Pi-shaped steel-concrete composite beam poured by micro paver

Abstract

The utility model provides a miniature paver poured pi-shaped steel-concrete composite beam which comprises bottom layer concrete, top layer concrete and a support, the top layer concrete is poured and paved through a miniature paver, and the top layer concrete is high in the middle and low in the two sides in the transverse direction; stand columns are evenly arranged on the upper portion of the support at intervals, longitudinal beams are arranged on the stand columns, the middle of each longitudinal beam is higher than the two sides, and rail grooves are formed in the tops of the longitudinal beams. According to the utility model, errors caused by manual operation are avoided, the construction efficiency is improved, and the gradient quality of the bridge deck slab is ensured.

Description

Technical Field

[0001] This utility model relates to the field of concrete pouring construction of π-shaped steel-concrete composite beams, and particularly to the pouring of π-shaped steel-concrete composite beams using a mini paver. Background Technology

[0002] Steel structures and concrete structures are the two most commonly used structures in civil engineering, and steel-concrete composite structures are developed based on these two structures. Steel-concrete composite structures can fully utilize the characteristics of steel and concrete, taking full advantage of the excellent tensile strength of steel and the good compressive strength of concrete, and combining the advantages of both steel and concrete structures in terms of mechanical properties, construction performance, and economy. The π-shaped steel-concrete composite beam consists of two I-beams, a central crossbeam, and a concrete bridge deck. Due to site requirements, the π-shaped steel-concrete composite beam bridge deck is often made with a certain slope in both the longitudinal and transverse directions. Traditional casting processes present the following problems:

[0003] (1) The π-type steel-concrete composite beam bridge deck is directly poured using a large-volume hopper, and then smoothed manually. The manual smoothing and finishing process is inefficient. (2) Because the designed π-type steel-concrete composite beam has a certain slope in both the longitudinal and transverse directions, the manual finishing process cannot accurately meet the slope requirements, resulting in large errors and difficulty in ensuring quality. Utility Model Content

[0004] The purpose of this utility model is to provide a micro paver for casting π-shaped steel-concrete composite beams to solve the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, this utility model provides a micro paver for casting a π-shaped steel-concrete composite beam, including a bottom layer of concrete, a top layer of concrete, and a support. The top layer of concrete is cast and laid by the micro paver, and the top layer of concrete is higher in the middle and lower on both sides in the transverse direction. The support has columns evenly spaced on the upper part, and longitudinal beams are set on the columns. The longitudinal beams are higher in the middle and lower on both sides, and a track groove is set on the top of the longitudinal beams.

[0006] Furthermore, it also includes a frame beam with a slope that is higher in the middle and lower on both sides. Drive motors are installed on both sides of the frame beam, and steel wheels are installed at the bottom of both sides of the frame beam. The steel wheels are connected to the drive motors through a coupling shaft. The steel wheels are embedded in the track grooves at the top of the longitudinal beams. Under the drive of the drive motors, the steel wheels move longitudinally along the track grooves to drive the entire frame beam to move longitudinally.

[0007] Furthermore, a transverse track is provided on the frame beam, and the wheels of the mini paver are embedded in the transverse track. The mini paver can move laterally along the transverse track. The lower part of the mini paver has a telescopic frame rod, which passes through the central cavity of the frame beam and is connected to the vibrating scraper. The top layer of concrete is leveled by the vibrating scraper to maintain the slope.

[0008] Furthermore, the top layer concrete has a slope of 2% and a pouring thickness of 5-15cm.

[0009] Furthermore, the longitudinal slope of the longitudinal beam is set with a pre-camber of 50mm at mid-span.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. The π-shaped steel-concrete composite beam bridge deck is constructed in two layers. First, a large-volume hopper is used to pour the bottom layer of concrete, and then a mini paver is used to pour the top layer of concrete. The mini paver pours and smooths the concrete at the same time. After smoothing each section, it moves longitudinally and then smooths the next section. This cyclical construction improves construction efficiency and ensures the quality of the bridge deck slope.

[0012] 2. By presetting the camber of the longitudinal beams and the slope of the transverse beams, the mini paver moves along the transverse beams, and the transverse beams move along the longitudinal beams as a whole. The longitudinal and transverse slopes of the bridge deck concrete are controlled by the camber of the longitudinal beams and the slope of the transverse beams, thus avoiding errors caused by human operation. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the layered pouring and paving of concrete for the deck of a π-shaped steel-concrete composite beam bridge, which is a utility model.

[0014] Figure 2 This is an enlarged view of the connection between the steel wheel at the end of the frame beam and the track groove of the longitudinal beam in this utility model.

[0015] Figure 3 This is a diagram showing the longitudinal segmented pouring and paving of the top layer concrete of the π-shaped steel-concrete composite beam bridge deck of this utility model.

[0016] Figure 4 This is a partially enlarged view of the longitudinal segmented pouring and paving of the top layer concrete of the π-shaped steel-concrete composite beam bridge deck of this utility model. Figure 3 (Enlarged view of a specific area);

[0017] Figure 5 This is a plan view of the frame beam of this utility model - a mini paver;

[0018] Figure 6 This is a three-dimensional structural diagram of the frame beam of this utility model - a mini paver;

[0019] Figure 7This is an enlarged view of the structural details of the end of the frame beam of this utility model;

[0020] Figure 8 This is a partially enlarged view of the connection between the frame beam and the mini paver of this utility model;

[0021] Among them: 1-Steel main beam; 2-Beam fabrication platform; 3-Jack; 4-Support; 5-π beam bottom formwork; 6-Side formwork; 7-Column; 8-Longitudinal beam; 9-Track groove; 10-Drive motor; 11-Steel wheel; 12-Frame crossbeam; 13-Bottom layer concrete; 14-Top layer concrete; 15-Mini paver; 16-Telescopic frame pole; 17-Vibrating scraper; 18-Coupling shaft; 19-Transverse track; 20-Paver wheel. Detailed Implementation

[0022] 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, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "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. They are only for the convenience of describing this utility model and simplifying the description, and 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0025] like Figures 1-8 As described above, this utility model provides a method for casting π-shaped steel-concrete composite beams using a miniature paver, such as... Figure 1The diagram shows the layered concrete pouring and paving structure of the π-shaped steel-concrete composite beam bridge deck, including the bottom layer concrete 13, the top layer concrete 14, and a mini paver 15. The π-shaped steel-concrete composite beam is poured in layers. First, a large volume of the bottom layer concrete 13 is poured using a large-volume hopper. Then, a small volume of the top layer concrete 14 is poured using a mini paver 15. The top layer concrete 14 has a lateral slope of 2%, which is higher in the middle and lower on both sides. The thickness of the top layer concrete 14 is 5-15 cm.

[0026] like Figure 2-4 The diagram shows the longitudinal segmented pouring and paving of the top layer concrete of the π-shaped steel-concrete composite beam bridge deck, including supports 4, columns 7, longitudinal beams 8, and track grooves 9. The supports 4 have columns 7 welded at uniform intervals on the upper part, and the longitudinal beams 8 are welded on the columns 7. The longitudinal beams 8 are higher in the middle and lower on both sides, and the longitudinal slope at the mid-span is set with a pre-camber of 50mm. The longitudinal slope of the longitudinal beams 8 depends on the length. Track grooves 9 are set on the top of the longitudinal beams 8.

[0027] like Figure 5-7 The diagram shows a frame beam-micro paver structure, including a longitudinal beam 8, a track groove 9, a drive motor 10, steel wheels 11, a frame beam 12, a connecting shaft 18, a transverse track 19, and wheels 20. The frame beam 12 is an integral, standardized frame structure with a slope of 2% (higher in the middle and lower on both sides). Drive motors 10 are installed on both sides of the frame beam 12, and steel wheels 11 are installed at the bottom of both sides of the frame beam 12. The steel wheels 11 are connected to the drive motors 10 via the connecting shaft 18. The steel wheels 11 are embedded in the track groove 9 at the top of the longitudinal beam 8. Under the drive of the drive motor 10, the steel wheels 11 move longitudinally along the track groove 9 at the top of the longitudinal beam 8, thus driving the entire frame beam 12 to move longitudinally.

[0028] like Figure 8 The enlarged view of the connection between the frame beam and the mini paver shown includes the frame beam 12, top concrete layer 14, mini paver 15, telescopic frame 16, vibratory scraper 17, lateral track 19, and wheels 20. The lateral track 19 is installed on the frame beam 12. The wheels 20 of the mini paver 15 are embedded in the lateral track 19, allowing the mini paver 15 to move laterally along the lateral track 19. The telescopic frame 16 at the bottom of the mini paver 15 passes through the central cavity of the frame beam 12 and connects to the vibratory scraper 17. The top concrete layer 14 is leveled by the vibratory scraper 17 to maintain the slope.

[0029] like Figure 1 , 3The diagram shows the layered concrete pouring and paving structure of the π-shaped steel-concrete composite beam bridge deck, including longitudinal beams 8, frame beams 12, and top concrete 14. Due to the 50mm pre-camber set at the mid-span of the longitudinal slope of longitudinal beam 8, the top concrete 14 is 50mm higher at the mid-span than on both sides. Due to the 2% transverse slope of frame beam 12, the top concrete 14 has a 2% transverse slope.

[0030] This plan can be implemented according to the following steps:

[0031] Step 1, Preliminary Construction: Cast the beam-making platform 2 according to the design position. In advance, process and manufacture the steel main beam 1, longitudinal beam 8, and frame crossbeam 12 in the factory. The frame crossbeam 12 is processed as a whole, with the middle being higher and the two sides lower. The transverse slope of the frame crossbeam 12 is set to 2%. On the construction site, weld and assemble the steel main beam 1 on the beam-making platform 2. Weld multiple sets of shear nails on the top of the steel main beam 1. Erect the support 4 according to the design height and position. Lay the π beam bottom formwork 5 on the steel main beam 1 and the support 4 in sequence, and support the side formwork 6.

[0032] Step 2, Column Installation: Weld columns 7 at even intervals on the upper part of the bracket 4. The length of the columns 7 is determined according to the longitudinal length of the π-shaped steel-concrete composite beam. The length of the columns 7 at both ends of the longitudinal direction is shorter than the length of the columns 7 at the middle position of the longitudinal direction. The length of several columns 7 increases or decreases sequentially along the longitudinal direction. The columns 7 at the middle position of the longitudinal direction are 50mm longer than the columns 7 at both ends of the longitudinal direction. The even interval between adjacent columns 7 is 1.5-2m. Diagonal bracing is installed between adjacent columns 7 for reinforcement.

[0033] Step 3, longitudinal beam installation: Weld the pre-fabricated longitudinal beams 8 to the top of several columns 7. The top of the longitudinal beams 8 is equipped with track grooves 9. The longitudinal beams 8 have a slope that is higher in the middle and lower at both ends in the longitudinal direction. The longitudinal beams 8 are set with a pre-camber of 50mm at the mid-span.

[0034] Step 4, Frame beam installation: Install steel wheels 11 on the bottom of both sides of the integral frame beam 12, and install a fixed drive motor 10 at the end of the frame beam 12. Connect the steel wheels 11 and the drive motor 10 through the coupling 18. Check whether the drive motor 10 can drive the steel wheels 11 to rotate normally. After the test is correct, hoist the frame beam 12 as a whole to the top of the longitudinal beam 8, and embed the steel wheels 11 into the track groove 9.

[0035] Step 5: Install the mini paver: Hoist the mini paver 15 onto the frame beam 12, embed the wheels 20 into the transverse track 19 at the top of the frame beam 12, and after the telescopic frame rod 16 passes through the cavity in the middle of the frame beam 12, install the vibratory scraper 17 at the lower part of the telescopic frame rod 16. Check whether the mini paver 15 can move laterally on the frame beam 12 normally, and re-measure whether the transverse slope of the frame beam 12 is 2%.

[0036] Step 6, Bottom Concrete Pouring: Tie the reinforcing bars of the π-shaped steel-concrete composite beam. The beam reinforcing bars must be staggered from the shear studs. The two can be welded. Set up a large-volume hopper and pour the bottom concrete 13 through the large-volume hopper. The pouring height of the bottom concrete 13 should be 15cm above the designed concrete bridge deck height.

[0037] Step 7, Top layer concrete pouring: After the bottom layer concrete 13 is poured, quickly remove the large volume hopper within 15 minutes and pour the top layer concrete 14 using the mini paver 15. While pouring the concrete, the mini paver 15 uses the vibrating scraper 17 to level it. The mini paver 15 moves laterally along the frame beam 12 to keep the horizontal leveling slope of the top layer concrete 14 at 2%.

[0038] Step 8: Longitudinal movement of the frame beam: After completing the top layer concrete 14 of a section, start the drive motor 10 to make the entire frame beam 12 drive the mini paver 15 to move longitudinally along the longitudinal beam 8. After moving to the next section, the mini paver 15 pours and paves the top layer concrete 14 according to the same process as in Step 7.

[0039] Step 9, Cyclic Construction: Continue construction in the same cycle as in Step 8. Move the entire frame beam 12 from one end of the longitudinal beam 8 to the other end, causing the top concrete 14 to arch at the mid-span position in the longitudinal direction, with an arch height of 50mm.

[0040] Step 10, Concrete Curing: After the top layer concrete 14 is poured, the frame beam 12 and the mini paver 15 are lifted and moved as a whole. The concrete surface is covered with a protective film and water is sprinkled for curing, thus completing the concrete pouring construction of a π-shaped steel-concrete composite beam.

[0041] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A method for casting a π-shaped steel-concrete composite beam using a miniature paver, characterized in that: It includes a bottom layer of concrete (13), a top layer of concrete (14), and a support (4). The top layer of concrete (14) is poured and spread by a micro paver (15). The top layer of concrete (14) is higher in the middle and lower on both sides in the horizontal direction. The support (4) has columns (7) evenly spaced on the upper part. The columns (7) are equipped with longitudinal beams (8). The longitudinal beams (8) are higher in the middle and lower on both sides. The top of the longitudinal beams (8) is equipped with a track groove (9). It also includes a frame beam (12), which has a slope that is high in the middle and low on both sides. A drive motor (10) is provided on both sides of the frame beam (12), and steel wheels (11) are provided at the bottom of both sides of the frame beam (12). The steel wheels (11) are connected to the drive motor (10) through a coupling (18). The steel wheels (11) are embedded in the track groove (9) at the top of the longitudinal beam (8). Under the drive of the drive motor (10), the steel wheels (11) move longitudinally along the track groove (9) to drive the entire frame beam (12) to move longitudinally.

2. The micro-paver casting π-shaped steel-concrete composite beam according to claim 1, characterized in that: A transverse track (19) is provided on the frame beam (12). The wheels (20) of the micro paver (15) are embedded in the transverse track (19). The micro paver (15) can move laterally along the transverse track (19). The micro paver (15) has a telescopic frame rod (16) at the bottom. The telescopic frame rod (16) passes through the middle cavity of the frame beam (12) and is connected to the vibrating scraper (17). The top layer concrete (14) is leveled by the vibrating scraper (17) to maintain the slope.

3. The micro paver casting π-shaped steel-concrete composite beam according to claim 1, characterized in that: The slope of the top concrete (14) is 2%, and the thickness of the top concrete (14) is 5-15cm.

4. The π-shaped steel-concrete composite beam cast by a miniature paver according to claim 1, characterized in that: The longitudinal slope of the longitudinal beam (8) is set to a pre-camber of 50mm at mid-span.

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