Road base construction method

Abstract

This invention discloses a method for constructing a road base course, comprising: Step 1, removing debris from the surface of the original road base course and horizontally pressing and inserting steel pipe piles from the outside to the inside of the original road base course; Step 2, leveling the surface of the original road base course and setting a drainage layer on the filled surface; Step 3, setting a surface support layer on the surface of the drainage layer; Step 4, setting a surface wear layer on the surface of the surface support layer. This invention can effectively repair subsided road base courses, and by reinforcing the surface layer, it improves strength, increases the stability of the road base course, ensures the structural strength of the road base course, and extends the service life of the road base course.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology. More specifically, this invention relates to a method for constructing a road base course. Background Technology

[0002] The road base course is a multi-layered structure constructed on the roadbed surface using a single material and specific technical measures. The surface course not only bears the loads from vehicle wheels but is also affected by natural environmental factors; therefore, the quality of its materials directly impacts the road surface's quality and performance. Over long-term use, highways often experience uneven thicknesses between the surface course and base course in certain sections, or severe subsidence in high embankment sections. Simply patching or paving with machinery cannot fundamentally solve these problems, leading to increased maintenance and repair workload in the long run. Summary of the Invention

[0003] This invention provides a method for constructing a road base course, which can effectively repair a subsided road base course, increase its strength by reinforcing the surface layer, enhance the stability of the road base course, ensure the structural strength of the road base course, and extend its service life.

[0004] To achieve these objectives and other advantages according to the present invention, a method for constructing a road base course is provided, comprising:

[0005] Step 1: Remove debris from the surface of the original road base layer, and horizontally press and insert steel pipe piles from the outside to the inside of the original road base layer. The steel pipe piles are distributed at different heights.

[0006] Step 2: Fill the original road base surface and set a water-repellent layer on the filled surface. The water-repellent layer includes an asphalt waterproof coating, a geomembrane layer, and a geotextile layer arranged from bottom to top.

[0007] Step 3: Set a surface support layer on the surface of the hydrophobic layer. Specifically, first embed a support steel frame, and then pour asphalt concrete.

[0008] Step four: Set a surface wear layer on the surface of the surface support layer. Specifically, set a top plate on the outside of the original road base layer, pour cement concrete on the outside of the top plate, reserve a drainage ditch on the inside of the top plate, connect the drainage ditch to the municipal drainage pipe through a conduit, and pour asphalt mastic aggregate mixture on the surface of the surface support layer to form a new road surface.

[0009] Preferably, in step one, the head of the steel pipe pile is connected to a conical end and the tail is connected to a drainage end. The surface of the steel pipe pile is provided with water-permeable holes, the interior of the steel pipe pile is filled with sand and gravel, and the drainage end of the steel pipe is connected to the municipal drainage pipeline through a conduit.

[0010] Preferably, in step one, the driving pile is first horizontally pressed from the outside to the inside by a power mechanism and then the steel pipe pile is driven into the driving pile to a predetermined depth by the power mechanism and then pulled out.

[0011] Preferably, in step three, the supporting steel frame includes an outer square-shaped first frame and an inner square-shaped second frame. Each rod of the first frame extends downward into multiple third frames, and each rod of the second frame extends upward into multiple fourth frames.

[0012] Preferably, in step four, a tightening block is provided on the upper inner side of the tightening plate. The tightening block has a threaded groove running through it in the horizontal direction. The internal threads of a pair of threaded grooves are opposite in direction. The screw has symmetrical reverse threads that cooperate with a pair of threaded grooves. The pair of threaded grooves are connected by the screw. The screw rotates under the drive of the power mechanism, causing the pair of tightening blocks to move towards each other to the inner side of the tightening plate to tighten the original road base. The power mechanism is then removed. Asphalt mastic macadam mixture is poured into the inner side of the tightening block, and cement concrete is poured into the outer side of the tightening plate.

[0013] Preferably, in step four, a workbench is set up, and the two ends of the screw are detachably suspended on the workbench via a bracket. A bearing seat is set at the center of the bracket, and a fixed shaft is set on the bearing seat. A Y-shaped connecting fork and a U-shaped connecting frame are respectively rotatably sleeved on the fixed shaft. The connecting fork and the connecting frame are respectively rotatably connected to the top of a pair of clamping blocks via a rotating shaft. The screw is rotated under the drive of the power mechanism until the pair of clamping blocks reach the predetermined position. The power mechanism is then removed, and the workbench, bearing seat, bracket, connecting fork, and connecting frame are removed.

[0014] The present invention has at least the following beneficial effects:

[0015] First, this invention strengthens the original road base by setting steel pipe piles, top plates, cement concrete, asphalt concrete, and asphalt mastic aggregate mixtures to reinforce the internal, external, and top layers of the road base. This effectively repairs the subsided road base and increases its strength by reinforcing the surface layer, thereby enhancing the stability of the road base, ensuring its structural strength, and extending its service life.

[0016] Secondly, after the surface debris of the original road base is removed, the subsidence area of ​​the road base can be better detected. Steel pipe piles are driven in according to the unevenness of the subsidence area. The size and length of the steel pipe piles can be selected as needed to raise the original road base to near flatness, and then finely fill it. A drainage layer is set, that is, first a coating is set, then an HDPE geomembrane is set, and finally an HDPE geotextile is set. The tight connection achieves a good seepage prevention effect. A new surface layer is set, including a surface support layer and a surface wearing layer. The surface support layer has a pre-embedded support steel frame to provide better support. The surface wearing layer includes a top plate, which covers the original road base. Cement concrete is poured on the outside of the top plate to further prevent the roadbed from collapsing. Asphalt mastic crushed stone mixture is poured on the inside of the top plate to further strengthen the structural strength of the surface layer.

[0017] Third, designing the steel pipe piles as a conical structure reduces the resistance of the steel pipe piles during extrusion. The permeable holes allow seepage water from the original road base to drain away through the drainage end, and the gravel enhances the strength of the steel reinforcement. The steel pipe piles are extruded into the original road base. A power mechanism can be used to drive the piles horizontally, and then another power mechanism can be used to convey the steel pipe piles horizontally via rollers before extraction and protection of the piles. The first and second frames of the supporting steel reinforcement form a grid-like structure, with a third frame below and a fourth frame above, increasing the contact area with the asphalt concrete and improving the mechanical strength of the surface support layer.

[0018] Fourth, before tightening, the tightening plate can be temporarily fixed. A tightening block is installed on the upper part of the tightening plate, pressing it onto the surface support layer. The tightening plates clamp the original road base layer by screwing a pair of tightening blocks to a bolt. Then, pour concrete on the inside of the tightening blocks and the outside of the tightening plates to form a reinforced and protective effect. A workbench is set up to install the bolt and tightening blocks, allowing the power mechanism to guide the horizontal, opposing movement of the pair of tightening blocks when driving the bolt. This ensures that when the pair of tightening blocks move to the appropriate position, the pair of tightening plates clamp the original road base layer. After removing the power mechanism, workbench, and other components, the bolt is poured concrete together to further improve the mechanical strength of the surface wear layer.

[0019] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one technical solution of the present invention. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] like Figure 1 As shown, the present invention provides a method for constructing a road base course, comprising:

[0025] Step 1: Remove debris from the surface of the original road base course 6, and horizontally press and insert steel pipe piles 1 from the outside to the inside of the original road base course 6. The steel pipe piles 1 are distributed at different heights.

[0026] Step 2: Fill the surface of the original road base 6 and set a water-repellent layer 2 on the filled surface. The water-repellent layer 2 includes an asphalt waterproof coating, a geomembrane layer and a geotextile layer arranged from bottom to top.

[0027] Step 3: Set a surface support layer on the surface of the hydrophobic layer 2. Specifically, first embed the support steel frame 4, and then pour asphalt concrete 3.

[0028] Step four: Set a surface wear layer on the surface of the surface support layer. Specifically, set a top plate 5 on the outside of the original road base 6, pour cement concrete 9 on the outside of the top plate 5, reserve the position of drainage ditch 7 on the inside of the top plate 5, the drainage ditch 7 is connected to the municipal drainage pipe through a conduit, and pour asphalt mastic macadam mixture 8 on the surface of the surface support layer to form a new road surface.

[0029] In the above technical solution, the original road base 6 is reinforced internally, externally, and top-mounted by setting steel pipe piles 1, top clamping plates 5, cement concrete 9, asphalt concrete 3, and asphalt mastic aggregate mixture 8. This can effectively repair the subsided road base, increase the strength of the surface layer, enhance the stability of the road base, ensure the structural strength of the road base, and extend the service life of the road base.

[0030] After the surface debris of the original road base 6 is removed, the subsidence area of ​​the road base can be better detected. Steel pipe piles 1 are driven in according to the unevenness of the subsidence area. The size and length of the steel pipe piles 1 can be selected as needed to raise the original road base 6 to near flatness. Fine filling is then carried out, and a drainage layer 2 is set. That is, a coating is set first, then an HDPE geomembrane is set, and finally an HDPE geotextile is set. The tight connection achieves a better seepage prevention effect. A new surface layer is set, including a surface support layer and a surface wearing layer. The surface support layer has a pre-embedded support steel frame 4 to provide better support. The surface wearing layer includes a top plate 5, which covers the original road base 6. Cement concrete 9 is poured on the outside of the top plate 5 to further prevent the roadbed from collapsing. Asphalt mastic crushed stone mixture 8 is poured on the inside of the top plate 5 to further strengthen the structural strength of the surface layer.

[0031] In another technical solution, in step one, the head of the steel pipe pile 1 is connected to a conical end, and the tail is connected to a drainage end. The surface of the steel pipe pile 1 is provided with permeable holes, and the interior of the steel pipe pile 1 is filled with sand and gravel. The drainage end of the steel pipe is connected to a municipal drainage pipe through a conduit. Designing the steel pipe pile 1 as a conical structure helps reduce the resistance of the steel pipe pile 1 under pressure. The permeable holes allow seepage water from the original road base layer 6 to be drained away through the drainage end, and the sand and gravel can improve the strength of the newly installed structure.

[0032] In another technical solution, in step one, a power mechanism is first used to horizontally press and drive the penetration pile inward from the outside of the original road base 6. Then, the power mechanism is used to drive the steel pipe pile 1 into the penetration pile to a predetermined depth, and then the penetration pile is pulled out. The steel pipe pile 1 is pressed and driven into the original road base 6. This can be done by using a power mechanism to drive the penetration pile horizontally, and then using a roller conveyor to drive the steel pipe pile 1 horizontally, before pulling it out and protecting the steel pipe pile 1.

[0033] In another technical solution, in step three, the supporting steel reinforcement frame 4 includes an outer, U-shaped first frame and an inner, grid-like second frame. Each member of the first frame extends downwards into multiple third frames, and each member of the second frame extends upwards into multiple fourth frames. The first and second frames of the supporting steel reinforcement frame 4 form a grid-like structure, and the downward and upward placement of the third and fourth frames increases the contact area with the asphalt concrete 3, thereby improving the mechanical strength of the surface support layer.

[0034] In another technical solution, in step four, a tightening block 11 is provided on the upper inner side of the tightening plate 5. The tightening block 11 has a threaded groove running through it in the horizontal direction. The internal threads of a pair of threaded grooves are opposite in direction. The screw 10 is symmetrically provided with reverse threads that cooperate with a pair of threaded grooves. The pair of threaded grooves are connected by the screw 10. The screw 10 rotates under the drive of the power mechanism, causing the pair of tightening blocks 11 to move towards each other to the inner side of the tightening plate 5 to tighten the original road base layer 6. The power mechanism is then removed. Asphalt mastic crushed stone mixture 8 is poured into the inner side of the tightening block 11, and cement concrete 9 is poured into the outer side of the tightening plate 5. Before tightening, the tightening plate 5 can be temporarily fixed. The upper part of the tightening plate 5 is equipped with a tightening block 11, which is pressed on the surface support layer. The pair of tightening plates 5 are clamped to the original road base layer 6 by screwing the bolts 10 to the tightening blocks 11. On this basis, the pouring operation is carried out on the inner side of the tightening block 11 and the outer side of the tightening plate 5 to form a reinforcement and protection effect.

[0035] In another technical solution, in step four, a workbench is set up, and the two ends of the screw 10 are detachably suspended on the workbench via a bracket. A bearing seat is set at the center of the bracket, and a fixed shaft is set on the bearing seat. A Y-shaped connecting fork and a U-shaped connecting frame are respectively rotatably sleeved on the fixed shaft. The connecting fork and the connecting frame are respectively rotatably connected to the top of a pair of clamping blocks 11 via a rotating shaft. The screw 10 is rotated under the drive of the power mechanism until the pair of clamping blocks 11 reach the predetermined position. The power mechanism is then removed, as are the workbench, bearing seat, bracket, connecting fork, and connecting frame. Setting up the workbench to install the screw 10 and clamping blocks 11 allows the power mechanism to guide the pair of clamping blocks 11 to move horizontally in opposite directions in an orderly manner when driving the screw 10 to rotate. This ensures that when the pair of clamping blocks 11 move to the appropriate position, the pair of clamping plates 5 clamp the original road base layer 6. After removing the power mechanism, workbench, and other components, the screw 10 is cast together to better improve the mechanical strength of the surface wear layer.

[0036] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0037] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method of constructing a road base, characterised by, The utility model relates to a kind of road pavement structure and construction method thereof. Step one, remove the sundries on the surface of the original road pavement base, extrude the steel pipe pile horizontally from the outside to the inside of the original road pavement base, and the steel pipe pile is distributed at different heights. Step two, fill the surface of the original road pavement base, set a water-repellent layer on the filled surface, and the water-repellent layer comprises asphalt waterproof coating, geomembrane layer and geotextile layer from bottom to top. Step three, set a surface layer support layer on the surface of the water-repellent layer, specifically, embed the support steel reinforcement frame first, and then pour asphalt concrete. Step four, set a surface layer wearing layer on the surface of the surface layer support layer, specifically, set a pressing plate on the outside of the original road pavement base, pour cement concrete on the outside of the pressing plate, and reserve the position of the drainage ditch on the inside of the pressing plate, the drainage ditch is communicated with the municipal drainage pipeline through the conduit, pour asphalt mastic chip mixture on the surface of the surface layer support layer to form a new pavement.

2. The method of claim 1, wherein In step one, the head of the steel pipe pile is connected with a tapered end, the tail is connected with a drainage end, the surface of the steel pipe pile is provided with water-permeable holes, the inside of the steel pipe pile is filled with sand and stone, and the drainage end of the steel pipe is communicated with the municipal drainage pipeline through the conduit.

3. The method of claim 2, wherein the step of applying the tack coat is performed after the step of applying the base coat. In step one, the steel pipe pile is sent into the driven pile on the outside of the original road pavement base to the inside by the power mechanism, and then the steel pipe pile is sent into the driven pile to the predetermined depth by the power mechanism, and the driven pile is pulled out.

4. The method of claim 1, wherein In step three, the support steel reinforcement frame comprises a first frame body in the shape of a square tube on the outside and a second frame body in the shape of a "well" on the inside, each rod body of the first frame body extends downward to a plurality of third frame bodies, and each rod body of the second frame body extends upward to a plurality of fourth frame bodies.

5. The method of claim 1, wherein the method further comprises: In step four, the upper inside of the pressing plate is provided with pressing blocks, the pressing blocks are provided with threaded grooves penetrating in the horizontal direction, the internal threads of a pair of threaded grooves are opposite, the screw rod is symmetrically provided with reverse threads matched with the pair of threaded grooves, the pair of threaded grooves are connected through the screw rod, the screw rod rotates under the drive of the power mechanism to move the pair of pressing blocks to the inside of the pressing plate to press the original road pavement base, the power mechanism is removed, asphalt mastic chip mixture is poured on the inside of the pressing blocks, and cement concrete is poured on the outside of the pressing plate.

6. The method of claim 5, wherein the step of applying the tack coat is performed after the step of applying the base layer. In step four, a workbench is provided, the two ends of the screw rod are detachably hung on the workbench through the support, a bearing seat is provided at the center of the support, a fixed shaft is provided on the bearing seat, a Y-shaped connecting fork and a square-tube-shaped connecting frame are respectively rotatably sleeved on the fixed shaft, the connecting fork and the connecting frame are respectively rotatably connected with the top of a pair of pressing blocks through rotating shafts, the screw rod rotates to a pair of pressing blocks to a predetermined position under the drive of the power mechanism, the power mechanism is removed, and the workbench, the bearing seat, the support, the connecting fork and the connecting frame are removed.

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