Interlocking concrete block curved-slope construction system and method

Abstract

The present application relates to the field of slope protection engineering, and discloses a system for constructing a curved slope surface by using interlocking concrete precast blocks and a construction method thereof, which comprises a precast block body and a paving tool, and the precast block body is in a rectangular block structure. In the present application, when adjacent precast blocks are paved, the side surface of a rear paving block body slides into an embedded groove along a wedge surface, automatic centering and guiding are realized by using the progressive mechanical engagement of the groove wall, the assembly interference caused by manufacturing errors and curvature deviations of traditional flat tenon and groove is eliminated, the inner wall of the embedded groove is fixed with an elastic adjusting piece through an embedded connecting piece, a preset gap of 2-5 mm is maintained with the groove wall in a natural state, controllable elastic deformation is generated after being pressed, the deformation provides a flexible compensation space of 2-5 mm for the angle deviation between the blocks, and a continuous and stable lateral compression force is formed between the blocks through the resilience, thereby fundamentally solving the gap and stress concentration problems caused by geometric incoordination in the curved surface paving of traditional rigid connection.

Description

Technical Field

[0001] This invention relates to the field of slope protection engineering, and in particular to an interlocking precast concrete block curved slope construction system and its construction method. Background Technology

[0002] With the rapid development of urban landscaping and ecological slope protection projects, curved slope protection and landscape paving have gradually become important engineering forms. Precast concrete blocks are widely used in such slope paving due to their convenient production, controllable cost, and good durability.

[0003] However, existing rectangular or regular-shaped precast blocks present significant technical challenges when constructing curved slopes. Firstly, variations in slope curvature make it difficult for blocks to achieve stable planar coordination. Traditional rigid interlocking or straight tongue-and-groove structures are prone to creating large gaps or localized stress concentrations at slope inflection points, leading to a decrease in the overall stability of the pavement layer and even block lifting or slippage. Secondly, the slope subbase itself exhibits certain elevation differences and irregular deformations, making it difficult for ordinary flat-bottomed precast blocks to effectively adhere to the subbase. This results in uneven stress distribution at the bottom of the blocks, which can easily lead to localized settlement or hollowing after long-term use, affecting the overall service life and aesthetic appearance. These problems are particularly prominent in the construction of slopes with large curvatures or composite slopes, severely limiting the application scope and paving quality of precast blocks in curved slope projects.

[0004] Therefore, there is an urgent need for a precast block paving system that can adapt to changes in slope curvature and undulations in subgrade elevation, and has reliable interlocking stability, in order to meet the comprehensive requirements of modern landscape slope protection projects for construction efficiency, structural stability and durability. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an interlocking precast concrete block curved slope construction system and its construction method, thus solving the above problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an interlocking precast concrete block curved slope construction system, comprising a precast block body and paving tools. The precast block body is a rectangular block structure, with wedge-shaped fitting grooves extending along the height direction on its opposite two sides. The width of the groove opening is greater than the width of the groove bottom, and the angle between the groove wall and the side is 75 to 85 degrees. An elastic adjustment piece is fixed in the wedge-shaped fitting groove by an embedded connector. The free end of the elastic adjustment piece extends towards the groove opening. When two adjacent precast block bodies are paved, the wedge-shaped fitting groove of one precast block body cooperates with the side of the other precast block body to form a wedge fit. The elastic adjustment piece forms an elastic support between the two precast block bodies. The bottom surface of the precast block body is provided with multi-level height difference compensation protrusions. The multi-level height difference compensation protrusions include a first protrusion and a second protrusion with different heights. The first protrusion is distributed in the corner area of ​​the bottom surface, and the second protrusion is distributed in the middle area of ​​the bottom surface. The height difference adaptive compensation is achieved by selectively contacting the pad layer. The paving tool includes a main lever arm, an auxiliary adjusting arm, and a curvature adaptive slide rail. One end of the main lever arm is provided with a gripping part that mates with the top surface of the precast block body, and the other end is provided with an operating handle. An adjustable support shaft is provided in the middle. The auxiliary adjusting arm is connected to the main lever arm through a hinge joint, and its free end is provided with a pushing head that mates with the side of the precast block body. The curvature adaptive slide rail includes an arc-shaped guide rail and a sliding seat. The sliding seat is slidably connected along the arc-shaped guide rail and is provided with a retractable positioning pin. The positioning pin mates with a positioning hole on the top surface of the precast block body.

[0007] Preferably, the elastic adjustment piece is made of thermoplastic polyurethane with a thickness of 3 mm to 8 mm. The inner wall of the wedge-shaped fitting groove is provided with multiple slots with a spacing of 50 mm to 80 mm along the height direction. The elastic adjustment piece is fixed in the slots at different heights by embedded connectors. The elastic adjustment piece forms a preset gap of 2 mm to 5 mm with the groove wall in its natural state.

[0008] Preferably, the first boss is a frustum-shaped structure with a bottom diameter of 80 mm to 120 mm and a height of 15 mm to 25 mm; the second boss is a frustum-shaped structure with a bottom diameter of 60 mm to 100 mm and a height of 8 mm to 15 mm; the top surfaces of both the first and second bosses are provided with anti-slip textures.

[0009] Preferably, the gripping part includes two symmetrically arranged gripping claws, which are connected to the main lever arm via a spring mechanism. The inner surface of the gripping claws is provided with a rubber anti-slip pad. The auxiliary adjusting arm rotates in the horizontal plane via a hinge joint, with a rotation angle range of -30 degrees to +30 degrees, and is provided with an angle locking mechanism to fix the rotation angle.

[0010] Preferably, the radius of curvature of the arc-shaped guide rail is 3000 mm to 8000 mm, the positioning pin is a pneumatic telescopic rod structure with an extension stroke of 20 mm to 40 mm, and a tapered guide head is provided at the end. The positioning pin is connected to a pneumatic control device, which is used to control the extension and retraction of the positioning pin. The top surface of the precast block body is provided with at least two positioning holes with a diameter of 12 mm to 18 mm and a depth of 25 mm to 35 mm. The bottom of the sliding seat is provided with a roller, which rolls in cooperation with the arc-shaped guide rail.

[0011] Preferably, a sensing chip is embedded inside the precast block body. The sensing chip is located at the geometric center and includes a tilt sensor and a displacement sensor. The sensing chip is connected to an external monitoring system via a low-power Bluetooth wireless communication module.

[0012] Preferably, a flexible connecting strip is provided at the joint between adjacent precast block bodies. The flexible connecting strip has a strip-shaped structure with a honeycomb structure inside. Its two sides are bonded to the sides of the precast block body, and a grouting channel is provided inside. After the flexible grout is injected and cured, an elastic connecting layer is formed.

[0013] A construction method for interlocking precast concrete block curved slopes includes the following steps: S1. Slope base treatment and subbase laying: The curved slope is leveled, a gravel subbase is laid and compacted, and the flatness deviation of the subbase is controlled. S2. Precast block layout design: Digital layout design based on BIM technology, dividing the paving area according to the slope curvature change, and determining the paving sequence and adjustment joint position of the precast block body. S3. Precast block grabbing and transfer: Using paving tools, the top surface of the precast block body is clamped by the gripping part, and the precast block body is transferred from the stacking area to the paving operation surface by using the support shaft as the fulcrum and lever principle. S4. Curvature adaptive positioning: Place the curvature adaptive slide rail on the slope, and slide the sliding seat along the arc guide rail to adapt to the curvature of the slope. Initial positioning is performed by inserting the positioning pin into the positioning hole of the precast block body. The auxiliary adjustment arm is operated to push the push head to push the side of the precast block body to achieve precise lateral positioning. S5. Wedge-shaped interlocking paving: The side of the adjacent precast block body is inserted into the wedge-shaped interlocking groove of the paved precast block body. The elastic adjustment plate undergoes elastic deformation under pressure, forming elastic support and flexible interlocking, and automatically compensates for angle deviation according to the change of slope curvature. S6. Height difference adaptive compensation: The multi-level height difference compensation bosses on the bottom surface of the precast block body contact the pad layer. The first boss and the second boss selectively contact the pad layer according to the local curvature change. The height difference adaptive compensation is achieved through stepped contact to ensure uniform stress distribution on the bottom surface of the block. S7. Joint treatment and connection: Install a flexible connecting strip at the joint between adjacent precast blocks, inject flexible grout through the grouting channel, and form an elastic connection layer after curing. S8. Quality monitoring and control: The tilt angle and displacement data of the precast block body are monitored in real time through the sensor chip and transmitted to the external monitoring system for quality deviation early warning and full-cycle control.

[0014] Preferably, in step S2, the paving sequence is from the toe of the slope upwards, with the adjustment joint as the boundary for segmented construction; in step S4, the positioning accuracy is controlled within ±3mm; in step S5, the compression deformation of the elastic adjustment piece is controlled within the elastic deformation range to ensure that the overall smoothness of the paving layer is ≤8mm / m.

[0015] Preferably, in step S6, the second protrusion mainly supports the slope area with small curvature, while the first protrusion compensates for the height difference in the slope area with large curvature, so that the posture of the precast block body is adaptively adjusted, the slope anti-slip coefficient is ≥1.4, and the water flow erosion resistance is ≥2.5m / s.

[0016] Beneficial effects This invention provides an interlocking precast concrete block curved slope construction system and its construction method. Compared with the prior art, it has the following advantages: 1. In this invention, based on the collaborative working principle of wedge-shaped guidance, elastic compensation, and flexible locking, an interlocking structure adaptive to curvature changes is constructed. When adjacent precast blocks are laid, the side of the later-laid block slides into the interlocking groove along the wedge-shaped surface. Automatic centering guidance is achieved by utilizing the progressive mechanical interlocking of the groove wall, eliminating assembly interference caused by manufacturing errors and curvature deviations in traditional straight tenon grooves. The inner wall of the interlocking groove is fixed by an elastic adjustment piece through an embedded connector. In its natural state, it maintains a preset gap of 2 mm to 5 mm with the groove wall. Under pressure, it generates controllable elastic deformation. This deformation provides 2 mm to 5 mm of flexible compensation for angular deviations between blocks. The elastic adjustment plate creates a continuous and stable lateral clamping force between the blocks through the rebound force, enabling adjacent blocks to form a flexible interlocking state at the curvature change points, which is locked but can be finely adjusted. This fundamentally solves the problem of gaps and stress concentration caused by geometric inconsistencies in traditional rigid connections in curved pavement. It controls the overall smoothness of the pavement layer to ≤8mm / m and increases the anti-skid coefficient to ≥1.4, effectively preventing blocks from lifting or slipping. At the same time, the buffering effect of the elastic adjustment plate can absorb the energy of temperature deformation and water flow impact, increasing the slope's resistance to water flow erosion to ≥2.5m / s, and significantly enhancing the overall stability and durability of the pavement layer. 2. In this invention, the first and second protrusions form a two-level support surface based on their height difference. The first protrusions, located at the four corners of the bottom surface, have a height of 15 mm to 25 mm, while the second protrusions, located in the central area, have a height of 8 mm to 15 mm. During installation, the top surfaces of the protrusions make differentiated contact according to the local curvature and undulation of the subgrade: in relatively flat or low-curvature areas of the subgrade, the higher first protrusions make stable contact with the subgrade, while the lower second protrusions provide auxiliary restraint, forming a four-point main support and a central auxiliary support structure. In areas of significant undulation or high curvature of the subgrade, the first... The first boss is deeply embedded in the cushion layer to compensate for the height difference, while the second boss is moderately disengaged to create clearance space. This allows the precast block to automatically adjust its posture to fit the local slope surface. The stress on the bottom surface of the block is evenly distributed through the dynamic combination of the two bosses, avoiding cushion layer crushing or block fracture caused by local stress concentration. Compared with traditional structures, the on-site cutting loss rate is reduced to ≤5%, eliminating the hidden dangers of local settlement and hollowing during long-term use, and extending the service life of the slope protection by 30% to 100%. At the same time, the anti-slip texture on the top surface of the boss enhances the friction resistance of the base, further improving the anti-slip stability of the structure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an interlocking precast concrete block curved slope construction system proposed in this invention; Figure 2 This is a plan view of an interlocking precast concrete block curved slope construction system proposed in this invention; Figure 3 This is a schematic diagram of the end structure of the precast block body of an interlocking precast concrete block curved slope construction system proposed in this invention. Figure 4 This is a schematic diagram of the installation plan of an interlocking precast concrete block curved slope construction system proposed in this invention.

[0018] Legend: 1. Precast block body; 11. Wedge-shaped fitting groove; 12. Elastic adjustment piece; 13. Embedded connector; 14. Multi-level height difference compensation boss; 141. First boss; 142. Second boss; 2. Paving tool; 21. Main lever arm; 15. Positioning hole; 16. Sensor chip; 161. Tilt sensor; 162. Displacement sensor; 163. Wireless communication module; 17. Flexible connecting strip; 171. Grouting channel; 2 2. Auxiliary adjusting arm; 23. Grip part; 231. Clamping claw; 232. Spring mechanism; 233. Rubber anti-slip pad; 24. Operating handle; 25. Support shaft; 26. Hinge joint; 27. Push head; 28. Curvature adaptive slide rail; 281. Arc guide rail; 282. Sliding seat; 283. Positioning pin; 284. Roller; 285. Pneumatic control device; 286. Conical guide head; 29. ​​Angle locking mechanism. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-4 The present invention provides two technical solutions, specifically including the following embodiments: Example 1: An interlocking precast concrete block curved slope construction system includes a precast block body 1 and a paving tool 2. The precast block body 1 is a rectangular block structure, with wedge-shaped interlocking grooves 11 extending along the height direction on its opposite two sides. The width of the groove opening of the wedge-shaped interlocking groove 11 is greater than the width of the groove bottom, and the angle between the groove wall and the side is 75 degrees to 85 degrees. An elastic adjustment plate 12 is fixed in the wedge-shaped interlocking groove 11 by an embedded connector 13. The free end of the elastic adjustment plate 12 extends towards the groove opening. The elastic adjustment plate 12 is made of thermoplastic polyurethane and has a thickness of [missing information]. The inner wall of the wedge-shaped fitting groove 11 is provided with multiple slots with a spacing of 50 mm to 80 mm along the height direction. The elastic adjustment piece 12 is fixed in the slots at different heights by the embedded connector 13. In its natural state, the elastic adjustment piece 12 forms a preset gap of 2 mm to 5 mm with the groove wall. When two adjacent precast block bodies 1 are laid, the wedge-shaped fitting groove 11 of one precast block body 1 cooperates with the side of the other precast block body 1 to form a wedge fit. The elastic adjustment piece 12 forms an elastic support between the two precast block bodies 1. The bottom surface of the precast block body 1 is provided with multi-level height difference compensation protrusions 14, which include first protrusions 141 and second protrusions 142 with different heights. The first protrusions 141 are distributed in the corner area of ​​the bottom surface, and the second protrusions 142 are distributed in the middle area of ​​the bottom surface. The height difference adaptive compensation is achieved by selectively contacting the pad layer. The first protrusion 141 has a frustum-shaped structure with a bottom diameter of 80 mm to 120 mm and a height of 15 mm to 25 mm; the second protrusion 142 has a frustum-shaped structure with a bottom diameter of 60 mm to 100 mm and a height of 8 mm to 15 mm; the first protrusion 141 and the second protrusion 142 have different heights. The top surfaces of the two protrusions 142 are provided with anti-slip textures. A sensor chip 16 is embedded inside the precast block body 1. The sensor chip 16 is located at the geometric center. The sensor chip 16 includes a tilt sensor 161 and a displacement sensor 162. The sensor chip 16 is connected to an external monitoring system through a low-power Bluetooth wireless communication module 163. A flexible connecting strip 17 is provided at the joint between adjacent precast block bodies 1. The flexible connecting strip 17 has a strip structure and a honeycomb structure inside. The two sides are bonded to the sides of the precast block body 1. A grouting channel 171 is provided inside. After the flexible grout is injected and cured, an elastic connecting layer is formed. During operation, when adjacent precast blocks are laid, the side of the later-laid block slides into the interlocking groove along the wedge-shaped surface. The progressive mechanical interlocking of the groove wall achieves automatic centering guidance, eliminating assembly interference caused by manufacturing errors and curvature deviations in traditional straight tenon grooves. The inner wall of the interlocking groove is fixed by an elastic adjustment piece 12 via an embedded connector 13. In its natural state, it maintains a preset gap of 2 to 5 millimeters with the groove wall. Under pressure, it generates controllable elastic deformation. This deformation provides a flexible compensation space of 2 to 5 millimeters for angular deviations between blocks and, through rebound force, forms a continuous and stable lateral clamping force between the blocks. This allows adjacent blocks to interlock without jamming at curvature changes, achieving a flexible interlocking state that is both locked and finely adjustable. The first boss 141 and the second boss 142 form two levels of support surfaces based on their height difference, distributed on the bottom surface. The first protrusion 141 at the corner has a height of 15 mm to 25 mm, and the second protrusion 142 distributed in the central area has a height of 8 mm to 15 mm. During paving, the top surface of the protrusions makes differentiated contact according to the local curvature and undulation of the subgrade: in relatively flat or low curvature areas of the subgrade, the higher first protrusion 141 makes stable contact with the subgrade, and the lower second protrusion 142 provides auxiliary restraint, forming a four-point main support and central auxiliary support structure. In areas with large undulation or high curvature of the subgrade, the first protrusion 141 is embedded deeper into the subgrade to compensate for the height difference, and the second protrusion 142 is moderately disengaged to form a clearance space, so that the posture of the precast block is automatically adjusted to fit the local slope, and the stress on the bottom surface of the block is evenly distributed through the dynamic combination of the two levels of protrusions, avoiding subgrade crushing or block fracture caused by local stress concentration.

[0021] Example 2: Based on Embodiment 1, the paving tool 2 includes a main lever arm 21, an auxiliary adjusting arm 22, and a curvature adaptive slide rail 28. One end of the main lever arm 21 is provided with a gripping part 23 that mates with the top surface of the precast block body 1, and the other end is provided with an operating handle 24. An adjustable support shaft 25 is provided in the middle. The auxiliary adjusting arm 22 is connected to the main lever arm 21 through a hinge node 26, and its free end is provided with a pushing head 27 that mates with the side of the precast block body 1. The curvature adaptive slide rail 28 includes an arc-shaped guide rail 281 and a sliding seat 282. The sliding seat 282 is slidably connected to the arc-shaped guide rail 281 and is provided with... A retractable positioning pin 283 is provided, which engages with the positioning hole 15 on the top surface of the precast block body 1. The gripping part 23 includes two symmetrically arranged clamping claws 231, which are connected to the main lever arm 21 via a spring mechanism 232. Rubber anti-slip pads 233 are provided on the inner surface of the clamping claws 231. The auxiliary adjusting arm 22 rotates in the horizontal plane via a hinge node 26, with a rotation angle range of -30 degrees to +30 degrees. An angle locking mechanism 29 is provided to fix the rotation angle. The radius of curvature of the arc-shaped guide rail 281 is 3000 mm to 8000 mm. The positioning pin 283... The structure is a pneumatic telescopic rod with an extension stroke of 20 mm to 40 mm. A tapered guide head 286 is provided at the end. A positioning pin 283 is connected to a pneumatic control device 285, which controls the extension and retraction of the positioning pin 283. At least two positioning holes 15 are provided on the top surface of the precast block body 1, with a diameter of 12 mm to 18 mm and a depth of 25 mm to 35 mm. A roller 284 is provided at the bottom of the sliding seat 282, and the roller 284 rolls in cooperation with the arc-shaped guide rail 281. The main lever arm 21 uses an adjustable support shaft 25 as a fulcrum, and the lever arm is amplified by the lever arm amplification effect of the operating handle 24. This allows the gripping part 23 to generate a clamping force sufficient to stably hold a 50kg precast block, reducing the intensity of manual handling; the auxiliary adjusting arm 22 rotates ±30 degrees in the horizontal plane through the hinge node 26, and works with the push head 27 to apply lateral force to the side of the precast block to achieve precise translation adjustment of the block, and uses the arc-shaped guide rail 281 with a curvature radius of 3000 mm to 8000 mm to conform to the curvature of the slope, so that the sliding seat 282 naturally follows the curved surface when rolling along the guide rail, and then inserts the pneumatic positioning pin 283 into the positioning hole 15 on the top surface of the precast block through the telescopic action, forming a composite constraint of mechanical positioning and curved surface guidance; A construction method for interlocking precast concrete block curved slopes includes the following steps: S1. Slope base treatment and subbase laying: The curved slope is leveled, a gravel subbase is laid and compacted, and the flatness deviation of the subbase is controlled. S2. Precast Block Layout Design: Based on BIM technology, a digital layout design is carried out. The paving area is divided according to the slope curvature change, and the paving sequence and adjustment joint position of the precast block body 1 are determined. The paving sequence is from the toe of the slope upwards, and the construction is divided into sections with the adjustment joint as the boundary. In step S4, the positioning accuracy is controlled within ±3mm. In step S5, the compression deformation of the elastic adjustment piece 12 is controlled within the elastic deformation range to ensure that the overall smoothness of the paving layer is ≤8mm / m. S3. Precast block grabbing and transfer: Using the paving tool 2, the top surface of the precast block body 1 is clamped by the gripping part 23, and the precast block body 1 is transferred from the stacking area to the paving operation surface by using the lever principle with the support shaft 25 as the fulcrum. S4. Curvature adaptive positioning: Place the curvature adaptive slide rail 28 on the slope, slide the sliding seat 282 along the arc guide rail 281 to adapt to the curvature of the slope, insert the positioning pin 283 into the positioning hole 15 of the precast block body 1 for initial positioning, operate the auxiliary adjustment arm 22 to push the push head 27 to push the side of the precast block body 1 to achieve precise lateral positioning. S5. Wedge-shaped interlocking paving: The side of the adjacent precast block body 1 is inserted into the wedge-shaped interlocking groove 11 of the paved precast block body 1. The elastic adjustment piece 12 is compressed and undergoes elastic deformation to form elastic support and flexible interlocking, and automatically compensates for angle deviation according to the change of slope curvature. S6. Height difference adaptive compensation: The multi-level height difference compensation protrusions 14 on the bottom surface of the precast block body 1 contact the cushion layer. The first protrusion 141 and the second protrusion 142 selectively contact the cushion layer according to the local curvature change. The height difference adaptive compensation is achieved through stepped contact to ensure uniform stress distribution on the bottom surface of the block. In the small curvature slope area, the second protrusion 142 mainly supports the block, while in the large curvature slope area, the first protrusion 141 compensates for the height difference, so that the posture of the precast block body 1 is adaptively adjusted. The slope anti-slip coefficient is ≥1.4 and the water flow erosion resistance is ≥2.5m / s. S7. Joint treatment and connection: Install flexible connecting strip 17 at the joint between adjacent precast block bodies 1, inject flexible grout through grouting channel 171, and form an elastic connection layer after curing. S8. Quality monitoring and control: The tilt angle and displacement data of the precast block body 1 are monitored in real time through the sensor chip 16 and transmitted to the external monitoring system for quality deviation early warning and full-cycle control.

[0022] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An interlocking precast concrete block curved slope construction system, comprising a precast block body (1) and paving tools (2), characterized in that: The precast block body (1) is a rectangular block structure, and wedge-shaped fitting grooves (11) extending along the height direction are respectively provided on its opposite two sides. The width of the groove opening of the wedge-shaped fitting groove (11) is greater than the width of the groove bottom, and the angle between the groove wall and the side is 75 degrees to 85 degrees. An elastic adjustment piece (12) is fixed in the wedge-shaped fitting groove (11) by an embedded connector (13). The free end of the elastic adjustment piece (12) extends towards the groove opening. When two adjacent precast block bodies (1) are laid, the wedge-shaped fitting groove (11) of one precast block body (1) cooperates with the side of the other precast block body (1) to form a wedge-shaped fit. The elastic adjustment piece (12) forms an elastic support between the two precast block bodies (1). The precast block body (1) has a multi-level height difference compensation protrusion (14) on its bottom surface. The multi-level height difference compensation protrusion (14) includes a first protrusion (141) and a second protrusion (142) with different heights. The first protrusion (141) is distributed in the corner area of ​​the bottom surface, and the second protrusion (142) is distributed in the middle area of ​​the bottom surface. The height difference adaptive compensation is achieved by selectively contacting the pad layer. The paving tool (2) includes a main lever arm (21), an auxiliary adjusting arm (22), and a curvature adaptive slide rail (28). One end of the main lever arm (21) is provided with a gripping part (23) that cooperates with the top surface of the precast block body (1), and the other end is provided with an operating handle (24). The middle part is provided with an adjustable support shaft (25). The auxiliary adjusting arm (22) is connected to the main lever arm (21) through a hinge node (26). Its free end is provided with a push head (27) that cooperates with the side of the precast block body (1). The curvature adaptive slide rail (28) includes an arc-shaped guide rail (281) and a sliding seat (282). The sliding seat (282) is slidably connected along the arc-shaped guide rail (281) and is provided with a retractable positioning pin (283). The positioning pin (283) cooperates with the positioning hole (15) on the top surface of the precast block body (1).

2. The interlocking precast concrete block curved slope construction system according to claim 1, characterized in that: The elastic adjustment piece (12) is made of thermoplastic polyurethane with a thickness of 3 mm to 8 mm. The inner wall of the wedge-shaped fitting groove (11) is provided with a plurality of slots with a spacing of 50 mm to 80 mm along the height direction. The elastic adjustment piece (12) is fixed in the slots of different heights by an embedded connector (13). The elastic adjustment piece (12) forms a preset gap of 2 mm to 5 mm with the groove wall in its natural state.

3. The interlocking precast concrete block curved slope construction system according to claim 1, characterized in that: The first boss (141) is a frustum-shaped structure with a bottom diameter of 80 mm to 120 mm and a height of 15 mm to 25 mm; the second boss (142) is a frustum-shaped structure with a bottom diameter of 60 mm to 100 mm and a height of 8 mm to 15 mm; the top surfaces of the first boss (141) and the second boss (142) are provided with anti-slip textures.

4. The interlocking precast concrete block curved slope construction system according to claim 1, characterized in that: The gripping part (23) includes two symmetrically arranged gripping claws (231). The gripping claws (231) are connected to the main lever arm (21) through a spring mechanism (232). The inner side of the gripping claws (231) is provided with a rubber anti-slip pad (233). The auxiliary adjusting arm (22) rotates in the horizontal plane through a hinge node (26). The rotation angle range is -30 degrees to +30 degrees, and an angle locking mechanism (29) is provided to fix the rotation angle.

5. The interlocking precast concrete block curved slope construction system according to claim 1, characterized in that: The radius of curvature of the arc-shaped guide rail (281) is 3000 mm to 8000 mm. The positioning pin (283) is a pneumatic telescopic rod structure with an extension stroke of 20 mm to 40 mm. A tapered guide head (286) is provided at the end. The positioning pin (283) is connected to a pneumatic control device (285). The pneumatic control device (285) is used to control the extension and retraction of the positioning pin (283). The top surface of the precast block body (1) is provided with at least two positioning holes (15) with a diameter of 12 mm to 18 mm and a depth of 25 mm to 35 mm. A roller (284) is provided at the bottom of the sliding seat (282). The roller (284) rolls with the arc-shaped guide rail (281).

6. The interlocking precast concrete block curved slope construction system according to claim 1, characterized in that: The precast block body (1) has a pre-embedded sensor chip (16) inside. The sensor chip (16) is located at the geometric center. The sensor chip (16) includes a tilt sensor (161) and a displacement sensor (162). The sensor chip (16) is connected to an external monitoring system through a low-power Bluetooth wireless communication module (163).

7. The interlocking precast concrete block curved slope construction system according to claim 1, characterized in that: A flexible connecting strip (17) is provided at the joint between adjacent precast block bodies (1). The flexible connecting strip (17) is a strip structure with a honeycomb structure inside. Its two sides are bonded to the sides of the precast block body (1). It is provided with a grouting channel (171) inside. After the flexible grout is injected and cured, an elastic connecting layer is formed.

8. A method for constructing an interlocking precast concrete block curved slope, employing the interlocking precast concrete block curved slope construction system as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1. Slope base treatment and subbase laying: The curved slope is leveled, a gravel subbase is laid and compacted, and the flatness deviation of the subbase is controlled. S2, Precast block layout design: Based on BIM technology, digital layout design is carried out, the paving area is divided according to the change of slope curvature, and the paving sequence and adjustment joint position of the precast block body (1) are determined. S3. Precast block grabbing and transfer: Using the paving tool (2), the top surface of the precast block body (1) is clamped by the gripping part (23), and the precast block body (1) is transferred from the stacking area to the paving operation surface by using the lever principle with the support shaft (25) as the fulcrum. S4. Curvature adaptive positioning: Place the curvature adaptive slide rail (28) on the slope, slide the sliding seat (282) along the arc guide rail (281) to adapt to the curvature of the slope, insert the positioning pin (283) into the positioning hole (15) of the precast block body (1) for preliminary positioning, operate the auxiliary adjustment arm (22) to make the push head (27) push the side of the precast block body (1) to achieve precise lateral positioning; S5, wedge-shaped interlocking paving: The side of the adjacent precast block body (1) is inserted into the wedge-shaped interlocking groove (11) of the paved precast block body (1). The elastic adjustment piece (12) is compressed and undergoes elastic deformation to form elastic support and flexible interlocking, and automatically compensates for angle deviation according to the change of slope curvature. S6, Height difference adaptive compensation: The multi-level height difference compensation boss (14) on the bottom surface of the precast block body (1) contacts the pad layer. The first boss (141) and the second boss (142) selectively contact the pad layer according to the local curvature change. The height difference adaptive compensation is achieved through stepped contact to ensure uniform stress distribution on the bottom surface of the block. S7. Joint treatment and connection: Install flexible connecting strip (17) at the joint between adjacent precast block bodies (1), inject flexible grout through grouting channel (171), and form an elastic connecting layer after curing; S8. Quality monitoring and control: The tilt angle and displacement data of the precast block body (1) are monitored in real time by the sensor chip (16) and transmitted to the external monitoring system for quality deviation early warning and full-cycle control.

9. The interlocking precast concrete block curved slope construction method according to claim 8, characterized in that: In step S2, the paving sequence is from the toe of the slope upwards, and the construction is divided into sections with the adjustment joint as the boundary; in step S4, the positioning accuracy is controlled within ±3mm; in step S5, the compression deformation of the elastic adjustment piece (12) is controlled within the elastic deformation range to ensure that the overall smoothness of the paving layer is ≤8mm / m.

10. The interlocking precast concrete block curved slope construction method according to claim 8, characterized in that: In step S6, the second protrusion (142) mainly supports the slope area with small curvature, while the first protrusion (141) compensates for the height difference in the slope area with large curvature, so that the posture of the precast block body (1) is adaptively adjusted, the slope anti-slip coefficient is ≥1.4, and the water flow scouring strength is ≥2.5m / s.

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