A zigzag alternate stockyard road arrangement method for roller compacted concrete dam

Abstract

The application discloses a zigzag alternating storage road arrangement method for roller compacted concrete dams, and relates to the field of roller compacted concrete dam construction, and comprises the following steps: step one, dam section pouring and height difference formation, during dam construction, pouring is performed in a dam section ascending mode from right to left; step two, synchronous pouring of slope structures, in each dam section requiring a step, a slope structure is formed along the upstream and downstream directions; step three, zigzag channel construction, two directions of two slope structures are alternately arranged, thereby forming a zigzag continuous construction channel connecting dam sections of different elevations on the left and right banks; and step four, rotary platform pouring, a rotary platform is arranged on the top of the slope structure of each dam section, the zigzag alternating storage road arrangement method does not need to simultaneously arrange construction channels on the left and right banks of the dam or adopt measures such as chute belts, and can meet the needs of concrete storage transportation channels of the whole dam, thereby saving the construction cost of construction roads and storage measures and accelerating the construction progress.

Description

Technical Field

[0001] This invention mainly relates to the technical field of roller-compacted concrete dam construction, specifically a method for arranging zigzag alternating entry roads in roller-compacted concrete dams. Background Technology

[0002] During the construction of roller-compacted concrete dams, factors such as phased construction of the dam, construction diversion, and construction constraints of special structural parts of the dam create certain height differences between different sections of the dam on the left and right banks. This makes it impossible to transport and pass roller-compacted concrete between the placement surfaces of different sections on the left and right banks, making it difficult to put the roller-compacted concrete into the placement and hindering the rapid placement of the roller-compacted concrete into the dam.

[0003] Existing solutions involve using chutes, conveyor belts, or other methods to transfer materials between dam sections with different elevation differences. However, these methods suffer from low construction efficiency, high construction costs, slow construction progress, low efficiency and high cost of chute material transfer, and the space-consuming and process-interfering nature of conveyor belt material transfer. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a method for arranging zigzag alternating entry roads for roller-compacted concrete dams, so as to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A method for arranging zigzag alternating entry roads in a roller-compacted concrete dam includes the following steps: Step 1: Dam Section Pouring and Elevation Difference Formation. During dam construction, given that the elevation of the left bank dam section is higher than that of the right bank dam section, the dam sections are poured in a step-by-step manner from right to left to create a stepped elevation difference between the dam sections. Step 2: Simultaneous pouring of slope structure. In each dam section where steps are required, the slope structure is poured simultaneously with the roller-compacted concrete pouring operation across the entire width of the dam section, along the upstream and downstream direction. There are two types of slope structures: one is a gentle slope with a lower upstream and a higher downstream, and the other is a continuous small step-like approximate slope with a higher upstream and a lower downstream. Step 3: Construction of the zigzag passage. The two directions of the two slope structures are set alternately to form a continuous zigzag construction passage connecting the dam sections with different elevations on the left and right banks. Step 4: Casting of the turning platform. A turning platform is set on the top of the slope structure of each dam section to meet the road requirements for turning and bending in the zigzag road.

[0006] Specifically, in step one of this technical solution, the height difference between each step is the height of a pouring layer, with the height ranging from 3m to 4m.

[0007] Specifically, in this technical solution, the slope of the gentle slope is less than 10%.

[0008] Specifically, the continuous small step-like slope is composed of continuous small steps with a width of 3m and a height of 0.3m. The edges of the continuous small steps are rolled and poured to form a slope with a slope ratio of no more than 1:2. The slope is formed by using a vibratory roller to move along the upstream and downstream direction as the thickness of the poured billet layer increases, allowing the roller to roll on the slope surface.

[0009] Specifically, in this technical solution, the slope ratio of the edge of the continuous small steps is adjusted to 1:5 within a local area at the middle position to meet the needs of vehicle passage.

[0010] Specifically, in this technical solution, the width of the rotating platform is not less than 8m.

[0011] In summary, the present invention has the following advantages: by utilizing the dam concrete itself to form a construction channel connecting the left and right banks at different elevations, it is not necessary to simultaneously construct construction channels to enter the dam surface on both banks of the dam, or to use measures such as chute belts, to meet the needs of the entire dam's concrete delivery channel, thereby saving construction costs for construction roads and delivery measures, and accelerating the construction progress. By utilizing the zigzag connecting roads within the dam, when pouring begins on the low-elevation section of the dam on the right bank, there is no need to change the access road. This allows for rapid and continuous construction of the dam at low elevations, avoiding construction interference caused by the change of access roads. At the same time, the access roads are completed simultaneously with the dam body pouring, without taking up additional construction time and without causing cross-interference with the construction of the internal structure of the dam. Furthermore, the entire passage directly connects dam sections at different elevations, allowing transport vehicles to directly access the construction site, significantly improving the efficiency of concrete delivery and fully leveraging the technological advantages of rapid construction of roller-compacted concrete dams. In addition, this layout method is more adaptable to terrain conditions, eliminating the need to be limited by the existing terrain on both sides of the dam site for the layout of access roads. It can flexibly adapt to roller-compacted concrete dam construction of different scales and segmentation methods, making the overall construction organization simpler and more controllable, and effectively ensuring the overall economy and construction safety of the project. Attached Figure Description

[0012] Figure 1 This is a flowchart of the steps of the present invention; Figure 2 This is a schematic diagram of the overall layout of the zigzag alternating warehouse entry road of the present invention. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0014] The embodiments of the present invention will now be described.

[0015] In this embodiment, please refer to Figure 1 and Figure 2 As shown, a method for arranging zigzag alternating entry roads for roller-compacted concrete dams includes the following steps: Step 1: Dam Section Pouring and Elevation Difference Formation. During dam construction, given that the elevation of the left bank dam section is higher than that of the right bank dam section, the dam sections are poured in a manner that raises them one by one from right to left, so that a step-like elevation difference is formed between each dam section. The elevation difference of each step is the height of one pouring layer, with the height value ranging from 3m to 4m. When the elevation of the right bank dam section is higher than that of the left bank, the dam section is poured in a way that raises the elevation of each dam section from left to right, and the slope structure and passage layout are set symmetrically with the original plan. Step 2: Synchronous pouring of the slope structure. In each dam section where steps are required, within the width of the entire dam section, generally about 20m along the dam axis, the slope structure is poured simultaneously with the roller-compacted concrete pouring operation. The slope structure is formed along the upstream and downstream direction. There are two types of slope structures: one is a gentle slope with a lower upstream and higher downstream, with a slope of less than 10%; the other is a continuous small step-like slope with a higher upstream and lower downstream. The continuous small step-like slope is composed of continuous small steps with a width of 3m and a height of 0.3m. The edges of the continuous small steps are rolled and poured to form a slope ratio of no more than 1:2. The slope is formed by using a vibratory roller to roll along the upstream and downstream direction as the thickness of the poured concrete layer increases. In the middle section of the continuous small steps, the slope ratio of the step edge is adjusted to 1:5 to meet the needs of vehicle passage. Step 3: Construction of the zigzag passage. The two directions of the two slope structures are set alternately to form a continuous zigzag construction passage connecting the dam sections with different elevations on the left and right banks. Step 4: Casting of the turning platform. A turning platform is set at the top of the slope structure of each dam section. The width of the turning platform is not less than 8m. The top surface of the platform is flush with the top of the slope. The surface is rolled flat and free of water accumulation to meet the road requirements for turning and bending in the zigzag road and to ensure that vehicles can smoothly switch driving directions between slopes of different elevations.

[0016] In this embodiment, the zigzag entry road is formed simultaneously with the dam body pouring, eliminating the need for additional chutes, conveyor belt transfer facilities, and dedicated temporary roads. Roller-compacted concrete can be transported directly from the low-elevation storage surface on the right bank to the high-elevation storage surface on the left bank via dump trucks along the zigzag channel, improving entry efficiency and reducing temporary engineering costs. The channel is integrated with the dam structure and does not occupy additional construction space, completely avoiding cross-interference with processes such as rebar binding, formwork installation, and dam surface compaction, thus shortening the construction period. At the same time, the continuous small-step slope design avoids the upstream and downstream through construction joints inclined downstream, ensuring good dam structure stability. The concrete density of the slope and platform has been tested and meets the design standards, ensuring reliable construction quality.

[0017] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A method for arranging zigzag alternating entry roads in a roller-compacted concrete dam, characterized in that, Includes the following steps: Step 1: Dam Section Pouring and Elevation Difference Formation. During dam construction, given that the elevation of the left bank dam section is higher than that of the right bank dam section, the dam sections are poured in a manner that raises them one by one from right to left, so that a step-like elevation difference is formed between each dam section. The elevation difference of each step is the height of one pouring layer, with the height value ranging from 3m to 4m. Step 2: Synchronous pouring of the slope structure. In each dam section where steps are required, the slope structure is poured simultaneously with the roller-compacted concrete pouring operation across the entire width of the dam section, forming a slope structure along the upstream and downstream direction. There are two types of slope structures: one is a gentle slope with a lower upstream and higher downstream slope, with a slope of less than 10%; the other is a continuous small step-like slope with a higher upstream and lower downstream slope. The continuous small step-like slope consists of continuous small steps with a width of 3m and a height of 0.3m. The edges of the continuous small steps are roller-compacted to form a slope ratio of no more than 1:

2. This slope is formed by using a vibratory roller to roll along the upstream and downstream direction to compact the slope surface as the thickness of the poured concrete layer increases. In the middle part of the continuous small steps, the slope ratio of the edge of the step is adjusted to 1:5 to meet the needs of vehicle passage. Step 3: Construction of the "Z"-shaped passage. The two directions of the two slope structures are set alternately to form a continuous "Z"-shaped construction passage connecting the dam sections with different elevations on the left and right banks. Step 4: Casting of the turning platform. A turning platform is set on the top of the slope structure of each dam section. The width of the turning platform is not less than 8m to meet the road requirements for turning and bending in a zigzag road.

Images