A shaped board assembled slope protection for panel rockfill dam cushion material and a construction method thereof

Abstract

This invention discloses a prefabricated slab-type slope protection system and construction method for the foundation material of a rockfill dam. The system includes a foundation material layer to be filled, with slope stabilizing components inclinedly arranged on the side of the foundation material layer. Each slope stabilizing component includes multiple support components and precast concrete slabs. The support components are spaced apart along the slope of the foundation material layer, and the precast concrete slabs are positioned between the support components. The support components, through an adjustment mechanism, suspend the precast concrete slabs along the slope of the foundation material layer. This invention forms a support system on the slope of the foundation material layer through the support components, precast concrete slabs, and adjustment mechanism. This system can not only withstand the overall stress of the slope but also resist lateral loads generated during filling and compaction. Simultaneously, the adjustment mechanism can correct the shape of the support components or precast concrete slabs, allowing for real-time dynamic adjustment of the slope protection position during pouring, thereby ensuring the filling quality of the foundation material.

Description

Technical Field

[0001] This invention relates to the field of slope protection technology, specifically to a prefabricated panel assembly slope protection system and construction method for the subbase material of rockfill dams. Background Technology

[0002] The methods commonly used for slope protection of the foundation material in rockfill dams include shotcrete, roller-compacted mortar, extrusion sidewall forming, and mortar slope stabilization.

[0003] Both sprayed concrete and roller-compacted mortar require overfilling and slope repair before the surface slope protection of the subbase material. During this process, extreme weather may cause the subbase material to be eroded and damaged. In some projects, the damage to the subbase material has led to insufficient filling and compaction to meet the original standards, resulting in uneven settlement and damage to the concrete panel. Extruded sidewall concrete has problems such as large concrete consumption, large size, high rigidity, strong constraint, and poor precision, resulting in a large amount of slope repair work in the later stage and problems such as voids at the bottom of the extruded sidewall. Formwork mortar slope stabilization improves construction precision and solves the problem of high rigidity, but it also has the problems of many procedures, difficult connection, and a large number of formwork and support structures that need to be installed and damaged during the strengthening and waiting period.

[0004] Therefore, it is particularly urgent to design a slope protection system that can continuously, rapidly, and throughout the entire process protect the subgrade material from being washed away, while also ensuring the quality of the subgrade material filling. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated panel assembly slope protection method and construction method for the cushion material of rockfill dams, which simplifies the slope protection of the cushion material of rockfill dams, enabling it to achieve continuous, rapid and full-process protection of the cushion material from being washed away, while ensuring the filling quality of the cushion material.

[0006] This invention is achieved through the following technical solution: A prefabricated panel-type slope protection for the subbase material of a rockfill dam includes a subbase material to be filled, and a slope stabilizing component is inclinedly arranged on the side of the subbase material to be filled. The slope stabilizing component includes multiple support components and prefabricated concrete slabs. Multiple support components are spaced apart along the slope of the subgrade material to be filled, and the precast concrete slab is disposed between the support components. The support components are adjusted by an adjustment mechanism to suspend the precast concrete slab along the slope of the subgrade material to be filled. The adjustment mechanism can correct the shape of the support components or the precast concrete slab.

[0007] In this scheme, the support components, precast concrete slabs, and the adjustment mechanism between the support components and the precast concrete slabs form a support system on the slope of the subbase material to be filled. The support system is used to bear the overall stress of the slope and resist the lateral loads generated by filling and compaction, thereby achieving the purpose of continuous, rapid, and full-process protection of the subbase material from being washed away. At the same time, the adjustment mechanism can also correct the shape of the support components or precast concrete slabs and can dynamically adjust the position of the slope protection during pouring in real time, thereby ensuring the filling quality of the subbase material.

[0008] As a further technical solution for the prefabricated plate assembled slope protection, the support component includes a main load-bearing channel steel and an auxiliary channel steel, and the adjustment mechanism includes a correction channel steel; The main load-bearing channel steel and the auxiliary channel steel are arranged sequentially from the inside to the outside. The main load-bearing channel steel and the auxiliary channel steel are connected as a whole by a reinforcing plate. The correcting channel steel is arranged in the same direction as the main load-bearing channel steel. The main load-bearing channel steel and the correcting channel steel are hinged together. Since the main load-bearing channel steel and the correcting channel steel are movable, the shape of the entire support system can be slightly corrected by adjusting the position of the correcting channel steel.

[0009] As a further technical solution for the prefabricated panel-type slope protection, the auxiliary channel steel extends along the direction of the correction channel steel, and the auxiliary channel steel and the correction channel steel are connected by adjusting turnbuckles to further realize the shape correction of the entire support system.

[0010] As a further technical solution for the prefabricated slab prefabricated slope protection, the adjustment mechanism also includes a top temporary buckle. The top temporary buckle is located on the slope surface of the subbase material to be filled. The precast concrete slab is detached from the correction channel steel by the top temporary buckle. After the subbase material to be filled is filled, the top temporary buckle can be removed and reused, thereby reducing construction costs.

[0011] As a further technical solution for the precast concrete slab assembly slope protection, adjacent precast concrete slabs are connected by tool clips, and a reserved gap is left between adjacent precast concrete slabs. The reserved gap is filled with plastic filler or mortar to prevent severe weather and rainstorms from washing away the lower cushion material through the joint surface, thereby forming a timely sealed protection for the cushion material layer.

[0012] As a further technical solution for the prefabricated concrete slab assembled slope protection, the support component fixes the precast concrete slab to the filled subgrade material layer through the embedded tie rod component. The embedded tie rod component located on the slope surface of the subgrade material layer to be filled is in a free state during filling, which facilitates the use of the subgrade material layer to be filled and fixed in the next stage.

[0013] As a further technical solution for the prefabricated concrete slab prefabricated slope protection, multiple corresponding limiting holes are provided between adjacent support components, and pressure strips matching the limiting holes are provided at both ends of the prefabricated concrete slab. Through the cooperation of the limiting holes and pressure strips, the lateral load of rolling is resisted, and the prefabricated concrete slab is prevented from being damaged by force.

[0014] A method for constructing a prefabricated panel assembled slope protection system for the cushion layer material of a rockfill dam with a concrete panel, employing any one of the above-mentioned technical solutions, includes the following specific construction steps: S1. Preparation: The problem of the initial three layers is solved by overfilling and slope cutting, setting self-advancing anchors as reinforcements and installing precast slabs, which creates conditions for the later use of precast slab assembly slope protection.

[0015] S2. Construction: First, the support components are set at intervals along the slope of the layer to be filled. Precast concrete slabs are set between the support components to bear the lateral load. Then, the adjacent precast concrete slabs are connected by tool clips, and a reserved gap is left between the adjacent precast concrete slabs. The reserved gap is filled with plastic filler or mortar. S3. The interconnected precast concrete slabs are fixed to the filled subbase material layer by pre-embedded tie rod assemblies. The precast concrete slabs located in the subbase material layer to be filled are temporarily connected to the support assembly by top temporary buckles. The precast concrete slabs adjust their shape with the adjustment mechanism. After the subbase material layer to be filled is filled, the top temporary buckles are removed and reused. S4. Repeat steps S2-S3 for subsequent subbase material to be filled layers.

[0016] As a further technical solution of the precast concrete slab assembly slope protection construction method, before laying the precast concrete slab, a layer of cement slurry with a thickness of 2-3mm is applied to the inner side of the precast concrete slab. The ratio of the cement slurry is water:cement = 0.5:1, which is used to ensure a good connection between the precast concrete slab and the subbase material.

[0017] As a further technical solution of the prefabricated plate assembly slope protection construction method, the pre-embedded tie rod assembly located on the slope surface of the subbase material to be filled is in a free state during filling.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention provides a prefabricated concrete slab revetment for the subbase material of a rockfill dam. A support system is formed on the slope surface of the subbase material to be filled by a support assembly, precast concrete slabs, and an adjustment mechanism between the support assembly and the precast concrete slabs. This support system bears the overall stress of the slope and resists the lateral loads generated during filling and compaction, thereby achieving continuous, rapid, and full-process protection of the subbase material from erosion. Simultaneously, the adjustment mechanism can correct the shape of the support assembly or precast concrete slabs, dynamically adjusting the position of the revetment during pouring in real time, thus ensuring the filling quality of the subbase material. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a top view of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] The attached diagram shows the markings and corresponding component names: 1-Support component, 2-Adjustment mechanism, 3-Precast concrete slab, 4-Reserved hole, 5-Pressure strip, 6-Tool buckle, 7-Transverse pressure strip, 8-Embedded tie rod assembly, 9-Reserved gap, 10-Main load-bearing channel steel, 11-Correction channel steel, 12-Auxiliary channel steel, 13-Reinforcing plate, 14-Limiting hole, 15-Adjusting turnbuckle, 16-Top temporary buckle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0022] This embodiment 1 provides a prefabricated panel assembly type slope protection for the cushion material of a rockfill dam, such as... Figure 1As shown, the structure includes a subgrade material to be filled. A slope stabilization component is inclinedly arranged on the side of the subgrade material to be filled. The slope stabilization component includes multiple support components 1 and precast concrete slabs 3. The multiple support components 1 are spaced apart along the slope of the subgrade material to be filled. The precast concrete slabs 3 are arranged between the support components 1. The support components 1, the precast concrete slabs 3 and the adjustment mechanism 2 form a support system on the slope of the subgrade material to be filled. The support components 1 are used to suspend the precast concrete slabs 3 along the slope of the subgrade material to be filled through the adjustment mechanism 2. The support system formed above can not only bear the overall force of the slope but also resist the lateral load generated by filling and compaction. At the same time, the adjustment mechanism 2 can also correct the shape of the support components 1 or the precast concrete slabs 3 and can dynamically adjust the position of the slope protection during pouring in real time.

[0023] Specifically, please refer to Figure 1 and Figure 2 As shown, the aforementioned support component 1 includes a main load-bearing channel steel 10 and an auxiliary channel steel 12, and the adjustment mechanism 2 includes a correction channel steel 11. The main load-bearing channel steel 10 and the auxiliary channel steel 12 are arranged sequentially from the inside to the outside. The main load-bearing channel steel 10 and the auxiliary channel steel 12 are welded together as a whole by a reinforcing plate 13. The correction channel steel 11 is arranged in the same direction as the main load-bearing channel steel 10. The main load-bearing channel steel 10 and the correction channel steel 11 are hinged together. The auxiliary channel steel 12 extends along the direction of the correction channel steel 11, and the auxiliary channel steel 12 and the correction channel steel 11 are connected by an adjusting turnbuckle 15. The body shape correction capability of the entire support system can be realized by adjusting the turnbuckle 15.

[0024] Please refer to the following: Figure 1 and Figure 2 As shown, the adjacent precast concrete slabs 3 are connected by tool clips 6, and each precast concrete slab 3 is provided with a pair of reserved holes 4. Each reserved hole 4 is provided with a pre-embedded tie rod assembly 8, which consists of a transverse pressure strip 7, a reinforcing bar, and a tie rod. At the same time, the adjustment mechanism 2 also includes a top temporary clip 16, which is located on the slope of the subbase material to be filled. The precast concrete slab 3 located on the subbase material to be filled is disassembled and set on the correction channel steel 11 through the top temporary clip 16, so that the precast concrete slab 3 is temporarily connected to the above-mentioned support system to form a cantilever state, which plays the role of protecting the subbase material. The precast concrete slab 3 can also be adjusted and corrected by adjusting the turnbuckle 15. After the subbase material to be filled is filled, the top temporary clip 16 can be removed for reuse.

[0025] It should also be noted that in this embodiment, when the subbase material to be filled layer is not filled, the pre-embedded tie rod assembly 8 is pre-installed at the reserved hole 4. That is, the pre-embedded tie rod assembly 8 located on the slope of the subbase material to be filled layer is in a free state during filling, which can facilitate the use of the subbase material to be filled layer in the next stage of filling and fixing. After the subbase material to be filled layer is filled, the reinforcing bars and tie rods will be fixed in the filling layer. The transverse pressure strip 7 crosses the support assembly 1 and connects to the reserved hole 4 on the adjacent precast concrete slab 3. The adjacent precast concrete slab 3 can be fixed to the filled subbase material filling layer through the pre-embedded tie rod assembly 8. In addition, a reserved gap 9 is left between the adjacent precast concrete slabs 3. The reserved gap 9 is filled with plastic filler or mortar, which can prevent the subbase material from being washed away by heavy rain in severe weather through the joint surface, thereby forming a timely sealing protection for the subbase layer.

[0026] In this embodiment, to avoid damage to the precast concrete slab 3 under stress, such as Figure 1 and Figure 2 As shown, multiple corresponding limiting holes 14 are provided between adjacent support components 1, and pressure strips 5 matching the limiting holes 14 are provided at both ends of the precast concrete slab 3. Through the cooperation of the limiting holes 14 and pressure strips 5, the lateral load of the cushion material being compacted during the filling of the filling layer can be resisted. Example 2

[0027] This embodiment 2 provides a method for constructing a prefabricated panel assembly slope protection system for the cushion layer material of a rockfill dam with a concrete panel. It adopts the prefabricated panel assembly slope protection system for the cushion layer material of a rockfill dam with a concrete panel as described in Embodiment 1. The specific construction steps are as follows: S1. Preparation: The problem of the initial three layers is solved by overfilling and slope cutting, setting self-advancing anchors as reinforcements and installing precast slabs, which creates conditions for the later use of precast slab assembly slope protection.

[0028] S2. Construction: First, the main load-bearing channel steel 10 and the auxiliary channel steel 12 are welded together as a whole by the reinforcing plate 13. Then, the main load-bearing channel steel 10 and the correcting channel steel 11 are hinged together to form the support component 1. The auxiliary channel steel 12 and the correcting channel steel 11 are connected by the adjusting turnbuckle 15 to form the adjusting mechanism 2. The above support component 1 is set at intervals along the slope of the layer to be filled. The precast concrete slab 3 is set between the adjacent main load-bearing channel steel 10 and the correcting channel steel 11 to bear the lateral load. Then, the adjacent precast concrete slabs 3 are connected by tool clips, and a 10mm reserved gap 9 is left between the adjacent precast concrete slabs 3. The reserved gap 9 is filled with plastic filler or mortar. S3. When the subgrade material to be filled layer is not filled, the pre-embedded tie rod assembly 8 is pre-installed at the reserved hole 4, that is, the pre-embedded tie rod assembly 8 located on the slope of the subgrade material to be filled layer is in a free state during filling; after the subgrade material to be filled layer is filled, the interconnected precast concrete slabs 3 are fixed to the filled subgrade material layer through the pre-embedded tie rod assembly 8. Specifically, the reinforcing bars and tie rods are fixed in the filling layer, and the transverse pressure strip 7 crosses the support assembly 1 to connect the reserved hole 4 on the adjacent precast concrete slabs 3. The adjacent precast concrete slabs 3 can be fixed to the filled subgrade material filling layer through the pre-embedded tie rod assembly 8. The precast concrete slabs 3 located in the subgrade material to be filled layer are temporarily connected to the support assembly 1 through the top temporary buckle 16 to form a cantilever state, which plays the role of protecting the subgrade material. The precast concrete slabs 3 adjust the body shape by adjusting the turnbuckle 15. After the subgrade material to be filled layer is filled, the top temporary buckle 16 is removed and reused. S4. Fill the subbase material to be filled, and repeat steps S2-S3.

[0029] In the above construction method, the precast concrete slab 3 has a length and width of 100cm×70cm and a thickness of 4-5cm. The material of the precast concrete slab 3 is C5 fiber concrete or lightweight aggregate fiber concrete, and a single layer of steel mesh is set. The tool clip 6 between the precast concrete slabs 3 consists of a screw, a washer and a nut.

[0030] In the above construction method, the main load-bearing channel steel 10, the correcting channel steel 11 and the auxiliary channel steel 12 are all No. 18 channel steel. The total length of the main load-bearing channel steel 10 and the correcting channel steel 11 is L=2500mm. The lower 1800mm support section is the main load-bearing channel steel 10 and the upper 700mm hinged section is the correcting channel steel 11.

[0031] In the above construction method, before laying the precast concrete slab 3, a layer of cement slurry with a thickness of 2 to 3 mm is applied to the inner side of the precast concrete slab 3. The ratio of the cement slurry is water:cement = 0.5:1, which is used to ensure a good connection between the precast concrete slab 3 and the subbase material.

[0032] In the above construction method, the pre-embedded tie rod assembly 8 located on the slope of the subbase material to be filled is in a free state during filling.

[0033] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A prefabricated panel assembly slope protection system for the foundation material of a rockfill dam, comprising a foundation material layer to be filled, wherein slope stabilizing components are inclinedly arranged on the side of the foundation material layer to be filled, characterized in that, The slope stabilization component includes multiple support components (1) and precast concrete slabs (3). Multiple support components (1) are spaced apart along the slope of the subbase material to be filled, and the precast concrete slab (3) is disposed between the support components (1). The support components (1) are adjusted by an adjustment mechanism (2) to suspend the precast concrete slab (3) along the slope of the subbase material to be filled. The adjustment mechanism (2) can correct the shape of the support components (1) or the precast concrete slab (3). The support component (1) includes a main load-bearing channel steel (10) and an auxiliary channel steel (12). The main load-bearing channel steel (10) and the auxiliary channel steel (12) are arranged sequentially from the inside to the outside. The main load-bearing channel steel (10) and the auxiliary channel steel (12) are connected into a whole by a reinforcing plate (13). The adjustment mechanism (2) includes a correction channel steel (11), which is arranged in the same direction as the main force channel steel (10). The main force channel steel (10) and the correction channel steel (11) are hinged together. The auxiliary channel steel (12) extends along the direction of the correction channel steel (11) and is connected to the correction channel steel (11) by an adjustment turnbuckle (15). The adjustment mechanism (2) also includes a top temporary buckle (16), which is located on the slope of the subbase material to be filled, and the precast concrete slab (3) is disassembled and set on the correction channel steel (11) through the top temporary buckle (16).

2. The prefabricated panel revetment for the cushion layer of a rockfill dam according to claim 1, characterized in that, The adjacent precast concrete slabs (3) are connected by tool clips (6), and a reserved gap (9) is left between the adjacent precast concrete slabs (3), which is filled with plastic filler or mortar.

3. A prefabricated panel revetment for a rockfill dam cushion layer as described in claim 2, characterized in that, The support component (1) fixes the precast concrete slab (3) to the filled subbase material layer through the pre-embedded tie rod component (8), and the pre-embedded tie rod component (8) located on the slope of the subbase material layer to be filled is in a free state during filling.

4. A prefabricated panel revetment for a rockfill dam cushion layer as described in claim 1, characterized in that, Multiple corresponding limiting holes (14) are provided between adjacent support components (1), and pressure strips (5) matching the limiting holes (14) are provided at both ends of the precast concrete slab (3).

5. A method for constructing prefabricated panel assembly slope protection for the cushion layer of a rockfill dam, characterized in that, The specific construction steps for using a prefabricated panel assembly slope protection system for the cushion layer material of a rockfill dam as described in any one of claims 1-4 are as follows: S1. Preparation: The problem of the initial three layers is solved by overfilling and then cutting the slope, setting self-advancing anchors as reinforcements and installing precast slabs, so as to create conditions for the later use of precast slabs for the slope protection. S2. Construction: First, the support components (1) are set at intervals along the slope of the layer to be filled. Precast concrete slabs (3) are set between the support components (1) to bear the lateral load. Then, the adjacent precast concrete slabs (3) are connected by tool clips (6), and a reserved gap (9) is left between the adjacent precast concrete slabs (3). The reserved gap (9) is filled with plastic filler or mortar. S3. The precast concrete slabs connected to each other are fixed to the filled subbase material layer by the embedded tie rod assembly (8). The precast concrete slab (3) located in the subbase material layer to be filled is temporarily connected to the support assembly (1) by the top temporary buckle (16). The precast concrete slab (3) adjusts the body shape with the adjustment mechanism (2). After the subbase material layer to be filled is filled, the top temporary buckle (16) is taken out and reused. S4. Repeat steps S2-S3 for subsequent subbase material to be filled layers.

6. A method for constructing a prefabricated panel assembly slope protection system for a rockfill dam cushion layer, as described in claim 5, is characterized in that... Before laying the precast concrete slab (3), a layer of cement slurry with a thickness of 2 to 3 mm is applied to the inner side of the precast concrete slab (3), and the ratio of the cement slurry is water: cement = 0.5:

1.

7. A method for constructing a prefabricated panel assembly slope protection system for a rockfill dam cushion layer, as described in claim 6, characterized in that... The pre-embedded tie rod assembly (8) located on the slope of the subbase material to be filled is in a free state during filling.

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