Road rapid repair treatment structure and method

Abstract

The application provides a road rapid repairing and governing structure and method. The structure comprises a plurality of prefabricated concrete bearing platforms, prefabricated ground beams connecting two adjacent prefabricated concrete bearing platforms and prefabricated spiral piles installed on each prefabricated concrete bearing platform, a pile hole is formed in the middle of the prefabricated concrete bearing platform, and a ground beam connecting groove is arranged at the edge; a grouting channel is arranged in the prefabricated spiral pile, the pile tip of the prefabricated spiral pile is inserted into a bearing layer of a road foundation, and the pile tail is embedded in the pile hole in the middle of the prefabricated concrete bearing platform; and the two ends of the prefabricated ground beam are connected with the ground beam connecting grooves of the two adjacent prefabricated concrete bearing platforms through connecting parts. The prefabricated concrete components are adopted, the road can be rapidly repaired and governed, the construction is convenient, the road construction speed is improved, the prefabricated piles are inserted into the bearing layer, and the bearing capacity of the structure is increased through grouting.

Description

Technical Field

[0001] The present invention belongs to the field of rapid repair of soft soil foundations, damaged mountain road foundations, and specifically provides a rapid repair and management device and method for roads with soft soil foundation problems or damaged ordinary roads or damaged mountain roads. Background Art

[0002] In recent years, with the substantial improvement of my country's economic strength and a large amount of infrastructure investment in mountainous areas, mountain roads with general foundation conditions have been expanded to the standard for traffic. However, the foundations of some local sections of mountainous roads are soft soil foundations or the conditions on both sides of the roads are limited. When it rains too heavily, they are easily eroded by rising river water, the road surface is prone to water accumulation, the foundation is easily turned into soft soil foundation, or the road is washed away when the rain is too heavy. The existing treatment methods for the above problems are replacement method, drainage consolidation method, pressure grouting method, high-pressure jet solidification method, dynamic compaction method, etc. However, these methods take a long time to construct and are subject to limited construction conditions. They cannot immediately solve the problem of washed away roads or soft soil foundation roads, and cannot make the roads open to traffic in a short time. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a structure and method for quickly repairing damaged roads. This method uses prefabricated spiral piles and corresponding structures to improve the bearing capacity of the road surface, and can quickly repair damaged ordinary roads or mountain roads or roads with serious soft soil foundation problems, thereby realizing the rapid opening of roads to traffic.

[0004] In order to solve the above technical problems, the present invention provides a rapid repair and management structure for intermediate roads, the repair and management structure includes a plurality of precast concrete caps, a precast ground beam connecting two adjacent precast concrete caps and a precast screw pile installed on each precast concrete cap, the middle part of the precast concrete cap is provided with a pile hole and the edge is provided with a ground beam connecting groove; the precast screw pile includes a conical pile tip, a cylindrical pile body, a pile tail matching the pile hole and a spiral gear distributed along the outer wall of the cylindrical pile body, the precast screw pile A grouting channel is provided in the rotary pile, and the grouting port of the grouting channel is arranged at the end of the pile tail, and there are multiple grouting ports, which are dispersedly arranged on the cylindrical pile body, and each grouting port is facing upward; the conical pile tip of the precast spiral pile is inserted into the bearing layer of the road to be repaired or managed, and the pile tail is embedded in the pile hole in the middle of the precast concrete cap; the two ends of the precast ground beam are respectively provided with connecting parts that match the ground beam connecting groove, and the two ends of each precast ground beam are respectively connected to the ground beam connecting grooves of the two adjacent precast concrete caps through the connecting parts.

[0005] A further technical solution of the present invention: the repair and management structure also includes a prefabricated bottom beam wall, which is spliced ​​together by multiple prefabricated wall pieces. Each prefabricated wall piece is provided with mutually matching splicing notches on both sides, and a groove matching the prefabricated concrete pedestal is provided on the top. A slot matching the tail of the prefabricated spiral pile is provided at the position of the groove corresponding to the pile hole in the middle of the prefabricated concrete pedestal, and the length of the tail of the prefabricated spiral pile located at the prefabricated bottom beam wall is equal to or greater than the height of the prefabricated bottom beam wall and the thickness of the prefabricated concrete pedestal.

[0006] A further technical solution of the present invention is that the repair and treatment structure further comprises an expansive concrete wrapping layer formed outside the cylindrical pile body of the precast screw pile by pouring expansive concrete through a grouting channel.

[0007] The preferred technical solution of the present invention is as follows: the spiral gears distributed on the outer wall of the cylindrical pile body are downward spiral, the cylindrical pile bodies are all hollow concrete cylinders, the pile tails are hollow quadrilateral concrete structures, the grouting channels are welded by hollow steel pipes, including a vertical steel pipe in the middle and a plurality of branch steel pipes welded on both sides of the vertical steel pipe and connected to the vertical steel pipe, the vertical steel pipe extends to the end of the pile tail, and the plurality of branch steel pipes are distributed in the cylindrical pile body, and the pipe mouth of each branch steel pipe is facing upward, and An angle of less than 90 degrees is formed between the cylindrical pile body and the vertical steel pipe; the concrete column area of ​​the cylindrical pile body is formed by tying steel bars outside the hollow steel pipe and placing it in a mold to cast fiber concrete, the fiber cast concrete completely wraps the hollow steel pipe, and the pipe mouth of the branch steel pipe is located on the outer surface of the cylindrical pile body; the pile hole on the precast concrete base is a square hole that matches the cross-section of the pile tail; the diameters of the vertical steel pipe and the branch steel pipe are equal, and the width of the spiral gear is equal to the diameter of the hollow steel pipe.

[0008] The preferred technical solution of the present invention is as follows: the precast concrete cap is a square reinforced concrete cap cast from fiber concrete, with a pile hole matching the pile tail cross-section at its center; multiple precast concrete caps are distributed in a plum blossom shape, and each precast concrete cap has ground beam connection grooves at its four corners and the center of its four sides, and each ground beam connection groove is an inclined groove; two adjacent precast concrete caps in the same row are connected by a transverse precast ground beam, two adjacent precast concrete caps in the same column are connected by a vertical precast ground beam, and two adjacent precast concrete caps in different rows are connected by an oblique precast ground beam.

[0009] A better technical solution of the present invention: the prefabricated ground beam is a concrete connecting beam cast from fiber concrete with the top surface in the same plane. The prefabricated ground beam includes a ground beam middle part and ground beam side parts symmetrically located on both sides of the ground beam middle part. The thickness of the ground beam middle part is greater than the thickness of the ground beam side part. The bottom surface of the ground beam middle part is an inverted trapezoid, and a positioning groove matching the pile tail of the prefabricated spiral pile is provided on its bottom surface. The connecting part is an inclined groove opened on the bottom surface of the end of the ground beam edge part, and the inclined groove matches the ground beam connecting groove.

[0010] The preferred technical solution of the present invention is as follows: a plurality of precast concrete caps are arranged in a square, and the precast bottom beam wall is arranged under the outermost row or two rows of precast concrete caps; the precast bottom beam wall is cast from fiber concrete, the splicing notches are right-angled notches, and one end of each precast wall is an inwardly concave right-angled notch, and the other end is an outwardly convex right-angled notch, and the concave and convex of the two right-angled notches match each other; the middle of the slot hole in the groove area of ​​the precast bottom beam wall matches the cross-section of the pile tail, and the two ends are connected to the wall body at an obtuse angle.

[0011] In order to solve the above technical problems, the present invention also provides a method for rapid road repair and management, which uses the above-mentioned rapid road repair and management structure for processing, and its specific steps are as follows:

[0012] S1. First, weld the steel pipes to the shape of the grouting channel in the precast spiral pile, and ensure that the steel pipes are interconnected. Then, place the welded hollow steel pipes in the shell mold of the precast spiral pile and secure them, with or without steel reinforcement. Finally, pour fiber concrete to completely surround the hollow steel pipes and cure them for 26 to 30 days to achieve the designed strength to form the precast spiral pile.

[0013] S2. Cast the precast concrete cap and precast ground beams according to the design drawings. Each precast component is cast with fiber reinforced concrete and cured for 26 to 30 days to achieve the designed strength. The ground beam connection grooves on the precast concrete cap match the connection parts of the precast ground beams. The precast concrete cap has holes reserved for the tails of the precast screw piles.

[0014] S3. Prepare concrete slurry for standby use;

[0015] S4. Determine the number and location of precast spiral piles based on the road repair or management requirements. Use a drilling rig to drill each precast spiral pile into the bearing layer of the road foundation. High-pressure expansive concrete is poured through the grouting channels of the precast spiral piles until the expansive concrete envelops the piles. After pouring, wait for the concrete to set.

[0016] S5. Backfill the repaired roadbed area with gravel to the designed location and compact it;

[0017] S6. Place a precast concrete cap on top of each precast screw pile, with the pile hole of the precast concrete cap facing the tail of the precast screw pile;

[0018] S7. Place the bottom of the precast ground beam on the foundation and place both ends of the ground beam on the ground beam connection grooves of the two adjacent precast concrete caps;

[0019] S8. Place gravel in the gaps between the prefabricated ground beams and compact it. Finally, lay asphalt or concrete on the paved surface according to construction requirements to complete the road repair.

[0020] The preferred technical solution of the present invention is as follows: when repairing a mountain road, prefabricated bottom beam walls are installed on prefabricated spiral piles on both sides of the road. The prefabricated bottom beam walls are cast with fiber concrete, and the length of the pile tails of the prefabricated spiral piles at the installation of the prefabricated bottom beam walls is equal to or greater than the height of the prefabricated bottom beam walls and the thickness of the prefabricated concrete cap. The spiral pile tails of the prefabricated spiral piles are inserted into the holes and grooves in the wall bodies of the prefabricated bottom beam walls, and each prefabricated bottom beam wall is assembled with a mortise and tenon structure in sequence. After the assembly is completed, the prefabricated spiral piles of the prefabricated bottom beam walls are poured with expansive concrete. The expansive concrete is formed by mixing sand, gravel, and water in a ratio of 1:2:1 and adding 5% to 20% of an expansive agent.

[0021] A preferred technical solution of the present invention is as follows: in the step S2, the tip of the precast spiral pile is a 30-degree cone; when tying steel bars outside the hollow steel pipe, longitudinal steel bars and transverse steel bars are arranged around the steel pipe and overlapped to form a whole; the fiber concrete is prepared by mixing 20mm polypropylene fiber and concrete; in the step S7, before the precast ground beam is installed, for areas where the roadbed bearing capacity is insufficient, a precast spiral pile is driven between two precast spiral piles and expansive concrete is poured under high pressure; the tail of the newly driven precast spiral pile is directly connected to the positioning groove in the middle of the precast ground beam by mortise and tenon joint.

[0022] The present invention has the following beneficial effects:

[0023] (1) The repair structures in the present invention all use prefabricated concrete components, which can quickly repair and manage roads, facilitate construction, save construction time and funds, increase the speed of road construction, and open roads to traffic as soon as possible.

[0024] (2) The precast screw piles of the present invention are drilled into the bearing layer by a rotating machine, and the rotating gears are in close contact with the soil. Then, expansive concrete is poured into the precast screw piles under high pressure, which greatly increases the friction between the precast screw piles and the surrounding soil, making the stability of the entire structure better.

[0025] (3) The grouting outlet of the prefabricated spiral pile of the present invention is designed as a sharp-angle welded hollow steel pipe, which can effectively reduce the situation where the grouting outlet is blocked by the soil when the spiral pile is drilled into the foundation, thereby improving the grouting efficiency.

[0026] (4) The precast concrete cap in the present invention effectively improves the force connection between the precast ground beam and the precast spiral pile, and transmits the force to the pile and the bearing layer.

[0027] (5) The prefabricated ground beam structure of the present invention improves the bearing capacity of the ground beam. At the same time, when subjected to pressure, it generates an anchoring force to the foundation. When the pressure is too large, new prefabricated screw piles can be installed in the middle, greatly improving the bearing capacity of the ground beam.

[0028] (6) The structural design of the prefabricated bottom beam wall in the present invention improves the friction and interlocking ability of the two prefabricated bottom beam walls, and is anchored to the tail of the prefabricated spiral pile to form a whole; the horizontal height is maintained consistent, and the purpose is to facilitate the design of the end of the ground beam to be combined with the prefabricated concrete foundation.

[0029] (7) The combined design of the prefabricated bottom beam wall and the prefabricated spiral pile mortise and tenon structure of the present invention provides soil retaining for the road surface, facilitates backfilling of the roadbed, improves the bearing capacity of the road surface and saves construction time, and is also beneficial for preventing rainwater from penetrating or impacting the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic cross-sectional view of a road structure in the present invention;

[0031] Figure 2 It is a plan view schematic diagram of the present invention;

[0032] Figure 3 This is a schematic cross-sectional view of a prefabricated screw pile before pouring expansive concrete in the present invention;

[0033] Figure 4 This is a schematic cross-sectional view of the prefabricated screw pile after pouring expansive concrete in the present invention;

[0034] Figure 5 is a schematic cross-sectional view of the prefabricated ground beam of the present invention;

[0035] Figure 6 It is a plan view of the precast concrete cap in the present invention;

[0036] Figure 7 is a cross-sectional schematic diagram of the precast concrete cap in the present invention;

[0037] Figure 8 It is a structural schematic diagram of a single-piece prefabricated bottom beam wall in the present invention;

[0038] Figure 9 It is a top view of a single piece prefabricated bottom beam wall in the present invention;

[0039] Figure 10 It is a schematic diagram of the splicing of prefabricated bottom beam walls in the present invention.

[0040] In the figure: 1—precast screw pile, 100—conical pile tip, 101—cylindrical pile body, 102—pile tail, 103—spiral gear, 104—grouting channel, 2—precast concrete cap, 200—pile hole, 201—ground beam connection groove, 3—precast ground beam, 300—connecting part, 301—middle part of ground beam, 302—edge part of ground beam, 303—positioning groove, 4—bearing layer, 5—precast bottom beam wall, 500—splicing notch, 501—groove, 502—slot hole, 6—expanding concrete wrapping layer, 7—gravel. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figures 1 to 10 The accompanying drawings are simplified versions of the embodiments and are only used to clearly and concisely illustrate the embodiments of the present invention. The technical solutions shown in the accompanying drawings are specific solutions of the embodiments of the present invention and are not intended to limit the scope of the invention claimed for protection. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] A rapid road repair and management structure provided in the embodiment, such as Figure 1 As shown, the repair and treatment structure includes multiple precast concrete caps 2, precast ground beams 3 connecting two adjacent precast concrete caps 2, and precast screw piles 1 installed on each precast concrete cap 2; the precast concrete cap 2 has a pile hole 200 in the middle and a ground beam connection groove 201 on the edge. Figure 2 and Figure 3As shown, the prefabricated spiral pile 1 includes a tapered pile tip 100, a cylindrical pile body 101, a pile tail 102 matching the pile hole 200, and a downward spiral gear 103 distributed along the outer wall of the cylindrical pile body 101. The pile tip of the prefabricated spiral pile 1 is a 30-degree cone. A grouting channel 104 is provided in the prefabricated spiral pile 1. The grouting port of the grouting channel 104 is provided at the end of the pile tail 102, and a plurality of grouting ports are provided, which are dispersed on the cylindrical pile body 101, and each grouting port faces upward. The cylindrical pile body 101 is a hollow concrete cylinder, and the pile tail 102 is a hollow quadrilateral concrete structure. The grouting channel 104 is welded by hollow steel pipes, including a vertical steel pipe in the middle and a plurality of branch steel pipes welded on both sides of the vertical steel pipe and connected to the vertical steel pipe. The vertical steel pipe extends to the end of the pile tail 102. The plurality of branch steel pipes are distributed in the cylindrical pile body 101, and the pipe mouth of each branch steel pipe faces upward and forms an angle of less than 90 degrees with the vertical steel pipe. The concrete column area of ​​the cylindrical pile body 101 is formed by tying steel bars outside a hollow steel pipe and placing the steel bars in a mold, wherein the fiber-cast concrete completely wraps the hollow steel pipe, and the pipe opening of the branch steel pipe is located on the outer surface of the cylindrical pile body 101; the pile hole 200 on the precast concrete cap 2 is a square hole that matches the cross-section of the pile tail 102; the diameters of the vertical steel pipe and the branch steel pipe are equal, and the width of the helical gear 103 is equal to the diameter of the hollow steel pipe.

[0044] A rapid road repair and management structure provided in the embodiment, such as Figure 6 and Figure 7 As shown, the precast concrete cap 2 is a square reinforced concrete cap cast by fiber concrete, and a pile hole 200 matching the cross section of the pile tail 102 is opened at its center; Figure 2 As shown, multiple precast concrete caps 2 are distributed in a plum blossom shape. Each precast concrete cap 2 has a ground beam connection groove 201 at the four corners and the center of the four sides. Each ground beam connection groove 201 is an inclined groove. Two adjacent precast concrete caps 2 in the same row are connected by a horizontal precast ground beam, two adjacent precast concrete caps 2 in the same column are connected by a vertical precast ground beam, and two adjacent precast concrete caps 2 in different rows are connected by an oblique precast ground beam. Figure 5As shown, the prefabricated ground beam 3 is a concrete connecting beam cast from fiber concrete with the top surface in the same plane. The prefabricated ground beam 3 includes a ground beam middle portion 301 and ground beam side portions 302 symmetrically located on both sides of the ground beam middle portion 301. The thickness of the ground beam middle portion 301 is greater than that of the ground beam side portions 302. The bottom surface of the ground beam middle portion 302 is an inverted trapezoid, and a positioning groove 303 is provided on its bottom surface to match the pile tail 102 of the prefabricated screw pile 1. The connecting portion 300 is an inclined groove provided on the bottom surface of the end of the ground beam side portion 302, and the inclined groove matches the ground beam connecting groove 201.

[0045] A rapid road repair and management structure provided in the embodiment, such as Figure 1 As shown, the conical pile tip 100 of the precast screw pile 1 is inserted into the bearing layer 4 of the road to be repaired or renovated, and the pile foot 102 is embedded in the pile hole 200 in the middle of the precast concrete cap 2. The precast ground beam 3 is provided with connecting portions 300 at both ends that match the ground beam connecting grooves 201. The two ends of each precast ground beam 3 are respectively connected to the ground beam connecting grooves 201 of two adjacent precast concrete caps 2 through the connecting portions 300. The repair and renovation structure also includes an expansive concrete enveloping layer 6 formed by pouring expansive concrete through the grouting channel 104 around the cylindrical pile body 101 of the precast screw pile 1. The area enclosed by the precast ground beam 3 is filled with crushed stone 7.

[0046] The embodiment provides a kind of road rapid repair and management structure, when repairing mountain roads, also includes a prefabricated bottom beam wall 5, such as Figures 8 to 10 As shown, the prefabricated bottom beam wall 5 is formed by splicing together multiple pieces of prefabricated wall bodies. Each prefabricated wall body is provided with mutually matching splicing notches 500 on both sides, and a groove 501 matching the prefabricated concrete pedestal 2 is provided on the top. A slot matching the tail of the prefabricated spiral pile 1 is provided at the position of the groove 501 corresponding to the pile hole 200 in the middle of the prefabricated concrete pedestal, and the length of the tail of the prefabricated spiral pile located at the prefabricated bottom beam wall 5 is equal to or greater than the height of the prefabricated bottom beam wall 5 and the thickness of the prefabricated concrete pedestal 2. When the length of the tail of the prefabricated spiral pile is equal to the height of the prefabricated bottom beam wall 5 and the thickness of the prefabricated concrete pedestal 2, the conditions are just met and the assembly type is not affected; when the length is greater than, the excess part can be used as a curbstone. Figure 1 and Figure 2 As shown, multiple precast concrete caps 2 are arranged in a square, and the precast bottom beam wall 5 is arranged below the two outermost rows of precast concrete caps 2; the precast bottom beam wall 5 is cast from fiber concrete, the splicing notch 500 is a right-angle notch, and one end of each precast wall is an inwardly concave right-angle notch, and the other end is an outwardly convex right-angle notch, and the concave and convex of the two right-angle notches match each other; the middle of the slot hole in the groove area of ​​the precast bottom beam wall 5 matches the cross-section of the pile tail 102, and the two ends are connected to the wall body at an obtuse angle.

[0047] The fiber concrete in the following embodiments is prepared by mixing 20mm polypropylene fiber and concrete. The precast spiral pile 1 in the embodiment is welded by welding steel pipes according to the shape of the grouting channel in the precast spiral pile, and each steel pipe is interconnected; then the welded hollow steel pipe is placed in the shell mold of the precast spiral pile and fixed, and longitudinal steel bars and transverse steel bars are arranged around the steel pipe according to the design bearing capacity requirements and tied and overlapped to form a whole. Finally, fiber concrete is poured to completely wrap the hollow steel pipe, and standard curing is carried out for 28 days to achieve the design strength; the precast concrete pedestal 2, precast ground beam 3 and precast bottom beam wall 5 in the embodiment are all cast according to the design drawings, and each precast component is cast with fiber concrete and standard curing is carried out for 28 days to achieve the design strength; the ground beam connection groove 201 on the precast concrete pedestal 2 matches the connection part of the cast precast ground beam 3, and a pile hole matching the pile tail of the precast spiral pile 1 is reserved on the precast concrete pedestal 2.

[0048] The expansive concrete in the following examples is a concrete formed by mixing sand, gravel, and water in a ratio of 1:2:1 and adding 5% of an expansive agent.

[0049] Implementation Case 1: Repair and treatment of common damaged roads and roads with soft soil foundation problems. The specific construction steps are as follows:

[0050] S1. Prepare materials: Prefabricated screw piles (1), prefabricated concrete caps (2), prefabricated ground beams (3), expansive concrete, and crushed stone according to the design drawings. The number and spacing of the prefabricated screw piles (1) will be designed based on the specific road conditions.

[0051] S2. Determine the number of precast spiral piles according to the requirements of road repair or management, and determine the location of the precast spiral piles. Use a drilling rig to drill each precast spiral pile 1 into the bearing layer 4 of the road foundation, and pour expansive concrete through the grouting channel of the precast spiral pile 1 under high pressure until the expansive concrete wraps the pile body of the precast spiral pile 1. After pouring, wait for the initial setting of the concrete to end;

[0052] S3. Backfill the repaired roadbed area with gravel to the designed location and compact it;

[0053] S4. Place a precast concrete cap 2 on top of each precast screw pile 1, the pile hole of the precast concrete cap 2 is opposite the tail of the precast screw pile 1;

[0054] S5. The bottom of the precast ground beam 10 is placed on the foundation and the ends of the ground beam are placed on two adjacent precast concrete caps 2 of the ground beam connection groove 201;

[0055] S6. Lay gravel 7 in the gaps between the prefabricated ground beams 3 and compact it. Finally, lay asphalt or concrete on the paved ground according to construction requirements to complete the road repair.

[0056] Implementation Case 2 focuses on the repair and treatment of severely damaged roads and roads with severe soft soil foundation problems (to improve the bearing capacity of prefabricated ground beams). The specific steps are as follows:

[0057] S1. Prepare materials: Prefabricated screw piles (1), prefabricated concrete caps (2), prefabricated ground beams (3), expansive concrete, and crushed stone according to the design drawings.

[0058] S2. Determine the number of precast spiral piles according to the requirements of road repair or management, and determine the location of the precast spiral piles. Use a drilling rig to drill each precast spiral pile 1 into the bearing layer 4 of the road foundation, and pour expansive concrete through the grouting channel of the precast spiral pile 1 under high pressure until the expansive concrete wraps the pile body of the precast spiral pile 1. After pouring, wait for the initial setting of the concrete to end;

[0059] S3. Backfill the repaired roadbed area with gravel to the designed location and compact it;

[0060] S4. Place a precast concrete cap 2 on top of each precast screw pile 1, the pile hole of the precast concrete cap 2 is opposite the tail of the precast screw pile 1;

[0061] S5: For the part where the bearing capacity of the roadbed is insufficient, according to the design requirements, another precast screw pile 1 is driven between two precast screw piles 1 and expansive concrete is poured under high pressure. Then, the tail of the precast screw pile 1 and the concave part in the middle of the precast ground beam 3 are installed with a mortise and tenon structure;

[0062] S6. The bottom of the precast beam 3 is placed on the foundation and the ends of the beam are placed on the two adjacent precast concrete caps 2 of the beam connection groove 201;

[0063] S7. Lay gravel 7 in the gaps between the prefabricated ground beams 3 and compact it. Finally, lay asphalt or concrete on the paved ground according to construction requirements to complete the road repair.

[0064] Implementation Case 3: Construction methods for repairing rain-damaged roads in the mountains and preventing rainwater from eroding the roadbed. The specific steps are as follows:

[0065] S1. Prepare materials: Prefabricated screw piles (1), prefabricated concrete caps (2), prefabricated ground beams (3), prefabricated sill walls (5), expansive concrete, and crushed stone according to the design drawings.

[0066] S2. Determine the number of precast spiral piles according to the requirements of road repair or management, and determine the location of the precast spiral piles. Use a drilling rig to drill each precast spiral pile 1 into the bearing layer 4 of the road foundation, and pour expansive concrete through the grouting channel of the precast spiral pile 1 under high pressure until the expansive concrete wraps the pile body of the precast spiral pile 1. After pouring, wait for the initial setting of the concrete to end;

[0067] S3: According to the design, prefabricated bottom beam walls 5 are installed on the prefabricated screw piles 1 on both sides of the road. The screw pile tails 102 of the prefabricated screw piles 1 are passed through the hollow part of the bottom beam wall. The mortise and tenon structure of the gear part on the side of each prefabricated bottom beam wall 5 is installed in sequence. After the installation is completed, the gap between the prefabricated bottom beam wall 5 and the screw pile tails of the prefabricated screw piles 1 is poured with expansive concrete.

[0068] S4. Backfill the repaired roadbed area with gravel to the designed location and compact it;

[0069] S5. Place a precast concrete cap 2 on top of each precast screw pile 1, the pile hole of the precast concrete cap 2 is opposite the tail of the precast screw pile 1;

[0070] S6: For the part where the bearing capacity of the roadbed is insufficient, according to the design requirements, another precast screw pile 1 is driven between two precast screw piles 1 and expansive concrete is poured under high pressure. Then, the tail of the precast screw pile 1 and the concave part in the middle of the precast ground beam 3 are installed with a mortise and tenon structure;

[0071] S7. The bottom of the precast beam 3 is placed on the foundation and the ends of the beam are placed on two adjacent precast concrete caps 2 of the beam connection groove 201;

[0072] S8. Lay gravel 7 in the gaps between the prefabricated ground beams 3 and compact it. Finally, lay asphalt or concrete on the paved ground according to construction requirements to complete the road repair.

[0073] The above descriptions are merely a few embodiments of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A road rapid repair and management structure, characterized by: The repair and treatment structure comprises a plurality of precast concrete caps (2), a precast ground beam (3) connecting two adjacent precast concrete caps (2), and a precast screw pile (1) installed on each precast concrete cap (2), wherein a pile hole (200) is opened in the middle of the precast concrete cap (2) and a ground beam connection groove (201) is provided on the edge; the precast screw pile (1) comprises a conical pile tip (100), a cylindrical pile body (101), a pile tail (102) matching the pile hole (200), and a spiral gear (103) distributed along the outer wall of the cylindrical pile body (101); a grouting channel (104) is provided in the precast screw pile (1), and the grouting channel The slurry inlet of the road (104) is arranged at the end of the pile tail (102), and a plurality of slurry outlets are provided, which are dispersedly arranged on the cylindrical pile body (101), and each slurry outlet faces upward; the conical pile tip (100) of the prefabricated spiral pile (1) is inserted into the bearing layer (4) of the road to be repaired and managed, and the pile tail (102) is embedded in the pile hole (200) in the middle of the prefabricated concrete cap (2); the two ends of the prefabricated ground beam (3) are respectively provided with connecting parts (300) matching the ground beam connecting groove (201), and the two ends of each prefabricated ground beam (3) are respectively matched and connected with the ground beam connecting grooves (201) of the two adjacent prefabricated concrete caps (2) through the connecting parts (300); The repair and treatment structure further comprises a prefabricated bottom beam wall (5), wherein the prefabricated bottom beam wall (5) is formed by splicing a plurality of prefabricated wall pieces, and each prefabricated wall piece is provided with mutually matching splicing notches (500) on both sides, and a groove (501) matching the prefabricated concrete pedestal (2) is provided on the top, and a groove (502) matching the tail of the prefabricated spiral pile (1) is provided at a position of the groove (501) corresponding to the pile hole (200) in the middle of the prefabricated concrete pedestal, and the length of the tail of the prefabricated spiral pile located at the prefabricated bottom beam wall (5) is equal to or greater than the height of the prefabricated bottom beam wall (5) and the thickness of the prefabricated concrete pedestal (2); The spiral gears (103) distributed on the outer wall of the cylindrical pile body (101) are downward spiral-shaped. The cylindrical pile body (101) is a hollow concrete column. The pile tail (102) is a hollow quadrilateral concrete structure. The grouting channel (104) is welded by hollow steel pipes, including a vertical steel pipe in the middle and a plurality of branch steel pipes welded on both sides of the vertical steel pipe and connected to the vertical steel pipe. The vertical steel pipe extends to the end of the pile tail (102). The plurality of branch steel pipes are distributed in the cylindrical pile body (101). The pipe mouth of each branch steel pipe faces upward and is connected to the vertical steel pipe. The vertical steel pipes form an angle of less than 90 degrees; the concrete column area of ​​the cylindrical pile body (101) is formed by tying steel bars outside the hollow steel pipe and then placing it in a mold and pouring fiber concrete, the fiber concrete completely wraps the hollow steel pipe, and the pipe opening of the branch steel pipe is located on the outer surface of the cylindrical pile body (101); the pile hole (200) on the precast concrete cap (2) is a square hole that matches the cross-section of the pile tail (102); the diameters of the vertical steel pipe and the branch steel pipe are equal, and the width of the spiral gear (103) is equal to the diameter of the hollow steel pipe.

2. A road rapid repair and management structure according to claim 1, characterized in that: The repair and treatment structure further comprises an expansive concrete wrapping layer (6) formed outside the cylindrical pile body (101) of the precast screw pile (1) by pouring expansive concrete through a grouting channel (104).

3. The road rapid repair and management structure according to claim 1 is characterized by: The precast concrete cap (2) is a square reinforced concrete cap cast by fiber concrete, and a pile hole (200) matching the cross section of the pile tail (102) is opened at the center of the precast concrete cap (2); a plurality of precast concrete caps (2) are distributed in a plum blossom shape, and each precast concrete cap (2) is provided with a ground beam connection groove (201) at the four corners and the center of the four sides, and each ground beam connection groove (201) is an inclined groove; two adjacent precast concrete caps (2) in the same row are connected by a transverse precast ground beam, two adjacent precast concrete caps (2) in the same column are connected by a vertical precast ground beam, and two adjacent precast concrete caps (2) in different rows are connected by an inclined precast ground beam.

4. A road rapid repair and management structure according to claim 1, characterized in that: The prefabricated ground beam (3) is a concrete connecting beam cast from fiber concrete, the top surfaces of which are in the same plane. The prefabricated ground beam (3) comprises a ground beam middle portion (301) and ground beam side portions (302) symmetrically located on both sides of the ground beam middle portion (301). The thickness of the ground beam middle portion (301) is greater than that of the ground beam side portions (302). The bottom surface of the ground beam middle portion (301) is in an inverted trapezoidal shape, and a positioning groove (303) matching the pile tail (102) of the prefabricated screw pile (1) is provided on the bottom surface. The connecting portion (300) is an inclined groove provided on the bottom surface of the end of the ground beam side portion (302), and the inclined groove matches the ground beam connecting groove (201).

5. The road rapid repair and management structure according to claim 1 is characterized by: A plurality of precast concrete caps (2) are arranged in a square, and the precast bottom beam wall (5) is arranged below one or two outermost rows of precast concrete caps (2); the precast bottom beam wall (5) is cast from fiber concrete, the splicing notch (500) is a right-angle notch, and one end of each precast wall is an inwardly concave right-angle notch, and the other end is an outwardly convex right-angle notch, and the concave and convex of the two right-angle notches match each other; the middle of the slot hole in the groove area of ​​the precast bottom beam wall (5) matches the cross section of the pile tail (102), and the two ends are connected to the wall body at an obtuse angle.

6. A method for rapid road repair and management, characterized by: The method is carried out using the road rapid repair and management structure according to any one of claims 1 to 5, and the specific steps are as follows: S1. First, weld the steel pipes according to the shape of the grouting channel in the prefabricated spiral pile (1), and connect the steel pipes to each other; then place the welded hollow steel pipes in the shell mold of the prefabricated spiral pile, fix them, tie the steel bars, and finally pour fiber concrete to completely wrap the hollow steel pipes. Standard curing is carried out for 26 to 30 days to achieve the designed strength to form the prefabricated spiral pile (1); S2. Cast the precast concrete cap (2) and the precast ground beam (3) according to the design drawings. Each precast component is cast with fiber concrete and cured for 26 to 30 days to reach the design strength. The ground beam connection groove (201) on the precast concrete cap (2) matches the connection part of the cast precast ground beam (3). A pile hole matching the pile tail of the precast screw pile (1) is reserved on the precast concrete cap (2). S3. Prepare concrete slurry for standby use; S4. Determine the number of precast spiral piles according to the requirements of road repair and management, and determine the location of the precast spiral piles. Use a drilling rig to drill each precast spiral pile (1) into the bearing layer (4) of the road foundation, and pour expansive concrete through the grouting channel of the precast spiral pile (1) under high pressure until the expansive concrete wraps the pile body of the precast spiral pile (1). After pouring, wait for the initial setting of the concrete to end. S5. Backfill the repaired roadbed area with gravel to the designed location and compact it; S6. A precast concrete cap (2) is placed on the top of each precast screw pile (1), the pile hole of the precast concrete cap (2) being opposite to the pile tail of the precast screw pile (1); S7. The bottom of the precast ground beam (3) is placed on the foundation and the ends of the ground beam are placed on the ground beam connection grooves (201) of the two adjacent precast concrete caps (2); S8. Spread crushed stone (7) in the gaps between the prefabricated ground beams (3) and compact it. Finally, spread asphalt or concrete on the paved ground according to the construction requirements to complete the road repair.

7. A method for rapid road repair and management according to claim 6, characterized in that: When repairing a mountain road, prefabricated bottom beam walls (5) are installed on prefabricated spiral piles (1) on both sides of the road. The prefabricated bottom beam walls (5) are cast using fiber concrete, and the length of the pile tail of the prefabricated spiral pile (1) at the location where the prefabricated bottom beam walls (5) are installed is equal to or greater than the height of the prefabricated bottom beam walls (5) and the thickness of the prefabricated concrete cap (2); the spiral pile tail of the prefabricated spiral pile (1) is passed through the hole groove of the wall body of the prefabricated bottom beam wall (5), and each prefabricated bottom beam wall (5) is assembled with a mortise and tenon structure in sequence. After the assembly is completed, the prefabricated spiral piles of the prefabricated bottom beam wall (5) are poured with expansive concrete; the expansive concrete is formed by mixing sand, gravel, and water in a ratio of 1:2:1 and adding 5%-20% of an expansive agent.

8. A method for rapid road repair and management according to claim 6 or 7, characterized in that: In the step S2, the pile tip of the prefabricated spiral pile (1) is in a 30-degree cone shape. When tying steel bars outside the hollow steel pipe, longitudinal steel bars and transverse steel bars are arranged around the steel pipe and overlapped to form a whole. The fiber concrete is prepared by mixing 20mm polypropylene fibers and concrete. In the step S7, before the installation of the prefabricated ground beam (3), for the part where the roadbed bearing capacity is insufficient, a prefabricated spiral pile (1) is driven in between two prefabricated spiral piles (1) and expansive concrete is poured under high pressure. The pile tail of the newly driven prefabricated spiral pile (1) is directly connected to the positioning groove (303) in the middle of the prefabricated ground beam (3) by mortise and tenon joint.

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