A heavy truck scale independent pier foundation structure and a construction method thereof

Abstract

The present application relates to the technical field of industrial and civil building, and especially relates to a heavy truck scale independent supporting pier foundation structure and a construction method thereof. The heavy truck scale independent supporting pier foundation structure comprises a plurality of independently arranged supporting pier foundations, a common floor structure and a structural joint; each supporting pier foundation is arranged directly below each weighing sensor of the heavy truck scale, and a pre-embedded part for mounting the weighing sensor is arranged on the top of the supporting pier foundation; the common floor structure is arranged in the area between and around the supporting pier foundations; the structural joint is arranged at the junction of each supporting pier foundation and the adjacent floor; and the common floor structure and each supporting pier foundation are completely separated by the structural joint. The present application separates the bearing area and the non-bearing area in function, solves the problems of waste of traditional structural materials and poor settlement control precision under the premise of ensuring the weighing precision, saves the materials, reduces the cost and ensures the weighing precision.

Description

Technical Field

[0001] This invention relates to the field of industrial and civil building technology, and in particular to an independent support foundation structure for heavy vehicle weighbridges and its construction method. Background Technology

[0002] A truck scale, also known as a weighbridge or truck scale, is a large weighing device used to weigh heavy-duty trucks. It is widely used in core business processes such as coal and ore weighing and trade settlement in thermal power plants, mines, and ports. A truck scale typically consists of a foundation structure, a weighing platform, and load cells. During weighing, the loaded vehicle drives onto the weighing platform, which transfers the vehicle's load to multiple load cells distributed below it. The load cells convert the weight signal into an electrical signal output, thus achieving the overall vehicle weight. The installation positions of the load cells are the core stress points of the foundation structure, and their levelness and the height differences between them directly determine the weighing accuracy.

[0003] Currently, the foundations of heavy vehicle scales generally adopt a monolithic reinforced concrete structure. The specific method is as follows: A large, monolithic reinforced concrete base slab is poured according to the length and width dimensions of the scale. The base slab thickness is typically no less than 500mm. Supports are installed at the four corners and in the middle of the base slab, with embedded parts at the top of the supports for installing load cells. The base slab is the same length and width as the scale, and pile foundations are usually installed along its entire length below it. Especially in soft soil areas, a uniform, full-area pile foundation is used, forming a large slab foundation with piles throughout. During construction, the large-area pile foundation is constructed first, followed by the overall binding of reinforcing steel, formwork erection, and pouring of the concrete base slab and supports. After curing to the design strength, the load cells and scale body are installed.

[0004] The aforementioned traditional structure has the following problems: First, the load cells are only distributed at a few support points of the weighing instrument. The actual stress area of ​​the base plate is concentrated only around the supports, while the remaining large area of ​​the base plate is only used as a vehicle passageway and does not bear the weighing load, yet it is filled with concrete of the same thickness as the load-bearing area, resulting in material waste. Second, the pile foundations under the base plate are evenly distributed across the entire surface, but the actual load is only transmitted downwards through the supports. The pile foundations in the areas not under the supports basically do not bear the vehicle load, resulting in an excessive number of pile foundations. Third, the vehicle load spreads to the foundation through the large area of ​​the base plate, resulting in a long force transmission path. The settlement calculation involves many uncertainties, making it difficult to accurately control the differential settlement between each weighing support point. The height difference between the sensor installation points directly determines the weighing accuracy. Fourth, the construction of the large base plate and the full-area pile foundation requires a large amount of concrete and steel reinforcement, has a long curing period, and is costly. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide an independent support pier foundation structure for heavy vehicle weighbridges and its construction method. This aims to solve the problems of large concrete consumption, unreasonable pile foundation layout, and poor settlement control accuracy in traditional heavy vehicle weighbridge foundations, thereby achieving the goals of saving materials, reducing costs, and ensuring weighing accuracy.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: In a first aspect, embodiments of the present invention provide an independent support foundation structure for a heavy vehicle scale, comprising multiple independently set support foundations, a general ground structure, and structural joints; the support foundations are respectively set directly below each weighing sensor of the heavy vehicle scale, and the top of the support foundation is provided with embedded parts for installing the weighing sensors; the general ground structure is set in the area between and around each support foundation; the structural joints are set at the junction of each support foundation and the adjacent ground; and the general ground structure is completely separated from each support foundation through the structural joints.

[0007] As a further technical solution, the pier foundations are connected by connecting beams. The pier foundations are precast concrete piers or steel piers, with steel plates welded to the bottom and adjustable leveling bolts on the top.

[0008] As a further technical solution, each pier foundation is provided with a pile foundation below it, and the top of the pile foundation is part of the pier foundation, with the pile reinforcement anchored into the pier foundation concrete to form an integrated pile-pier structure.

[0009] As a further technical solution, inclined piles are used under the support foundation, with the angle between the inclined piles and the vertical direction being 10-20 degrees, or micro steel pipe piles or grouting micro piles are used under the support foundation.

[0010] As a further technical solution, the bottom of the support foundation is provided with an enlarged foundation, and a crushed stone cushion layer or a lime-soil cushion layer is laid under the enlarged foundation.

[0011] As a further technical solution, two or more small supports are arranged in parallel under each weighing sensor, and the small supports are connected by reinforced concrete connecting beams.

[0012] As a further technical solution, the structural joint is filled with elastic sealing material, or an elastic material layer is sandwiched in the structural joint, or a steel plate is pre-embedded on the side of the support and a corresponding sliding steel plate is pre-embedded in the ground and the two are coated with graphite or polytetrafluoroethylene, or the outside of the support foundation is wrapped with polystyrene foam board or plastic corrugated sleeve and a cavity is formed after the ground is poured and sealant is injected, or the side of the support is coated with asphalt or an asphalt felt isolation layer is laid.

[0013] As a further technical solution, the ordinary floor structure is equipped with a double-layer bidirectional steel mesh, or the ordinary floor structure is a steel fiber concrete floor, or the ordinary floor structure is a precast reinforced concrete slab floor, with tongue and groove joints between adjacent slabs and the edges of the slabs resting on concrete pads around the piers, or the ordinary floor structure is an asphalt concrete pavement, with an isolation layer laid between the asphalt concrete pavement and the sidewalls of the piers, or steel grating or patterned steel plates are laid between each pier.

[0014] As a further technical solution, the heavy vehicle scale is provided with ramps at both ends, which are connected to the ground structure. The ramps are integrally cast with the ordinary ground structure, or the top of the ramp is provided with a steel bridge plate with adjustable height and the steel bridge plate is connected by bolts.

[0015] Secondly, embodiments of the present invention also provide a construction method for an independent support pier foundation structure for a heavy-duty vehicle scale, comprising: The planar position of each support foundation is determined by laying out the positioning lines based on the dimensions of the heavy vehicle scale and the position of the weighing sensors. When the bearing capacity of the foundation is insufficient, pile foundation construction is carried out only at the location corresponding to the pier foundation. The pier foundation is poured on the top of the pile foundation or the bearing layer of the foundation. The formwork is erected, the steel bars are tied, and the concrete is poured to form an independent pier foundation. Embedded parts are installed on the top and the elevation and level of the top surface are controlled. After the concrete of the support foundation reaches the design strength, ordinary floor construction is carried out. The steel mesh is tied, the formwork is erected, and the concrete is poured to form an integral and continuous floor structure. A gap is reserved between the floor and the support foundation and the gap is filled with elastic sealing material. After all the concrete has reached its design strength, the weighing sensors and the vehicle scale body will be installed.

[0016] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: This invention decomposes the traditional monolithic base slab into two functional modules: independently set support foundations and a general floor structure. The support foundations are only located directly below the load cells, concentrating concrete material in the actual load-bearing support areas. The general floor structure is located between and around the support foundations, serving only as a vehicle passageway. Structural separation completely isolates the support foundations from the general floor structure, preventing the floor from participating in load transfer. This independent support foundation and general floor structure design reduces concrete usage by 50% to 70% and steel reinforcement usage by 40% to 60%. Regarding settlement control, because the support foundations are independent and separated from the floor, floor settlement does not affect the position and orientation of the support foundations. The settlement of each support foundation can be calculated and controlled independently, ensuring the levelness of the load cell installation points and avoiding the problems of long force transmission paths and numerous settlement influencing factors inherent in traditional large-area base slabs. Pile foundations are only installed below the support foundations, omitting pile foundations in non-load-bearing areas, avoiding the waste of a full-area pile foundation and reducing the number of pile foundations by 60% to 80%. Therefore, by separating the functions of the load-bearing area and the non-load-bearing area, this invention solves the problems of material waste and poor settlement control accuracy in traditional structures while ensuring weighing accuracy.

[0017] Advantages of additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, the dimensions or spacing between the components are exaggerated to show the position of each component, and the schematic diagrams are for illustrative purposes only.

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of a traditional heavy vehicle scale foundation; Figure 2 This is a plan view of the heavy-duty vehicle scale foundation structure provided in an embodiment of the present invention; Figure 3 This is a cross-sectional view of the heavy-duty vehicle scale foundation structure provided in an embodiment of the present invention; Figure 4 This is a flowchart of the construction method for the independent support pier foundation structure of the heavy vehicle scale provided in the embodiment of the present invention; In the diagram: 1. Pile foundation; 2. Base slab; 3. Sensor; 4. Connecting beam; 5. Pier foundation; 6. Ordinary ground structure; 7. Structural joint separation; 8. Slope. Detailed Implementation To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0020] Generally speaking, the terms "comprising" and "including" only indicate that the steps and elements are explicitly identified, and these steps and elements do not constitute an exclusive list. The method or apparatus may also include other steps or elements.

[0021] Example 1 like Figure 1 As shown, traditional methods suffer from significant material waste due to large-area foundation slabs and full-span pile foundations. This embodiment functionally separates load-bearing and non-load-bearing areas based on their stress characteristics, such as... Figure 2 , Figure 3 As shown, the system includes multiple independently installed support foundations, a standard floor structure, and structural joints. The support foundations are respectively located directly below each load cell of the heavy vehicle scale. The top of each support foundation has an embedded part for installing the load cell. The standard floor structure is located between and around each support foundation. The structural joints are located at the junction of each support foundation and the adjacent floor. The standard floor structure is completely separated from each support foundation through the structural joints.

[0022] A pier foundation refers to an independent concrete or steel support structure located directly below the load cell, used to bear vehicle loads and transfer them to the ground. A standard pavement structure refers to the road surface, 250-350mm thick, located between and around the pier foundations; it is used solely for vehicle traffic and does not contribute to load transfer. A structural joint refers to a gap between the pier foundation and the standard pavement, used to structurally separate the two. Embedded components refer to metal members pre-embedded in the top of the pier foundation for fixing and installing the load cell.

[0023] The number of support foundations corresponds to the number of load cells, typically ranging from 4 to 8 depending on the scale specifications. Each support foundation is distributed horizontally directly below the load cell mounting points, with its planar dimensions being 2-3 times the size of the load cell base. The top elevation of each support foundation must be strictly consistent, with an allowable deviation of ≤±2mm. Embedded parts are installed at the top of each support foundation, and the top surface elevation of these embedded parts must be strictly controlled to ensure that all load cells are installed on the same horizontal plane. The ordinary pavement structure is poured after the support foundation construction is completed, with its bottom surface located between the support foundations, forming a continuous road surface for vehicles. Structural joints are located at the interface between the sidewall of the support foundation and the ordinary pavement, structurally separating the pavement from the support foundation.

[0024] The independent placement and corresponding number of pier foundations to the sensors concentrate concrete material at the actual load-bearing points, avoiding the significant material waste in non-load-bearing areas typical of traditional large-area foundations. Structural joints completely separate the ordinary ground surface from the pier foundations, allowing the ground surface to function solely as a road surface without participating in load transfer. Settlement or deformation of the ground surface under vehicle traffic will not affect the position or orientation of the pier foundations. The embedded parts located at the top of the pier foundations ensure that the installation reference surface of the weighing sensors is independent of the surrounding ground surface. Even if local settlement occurs due to repeated vehicle traffic, the height difference between the sensors will not change. These features work together to reduce material usage while maintaining weighing accuracy. Compared to traditional large-area foundation structures, concrete usage can be reduced by 50% to 70%, and steel reinforcement usage by 40% to 60%.

[0025] When bearing vehicle loads, the relative displacement between the piers needs to be controlled. Excessive differences in the independent settlement of each pier can affect the levelness of the sensors. Connecting beams were added to the individual pier foundations, linking the pier foundations together. Two alternative foundation options were provided: precast concrete piers or steel piers. The steel piers have welded steel plates at the bottom and adjustable leveling bolts at the top.

[0026] Connecting beams are reinforced concrete beams installed between adjacent pier foundations, with both ends connected to the sidewalls of the pier foundations. The purpose of connecting beams is to integrate the independent pier foundations into a whole, improving the overall horizontal stiffness of the foundation structure. Horizontal impact loads generated during vehicle start-up or braking can be distributed among multiple piers through the connecting beams, preventing horizontal displacement of individual piers. Furthermore, connecting beams help to balance the settlement between piers, keeping the differential settlement of sensor installation points within acceptable limits. Precast concrete piers are prefabricated concrete components manufactured in a factory and directly hoisted into place on site. They are suitable for sites with good foundation conditions that do not require pile foundations, shortening the on-site construction period and reducing on-site wet work. Steel piers use H-beams or short steel-concrete composite columns, with welded steel plates at the bottom to increase the contact surface with the foundation or pile cap. Adjustable leveling bolts are installed at the top, allowing for local height adjustments during sensor installation. This ensures the sensor's levelness even if there are deviations in the pier foundation construction elevation, improving installation tolerance.

[0027] In soft soil areas or sites with insufficient bearing capacity, pile foundations are required beneath the pier foundations to bear the load. Each pier foundation is supported by a pile foundation, with the top of the pile foundation serving as part of the pier foundation and the pile reinforcement anchored into the pier foundation concrete to form an integrated pile-pier structure.

[0028] Each pier foundation is supported by piles, but these piles are only located directly beneath the pier foundation; no piles are placed beneath the ordinary ground level. The top of the pile is directly embedded in the concrete of the pier foundation, and the longitudinal reinforcement of the pile is anchored upwards into the pier foundation, making the pile and pier foundation a unified whole. This integrated pile-pier structure eliminates the need for traditional independent pile caps, resulting in a more direct force transmission path: vehicle loads are transferred from the load cell through embedded parts to the pier foundation, and then directly to the deep soil through the piles. Because the piles are only located beneath the piers where stress is concentrated, the number of piles can be reduced by 60% to 80% compared to the traditional full-area arrangement. Simultaneously, the anchoring of the pile reinforcement into the pier foundation enhances the bending and shear resistance of the joint, providing better load-bearing performance under eccentric vehicle loads or horizontal impact loads.

[0029] In locations where vehicles frequently start and stop, the horizontal impact load is significant, and the horizontal resistance capacity of conventional vertical piles is sometimes insufficient. This embodiment provides two pile types: inclined piles and micropiles. Inclined piles are used under the pier foundation, with the angle between the inclined pile and the vertical direction being 10-20 degrees. Alternatively, micro steel pipe piles or grouting micropiles are used under the pier foundation.

[0030] Inclined piles are pile foundations where the pile axis forms a certain angle with the vertical direction, typically controlled between 10 and 20 degrees. When a vehicle starts or brakes on a weighing platform, a horizontal force is generated. Inclined piles can convert this horizontal force into axial force within the pile body, while the pile foundation has a high axial bearing capacity. Using inclined piles enhances the foundation structure's resistance to horizontal impact loads, making them suitable for locations with frequent vehicle starts and stops, such as docks and ports. Miniature steel pipe piles refer to steel pipe piles with a diameter of 100mm to 200mm. Grouting miniature piles are small-diameter piles formed by placing reinforcing bars or steel pipes in a drilled hole and then injecting cement grout. Miniature pile construction equipment is small in size and low in noise, making it suitable for space-constrained renovation projects or foundation reinforcement around existing buildings. Pile foundation construction can be completed without affecting normal production.

[0031] When the bearing stratum of the foundation is shallow and the bearing capacity basically meets the requirements, an enlarged foundation can be used instead of a pile foundation: the bottom of the pier foundation is provided with an enlarged foundation, and a crushed stone cushion layer or a lime-soil cushion layer is laid under the enlarged foundation.

[0032] The spread foundation is located at the bottom of the pier foundation, with a plan dimension 2 to 4 times that of the pier foundation cross-section, and is constructed using reinforced concrete cast-in-place. The function of the spread foundation is to distribute the load transferred from the pier foundation over a larger foundation area, reducing the compressive stress per unit area of ​​the foundation. A 100mm to 200mm thick crushed stone or lime-soil cushion layer is laid under the spread foundation to level the ground and improve its bearing capacity. The crushed stone cushion layer uses graded crushed stone, which is compacted and has good drainage performance, preventing water accumulation and soil softening at the base. The lime-soil cushion layer is made by mixing lime and cohesive soil in a certain proportion and then compacting it in layers, providing high bearing capacity and water stability.

[0033] For ultra-heavy-duty weighing instruments with a load capacity of over 150 tons, the load that a single support needs to bear is large, and the size of a conventional support may be too large. Therefore, two or more small supports can be arranged in parallel under each weighing sensor, and the small supports are connected by reinforced concrete connecting beams.

[0034] The load originally borne by a single support pier is distributed to two or more smaller supports, each with a smaller cross-sectional dimension, symmetrically arranged around the center point of the sensor in plan view. These smaller supports are connected as a whole by reinforced concrete connecting beams, which link the tops of each smaller support together, allowing them to share the load collaboratively. When a vehicle load is applied to the sensor location, the load is evenly distributed to each smaller support pier through embedded parts and the connecting beam system, preventing load concentration on a single pier and thus avoiding localized overloading of the foundation. This parallel multi-support method increases the foundation's bearing capacity without increasing the size of individual supports, making it suitable for the support requirements of ultra-heavy-duty weighing equipment.

[0035] Structural jointing is a key construction for achieving functional separation between the pier foundation and the ordinary ground. This embodiment provides several implementation methods for structural jointing: the structural joint is filled with elastic sealing material, or an elastic material layer is sandwiched in the structural joint, or a steel plate is pre-embedded on the side of the pier and a corresponding sliding steel plate is pre-embedded in the ground, with graphite or polytetrafluoroethylene coated between the two, or the outside of the pier foundation is wrapped with polystyrene foam board or plastic corrugated sleeve and a cavity is formed after the ground is poured and sealed with sealant, or the side of the pier is coated with asphalt or covered with an asphalt felt isolation layer.

[0036] Elastic sealing materials, such as polyurethane sealant or asphalt-impregnated hemp fiber, are used to fill gaps and seal them, accommodating minor deformations. An elastic material layer refers to a 10mm to 30mm thick rubber sheet, polyurethane elastomer, or asphalt felt sandwiched between the abutment and the ground, achieving both load isolation and absorption of horizontal deformation. The sliding bearing connection method involves pre-embedding steel plates on the side of the abutment and at corresponding positions on the ground, with graphite or polytetrafluoroethylene coated between them to form a sliding interface. This allows for vertical relative displacement between the abutment and the ground without transmitting horizontal forces, suitable for applications with large horizontal loads. The isolation sleeve method involves wrapping the outside of the abutment foundation with polystyrene foam board or corrugated plastic sleeves. After the ground is poured, the foam board forms an isolation cavity, which is then filled with sealant, providing good vibration isolation. The simplest method is to apply asphalt or lay asphalt felt as an isolation layer on the side of the abutment before pouring the ground, allowing the two to separate naturally. All of the above-mentioned structures achieve the function of separating the pier foundation from the ground, and the appropriate solution can be selected according to the construction conditions and usage requirements.

[0037] Ordinary pavement structures are used only as vehicle passageways and do not participate in load transfer, so their construction can be diversified: the ordinary pavement structure is equipped with a double-layer bidirectional steel mesh, or the ordinary pavement structure is a steel fiber concrete pavement, or the ordinary pavement structure is a precast reinforced concrete slab pavement with tongue and groove joints between adjacent slabs and the edges of the slabs resting on concrete pads around the piers, or the ordinary pavement structure is an asphalt concrete pavement with an isolation layer laid between the asphalt concrete pavement and the sidewalls of the piers, or steel grating or patterned steel plates are laid between each pier.

[0038] Double-layer bidirectional steel mesh refers to two layers of perpendicular steel mesh within a concrete slab. The steel bars typically have a diameter of 10mm to 14mm and a spacing of 150mm to 200mm. This effectively controls shrinkage and temperature cracks in the concrete, ensuring the smoothness and durability of the floor under repeated vehicle traffic. Steel fiber reinforced concrete flooring incorporates steel or polypropylene fibers into the concrete. The fibers form a three-dimensional, randomly distributed reinforcement system within the concrete, reducing or even eliminating the need for steel mesh and simplifying construction procedures. Precast reinforced concrete slab flooring uses factory-prefabricated concrete slabs. Tongue-and-groove joints are used between the slabs for a seamless connection. The edges of the slabs rest on concrete spacers around the supports, naturally detaching from the supports for easy removal and replacement during future maintenance. Asphalt concrete pavement uses a base course plus a surface layer structure, with a thickness of 200mm to 300mm. An isolation layer is laid between the pavement and the sidewalls of the supports. This type of pavement is suitable for factory roads in high-temperature or freezing areas. Steel grating or checkered steel plates are laid between the supports. The steel grating or checkered steel plates can be lifted at any time to facilitate the maintenance of pipes or cables below, making it suitable for industrial sites with dense equipment.

[0039] The ramp is a structure that guides vehicles smoothly onto the weighing platform, and its connection with the ground structure and the weighing instrument is related to traffic safety. Therefore, the heavy vehicle scale is equipped with ramps at both ends, which are seamlessly connected to the ground structure. The ramps are integrally cast with the ordinary ground structure, or the top of the ramp is equipped with an adjustable-height steel bridge plate connected by bolts.

[0040] Approach ramps are installed at the vehicle entry and exit points of the heavy-duty weighbridge, bridging the height difference between the ground level and the weighbridge panel, allowing vehicles to transition smoothly. The integrated pouring of the approach ramps and the ordinary ground structure is suitable for situations where the ground elevation and the weighbridge panel elevation are basically matched. This integrated pouring avoids joint treatment and simplifies construction. The adjustable-height steel bridge plate solution involves installing a steel bridge plate at the top of the approach ramp. The height of the bridge plate is adjusted via bolts. When uneven settlement occurs during use of the approach ramp or the ground level, the tilt angle of the bridge plate is changed by adjusting the bolts, maintaining a smooth height difference between the approach ramp and the weighbridge panel and preventing impact loads from vehicles passing through. This feature works synergistically with the aforementioned structural joint feature: structural joints ensure that ground settlement does not affect the posture of the pier foundation, while adjustable approach ramps adaptively adjust to traffic conditions after settlement occurs. Together, these features improve the performance of the foundation structure throughout its entire life cycle.

[0041] Advantages compared to existing technologies: 1. Significantly reduces material usage and lowers project costs.

[0042] This invention optimizes the traditional monolithic foundation slab (thickness ≥ 500 mm) into a system where only the pier area is locally reinforced and the ground area is used solely for road surface (thickness 250~350 mm). This reduces concrete usage by 50%~70% and steel reinforcement usage by 40%~60%. When using pile foundations, the number of piles can be reduced by 60%~80%, resulting in an overall cost reduction of approximately 30%~50%.

[0043] 2. The force transmission path is clear, and the load-bearing capacity is safe and reliable.

[0044] The vehicle load is directly transferred to the ground or pile foundation through the weighing instrument → weighing sensor → embedded parts → independent support foundation, without relying on the diffusion of a large area of ​​the base plate. The force path is clear and the structure is highly safe.

[0045] 3. Precise settlement control.

[0046] Each support foundation is independent of the others, with structural joints between it and the ground. Ground settlement and deformation will not affect the orientation and position of the support foundations. The settlement of the support foundations is calculated and controlled independently, ensuring that all load cells are on the same horizontal plane and that the weighing accuracy is reliable.

[0047] 4. The pile foundation layout is economical and reasonable.

[0048] Pile foundations are only installed under the piers where the stress is concentrated, and no pile foundations are installed in non-stress areas, which avoids the waste of traditional full-area pile foundations and is particularly suitable for heavy vehicle weighbridge foundation projects in soft soil areas.

[0049] 5. The construction is simple and the construction period is shortened.

[0050] Independent pier foundation construction is flexible and can be carried out in sections; ordinary ground can be formed by one-time pouring of commercial concrete, which simplifies construction organization and shortens the construction period by about 20% to 30% compared with traditional methods.

[0051] 6. Easy to maintain and modify.

[0052] Each support foundation is independent. When the weighing sensor is replaced or the foundation is reinforced, only the corresponding support needs to be treated, without affecting other areas.

[0053] Example 2 This embodiment provides a construction method for an independent support pier foundation structure for a heavy vehicle scale, such as... Figure 4As shown, the process includes: determining the planar position of each support foundation by laying out the layout lines according to the dimensions of the heavy truck scale and the location of the weighing sensors; constructing pile foundations only at the corresponding locations of the support foundations when the bearing capacity of the foundation is insufficient; pouring the support foundations on the top of the pile foundations or on the bearing layer of the foundation, setting up formwork, tying reinforcing bars, and pouring concrete to form independent support foundations, embedding pre-embedded parts on the top, and controlling the elevation and levelness of the top surface; after the support foundation concrete reaches the design strength, constructing ordinary ground, tying reinforcing mesh, setting up formwork, and pouring concrete to form an integral and continuous ground structure, leaving gaps between the ground and the support foundations, and filling the gaps with elastic sealing material; and installing the weighing sensors and the heavy truck scale body after all the concrete reaches the design strength.

[0054] The positioning and layout step involves determining and marking the center point of each support foundation on-site based on the design drawings. The positioning accuracy directly affects the correspondence between the positions of subsequent embedded parts and sensors.

[0055] In the pile foundation construction process, piles are only constructed at the corresponding locations of the abutment foundations. Precast piles are driven using static pressure or hammer driving methods, while cast-in-place piles are constructed by mechanically drilling holes, placing the reinforcing cage, and then pouring concrete. If the bearing capacity of the foundation meets the requirements, this step can be omitted, and the abutment foundations can be constructed directly on the natural ground.

[0056] In the process of pouring the foundation of the pier, the formwork is installed on the top of the pile foundation or the bearing layer of the foundation, the reinforcing steel is tied, and the concrete is poured. Before the concrete sets, the embedded parts are installed in the design position. The elevation and levelness of the top surface of each embedded part are strictly controlled by a level and a spirit level, and the allowable deviation is no more than ±2mm.

[0057] The construction process for ordinary floor slabs is carried out after the foundation supports have reached their design strength, at which point the foundation supports are capable of bearing subsequent construction loads. The process involves binding the reinforcing mesh, erecting formwork, and pouring concrete to form a continuous floor structure. An isolation layer or a pre-existing gap is placed between the sidewalls of the foundation supports and the floor slab. The gap width is typically 20mm to 50mm, and then filled with an elastic sealant.

[0058] Finally, after all the concrete has reached its design strength, the weighing sensors and the vehicle scale are installed to complete the construction of the entire foundation structure.

[0059] Constructing the pier foundations first, followed by the ordinary floor slab, allows the pier foundations to serve as the working surface during floor slab construction, while avoiding construction joints caused by pouring the floor slab first and then excavating the pier foundations. Floor slab construction does not begin during the pier foundation curing period, making parallel operation possible and allowing for flexible segmented construction organization. The feature of constructing pile foundations only at the corresponding locations of the pier foundations significantly reduces the amount of pile foundation work, correspondingly shortening the pile foundation construction period. The use of early-strength concrete mix proportions or rapid-hardening cement allows the pier foundations to reach their design strength within 24 hours, followed immediately by floor slab construction, reducing the overall construction period by 20% to 30% compared to traditional methods.

[0060] While the specific embodiments of the present invention have been described above, they are not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A foundation structure for an independent support pier of a heavy-duty vehicle scale, characterized in that, This includes multiple independently installed support foundations, as well as ordinary floor structures and structural joints. The support foundations are respectively set directly below each weighing sensor of the heavy vehicle scale. The top of the support foundation is provided with embedded parts for installing the weighing sensors. The ordinary floor structure is set between and around each support foundation. The structural joint is set at the junction of each support foundation and the adjacent floor. The ordinary floor structure is completely separated from each support foundation through the structural joint.

2. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, The pier foundations are connected by connecting beams. The pier foundations are either precast concrete piers or steel piers. The bottom of the steel pier is welded with a steel plate and the top is equipped with adjustable leveling bolts.

3. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, Each pier foundation is supported by pile foundations. The top of the pile foundations is part of the pier foundations, and the pile reinforcement is anchored into the pier foundation concrete to form an integrated pile-pier structure.

4. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, The foundation of the pier is supported by inclined piles with an angle of 10-20 degrees between the inclined piles and the vertical direction, or by micro steel pipe piles or grouting micro piles.

5. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, The base of the pier foundation is provided with an enlarged foundation, and a crushed stone cushion layer or a lime-soil cushion layer is laid under the enlarged foundation.

6. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, Each load cell is supported by two or more small supports arranged in parallel, and the small supports are connected by reinforced concrete connecting beams.

7. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, The structural joint is filled with elastic sealing material, or an elastic material layer is sandwiched in the structural joint, or a steel plate is pre-embedded on the side of the support and a corresponding sliding steel plate is pre-embedded in the ground and the two are coated with graphite or polytetrafluoroethylene, or the outside of the support foundation is wrapped with polystyrene foam board or plastic corrugated sleeve and a cavity is formed after the ground is poured and sealant is injected, or the side of the support is coated with asphalt or an isolation layer of asphalt felt is laid.

8. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, The ordinary floor structure is equipped with a double-layer bidirectional steel mesh, or the ordinary floor structure is steel fiber concrete floor, or the ordinary floor structure is precast reinforced concrete slab floor, with tongue and groove joints between adjacent slabs and the edges of the slabs resting on concrete pads around the piers, or the ordinary floor structure is asphalt concrete pavement, with an isolation layer laid between the asphalt concrete pavement and the sidewalls of the piers, or steel grating or patterned steel plates are laid between each pier.

9. The independent support pier foundation structure for heavy vehicle scales as described in claim 1, characterized in that, The heavy vehicle scale is equipped with ramps at both ends, which are connected to the ground structure. The ramps are integrally cast with the ordinary ground structure, or the top of the ramp is equipped with a steel bridge plate with adjustable height and the steel bridge plate is connected by bolts.

10. A construction method for an independent support pier foundation structure for a heavy vehicle weighbridge, characterized in that, include: The planar position of each support foundation is determined by laying out the positioning lines based on the dimensions of the heavy vehicle scale and the position of the weighing sensors. When the bearing capacity of the foundation is insufficient, pile foundation construction is carried out only at the location corresponding to the pier foundation. The pier foundation is poured on the top of the pile foundation or the bearing layer of the foundation. The formwork is erected, the steel bars are tied, and the concrete is poured to form an independent pier foundation. Embedded parts are installed on the top and the elevation and level of the top surface are controlled. After the concrete of the support foundation reaches the design strength, ordinary floor construction is carried out. The steel mesh is tied, the formwork is erected, and the concrete is poured to form an integral and continuous floor structure. A gap is reserved between the floor and the support foundation and the gap is filled with elastic sealing material. After all the concrete has reached its design strength, the weighing sensors and the vehicle scale body will be installed.

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