A roof pile foundation construction support platform

Abstract

This application discloses a construction support platform for slab pile foundations, belonging to the field of construction, used to solve the problem of how to improve the stability of construction support platforms. The slab pile foundation construction support platform includes: support columns, jacks, a basement floor slab, a basement roof slab, a gravel layer, steel beams, and a roadbed plate. At least two sets of support columns and jacks are provided. In each set, the bottom end of the support column is fixed to the basement floor slab, serving as the support foundation. The jacks are installed at the top of the support columns and used to support the basement roof slab. The basement roof slab serves as the intermediate load-bearing structure. The steel beams are fixed to the upper end of the basement roof slab, forming the main load-bearing frame. The roadbed plate is fixed to the upper end of the steel beams, forming a gravel filling area between the roadbed plate and the basement roof slab, and on both sides of the steel beams. The gravel layer fills the gravel filling area.

Description

Technical Field

[0001] This application relates to the field of construction, and in particular to a support platform for the construction of a top slab pile foundation. Background Technology

[0002] The steel platform, cutting beams, and cantilevered areas of the foundation pile construction platform typically require support. Traditional construction support platforms are usually built directly onto the foundation. These platforms mostly employ single-layer or relatively simple double-layer support structures; for example, a common combination is steel pipes combined with steel plates. In terms of load distribution, they mainly rely on rigid concrete pads or steel plates alone. However, using this structure in underground building structures suffers from a lack of necessary flexible leveling mechanisms. Due to this lack of mechanisms, stress can easily become excessively concentrated in certain areas, making it difficult to effectively protect existing underground structures from damage, resulting in structural instability.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This application provides a construction support platform for slab pile foundations, which can solve the problem of how to improve the stability of construction support platforms in the prior art.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0008] A construction support platform for slab pile foundation is provided, which includes: support columns, jacks, basement floor slab, basement roof slab, crushed stone layer, steel beams and roadbed plates;

[0009] The supporting columns and jacks are provided in at least two sets. In the same set of supporting columns and jacks, the bottom end of the supporting column is fixed to the basement floor slab as a supporting foundation, and the jack is installed at the top of the supporting column and is used to support the basement roof slab.

[0010] The basement roof slab serves as the intermediate load-bearing structure.

[0011] The steel beams are fixed to the upper end of the basement roof slab, forming the main load-bearing frame;

[0012] The roadbed plate is fixed to the upper end of the steel beam, and a gravel filling area is formed between the roadbed plate and the basement roof slab on both sides of the steel beam.

[0013] The crushed stone layer fills the crushed stone filling area.

[0014] The top slab pile foundation construction support platform also includes a shim, which is located between the steel beam and the basement roof slab to leave the bottom of the steel beam empty.

[0015] In some embodiments, the lower end of the basement roof slab is provided with a beam structure, which is supported by the jacks.

[0016] In some embodiments, the steel beam is an I-beam, which includes reinforcing ribs on the outer side to improve its load-bearing capacity.

[0017] In some embodiments, at least three steel beams are provided and arranged in parallel and at equal intervals, and the roadbed plate is simultaneously disposed on the upper end of at least two of the steel beams.

[0018] In some embodiments, the steel beam is fixed to the basement roof slab by bolts.

[0019] In some implementations, the base of the support column is fixed to the basement floor slab by bolts.

[0020] In some embodiments, the roadbed plate is composed of precast concrete slabs and is fixed to the steel beams by connectors.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the beneficial effects of the technical solution provided in this application include at least the following:

[0023] This application introduces a multi-layered support structure for the roof slab pile foundation construction support platform, enhancing overall stability. The support columns, as the main load-bearing components, are topped with jacks to support the basement roof slab. These jacks not only increase the platform's height adjustment capability but also provide a degree of buffering through their elastic support characteristics. The basement roof slab bears a crucial load-bearing function, transferring the load to the support columns and jacks, avoiding the single path of direct load transfer to the foundation as in traditional platforms, thus reducing the risk of stress concentration. Steel beams are fixed to the basement roof slab, forming the main load-bearing frame. The roadbed plate is fixed to the upper end of the steel beams, forming the construction working surface. This multi-layered structure significantly improves the platform's overall rigidity and load-bearing capacity.

[0024] Meanwhile, the top slab pile foundation construction support platform of this application provides a flexible leveling mechanism to avoid stress concentration: the basement top slab is supported by at least two sets of support columns and jacks, which helps to disperse stress; at the same time, the jacks are installed at the top of the support columns and can be adjusted in height according to actual needs. This adjustment capability allows the platform to adapt to uneven settlement or inclined ground conditions, thereby achieving uniform load distribution; and a gravel filling area is set between the roadbed plate and the basement top slab, and filled with a gravel layer. The gravel layer has good buffering performance and can absorb part of the impact load, further dispersing stress.

[0025] Equally important, the top slab pile foundation construction support platform of this application can optimize the load distribution path and protect the underground structure. Compared with traditional construction platforms that mainly rely on rigid concrete cushion layers or use steel plates alone to distribute the load, the load of this application is transferred from the roadbed plate to the steel beams and crushed stone layer, then through the basement roof slab to the jacks and support columns, and finally to the basement floor slab. This multi-level transfer path significantly reduces the load concentration of individual components. Among them, the crushed stone layer plays a role in stress buffering and dispersion, and the support columns can stably transfer the load to the basement floor slab, avoiding structural damage caused by unstable support.

[0026] The top slab pile foundation construction support platform solves the problems of traditional construction platforms lacking flexible leveling mechanisms, insufficient structural stability, and inability to effectively protect underground structures by introducing multi-layer support structures, flexible leveling mechanisms, and optimized load distribution paths. It not only improves construction efficiency and safety but also extends the service life of the platform, and has significant engineering application value. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a front view of the top slab pile foundation construction support platform in the embodiments of this application;

[0029] Figure 2 This is a side view of the top slab pile foundation construction support platform in the embodiments of this application;

[0030] Figure 3 This is a top view of the top slab pile foundation construction support platform in the embodiments of this application.

[0031] Attached diagram labels: 1. Support column; 2. Jack; 3. Basement floor slab; 4. Basement roof slab; 5. Crushed stone layer; 6. Steel beam; 7. Roadbed plate; 8. Gasket; 9. Pressure sensor; 40. Beam structure; 60. Reinforcing rib.

[0032] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Traditional construction support platforms are generally built directly on the foundation and often use single-layer or simple double-layer support (such as steel pipe + steel plate). They often use rigid concrete pads or single steel plates to distribute the load, lacking a flexible leveling mechanism, which can easily lead to stress concentration and make it difficult to protect existing underground structures.

[0036] To address the aforementioned technical problems, this embodiment provides a support platform for top slab pile foundation construction. (See reference...) Figures 1 to 3 As shown, Figure 1 This is a front view of the top slab pile foundation construction support platform in this embodiment of the application. Figure 2 This is a side view of the top slab pile foundation construction support platform in this embodiment of the application. Figure 3 This is a top view of the top slab pile foundation construction support platform in the embodiments of this application.

[0037] The top slab pile foundation construction support platform in this embodiment includes: support column 1, jack 2, basement floor slab 3, basement roof slab 4, crushed stone layer 5, steel beam 6, and roadbed slab 7.

[0038] The support column 1 and jack 2 are provided in at least two sets. The specific number of sets is selected according to the load to be supported. In the same set of support column 1 and jack 2, the bottom end of the support column 1 is fixed on the basement floor slab 3 as a support foundation. The jack 2 is installed on the top of the support column 1 and is used to support the basement roof slab 4. The support column 1 can be a steel pipe, such as a hot-rolled seamless round steel pipe, and the jack 2 can be a 50t hydraulic jack.

[0039] The basement roof slab 4 serves as the intermediate load-bearing structure; the steel beam 6 is fixed to the upper end of the basement roof slab 4, forming the main load-bearing frame; the roadbed slab 7 is fixed to the upper end of the steel beam 6, and forms a gravel filling area between it and the basement roof slab 4, and on both sides of the steel beam 6; the gravel layer 5 is filled in the gravel filling area.

[0040] For example, the construction process of the steel pipe and jack 2 for the support platform of the top slab pile foundation is as follows: steel pipe positioning and layout, measuring the height between floor slabs, fabricating the column steel pipe, installing the column steel pipe, and placing jack 2 to tighten the beam or slab. Specifically, steel pipe positioning and layout: According to the backfilling plan, mark the center of the steel pipe plane, and use a chalk line to mark the shape of the 250*250mm steel pad at the bottom of the steel pipe for placing the steel pipe column. Height measurement: At the layout point, use a laser rangefinder to measure the height H between the floors. Then the length of the steel pipe is h = height H - thickness of 3 steel plates 3*20mm - height of jack 2 350mm - reserved extension value 50mm = H - 460mm. The allowable deviation of the steel pipe is +20mm to -50mm. Fabricating the steel pipe columns: Cut the steel pipes according to the measured length. When cutting, ensure the cuts are on the same plane; therefore, first mark the cutting line with a pen, then cut the steel pipes using a plasma cutter. Then, fully weld the ends of the steel pipes to the center of the steel plate. Installing the steel pipe columns: Transport the steel pipes to the installation point using a forklift. Have 2-3 people place the steel pipes at the designated location, ensuring the steel plate overlaps with the marked position. The installation sequence is from the second basement level to the first basement level. The upper and lower steel pipe jacks 2 must be arranged on the same plane, with a center deviation of approximately 5cm. Placing jacks 2 to tighten the beams or slabs: Use a gantry crane as an aid. Manually place jacks 2 in the center and gently rock them until they are firmly against the floor slab. Then, rock them 5 times at full amplitude to ensure they are firmly against the floor slab. Removing the steel pipe jacks 2: The removal sequence is first the first basement level, then the second basement level. Before removal, have 2 people support the steel pipes, 1 person support the top steel plate, and then 1 person unload the load from jacks 2 to complete the removal.

[0041] This application introduces a multi-layered support structure for the roof slab pile foundation construction support platform, enhancing overall stability. The support column 1 serves as the main load-bearing component, with jacks 2 mounted on its top to support the basement roof slab 4. Jacks 2 not only increase the platform's height adjustment capability but also provide a certain degree of buffering capacity through their elastic support characteristics. The basement roof slab 4 bears a crucial load-bearing function, transferring the load to the support columns and jacks 2, avoiding the single path of direct load transfer to the foundation as in traditional platforms, thus reducing the risk of stress concentration. Steel beams 6 are fixed to the basement roof slab 4, forming the main load-bearing frame. The roadbed slab 7 is fixed to the upper end of the steel beams 6, forming the construction working surface. This multi-layered structure significantly improves the platform's overall rigidity and load-bearing capacity.

[0042] Meanwhile, the top slab pile foundation construction support platform of this application provides a flexible leveling mechanism to avoid stress concentration: the basement top slab 4 is supported by at least two sets of support columns 1 and jacks 2, which helps to disperse stress; at the same time, the jacks 2 are installed at the top of the support columns 1 and can be adjusted in height according to actual needs. This adjustment capability allows the platform to adapt to uneven settlement or inclined ground conditions, thereby achieving uniform load distribution; and a gravel filling area is set between the roadbed slab 7 and the basement top slab 4, and filled with a gravel layer 5. The gravel layer 5 has good buffering performance and can absorb part of the impact load, further dispersing stress.

[0043] Equally important, the top slab pile foundation construction support platform of this application can optimize the load distribution path and protect the underground structure. Compared with traditional construction platforms that mainly rely on rigid concrete cushion layers or use steel plates alone to distribute the load, the load of this application is transferred from the roadbed plate 7 to the steel beam 6 and the crushed stone layer 5, and then through the basement top slab 4 to the jack 2 and the support column 1, and finally to the basement floor slab 3. This multi-level transfer path significantly reduces the load concentration of individual components. Among them, the crushed stone layer 5 plays the role of stress buffering and dispersion, and the support column 1 can stably transfer the load to the basement floor slab 3, avoiding structural damage caused by unstable support.

[0044] Traditional construction platforms have a simple structure and are difficult to adapt to complex construction environments, such as underground environments. The top slab pile foundation construction support platform of this application significantly improves the adaptability of the platform through a modular structure: First, the total height of the support column 1 and the jack 2 is adjustable. The height of the support column 1 can be adjusted according to actual construction needs and is suitable for basement structures of different depths.

[0045] Finally, the top slab pile foundation construction support platform of this application comprehensively improves the platform's safety and reliability, enhances its overall rigidity, and the rational arrangement of the multi-layer support structure and steel beams 6 significantly improves the platform's overall rigidity, reducing the risk of structural deformation due to vibration or impact. The design of the crushed stone filling area and crushed stone layer 5 not only disperses the load but also plays a role in sound insulation and vibration reduction, further enhancing the platform's safety. It is easy to maintain and expand, as the support columns 1, steel beams 6, and roadbed plates 7 are all standardized components, facilitating on-site assembly and subsequent maintenance. At the same time, the platform design reserves expansion space to suit construction needs of different scales.

[0046] The slab pile foundation construction support platform also includes a shim 8, which is located between the steel beam 6 and the basement roof slab 4 to leave a gap at the bottom of the steel beam 6. In the slab pile foundation construction support platform, the shim 8, located between the steel beam 6 and the basement roof slab 4, is typically made of high-strength steel plate or composite materials to ensure sufficient load-bearing capacity and durability. The steel plate thickness is generally 5mm to 10mm, with the specific thickness determined according to actual load requirements. The shape of the shim 8 should match the contact surface of the steel beam 6, typically rectangular or strip-shaped. Its length and width should be slightly larger than the bottom dimensions of the steel beam 6 to ensure a sufficiently large contact area and avoid localized stress concentration. The shim 8 is placed directly on the upper surface of the basement roof slab 4 and contacts the bottom surface of the steel beam 6. During installation, it should be ensured that the surface of the shim 8 is flat, without obvious bumps or deformation, to guarantee the levelness and stability of the steel beam 6. The height of the shim 8 determines the size of the gap at the bottom of the steel beam 6. Generally, the clearance height is 50mm to 100mm to meet the operational needs of construction personnel or the space requirements for equipment installation. This design is particularly suitable for situations where secondary construction or equipment installation needs to be carried out at the bottom of the steel beam 6, such as pipe laying or cable arrangement.

[0047] In some embodiments, see Figure 1 As shown, a beam structure 40 is provided at the lower end of the basement roof slab 4 of the top slab pile foundation construction support platform. The beam structure 40 is supported by jacks 2. The beam structure 40 is usually a reinforced concrete beam or a steel structure beam. The beam structure 40 is arranged along the lower surface of the basement roof slab 4 and corresponds to the position of the support columns 1. Each support column 1 corresponds to one beam structure 40 to ensure a clear load transfer path. The jacks 2 act directly on the upper surface of the beam structure 40 and transfer the load to the basement floor slab 3 through the support columns 1. The number and position of the jacks 2 should match the design of the beam structure 40. The load is transferred from the basement roof slab 4 to the beam structure 40, then through the jacks 2 to the support columns 1, and finally to the basement floor slab 3. This design can effectively distribute the load and improve the stability of the overall structure.

[0048] Understandably, see Figure 1 As shown, jack 2 can also be directly supported on the lower surface of the basement roof slab 4.

[0049] In one embodiment of the aforementioned steel beam 6, see [reference needed]. Figure 2As shown, in the support platform for the top slab pile foundation construction, the steel beam 6 is an I-beam, with reinforcing ribs 60 on the outer side to improve its load-bearing capacity. The specific implementation is as follows: The I-beam 6 is typically made of hot-rolled steel of national standard specifications (such as Q345B), and its section height and flange width should be determined according to actual load requirements. The reinforcing ribs 60 are usually made of angle steel or steel plates and welded to the outer flange of the I-beam 6. The length of the reinforcing ribs 60 should cover the main stress area of ​​the I-beam 6. The reinforcing ribs 60 can significantly improve the bending and shear resistance of the I-beam 6, especially when subjected to large lateral loads. This structure is suitable for situations requiring the bearing of large lateral loads or dynamic loads, such as heavy machinery operations or frequent vehicle traffic.

[0050] To improve the overall structural stability and stress uniformity, refer to Figure 1 As shown, in the support platform for the top slab pile foundation construction, there are at least three steel beams 6, arranged in parallel and at equal intervals. The number of steel beams 6 should be determined based on the span and load requirements of the support platform. Generally, platforms with larger spans require more steel beams 6 to improve overall rigidity. The steel beams 6 are arranged parallel to the length of the basement roof slab 4, maintaining equal intervals. The distance between two adjacent steel beams 6 is generally 1m to 2m. Roadbed plates 7 are simultaneously placed on top of at least two steel beams 6 and fixed by connectors (such as bolts or welding). The length of the roadbed plate 7 should cover the upper surface of all steel beams 6. This arrangement makes it suitable for situations requiring a large load-bearing area, such as operating platforms for large machinery or temporary road paving.

[0051] For example, see Figure 1 As shown, the aforementioned steel beam 6 is fixed to the basement roof slab 4 with bolts. High-strength bolts (such as M20-M30) are typically selected, and their material should meet national standards (such as Q345B). The number and location of the bolts should be determined based on the length of the steel beam 6 and the load requirements. During the construction of the basement roof slab 4, steel plates or bolt sleeves should be pre-embedded at appropriate locations for subsequent installation of the steel beam 6. During installation, the steel beam 6 is placed on the basement roof slab 4, aligning with the bolt holes on the pre-embedded parts. Then, the steel beam 6 is fixed to the pre-embedded parts with bolts. Bolt tightening should be controlled using a torque wrench to ensure that the tightening torque meets design requirements. The tightening sequence should proceed gradually from the middle to both sides.

[0052] For example, see Figure 1 As shown, in the top slab pile foundation construction support platform, the bottom of the support column 1 is fixed to the basement floor slab 3 by bolts.

[0053] For example, the aforementioned roadbed slab 7 is composed of precast concrete slabs and is fixed to the steel beam 6 by connectors. The thickness of the precast concrete slab is generally 100mm to 150mm, and its length and width should be determined according to actual needs. The concrete strength grade should not be lower than C30. Connectors are usually made of angle steel, channel steel, or special connectors (such as U-shaped clips), and their material should meet national standard requirements (such as Q235B). During installation, the precast concrete slab is placed on the upper surface of the steel beam 6 and fixed by the connectors. The connectors should be evenly distributed around the perimeter of the precast concrete slab. During fixing, it should be ensured that the precast concrete slab is in close contact with the steel beam 6 and the two are firmly connected by the connectors. Welding or bolting can be used if necessary. This design is particularly suitable for scenarios requiring rapid construction or reusability, such as temporary road paving or operating platforms for large machinery.

[0054] See Figure 1As shown, in some embodiments, the slab pile foundation construction support platform also includes a pressure sensor 9 disposed between the jack 2 and the basement roof slab 4 for monitoring the pressure of the jack 2. It also includes a control system connected to the jack 2, which automatically adjusts the height of the jack 2 to maintain the pressure value within a preset range, achieving real-time monitoring and automatic adjustment of the jack 2 pressure. The pressure sensor 9 is installed on the contact surface between the jack 2 and the basement roof slab 4, typically embedded in the upper surface of the jack 2 or fixed to the lower surface of the basement roof slab 4. The sensor is in direct contact with the jack 2 and can accurately measure the pressure applied by the jack 2. The pressure sensor 9 can be a hydraulic or electronic sensor. Hydraulic sensors transmit pressure signals through hydraulic oil and are suitable for high-load scenarios; electronic sensors sense pressure changes through the Wheatstone bridge principle or strain gauges, offering higher sensitivity and response speed. The sensor transmits the pressure signal to the control system via cable or wireless communication module. For large construction sites, wireless transmission is recommended to reduce wiring complexity. For example, the control system mainly includes the following components: a data acquisition module: receiving signals from pressure sensor 9 and performing preliminary processing; a central processing unit (CPU): responsible for data analysis, calculation, and decision-making; an actuator: such as an electric motor or hydraulic pump, used to drive the height adjustment of jack 2; and a display screen and operating interface: allowing operators to view real-time data and system status. Data acquisition and storage: real-time acquisition and storage of pressure data for subsequent analysis. Automatic adjustment algorithm: based on a preset pressure range, automatically adjusting the height of jack 2 using a PID (proportional-integral-derivative) control algorithm. Alarm and prompt: issuing an alarm to prompt operator intervention when the pressure exceeds the preset range or when a system malfunction occurs. The system monitors the pressure value of jack 2 in real time and compares it with the preset target pressure range. When the pressure value is lower or higher than the target range, the system triggers the automatic adjustment program. The system adjusts the height of jack 2 by driving the telescopic rod of jack 2 (hydraulic jack 2 adjusts oil pressure via a hydraulic pump, electric jack 2 drives a lead screw via a motor). After adjustment, the system checks the pressure value again to ensure it is within the preset range. In scenarios with multiple supporting columns 1, the control system can coordinate the actions of multiple jacks 2 to ensure the platform remains level. This collaborative control function is particularly suitable for ground conditions with uneven settlement. By monitoring the pressure of jacks 2 in real time and automatically adjusting their height, the system effectively avoids the risk of structural instability caused by overload or underload. The automated control system reduces the need for manual adjustments, lowers labor intensity, and improves construction efficiency. The system can precisely control the pressure and height of jacks 2, ensuring the platform remains level at all times, thereby improving construction accuracy. By avoiding overload or underload operation, the system can extend the service life of jacks 2 and other components. The system can adapt to complex construction environments with uneven settlement or dynamic loads, significantly improving the platform's applicability and reliability.

[0055] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A support platform for top slab pile foundation construction, characterized in that, include: Support columns, jacks, basement floor slab, basement roof slab, crushed stone layer, steel beams and roadbed plates; The supporting columns and jacks are provided in at least two sets. In the same set of supporting columns and jacks, the bottom end of the supporting column is fixed to the basement floor slab as a supporting foundation, and the jack is installed at the top of the supporting column and is used to support the basement roof slab. The basement roof slab serves as the intermediate load-bearing structure. The steel beams are fixed to the upper end of the basement roof slab, forming the main load-bearing frame; The roadbed plate is fixed to the upper end of the steel beam, and a gravel filling area is formed between the roadbed plate and the basement roof slab on both sides of the steel beam. The crushed stone layer fills the crushed stone filling area.

2. The top slab pile foundation construction support platform according to claim 1, characterized in that, The top slab pile foundation construction support platform also includes a shim, which is located between the steel beam and the basement roof slab to leave the bottom of the steel beam empty.

3. The top slab pile foundation construction support platform according to claim 1, characterized in that, The lower end of the basement roof slab is provided with a beam structure, which is supported by the jacks.

4. The top slab pile foundation construction support platform according to claim 1, characterized in that, The steel beam is an I-beam, which includes reinforcing ribs on the outer side to improve its load-bearing capacity.

5. The top slab pile foundation construction support platform according to claim 1, characterized in that, The steel beams are provided in at least three and are arranged in parallel and at equal intervals. The roadbed plate is simultaneously set on the upper end of at least two of the steel beams.

6. The top slab pile foundation construction support platform according to claim 1, characterized in that, The steel beams are fixed to the basement roof slab with bolts.

7. The top slab pile foundation construction support platform according to claim 1, characterized in that, The bottom of the supporting column is fixed to the basement floor slab with bolts.

8. The top slab pile foundation construction support platform according to claim 1, characterized in that, The roadbed plate is composed of precast concrete slabs and is fixed to the steel beams by connectors.

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