High-position large-size bridge tower cross beam and using method

Abstract

The embodiment of the invention provides a high-position large-size bridge tower cross beam and a using method, and the high-position large-size bridge tower cross beam comprises a cross beam body which comprises a plurality of cross beam units; the connecting end assemblies are connected with the two ends of the cross beam body respectively and abut against the corresponding tower limbs of the bridge tower at the same time, so that the cross beam body and the connecting end assemblies are fixed between the opposite tower limbs; the connecting assemblies are pre-buried in the cross beam units and the connecting end assemblies and used for connecting the two adjacent cross beam units and connecting the cross beam units and the connecting end assemblies; the cross beam units and the connecting end assemblies are prefabricated parts, and the face used for being connected with the other cross beam unit is a smooth plane. According to the high-position large-size bridge tower cross beam, the construction cost and the labor requirement can be reduced, construction is convenient, and the construction safety and the construction efficiency are improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of bridge construction, and in particular to a high-position large-volume concrete bridge tower crossbeam and a construction method. Background Art

[0002] A bridge tower refers to a tower-shaped building that supports the main beam of a bridge. The design and construction of a bridge tower is crucial to the overall stability of the bridge. The structural shapes of bridge towers vary, such as H-type, A-type, etc. Various types of bridge towers at least include tower limbs and bridge tower crossbeams arranged between the tower limbs. The bridge tower crossbeam is a key component in the bridge tower structure, usually located at the top or middle of the bridge tower, and is used to connect and support various parts of the bridge tower. For example, the supporting function: the crossbeam effectively disperses and transmits the load borne by the bridge tower through its structural design, ensuring the stability and safety of the bridge tower; the stabilizing function: it can enhance the overall stability of the bridge tower and prevent deformation or collapse under external forces such as strong winds or earthquakes.

[0003] Taking the H-type bridge tower as an example, the H-type bridge tower has multiple layers of beams, and the opposite surfaces of the two tower columns (tower limbs) of the main tower are vertical or tending to be vertical. The traditional process of casting the middle and upper beams of the H-type bridge tower is generally to cast the middle tower column first, set up the middle beam bracket, complete the casting of the middle beam, then remove the middle beam bracket, cast the upper tower column, set up the tower column upper beam bracket, complete the casting of the upper beam, and finally remove the upper beam bracket. Although this method can effectively complete the casting of the middle and upper beams of the bridge tower, the overall process is cumbersome and can only be cast on site, which is labor-intensive and time-consuming. Summary of the invention

[0004] The embodiment of the present invention provides a high-position large-volume bridge tower cross beam and a use method that can reduce construction costs and labor requirements, facilitate construction, and improve construction safety and construction efficiency.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a high-position large-volume bridge tower cross beam, comprising:

[0006] A beam body, comprising a plurality of beam units;

[0007] The connecting end components are respectively connected to the two ends of the cross beam body and abut against the corresponding tower limbs of the bridge tower to fix the cross beam body and the connecting end components between the opposite tower limbs;

[0008] A connecting component, pre-buried in the beam unit and the connecting end component, used to connect two adjacent beam units, and to connect the beam unit and the connecting end component;

[0009] Wherein, the cross beam unit and the connection end assembly are prefabricated components, and the surface used for connecting another cross beam unit is a smooth plane.

[0010] In some embodiments, the beam unit is a hollow cylinder.

[0011] In some embodiments, the cross section of the beam unit is in the shape of a U-shaped triangle.

[0012] In some embodiments, the beam unit and the connection end assembly are formed by casting using micro-expansive concrete, and the cast beam unit is cured until its strength reaches 90% of the maximum strength value of the material.

[0013] In some embodiments, the beam unit and the connecting end assembly each have two opposite connecting surfaces, and the connecting surfaces are verified by performing point cloud scanning on the prefabricated beam unit and the connecting end assembly, and combining the virtual pre-assembly method to verify the smoothness and the structural accuracy of the beam unit and the connecting end assembly. When the smoothness and structural accuracy meet the requirements, the connection position error of the beam unit and the connecting end assembly is at least not greater than 0.5 mm.

[0014] In some embodiments, the prefabricated connection assembly includes multiple groups of steel corbels, each of which is provided with a bolt connector on the side surface, and two adjacent beam units, or a beam unit and a connection end assembly are connected by bolts or bolt connectors.

[0015] In some embodiments, a plurality of groups of prestressed tendons are arranged in the crossbeam unit and the connecting end assembly. The prestressed tendons are bent and include a horizontal section and vertical sections located at both ends of the horizontal section. The horizontal section is located in the crossbeam body and the connecting end assembly, and the two vertical sections extend into the corresponding bridge tower limbs respectively.

[0016] In some embodiments, the connecting end assembly includes a first connecting end member and a second connecting end member, and the length of each of the beam units and the first connecting end and the second connecting end is 3m-5m.

[0017] Another embodiment of the present invention further provides a method for using a bridge tower crossbeam, comprising:

[0018] Prefabricated connection end assembly and a plurality of cross beam units, the connection end assembly comprises a first connection end member and a second connection end member, the cross beam unit and the connection end assembly are both hollow;

[0019] Verify the prefabrication accuracy and connection surface smoothness of the beam unit and the connection end assembly by point cloud scanning method and virtual pre-assembly method, wherein the connection surface is the surface of the beam unit and the connection end member used to connect with the adjacent beam unit and the connection end member;

[0020] A connection component is pre-embedded on the beam unit and the connection end component;

[0021] Installing integral steel hoops on two tower limbs that are arranged opposite to each other, and using the steel hoops to push the two tower limbs in relatively distant directions, so that the two tower limbs are relatively far away from each other and the distance between them is increased;

[0022] Arrange the plurality of prefabricated beam units into a straight line, and place the first connecting end member and the second connecting end member at both ends of the plurality of beam units arranged in the straight line, respectively, to form a prefabricated beam;

[0023] Using a hoisting device to hoist the prefabricated cross beam between the two tower limbs, removing the external force applied to the two tower limbs, causing the two tower limbs to reset, thereby pressing and fixing the prefabricated cross beam, so that the prefabricated cross beam is limited between the two tower limbs;

[0024] Entering the interior of the prefabricated crossbeam to fix and connect two adjacent crossbeam units and the connecting components between the crossbeam units and the connecting end members;

[0025] Removing the connection between the prefabricated beam and the lifting equipment;

[0026] Prestress is applied to the prefabricated cross beams and tower limbs.

[0027] In some embodiments, applying prestress to the prefabricated beams and tower legs comprises:

[0028] Continuously applying prestress in the initial state to the prefabricated cross beam and the tower limb to ensure that the compression force inside the prefabricated cross beam and between the prefabricated cross beam and the tower limb is stable;

[0029] Prestressed steel bars are inserted into the prefabricated cross beams and tower limbs. The prestressed steel bars include a horizontal section and two vertical sections formed by both ends of the horizontal section extending upward or downward. The horizontal section passes through the prefabricated cross beam, and the two vertical sections extend into corresponding tower limbs respectively.

[0030] In some embodiments, the tower limbs are prefabricated by pouring using micro-expansive concrete, and the cast tower limbs are used on the construction site after being cured until their strength reaches 90% of the maximum strength of the material.

[0031] Based on the disclosure of the above embodiments, it can be known that the embodiments of the present invention have the following beneficial effects:

[0032] 1. This method allows the beams to be prefabricated in the prefabricated component factory, and the prefabricated components are inspected through point cloud scanning and virtual pre-assembly technology to ensure the dimensional accuracy, smooth connection surface and fixed connection position of the prefabricated components. This method not only improves the quality of structural molding, but also reduces the possibility of construction being affected by structural errors during on-site construction;

[0033] 2. By adopting the construction method of factory prefabrication and high-position hoisting and positioning the beams, the inconvenience caused by the cumbersome process of traditional temporary support and high-altitude pumping of concrete to prepare beams on site is avoided. Compared with the traditional method, this application scheme significantly reduces the demand for manpower, helps to speed up the construction progress and reduce the construction cost;

[0034] 3. The overall structure of the beam has multiple safety protection structures, including the use of prestressed stress to achieve structural deformation coordination, the use of embedded steel brackets and bolts to connect adjacent structural parts, and the multi-layer protection of internal steel bars, which provides extremely high safety for the entire beam and ensures the stability and durability of the structure during construction and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of a high-position large-volume bridge tower crossbeam in an embodiment of the present invention.

[0036] Figure 2 It is a partial structural schematic diagram of a high-position large-volume bridge tower cross beam in an embodiment of the present invention.

[0037] Figure 3 It is another partial structural schematic diagram of the high-position large-volume bridge tower cross beam in an embodiment of the present invention.

[0038] Figure 4 It is a schematic diagram of the assembly process of the high-position large-volume bridge tower cross beam in an embodiment of the present invention.

[0039] Reference numerals:

[0040] 1- beam unit; 2- first connecting end member; 3- second connecting end member; 4- steel corbel; 5- prestressed steel bar; 6- tower limb. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the present invention.

[0042] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.

[0043] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0044] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0045] It should also be understood that, although the invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the invention that have the characteristics recited in the claims and are therefore within the scope of protection defined thereby.

[0046] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0047] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0048] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0049] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0050] like Figure 1 As shown, an embodiment of the present invention provides a high-position large-volume bridge tower cross beam, comprising:

[0051] A beam body, comprising a plurality of beam units 1;

[0052] The connecting end components are respectively connected to the two ends of the cross beam body and abut against the corresponding tower limbs 6 of the bridge tower to fix the cross beam body and the connecting end components between the opposite tower limbs 6;

[0053] A connecting component, pre-buried in the beam unit 1 and the connecting end component, used to connect two adjacent beam units 1, and to connect the beam unit 1 and the connecting end component;

[0054] The cross beam unit 1 and the connection end assembly are prefabricated components, and the surface used for connecting to another cross beam unit 1 is a smooth plane.

[0055] Based on the above content, it can be known that the high-position large-volume bridge tower crossbeam in this embodiment is prepared by improving its structural form and adopting a segmented prefabrication method. That is, the method of this embodiment allows the crossbeam to be prefabricated in a prefabricated component factory, which is convenient for the transportation and on-site construction of the crossbeam, and avoids the traditional process of preparing the crossbeam by pouring on-site, including temporary support and high-altitude pumping concrete to prepare the crossbeam on-site. Therefore, compared with the traditional method, the scheme of this embodiment solves the problem of high-position concrete pumping and support system in traditional bridge construction, significantly improves construction efficiency and safety, and significantly reduces the demand for labor, which is more conducive to speeding up the construction progress and reducing construction costs.

[0056] Specifically, Figure 1 As shown, the beam unit 1 in this embodiment is formed by dividing the beam body into sections along the length direction of the beam to form a plurality of beam units 1. Both ends of the beam as a whole are respectively connected with connecting ends, including a first connecting end and a second connecting end. The lengths of the beam unit 1 and the connecting ends are the same, but may also be different. This embodiment is described by taking the same length as an example, and the length may be but is not limited to 3-5m.

[0057] The cross beam unit 1 in this embodiment is a hollow column, and its length is not fixed, it can be long or relatively short, and the cross section of the column is in the shape of a Chinese character "U". The cross beam unit 1 in this embodiment and the connecting end assembly are both made of reinforced concrete or steel shell concrete, and the cross beam unit 1 and the connecting end assembly are both formed by a hollow "U"-shaped cross section column structure.

[0058] The beam unit 1 and the connecting end assembly each have two opposite connecting surfaces for connecting adjacent beam units 1 or connecting end members. In order to ensure that the beam unit 1 and the connecting end assembly have high structural accuracy, small errors, and smooth connecting surfaces, the two connected structural members can be closely attached to facilitate the compression and fixation of multiple beam units 1 and connecting end assemblies by the tower limb 6, in this embodiment, a virtual structural model is obtained by performing point cloud scanning on the prefabricated beam unit 1 and the connecting end assembly, and then the virtual structural model is used in combination with the virtual pre-assembly method for virtual assembly, and the smoothness of the connecting surface and the structural accuracy of the beam unit 1 and the connecting end assembly are verified based on the virtual assembly results. The assembly results include whether the connection positions between the beam units 1 and the beam units 1, and between the beam units 1 and the corresponding connecting end members are aligned, that is, whether all the connection positions are flush, the specific difference, whether there is a gap between the connections, the size of the gap, etc. When it is determined based on the virtual assembly results that the connection effect meets the requirements, it can be determined that the smoothness of the connection surface and the structural accuracy of the beam unit 1 and the connection end component meet the requirements. In this state, the connection position error of the beam unit 1 and the connection end component is at least not greater than 0.5mm.

[0059] By inspecting the prefabricated components through point cloud scanning and virtual pre-assembly technology, it can be ensured that the prefabricated components that have passed the inspection have excellent dimensional accuracy, structural accuracy, and connection surface smoothness, and can meet higher requirements. In addition, the connection positions between adjacent beam units 1 and connection end components are fixed, and the horizontality and flatness of the prefabricated beams formed after connection meet the application requirements. The above method adopted in this embodiment not only improves the quality of structural molding, but also reduces the possibility of construction being affected by structural errors during on-site construction, ensuring that the prefabricated beams can be successfully assembled and applied during on-site construction.

[0060] Further, such as Figure 2 The prefabricated connection assembly described in this embodiment includes multiple sets of steel brackets 4, which can be used for subsequent internal bolt connection. The side surface of each steel bracket 4 is provided with stud connectors, such as all welded stud connectors. The connection between two adjacent beam units 1, or between a beam unit 1 and a connection end assembly is achieved through the matching connection between bolts and stud connectors.

[0061] Combination Figure 3 As shown, the beam unit 1 and the connecting end assembly are provided with multiple groups of prestressed tendons, which are used to enhance the overall strength of the beam and can be aligned for stress adjustment. The prestressed tendons are bent, including a horizontal section and vertical sections located at both ends of the horizontal section. The two vertical sections are respectively connected to the two ends of the horizontal section and are located on the same side of the horizontal section. The horizontal section is inserted into the prefabricated beam composed of the beam body and the connecting end assembly, and the two vertical sections are respectively extended into the tower limbs 6 of the bridge tower located at both ends of the prefabricated beam.

[0062] The specific number of prestressed steel bars 5 is not fixed, and they can be set on one side of the prefabricated beam, such as on the upper side of the prefabricated beam, or on the lower side of the prefabricated beam, or on both the upper and lower sides of the prefabricated beam. The specific setting form is not fixed and can be comprehensively determined based on the actual stress conditions of the entire beam.

[0063] In practical application, the first connecting end member 2 and the second connecting end member 3 in the connecting end assembly can be set as a structure with a chamfered corner, and its longitudinal section is approximately trapezoidal. The length of each beam unit 1 and the first connecting end and the second connecting end is 3m-5m, and the specific length is not fixed, and can also be set to a longer structure, or set to be shorter, such as 2m. And as mentioned above, the length of each beam unit 1 and the connecting end member can be the same or different.

[0064] Based on the contents of the above embodiments, it can be known that the prefabricated overall structure of the beam has multiple safety protection structures, including the use of embedded steel brackets 4 and bolts to connect adjacent structural members, and multi-layer protection of prestressed steel bars 5 arranged inside, which provides strong protection for the overall structural stability and structural strength of the beam, and at the same time provides extremely high safety for the on-site construction process and the subsequent use of the bridge tower, ensuring the stability and durability of the structure during construction and operation.

[0065] Another embodiment of the present invention also provides a method for using a bridge tower crossbeam, comprising:

[0066] Prefabricated connection end assembly and a plurality of cross beam units, the connection end assembly comprises a first connection end member and a second connection end member, the cross beam unit and the connection end assembly are both hollow;

[0067] Verify the prefabrication accuracy and connection surface smoothness of the beam unit and the connection end assembly by point cloud scanning method and virtual pre-assembly method, wherein the connection surface is the surface of the beam unit and the connection end member used to connect with the adjacent beam unit and the connection end member;

[0068] A connection component is pre-embedded on the beam unit and the connection end component;

[0069] Installing integral steel hoops on two tower limbs that are arranged opposite to each other, and using the steel hoops to push the two tower limbs in relatively distant directions, so that the two tower limbs are relatively far away from each other and the distance between them is increased;

[0070] Arrange the plurality of prefabricated beam units into a straight line, and place the first connecting end member and the second connecting end member at both ends of the plurality of beam units arranged in the straight line, respectively, to form a prefabricated beam;

[0071] Using a hoisting device to hoist the prefabricated cross beam between the two tower limbs, removing the external force applied to the two tower limbs, causing the two tower limbs to reset, thereby pressing and fixing the prefabricated cross beam, so that the prefabricated cross beam is limited between the two tower limbs;

[0072] Entering the interior of the prefabricated crossbeam to fix and connect two adjacent crossbeam units and the connecting components between the crossbeam units and the connecting end members;

[0073] Removing the connection between the prefabricated beam and the lifting equipment;

[0074] Prestress is applied to the prefabricated cross beams and tower limbs.

[0075] In one embodiment, the step of applying prestress to the prefabricated beams and tower legs comprises:

[0076] Continuously applying prestress in the initial state to the prefabricated cross beam and the tower limb to ensure that the compression force inside the prefabricated cross beam and between the prefabricated cross beam and the tower limb is stable;

[0077] Prestressed steel bars are inserted into the prefabricated cross beams and tower limbs. The prestressed steel bars include a horizontal section and two vertical sections formed by both ends of the horizontal section extending upward or downward. The horizontal section passes through the prefabricated cross beam, and the two vertical sections extend into corresponding tower limbs respectively.

[0078] In one embodiment, the tower limbs are precast by casting using micro-expansive concrete, and the cast tower limbs are applied to the construction site after being cured until the strength reaches 90% of the maximum strength of the material. That is, the tower limbs in this embodiment are also precast parts, which can be transported to the construction site for use after casting and curing to determine that the overall strength meets the application requirements of the tower bridge.

[0079] Specifically, in actual application, after determining the required size of the bridge tower crossbeam as a whole in the prefabricated component factory, it can be segmented along the length direction, and then the crossbeam units and connecting end members can be prefabricated based on the segmented size, or the bridge tower crossbeam can be prefabricated as a whole, and then the crossbeam as a whole can be cut to obtain multiple crossbeam units and connecting end members. The bridge tower crossbeam, each crossbeam unit, and the connecting end member are prepared and formed by reinforced concrete or steel shell concrete, which are hollow columns with a U-shaped cross section. The length of each crossbeam unit and connecting end member is 3m-5m, and the connecting end member is a chamfered structure with a trapezoidal longitudinal section. The overall structure is approximately trumpet-shaped, the inside is hollow, and the cross section is also U-shaped.

[0080] The prefabricated beam units and connecting end components are scanned by point cloud to obtain a scanned model, which is then assembled using the scanned model combined with the virtual pre-assembly method to obtain a virtual bridge tower beam. By analyzing and observing the virtual bridge tower beam, the overall structural prefabrication accuracy of the beam units and connecting end components, as well as the smoothness of the connecting surfaces between the beam units and connecting end components, is verified to determine whether the connection position error is within 0.5 mm. Once the verification is passed, the connection components can be assembled.

[0081] Multiple sets of steel brackets are embedded inside the beam units and the connecting end members, and the side surfaces of the steel brackets are all welded with stud connectors.

[0082] The tower limbs and the overall structure of the bridge tower can be prefabricated in a prefabricated component factory. For example, they can be prefabricated by casting micro-expansive concrete. Then, the cast tower limbs are cured until the strength reaches 90% of the maximum strength of the material, and then transported to the construction site for installation and application. Among them, the tower limbs and the overall structure of the bridge tower can be prefabricated in sections and then assembled at the construction site.

[0083] During on-site construction, the beam units and connecting end components can be initially positioned so that multiple beam units are arranged in a straight line. Two connecting end components are placed at both ends of the straight beam unit to form a prefabricated beam. Then, the tower limbs are assembled and positioned. If the tower limbs are integral components, the assembly step can be ignored. Figure 4 As shown, the two tower limbs are pushed / pulled to both sides so that the tower limbs are deformed laterally at the assembly position of the beam, so that the distance between the two tower limbs becomes larger, and then the prefabricated beam as a whole, or each beam unit and connecting end member in the prefabricated beam is lifted to the corresponding height between the two tower limbs by one or more lifting equipment. At this time, the lateral push / pull force of the bridge tower is released to cause the two tower limbs to return to the initial state, and then the prefabricated beam is clamped and fixed, and the preliminary positioning of the beam and tower limb is completed. When the bridge tower is pushed sideways and deformed, an integral steel hoop can be installed at a higher position of the two tower limbs to wrap the tower limb, and then a jack is used between the hoop to push the hoop to achieve force on the tower limb, or the hoop is connected to the outer pile body by a cable, so that the tower limb is tensioned and forced to cause the tower limb to tilt and shift sideways.

[0084] After the initial positioning and preloading, the hoisting equipment connecting the prefabricated beams is not removed temporarily, but the hoisting equipment is allowed to continue to apply force. During this period, the construction personnel enter the manhole inside the prefabricated beam from the construction elevator to connect the steel brackets between the segments. The connecting end member at the end is connected to the extended steel bracket set on the corresponding beam unit. The connection process is constructed with high-strength bolts. When all the steel brackets are connected, the hoisting equipment is removed.

[0085] Next, use prestressing force to adjust the stress of the beams and tower limbs to ensure that the beams are tightly connected, and provide prestressing force in the initial state to the beams and tower limbs so that they continue to have this prestressing force to prevent the segments from detaching during subsequent operations and affecting the stress and stability of the bridge towers. Specifically, as shown in the figure, the prestressed steel bars are bent into the state shown in the figure and then installed in the beams and tower limbs. The prestressed steel bars can be arranged in the upper side or lower side of the beam. Either one of them can be arranged, or both can be arranged. The prestressed steel bar structures of the upper and lower sides can be the same or different. For example, the bending types of the prestressed steel bars are different, including different bending angles and different bending section lengths, etc., to effectively ensure the integrity between the beam and the bridge tower and improve the connection strength.

[0086] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A high-position large-volume bridge tower beam, characterized in that: include: A beam body, comprising a plurality of beam units; The connecting end components are respectively connected to the two ends of the cross beam body and abut against the corresponding tower limbs of the bridge tower to fix the cross beam body and the connecting end components between the opposite tower limbs; A connecting component, pre-buried in the beam unit and the connecting end component, used to connect two adjacent beam units, and to connect the beam unit and the connecting end component; Wherein, the cross beam unit and the connection end assembly are prefabricated components, and the surface used for connecting another cross beam unit is a smooth plane.

2. The high-position large-volume bridge tower crossbeam according to claim 1 is characterized in that: The crossbeam unit is a hollow column.

3. The high-position large-volume bridge tower cross beam according to claim 1 is characterized in that: The cross section of the beam unit is in the shape of a Chinese character U.S.

4. The high-position large-volume bridge tower cross beam according to claim 1 is characterized in that: The beam unit and the connecting end assembly each have two opposite connecting surfaces, and the connecting surfaces are verified by performing point cloud scanning on the prefabricated beam unit and the connecting end assembly and combining the virtual pre-assembly method to verify the smoothness and the structural accuracy of the beam unit and the connecting end assembly. When the smoothness and structural accuracy meet the requirements, the connection position error of the beam unit and the connecting end assembly is at least not greater than 0.5mm.

5. The high-position large-volume bridge tower cross beam according to claim 1, characterized in that: The prefabricated connection assembly includes multiple groups of steel brackets, and the side surface of each steel bracket is provided with a bolt connector. Two adjacent beam units, or a beam unit and a connection end assembly are connected by bolts or bolt connectors.

6. The high-position large-volume bridge tower cross beam according to claim 1, characterized in that: A plurality of groups of prestressed tendons are arranged in the crossbeam unit and the connecting end assembly. The prestressed tendons are bent and include a horizontal section and vertical sections located at both ends of the horizontal section. The horizontal section is located in the crossbeam body and the connecting end assembly, and the two vertical sections extend into corresponding bridge tower limbs respectively.

7. The high-position and large-volume bridge tower cross beam according to claim 1 is characterized in that: The connecting end assembly comprises a first connecting end member and a second connecting end member, and the length of each of the beam units and the first connecting end and the second connecting end is 3m-5m.

8. A method for using a bridge tower beam, characterized in that: include: Prefabricated connection end assembly and a plurality of cross beam units, the connection end assembly comprises a first connection end member and a second connection end member, the cross beam unit and the connection end assembly are both hollow; Verify the prefabrication accuracy and connection surface smoothness of the beam unit and the connection end assembly by point cloud scanning method and virtual pre-assembly method, wherein the connection surface is the surface of the beam unit and the connection end member used to connect with the adjacent beam unit and the connection end member; A connection component is pre-embedded on the beam unit and the connection end component; Installing integral steel hoops on two tower limbs that are arranged opposite to each other, and using the steel hoops to push the two tower limbs in relatively distant directions, so that the two tower limbs are relatively far away from each other and the distance between them is increased; Arrange the plurality of prefabricated beam units into a straight line, and place the first connecting end member and the second connecting end member at both ends of the plurality of beam units arranged in the straight line, respectively, to form a prefabricated beam; Using a hoisting device to hoist the prefabricated cross beam between the two tower limbs, removing the external force applied to the two tower limbs, causing the two tower limbs to reset, thereby pressing and fixing the prefabricated cross beam, so that the prefabricated cross beam is limited between the two tower limbs; Entering the interior of the prefabricated crossbeam to fix and connect two adjacent crossbeam units and the connecting components between the crossbeam units and the connecting end members; Removing the connection between the prefabricated beam and the lifting equipment; Prestress is applied to the prefabricated cross beams and tower limbs.

9. The method for using the bridge tower crossbeam according to claim 8, characterized in that: The step of applying prestress to the prefabricated beams and tower limbs comprises: Continuously applying prestress in the initial state to the prefabricated cross beam and the tower limb to ensure that the compression force inside the prefabricated cross beam and between the prefabricated cross beam and the tower limb is stable; Prestressed steel bars are inserted into the prefabricated cross beams and tower limbs. The prestressed steel bars include a horizontal section and two vertical sections formed by both ends of the horizontal section extending upward or downward. The horizontal section passes through the prefabricated cross beam, and the two vertical sections extend into corresponding tower limbs respectively.

10. The method for using the bridge tower crossbeam according to claim 8, characterized in that: The tower limbs are prefabricated by casting using micro-expansive concrete, and the cast tower limbs are used on the construction site after being cured until their strength reaches 90% of the maximum strength value of the material.

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