Preferably, the opening and closing module is the first gate 12, and the first gate 12 and the second gate 6 can be electric gates, hydraulic gates or manual gates; the shapes of the first gate 12 and the second gate 6 can be plane gates, arc gates, arch gates or spherical gates; the materials of the first gate 12 and the second gate 6 can be PVC, steel gates or reinforced concrete gates.

[0051] The utility model provides gates in the overflow channel 5 and the inverted siphon 8. Closing the gates during drought can stabilize the water body in the upstream reservoir area and provide water for agricultural irrigation and industrial production; rapid flood discharge during flood season can reduce the risk of collapse of the weir body 1.

[0052] like Figure 3 As shown, in Example 1, the first gate 12 is a manual gate made of PVC material, and the opening and closing module includes the first gate 12 and a pull rod 9;

[0053] The first gate 12 is arranged inside the pipe body;

[0054] One end of the pull rod 9 is connected to the first gate 12 ; the other end passes through the weir body 1 and is arranged on the top of the weir body 1 .

[0055] In the utility model, one end of the pull rod 9 is connected to the first gate 12, and the other end passes through the weir body 1 and is arranged on the top of the weir body 1, so that construction workers can open and close the first gate 12 conveniently.

[0056] Optionally, there are multiple inverted siphon pipes 8; the pipe bodies of the multiple inverted siphon pipes 8 are arranged side by side between the bottom of the weir body 1 and the riverbed 10.

[0057] The inverted siphon 8 of the utility model is a concrete structure as a whole, and its water inlet and water outlet are both square, and the size is larger than the clearance of the inner wall of the lower structure, so as to facilitate water inlet and water outlet.

[0058] In such Figure 4 In the illustrated embodiment 2, the overflow channel 5 is a slab culvert, and a plurality of concrete slab culverts are arranged side by side along the weir body 1; a second gate 6 is provided upstream of the concrete slab culvert.

[0059] In Example 3, the concrete cover culvert runs through the entire weir body 1 and is a reinforced concrete structure with a square cross-section. A PVC gate is set in front of each culvert, which is opened and closed by hand. The inspection channel and the cover culvert share a channel. Figure 5 As shown, an inspection entrance is opened at a preset position where the cover culvert is connected to the top of the weir body 1, and an inspection cover 7 is arranged at the inspection entrance.

[0060] The utility model provides an inspection entrance on the connecting surface between the concrete cover culvert and the top of the weir body 1, which is convenient for construction personnel to enter and exit, and the inspection passage and the overflow passage 5 are the same passage, saving construction costs.

[0061] The inverted siphon overflow weir structure also includes a gabion 4;

[0062] The gabion 4 is arranged on the river bed 10 and is at a preset distance in the horizontal direction from the weir body 1. The thickness of the gabion 4 of the inverted siphon overflow weir structure is 40-60 cm, and preferably, the preset distance is 10-15 m.

[0063] The inverted siphon overflow weir structure also includes geotextile;

[0064] The geotextile is arranged between the riverbed 10 and the gabion 4 .

[0065] Preferably, the area of ​​the geotextile is 300g / ㎡.

[0066] The utility model arranges gabions 4 as a bottom protection on a riverbed 10 within a preset range upstream and downstream of a weir body 1. The gabions 4 can filter sediment to prevent the sediment from eroding the weir body 1. Furthermore, the geotextile has a similar function to the gabions 4. When water carrying sediment enters the geotextile, the geotextile can filter the sediment and only allow water to pass through, thereby reducing the erosion effect of the sediment on the weir body 1.

[0067] The inverted siphon overflow weir structure further includes a concrete cushion layer 11;

[0068] The concrete cushion layer 11 is arranged between the bottom of the weir body 1 and the pipe body.

[0069] In the utility model, a concrete cushion layer 11 is arranged between the bottom of the weir body 1 and the riverbed 10 , which is beneficial to maintaining the stability of the weir body 1 .

[0070] The process of using the utility model to regulate and overhaul the water flow in the river is as follows:

[0071] When the upstream water volume is lower than the preset value, the first gate 12 and the second gate 6 are closed to form a landscape water surface upstream, which can also be used for water replenishment and irrigation. When the water body elevation is higher than the overflow dam elevation, the water body overflows.

[0072] When the upstream water volume is greater than or equal to the preset value, in order to prevent flooding, the first gate 12 and the second gate 6 can be opened at the same time to achieve the effect of flood discharge. Preferably, the preset value is 30-50m.

[0073] When it is necessary to inspect the weir body 1, the first gate 12 can be opened to drain the reservoir area. The inspection cover plate 7 on the top of the weir body can be used for daily inspection and dredging at this position when blockage occurs.

[0074] Compared with the prior art, the utility model has the following beneficial effects:

[0075] (1) The utility model sets an inverted siphon between the bottom of the weir body and the riverbed, and connects the water inlet and outlet of the inverted siphon to the upstream and downstream water surfaces respectively. Before the overflow channel is inspected and repaired, the water in the upstream reservoir area can be drained by the inverted siphon, making the inspection and repair work more convenient and safer; furthermore, the inverted siphon can also be used to adjust the water level during the flood season to enhance the flood control capacity of the overflow weir;

[0076] (2) The utility model is provided with gates in both the overflow channel and the inverted siphon. Closing the gates during droughts can stabilize the water in the upstream reservoir area and provide water sources for agricultural irrigation and industrial production; rapid flood discharge during flood seasons can reduce the risk of weir collapse;

[0077] (3) The utility model arranges a gabion bottom protection on the riverbed within a preset range upstream and downstream of the weir body, and the gabion can filter the silt to prevent the silt from eroding the weir body.

[0078] The above are only a few embodiments of the present application, and are not intended to limit the present application in any form. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. An inverted siphon overflow weir structure, characterized in that: It includes weir body, overflow channel, inspection channel and inverted siphon; The weir body is arranged on the river bed; The overflow channel runs through the weir body, and the water inlet and the outlet of the overflow channel are connected to the upstream water surface and the downstream water surface respectively; The inspection channel is arranged on the weir body and communicates with the overflow channel; The pipe body of the inverted siphon is arranged between the bottom of the weir body and the riverbed, and the water inlet and the water outlet of the inverted siphon are connected to the upstream water surface and the downstream water surface respectively.

2. The inverted siphon overflow weir structure according to claim 1, characterized in that: An opening and closing module is arranged inside the tube body.

3. The inverted siphon overflow weir structure according to claim 2, characterized in that: The opening and closing module includes a first gate and a pull rod; The first gate is arranged inside the tube body; One end of the pull rod is connected to the first gate; the other end passes through the weir body and is arranged on the top of the weir body.

4. The inverted siphon overflow weir structure according to claim 1, characterized in that: A second gate is arranged in the overflow channel.

5. The inverted siphon overflow weir structure according to any one of claims 1 to 3, characterized in that: The number of the inverted siphons is multiple; The pipe bodies of a plurality of inverted siphon pipes are arranged side by side between the bottom of the weir body and the riverbed.

6. The inverted siphon overflow weir structure according to claim 1 or 4, characterized in that: The number of the overflow channels is multiple; A plurality of overflow channels are arranged on the weir body in an array, side by side or in parallel.

7. The inverted siphon overflow weir structure according to claim 1, characterized in that: Also includes gabions; The gabion is arranged on the river bed and is at a preset distance from the weir body in the horizontal direction.

8. The inverted siphon overflow weir structure according to claim 7, characterized in that: It also includes geotextiles; The geotextile is arranged between the riverbed and the gabion.

9. The inverted siphon overflow weir structure according to claim 1, characterized in that: It also includes a concrete pad; The concrete cushion layer is arranged between the bottom of the weir body and the pipe body.

10. The inverted siphon overflow weir structure according to claim 7, characterized in that: The thickness of the gabion is 40 to 60 cm.

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