Connection platform and water inlet tower group of super-large-discharge flood discharge tunnel

Abstract

The utility model provides a connection platform and an ultra-large-discharge flood discharge tunnel intake tower group. The connection platform and the ultra-large-discharge flood discharge tunnel intake tower group sequentially comprise foundation concrete and structural concrete from bottom to top. Structural concrete is arranged on foundation concrete, the height of the top of the structural concrete is the same as that of a water inlet tower, a portal crane track beam is embedded in the top of the structural concrete, a beam system structure is replaced with a solid concrete structure to bear large loads of portal crane tracks, and the portal crane operation requirement is met. A door storage chamber is arranged in the structural concrete and used for containing the accident access door under the non-temporary water retaining working condition. The connection platform achieves efficient connection of the flood discharge tunnel water inlet tower group and supports arrangement of ultra-large discharge capacity and concentrated loads, the service life of the access door is prolonged through the arrangement of the door storage base, the operation and maintenance management difficulty and the safety risk of the accident access door are reduced, and the overall shock resistance of the water inlet tower group is improved to a certain extent through the entity connection structure. The tower group stress condition is improved through optimization design, and the engineering construction cost of the contact platform is saved.

Description

Technical Field

[0001] The utility model relates to the field of water conservancy projects, in particular to a connection platform and a super-large discharge flood discharge tunnel water intake tower group. Background Art

[0002] The spillway is a very important bank discharge structure in the water conservancy and hydropower hub project. For the tunnel group with a large total discharge volume and multiple spillway tunnels for common discharge, affected by the geological and topographic conditions, hub layout pattern, hydraulic conditions, discharge volume requirements and flood discharge energy dissipation, the layout schemes of the spillway group are diverse, and the more common ones are single-side centralized layout and left and right bank distribution layout. Regardless of single-side centralized layout or left and right bank distribution layout, due to the discharge volume demand, the number of caverns arranged reaches 2 or more, and the upstream inlet is often equipped with a water intake tower group, so that an emergency maintenance door can be set in the tower to meet the temporary water retaining maintenance working conditions of the spillway, and provide conditions for the maintenance of the cavern or working gate and gate slot. The size or load of the emergency maintenance door in the tower body is closely related to the single hole discharge volume and structural size of the spillway, and the load of the emergency maintenance door affects the design of the connection structure between the tower bodies.

[0003] In actual engineering construction, according to the layout characteristics of the water intake tower group, the design and operation mode of the emergency inspection door in the tower body are diverse. When the distance between tower bodies is large and each tower body is relatively independent, a rack structure is often used as the force-bearing structure for the opening and closing of the emergency inspection door. The disadvantage of this design is that each tower body needs to be designed with a set of rack structures and operation and opening and closing systems. When the number of tower groups is large, the project investment increases significantly, and the inspection door is hung in the door slot for a long time during operation, and the opening and closing equipment or support beams bear the force for a long time, which places high requirements on operation and maintenance management.

[0004] In the case where the distance between tower bodies is small and one gantry crane can be shared between tower bodies for opening and closing of accident inspection doors, a gantry crane track beam is often used to connect the water inlet tower so that the gantry crane can switch between different tower bodies. This design is limited by the distance between tower bodies and the load limit of the gantry crane track. The beam system structure is not suitable for large spans and large loads. That is, when the gantry crane load is too large, even prestressed beams cannot meet the gantry crane operation requirements. The size of the gantry crane load depends on the size of the inspection door, and there are upper limits on the single-hole discharge and orifice size of the flood discharge tunnel. Similarly, the inspection door during operation is also hung in the door slot for a long time, and the operation and maintenance management requirements are high. Utility Model Content

[0005] The main purpose of the utility model is to provide a connection platform for connecting a group of water intake towers of super-large discharge flood discharge tunnels, hoping to effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A connection platform connecting a super-large-discharge flood discharge tunnel water intake tower group, wherein the connection platform connecting the super-large-discharge flood discharge tunnel water intake tower group comprises foundation concrete and structural concrete in order from bottom to top;

[0008] Structural concrete is provided on the foundation concrete, and the top height of the structural concrete is the same as that of the water intake tower. A gantry crane track beam is buried in the top of the structural concrete. The solid concrete structure replaces the beam structure to bear the larger load of the gantry crane track, thereby meeting the gantry crane operation requirements; a door storage warehouse is provided in the structural concrete, and the door storage warehouse is used to accommodate accident maintenance doors in non-temporary water retaining conditions.

[0009] While adopting the above technical solutions, the present invention can also adopt or combine the following technical solutions:

[0010] As a preferred technical solution of the utility model: a pressure equalization channel is provided at the junction of the foundation concrete and the structural concrete, and the pressure equalization channel is used to connect the upstream reservoir water and the pool water between the tower bodies.

[0011] As a preferred technical solution of the utility model: an inclined section is arranged on the flat pressure channel.

[0012] As a preferred technical solution of the utility model: a traffic corridor connecting the hoisting and shutting machine rooms of adjacent water inlet towers is provided in the foundation concrete.

[0013] As a preferred technical solution of the utility model: a drainage ditch is provided in the traffic corridor, and the drainage ditch is connected to the flood discharge tunnel.

[0014] As a preferred technical solution of the utility model: a ladder is provided on the side wall of the storage door storehouse.

[0015] As a preferred technical solution of the utility model: a water collection pit is provided at the bottom of the storage door.

[0016] As a preferred technical solution of the utility model: a drainage pipe is provided in the structural concrete and foundation concrete below the sump, one end of the drainage pipe is connected to the sump, and the other end of the drainage pipe is connected to the traffic corridor.

[0017] As an optimal technical solution of the utility model: the super-large discharge flood tunnel water intake tower group has multiple connection platforms connecting the super-large discharge flood tunnel water intake tower group as described above, and the connection platform is arranged between two adjacent super-large discharge flood tunnel water intake towers and is used to connect two adjacent super-large discharge flood tunnel water intake towers.

[0018] The utility model provides a connection platform and a group of water intake towers for a super-large discharge flood tunnel, which have the following beneficial effects: through a plurality of connection platforms connecting the group of water intake towers for a super-large discharge flood tunnel, the connection between the water intake towers for a super-large discharge, a large orifice, a large gate machine track load, and a concentrated arrangement can be effectively achieved; the connection platform also serves as a maintenance door storage door warehouse, forming a comprehensive operation management system of one door machine, multiple tower body door slots, and multiple storage door warehouses, saving project investment, reducing the difficulty and safety risk of operation and maintenance management of accident maintenance doors, and at the same time, it can also reduce the impact of water flow on the maintenance door hung in the door slot for a long time, prolonging the service life of the maintenance door to a certain extent, and avoiding the safety hazard of the door slot possibly falling; in addition, the structure of the physical connection improves the overall seismic resistance of the water intake tower group to a certain extent; the design of the equalization channel and the traffic corridor improves the stress conditions of the tower group, saves the project investment of the connection platform, and improves the efficiency of operation and maintenance management. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a group of super-large-discharge flood discharge tunnel intake towers with multiple connection platforms;

[0020] Figure 2 A three-dimensional diagram of a connection platform for connecting a group of water intake towers of a super-large discharge flood discharge tunnel provided by the utility model;

[0021] Figure 3 Main view section view;

[0022] Figure 4 It is a side cross-sectional view;

[0023] Figure 5 It is a cross-sectional view of the flat pressure channel;

[0024] Figure 6 It is a cross-section diagram of the traffic corridor;

[0025] In the figure: 1-foundation concrete; 2-structural concrete; 3-storage gate; 4-pressure leveling channel; 5-traffic corridor; 6-ladder; 7-sump; 8-drainage pipe; 51-drainage ditch. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-6As shown, a connection platform connecting a group of water intake towers of super-large discharge flood discharge tunnels, the foundation of the connection platform is located on the bedrock surface, the bedrock surface is partially excavated into a step-like shape with three sides facing the air, forming a bedrock partition pier between the tower bodies, which includes foundation concrete 1 and structural concrete 2 from bottom to top; structural concrete 2 is provided on the foundation concrete 1, and the top height of the structural concrete 2 is the same as that of the water intake tower. The solid concrete structure replaces the beam structure to bear the larger load of the gantry track, meeting the requirements of gantry operation; a gantry track beam is buried on the top of the structural concrete 2, and a door storage warehouse 3 is provided in the structural concrete 2. The door storage warehouse 3 is used to accommodate an accident maintenance door in a non-temporary water retaining condition. The structural concrete 2 is provided with a door storage warehouse 3, and the line connecting the door storage warehouse 3 and the accident maintenance door slot of the water intake tower is parallel to the gantry track and is located at the center of the two gantry track track lines.

[0028] Base concrete 1 uses C 90 25 concrete pouring, structural concrete 2 uses C 90 30 concrete pouring, the span is 23.25m.

[0029] The emergency inspection door is placed in the door reservoir 3 when it is not in temporary water blocking condition. When the emergency inspection door needs to be temporarily water blocked, the door is lifted from the door reservoir 3 to the emergency inspection door slot by a gantry crane and lowered to the orifice for water blocking. The horizontal section structure of the door reservoir 3 is exactly the same as the emergency inspection door slot of the water intake tower, which is 17.4m long, 4.15m wide and 16m high.

[0030] A pressure-equalizing channel 4 is provided at the junction of the foundation concrete 1 and the structural concrete 2, which is used to connect the upstream reservoir water and the pool water between the tower bodies, achieve water pressure balance, improve the stress conditions of the tower body, and save the amount of concrete engineering for the connection platform; the pressure-equalizing channel 4 has a gate-shaped cross-section, with a width of 5m, a side wall height of 3.5m, a top arch radius of 2.5m, a central angle of 180°, and a slope ratio of 1:3.24 in the direction of the water flow.

[0031] The connection platform is not connected to the reservoir bank, but only to the tower body. It forms a connecting pool with the reservoir bank and the tower body. By designing a pressure-equalizing channel on the connection platform, it forms a connecting vessel with the upstream reservoir to balance the water pressure between the tower bodies and the upstream and downstream of the connection platform, improve the stress conditions of the tower group, and save the concrete engineering volume of the connection platform.

[0032] A traffic corridor 5 connecting the adjacent water intake tower hoist room is provided in the foundation concrete 1, so as to realize convenient traffic and facilitate operation and maintenance management. A drainage ditch 51 is provided in the traffic corridor 5, and the drainage ditch 51 is connected to the flood discharge tunnel. The cross section of the traffic corridor 5 is a city gate tunnel type, with a width of 2.2m, a side wall height of 1.7m, a top arch radius of 1.46m, and a central angle of 97.78°.

[0033] A ladder 6 is provided on the side wall of the storage door storehouse 3 for personnel to enter the storage door storehouse 3 to inspect and maintain the inspection door.

[0034] A sump 7 is provided at the bottom of the reservoir 3 for collecting rainfall and rainwater in the reservoir. The elevation of the sump 7 is 1m lower than that of the reservoir 3. The sump 7 is 5m long and 4.15m wide.

[0035] A drainage pipe 8 is provided in the structural concrete 2 and the foundation concrete 1 below the sump 7 . One end of the drainage pipe 8 is connected to the sump 7 , and the other end of the drainage pipe 8 is connected to the traffic corridor 5 .

[0036] The above-mentioned specific implementation methods are used to explain the present invention and are only preferred embodiments of the present invention, rather than limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A connection platform for connecting a group of water intake towers of a super-large discharge flood discharge tunnel, characterized in that: The connection platform connecting the super-large-discharge flood discharge tunnel water intake tower group comprises foundation concrete (1) and structural concrete (2) from bottom to top; Structural concrete (2) is provided on the foundation concrete (1), the top height of the structural concrete (2) being the same as that of the water intake tower, and a gantry crane track beam is buried in the top of the structural concrete (2); a door storage (3) is provided in the structural concrete (2), and the door storage (3) is used to accommodate an emergency maintenance door in a non-temporary water retaining condition.

2. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 1 is characterized by: A pressure-equalizing channel (4) is provided at the junction of the foundation concrete (1) and the structural concrete (2), and the pressure-equalizing channel (4) is used to connect the upstream reservoir water and the pool water between the tower bodies.

3. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 2 is characterized by: An inclined section is provided on the smoothing channel (4).

4. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 1 is characterized by: A traffic corridor (5) connecting the hoisting and shutting machine rooms of adjacent water intake towers is provided in the foundation concrete (1).

5. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 4 is characterized by: A drainage ditch (51) is provided in the traffic corridor (5), and the drainage ditch (51) is connected to the flood discharge tunnel.

6. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 1 is characterized by: A ladder (6) is provided on the side wall of the storage door storehouse (3).

7. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 1 is characterized by: A water collection pit (7) is provided at the bottom of the storage door storehouse (3).

8. The connection platform for connecting the super-large discharge flood discharge tunnel water intake tower group according to claim 7 is characterized by: A drainage pipe (8) is provided in the structural concrete (2) and the foundation concrete (1) below the sump (7); one end of the drainage pipe (8) is connected to the sump (7), and the other end of the drainage pipe (8) is connected to the traffic corridor (5).

9. A super-large discharge flood discharge tunnel water intake tower group, characterized in that: The super-large-volume spillway water intake tower group has multiple connection platforms for connecting the super-large-volume spillway water intake tower group as described in any one of claims 1-8, and the connection platform is arranged between two adjacent super-large-volume spillway water intake towers and is used to connect two adjacent super-large-volume spillway water intake towers.

Images