Methods for strengthening the foundation of highways in freeze-thaw zones

Abstract

This invention discloses a method for reinforcing the foundation of a highway in a freeze-thaw zone, including drainage of the foundation. The drainage step is achieved through a drainage assembly, which includes: a pair of longitudinal drainage channels located below the two shoulders of the pavement layer; an upper water collection plate located below the pavement layer; a lower water collection plate located below the upper water collection plate; and a pair of transverse drainage channels located below the longitudinal ends of the lower water collection plate. This invention can quickly drain accumulated water from the shoulder side of the pavement layer and rapidly drain water that has seeped into the pavement layer from top to bottom, reducing rainwater erosion of the highway foundation and demonstrating strong adaptability and improvement to the multi-year freeze-thaw cycle in the freeze-thaw zone of the eastern highway.

Description

Technical Field

[0001] This invention relates to the field of highway construction technology. More specifically, this invention relates to a method for reinforcing the foundation of highways in freeze-thaw zones. Background Technology

[0002] With the rapid development of my country's economy, the demand for efficient logistics and transportation is increasing, and the requirements and standards for highway construction are gradually rising. However, foundation treatment in freeze-thaw regions remains a global challenge. Moisture is a prerequisite for permeability damage in pavement layers, and the presence of pores connecting asphalt mixtures to the outside environment provides an effective pathway for moisture to penetrate the material. The freezing and thawing cycles of water in the foundation cause cyclical expansion and contraction of the foundation in freeze-thaw zones, leading to damage to the pavement layer and, in severe cases, cracking. Summary of the Invention

[0003] This invention provides a method for reinforcing the foundation of highways in freeze-thaw zones. It can quickly drain water from the road surface layer from the shoulder side and rapidly drain water that has seeped into the lower part of the road surface layer from top to bottom, reducing the erosion of the highway foundation by rainwater. It has strong adaptability and improvement to the multi-year freeze-thaw cycle in the freeze-thaw zone of the eastern expressway.

[0004] To achieve these objectives and other advantages according to the present invention, a method for reinforcing the foundation of a highway in a freeze-thaw zone is provided, comprising draining the pavement layer, wherein the drainage step is achieved by a drainage assembly comprising:

[0005] A pair of longitudinal drainage channels are located below the two shoulders of the pavement layer;

[0006] The upper water collection plate is located below the road surface layer. The upper water collection plate includes water collection hoppers distributed in multiple rows and columns. Each water collection hopper includes a frustum-shaped water collection part that is larger at the top and smaller at the bottom, and a cylindrical drainage part of uniform size.

[0007] The lower water collection plate is located below the upper water collection plate. The lower water collection plate includes multiple rows of U-shaped water collection troughs arranged in sequence. The water collection troughs are arranged parallel to the longitudinal drainage troughs, and one water collection trough is located directly below the drainage part of a row of water collection hoppers.

[0008] A pair of transverse drainage channels are provided below the longitudinal ends of the lower water collection plate. The transverse drainage channels are perpendicular to the longitudinal drainage channels, and the pair of transverse drainage channels respectively receive the longitudinal ends of the lower water collection plate.

[0009] The main drainage pipe is connected to a pair of longitudinal drainage channels and a pair of transverse drainage channels via branch pipes.

[0010] Preferably, a filter screen is provided above both the longitudinal drainage channel and the upper water collection plate.

[0011] Preferably, the bottom of the upper water collection plate and the top of the lower water collection plate are connected by a protective plate.

[0012] Preferably, the method includes clamping the two sides of the foundation together, the clamping step being achieved by a clamping assembly, the clamping assembly further comprising:

[0013] The clamping structure includes a pair of clamping plates and a clamping sleeve. The pair of clamping plates are symmetrically arranged on both sides of the foundation. The clamping plates are horizontally fixed to a clamping shaft through a horizontal plate. The horizontal plate has a counterweight inside. The clamping shaft has an external thread, and the external threads of the pair of clamping shafts have opposite directions of rotation. The clamping sleeve is horizontally arranged below the foundation. The clamping sleeve has an external thread and two sections of internal threads with opposite directions of rotation. The external threads of the pair of clamping shafts are simultaneously threadedly connected to the two sections of internal threads of the clamping sleeve. Rotating the clamping sleeve causes the pair of clamping plates to move closer together and move towards each other.

[0014] A traction structure includes a pair of traction plates, a pair of traction springs, and a pair of buffer springs. The outer sides of a pair of clamping plates are connected to the inner sides of a pair of traction plates via a pair of buffer springs. The buffer springs include an upper buffer spring and a lower buffer spring. The bottom of a pair of clamping plates is connected to a horizontal plate via a hinge seat. A pair of longitudinal drainage channels have traction blocks at their bottoms. The traction blocks have inclined traction surfaces. The inner sides of a pair of clamping plates are connected to a pair of traction springs. The traction springs are inclined and connected to the inclined traction surfaces.

[0015] Preferably, the outer sides of the pair of top clamping plates are provided with angle steel reinforcing plates, which are connected to the foundation by high-strength bolts.

[0016] Preferably, the traction spring is connected to an extension plate, and the inner sides of a pair of clamping plates are connected to the extension plate via hinge seats.

[0017] The present invention has at least the following beneficial effects:

[0018] First, this invention, from the perspective of foundation drainage control, sets up a pair of longitudinal drainage channels to quickly drain the accumulated water in the road surface layer from the shoulder side, and sets up an upper water collection plate, a lower water collection plate, and a pair of transverse drainage channels to quickly drain the accumulated water that has seeped into the road surface layer from top to bottom, thereby avoiding the accumulation of a large amount of rainwater, reducing the erosion of the highway foundation by rainwater, and having strong adaptability and improvement to the multi-year freeze-thaw cycle in the freeze-thaw zone of the eastern expressway.

[0019] Secondly, this invention tightens the two sides of the foundation. When the road surface vibrates downwards, the traction spring and the buffer spring work together to reduce or even eliminate the vibration transmitted to the tightening plate. A pair of tightening plates clamp the internal structure to prevent deformation and further strengthen the roadbed.

[0020] 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

[0021] Figure 1 This is a schematic diagram of the structure of one technical solution of the present invention. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 1 As shown, this invention provides a method for reinforcing the foundation of a highway in a freeze-thaw zone. The foundation in the freeze-thaw zone of the highway has an existing layered structure, which may include, but is not limited to, rock-soil layers, gravel-soil layers, silt-soil layers, and compacted soil layers. The reinforcement method includes draining the pavement layer 4. The drainage step is achieved through a drainage assembly, which includes:

[0026] A pair of longitudinal drainage channels 1 are located below the two shoulders of the pavement layer 4;

[0027] The upper water collection plate 2 is disposed below the road surface layer 4. The upper water collection plate 2 includes water collection hoppers distributed in multiple rows and columns. The water collection hoppers include a frustum-shaped water collection part that is larger at the top and smaller at the bottom and a cylindrical drainage part of uniform size.

[0028] The lower water collection plate 3 is located below the upper water collection plate 2. The lower water collection plate 3 includes multiple rows of U-shaped cross-section water collection troughs arranged in sequence. The water collection troughs are arranged parallel to the longitudinal drainage trough 1, and one water collection trough is located directly below the drainage part of a row of water collection hoppers.

[0029] A pair of transverse drainage channels 12 are disposed below the longitudinal ends of the lower water collection plate 3. The transverse drainage channels 12 are perpendicular to the longitudinal drainage channels 1, and the pair of transverse drainage channels 12 respectively receive the longitudinal ends of the lower water collection plate 3.

[0030] The main drainage pipe is connected to a pair of longitudinal drainage channels 1 and a pair of transverse drainage channels 12 via branch pipes.

[0031] In the above technical solution, in order to maintain the stability of the foundation 5 in the freeze-thaw zone of the expressway over many years, from the perspective of drainage control of the foundation 5, a pair of longitudinal drainage channels 1 are set up to quickly drain the water accumulated in the pavement layer 4 from the shoulder side. The upper water collection plate 2, the lower water collection plate 3, and a pair of transverse drainage channels 12 are set up to quickly drain the water that has seeped into the pavement layer 4 from top to bottom, thereby avoiding the accumulation of a large amount of rainwater, reducing the erosion of the expressway foundation 5 by rainwater, and having strong adaptability and improvement to the freeze-thaw cycle of the eastern expressway.

[0032] A pair of longitudinal drainage channels 1 are existing U-shaped channels, with their tops connecting to the pavement layer 4. They have the capacity to quickly guide water accumulated in the pavement layer 4. Upper water collection plates 2 and lower water collection plates 3 are positioned one above the other below the pair of longitudinal drainage channels 1. The upper water collection plate 2 can be assembled by splicing and welding multiple water collection buckets into a surface, covering the entire pavement without leaving any dead corners. The shape of the water collection section facilitates the rapid collection of water accumulated above into the drainage section, while the shape of the drainage section allows rainwater in the drainage buckets to seep out quickly, preventing damage to the highway foundation 5 from prolonged immersion in water. The lower water collection plate 3 can be assembled by splicing and welding multiple U-shaped channels into a surface, collecting the water flowing from the upper drainage section into a stream that flows longitudinally to both ends. Point-to-line drainage: A pair of transverse drainage channels 12 can be set as U-shaped channels, which have the capacity to quickly guide and collect accumulated water. Geotextiles, waterproof membranes, etc. can also be set below the pair of transverse drainage channels 12 to prevent water from continuing to migrate and accumulate downwards, which greatly inhibits the occurrence of frost heave and can block the rise of moisture. This helps to keep the foundation 5 at a low moisture content level and reduces the damage caused by periodic freeze-thaw cycles to the foundation 5 and the pavement layer 4. A pair of longitudinal drainage channels 1 and a pair of transverse drainage channels 12 collect and discharge the surface water on the road and the water that has seeped down below, which facilitates drainage, water storage, and the use of wastewater for irrigation. It has a highly efficient drainage effect and reduces the damage of freeze-thaw phenomena to the road.

[0033] In another technical solution, a filter screen 13 is provided above both the longitudinal drainage channel 1 and the upper water collection plate 2. The filter screen 13 intercepts large debris and gravel from entering the water collection part of the longitudinal drainage channel 1 and the upper water collection plate 2, thereby avoiding blockage caused by debris accumulation, improving drainage efficiency, and ensuring smooth drainage flow.

[0034] In another technical solution, the bottom of the upper water collection plate 2 and the top of the lower water collection plate 3 are connected by a protective plate. Connecting the upper water collection plate 2 and the lower water collection plate 3 into a sealed structure prevents water from seeping back into the surrounding space, reduces the relative humidity of the surrounding soil, and thus minimizes the impact of freeze-thaw cycles.

[0035] Because vehicles generate vibrations during operation, these vibrations are transmitted through the road surface layer 4 to the underlying foundation 5. Prolonged or frequent vibrations can cause wear on the foundation 5. Combined with the high static load of the road surface layer 4, this can lead to cracking between the road surface layer 4 and the foundation 5. In another technical solution, the foundation 5 is tightened on both sides using a tightening assembly, which further includes:

[0036] The clamping structure includes a pair of clamping plates 6 and a clamping sleeve 8. The pair of clamping plates 6 are symmetrically arranged on both sides of the foundation 5. The clamping plates 6 are horizontally fixedly connected to a clamping shaft 7 through a horizontal plate 15. The horizontal plate 15 is provided with a counterweight. The clamping shaft 7 is provided with an external thread, and the external threads of the pair of clamping shafts 7 have opposite directions of rotation. The clamping sleeve 8 is horizontally arranged below the foundation 5. The clamping sleeve 8 has an external thread and two sections of internal threads with opposite directions of rotation. The external threads of the pair of clamping shafts 7 are simultaneously threadedly connected to the two sections of internal threads of the clamping sleeve 8. Rotating the clamping sleeve 8 causes the pair of clamping plates 6 to move closer together and move towards each other.

[0037] The traction structure includes a pair of traction plates 9, a pair of traction springs 10, and a pair of buffer springs 11. The outer sides of a pair of top plates 6 are connected to the inner sides of a pair of traction plates 9 via a pair of buffer springs 11. The buffer springs 11 include an upper buffer spring 11 and a lower buffer spring 11. The bottom of the pair of top plates 6 is connected to the horizontal plate 15 via a hinge seat. Traction blocks 14 are provided at the bottom of both sides of the road surface layer 4. The traction blocks 14 have inclined traction surfaces. The inner sides of the pair of top plates 6 are connected to a pair of traction springs 10. The traction springs 10 are inclined and connected to the inclined traction surfaces.

[0038] In the above technical solution, the foundation 5 is tightened. When the road surface layer 4 vibrates downward, the traction spring 10 and the buffer spring 11 work together to reduce or even eliminate the vibration transmitted to the tightening plate 6. A pair of tightening plates 6 clamp the internal structure to prevent deformation and further strengthen the roadbed.

[0039] A pair of hinged seats are installed on a pair of horizontal plates 15, and then a pair of top clamping plates 6 are installed. The pair of top clamping plates 6 can swing relative to the horizontal plates 15. A pair of buffer springs 11 are installed on the pair of top clamping plates 6. The buffer springs 11 include an upper buffer spring 11 and a lower buffer spring 11, which are connected to the upper and lower parts of the top clamping plates 6 respectively. When the top clamping plates 6 swing, the buffer springs 11 will contract and adjust accordingly when subjected to external force. The upper buffer spring 11 and the lower buffer spring 11 extend to different lengths to match the swing amplitude of the top clamping plates 6, thereby buffering the force and reducing the force exerted by the pair of top clamping plates 6 on the pair of traction plates 9, thereby improving the stability of the connection between the pair of top clamping plates 6 and the foundation 5, and indirectly improving the reinforcement effect of the foundation 5. A traction block 14 is installed at the bottom of a pair of longitudinal drainage channels 1. The traction block 14 is a wedge-shaped block, and its inclined traction surface is connected to the traction spring 10. When the road surface is subjected to downward pressure, the pressure is transmitted to the traction spring 10. It can absorb the vibration generated by the vehicle driving above the road surface layer 4 and prevent wear inside the foundation 5. When the road surface layer 4 sinks slightly, the traction block 14 can provide a supporting force through the traction spring 10 to prevent the road surface layer 4 from sinking. At the same time, the traction block 14 can also be used for shoulder drainage operation. The traction spring 10 drives the top plate 6 to swing. A pair of top plates 6 and a pair of horizontal plates 15 form an external wrapping protection structure to further prevent deformation and reduce the impact of the vibration of the road surface layer 4 on the foundation 5.

[0040] It can effectively provide temporary support for the vibration (dynamic load) on the top of the pavement layer 4, ensuring that it will not be damaged when subjected to vibration (dynamic load), effectively improving the compressive strength. Furthermore, it can change its bottom support effect according to the actual load, greatly improving the load-bearing capacity. It can not only provide support in a steady state, but also change the support effect and reinforcement force in a dynamic state, ensuring stability and reinforcement effect in a dynamic state.

[0041] In another technical solution, angle steel reinforcing plates are provided on the outer sides of a pair of top clamping plates 6, which are connected to the foundation 5 by high-strength bolts. These plates are embedded and fixed to the soil layer. The number of angle steel reinforcing plates can be set according to the horizontal length of the top clamping plates 6, further strengthening the vertical stability of the top clamping plates 6 and increasing the strength of the connection structure between the foundation 5 and the soil layer, thereby achieving the reinforcement of the foundation 5.

[0042] In another technical solution, the traction spring 10 is connected to an extension plate, and the inner sides of a pair of clamping plates 6 are connected to the extension plate via hinge seats. The extension plate and the traction spring 10 are arranged coaxially. When the traction spring 10 is compressed, it presses against the extension plate, and the extension plate adjusts its swing angle to more effectively transmit external force to the clamping plates 6, thus protecting the service life of the traction spring 10.

[0043] 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.

[0044] 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 for reinforcing the foundation of highways in freeze-thaw zones, characterized in that, include: 1) Draining the pavement layer, the drainage step being achieved through a drainage assembly, the drainage assembly comprising: A pair of longitudinal drainage channels are located below the two shoulders of the pavement layer; The upper water collection plate is located below the road surface layer. The upper water collection plate includes water collection hoppers distributed in multiple rows and columns. Each water collection hopper includes a frustum-shaped water collection part that is larger at the top and smaller at the bottom, and a cylindrical drainage part of uniform size. The lower water collection plate is located below the upper water collection plate. The lower water collection plate includes multiple rows of U-shaped water collection troughs arranged in sequence. The water collection troughs are arranged parallel to the longitudinal drainage troughs, and one water collection trough is located directly below the drainage part of a row of water collection hoppers. A pair of transverse drainage channels are provided below the longitudinal ends of the lower water collection plate. The transverse drainage channels are perpendicular to the longitudinal drainage channels, and the pair of transverse drainage channels respectively receive the longitudinal ends of the lower water collection plate. The main drainage pipe is connected to a pair of longitudinal drainage channels and a pair of transverse drainage channels via branch pipes. 2) Tighten the two sides of the foundation. The tightening step is achieved by a tightening assembly, which further includes: The clamping structure includes a pair of clamping plates and a clamping sleeve. The pair of clamping plates are symmetrically arranged on both sides of the foundation. The clamping plates are horizontally fixed to a clamping shaft through a horizontal plate. The horizontal plate has a counterweight inside. The clamping shaft has an external thread, and the external threads of the pair of clamping shafts have opposite directions of rotation. The clamping sleeve is horizontally arranged below the foundation. The clamping sleeve has an external thread and two sections of internal threads with opposite directions of rotation. The external threads of the pair of clamping shafts are simultaneously threadedly connected to the two sections of internal threads of the clamping sleeve. Rotating the clamping sleeve causes the pair of clamping plates to move closer together and move towards each other. A traction structure includes a pair of traction plates, a pair of traction springs, and a pair of buffer springs. The outer sides of a pair of clamping plates are connected to the inner sides of a pair of traction plates via a pair of buffer springs. The buffer springs include an upper buffer spring and a lower buffer spring. The bottom of a pair of clamping plates is connected to a horizontal plate via a hinge seat. A pair of longitudinal drainage channels have traction blocks at their bottoms. The traction blocks have inclined traction surfaces. The inner sides of a pair of clamping plates are connected to a pair of traction springs. The traction springs are inclined and connected to the inclined traction surfaces.

2. The method for reinforcing the foundation of highways in freeze-thaw zones as described in claim 1, characterized in that, Filter screens are provided above both the longitudinal drainage channel and the upper water collection plate.

3. The method for reinforcing the foundation of highways in freeze-thaw zones as described in claim 1, characterized in that, The bottom of the upper water collection plate is connected to the top of the lower water collection plate by a protective plate.

4. The method for reinforcing the foundation of highways in freeze-thaw zones as described in claim 1, characterized in that, Angle steel reinforcement plates are provided on the outer sides of a pair of top clamping plates, which are connected to the foundation by high-strength bolts.

5. The method for reinforcing the foundation of highways in freeze-thaw zones as described in claim 1, characterized in that, The traction spring is connected to an extension plate, and the inner sides of a pair of clamping plates are connected to the extension plate via hinge seats.

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