Mountain highway subgrade structure and construction method thereof
By setting up anchor piles and bearing frames in mountainous highway roadbeds, combined with mesh reinforcement layers and embedded steel bars, the problem of traditional prestressed anchoring technology prone to collapse in the base of the roadbed on slope sections is solved, and the stability of the roadbed is achieved Improve sexual performance and long-term safe and stable operation.
Patent Information
- Application Number
- CN202411512602.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-01-10
AI Technical Summary
Traditional prestressed anchoring technology in the base of the roadbed in slope sections of mountain highways is prone to collapse due to geological disasters, resulting in the loss of support at the bottom of the road and collapse, making it difficult to ensure long-term safe and stable operation.
The mesh reinforcement layer, leveling layer and pavement surface layer are laid in sequence from bottom to top, and anchor piles and bearing frames are set up in the roadbed. The anchor piles are fixedly connected to the embedded steel bars, and the bearing frames are buried in the slope section and Fixed with anchor piles, the mesh reinforcement layer is provided through the bearing frame to enhance the overall structural strength and deformation resistance of the roadbed.
It effectively improves the stability of the roadbed on the slope section, prevents collapse caused by geological disasters, ensures long-term safe and stable operation of the road, and improves the fixing effect and bearing capacity of the bearing frame through the use of prestressed bolts and cables.
Smart Images
Figure CN119287728A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of road construction, and in particular to a mountain highway subgrade structure and a construction method thereof. Background Art
[0002] In mountain highway construction, due to the complex and changeable geological conditions, especially in areas with poor rock and soil stability, traditional roadbed treatment methods are difficult to ensure long-term safe and stable operation. With the continuous growth of traffic demand, how to improve the capacity and durability of mountain roads has become one of the key issues that need to be solved urgently.
[0003] At present, the main method for treating the roadbed of mountainous roads is prestressed anchoring technology, which is used to enhance the stability and bearing capacity of the road by setting anchoring structures such as anchor piles inside the roadbed. However, although the traditional prestressed anchoring technology can improve the stability of the road structure to a certain extent, in actual application, the rock and soil layer at the bottom of the roadbed on the slope section is prone to collapse due to geological disasters, resulting in leakage at the bottom of the road, causing the bottom of the road to lose support and collapse. Summary of the invention
[0004] In view of the problems existing in the prior art, the present application provides a mountain highway subgrade structure and a construction method thereof.
[0005] In the first aspect, the present application provides a mountain highway subgrade structure, which adopts the following technical solution: A roadbed structure for a mountain highway comprises a mesh reinforcement layer, a leveling layer and a road surface layer laid in sequence from bottom to top, and a plurality of anchor piles arranged in the roadbed, wherein the anchor piles are used to be fixed in the rock layer at the bottom of the roadbed, the mesh reinforcement layer adopts a concrete structure, and a plurality of pre-buried steel bars are embedded in the mesh reinforcement layer, each of the pre-buried steel bars is bound and fixed to each other, pre-stressed steel bars are pre-buried on the anchor piles, and the pre-buried steel bars are fixedly connected to the pre-stressed steel bars, a load-bearing frame is buried in the roadbed located at a road slope section, the load-bearing frame is arranged on a side of the anchor pile close to the road slope, a fixing mechanism for fixing the load-bearing frame is fixedly arranged on the anchor pile, and the mesh reinforcement layer is overlapped on the load-bearing frame.
[0006] Optionally, the support frame includes a crossbeam and a plurality of support rods, the support rods are fixed to the crossbeam by bolts, the fixing mechanism is used to fix the support rods on the anchor piles, and the mesh reinforcement is arranged on the crossbeam.
[0007] Optionally, the fixing mechanism includes a support frame, a fixing assembly and a mounting sleeve, the fixing assembly is used to fix the support frame on the anchor pile, the mounting sleeve is fixedly disposed on the support frame, and the mounting sleeve is adapted to the support rod, and the support rod is fixed in the mounting sleeve.
[0008] Optionally, the fixing assembly includes a first clamping frame, a second clamping frame and a tension screw, the first clamping frame is fixed on the support frame, both ends of the tension screw are provided with external threads, and both ends of the tension screw are adapted with nuts, the first clamping frame is provided with a first through hole for the tension screw to pass through, the second clamping frame is provided with a second through hole for the tension screw to pass through, and the first clamping frame and the second clamping frame are both provided with clamping grooves for clamping anchor piles.
[0009] Optionally, prestressed bolts are embedded in the side walls of the anchor piles, mounting holes for the prestressed bolts to pass through are opened on the support frame, and nuts are adapted for the prestressed bolts.
[0010] Optionally, the first clamping frame and the second clamping frame are both installed above the prestressed bolts, and a prestressed cable is connected to the second clamping frame, and the other end of the prestressed cable is connected to the crossbeam.
[0011] Optionally, a rib plate is fixedly provided on the support frame, and the rib plate is fixedly connected to the mounting sleeve.
[0012] Optionally, a plurality of anchor rods are fixedly provided on the top of the cross beam, and the anchor rods are passed through the mesh reinforcement layer.
[0013] Optionally, a gravel cushion layer is laid on the bottom of the support frame.
[0014] In a second aspect, the present application provides a construction method for a mountain highway subgrade structure, which adopts the following technical solution: A construction method for a mountain highway subgrade structure comprises the following steps: S1. Preliminary preparation: On-site survey to obtain accurate topographic data, formulate a construction plan, and determine the boundaries of the operating area and the layout of pile positions based on surveying and setting out; S2, roadbed excavation: start the excavator to dig the road contour line of specified width and depth; S3. Anchor pile construction: Use drilling equipment to drill pile holes of sufficient depth at the marked pile positions, and construct anchor piles in each pile hole; S4, construction of the bearing frame: after the anchor pile construction is completed, a certain tunnel is excavated in the roadbed of the slope section, and the tunnel is set on the side of the anchor pile close to the road slope. After that, the bearing frame is constructed and installed in the tunnel, and the bearing frame is fixed to the anchor pile; S5. Construction of gravel cushion layer: After the construction of the bearing frame is completed, gravel is filled into the tunnel and compacted to form a gravel cushion layer; S6. Construction of mesh reinforcement layer: pre-buried steel bars are laid on the top of each anchor pile in the roadbed. Each pre-buried steel bar is combined into a mesh structure and tied and fixed to each other. The pre-buried steel bars are welded and fixed to the prestressed steel bars on the anchor piles. After that, concrete is poured in the roadbed to form a mesh reinforcement layer. The pre-buried steel bars are buried in the mesh reinforcement layer. The mesh reinforcement layer is overlapped on the bearing frame. S7, leveling layer construction: after the mesh surface reinforcement layer is completed, pour cement stabilized concrete on the top of the mesh surface reinforcement layer to form a leveling layer, and make the top of the leveling layer flat; S8. Pavement surface construction: construct and lay the pavement surface on top of the leveling layer.
[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application sets anchor piles and mesh reinforcement layers in the roadbed, so that the embedded steel bars in the mesh reinforcement layer are fixedly connected with the prestressed steel bars on the anchor piles, thereby enhancing the overall structural strength and deformation resistance of the roadbed. At the same time, a load-bearing frame is set in the roadbed of the slope section of the road, and the load-bearing frame is firmly connected with the anchor piles. The load-bearing frame provides support for the mesh reinforcement layer, thereby effectively improving the stability of the roadbed of the slope section, preventing the bottom of the road from collapsing due to loss of support when the rock and soil layer at the bottom of the slope section of the road collapses due to geological disasters, thereby ensuring the long-term safe and stable operation of the road.
[0016] 2. The present application embeds prestressed bolts on the side walls of the anchor piles. When the support frame is fixed to the anchor piles, the prestressed bolts are passed through the mounting holes on the support frame, and nuts are threadedly connected to the prestressed bolts, thereby improving the fixing effect of the support frame and thereby improving the structural stability of the load-bearing frame.
[0017] 3. The present application further improves the load-bearing capacity and anti-deformation ability of the support frame by connecting the prestressed cable to the second clamping frame and fixing the other end of the prestressed cable to the crossbeam. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 yes Figure 1 A magnified view of part A; Figure 3 It is a schematic diagram of the structure of the load-bearing frame used in the embodiment of the present application; Figure 4 It is a structural schematic diagram used to express the fixing mechanism in an embodiment of the present application.
[0019] Explanation of the reference numerals in the accompanying drawings: 1. mesh reinforcement layer; 11. embedded steel bars; 2. leveling layer; 3. pavement surface layer; 4. anchor piles; 41. prestressed steel bars; 42. prestressed bolts; 5. load-bearing frame; 51. crossbeam; 511. anchor rods; 52. support rods; 6. gravel cushion layer; 7. support frame; 71. mounting sleeve; 72. first clamping frame; 73. second clamping frame; 74. tension screws; 75. ribs; 76. prestressed cables. DETAILED DESCRIPTION
[0020] The following will be combined with the attached Figure 1 -Attached Figure 4 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.
[0021] The inventor of this application has found that although the traditional prestressed anchoring technology can improve the stability of the belt road structure to a certain extent, in actual application, the rock and soil layer at the bottom of the roadbed at the slope section is prone to collapse due to geological disasters, resulting in leakage at the bottom of the road, causing the bottom of the road to lose its supporting capacity. To this end, this application discloses a mountain highway roadbed structure, which mainly adopts the following scheme: The present application embodiment discloses a roadbed structure for a mountain highway. Figure 1 , including a mesh reinforcement layer 1, a leveling layer 2 and a road surface layer 3 laid in sequence from bottom to top, and a plurality of anchor piles 4 arranged in the roadbed, the anchor piles 4 are used to be fixed in the rock layer at the bottom of the roadbed, and the tops of the anchor piles 4 are fixedly connected to the mesh reinforcement layer 1, the leveling layer 2 is cast by cement stabilized concrete, and the road surface layer 3 is paved with asphalt concrete or cement sand and gravel concrete.
[0022] Reference Figure 1 The anchor pile 4 adopts a reinforced concrete structure. The anchor pile 4 can be prefabricated in a factory or on a construction site before being installed; it can also be formed on site by pouring concrete. When forming by pouring concrete on site, a sufficiently deep pile hole is first drilled at the calibrated pile position using a drilling device, a steel cage is placed in the pile hole, and then cement mortar is poured into the pile hole to form the anchor pile 4.
[0023] Reference Figure 1 , 2Prestressed steel bars 41 are embedded in the side wall of the anchor pile 4 near the top. The prestressed steel bars 41 and the steel bars inside the anchor pile 4 are tied or welded to each other. The mesh reinforcement layer 1 adopts a concrete structure, and a plurality of embedded steel bars 11 are embedded in the mesh reinforcement layer 1. The embedded steel bars 11 are tied and fixed to each other to form a combined mesh structure. The prestressed steel bars 41 on the anchor pile 4 and the embedded steel bars 11 are tied or welded to each other.
[0024] Reference Figure 1 , 3 The support frame 5 is buried in the roadbed of the road slope section, and the support frame 5 is arranged on the side of the anchor pile 4 close to the road slope, and the support frame 5 is fixed on the anchor pile 4 located on the side of the road. When the support frame 5 is constructed and installed, a certain tunnel is excavated in the roadbed of the slope section, and the tunnel is located on the side of the anchor pile 4 close to the road slope, and the anchor pile 4 on the side of the road is exposed in the tunnel, so as to facilitate the construction and installation of the support frame 5. After the construction of the support frame 5 is completed, gravel is filled in the tunnel and compacted to form a gravel cushion layer 6, which provides certain support for the support frame 5 and increases the structural strength of the rock and soil layer at the bottom of the support frame 5 to a certain extent; when the mesh reinforcement layer 1 is constructed, the mesh reinforcement layer 1 is overlapped on the support frame 5, and the mesh reinforcement layer 1 is supported by the support frame 5, so as to achieve the effect of enhancing the overall structural strength and deformation resistance of the roadbed, so that the roadbed can still maintain high stability when geological disasters occur.
[0025] Reference Figure 3 The support frame 5 includes a cross beam 51 and a plurality of support rods 52 fixed to the cross beam 51 by bolts, and the support rods 52 correspond to the anchor piles 4 located on the side of the road one by one and are fixed on the corresponding anchor piles 4. The support frame 5 is formed by splicing and fixing the cross beam 51 and the support rods 52 by bolts, which facilitates the transportation and installation of the support frame 5.
[0026] Reference Figure 3 By fixing a plurality of anchor rods 511 on the top of the cross beam 51 and passing the anchor rods 511 through the mesh reinforcement layer 1, the connection strength between the mesh reinforcement layer 1 and the support frame 5 is improved; during actual construction, the anchor rods 511 on the top of the cross beam 51 and the embedded steel bars 11 in the mesh reinforcement layer 1 can also be fixed by binding or welding.
[0027] Reference Figure 4A fixing mechanism for fixing the support rod 52 is provided on the anchor pile 4, and the fixing mechanism includes a support frame 7, a fixing assembly and a mounting sleeve 71. The fixing assembly is used to fix the support frame 7 on the anchor pile 4, and specifically includes a first clamping frame 72, a second clamping frame 73 and a tension screw 74. The first clamping frame 72 is fixed on the support frame 7, and both ends of the tension screw 74 are provided with external threads, and both ends of the tension screw 74 are adapted with nuts. The first clamping frame 72 is provided with a plurality of first through holes for the tension screw 74 to pass through, and the second clamping frame 73 is provided with a plurality of second through holes for the tension screw 74 to pass through. The first through holes on the first clamping frame 72 correspond to the second through holes on the second clamping frame 73 one by one, and the first clamping frame 72 and the second clamping frame 73 are both provided with clamping grooves for clamping the anchor pile 4.
[0028] Reference Figure 4 The mounting sleeve 71 is fixedly arranged on the support frame 7, and the mounting sleeve 71 is adapted to the support rod 52, the support rod 52 is passed through the mounting sleeve 71 and is welded and fixed to the mounting sleeve 71, and a rib plate 75 is fixedly arranged on the support frame 7, and the rib plate 75 is fixedly connected to the mounting sleeve 71.
[0029] Reference Figure 4 Prestressed bolts 42 are embedded in the side walls of the anchor piles 4, and the prestressed bolts 42 are welded and fixed to the steel bars inside the anchor piles 4. Mounting holes for the prestressed bolts 42 to pass through are opened on the support frame 7, and nuts are adapted for the prestressed bolts 42. By embedding the prestressed bolts 42 in the side walls of the anchor piles 4, when the support frame 7 is fixed to the anchor piles 4, the prestressed bolts 42 are passed through the mounting holes on the support frame 7, and nuts are threadedly connected to the prestressed bolts 42, thereby improving the fixing effect of the support frame 7, thereby improving the structural stability of the load-bearing frame 5.
[0030] Reference Figure 4 The first clamping frame 72 and the second clamping frame 73 are both installed above the prestressed bolt 42. The second clamping frame 73 is connected with a prestressed cable 76, and the other end of the prestressed cable 76 is connected to the cross beam 51. Specifically, the prestressed cable 76 can be a steel strand with a diameter of 12mm to 20mm, and its preload force is also adjustable; the second clamping frame 73 can be made of a steel plate with a thickness of 8mm to 12mm, and the prestressed cable 76 is fixed to the second clamping frame 73 by welding or clamping, and the other end is also connected to the cross beam 51 by welding or clamping, so as to further increase the bearing capacity and anti-deformation ability of the support frame 5.
[0031] The implementation principle of the roadbed structure of a mountain highway in an embodiment of the present application is as follows: by arranging anchor piles 4 and a mesh reinforcement layer 1 in the roadbed, the embedded steel bars 11 in the mesh reinforcement layer 1 are fixedly connected with the prestressed steel bars 41 on the anchor piles 4, thereby enhancing the overall structural strength and deformation resistance of the roadbed. At the same time, by arranging a load-bearing frame 5 in the roadbed of the road slope section, and firmly connecting the load-bearing frame 5 with the anchor piles 4, the load-bearing frame 5 provides support for the mesh reinforcement layer 1, thereby effectively improving the stability of the roadbed of the slope section, preventing the bottom of the road from collapsing due to loss of support when the rock and soil layer at the bottom of the road slope section collapses due to geological disasters, thereby ensuring the long-term safe and stable operation of the road.
[0032] The present application also discloses a method for constructing a roadbed structure in a mountainous area, comprising the following steps: S1. Preliminary preparation: On-site survey to obtain accurate topographic data, formulate a construction plan, and determine the boundaries of the operating area and the layout of pile positions based on surveying and setting out; S2, roadbed excavation: start the excavator to dig the road contour line of specified width and depth; S3, construction of anchor piles 4: using drilling equipment to drill pile holes of sufficient depth at the marked pile positions, and constructing anchor piles 4 in each pile hole; S4, construction of the support frame 5: after the anchor pile 4 is formed, a certain tunnel is excavated in the roadbed of the slope section, and the tunnel is set on the side of the anchor pile 4 close to the road slope. After that, the support frame 5 is constructed and installed in the tunnel, and the support frame 5 is fixed to the anchor pile 4; S5, construction of crushed stone cushion layer 6: after the construction of the support frame 5 is completed, crushed stones are filled into the tunnel and compacted to form a crushed stone cushion layer 6; S6, construction of mesh reinforcement layer 1: pre-embedded steel bars 11 are laid on the top of each anchor pile 4 in the roadbed, each pre-embedded steel bar 11 is combined into a mesh structure and tied and fixed to each other, the pre-embedded steel bars 11 are welded and fixed to the prestressed steel bars 41 on the anchor pile 4, and then concrete is poured in the roadbed to form a mesh reinforcement layer 1, and the pre-embedded steel bars 11 are buried in the mesh reinforcement layer 1, and the mesh reinforcement layer 1 is overlapped on the support frame 5; S7, construction of leveling layer 2: after the construction of mesh surface reinforcement layer 1 is completed, cement stabilized concrete is poured on the top of mesh surface reinforcement layer 1 to form leveling layer 2, and the top of leveling layer 2 is made flat; S8. Construction of pavement surface layer 3: construct and lay the pavement surface layer 3 on top of the leveling layer 2.
[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A roadbed structure for a mountainous highway, characterized in that: The invention comprises a mesh surface reinforcement layer (1), a leveling layer (2) and a road surface layer (3) which are laid in sequence from bottom to top, and a plurality of anchor piles (4) arranged in the roadbed, wherein the anchor piles (4) are used to be fixed in the rock layer at the bottom of the roadbed, the mesh surface reinforcement layer (1) adopts a concrete structure, and the mesh surface reinforcement layer (1) is embedded with a plurality of pre-embedded steel bars (11), and each of the pre-embedded steel bars (11) is bound and fixed to each other, a pre-stressed steel bar (41) is pre-embedded on the anchor pile (4), and the pre-embedded steel bar (11) is fixedly connected to the pre-stressed steel bar (41), a bearing frame (5) is embedded in the roadbed located at a road side slope section, and the bearing frame (5) is arranged on a side of the anchor pile (4) close to the road side slope, and a fixing mechanism for fixing the bearing frame (5) is fixedly arranged on the anchor pile (4), and the mesh surface reinforcement layer (1) is overlapped on the bearing frame (5).
2. A mountain highway subgrade structure according to claim 1, characterized in that: The support frame (5) comprises a crossbeam (51) and a plurality of support rods (52); the support rods (52) and the crossbeam (51) are fixed by bolts; the fixing mechanism is used to fix the support rods (52) on the anchor piles (4); and the mesh reinforcement is arranged on the crossbeam (51).
3. A mountain highway subgrade structure according to claim 2, characterized in that: The fixing mechanism comprises a support frame (7), a fixing assembly and a mounting sleeve (71); the fixing assembly is used to fix the support frame (7) on the anchor pile (4); the mounting sleeve (71) is fixedly arranged on the support frame (7); the mounting sleeve (71) is adapted to the support rod (52); and the support rod (52) is fixed in the mounting sleeve (71).
4. A mountain highway subgrade structure according to claim 3, characterized in that: The fixing assembly includes a first clamping frame (72), a second clamping frame (73) and a tension screw (74); the first clamping frame (72) is fixed on the support frame (7); both ends of the tension screw (74) are provided with external threads, and both ends of the tension screw (74) are adapted with nuts; the first clamping frame (72) is provided with a first through hole for the tension screw (74) to pass through; the second clamping frame (73) is provided with a second through hole for the tension screw (74) to pass through; and the first clamping frame (72) and the second clamping frame (73) are both provided with clamping grooves for clamping anchor piles (4).
5. A mountain highway subgrade structure according to claim 4, characterized in that: Prestressed bolts (42) are pre-buried on the side walls of the anchor piles (4), mounting holes for the prestressed bolts (42) to pass through are provided on the support frame (7), and nuts are adapted to fit on the prestressed bolts (42).
6. A mountain highway subgrade structure according to claim 5, characterized in that: The first clamping frame (72) and the second clamping frame (73) are both installed above the prestressed bolt (42); the second clamping frame (73) is connected to a prestressed cable (76); the other end of the prestressed cable (76) is connected to the crossbeam (51).
7. A mountain highway subgrade structure according to claim 3, characterized in that: A rib plate (75) is fixedly arranged on the support frame (7), and the rib plate (75) is fixedly connected to the mounting sleeve (71).
8. A mountain highway subgrade structure according to claim 2, characterized in that: A plurality of anchor rods (511) are fixedly arranged on the top of the crossbeam (51), and the anchor rods (511) are inserted into the mesh surface reinforcement layer (1).
9. A mountain highway subgrade structure according to claim 1, characterized in that: The bottom of the support frame (5) is paved with a crushed stone cushion layer (6).
10. A construction method for a mountain highway subgrade structure according to claim 9, characterized in that: The following steps are involved: S1. Preliminary preparation: On-site survey to obtain accurate topographic data, formulate a construction plan, and determine the boundaries of the operating area and the layout of pile positions based on surveying and setting out; S2, roadbed excavation: start the excavator to dig the road contour line of specified width and depth; S3, anchor pile (4) construction: using drilling equipment to drill a pile hole of sufficient depth at the marked pile position, and constructing anchor piles (4) in each pile hole; S4, construction of the support frame (5): after the construction of the anchor pile (4) is completed, a certain tunnel is excavated in the roadbed of the slope section, and the tunnel is set on the side of the anchor pile (4) close to the road slope. After that, the support frame (5) is constructed and installed in the tunnel, and the support frame (5) is fixed to the anchor pile (4); S5, construction of crushed stone cushion layer (6): after the construction of the support frame (5) is completed, crushed stones are filled into the tunnel and compacted to form a crushed stone cushion layer (6); S6, construction of the mesh reinforcement layer (1): pre-buried steel bars (11) are laid in the roadbed and on the top of each anchor pile (4), each pre-buried steel bar (11) is combined into a mesh structure and tied and fixed to each other, the pre-buried steel bars (11) are welded and fixed to the prestressed steel bars (41) on the anchor pile (4), and then concrete is poured in the roadbed to form a mesh reinforcement layer (1), and the pre-buried steel bars (11) are buried in the mesh reinforcement layer (1), and the mesh reinforcement layer (1) is overlapped on the support frame (5); S7, construction of the leveling layer (2): after the construction of the mesh surface reinforcement layer (1) is completed, cement stabilized concrete is poured on the top of the mesh surface reinforcement layer (1) to form a leveling layer (2), and the top of the leveling layer (2) is made flat; S8, construction of the pavement surface layer (3): constructing and laying the pavement surface layer (3) on top of the leveling layer (2).