Construction method of viaduct

Abstract

The application provides a construction method of an elevated bridge, which comprises the following steps: assembling steel box beams in a preset size through transverse bridge construction, splicing the assembled steel box beams to form each segment of the elevated bridge through longitudinal bridge construction, and finally splicing each segment to form a complete elevated bridge. When the longitudinal bridge construction is performed, the ground is leveled first, and then a plurality of temporary supports are erected at the positions adjacent to the bridge piers along the longitudinal bridge; then the assembled steel box beams are hoisted by hoisting equipment, and the steel box beams are sequentially assembled to form segments with a preset length; finally, the hoisting equipment is used to install cantilever arms at both ends of each segment and weld the cantilever arms between the two adjacent segments to form the bridge deck of the complete elevated bridge. The construction method is suitable for complex construction conditions, and greatly improves the construction efficiency of the elevated bridge.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of building technology, and particularly relates to a construction method of a viaduct. BACKGROUND

[0002] The proposed Guitian No.1 Road viaduct is located in the south-north direction of the existing Guitian No.1 Road, and passes under the Changfeng Expressway viaduct along the Guitian No.1 Road. The pier column adopts a vase pier, the foundation is a double-pile pile cap foundation, the pile foundation is a rock-embedded pile, and the upper structure is a steel box girder structure. The Guitian No.1 Road and the Changfeng Expressway viaduct are provided with two interchanges, namely interchange A and interchange B. The pier column adopts a vase pier, the foundation is a double-pile pile cap foundation, the pile foundation is a rock-embedded pile, and the upper structure adopts a concrete box girder and a steel box girder. The concrete box girder is constructed by the support cast-in-place method. The Guitian No.1 Road main line bridge under the Changfeng Expressway viaduct is orthogonal to the Changfeng Expressway viaduct. The minimum net height between the Guitian No.1 Road and the ground is 4.5 meters, and the minimum net height between the Guitian No.1 Road and the Changfeng Expressway viaduct is 3.5 meters. The main structure of the steel box girder adopts the bridge structural steel Q345qC which meets the requirements of GB / T714-2015.

[0003] That is, the entire construction includes main line construction and ramps, involves a wide range of lines, and the complex construction conditions greatly increase the construction difficulty.

[0004] Therefore, how to provide a construction scheme capable of adapting to complex construction conditions to improve the construction efficiency is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The present application provides a construction method of a viaduct to at least solve the above technical problems.

[0006] In order to solve the above problems, the first aspect of the present application provides a construction method of a viaduct, which is used for assembling a plurality of segments composed of a steel box girder to form the viaduct. The construction method comprises: performing transverse bridge construction; the transverse bridge construction comprises: assembling a plurality of beam pieces by using hoisting equipment to obtain a steel box girder with a predetermined size; performing longitudinal bridge construction; the longitudinal bridge construction comprises: leveling the site, and building a plurality of temporary supports at the adjacent positions of the bridge piers along the longitudinal direction; hoisting the steel box girder onto the temporary supports by using the hoisting equipment; assembling the hoisted steel box girder by using the hoisting equipment to form a segment with a predetermined length; performing arm picking installation at both ends of each segment by using the hoisting equipment; welding the installed arms between two adjacent segments to form the bridge deck of the complete viaduct; and removing the temporary supports.

[0007] In the first aspect, after the steel box girder is hoisted onto the temporary support by the hoisting device, the construction method further comprises: pushing the steel box girder by a pushing device to displace the steel box girder in the longitudinal direction, so that several steel box girders are assembled into the segment of the preset length.

[0008] In the first aspect, the pushing device comprises a vertical jack and a horizontal jack, and the pushing of the steel box girder by the pushing device to displace the steel box girder in the longitudinal direction so that several steel box girders are assembled into the segment of the preset length comprises: arranging the vertical jack and the horizontal jack on the temporary support; vertically jacking the steel box girder at the current position by the vertical jack; horizontally pushing the steel box girder at the current position to the preset stroke by the horizontal jack; repeating the vertical jacking and the horizontal pushing to push several steel box girders at the current position to the preset stroke to assemble into the segment of the preset length.

[0009] In the first aspect, the pushing device further comprises a sensor assembly and a main controller in communication connection; the vertical jacking by the vertical jack comprises: the main controller acquires first position information of the steel box girder by the sensor assembly, and controls the vertical jack to perform the vertical jacking according to the first position information, and controls the vertical jack to stop the vertical jacking when the main controller acquires that the steel box girder is jacked to a preset second position; and the horizontal pushing by the horizontal jack comprises: the main controller controls the horizontal jack to perform the horizontal pushing according to the second position information, and controls the horizontal jack to stop the horizontal pushing and resets the vertical jack when the main controller acquires that the steel box girder is horizontally displaced to a preset third position.

[0010] In the first aspect, the sensor assembly comprises a first pressure sensor, a first displacement sensor and a first angle sensor, and when the vertical jacking by the vertical jack is performed, the method further comprises: acquiring jacking or descending load data of the vertical jack by the first pressure sensor; acquiring jacking stroke data of the vertical jack by the first displacement sensor; and acquiring a jacking state of the vertical jack according to the jacking or descending load data and the jacking stroke data.

[0011] In the first aspect, the sensor assembly further comprises a first angle sensor arranged on the steel box girder, and the vertical jacking action by the vertical jacks further comprises: acquiring first angle information of the steel box girder by the first angle sensor; determining whether the posture of the steel box girder deviates when the vertical jacks vertically jack up the steel box girder according to the first angle information; and stopping the vertical jacking action by the vertical jacks if the posture of the steel box girder deviates.

[0012] In the first aspect, the sensor assembly comprises a second pressure sensor, a second displacement sensor and a second angle sensor, and the horizontal jacking action by the horizontal jacks further comprises: acquiring horizontal state load data of the horizontal jacks by the second pressure sensor; acquiring horizontal stroke data of the horizontal jacks by the second displacement sensor; and acquiring jacking state of the horizontal stroke data according to the horizontal state load data and the horizontal stroke data.

[0013] In the first aspect, the sensor assembly further comprises a second angle sensor arranged on the steel box girder, and the horizontal jacking action by the horizontal jacks further comprises: acquiring second angle information of the steel box girder by the second angle sensor; determining whether the posture of the steel box girder deviates when the horizontal jacks horizontally jack up the steel box girder according to the second angle information; and stopping the vertical jacking action by the vertical jacks if the posture of the steel box girder deviates.

[0014] In the second aspect, the present application provides a construction method of a viaduct, which is used for assembling a plurality of segments composed of steel box girders to form the viaduct, and the construction method comprises: performing transverse bridge construction; the transverse bridge construction comprises: assembling a plurality of beam pieces by using hoisting equipment to obtain a steel box girder with a preset size; performing longitudinal bridge construction; the longitudinal bridge construction comprises: leveling the site, and presetting the installation position of each temporary support at the adjacent position of the bridge pier along the longitudinal bridge; forming a splicing unit by corresponding one of the temporary supports to one of the steel box girders; hoisting a plurality of the splicing units in sequence according to the order by using the hoisting equipment, so that each of the splicing units is hoisted to the corresponding preset installation position; assembling the steel box girders in the splicing units that have been hoisted by using the hoisting equipment to form the segments with a preset length; performing cantilever installation at both ends of each of the segments by using the hoisting equipment; welding the cantilevers installed between the adjacent two segments to form the bridge deck of the complete viaduct; and removing the temporary supports.

[0015] In the second aspect, the assembling of the plurality of beam pieces by the hoisting device to obtain the steel box girder with the preset size comprises: sequentially hoisting the plurality of beam pieces by the truck crane to splice the steel box girder with the preset size.

[0016] Beneficial effects: the construction method of the viaduct is provided, the steel box girder is assembled with the preset size by the transverse bridge construction, the assembled steel box girder is spliced to form each segment of the viaduct by the longitudinal bridge construction, and finally each segment is spliced to form the complete bridge deck of the viaduct. When the longitudinal bridge construction is performed, the ground is leveled, and a plurality of temporary supports are erected at the adjacent positions of the bridge piers along the longitudinal bridge. Then the assembled steel box girder is hoisted by the hoisting device, and the plurality of steel box girders are sequentially assembled to form the segment with the preset length. Finally, the hoisting device is used to install the cantilever at both ends of each segment and weld the cantilevers between the adjacent two segments to form the bridge deck of the complete viaduct. The construction method is suitable for complex construction conditions, and greatly improves the construction efficiency of the viaduct. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 the flowchart of the construction method of the viaduct in the first embodiment of the present application; DETAILED DESCRIPTION

[0019] The technical solutions in the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0020] Meanwhile, in the embodiments of the present specification, when a component is referred to as "fixed to" another component, it can be directly on the other component or there can be a middle component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a middle component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there can be a middle component. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present specification are only for illustrative purposes, and are not intended to limit the present application.

[0021] Embodiment one:

[0022] As Figure 1 The embodiment one provides a construction method of a viaduct, the construction method is used for assembling a plurality of segments composed of steel box girders to form the viaduct, and the construction method comprises: performing transverse bridge construction; the transverse bridge construction comprises: assembling a steel box girder of a preset size by using hoisting equipment; performing longitudinal bridge construction; the longitudinal bridge construction comprises: leveling a site, erecting a plurality of temporary supports at positions adjacent to piers along a line in the longitudinal direction, hoisting the assembled steel box girder by using the hoisting equipment, sequentially assembling a plurality of steel box girders by using the hoisting equipment to form a segment of a preset length, installing cantilever arms at both ends of each segment by using the hoisting equipment, welding the cantilever arms between adjacent two segments in segments of different lengths to form a bridge deck of the complete viaduct, and removing the temporary supports.

[0023] Specifically, the embodiment one provides a construction method of a viaduct, the steel box girders are assembled to a preset size by transverse bridge construction, the assembled steel box girders are spliced to form various segments of the viaduct by longitudinal bridge construction, and finally the various segments are spliced to form the complete viaduct. When the longitudinal bridge construction is performed, the site is leveled first, a plurality of temporary supports are erected at positions adjacent to piers along a line in the longitudinal direction, then the assembled steel box girders are hoisted by using hoisting equipment, a plurality of steel box girders are sequentially assembled to form a segment of a preset length, finally cantilever arms are installed at both ends of each segment by using the hoisting equipment, and the cantilever arms between adjacent two segments are welded to form a bridge deck of the complete viaduct. The construction method is suitable for complex construction conditions, and greatly improves the construction efficiency of the viaduct.

[0024] In some possible embodiments, after the assembled steel box girders are hoisted by using the hoisting equipment, the construction method further comprises: pushing the steel box girders by using pushing equipment to displace the steel box girders in the longitudinal direction, so that the plurality of steel box girders are assembled into segments of a preset length.

[0025] For the above embodiment one, after the assembled steel box girders are hoisted by using the hoisting equipment, the steel box girders are pushed by using the pushing equipment, the embodiment one provides a specific construction method of an L2 main line: the L2 main line is divided into 20 segments in the longitudinal direction, wherein segments 6-10 are pushing segments, segments 5-1 and segments 11-20 are hoisting segments. After the pushing is completed, the pushing supports are removed, and the supports are rearranged, and then the segments 5-1 and the segments 11-20 are installed by using the truck crane. After all the box chamber segments are installed, the cantilever arm segments are installed by using the 50t truck crane. The total length of the pushing segments is 49m, and the weight is about 550t. It should be noted that the pushing equipment in the embodiment one can adopt a walking machine. The construction steps are as follows:

[0026] Step 1, site leveling, hardening, and then starting to set up temporary support and install the pushing device:

[0027] Step 2, use 350T truck crane (with weight 107 tons) to hoist segments 6~segment 10 on the left side of the box girder, and the segment weight is 30.7~41.38 tons. When the truck crane arm is 26 meters long and the working radius is 16 meters, the maximum weight of the segment is 41.38 tons, and the rated lifting weight is 64 tons. It meets the lifting requirements.

[0028] Use 350T truck crane (with weight 107 tons) to hoist the right side of the arm, and the truck crane arm is 26 meters long, and the maximum working radius is 20 meters, and the segment weight is 14 tons, and the rated lifting weight is 48 tons. It meets the lifting requirements.

[0029] Use 50T truck crane to assemble the left side of the arm, the lifting arm is 18.8 meters long, the working radius is 7 meters, the maximum weight of the segment is 14 tons, and the rated lifting weight is 23 tons, which meets the lifting requirements.

[0030] Step 3, the walking machine jacks up the steel beam, and pushes 11m from the large mileage to the small mileage direction, at this time the tail end will be separated from the D1 pushing pier, and the main beam has a maximum cantilever of 21m;

[0031] Step 4, the walking machine continues to push forward 19m, and the guide beam will be on one of the temporary piers, and the guide beam and the front segment of the main beam have a cantilever of 30m;

[0032] Step 5, the walking machine continues to push forward 24m, and the steel beam will be on one of the temporary piers;

[0033] Step 6, after the main beam is completely on one of the temporary piers, the guide beam is removed;

[0034] Step 7, the walking machine continues to push forward 16m, and the steel beam is pushed into place, and the beam is completed;

[0035] For the pushing device, the first embodiment can preferably be a vertical jack and a horizontal jack, and for the step of pushing the steel box girder using the pushing device, the first embodiment proposes an implementation: setting a vertical jack and a horizontal jack on a plurality of temporary supports; through the vertical jack, a vertical jacking action is generated to vertically jack up the steel box girder at the current position; through the horizontal jack, a horizontal pushing action is generated to horizontally push the steel box girder at the current position to a preset stroke; repeat the vertical jacking action and the horizontal jacking action to push a plurality of steel box girders at the current position to a preset stroke to assemble a segment of a preset length.

[0036] Further, for the pushing device, the first embodiment can also preferably be a sensor assembly and a main controller in communication connection; for the step of vertically jacking by the vertical jack, the first embodiment proposes an implementation: the main controller acquires first position information of the steel box girder through the sensor assembly, and controls the vertical jack to jack vertically according to the first position information, and when the main controller acquires that the steel box girder is jacked to a preset second position, controls the vertical jack to stop jacking vertically; the horizontal jacking by the horizontal jack includes: the main controller controls the horizontal jack to jacking horizontally according to second position information, and when the main controller acquires that the steel box girder is horizontally displaced to a preset third position, controls the horizontal jack to stop jacking horizontally and resets the vertical jack.

[0037] In some possible implementations, the sensor assembly includes a first pressure sensor, a first displacement sensor and a first angle sensor, and when the vertical jacking by the vertical jack is performed, the method further includes: acquiring jacking or lowering load data of the vertical jack by the first pressure sensor; acquiring jacking stroke data of the vertical jack by the first displacement sensor; and acquiring a jacking state of the vertical jack according to the jacking or lowering load data and the jacking stroke data.

[0038] This is to prevent the vertical jack from being damaged during use, so that the jacking power is lost, and the steel box girder cannot be jacked to a preset height. Therefore, the first pressure sensor is used to detect the load of the vertical jack, and the first displacement sensor is used to detect the jacking stroke of the vertical jack, so as to determine whether the vertical jack is in a normal working state.

[0039] In some possible implementations, the sensor assembly further includes a first angle sensor arranged on the steel box girder, and the vertical jacking by the vertical jack further includes: acquiring first angle information of the steel box girder by the first angle sensor, and determining whether the posture of the steel box girder is deviated when the vertical jack jacks the steel box girder vertically according to the first angle information.

[0040] This is to prevent the posture of the steel box girder from being deviated when the steel box girder is jacked. Therefore, the first angle sensor is used to monitor the angle of the steel box girder when jacked, and when the steel box girder is found to be deviated, the jacking is immediately stopped, and the posture of the steel box girder is corrected.

[0041] In some possible implementation manners, the sensor assembly comprises a second pressure sensor, a second displacement sensor and a second angle sensor, and when the horizontal jacking action is performed by the horizontal jacks, the method further comprises: acquiring load data of the horizontal state of the horizontal jacks by the second pressure sensor; acquiring horizontal displacement data of the horizontal jacks by the second displacement sensor; and determining the jacking state of the horizontal displacement data according to the load data of the horizontal state and the horizontal displacement data.

[0042] This is to prevent the horizontal jacks from being damaged during use, so that the power of the horizontal jacking is lost, and the steel box girder cannot be jacked to the preset horizontal position. Therefore, the load of the horizontal jacks is detected by the second pressure sensor, and the horizontal displacement of the horizontal jacks is detected by the second displacement sensor, so as to determine whether the horizontal jacks are in a normal working state.

[0043] In some possible implementation manners, the sensor assembly further comprises a second angle sensor arranged on the steel box girder, and when the horizontal jacking action is performed by the horizontal jacks, the method further comprises: acquiring second angle information of the steel box girder by the second angle sensor, and determining whether the posture of the steel box girder is deviated when the horizontal jacks perform the horizontal jacking action according to the second angle information.

[0044] This is to prevent the steel box girder from being deviated when jacked. Therefore, the angle of the steel box girder during the horizontal jacking is monitored by the second angle sensor. When the steel box girder is deviated, the jacking action needs to be stopped immediately, and the posture of the steel box girder is corrected.

[0045] In some possible implementation manners, the longitudinal construction further comprises: leveling the site, and planning the installation position of each temporary support; lifting one of the temporary supports to the installation position by the lifting equipment to generate step one; lifting the steel box girder of one of the segments to one of the temporary supports by the lifting equipment to generate step two; and repeating steps one and two to complete the assembly of all segments.

[0046] For the above steps of longitudinal construction, the first embodiment proposes a specific construction method taking the ramp B1 connection line as an example:

[0047] Step 1: Level the site and plan the position of each support.

[0048] Step 2: A 220T truck crane (with a weight of 70 tons) is used to arrange the support Z1 on one side of the pier, and then the three beams of the segment 1 are assembled from left to right in sequence, with an arm length of 26.8 meters, a working radius of 12 meters, a segment weight of 32.09 tons, and a rated lifting weight of 56 tons, which meets the lifting requirements.

[0049] Step 3: A 220T automobile crane (with a weight of 70 tons) is used to arrange a support Z2 on the other side of the pier, and then three beams of the segment 2 are assembled from left to right in sequence, with an arm length of 26.8 meters, a working radius of 15 meters, a segment weight of 32.8 tons, and a rated hoisting weight of 41.5 tons, meeting the hoisting requirements.

[0050] Step 4: A 220T automobile crane (with a weight of 70 tons) is used to repeat steps 2 and 3, and a segment is assembled after a group of supports are installed, with an automobile crane arm length of 26.8 meters, a working maximum radius of 15 meters, a maximum segment weight of 33.1 tons, and a rated hoisting weight of 41.5 tons, meeting the hoisting requirements.

[0051] Step 5: Finally, welding is performed, and the supports are removed after inspection and qualification.

[0052] Embodiment Two

[0053] Embodiment Two of the present application provides a construction system of a viaduct, which is applied to the construction method of the viaduct in any one of the above, to complete the construction of the viaduct through the transverse bridge construction and longitudinal construction of the construction method, and the construction method is suitable for complex construction conditions, greatly improving the construction efficiency of the viaduct.

[0054] Since Embodiment Two and Embodiment One are one embodiment under the same inventive concept, and some structures are completely the same, the structures in Embodiment Two that are substantially the same as those in Embodiment One will not be described in detail, and the parts not described in detail can be referred to Embodiment One.

[0055] Finally, it should be noted that the above embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and the protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can make modifications or easily think of changes to the technical solutions recorded in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacements to some technical features; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. They should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0056] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and embodiments, and can be fully applied to various fields suitable for the present application. Those skilled in the art can easily make further modifications, and therefore the present application is not limited to specific details and figures shown and described herein, without departing from the general concept defined by the claims and equivalent scope.

Claims

1. A construction method of an elevated bridge for assembling a plurality of segments consisting of steel box girders to form the elevated bridge, characterized in that, The construction method comprises: carrying out transverse bridge construction; the transverse bridge construction comprises: assembling a plurality of beam pieces by using hoisting equipment to obtain a steel box girder with a preset size; carrying out longitudinal bridge construction; the longitudinal bridge construction comprises: leveling the site, and erecting a plurality of temporary supports at positions adjacent to bridge piers along the longitudinal bridge; hoisting the steel box girder onto the temporary supports by using hoisting equipment; assembling the steel box girder hoisted by using the hoisting equipment to form the segment with a preset length; carrying out cantilever installation at both ends of each segment by using hoisting equipment; welding the cantilevers installed between two adjacent segments to form the bridge deck of the complete viaduct; demolishing the temporary supports; after the steel box girder is hoisted onto the temporary supports by using the hoisting equipment, the construction method further comprises: carrying out push construction on the steel box girder by using pushing equipment to displace the steel box girder along the longitudinal bridge, so that a plurality of steel box girders are assembled into the segment with a preset length; the pushing equipment comprises vertical jacks and horizontal jacks, and the push construction on the steel box girder by using the pushing equipment to displace the steel box girder along the longitudinal bridge, so that a plurality of steel box girders are assembled into the segment with a preset length comprises: setting vertical jacks and horizontal jacks on a plurality of temporary supports; vertically jacking up the steel box girder at the current position by using the vertical jacks; horizontally pushing the steel box girder at the current position to a preset stroke by using the horizontal jacks; repeating the vertical jacking action and the horizontal jacking action to push a plurality of steel box girders at the current position to a preset stroke to assemble into the segment with a preset length; the pushing equipment further comprises a sensor assembly and a main controller in communication connection; and the vertical jacking action by using the vertical jacks comprises: the main controller acquires first position information of the steel box girder by using the sensor assembly, and controls the vertical jacks to perform the vertical jacking action according to the first position information; when the main controller acquires that the steel box girder is jacked up to a preset second position, the main controller controls the vertical jacks to stop the vertical jacking action; the horizontal pushing action by using the horizontal jacks comprises: the main controller controls the horizontal jacks to perform the horizontal pushing action according to second position information; when the main controller acquires that the steel box girder is horizontally displaced to a preset third position, the main controller controls the horizontal jacks to stop the horizontal pushing action and resets the horizontal jacks.

2. The method of constructing a bridge according to claim 1, wherein the sensor assembly includes a first pressure sensor, a first displacement sensor, and a first angle sensor. when the vertical jacking action by using the vertical jacks is performed, the method further comprises: acquiring jacking or lowering load data of the vertical jacks by using the first pressure sensor; acquiring jacking stroke data of the vertical jacks by using the first displacement sensor; acquiring a jacking state of the vertical jacks according to the jacking or lowering load data and the jacking stroke data.

3. The method of constructing an overhead bridge according to claim 1, wherein the sensor assembly further comprises a first angle sensor disposed on the steel box girder, and wherein the vertical jacking action by using the vertical jacks further comprises: The first angle sensor is used to acquire first angle information of the steel box girder, and the vertical jack is stopped from vertical jacking action when the posture of the steel box girder is deviated during vertical jacking of the steel box girder according to the first angle information.

4. The method of constructing an overpass of claim 1, the sensor assembly including a second pressure sensor, a second displacement sensor, and a second angle sensor, wherein, When the horizontal jacking action is performed by the horizontal jack, the method further comprises: The second pressure sensor is used to acquire load data of the horizontal state of the horizontal jack; The second displacement sensor is used to acquire horizontal stroke data of the horizontal jack; The jacking state of the horizontal stroke data is acquired according to the load data of the horizontal state and the horizontal stroke data.

5. The method of constructing a bridge as claimed in claim 1, wherein said sensor assembly further comprises a second angle sensor disposed on said steel box girder, and wherein, The horizontal jacking action performed by the horizontal jack further comprises: The second angle sensor is used to acquire second angle information of the steel box girder, and the horizontal jack is stopped from vertical jacking action when the posture of the steel box girder is deviated during horizontal jacking of the steel box girder according to the second angle information.

6. A construction method of an elevated bridge for assembling a plurality of segments consisting of steel box girders to form the elevated bridge, characterized in that, The construction method comprises: Transverse bridge construction is performed; the transverse bridge construction comprises: assembling a plurality of beam pieces by using hoisting equipment to obtain a steel box girder with a preset size; Longitudinal bridge construction is performed; the longitudinal bridge construction comprises: The ground is leveled, and the installation position of each temporary support is preset at the adjacent position of the pier along the longitudinal bridge; One temporary support corresponds to one steel box girder to form a splicing unit; The hoisting equipment is used to sequentially hoist a plurality of splicing units in order, so that each splicing unit is hoisted to the corresponding preset installation position; The hoisting equipment is used to assemble the steel box girder in the splicing unit that has been hoisted to form a segment with a preset length; The hoisting equipment is used to install the cantilever at both ends of each segment; The cantilevers installed between the adjacent two segments are welded to form the bridge deck of the viaduct; The temporary supports are removed.

7. The method of claim 6, wherein The hoisting equipment is used to assemble a plurality of beam pieces to obtain a steel box girder with a preset size, which comprises: The automobile hoist is used to sequentially hoist a plurality of beam pieces to splice and form a steel box girder with a preset size.

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