Construction method of steel-concrete composite u-shaped beam

Abstract

The present application relates to a kind of construction methods of steel concrete composite U-shaped beam, steel concrete composite U-shaped beam section is integrally formed by web and wing plate in prefabricated way, the first section of web is provided with three positioning pins according to triangular distribution and protruding first section, the second section of web is provided with three positioning holes according to triangular distribution, in the case where the first section of one web is spliced with the second section of another web, the position and size of positioning pin and positioning hole match each other, wherein, in the case where infrared radiation, positioning pin is used as first mark position to determine the inclination angle and / or position of first section, positioning hole is used as second mark position to determine the inclination angle and / or position of second section.For the problem of low splicing efficiency in the prior art, the present application improves the construction method of the structure of the section of steel concrete composite U-shaped beam section, reduces the difficulty of leveling at splicing, improves leveling efficiency.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a construction method for a steel-concrete composite U-shaped beam. Background Technology

[0002] Steel-concrete composite U-beams are a commonly used structural component, combining the advantages of reinforced concrete and steel. Shaped like a "U," they possess high stiffness and strength, enabling them to withstand large loads. The structure of the steel-concrete composite U-beam reduces its self-weight while increasing its load-bearing capacity. This structural form allows U-beams to exhibit excellent performance in multiple directions, including shear force, bending moment, and torque.

[0003] The manufacturing process of steel-concrete composite U-beams involves first fabricating the bottom and side plates of the U-shaped section using steel plates, then embedding a steel reinforcement cage within them, and finally filling the space with concrete. This combination allows the steel reinforcement and concrete to work together, giving the beam the tensile strength of the steel and the compressive strength of the concrete. This significantly improves the strength and stiffness of the U-beam, better meeting the load-bearing capacity requirements of engineering projects.

[0004] Traditional construction methods for steel-concrete composite U-beams require on-site concrete pouring, a cumbersome and time-consuming process. Currently, prefabrication technology allows the production of steel-concrete composite U-beams to be moved to a factory, manufactured in a controlled environment, effectively shortening the construction cycle and improving quality stability. Because prefabrication fully utilizes advanced equipment and precision molds, the manufacturing accuracy of steel-concrete composite U-beams is greatly improved. The precision of the molds ensures the consistency of the product's dimensions and shape, effectively reducing the need for on-site adjustments and repairs. This highly refined manufacturing process achieves standardization and large-scale production of components, not only improving engineering feasibility but also reducing project costs. The prefabricated steel-concrete composite U-beams need to be assembled on-site.

[0005] Currently, the technical drawbacks of assembling precast steel-concrete composite U-beams include: During hoisting, the large weight of the U-beams, resulting in significant inertia, makes them prone to noticeable tilting even with slight angle changes, making fine adjustments difficult. The alignment of the beam joints during assembly is time-consuming and prone to unevenness, with protrusions or jagged edges. These uneven structures are detrimental to the normal operation of the steel-concrete composite U-beams. The splicing method is particularly limited in windy, rainy, and unstable weather conditions. Furthermore, when the span of the steel-concrete composite U-beam reaches a certain distance, the limited number of hoisting points restricts the crane's capacity and reach. Therefore, the suspension splicing method for U-beams is now widely used. In this method, a suspension frame is needed to support the weight of the U-beam, requiring precise control of the position and angle of each component. Advanced measurement and precise positioning technologies are necessary to ensure the accuracy and stability of the assembly.

[0006] Therefore, how to modify the structure of steel-concrete composite U-beams to reduce the difficulty of splicing two steel-concrete composite U-beams is a technical problem that needs to be further solved.

[0007] Patent application CN113356014A discloses a UHPC (Ultra-High-Pressure Polymer) pedestrian bridge U-shaped beam without web reinforcement and its construction method. The U-shaped beam includes a UHPC base plate and two UHPC webs located at both ends of the base plate. The two webs and the base plate are connected to form a U-shape. Prestressed steel strands are arranged at the upper and lower ends of the webs along the longitudinal direction of the bridge. No stirrups are required in the webs, and multiple ventilation holes are provided. However, this UHPC pedestrian bridge U-shaped beam without web reinforcement is lightweight and thin, thus avoiding the alignment difficulties during splicing. For steel-concrete composite U-shaped beams of heavier bridges, this splicing structure, due to its large load-bearing capacity, cannot solve the problem of significant splicing difficulties.

[0008] This invention aims to simplify the splicing steps and reduce the difficulty of splicing steel-concrete composite U-shaped beams by improving the structure of the steel-concrete composite U-shaped beams and the positioning method during the splicing process.

[0009] Furthermore, on the one hand, there are differences in understanding among those skilled in the art; on the other hand, the applicant studied a large number of documents and patents when making this invention, but due to space limitations, not all details and contents were listed in detail. However, this does not mean that the present invention does not possess the features of these prior art. On the contrary, the present invention already possesses all the features of the prior art, and the applicant reserves the right to add relevant prior art to the background art. Summary of the Invention

[0010] In existing steel-concrete composite U-beam technologies, the segments are first fixed by fixing components and then grouted together. This method has several drawbacks: the segments are not leveled, resulting in height or angular deviations. This leads to inconsistent stress directions at the joints, reducing the compressive and load-bearing capacity of the steel-concrete composite U-beam and making the joints more prone to fracture, ultimately shortening the overall lifespan of the bridge.

[0011] To improve the positioning and connection efficiency of prefabricated building structures, existing technologies have developed solutions for the rapid positioning and connection of different plates by using matching concave-convex connection structures. For example, patent document CN213539883U discloses a rapid positioning and connection structure for prefabricated building steel plates, including a steel plate body with a first boss fixedly connected to one side, a first threaded hole on one side of the first boss, a first positioning post fixedly connected to one side of the first boss, a first fixing post fixedly connected to the top of one side of the first boss, and a second boss fixedly connected to the upper surface of the steel plate body, with a second threaded hole on one side of the second boss. This rapid positioning and connection structure for prefabricated building steel plates allows two steel plates to be nested and fixed through the cooperation of the first boss and the first fixing plate. Simultaneously, the cooperation of the first positioning post, the first fixing post, the first nut, the first positioning groove, the first fixing hole, and the first threaded hole allows for the rapid positioning, connection, and fixation of one side of the two steel plates, thereby effectively enhancing work efficiency. However, the prefabricated structure involved in this technical solution is limited to lightweight building wall structures. This type of prefabricated structure can be easily positioned using lifting devices, thus enabling efficient adjustment of the assembly position. Even if there are differences in the initial assembly alignment, they can still be easily adjusted using lifting devices without significantly affecting the assembly efficiency. In contrast, this invention targets prefabricated reinforced concrete bridge structures with relatively large mass. Therefore, it is necessary to determine whether the assembly position is aligned before formal assembly. If differences in the assembly position occur when the assembly mating surfaces come into contact or when the positioning connecting parts are partially connected, adjusting the mating position at this time will significantly increase the workload of re-alignment correction and also pose a risk of damaging the already connected positioning connecting parts due to the position adjustment.

[0012] To address the shortcomings of existing technologies, this invention provides a steel-concrete composite U-beam and its construction method. The steel-concrete composite U-beam has a simple structure, which reduces construction difficulty and makes it easier to level the two steel-concrete composite U-beam segments.

[0013] The present invention discloses a steel-concrete composite U-shaped beam, which is integrally formed by prefabrication of a web and flanges. The flanges are disposed on both sides of the web. The first section of the web is provided with at least three positioning pins distributed in a triangular pattern and protruding from the first section. The second section of the web is provided with at least three positioning holes distributed in a triangular pattern. When the first section of one web is spliced ​​with the second section of another web, the positions and dimensions of the positioning pins and positioning holes are matched with each other. Under infrared irradiation, the positioning pins are used as first marker positions to determine the inclination angle and / or position of the first section, and the positioning holes are used as second marker positions to determine the inclination angle and / or position of the second section.

[0014] Unlike existing technologies, the steel-concrete composite U-beams of this invention feature positioning structures on the intersecting web structures, each with matching positions and dimensions. These positioning structures can serve as references for adjusting the intersecting positions of different webs under infrared illumination. Based on these distinguishing technical features, the problems this invention aims to solve include: how to achieve rapid leveling and installation positioning of adjacent steel-concrete composite U-beams while improving the structural strength of the assembled steel-concrete composite U-beams. Specifically, this invention arranges the positioning pins and positioning holes in a triangular pattern, which facilitates determining the inclination of the web sections within the steel-concrete composite U-beam segments, making it easier to level the segments and align and adjust two segments to the same plane. This ensures that when the steel-concrete composite U-beam is under stress, the stress directions of the two segments are consistent, improving the compressive strength and load-bearing capacity of the steel-concrete composite U-beams and extending the overall lifespan of the bridge. Through the above-described configuration, this invention enables the construction of a stable triangular connection and support structure between the assembled steel-concrete composite U-beam segments. This structure is designed to bear the load differences between adjacent steel-concrete composite U-beam segments, particularly important when vehicles travel on bridges constructed of steel-concrete composite U-beams. Due to the time difference in load application between adjacent segments, they are subjected to asynchronous longitudinal impacts. Frequent load application can lead to gradually widening gaps and damage to the connection structure. Conversely, this invention utilizes the positioning structure, which serves as a leveling element during assembly, as a load-bearing component between adjacent steel-concrete composite U-beam segments after installation. This mitigates the impact of vehicles traveling on the bridge on the connection points of the steel-concrete composite U-beams, thereby improving the overall strength and stability of the prefabricated bridge structure.

[0015] According to a preferred embodiment, the locating pins include a first locating pin, a second locating pin, and a third locating pin. The distances between the first and third locating pins and the second locating pin are equal, thus forming an isosceles triangle for determining the inclination angle of the first cross-section. Unlike existing technologies, the first cross-section of the steel-concrete composite U-beam segment of this invention is provided with a locating pin structure that forms an isosceles triangle with each other. Based on the aforementioned distinguishing technical features, the problem to be solved by this invention can include: how to improve the load-bearing capacity and stability of the locating structure during assembly. Specifically, arranging the three locating pins in an isosceles triangle not only allows the locating pins to withstand pressure at different heights to disperse the pressure at the joint, but also prevents the first and second cross-sections from deflecting or rotating when they come into contact with each other. Preferably, the angle of the isosceles triangle formed by the first, second, and third locating pins with the second locating pin as the vertex is an obtuse angle; the smaller this obtuse angle, the higher the load-bearing capacity of the triangle. In other words, the present invention can improve the accuracy and installation efficiency of steel-concrete composite U-beam segment assembly by setting a positioning structure, and can also improve the load-bearing capacity and strength of the prefabricated composite structure after installation, thereby further improving its service life.

[0016] According to a preferred embodiment, the positioning holes include a first positioning hole, a second positioning hole, and a third positioning hole. The first positioning hole has a first grouting hole communicating with it in the vertical direction. The second positioning hole has a second grouting hole communicating with it in the vertical direction. The third positioning hole has a third grouting hole communicating with it in the vertical direction. A lifting hole is provided on the top plane of the web near the first section. Under infrared irradiation, when the first plane formed by the lifting hole, the first grouting hole, and the second grouting hole is perpendicular to the third plane containing the isosceles triangle of the first section of the web, it indicates that the planes of the two webs are leveled.

[0017] Unlike existing technologies, this invention enables the leveling of the web plane during hoisting via designated hoisting holes. It also allows for positional comparison of planes composed of different structures based on infrared illumination, thereby determining the alignment and leveling status of different webs. Based on these distinguishing features, the problem this invention aims to solve includes: how to determine whether the plane between two adjacent webs is leveled during hoisting. Specifically, this invention utilizes the unique plane formed by triangles to determine the coordinate parameters of a first plane formed by the marker positions of different planes. This allows for quick and simple determination of whether two steel-concrete composite U-beam segments are leveled, simplifying the processor's judgment steps.

[0018] According to a preferred embodiment, under infrared illumination, when the first plane formed by the hoisting hole, the first grouting hole, and the second grouting hole is on the same plane as the second plane formed by the third grouting hole, the first grouting hole, and the second grouting hole, or when the angle difference between the first plane and the second plane is less than a preset angle threshold, it indicates that the planes of the two webs are leveled. Based on the above distinguishing technical features, the problem to be solved by the present invention may include: how to improve the efficiency of plane leveling between two adjacent webs. Specifically, the present invention simplifies the planes of two steel-concrete composite U-beam segments into two tiny first and second planes, which not only simplifies the amount of data calculation but also accurately determines whether the two steel-concrete composite U-beam segments are leveled.

[0019] According to a preferred embodiment, the first and third locating pins are respectively positioned near the wing plate, and the second locating pin is positioned near the bottom surface of the first cross-section of the web plate. Furthermore, the second locating pin is not collinear with the first and third locating pins, thereby preventing the first cross-section of one web plate and the second cross-section of the other web plate from being vertically inclined relative to each other. This arrangement of the three locating pins in the present invention disperses the overall pressure at the joint to the locating pins at different heights and horizontal positions. Simultaneously, the area within the triangle formed by the three locating pins is less prone to deformation under pressure due to the bearing capacity of the three pins.

[0020] The construction method of the steel-concrete composite U-beam of the present invention includes the following steps: when two webs are spliced, infrared light is used to irradiate a first cross-section of one web and a second cross-section of the other web respectively; the first mark position of the positioning pin in the first cross-section is determined based on the image of the first cross-section and / or infrared reflection parameters; the second mark position of the positioning hole in the second cross-section is determined based on the image of the second cross-section and / or infrared reflection parameters; the inclination angle and / or position of the first cross-section is determined according to the first mark position; the inclination angle and / or position of the second cross-section is determined according to the second mark position; when the first cross-section and the second cross-section coincide, it is determined that the two webs are leveled; wherein, at least three positioning pins are distributed in a triangular pattern on the first cross-section of the web, and at least three positioning holes are distributed in a triangular pattern on the second cross-section of the web, and the positions and dimensions of the positioning pins and positioning holes are matched with each other.

[0021] The construction method of the present invention has simple implementation steps, low computational load of the processor and simple calculation steps, and short calculation time. It can provide construction personnel with rapid data or graphic feedback. At the same time, it is more accurate in judging whether each surface of the splicing meets the standard. Therefore, the construction method of the present invention reduces the implementation difficulty during splicing, and has good leveling effect and high construction efficiency.

[0022] According to a preferred embodiment, the construction method further includes: determining the inclination angle of the first section based on the isosceles triangle formed by the first, second, and third positioning pins; the distances between the first and third positioning pins and the second positioning pin are equal. The positioning pins of the present invention are arranged in an isosceles triangle, which enables uniform force distribution on both sides of the web and reduces the degree of deformation within the isosceles triangle region. Simultaneously, the triangular arrangement of the positioning pins makes it easier to accurately position the first and second sections, and also reduces the difficulty of accurately bringing the two sections close together.

[0023] According to a preferred embodiment, the construction method further includes the following steps: under infrared irradiation, when the first plane formed by the lifting hole, the first grouting hole, and the second grouting hole is perpendicular to the third plane containing the isosceles triangle of the first section of the web, the plane of the two webs is determined to be leveled; wherein, the first grouting hole is set vertically and communicates with the first positioning hole; the second grouting hole is set vertically and communicates with the second positioning hole; the third grouting hole is set vertically and communicates with the third positioning hole; the lifting hole is set on the top plane of the web near the first section. This construction method makes it easier to calculate the parameters of the first and third planes, thus making it easier to determine whether each steel-concrete composite U-beam segment is adjusted to the designated position, and also makes it easier to control the crane to adjust the steel-concrete composite U-beam segment to the designated position, thus improving the efficiency of adjusting the position of the steel-concrete composite U-beam segment.

[0024] According to a preferred embodiment, the construction method further includes: under infrared irradiation, when the first plane formed by the hoisting hole, the first grouting hole, and the second grouting hole is on the same plane as the second plane formed by the third grouting hole, the first grouting hole, and the second grouting hole, or when the angle difference between the first plane and the second plane is less than a preset angle threshold, determining that the planes of the two webs are leveled. This invention determines whether the two planes are leveled based on the parameters of the first and second planes, requiring less data calculation and reducing the difficulty of judgment. Furthermore, parameter-based adjustments make it easier to adjust steel-concrete composite U-beam segments to a specified angle or position in one go, significantly reducing the difficulty of adjustment and minimizing the need for repeated leveling steps during splicing.

[0025] According to a preferred embodiment, the positioning pin includes a first positioning pin, a second positioning pin, and a third positioning pin. The first positioning pin and the third positioning pin are respectively located near the wing plate, and the second positioning pin is located near the bottom surface of the first section of the web plate. The second positioning pin is not on the same straight line as the first positioning pin and the third positioning pin, thereby preventing the first section of one web plate and the second section of the other web plate from being tilted relative to each other in the vertical direction.

[0026] The construction method of the present invention can distribute the overall pressure at the splice to the positioning pins at different heights and horizontal positions. At the same time, the area within the triangle formed by the three positioning pins is not easily deformed due to pressure because of the pressure-bearing effect of the three positioning pins. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the first cross-section of the steel-concrete composite U-shaped beam segment provided by the present invention; Figure 2 This is a schematic diagram of the second cross-section of the steel-concrete composite U-shaped beam segment provided by the present invention; Figure 3 This is a planar distribution diagram of the grouting hole locations for a steel-concrete composite U-shaped beam segment provided by the present invention; Figure 4 This is a schematic diagram of the distribution of positioning pins in the steel-concrete composite U-shaped beam segment provided by the present invention; Figure 5 This is a schematic diagram of the distribution of positioning holes in the steel-concrete composite U-shaped beam segment provided by the present invention; Figure 6 This is a schematic diagram of the construction steps of the steel-concrete composite U-shaped beam provided by the present invention.

[0028] List of reference numerals 100: Steel-concrete composite U-beam segment; 110: Web plate; 111: First positioning pin; 112: Second positioning pin; 113: Third positioning pin; 114: Lifting hole; 120: Flange plate; 121: First positioning hole; 122: Second positioning hole; 123: Third positioning hole; 124: Third grouting hole; 125: First grouting hole; 126: Second grouting hole. Detailed Implementation

[0029] The following is a detailed description with reference to the accompanying drawings.

[0030] Example 1 Existing steel-concrete composite U-beams consist of several steel-concrete composite U-beam segments 100. The splicing process involves: positioning and slowly settling the precast steel-concrete composite U-beam segments 100 from high to low; then temporarily leveling and fixing them using metal connecting devices; and finally, pouring grout into the splice joint to connect the two segments 100. The drawback of this construction method is that it is difficult to level the joint between the two steel-concrete composite U-beam segments 100, and due to the large mass of each segment, it is difficult to readjust its height. Therefore, grouting is used to smooth the height difference at the joint. However, although grouting can smooth the height difference at the joint, the existing height difference causes a deviation in the stress distribution between the two steel-concrete composite U-beam segments 100 at the joint, resulting in poor bearing capacity and a tendency for cracks to appear. Furthermore, when implementing the current construction process, construction workers need to move the steel-concrete composite U-beam segment 100 slowly when operating the crane. This is because the steel-concrete composite U-beam segment 100 has a large inertia, making it difficult to quickly adjust it to a designated position or move it to a specified angle. Therefore, how to enable the crane to accurately position the steel-concrete composite U-beam segment 100 through parameter calculations and to quickly determine whether the joints of the steel-concrete composite U-beam segment 100 are leveled is a currently overlooked and unresolved problem.

[0031] To address the shortcomings of existing technologies, this invention provides a steel-concrete composite U-beam and its construction method. The steel-concrete composite U-beam has a simple structure, reducing construction difficulty and making it easier to level two steel-concrete composite U-beam segments 100. This invention can also provide a splicing monitoring system for steel-concrete composite U-beams, or a splicing system for steel-concrete composite U-beams, for controlling a crane to perform splicing tasks on the steel-concrete composite U-beam segments 100 provided by this invention, thereby improving splicing efficiency and reducing splicing difficulty.

[0032] This invention discloses a steel-concrete composite U-beam, comprising a web 110 and flanges 120 integrally formed in a prefabricated manner to create a steel-concrete composite U-beam segment 100. The web 110 serves as the transverse main plate of the steel-concrete composite U-beam segment 100. The flanges 120 serve as the longitudinal main plates. Figure 1 and Figure 2 As shown, the wing plates 120 are disposed on both sides of the web plate 110 in a longitudinal manner. The wing plates 120 are plates with curved surfaces. Preferably, the curved surfaces of the two wing plates 120 are arranged opposite to each other, so that the two wing plates 120 and the web plate 110 form a U-shaped structure.

[0033] The web 110 has cross-sections at both ends, specifically transverse sections. The section of the web 110 with the locating pin is the first section. The locating pin is used by the positioning system to determine the planar angle and position of the first section of the web 110 using infrared light. Figure 4 As shown, the locating pin is a geometric shape protruding from the first cross-section. The cross-sectional shape of the locating pin can be circular, triangular, trapezoidal, polygonal, or other geometric shapes. The purpose of setting the locating pin as a geometric shape is to further maintain the relative height between the first cross-section of one steel-concrete composite U-beam segment 100 and the second cross-section of another steel-concrete composite U-beam segment 100 during splicing, preventing misalignment during splicing and after the first and second cross-sections have been leveled. The length of the locating pin can be less than 0.5 meters. If the locating pin is greater than 0.5 meters, then when two steel-concrete composite U-beam segments 100 are spliced, the locating pin can easily become an obstacle to the movement of the opposite steel-concrete composite U-beam segment 100. Only when the distance between the first and second cross-sections is close to 0.5 meters, the web 110 of the steel-concrete composite U-beam segment 100 is basically in a near-horizontal state, and the crane only needs to make slight adjustments to the steel-concrete composite U-beam segment 100 and lower it to achieve the placement and leveling of the steel-concrete composite U-beam segment 100. At this point, the core problem that this invention aims to solve is how to quickly and accurately adjust and splice the position of the steel-concrete composite U-beam segment 100.

[0034] The cross-section of the locating pin is preferably a non-circular geometry. The advantage of a non-circular geometry is that when one locating pin is inserted into the locating hole, the first and second cross-sections are necessarily leveled. If a circular geometry is used, when one locating pin is inserted into the locating hole, the first and second cross-sections may be vertically inclined, which is detrimental to achieving the rapid splicing and positioning goals of this invention. The cross-section of the web 110 with the locating holes is the second cross-section. The locating holes are slightly larger than the locating pins and structurally matched. The first cross-section of the web 110 has at least three locating pins arranged in a triangle and protruding from the first cross-section. The second cross-section of the web 110 has at least three locating holes arranged in a triangle. When the first cross-section of one web 110 is spliced ​​with the second cross-section of another web 110, the positions and sizes of the locating pins and locating holes match each other. Under infrared irradiation, the locating pins are used as first marker positions to determine the tilt angle and / or position of the first cross-section, and the locating holes are used as second marker positions to determine the tilt angle and / or position of the second cross-section.

[0035] For example, the working principle for determining the first and second cross sections is as follows.

[0036] Assume the geometry of the cross-section of the locating pin is represented as a set. And the cross-section of the corresponding positioning hole is represented as a set. In the optimal case, and Neither of them are circular. To meet the requirements of splicing and positioning, two cross sections can be defined, the first cross section... Second section Wherein: when the cross-section of the locating pin... With positioning holes This will cause during the matching insertion. and Leveling is represented as: .

[0037] If the cross-section of the locating pin is circular, then there exists and Match, but and They may not be parallel, as shown below: ,

[0038] Positioning holes on web 110 It is the second section The dimensions on the surface, and meet the requirements.

[0039] Locating pins on web 110 Arranged in a triangular pattern, and starting from the first section... Protrusion, represented as:

[0040] On the web 110 With another web of During assembly, positioning pins and positioning holes The position and size must match.

[0041] Under infrared illumination, the positioning pin and positioning holes These positions, designated as the first and second marker positions respectively, are used to determine the first cross-section. Second section The tilt angle and / or position.

[0042] The present invention arranges the positioning pins and positioning holes in a triangular pattern, which is beneficial for determining the inclination of the web 110 section in the steel-concrete composite U-beam segment 100, making it easier to level the steel-concrete composite U-beam segment 100, and making it easier to align and adjust two steel-concrete composite U-beam segments 100 to the same plane. This ensures that when the connection of the steel-concrete composite U-beam segments 100 is subjected to force, the direction of the force is consistent with each other, thereby improving the compressive strength and bearing capacity of the steel-concrete composite U-beam and extending the overall service life of the bridge.

[0043] According to a preferred embodiment, such as Figure 1 and Figure 4 As shown, the locating pins include a first locating pin 111, a second locating pin 112, and a third locating pin 113. The distances between the first locating pin 111 and the third locating pin 113 and the second locating pin 112 are equal. The first locating pin 111, the second locating pin 112, and the third locating pin 113 form an isosceles triangle used to determine the inclination angle of the first cross-section. Arranging the three locating pins in an isosceles triangle not only allows the locating pins to withstand pressure at different heights to distribute the pressure at the joint, but also prevents the first and second cross-sections from deflecting or rotating when they come into contact with each other.

[0044] According to a preferred embodiment, such as Figure 1 and Figure 4 As shown, the first positioning pin 111 and the third positioning pin 113 are respectively located near the flange 120. The second positioning pin 112 is located near the bottom surface of the first section of the web 110. The second positioning pin 112 is not on the same straight line as the first positioning pin 111 and the third positioning pin 113, thereby preventing the first section of one web 110 and the second section of the other web 110 from being vertically inclined relative to each other. The three positioning pins of the present invention are arranged in such a way that the overall pressure at the splice can be distributed to the positioning pins at different heights and horizontal positions, and the area within the triangle formed by the three positioning pins is not easily deformed due to pressure due to the bearing effect of the three positioning pins.

[0045] According to a preferred embodiment, such as Figure 2 and Figure 5 As shown, the positioning holes include a first positioning hole 121, a second positioning hole 122, and a third positioning hole 123. The first positioning hole 121 has a first grouting hole 125 communicating with it in the vertical direction. The second positioning hole 122 has a second grouting hole 126 communicating with it in the vertical direction. The third positioning hole 123 has a third grouting hole 124 communicating with it in the vertical direction. A lifting hole 114 is provided on the top plane of the web 110 near the first section. Under infrared irradiation, such as... Figure 3As shown, when the first plane formed by the hoisting hole 114, the first grouting hole 125 and the second grouting hole 126 is perpendicular to the third plane containing the isosceles triangle of the first section of the web 110, it indicates that the planes of the two webs 110 are leveled.

[0046] This invention utilizes the unique plane formed by triangles to determine the coordinate parameters of the first plane formed by the marker positions of different planes. It can quickly and easily determine whether two steel-concrete composite U-beam segments 100 are leveled, simplifying the processor's judgment steps.

[0047] According to a preferred embodiment, such as Figure 3 As shown, under infrared illumination, when the first plane formed by the hoisting hole 114, the first grouting hole 125, and the second grouting hole 126 is on the same plane as the second plane formed by the third grouting hole 124, the first grouting hole 125, and the second grouting hole 126, or when the angle difference between the first plane and the second plane is less than a preset angle threshold, it indicates that the planes of the two web plates 110 are leveled. This invention simplifies the planes of the two steel-concrete composite U-beam segments 100 into two tiny first and second planes, which not only simplifies the amount of data calculation but also accurately determines whether the two steel-concrete composite U-beam segments 100 are leveled.

[0048] The construction method of the steel-concrete composite U-shaped beam of the present invention, as follows: Figure 6 As shown, the steps include: S1: As Figure 3 As shown, when the two web plates 110 are spliced, infrared light is used to irradiate the first cross section of one web plate 110 and the second cross section of the other web plate 110 respectively.

[0049] The positions of the first and second sections of the two web plates 110 are set as follows: and Infrared light was used to illuminate and locate the two cross-sections:

[0050] S2: Determine the first mark position of the positioning pin in the first cross section based on the image and / or infrared reflection parameters of the first cross section, and determine the second mark position of the positioning hole in the second cross section based on the image and / or infrared reflection parameters of the second cross section.

[0051] Let the first mark position of the locating pin in the first section be denoted as The second mark position of the positioning hole in the second section is These two locations can be determined using infrared reflectance parameters: .

[0052] For example, the processor determines the angle between the first cross section and the second cross section in the vertical or horizontal direction based on the coordinate parameters of the first and second marker positions.

[0053] The processor calculates the coordinate parameters of these two locations to determine the tilt angle or position of the cross-section: .

[0054] The final calculation can be obtained or . Indicates the angle of the cross section in the vertical direction; This indicates the angle of the cross section in the horizontal direction.

[0055] S3: Determine the inclination angle and / or position of the first section based on the first marker position, and determine the inclination angle and / or position of the second section based on the second marker position. When the first section and the second section coincide, determine that the two webs are leveled.

[0056] The angle difference between the first and second sections can also be calculated: Δθ represents the angle difference between the first and second cross sections, and cos^(-1) is the inverse cosine function. and It is a vector representation of the cross section.

[0057] When the first section and the second section do not coincide or are not within the predetermined difference range, the processor sends the angle and length parameters to be adjusted to the crane it communicates with, so that the first section of one steel-concrete composite U-beam segment 100 and the second section of another steel-concrete composite U-beam segment 100 can be directly adjusted to coincide, reducing the steps of repeatedly adjusting the position.

[0058] For example, according to and Sure and tilt angle and / or location .if and If they overlap, then the two web plates 110 are considered to be leveled.

[0059] if and If the angle does not coincide or is outside the predetermined difference range, the processor sends angle parameters to the crane. and length parameter In order to adjust the 100mm segment of the steel-concrete composite U-beam. and To achieve the desired overlap, reduce the number of adjustment steps.

[0060] The construction method of the present invention has simple implementation steps, low computational load of the processor and simple calculation steps, and short calculation time. It can provide construction personnel with rapid data or graphic feedback. At the same time, it can accurately judge whether each surface of the splicing meets the standard. Therefore, the construction method of the present invention reduces the implementation difficulty during splicing, and has good leveling effect and high construction efficiency.

[0061] S31: The inclination angle of the first section is determined based on the isosceles triangle formed by the first positioning pin 111, the second positioning pin 112, and the third positioning pin 113. The positioning pins of this invention are arranged in an isosceles triangle, which ensures uniform force distribution on both sides of the web 110 and reduces deformation within the isosceles triangle region. Furthermore, the triangular arrangement of the positioning pins makes it easier to accurately position the first and second sections, reducing the difficulty of accurately bringing the two sections close together.

[0062] S32: Under infrared irradiation, such as Figure 3 As shown, when the first plane formed by the lifting hole 114, the first grouting hole 125, and the second grouting hole 126 is perpendicular to the third plane containing the isosceles triangle of the first section of the web 110, the planes of the two webs 110 are leveled. This construction method makes it easier to calculate the parameters of the first and third planes, thus making it easier to determine whether each steel-concrete composite U-beam segment 100 is adjusted to the designated position, and also makes it easier to control the crane to adjust the steel-concrete composite U-beam segment 100 to the designated position. Therefore, the efficiency of adjusting the position of the steel-concrete composite U-beam segment 100 is higher.

[0063] S33: Under infrared irradiation, such as Figure 3 As shown, when the first plane formed by the hoisting hole 114, the first grouting hole 125, and the second grouting hole 126 is on the same plane as the second plane formed by the third grouting hole 124, the first grouting hole 125, and the second grouting hole 126, or when the angle difference between the first plane and the second plane is less than a preset angle threshold, the plane leveling of the two web plates 110 is determined. This invention determines whether the two planes are leveled based on the parameters of the first and second planes, requiring less data calculation and reducing the difficulty of judgment. Furthermore, parameter-based adjustment makes it easier to adjust the steel-concrete composite U-beam segment 100 to a specified angle or position in one go, significantly reducing the difficulty of adjustment and minimizing the need for repeated leveling steps during splicing.

[0064] S34: As Figure 3As shown, the distance between the lifting hole 114 and the third grouting hole 124 is calculated, and it is determined whether the virtual straight line formed by the lifting hole 114 and the third grouting hole 124 is perpendicular to the first section or the second section. If perpendicular, the leveling of the two steel-concrete composite U-beam segments 100 is verified as qualified. If not perpendicular, it indicates that the centerlines of the two steel-concrete composite U-beam segments 100 are inconsistent. Although the two steel-concrete composite U-beam segments 100 are leveled in the horizontal direction, the flanges 120 of the two steel-concrete composite U-beam segments 100 are misaligned. It is also necessary to confirm whether the positioning pin exists or whether the splice joint is tilted.

[0065] By comparing the distance between the lifting hole 114 and the third grouting hole 124 with a preset distance, it can be determined whether the first section and the second section have overlapped, that is, whether the two steel-concrete composite U-beam segments 100 have been tightly spliced. If the distance between the lifting hole 114 and the third grouting hole 124 is less than or equal to the preset distance, it indicates that the two steel-concrete composite U-beam segments 100 have been tightly spliced. Otherwise, the two steel-concrete composite U-beam segments 100 are not tightly spliced ​​and further adjustments are needed.

[0066] It should be noted that the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this invention, and these solutions all fall within the scope of this invention and its protection. Those skilled in the art should understand that this specification and its accompanying drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this invention is defined by the claims and their equivalents. This specification contains multiple inventive concepts; phrases such as "preferredly" or "according to a preferred embodiment" indicate that the corresponding paragraph discloses an independent concept. The applicant reserves the right to file divisional applications based on each inventive concept.

Claims

1. A construction method for a steel-concrete composite U-beam, wherein the steel-concrete composite U-beam is integrally formed by prefabrication of a web (110) and flanges (120), wherein the flanges (120) are disposed on both sides of the web (110). The first section of the web (110) is provided with at least three locating pins distributed in a triangular pattern and protruding from the first section. The second section of the web (110) is provided with at least three positioning holes arranged in a triangle. When the first section of one web (110) is spliced ​​with the second section of another web (110), the position and size of the positioning pin and the positioning hole match each other. in, The positioning holes include a first positioning hole (121), a second positioning hole (122), and a third positioning hole (123). The first positioning hole (121) has a first grouting hole (125) communicating with it in the vertical direction. The second positioning hole (122) has a second grouting hole (126) communicating with it in the vertical direction. The third positioning hole (123) has a third grouting hole (124) communicating with it in the vertical direction. The top plane of the web (110) near the first section is provided with a lifting hole (114). Under infrared illumination, the positioning pin is used as a first marker position to determine the tilt angle and / or position of the first cross section, and the positioning hole is used as a second marker position to determine the tilt angle and / or position of the second cross section. The construction method is characterized by the following steps: When the two webs (110) are spliced ​​together, infrared light is used to irradiate the first section of one web (110) and the second section of the other web (110); The first mark position of the positioning pin in the first cross section is determined based on the image and / or infrared reflection parameters of the first cross section, and the second mark position of the positioning hole in the second cross section is determined based on the image and / or infrared reflection parameters of the second cross section. The tilt angle and / or position of the first section are determined according to the position of the first mark, and the tilt angle and / or position of the second section are determined according to the position of the second mark; when the first section and the second section coincide, it is determined that the two web plates (110) planes are leveled. Under infrared irradiation, when the first plane formed by the hoisting hole (114), the first grouting hole (125) and the second grouting hole (126) is perpendicular to the third plane containing the isosceles triangle of the first section of the web (110), it indicates that the planes of the two webs (110) are leveled. When the first plane formed by the hoisting hole (114), the first grouting hole (125) and the second grouting hole (126) is on the same plane as the second plane formed by the third grouting hole (124), the first grouting hole (125) and the second grouting hole (126), or when the angle difference between the first plane and the second plane is less than a preset angle threshold, it indicates that the planes of the two webs (110) are leveled.

2. The construction method of the steel-concrete composite U-shaped beam according to claim 1, characterized in that, The positioning pins include a first positioning pin (111), a second positioning pin (112), and a third positioning pin (113). The distances between the first positioning pin (111) and the third positioning pin (113) and the second positioning pin (112) are equal, so that the first positioning pin (111), the second positioning pin (112) and the third positioning pin (113) form an isosceles triangle for determining the inclination angle of the first cross section.

3. The construction method of the steel-concrete composite U-shaped beam according to claim 2, characterized in that, The first positioning pin (111) and the third positioning pin (113) are respectively located near the wing plate (120). The second positioning pin (112) is located near the bottom surface of the first section of the web (110), and the second positioning pin (112) is not on the same straight line as the first positioning pin (111) and the third positioning pin (113), thereby preventing the first section of one web (110) and the second section of the other web (110) from being vertically inclined relative to each other.

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