Tunnel structure combining diversion, water delivery, emptying and ecological discharge

Abstract

The utility model relates to a tunnel structure combining diversion, water delivery, emptying and ecological discharge. The method is suitable for the technical field of water conservancy and hydropower engineering. According to the technical scheme, the tunnel structure combining flow guiding, water conveying, emptying and ecological discharging is characterized by comprising a flow guiding tunnel, the first end of the flow guiding tunnel is located on the upstream of a dam, and the second end of the flow guiding tunnel is located on the downstream of the dam; the water intake tower is arranged at the first end of the diversion tunnel, at least two water intake ports located at different heights are formed in the water intake tower, and the water intake ports are provided with water intake gates; the concrete plug is arranged in the diversion tunnel and can be used for plugging the diversion tunnel, and a pressure steel pipe communicated with the upstream and the downstream of the plug is arranged in the plug; at least part of the water conveying steel pipe is located in the diversion tunnel on the downstream side of the concrete plug, and a water inlet of the water conveying steel pipe communicates with the pressure steel pipe in the concrete plug; the blow-down pipe is connected to the water conveying steel pipe and is provided with a control valve; and the ecological drainage pipe is connected to the blow-down pipe and is provided with a control valve.

Description

Technical Field

[0001] The utility model relates to a tunnel structure combining diversion, water delivery, emptying and ecological discharge, and is applicable to the field of water conservancy and hydropower engineering. Background Art

[0002] In water conservancy and hydropower projects, in order to arrange pipelines for other functions such as reservoir emptying and ecological discharge, it is generally necessary to excavate underground caverns, which increases project costs.

[0003] Conventional hydropower stations usually choose a single fixed water intake in the reservoir. When the water level fluctuates, this type of water intake may draw water from the bottom or top of the water body with poor water quality, and the water quality of the city's water supply cannot be guaranteed. Summary of the invention

[0004] The technical problem to be solved by the utility model is: in view of the above-mentioned existing problems, a tunnel structure combining diversion, water delivery, emptying and ecological discharge is provided.

[0005] The technical solution adopted by the utility model is: a tunnel structure combining diversion, water delivery, emptying and ecological discharge, characterized in that it includes:

[0006] a diversion tunnel having a first end located upstream of the dam and a second end located downstream of the dam;

[0007] A water intake tower is arranged at the first end of the diversion tunnel, and the water intake tower is provided with at least two water intakes located at different heights, and the water intakes are equipped with water intake gates;

[0008] A concrete plug is arranged in the diversion tunnel and can be used to block the diversion tunnel. A pressure steel pipe connecting the upstream and downstream is arranged in the plug;

[0009] A water delivery steel pipe, at least part of which is located in the diversion tunnel on the downstream side of the concrete plug, and the water inlet of the water delivery steel pipe is connected to the pressure steel pipe in the concrete plug;

[0010] A vent pipe connected to the water delivery steel pipe and equipped with a control valve;

[0011] The ecological drainage pipe is connected to the vent pipe and is equipped with a control valve.

[0012] The interior of the water intake tower is divided into a water intake chamber and a water outlet chamber by a layered water intake gate mechanism. A water inlet is provided on the side wall of the water intake tower corresponding to the water intake chamber, and a water outlet is provided on the bottom plate of the water intake tower corresponding to the water outlet chamber.

[0013] The stratified water intake gate mechanism comprises a first concrete retaining wall arranged above the bottom plate of the water intake tower, a first concrete platform is arranged on the top of the first concrete retaining wall, a first water intake port communicating with the water inlet chamber and the water outlet chamber is arranged on the first concrete retaining wall, and a first water intake gate is arranged corresponding to the first water intake port;

[0014] A second concrete retaining wall is provided above the first concrete platform, a second concrete platform is provided on the top of the second concrete retaining wall, a second water inlet connecting the water inlet chamber and the water outlet chamber is provided on the second concrete retaining wall, and a second water inlet gate is provided corresponding to the second water inlet;

[0015] A third concrete retaining wall is arranged above the second concrete platform. A third water intake connecting the water inlet chamber and the water outlet chamber is arranged on the third concrete retaining wall. A third water intake gate is arranged corresponding to the third water intake.

[0016] A hoisting and shutting machine room is arranged on the top of the water intake tower, and a hoisting and shutting machine is arranged in the hoisting and shutting machine room corresponding to each water intake gate.

[0017] The bottom plate elevation of the water intake tower is determined by the requirements of minimum flooding depth and silt deposition elevation.

[0018] A sand barrier is arranged in front of the water inlet of the water inlet tower, and the water inlet is connected to the open channel in front of the diversion tunnel.

[0019] A trash rack is arranged in front of the water inlet of the water inlet tower.

[0020] The concrete plug is provided with a water stop ring and a thrust ring, and curtain grouting, consolidation grouting and backfill grouting are performed on the plug.

[0021] The concrete plug is arranged corresponding to the dam curtain line.

[0022] The beneficial effects of the utility model are as follows: the utility model utilizes the diversion tunnel to lay out the water delivery steel pipe, and connects the vent pipe and the ecological leakage pipe to the water delivery steel pipe, thereby realizing the integration of the "four pipes" of the diversion tunnel, the water delivery pipe, the vent pipe and the ecological leakage pipe, and controls the corresponding pipelines through various valves, fully utilizes the diversion tunnel body, leads out branch pipes in the lower half of the tunnel, reduces the construction difficulty, reduces the engineering excavation volume, and saves engineering investment.

[0023] In the utility model, a water inlet tower is arranged at the water inlet of the diversion tunnel, and at least two water intakes located at different heights are arranged on the water inlet tower, so as to realize a tower-type layered water intake type, improve the water intake quality, and ensure the urban water supply.

[0024] The utility model combines the diversion tunnel with the ecological spillway arrangement to avoid setting bottom hole diversion at the low elevation part of the dam body, thereby maintaining the downstream river ecology. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1Schematic diagram of the plan layout of the embodiment.

[0026] Figure 2 It is a cross-sectional view of the water inlet tower in the embodiment.

[0027] Icons: 1- diversion tunnel; 2- water supply steel pipe; 3- vent pipe; 4- ecological spillway; 5- water intake tower; 6- maintenance valve; 7- control valve; 8- concrete plug; 9- dam; 10- opening and closing machine room; 11- ladder; 12- third water intake; 13- second water intake; 14- first water intake. DETAILED DESCRIPTION

[0028] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0031] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0033] This embodiment provides a tunnel structure that combines diversion, water delivery, venting, and ecological discharge, including: a diversion tunnel, a water intake tower, a concrete plug, a water delivery steel pipe, a venting pipe, and an ecological discharge pipe.

[0034] In this case, the diversion tunnel is a diversion facility during dam construction. The first end of the diversion tunnel is located upstream of the dam, and the second end of the diversion tunnel is located downstream of the dam. A water intake tower is set at the first end of the diversion tunnel, and the water outlet of the water intake tower is connected to the diversion tunnel. The water intake tower is provided with three water intakes at different heights, and the water intakes are equipped with water intake gates. A hoisting and shutting machine room is set on the top of the water intake tower, and hoists are set in the hoisting and shutting machine room corresponding to each water intake gate.

[0035] In this embodiment, a concrete plug is provided in the diversion tunnel at the position corresponding to the dam curtain line, the concrete plug blocks the diversion tunnel, and a pressure steel pipe connecting the upstream and downstream thereof is provided in the plug. A water delivery steel pipe is provided in the diversion tunnel on the downstream side of the concrete plug, the water inlet end of the water delivery steel pipe is connected to the downstream end of the pressure steel pipe in the plug, and the water outlet end of the water delivery steel pipe is connected to the water supply network of the town after being led out from the second end of the diversion tunnel.

[0036] In this example, a branch pipe is branched off from the water delivery steel pipe section outside the diversion tunnel to serve as the reservoir's drain pipe, and a control valve is installed; a branch pipe is branched off from the drain pipe to serve as an ecological discharge pipe, and a control valve is installed.

[0037] In this embodiment, the "four pipes" of the diversion tunnel, water pipe, vent pipe and ecological discharge pipe are combined into one, making full use of the diversion tunnel body, and leading out branch pipes in the lower half of the tunnel, which reduces the construction difficulty, reduces the amount of engineering excavation, and saves engineering investment.

[0038] In this embodiment, a tower-type layered water intake type is realized through multiple water intakes at different heights, and the height of the water intake can be adjusted according to the water level, thereby improving the water intake quality and ensuring urban water supply.

[0039] In some specific embodiments, the interior of the water inlet tower is divided into a water inlet chamber and a water outlet chamber by a layered water intake gate mechanism. A water inlet is provided on the side wall of the water inlet tower corresponding to the water inlet chamber, and a water outlet is provided on the bottom plate of the water inlet tower corresponding to the water outlet chamber.

[0040] In this example, the stratified water intake gate mechanism has a first concrete retaining wall arranged above the bottom plate of the water intake tower, the top of the first concrete retaining wall is connected to the first concrete platform on the downstream side, the first concrete retaining wall is provided with a first water intake port connecting the water inlet chamber and the water outlet chamber, and a first water intake gate is provided corresponding to the first water intake port.

[0041] In this embodiment, a second concrete retaining wall is provided above the downstream side of the first concrete platform, a second concrete platform is provided on the top of the second concrete retaining wall, a second water intake connecting the water inlet chamber and the water outlet chamber is provided on the second concrete retaining wall, and a second water intake gate is provided corresponding to the second water intake.

[0042] In this embodiment, a third concrete retaining wall is provided above the downstream side of the second concrete platform. A third water intake connecting the water inlet chamber and the water outlet chamber is provided on the third concrete retaining wall, and a third water intake gate is provided corresponding to the third water intake.

[0043] In this embodiment, the layered water intake gate mechanism is arranged in a stepped shape, and the first, second and third water intakes correspond to different steps respectively, so that the first, second and third water intakes are at different heights and different positions in the horizontal direction without interfering with each other.

[0044] In some specific embodiments, the bottom plate elevation of the water intake tower is determined by the requirements of the minimum flooding depth and the silt deposition elevation.

[0045] In some specific embodiments, a sand barrier is provided in front of the water inlet of the water intake tower, and the water inlet is connected to the open channel in front of the diversion tunnel, which is combined as a measure to prevent sedimentation and siltation during operation.

[0046] In some specific embodiments, a trash rack is arranged in front of the water inlet of the water inlet tower, and the trash rack is arranged from the bottom plate of the water inlet tower to the top of the tower.

[0047] In some specific embodiments, the concrete plug is provided with a water stop ring and a thrust ring, and the plug is subjected to curtain grouting, consolidation grouting and backfill grouting.

[0048] In some specific embodiments, the construction method of the tunnel structure combined with diversion, water delivery, emptying, and ecological release includes the following steps:

[0049] a. Before the dam construction, the diversion tunnel is excavated.

[0050] b. An intake tower is arranged on one side of the diversion tunnel inlet. The intake tower adopts a tower-type layered water intake type. The earthwork excavation of the intake tower is carried out simultaneously with the excavation of the diversion tunnel inlet.

[0051] A sand barrier is set up in front of the water intake tower, and the water intake is connected to the open channel in front of the diversion tunnel, which is combined as a measure to prevent sedimentation during operation. The tower structure and the traffic bridge on the top of the tower are combined with the horseway excavated on the slope. The traffic bridge on the top of the tower is connected to the dam top road as a permanent traffic channel for the water intake tower.

[0052] c. A concrete plug is installed in the diversion tunnel at the location corresponding to the dam curtain line. The diversion tunnel on the upstream side of the plug is lined with reinforced concrete. A pressure steel pipe is buried in the plug. The plug is connected to a water supply steel pipe. The steel pipe in the diversion tunnel is laid openly in the holes of anchor piers and support piers.

[0053] A vent pipe is led out from the water supply steel pipe and controlled by a control valve; an ecological leakage pipe is led out from the vent hole pipeline and the leakage flow is controlled by a control valve.

[0054] The concrete plug is equipped with a water stop ring and a thrust ring, and the plug is subjected to curtain grouting, consolidation grouting and backfill grouting. The plug is connected to a water delivery steel pipe, and a maintenance valve is installed on the steel pipe section. The steel pipe from the plug to the tunnel exit is sealed with an external concrete wrap.

[0055] In this embodiment, the top arch and side wall of the tunnel Class III surrounding rock section are supported by system anchor spraying; the top arch and side wall of Class IV surrounding rock are equipped with steel arch frames and system anchor spraying support; before excavation of Class V surrounding rock, a small duct for advanced grouting is installed, and the top arch and side wall are equipped with steel arch frames and system anchor spraying support. In order to increase the integrity of the rock mass and improve the bearing capacity of the rock mass, consolidation grouting treatment is carried out on the entire tunnel section. Concrete filling is used between the steel lining and the surrounding rock, backfill grouting treatment is adopted in the range of the tunnel top arch, and contact grouting treatment is adopted between the steel lining and the bottom of the backfill concrete.

[0056] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 tunnel structure combining diversion, water delivery, venting and ecological release, characterized in that: include: a diversion tunnel having a first end located upstream of the dam and a second end located downstream of the dam; A water intake tower is arranged at the first end of the diversion tunnel, and the water intake tower is provided with at least two water intakes located at different heights, and the water intakes are equipped with water intake gates; A concrete plug is arranged in the diversion tunnel and can be used to block the diversion tunnel. A pressure steel pipe connecting the upstream and downstream is arranged in the plug; A water delivery steel pipe, at least part of which is located in the diversion tunnel on the downstream side of the concrete plug, and the water inlet of the water delivery steel pipe is connected to the pressure steel pipe in the concrete plug; A vent pipe connected to the water delivery steel pipe and equipped with a control valve; The ecological drainage pipe is connected to the vent pipe and is equipped with a control valve.

2. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 is characterized by: The interior of the water intake tower is divided into a water intake chamber and a water outlet chamber by a layered water intake gate mechanism. A water inlet is provided on the side wall of the water intake tower corresponding to the water intake chamber, and a water outlet is provided on the bottom plate of the water intake tower corresponding to the water outlet chamber. The stratified water intake gate mechanism comprises a first concrete retaining wall arranged above the bottom plate of the water intake tower, a first concrete platform is arranged on the top of the first concrete retaining wall, a first water intake port communicating with the water inlet chamber and the water outlet chamber is arranged on the first concrete retaining wall, and a first water intake gate is arranged corresponding to the first water intake port; A second concrete retaining wall is provided above the first concrete platform, a second concrete platform is provided on the top of the second concrete retaining wall, a second water inlet connecting the water inlet chamber and the water outlet chamber is provided on the second concrete retaining wall, and a second water inlet gate is provided corresponding to the second water inlet; A third concrete retaining wall is arranged above the second concrete platform. A third water intake connecting the water inlet chamber and the water outlet chamber is arranged on the third concrete retaining wall. A third water intake gate is arranged corresponding to the third water intake.

3. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 or 2, characterized in that: A hoisting and shutting machine room is arranged on the top of the water intake tower, and a hoisting and shutting machine is arranged in the hoisting and shutting machine room corresponding to each water intake gate.

4. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 or 2, characterized in that: The bottom plate elevation of the water intake tower is determined by the requirements of minimum flooding depth and silt deposition elevation.

5. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 or 2, characterized in that: A sand barrier is arranged in front of the water inlet of the water inlet tower, and the water inlet is connected to the open channel in front of the diversion tunnel.

6. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 or 2, characterized in that: A trash rack is arranged in front of the water inlet of the water inlet tower.

7. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 is characterized by: The concrete plug is provided with a water stop ring and a thrust ring, and curtain grouting, consolidation grouting and backfill grouting are performed on the plug.

8. The tunnel structure combining diversion, water delivery, venting and ecological release according to claim 1 is characterized by: The concrete plug is arranged corresponding to the dam curtain line.

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