Concrete longitudinal cofferdam structure capable of reducing height of closure embankment

Abstract

The utility model discloses a concrete longitudinal cofferdam structure capable of reducing the height of a closure embankment, which comprises a concrete longitudinal cofferdam, a drainage channel, a blocking gate, a blocking body, a main dam and the closure embankment, the drainage channel is arranged on the lower portion of the concrete longitudinal cofferdam and close to the main dam, the drainage channel penetrates through the concrete longitudinal cofferdam, and a fall is formed between the inlet end and the outlet end of the drainage channel; the blocking gate is arranged on the upstream side of the water inlet of the drainage channel; the plugging body is arranged in the concrete longitudinal cofferdam; the main dam and the closure embankment are located at the two ends of the concrete longitudinal cofferdam. Due to the fact that the drainage channel is additionally arranged on the concrete longitudinal cofferdam, water from the upstream flows out of the drainage channel during closure, and on the premise that closure requirements are met, the height of the embankment and closure difficulty are reduced, the closure construction period is shortened, and the closure investment is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic engineering, specifically relates to a concrete longitudinal cofferdam structure for reducing the height of closure dike. BACKGROUND

[0002] At present, with large-scale development of pumped storage power stations, the number of river dam construction has greatly increased.

[0003] When the river dam adopts an earth-rock dam, the diversion mode of once blocking the river bed and discharging through the permanent flood discharge emptying hole is adopted; when the river dam adopts a concrete gravity dam structure, if the diversion mode of once blocking the river bed and discharging through the newly-built diversion hole is adopted, the diversion engineering quantity and investment are large, the construction period of the diversion engineering is long, and it is not very economical;

[0004] Therefore, the staged diversion is generally adopted, but when the dam body flood discharge hole is high from the ground, the height of the closure dike is high when the dam body water discharge hole is used for diversion, and the closure construction is difficult. Therefore, it is urgent to design a concrete longitudinal cofferdam structure for reducing the height of the closure dike to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims to provide a concrete longitudinal cofferdam structure for reducing the height of the closure dike to solve the above problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A concrete longitudinal cofferdam structure for reducing the height of the closure dike, comprising a concrete longitudinal cofferdam, a discharge passage, a blocking gate, a blocking body, a main dam and a closure dike.

[0008] The discharge passage is arranged at the lower part of the concrete longitudinal cofferdam and close to the main dam, penetrates the concrete longitudinal cofferdam, and the inlet end and the outlet end of the discharge passage form a drop.

[0009] The blocking gate is arranged on the upstream side of the water inlet of the discharge passage.

[0010] The blocking body is arranged in the interior of the concrete longitudinal cofferdam.

[0011] The main dam and the closure dike are located at the two ends of the concrete longitudinal cofferdam.

[0012] As a preferred scheme of the utility model, the shape of the discharge passage is one of a square, a rectangle or a circle.

[0013] As a preferred scheme of the utility model, the slope of the discharge passage is i, and i is a flat slope or a regular slope.

[0014] As the preferred scheme of the utility model, the size of the inlet to the outlet of the flow discharge channel is constant or reduced.

[0015] As the preferred scheme of the utility model, the number of the flow discharge channels is one or more.

[0016] As the preferred scheme of the utility model, the plugging gate adopts concrete or steel structure.

[0017] As the preferred scheme of the utility model, the structure form of the plugging gate is a flat gate or a flap gate.

[0018] As the preferred scheme of the utility model, the length of the plugging body can be partial or complete.

[0019] In the above technical scheme, the utility model provides a concrete longitudinal cofferdam structure for reducing the height of a closure dike, which has the beneficial effects that:

[0020] The utility model adds a flow discharge channel on the concrete longitudinal cofferdam, and when the closure construction is carried out, the water flow is discharged to the downstream from the flow discharge channel, the water retaining depth and the seepage pressure of the closure dike are reduced, the difficulty of the closure construction is reduced, and therefore the closure construction is more efficient and of high quality, and the closure construction period is shortened. DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.

[0022] Figure 1 An angle structure perspective view is provided for the concrete longitudinal cofferdam structure for reducing the height of a closure dike embodiment of the utility model.

[0023] Figure 2 Another angle structure perspective view is provided for the concrete longitudinal cofferdam structure for reducing the height of a closure dike embodiment of the utility model.

[0024] Figure 3 A structure longitudinal section view is provided for the concrete longitudinal cofferdam structure for reducing the height of a closure dike embodiment of the utility model.

[0025] Figure 4 A structure transverse section view is provided for the concrete longitudinal cofferdam structure for reducing the height of a closure dike embodiment of the utility model.

[0026] 1, concrete longitudinal cofferdam; 2, flow discharge channel; 3, blocking gate; 4, blocking body; 5, main dam; 6, intercepting dike. DETAILED DESCRIPTION

[0027] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below with reference to the drawings.

[0028] As Figures 1-4 shown, the utility model embodiment provides a kind of concrete longitudinal cofferdam structure for reducing the height of intercepting dike, including concrete longitudinal cofferdam 1, still including flow discharge channel 2, blocking gate 3, blocking body 4, main dam 5, intercepting dike 6;Flow discharge channel 2 is set in the lower part of concrete longitudinal cofferdam 1 and is close to the position of main dam 5, flow discharge channel 2 penetrates concrete longitudinal cofferdam, and the inlet end and the outlet end of flow discharge channel 2 form the difference;Blocking gate 3 is set in the upstream side of the water inlet of flow discharge channel 2;Blocking body 4 is set in the inside of concrete longitudinal cofferdam 1;Main dam 5 and intercepting dike 6 are located at the two ends of concrete longitudinal cofferdam 1.

[0029] Example one

[0030] With reference to Figures 1-4 the concrete longitudinal cofferdam structure for reducing the height of intercepting dike shown in the figure, including concrete longitudinal cofferdam 1, still including flow discharge channel 2, blocking gate 3, blocking body 4, main dam 5, intercepting dike 6;Flow discharge channel 2 is set in the lower part of concrete longitudinal cofferdam 1 and is close to the position of main dam 5, flow discharge channel 2 penetrates concrete longitudinal cofferdam, and the inlet end and the outlet end of flow discharge channel 2 form the difference;Blocking gate 3 is set in the upstream side of the water inlet of flow discharge channel 2;Blocking body 4 is set in the inside of concrete longitudinal cofferdam 1;Main dam 5 and intercepting dike 6 are located at the two ends of concrete longitudinal cofferdam 1.

[0031] In actual intercepting construction, water flow is discharged from flow discharge channel 2 to downstream, so as to achieve the purpose of reducing upstream water level and intercepting difficulty.

[0032] On the basis of better realizing the reduction of upstream water level and intercepting difficulty, the utility model also effectively reduces investment.

[0033] Example two

[0034] With reference to Figures 1-4 the concrete longitudinal cofferdam structure for reducing the height of intercepting dike shown in the figure, on the basis of example one, the shape of flow discharge channel 2 is one of square, rectangle or circle.

[0035] In actual use, the shape of flow discharge channel 2 is determined according to the connection of upstream and downstream channels or pipelines, and the discharge hydraulic calculation result.The shape of flow discharge channel 2 is square, rectangle or circle, and other shapes can also be selected.

[0036] Example three:

[0037] Referring to Figure 3 A concrete longitudinal cofferdam structure for reducing the height of a closure dike, based on example one, the size of the discharge passage 2 from the inlet to the outlet is unchanged or reduced.

[0038] In actual use, the size of the discharge passage 2 from the inlet to the outlet is unchanged or reduced.

[0039] When the normal water retaining level of the concrete longitudinal cofferdam 1 is not high after the closure construction is completed, the water pressure borne by the blocking body 4 is small, at this time the size of the discharge passage 2 from the inlet to the outlet is unchanged or reduced;

[0040] When the normal water retaining level of the concrete longitudinal cofferdam 1 is high after the closure construction is completed, the water pressure borne by the blocking body 4 is large, in order to ensure the stability and safety of the blocking body structure, the size of the discharge passage 2 from the inlet to the outlet is reduced.

[0041] Example four:

[0042] Referring to Figures 1-2 A concrete longitudinal cofferdam structure for reducing the height of a closure dike, based on example one, the material of the blocking gate 3 is concrete or steel structure.

[0043] In actual use, the material of the blocking gate 3 is determined according to the structure size, service life, use environment and water pressure borne. The material of the blocking gate 3 is concrete or steel structure.

[0044] Example five:

[0045] Referring to Figures 1-2 A concrete longitudinal cofferdam structure for reducing the height of a closure dike, based on example one: the structure type of the blocking gate 3 is a flat gate or a flap gate.

[0046] In actual use, the structure type of the blocking gate 3 is determined according to the structure size, sealing requirement, water pressure borne and installation condition. The structure type of the blocking gate 3 is a flat gate or a flap gate, and other structure types can also be selected.

[0047] Example six:

[0048] Referring to Figures 2-3 A concrete longitudinal cofferdam structure for reducing the height of a closure dike, based on example one: the length of the blocking body 4 can be partial or complete.

[0049] In actual use, the length of the blocking body 4 is determined according to the structure calculation. The length of the blocking body 4 can be partial or complete.

[0050] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0051] In the case of no conflict, the skilled in the art can combine the technical features related in the above examples according to the actual situation to achieve the corresponding technical effects, and the specific combinations are not described one by one here.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0053] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A concrete longitudinal cofferdam structure for reducing the height of a closure dam, comprising a concrete longitudinal cofferdam (1), characterized in that, It also comprises a discharge channel (2), a blocking gate (3), a blocking body (4), a main dam (5), and a cut-off dike (6). The discharge channel (2) is arranged at the lower part of the concrete longitudinal cofferdam (1) and close to the main dam (5), and the inlet end and the outlet end of the discharge channel (2) form a fall. The blocking gate (3) is arranged on the upstream side of the water inlet of the discharge channel (2). The blocking body (4) is arranged inside the concrete longitudinal cofferdam (1). The main dam (5) and the cut-off dike (6) are located at the two ends of the concrete longitudinal cofferdam (1).

2. The concrete longitudinal cofferdam structure for reducing the height of the closure dam according to claim 1, characterized in that, The shape of the discharge channel (2) is one of a square, a rectangle, or a circle.

3. The concrete longitudinal cofferdam structure for reducing the height of the closure dam according to claim 1, characterized in that, The slope of the discharge channel (2) is i, and i is a flat slope or a regular slope with a slope greater than or equal to 0.

4. The concrete longitudinal cofferdam structure of claim 1, wherein, The size of the inlet to the outlet of the discharge channel (2) is constant or decreasing.

5. The concrete longitudinal cofferdam structure of claim 1, wherein, The number of the discharge channels (2) is one or more.

6. The concrete longitudinal cofferdam structure of claim 1, wherein, The blocking gate (3) is made of concrete or steel structure.

7. The concrete longitudinal cofferdam structure of claim 1, wherein, The structure of the blocking gate (3) is a flat gate or a flap gate.

8. The concrete longitudinal cofferdam structure of claim 1, wherein, The length of the blocking body (4) can be partial or complete.

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