Arch dam back traffic structure

Abstract

The application provides an arch dam back traffic structure, the arch dam is formed by pouring concrete, and the arch dam back traffic structure comprises: a plurality of I-beam, which are arranged at a preset distance along the circumference of the arch dam curved surface, each I-beam is embedded in the arch dam body at a preset elevation along the radial direction of the arch dam, a part of the length of each I-beam is embedded in the dam body, and the remaining part is in overhang, and the embedded length of each I-beam is greater than or equal to the overhang length; at least two pull rod steels are fixedly connected to the embedded part of each I-beam, the two pull rod steels are arranged on both sides of the I-beam, one end of each pull rod steel is connected to the I-beam, and the other end of each pull rod steel is connected to the exposed steel on the concrete pouring bin surface; a patterned steel plate is laid on the embedded I-beams, and the lower surface of the patterned steel plate is welded to the I-beams. The structure has the advantages of good appearance quality, safety and reliability, and convenient construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water conservancy and hydropower engineering construction, in particular to an arch dam back traffic structure. BACKGROUND

[0002] The concrete dam back traffic structure needs to have the characteristics of meeting functional requirements, small construction interference, and neat and beautiful appearance. The current conventional construction methods include two kinds. The first kind is to form by post-casting after pre-embedding the embedded bars. The construction of this traffic structure needs to set up a relatively complex scaffold, and the overall economy and safety are poor. The second kind is to form by splicing precast concrete beams and plates. This traffic structure needs to precast beams. When facing the arch dam, the size of the beam needs to be adjusted according to the dam surface, which leads to great difficulty in early manufacturing and hoisting construction. On the other hand, the overallity, rigidity and seismic performance of the precast concrete beam are poor. Therefore, it is urgent to develop a dam back traffic structure suitable for arch dams. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide an arch dam back traffic structure, which solves the problems of poor appearance pouring quality, inconvenient cantilever support construction, and great difficulty in early manufacturing and hoisting construction of the dam back traffic structure in the prior art.

[0004] An arch dam back traffic structure is provided. The arch dam is formed by concrete pouring. The arch dam back traffic structure comprises:

[0005] A plurality of I-beam steel beams are arranged at a preset distance along the circumference of the arch dam curved surface. Each I-beam steel beam is pre-embedded in the arch dam body at a preset elevation along the radial direction of the arch dam. Part of the length of each I-beam steel beam is pre-embedded in the dam body, and the remaining part of the length is cantilevered. The pre-embedded length of each I-beam steel beam is greater than or equal to the cantilevered length. The pre-embedded part of each I-beam steel beam in the dam body is fixedly connected to the concrete pouring bin surface.

[0006] A pull rod steel bar is fixedly connected to each I-beam steel beam pre-embedded in the dam body. The two pull rod steel bars are arranged on both sides of the I-beam steel beam. One end of each pull rod steel bar is connected to the I-beam steel beam, and the other end of each pull rod steel bar is connected to the exposed steel bar on the concrete pouring bin surface.

[0007] A patterned steel plate is laid on the pre-embedded plurality of I-beam steel beams. The lower surface of the patterned steel plate is welded to the plurality of I-beam steel beams.

[0008] In an embodiment, the two pull rod steel bars connected to each I-beam steel beam are symmetrically arranged. The included angle between each pull rod steel bar and the I-beam steel beam is 30 degrees.

[0009] In an embodiment, the I-shaped steel beams adopt I20 specifications, and the plurality of I-shaped steel beams are arranged at an interval of 1.5 m along the circumference of the arch dam surface.

[0010] In an embodiment, an angle steel is further included, which is fixed on the center line of the lower surface of the checkered steel plate, and is full-welded between the checkered steel plate and the I-shaped steel beam, the thickness of the checkered steel plate is 4 mm, and the size of the angle steel is 50 mm*50 mm*4 mm.

[0011] In an embodiment, the checkered steel plate includes a plurality of pieces, and the length of each piece of the checkered steel plate is 1.5 m, and each piece of the checkered steel plate is full-welded with the I-shaped steel beam through the angle steel.

[0012] In an embodiment, a handrail is further included, which is arranged on the downstream side of the checkered steel plate, the height of the handrail is 1200 mm, the handrail includes a plurality of columns and a handrail, the columns adopt φ50 mm stainless steel pipes, the wall thickness of the stainless steel pipe columns is 2.5 mm, the plurality of columns are welded on the checkered steel plate along the circumference of the arch surface, the interval of the plurality of columns is 2000 mm, and the handrail is arranged along the height direction of the columns.

[0013] In an embodiment, the handrail includes φ60 mm stainless steel pipes and φ20 mm stainless steel pipes, the φ60 mm stainless steel pipes are arranged on the top of the columns, the wall thickness of the φ60 mm stainless steel pipes is 3 mm, two layers of the φ20 mm stainless steel pipes are uniformly arranged in the middle region of the columns, and the wall thickness of the φ20 mm stainless steel pipes is 2.5 mm.

[0014] In an embodiment, the surfaces of the plurality of I-shaped steel beams and the checkered steel plate are coated with Sudan red anti-rust paint.

[0015] The arch dam rear traffic structure in the present application has the following beneficial effects:

[0016] 1. Compared with the original dam rear traffic processing technology, the present application adopts the construction method of pre-buried I-shaped steel and adopts the pull rod to fix and position in the elevation and horizontal direction, so as to realize the rapid forming of the dam rear traffic. That is, the light steel pedestrian bridge is used to solve the problems of poor appearance pouring quality and inconvenient cantilever support construction of the dam rear traffic structure in the prior art. The overall arch dam rear traffic structure is light, safe, economical and beautiful, and has the advantages of good appearance quality, high precision, good stability, safety and reliability, and convenient construction.

[0017] 2. The present application is suitable for concrete downstream dam surface inspection. Especially important is that in the construction of hydropower projects, the present application can be combined with concrete pouring to speed up the construction progress and save engineering investment, and at the same time, the present application is light and beautiful. BRIEF DESCRIPTION OF DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a traffic structure downstream of an arch dam according to an embodiment of this application;

[0020] Figure 2 for Figure 1 A cross-sectional view of a traffic structure downstream of an arch dam is shown.

[0021] 100. Arch dam; 200. I-beam; 300. Tie rod reinforcement; 400. Patterned steel plate; 500. Angle steel; 600. Railing. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] The downstream traffic structure of a concrete dam needs to meet functional requirements, minimize construction interference, and have a neat and aesthetically pleasing appearance. Due to the large volume of concrete poured in a concrete dam, if construction is carried out with the same precision control as large-volume concrete, it is difficult to achieve ideal construction accuracy, often resulting in a poor appearance of the downstream traffic structure that requires secondary adjustments. Conversely, if construction is carried out with the same precision control as downstream traffic, it will affect the pouring speed of the large-volume concrete. Currently, commonly used construction methods mainly include pre-embedded reinforcing bars and subsequent on-site casting to form the downstream traffic structure, and the use of precast concrete beams and slabs spliced ​​together to form the downstream traffic structure. Both methods have certain drawbacks. The former requires a considerable amount of complex scaffolding to support the higher locations of the traffic platform, resulting in poor economy and safety. The latter has poor overall integrity, rigidity, and seismic performance, and for arch dams, the precast dimensions need to be adjusted according to the dam surface conditions, increasing the difficulty of the construction process.

[0025] To overcome the shortcomings of existing technologies in terms of inconsistent control precision and construction methods, there is an urgent need to provide a new type of downstream traffic bridge with high precision, convenient construction, good stability, and good aesthetic quality.

[0026] Figure 1 This is a schematic diagram illustrating a traffic structure downstream of an arch dam according to an embodiment of this application. See also... Figure 1 The arch dam 100 is made of cast concrete, and the traffic structure behind the arch dam includes multiple I-beams 200, tie rods 300, and patterned steel plates 400.

[0027] Multiple I-beams 200 are arranged at predetermined intervals along the circumferential direction of the arc surface of the arch dam 100. Each I-beam 200 is embedded radially in the dam body of the arch dam 100 at a predetermined elevation. Part of the length of each I-beam 200 is embedded in the dam body of the arch dam 100, and the remaining length is cantilevered. The embedded length L1 of each I-beam 200 is greater than or equal to the cantilever length L2. The embedded part of each I-beam 200 in the dam body is fixedly connected to the concrete pouring surface.

[0028] To ensure precise positioning of the I-beams, each I-beam 200 is pre-embedded with at least two tie rods 300 within the dam body. The two tie rods 300 are arranged on both sides of the I-beam 200, with one end of each tie rod 300 connected to the I-beam 200 and the other end of each tie rod 300 connected to the exposed reinforcing bars on the concrete pouring surface.

[0029] The patterned steel plate 400 is laid on multiple pre-embedded I-beams 200, and the lower surface of the patterned steel plate 400 is fully welded to the multiple I-beams 200.

[0030] In the aforementioned implementation process, the arch-dam type downstream traffic structure, combining I-beams and checkered steel plates, not only satisfies the requirements of being lightweight and aesthetically pleasing but also is suitable for downstream dam surface inspection. Most importantly, in hydropower engineering construction, its integration with concrete pouring accelerates construction progress and saves on project investment. This application utilizes a lightweight steel pedestrian bridge to address the problems of poor appearance and pouring quality, as well as the inconvenience of cantilever support construction in existing downstream traffic structures. It employs a pre-embedded I-beam construction method and uses tie rods for elevation and horizontal positioning, achieving rapid formation of the downstream traffic structure. This type of downstream traffic structure is lightweight, safe, economical, and aesthetically pleasing, offering advantages such as good appearance quality, reliable safety, and convenient construction.

[0031] In one implementation scheme, in conjunction with the downstream structure of the arch dam 100, two tie rods 300 connected to each I-beam 200 are symmetrically arranged, with each tie rod 300 having an angle of 30 degrees with the I-beam 200. The two tie rods 300 and each I-beam 200 form a stable spatial component, so that the stability of the I-beam meets the requirements of later construction.

[0032] In one implementation scheme, to meet the traffic intensity requirements downstream of the arch dam 100, the I-beams 200 adopt the I20 specification, and multiple I-beams 200 are arranged at circumferential intervals of 1.5m along the arc surface of the arch dam 100.

[0033] In one implementation, to ensure the shared load-bearing capacity of the traffic structure, an angle steel 500 is also included. The patterned steel plate 400 is welded to the I-beam 200 via the angle steel 500. The angle steel 500 is fixed on the centerline of the lower surface of the patterned steel plate 400. The angle steel 500 is fully welded to the patterned steel plate 400 and the I-beam 200. The thickness of the patterned steel plate 400 is 4mm, and the dimensions of the angle steel 500 are 50mm × 50mm × 4mm.

[0034] In one embodiment, the patterned steel plate 400 comprises multiple pieces, each patterned steel plate 400 having a length of 1.5m, and the bottom middle area of ​​each patterned steel plate 400 being fully welded to the I-beam 200 via angle steel.

[0035] In one implementation scheme, to ensure the safety of inspections downstream of the dam, a guardrail 600 is also included; see [link / reference]. Figure 2 The railing 600 is located on the downstream side of the patterned steel plate 400. The railing 600 is 1200mm high and includes multiple posts and handrails. The posts are made of φ50mm stainless steel pipes with a wall thickness of 2.5mm. Multiple posts are welded to the patterned steel plate 400 along the circumference of the arc surface. The spacing between the multiple posts is 2000mm. The handrails are arranged along the height of the posts.

[0036] In one embodiment, the handrail includes a φ60mm stainless steel tube and a φ20mm stainless steel tube. The φ60mm stainless steel tube is set at the top of the column and has a wall thickness of 3mm. Two layers of φ20mm stainless steel tubes are evenly arranged in the middle area of ​​the column and have a wall thickness of 2.5mm.

[0037] In one implementation, to prevent steel corrosion and improve structural durability, the surfaces of multiple I-beams 200 and checkered steel plates 400 are coated with Sudan Red anti-rust paint. Specifically, the surfaces of the I-beams 200 and checkered steel plates 400 are cleaned and then coated with two coats of Sudan Red anti-rust paint.

[0038] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A traffic structure downstream of an arch dam, characterized in that, The arch dam is formed by cast-in-place concrete, and the traffic structure downstream of the arch dam includes: Multiple I-beams are arranged at predetermined intervals along the circumference of the arched surface of the dam. Each I-beam is embedded radially within the dam body at a predetermined elevation. A portion of the length of each I-beam is embedded within the dam body, while the remaining length is cantilevered. The embedded length of each I-beam is greater than or equal to the cantilever length. The portion of each I-beam embedded within the dam body is fixedly connected to the concrete pouring surface. Tie rod reinforcement: At least two tie rod reinforcements are fixedly connected to the pre-embedded part of each I-beam within the dam body. The two tie rod reinforcements are arranged on both sides of the I-beam. One end of each tie rod reinforcement is connected to the I-beam, and the other end of each tie rod reinforcement is connected to the exposed reinforcement on the concrete pouring surface. Patterned steel plates are laid on multiple pre-embedded I-beams, and the lower surface of the patterned steel plates is welded to the multiple I-beams.

2. The traffic structure downstream of an arch dam according to claim 1, characterized in that, Two tie rods connected to each I-beam are arranged symmetrically, with each tie rod forming a 30-degree angle with the I-beam.

3. The traffic structure downstream of an arch dam according to claim 1, characterized in that, The I-beams are of I20 specification, and the multiple I-beams are arranged at circumferential intervals of 1.5m along the arc surface of the arch dam.

4. The traffic structure downstream of an arch dam according to claim 3, characterized in that, It also includes angle steel, which is fixed on the centerline of the lower surface of the patterned steel plate. The angle steel is fully welded to the patterned steel plate and the I-beam. The thickness of the patterned steel plate is 4mm, and the dimensions of the angle steel are 50mm×50mm×4mm.

5. A traffic structure downstream of an arch dam according to claim 4, characterized in that, The patterned steel plate consists of multiple pieces, each with a length of 1.5m. Each patterned steel plate is fully welded to the I-beam using angle steel.

6. The traffic structure downstream of an arch dam according to claim 1, characterized in that, It also includes a railing, which is located on the downstream side of the patterned steel plate. The railing is 1200mm high and includes multiple posts and handrails. The posts are made of φ50mm stainless steel pipes with a wall thickness of 2.5mm. The multiple posts are welded to the patterned steel plate circumferentially along the arc surface. The spacing between the multiple posts is 2000mm. The handrails are arranged along the height of the posts.

7. A traffic structure downstream of an arch dam according to claim 6, characterized in that, The handrail comprises a φ60mm stainless steel tube and a φ20mm stainless steel tube. The φ60mm stainless steel tube is installed at the top of the column and has a wall thickness of 3mm. The two layers of φ20mm stainless steel tubes are evenly arranged in the middle area of ​​the column and have a wall thickness of 2.5mm.

8. The traffic structure downstream of an arch dam according to claim 1, characterized in that, The surfaces of the multiple I-beams and patterned steel plates are all coated with Sudan Red anti-rust paint.

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