Steel-concrete combined wet joint structure for transverse connection of T-shaped beams and manufacturing method of steel-concrete combined wet joint structure

Abstract

The invention relates to the field of bridge assembly technology construction, and discloses a steel-concrete combined wet joint structure for T-beam transverse connection and a manufacturing method of the steel-concrete combined wet joint structure. The steel-concrete combined wet joint structure for transverse connection of the T-beams comprises a first T-beam, a second T-beam and a steel-concrete combined structure, wherein the top of the first T-beam and the top of the second T-beam are of stepped section structures; the steel-concrete composite structure comprises a preset fixing part and a pouring part, the preset fixing part is arranged on a lower step of the step-shaped section structure, and the preset fixing part and the pouring part are connected together to perform first transverse connection; the pouring part is fixedly connected to the preset fixing part through pouring so as to carry out second-time transverse connection. According to the T-beam transverse connection steel-concrete combined wet joint structure and the manufacturing method thereof, the steel-concrete combined structure is adopted instead of a suspended formwork, so that the concrete consumption is reduced, the self weight of the structure is reduced, the construction period is shortened, and the construction quality is improved.

Description

Technical Field

[0001] The present application relates to the field of bridge assembly technology and construction, and in particular to a steel-concrete composite wet joint structure for transverse connection of T-beams and a manufacturing method thereof. Background Art

[0002] Prefabricated reinforced concrete structures have become a major trend in bridge construction due to their numerous advantages, including rapid construction cycles, high quality, and minimal environmental impact. Wet joints, a crucial component of prefabricated concrete beam bridges, play a significant role in strengthening the lateral connection of the bridge deck and ensuring structural integrity.

[0003] However, there are also problems such as long installation and disassembly period of cast-in-place wet joint hanging formwork construction and difficulty in ensuring construction quality.

[0004] Therefore, there is an urgent need for a steel-concrete composite wet joint structure and construction method with multiple T-beams connected horizontally to solve the problems of long assembly and disassembly period of wet joint hanging formwork construction and difficulty in ensuring construction quality. Summary of the Invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The disclosed embodiments provide a steel-concrete composite wet joint structure for transverse connection of T-beams and a manufacturing method thereof, which reduces the amount of concrete used, lowers the deadweight of the structure, shortens the construction period, and improves the construction quality by adopting a steel-concrete composite structure instead of setting a hanging formwork.

[0007] In a first aspect, embodiments of the present disclosure provide a steel-concrete composite wet joint structure for transversely connecting T-beams. The steel-concrete composite wet joint structure for transversely connecting T-beams comprises a first T-beam and a second T-beam, wherein the tops of the first and second T-beams have a stepped cross-section structure; a steel-concrete composite structure comprising a predetermined fixing portion and a casting portion, wherein the predetermined fixing portion is disposed on a lower step of the stepped cross-section structure and is connected together to form a first transverse connection; and the casting portion is cast and fixed to the predetermined fixing portion to form a second transverse connection.

[0008] In the preferred technical solution of the above-mentioned steel-concrete combined wet joint structure for transverse connection of T-beams, the first T-beam and the second T-beam are both prefabricated reinforced concrete components, and the stepped section of the stepped section structure is a section composed of at least two rectangular combinations.

[0009] In the preferred technical solution of the steel-concrete composite wet joint structure for transverse connection of T-beams, there are multiple preset fixing parts, and the multiple preset fixing parts are evenly arranged in the lower steps of the stepped section structure.

[0010] In the preferred technical solution of the above-mentioned steel-concrete composite wet joint structure for transverse connection of T-beams, the preset fixing parts are arranged relative to each other after the first T-beam and the second T-beam are in place.

[0011] In the preferred technical solution of the above-mentioned steel-concrete combined wet joint structure for transverse connection of T-beams, the preset fixing part is a wet joint embedded I-beam.

[0012] In the preferred technical solution of the above-mentioned steel-concrete combined wet joint structure for transverse connection of T-beams, the cross-sectional height of the wet joint embedded I-beams is 10-15 cm, the embedded T-beam length is 30-50 cm, and the spacing between the wet joint embedded I-beams is 1.5-2 m.

[0013] In the preferred technical solution of the above-mentioned steel-concrete combined wet joint structure for transverse connection of T-beams, the steel-concrete combined wet joint structure for transverse connection of T-beams further comprises bolts and connecting steel plates, a plurality of threaded holes are provided on the side of the wet joint embedded I-beam away from the first T-beam and the second T-beam, and through holes are provided on the connecting steel plate corresponding to the threaded holes so as to connect the wet joint embedded I-beam together through bolts and the connecting steel plate.

[0014] In the preferred technical solution of the above-mentioned steel-concrete combined wet joint structure for transverse connection of T-beams, the steel-concrete combined wet joint structure for transverse connection of T-beams further includes a steel bottom formwork, the steel bottom formwork has a recess corresponding to the connecting steel plate, and the steel bottom formwork is arranged between adjacent wet joint embedded I-beams to form a bottom rigid structure plane support member.

[0015] In the preferred technical solution of the above-mentioned steel-concrete composite wet joint structure for transverse connection of T-beams, the casting part is evenly cast on the bottom rigid structure plane support member and cast together with the first T-beam and the second T-beam. The thickness of the casting part is 15-20 cm.

[0016] In a second aspect, an embodiment of the present disclosure further provides a method for manufacturing a steel-concrete composite wet joint structure for transverse connection of T-beams, the method comprising: prefabricating a first T-beam, a second T-beam, and a wet joint embedded I-beam; evenly embedding the wet joint embedded I-beams according to a preset spacing along the length direction of the first T-beam and the second T-beam; after hoisting the first T-beam and the second T-beam into place, performing a first transverse connection by connecting steel plates and bolts; laying the steel bottom formwork on the wet joint embedded I-beams to form a bottom rigid structure plane support; pouring concrete on the bottom rigid structure plane support to fix the first T-beam and the second T-beam together, for a second transverse connection to form a steel-concrete composite wet joint structure.

[0017] The steel-concrete combined wet joint structure for transverse connection of T-beams and the manufacturing method thereof provided in the embodiments of the present disclosure can achieve the following technical effects: The cross-sectional form of the wet joint is adjusted from the traditional rectangular wet joint section to a stepped wet joint section, and the connection method and material of the wet joint are adjusted from the traditional reinforced concrete structure to a steel-concrete composite structure. The traditional wet joint construction requires the setting of a hanging formwork, and the adjusted structure uses a built-in steel bottom formwork.

[0018] The steel-concrete combined wet joints effectively reduce the amount of concrete used and reduce the deadweight of the structure to a certain extent.

[0019] The lower wet joint of the steel-concrete combined wet joint adopts steel structure, and the upper wet joint adopts reinforced concrete structure, which can give full play to the mechanical properties of each material. The steel structure below the wet joint is under tension, and the concrete above the wet joint is under compression.

[0020] The built-in steel bottom formwork can effectively avoid the problems of long formwork installation and removal cycle and difficult construction quality control in traditional hanging formwork construction. In addition, the steel bottom formwork can be used as a stress-bearing part of the cast-in-place wet joint structure to give full play to the tensile properties of steel.

[0021] In summary, the steel-concrete composite wet joint structure used for the transverse connection of T-beams effectively solves the problems of long installation and disassembly of formwork and difficulty in ensuring construction quality in traditional cast-in-place wet joint hanging formwork construction, fully utilizes the mechanical properties advantages of each material, and improves the structural stress to a certain extent.

[0022] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition, Figure 1 A schematic cross-sectional view of a T-beam of a steel-concrete composite wet joint structure for transverse connection of T-beams provided by the present invention is shown; Figure 2 A three-dimensional schematic diagram of a T-beam of a steel-concrete combined wet joint structure for transverse connection of T-beams provided by the present invention is shown; Figure 3 A schematic cross-sectional view of the wet joint of the T-beam provided by the present invention after pre-embedded I-beam connection is shown; Figure 4 A three-dimensional schematic diagram of the wet joint of the T-beam provided by the present invention after the pre-embedded I-beam is connected; Figure 5 It shows a cross-sectional schematic diagram of the T-beam provided by the present invention after the wet joint pre-embedded I-beam is connected to the steel bottom form; Figure 6 It shows a three-dimensional schematic diagram of the T-beam provided by the present invention after the wet joint pre-embedded I-beam is connected to the steel bottom form; Figure 7 A schematic cross-sectional view of a steel-concrete composite structure of a T-beam provided by the present invention is shown; Figure 8 A three-dimensional schematic diagram of the steel-concrete composite structure of the T-beam provided by the present invention is shown; Figure 9 Another perspective schematic diagram of the steel-concrete composite structure of the T-beam provided by the present invention is shown; Figure 10 It shows an exploded schematic diagram of the steel bottom form provided by the present invention being arranged after the I-beam is embedded in the wet joint; Figure 11 A three-dimensional schematic diagram of the wet joint embedded I-beam provided by the present invention is shown; Figure 12 It shows an exploded schematic diagram of two adjacent wet joint embedded I-beams provided by the present invention after being connected; Figure 13 A schematic flow chart of a method for manufacturing a steel-concrete composite wet joint structure for transverse connection of T-beams provided by the present invention is shown.

[0024] Reference numerals: 1. First T-beam; 2. Second T-beam; 3. Steel-concrete composite structure; 31. Pre-set fixing part; 311. Threaded hole; 32. Casting part; 4. Step-type cross-section structure; 5. Bolt; 6. Connecting steel plate; 61. Through hole; 7. Steel bottom formwork; 71. Recess; 8. Bottom steel structure plane support; 9. Nut. DETAILED DESCRIPTION

[0025] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0026] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0027] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0028] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0029] Unless otherwise stated, the term "plurality" means two or more.

[0030] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0031] First, as Figure 1 、 Figure 2 and Figure 7As shown, embodiments of the present disclosure provide a steel-concrete composite wet joint structure for transverse T-beam connections. The steel-concrete composite wet joint structure for transverse T-beam connections includes a first T-beam 1, a second T-beam 2, and a steel-concrete composite structure 3. The tops of the first and second T-beams 1 and 2 are formed into a stepped cross-section structure 4. The steel-concrete composite structure 3 includes a pre-set fixing portion 31 and a cast portion 32. The pre-set fixing portion 31 is disposed on the lower step of the stepped cross-section structure 4 and is connected together to form a first transverse connection. The cast portion 32 is cast and fixed to the pre-set fixing portion 31 to form a second transverse connection.

[0032] Specifically, the traditional wet joint structure of the T-beam is a cast-in-place reinforced concrete structure with a rectangular wet joint section. After the T-beam is installed in place, the wet joint concrete is poured by setting a wet joint hanging formwork. In this article, the T-beam is prefabricated first. The number of T-beams is set according to construction requirements. In the connection process of each section, two T-beams are included, namely, the first T-beam 1 and the second T-beam 2. The shape and structure of the T-beam are both traditional shapes and structures. At least the top of the opposite side of the first T-beam 1 and the second T-beam 2 is a step-type cross-section structure 4. The top refers to the wider side of the T-beam. The preset fixing portion 31 is inserted into the lower step of the step-type cross-section structure 4, and the inserted part is longer than the part exposed to the outside. When the relative preset fixing portions 31 of the first T-beam 1 and the second T-beam 2 are fixed together, the first connection is achieved in the transverse direction of the two T-beams, that is, the first transverse connection. Afterwards, concrete is poured onto the upper sides of the connected pre-fixed portions 31 to form a pouring portion 32, thus achieving a second transverse connection between the two T-beams. This second transverse connection eliminates the need for a hanging formwork, thereby reducing concrete usage, lowering the structure's deadweight, shortening the construction period, and improving construction quality.

[0033] In particular, the first T-beam 1 and the second T-beam 2 are completely identical T-beams.

[0034] like Figures 1 to 2 As shown, in the preferred technical solution of the present application, the first T-beam 1 and the second T-beam 2 are both prefabricated reinforced concrete components, and the stepped section of the stepped section structure 4 is a section composed of at least two rectangles.

[0035] Specifically, to expedite construction and improve workpiece quality, the first and second T-beams 1 and 2 are preferably prefabricated components, primarily composed of reinforced concrete. The stepped cross-section structure 4 has a "Lv"-shaped cross-section, formed by combining two rectangular cross-sections. Compared to traditional rectangular cross-sections, this stepped cross-section structure 4 is more adaptable to the combined transverse connection of the pre-set fixing portion 31 and the casting portion 32, improving the connection strength.

[0036] Preferably, the step depth of the stepped cross-section structure 4 is 30 cm to 40 cm, and the step height is 10 cm to 15 cm.

[0037] like Figure 2 As shown, in the preferred technical solution of the present application, there are multiple preset fixing parts 31, and the multiple preset fixing parts 31 are evenly arranged in the lower step of the step-type cross-section structure.

[0038] Specifically, the number of the preset fixing portions 31 depends on the lengths of the first T-beam 1 and the second T-beam 2 , and the fixing portions 31 are arranged at a certain distance along the length direction of the first T-beam 1 and the second T-beam 2 .

[0039] like Figure 1 As shown, in the preferred technical solution of the present application, the preset fixing portion 31 is arranged relative to the first T-beam 1 and the second T-beam 2 after they are in place.

[0040] Specifically, the first T-beam 1 and the second T-beam 2 are preferably completely identical T-beams. After the two are hoisted into place, the preset fixing parts 31 are arranged corresponding to each other so that the relative preset fixing parts 31 can be connected together in the subsequent steps to achieve the first horizontal connection.

[0041] like Figure 2 and Figure 11 As shown, in the preferred technical solution of the present application, the preset fixing portion 31 is a wet seam embedded I-beam.

[0042] Specifically, the wet-joint pre-embedded I-beams, as an excellent steel structure component, can be prefabricated in advance. The wet-joint pre-embedded I-beams are evenly arranged along the length direction of the first T-beam 1 and the second T-beam 2, and are arranged in pairs for easy connection.

[0043] like Figure 1 、 Figure 2 and Figure 11 As shown, in the preferred technical solution of the present application, the cross-sectional height of the wet joint embedded I-beam is 10-15 cm, the embedded T-beam length is 30-50 cm, and the spacing between the wet joint embedded I-beams is 1.5-2 m.

[0044] Specifically, the cross-sectional height of the pre-embedded wet-joint I-beam corresponds to the height of the step of the stepped cross-section structure 4, enabling it to be better embedded within the step. The embedded T-beam length of the pre-embedded wet-joint I-beam should be greater than or equal to the depth of the step to facilitate processing. To improve strength, the embedded depth should not be too short, so the embedded T-beam length is set at 30-50 cm. The spacing between the pre-embedded wet-joint I-beams is 1.5-2 m, which facilitates the subsequent formation of the steel-concrete composite wet-joint structure while maintaining sufficient strength.

[0045] like Figures 1 to 6 and Figure 12 As shown, in the preferred technical solution of the present application, the steel-concrete composite wet joint structure for transverse connection of T-beams further includes: bolts 5 and connecting steel plates 6. The wet joint pre-embedded I-beam is provided with a plurality of threaded holes 311 on a side away from the first T-beam 1 and the second T-beam 2. The connecting steel plate 5 is provided with through holes 61 corresponding to the threaded holes 311 to connect the wet joint pre-embedded I-beam together through the bolts 5 and the connecting steel plate 6.

[0046] Specifically, four connecting steel plates 6 are preferably provided, one on each side of two laterally opposing pre-embedded wet-joint I-beams to connect them. Once the connecting steel plates 6 are in place, the through-holes 61 thereon align with the threaded holes 311 of the pre-embedded wet-joint I-beams. This allows the two laterally opposing pre-embedded wet-joint I-beams to be secured together using the nuts 9, bolts 5, and the four connecting steel plates 6. The threaded holes 311 and through-holes 61 are the same number, and can be four, six, eight, or even more, to securely connect the two laterally opposing pre-embedded wet-joint I-beams.

[0047] like Figure 5 、 Figure 6 and Figure 10 As shown, in the preferred technical solution of the present application, the steel-concrete combined wet joint structure for transverse connection of T-beams further includes: a steel bottom formwork 7, which has a recess 71 corresponding to the connecting steel plate 6, and the steel bottom formwork 7 is arranged between adjacent wet joint embedded I-beams to form a bottom rigid structure plane support member 8.

[0048] Specifically, the number of steel bottom formworks 7 depends on the number of wet-joint embedded I-beams on a single T-beam. In other words, the number of steel bottom formworks 7 is one less than the number of wet-joint embedded I-beams on a single T-beam. Each steel bottom formwork 7 is placed on top of two adjacent wet-joint embedded I-beams. The steel bottom formwork 7 is preferably a flat steel plate, which has recesses 71 on both sides of the wet-joint embedded I-beams to avoid the connection between the two adjacent wet-joint embedded I-beams. The length of the steel bottom formwork 7 is adapted to the length of the two adjacent wet-joint embedded I-beams on a single T-beam. The width of the steel bottom formwork 7 can be placed on the step of the first T-beam 1 and the second T-beam 2 after the two laterally adjacent wet-joint embedded I-beams are connected together. The thickness of the steel bottom formwork 7 is preferably 2-4 cm, and in particular, the thickness of the steel bottom formwork 7 is 2-3 cm to achieve the overall strength requirements.

[0049] like Figures 7 to 9 As shown, in the preferred technical solution of the present application, the casting part 32 is evenly cast on the bottom rigid structure plane support member 8, and is cast together with the first T beam 1 and the second T beam 2, and the thickness of the casting part is 15-20 cm.

[0050] Specifically, the casting portion 32 can be cast on-site using steel bars and concrete. This allows it to be integrated with the bottom rigid structural planar support member 8, forming a steel-concrete composite wet-jointed structure with an upper reinforced concrete structure and a lower steel structure. Alternatively, it can be prefabricated and subsequently secured to the bottom rigid structural planar support member 8 using other fixing methods, forming a steel-concrete composite wet-jointed structure. This fixing method can, for example, be through drilling and threading, or any other connection method that achieves a fixed connection to the bottom rigid structural planar support member 8.

[0051] In the present disclosure, the cross-sectional form of the wet joint is adjusted from the traditional rectangular wet joint section to a stepped wet joint section, and the connection method and material of the wet joint are adjusted from the traditional reinforced concrete structure to a steel-concrete composite structure. The traditional wet joint construction requires the setting of a hanging formwork, and the adjusted structure adopts a built-in steel bottom formwork.

[0052] The steel-concrete combined wet joints effectively reduce the amount of concrete used and reduce the deadweight of the structure to a certain extent.

[0053] The lower wet joint of the steel-concrete combined wet joint adopts steel structure, and the upper wet joint adopts reinforced concrete structure, which can give full play to the mechanical properties of each material. The steel structure below the wet joint is under tension, and the concrete above the wet joint is under compression.

[0054] The built-in steel bottom formwork 7 can effectively avoid the problems of long installation and removal period of formwork and difficult to control construction quality in traditional hanging formwork construction. In addition, the steel bottom formwork 7 can be used as a stress-bearing part of the cast-in-place wet joint structure to give full play to the tensile properties of steel.

[0055] In summary, the steel-concrete composite wet joint structure used for the transverse connection of T-beams effectively solves the problems of long installation and disassembly of formwork and difficulty in ensuring construction quality in traditional cast-in-place wet joint hanging formwork construction, fully utilizes the mechanical properties advantages of each material, and improves the structural stress to a certain extent.

[0056] Second, as Figure 13 As shown, an embodiment of the present disclosure further provides a method for manufacturing a steel-concrete composite wet joint structure for transverse connection of T-beams, the method comprising: S1: Prefabricate the first T-beam, the second T-beam and the embedded I-beam in the wet joint; S2: pre-embed the wet joints and I-beams evenly along the length direction of the first T-beam and the second T-beam according to the preset spacing; S3: After the first T-beam and the second T-beam are hoisted into place, the first transverse connection is performed by connecting steel plates and bolts; S4: Laying the steel bottom formwork on the wet joint embedded I-beam to form a bottom rigid structure plane support member; S5: pouring concrete on the bottom rigid structure plane support to fix the first T-beam and the second T-beam together to perform a second transverse connection to form a steel-concrete composite wet joint structure.

[0057] Specifically, if Figure 13 As shown, in the manufacturing method of the steel-concrete composite wet joint structure for the transverse connection of T-beams, the following components are first prefabricated in the factory, including wet joint embedded I-beams, connecting steel plates, steel bottom formwork and other steel structural components. Threaded holes and through holes are respectively tapped at the corresponding positions of the wet joint embedded I-beams and the connecting steel plates. Secondly, the first T-beam and the second T-beam are prefabricated, and the wet joint embedded I-beams are arranged at a certain interval along the length of the first T-beam and the second T-beam. Thirdly, all the above-mentioned prefabricated components are transported to the construction site, the first T-beam and the second T-beam are hoisted into place, and then the first transverse connection and fixation are performed by connecting steel plates and high-strength bolts. Fourthly, the pre-designed steel bottom formwork is placed on the wet joint embedded I-beam, and the steel bottom formwork is fixed to the wet joint embedded I-beam by welding. Fifthly, after the steel bottom membrane is fixed to the wet joint embedded I-beam, the reinforced concrete structure is poured to complete the second transverse connection and fixation, thereby forming a steel-concrete composite wet joint structure for the transverse connection of T-beams.

[0058] The steel-concrete composite wet joint structure for the transverse connection of T-beams formed by this method effectively solves the problems of long installation and disassembly of formwork and difficulty in ensuring construction quality in traditional cast-in-place wet joint hanging formwork construction, fully utilizes the mechanical properties advantages of each material, and improves the structural stress to a certain extent.

[0059] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A steel-concrete composite wet joint structure for transverse connection of T-beams, characterized in that: include: A first T-beam and a second T-beam, wherein the tops of the first T-beam and the second T-beam are stepped cross-section structures; The steel-concrete composite structure includes a preset fixing part and a casting part. The preset fixing part is arranged on the lower step of the stepped cross-section structure and is connected together to perform a first transverse connection; the casting part is fixed to the preset fixing part by casting to perform a second transverse connection.

2. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 1, characterized in that: The first T-beam and the second T-beam are both prefabricated reinforced concrete components, and the stepped section of the stepped section structure is a section composed of at least two rectangles.

3. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 1 or 2, characterized in that: There are multiple preset fixing parts, and the multiple preset fixing parts are evenly arranged in the lower step of the step-shaped cross-section structure.

4. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 3, characterized in that: The preset fixing portion is arranged relative to each other after the first T-beam and the second T-beam are in place.

5. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 3, characterized in that: The preset fixing portion is a wet seam embedded I-beam.

6. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 5, characterized in that: The cross-sectional height of the wet joint pre-embedded I-beam is 10-15 cm, the length of the embedded T-beam is 30-50 cm, and the spacing between the wet joint pre-embedded I-beams is 1.5-2 m.

7. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 6, characterized in that: Also includes: Bolts and connecting steel plates, a plurality of threaded holes are opened on the side of the wet joint embedded I-beam away from the first T beam and the second T beam, and through holes are opened on the connecting steel plate corresponding to the threaded holes to connect the wet joint embedded I-beam together through bolts and the connecting steel plate.

8. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 7, characterized in that: Also includes: A steel bottom mold is provided with a recess corresponding to the connecting steel plate, and the steel bottom mold is arranged between adjacent wet joint embedded I-beams to form a bottom rigid structure plane support member.

9. The steel-concrete composite wet joint structure for transverse connection of T-beams according to claim 8, characterized in that: The casting portion is evenly cast on the bottom rigid structure plane support member and cast together with the first T-beam and the second T-beam. The thickness of the casting portion is 15-20 cm.

10. A method for manufacturing a steel-concrete composite wet joint structure for transverse connection of T-beams, characterized in that: The method comprises: Prefabricate the first T-beam, second T-beam and embedded I-beam in wet joints; Evenly pre-embedding the wet joint pre-embedded I-beams along the length direction of the first T-beam and the second T-beam according to a preset interval; After the first T-beam and the second T-beam are hoisted into place, the first transverse connection is made by connecting steel plates and bolts; Laying the steel bottom formwork on the wet joint embedded I-steel to form a bottom rigid structure plane support member; Concrete is poured on the bottom rigid structure plane support to fix the first T-beam and the second T-beam together, so as to perform a second transverse connection and form a steel-concrete composite wet joint structure.

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