Full-height steel trestle and its construction method

Abstract

The present invention discloses a full-bridge steel trestle, which is used to connect various hydraulic structures in a port, including a steel pipe pile foundation, a lower crossbeam, a Bailey beam, an upper crossbeam, a bridge deck, an upper longitudinal beam, and a lower longitudinal beam. A pair of upper longitudinal beams and a pair of lower longitudinal beams extend synchronously along the extension direction of the steel trestle. A construction method for a full-bridge steel trestle includes the following steps: S1, the front end of the working platform is connected with a guide frame through an upper longitudinal beam and a lower longitudinal beam; S2, the guide frame is moved to a predetermined position in the installation stage, and the crawler crane hoists the steel pipe piles and positions them through the guide frame, and then the steel pipe piles are sunk and fixed; S3, the steel pipe piles of excess length are cut, and the distance between a pair of guide frames is controlled to expand to the minimum distance, and the guide frame is slid to separate from the steel pipe piles; S4, S2-S3 is repeated to complete the remaining stages of construction. The present invention has the beneficial effects of slidingly connecting and setting the steel trestle and the guide frame, weakening the disassembly and assembly procedures of the guide frame, and improving the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of port construction, and more specifically, to a full-bridge steel trestle and a construction method thereof. Background Art

[0002] Port hydraulic structures are an important part of the port, generally including breakwaters, pilot dikes, docks, and approach bridges connecting the pilot dikes and docks. Conventionally, the construction is carried out "mainly by water vessels, assisted by land equipment". However, for unprotected sea areas with long-period waves, long-period waves can cause ships to undergo large and violent movements, resulting in great safety hazards in water ship operations, that is, conventional construction plans are difficult to implement.

[0003] Nowadays, it is common to build a steel trestle as a temporary construction channel to change the water construction to land construction. The existing steel trestles use steel pipe piles as the basic support, and are equipped with Bailey beams, bridge decks, etc. During the steel pipe pile construction process, a guide frame is first set up. After the steel pipe piles are inserted, the operators cut the excess length of the steel pipe piles, weld the pile caps, and then remove the guide frame to install the auxiliary device. After the installation is completed, the guide frame is set up again for the next span installation. There is a problem that the guide frame needs to be disassembled and assembled many times, resulting in cumbersome construction. How to provide a steel trestle that matches the guide frame, weakens the guide frame disassembly and assembly procedures, and improves construction efficiency is a problem that needs to be solved urgently. Summary of the invention

[0004] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0005] Another object of the present invention is to provide a full-height steel trestle that matches a guide frame, weakens the guide frame disassembly and assembly procedures, and improves construction efficiency.

[0006] Another object of the present invention is to provide a construction method for a full-bridge steel trestle, which weakens the guide frame disassembly and assembly procedures and improves construction efficiency.

[0007] In order to achieve these purposes and other advantages according to the present invention, a full-bridge steel trestle is provided for connecting various hydraulic structures in a port, comprising a steel pipe pile foundation, a lower crossbeam arranged at the top of the steel pipe pile foundation, Bailey beams arranged at both ends of the lower crossbeam in the transverse direction, upper crossbeams arranged at intervals along the longitudinal direction of the Bailey beam, and a bridge deck laid on the top of the upper crossbeam, wherein:

[0008] A pair of upper longitudinal beams are arranged at intervals along the lateral direction on the bottom surface of the upper cross beam, and a pair of lower longitudinal beams are arranged at intervals along the lateral direction on the top surface of the lower cross beam. The pair of upper longitudinal beams and the pair of lower longitudinal beams extend synchronously along the extension direction of the steel trestle.

[0009] A construction method for a full-height steel trestle comprises the following steps:

[0010] S1. Use the completed stage of the steel trestle as the working platform, and install a crawler crane on it. Among them, the front end of the working platform is slidably and fixedly connected with a guiding frame through a pair of upper longitudinal beams and a pair of lower longitudinal beams. The guiding frame includes:

[0011] A sliding component, which is slidably and fixedly connected with a pair of upper longitudinal beams and a pair of lower longitudinal beams;

[0012] An extension component, which is fixedly connected with a pair of sliding components. The extension component includes multiple longitudinal beams arranged at intervals in the transverse direction and strengthening beams fixed between the multiple longitudinal beams;

[0013] A guiding component, which includes a pair of guiding frames that are slidably positioned at the front ends of the multiple longitudinal beams along the longitudinal direction of the steel trestle. Among them, the guiding frame has guiding holes. When the distance between the pair of guiding frames is extended to a predetermined distance, the pair of guiding holes form positioning and guiding for the steel pipe piles to be hoisted; when the distance between the pair of guiding frames is shortened to the minimum distance, the length of the guiding component in the width direction of the steel trestle is set so that it can freely pass through the middle space of the steel trestle;

[0014] S2. Move the guiding frame to the predetermined position in the stage to be installed. The sliding component is fixedly connected with a pair of upper longitudinal beams and a pair of lower longitudinal beams to position the guiding frame. Control to extend the distance between the pair of guiding frames to the predetermined distance. The crawler crane hoists the steel pipe pile and positions it through the guiding holes, and then sinks and fixes the steel pipe pile;

[0015] S3. Cut the steel pipe pile with the excess length. Control to extend the distance between the pair of guiding frames to the minimum distance. Remove the fixed connection between the sliding component and the pair of upper longitudinal beams and the pair of lower longitudinal beams to slide the guiding frame away from the steel pipe pile, and sequentially install the lower cross beam, Bailey beam, upper cross beam, bridge deck, and upper longitudinal beam and lower longitudinal beam;

[0016] S4. Repeat S2 - S3 to complete the construction of the remaining stages.

[0017] Preferably, the outer sides of the upper longitudinal beam and the lower longitudinal beam are both recessed with first chutes, and the bottom sides of the first chutes are recessed with second chutes;

[0018] The sliding component includes:

[0019] The lifting mechanism is a pair of sliding frames, wherein the pair of sliding frames are slidably connected to the upper longitudinal beam and the lower longitudinal beam on the same side respectively, and each sliding frame comprises a connecting frame, an upper sliding unit arranged at the top of the connecting frame, and a lower sliding unit arranged at the bottom of the connecting frame, and the lower sliding unit and the upper sliding unit corresponding to each connecting frame each comprise at least two arranged along the longitudinal interval, and each upper sliding unit and each lower sliding unit comprise a first pulley matched with the corresponding first slide groove, and a second pulley matched with the corresponding second slide groove, wherein at least two jacking mechanisms are fixedly connected to the lower side of the connecting frame along the longitudinal interval, the jacking mechanism is shortened so that the second pulley matches and slides in the second slide groove, and the jacking mechanism is extended so that the bottom end thereof abuts against the lower longitudinal beam, and drives the connecting frame to move upward so that the top end of the connecting frame abuts against the upper longitudinal beam;

[0020] At least two connecting rods are arranged at intervals along the same plane and both pass through a pair of connecting frames. The passing end of each connecting rod is fixed by a nut, and the longitudinal beam is fixedly connected to the connecting rod.

[0021] Preferably, there are four longitudinal beams, and the reinforcing beams and connecting rods are arranged at intervals along the longitudinal direction of the longitudinal beams.

[0022] Preferably, each guide frame comprises a pair of guide plates spaced apart from each other, and an upper guide hole and a lower guide hole coaxially arranged are provided through the pair of guide plates, and the upper guide hole and the lower guide hole constitute the guide hole;

[0023] Two sliding bars are arranged at intervals on each guide plate along the longitudinal direction of the longitudinal beam, each sliding bar is connected to the longitudinal beam in a transverse sliding manner, the longitudinal beam is clamped between the sliding bars corresponding to each guide frame, and the sliding bars corresponding to a pair of guide frames are staggered along the longitudinal direction of the longitudinal beam, wherein, when a pair of guide frames are extended to a predetermined distance and shortened to a minimum distance driven by the sliding bars, the sliding bars are detachably fixed to the longitudinal beam.

[0024] Preferably, it also includes:

[0025] An upper connecting plate, which is fixedly mounted on the top ends of the two longitudinal beams in the middle and is slidably connected to the sliding rods located below it;

[0026] The lower connecting plate is fixedly mounted on the bottom ends of the two longitudinal beams in the middle and is slidably connected with the sliding rods located above the lower connecting plate.

[0027] Preferably, a baffle is provided between a pair of guide plates and a side opposite to the longitudinal beam, a telescopic cylinder is provided on the longitudinal beam adjacent to the baffle, and an output end of the telescopic cylinder is connected to the baffle to drive the guide frame to move through the baffle.

[0028] Preferably, the connecting rod is fixedly passed through a plurality of longitudinal beams arranged at intervals.

[0029] The present invention has at least the following beneficial effects:

[0030] A sliding connection is provided for the steel trestle and the guiding frame, weakening the disassembly and assembly procedures of the guiding frame and improving the construction efficiency. Specifically:

[0031] Through the setting of the upper longitudinal beam and the lower longitudinal beam, the connection of the lower cross beam and the upper cross beam in the longitudinal direction is provided, improving the stability of the device. At the same time, in cooperation with the setting of the guiding frame during the construction process, a sliding installation for the guiding frame is provided.

[0032] The setting of the sliding assembly realizes the double-stage fixation of the guiding frame relative to the steel trestle in the vertical and horizontal directions through the jacking mechanism and the connecting rod. Further, the connecting rod cooperates with the reinforcing beam to fix the longitudinal beam.

[0033] The guiding component is telescopically arranged to meet the functions of expanding the guiding, retracting and storing, and then moving.

[0034] Other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the full-bay steel trestle according to one of the technical solutions of the present invention;

[0036] Figure 2 It is an exploded structural diagram of the steel trestle according to one of the technical solutions of the present invention;

[0037] Figure 3 It is a schematic structural diagram of the full-bay steel trestle according to one of the technical solutions of the present invention;

[0038] Figure 4 It is a schematic cross-sectional structural diagram of the full-bay steel trestle according to one of the technical solutions of the present invention;

[0039] Figure 5 It is a schematic structural diagram of the guiding frame according to one of the technical solutions of the present invention;

[0040] Figure 6 According to the present invention Figure 4 The enlarged structural diagram of part A.

[0041] The reference numerals are as follows: crawler crane 1; steel pipe pile 2; lower cross beam 20; Bailey beam 21; upper cross beam 22; bridge deck 23; upper longitudinal beam 3; upper abutting portion 30; first chute 31; second chute 32; lower longitudinal beam 4; lower abutting portion 40; sliding frame 5; connecting frame 50; first pulley 51; second pulley 52; jacking mechanism 53; connecting rod 6; longitudinal beam 7; strengthening beam 70; guide plate 80; guide hole 81; upper guide hole 82; lower guide hole 83; baffle 84; sliding rod 85; upper connecting plate 9; lower connecting plate 90; connecting seat 91. Detailed implementation manners

[0042] The following further elaborates on the present invention in conjunction with embodiments, so that those skilled in the art can implement it with reference to the text of the specification.

[0043] As Figures 1-3 shown, the present invention provides a full-space steel trestle for connecting various hydraulic structures in a port. For example, for a port including a breakwater, approach dike, wharf, and approach bridge for connecting the approach dike and the wharf, the steel trestle is arranged to connect the breakwater, approach dike, wharf, and approach bridge, using the steel trestle as a construction access road and platform for each hydraulic structure, changing the water construction into land construction;

[0044] The full-space steel trestle includes:

[0045] A steel pipe pile foundation, which is a group of steel pipe piles 2 composed of multiple steel pipe piles 2, with the bottom end embedded in the water bottom. Preferably, in order to increase the overall stability of the steel pipe pile group, connections are provided between adjacent steel pipe piles 2 in the transverse direction, and the connection relationship between steel pipe piles 2 in the longitudinal direction is determined according to the actual situation;

[0046] A lower cross beam 20, which is arranged at the top of the steel pipe pile foundation. Among them, the lower cross beam 20 includes multiple ones arranged at intervals along the longitudinal direction of the steel trestle. Each lower cross beam 20 is used to connect the steel pipe piles 2 in the transverse direction of the steel trestle. (Note: The extending direction of the steel trestle, that is, the passing direction, is its longitudinal direction, and the direction perpendicular to the extending direction is the transverse direction. The same applies to the subsequent descriptions of the transverse and longitudinal directions of each component)

[0047] Bailey beams 21, which include a pair arranged at both ends of the lower cross beam 20 in the transverse direction;

[0048] Upper cross beams 22, which include multiple ones arranged at intervals along the longitudinal direction of the Bailey beams 21. The multiple upper cross beams 22 are arranged at the top of a pair of relatively arranged Bailey beams 21;

[0049] A bridge deck 23, which is laid on the top of the upper cross beam 22;

[0050] Among them, a pair of upper longitudinal beams 3 are arranged at intervals along the transverse direction on the bottom surface of the upper cross beam 22, and a pair of lower longitudinal beams 4 are arranged at intervals along the transverse direction on the top surface of the lower cross beam 20. The pair of upper longitudinal beams 3 and the pair of lower longitudinal beams 4 extend synchronously along the extending direction of the steel trestle. With this technical solution, the pair of upper longitudinal beams 3 and the pair of lower longitudinal beams 4 respectively further provide the connection of the lower cross beam 20 and the upper cross beam 22 in the longitudinal direction. At the same time, the pair of upper cross beams 22 and the pair of lower longitudinal beams 4 cooperate with the setting of the guiding frame during the construction process to provide the sliding installation of the guiding frame. Specifically:

[0051] The outer sides of the upper longitudinal beam 3 and the lower longitudinal beam 4 are both recessed to form a first sliding groove 31, and the bottom side of the first sliding groove 31 is recessed to form a second sliding groove 32. Among them, the first sliding groove 31 and the second sliding groove 32 both extend along the extending direction of the steel trestle;

[0052] As Figures 4-6 shown, the guiding frame includes:

[0053] ①. A sliding component, which is slidably and fixedly connected to a pair of upper longitudinal beams 3 and a pair of lower longitudinal beams 4. The sliding component includes:

[0054] A pair of sliding frames 5, and the pair of sliding frames 5 are respectively slidably connected to the upper longitudinal beam 3 and the lower longitudinal beam 4 on the same side. Each sliding frame 5 includes a connecting frame 50, an upper sliding unit arranged at the top (inner side top) of the connecting frame 50, and a lower sliding unit arranged at the bottom (inner side) of the connecting frame 50. At least two of the lower sliding units and the upper sliding units corresponding to each connecting frame 50 are arranged at intervals along the longitudinal direction. Each upper sliding unit and each lower sliding unit include a first pulley 51 matching the corresponding first sliding groove 31 and a second pulley 52 matching the corresponding second sliding groove 32. Among them, the top side of the first sliding groove 31 of the upper longitudinal beam 3 extends away from the upper longitudinal beam 3 relative to its bottom side to form an upper abutting portion 30, and the bottom side of the first sliding groove 31 of the lower longitudinal beam 4 extends and is recessed to form a lower abutting portion 40. The lower abutting portion 40 of the lower longitudinal beam 4 is located outside the second sliding groove 32. At least two jacking mechanisms 53 are fixedly connected at intervals along the longitudinal direction below the connecting frame 50. When the jacking mechanism 53 shortens so that its bottom end disengages from the lower abutting portion 40, the second pulley 52 slides in the second sliding groove 32, and at the same time, the first pulley 51 is arranged in the first sliding groove 31 in a matching manner. When the jacking mechanism 53 extends so that its bottom end abuts on the lower abutting portion 40 of the lower longitudinal beam 4 and continues to extend to drive the connecting frame 50 to move upward until the top end of the connecting frame 50 abuts on the upper abutting portion 30 of the upper longitudinal beam 3, the primary fixation of the sliding component relative to the steel trestle is realized;

[0055] At least two connecting rods 6 are arranged at intervals along the same horizontal plane and all pass through a pair of connecting frames 50. The protruding end of each connecting rod 6 is fixed by a nut, that is, the relative distance between the pair of connecting frames 50 is limited by at least two connecting rods 6. During the sliding process, the second pulley 52 is limited to slide in the second slide groove 32. At the same time, the first pulley 51 is matched in the first slide groove 31 to avoid derailment. When fixing the guide frame, the distance between the two is further tightened to reduce the distance between the two, so as to realize the secondary fixation of the sliding assembly relative to the steel trestle.

[0056] ②, an extension assembly, which is fixedly connected to a pair of sliding assemblies, the extension assembly includes a plurality of longitudinal beams 7 arranged at intervals in the transverse direction, and a reinforcing beam 70 fixedly arranged between the plurality of longitudinal beams 7, the plurality of reinforcing beams 70 are used to connect the plurality of longitudinal beams 7, the longitudinal beams 7 are fixedly connected to the connecting rod 6, so that the extension assembly is fixedly connected to the pair of sliding assemblies, preferably, the connecting rod 6 is fixedly passed through a plurality of longitudinal beams 7 arranged at intervals, and the fixing method can be welding;

[0057] Further preferably, there are four longitudinal beams 7, which are symmetrically arranged in the transverse direction, and the reinforcing beam 70 and the connecting rod 6 are arranged at intervals in the longitudinal direction of the longitudinal beam 7, so as to improve the stability of the whole device;

[0058] ③, a guide assembly, comprising a pair of guide frames which can be slid transversely along the steel trestle and can be positioned at the front ends of the plurality of longitudinal beams 7, wherein each guide frame comprises a pair of guide plates 80 which are spaced apart from each other, and an upper guide hole 82 and a lower guide hole 83 which are coaxially arranged through the pair of guide plates 80, and the upper guide hole 82 and the lower guide hole 83 constitute a guide hole 81;

[0059] When the distance between the pair of guide frames is extended to a predetermined distance, the pair of guide holes 81 form a positioning guide for the steel pipe pile 2 to be hoisted; when the distance between the pair of guide frames is shortened to a minimum distance, the length of the guide assembly along the width direction of the steel trestle is set so that it can freely pass through the middle space of the steel trestle;

[0060] Preferably, two sliding bars 85 are arranged at intervals on each guide plate 80 along the longitudinal direction of the longitudinal beam 7, and each sliding bar 85 is connected to the longitudinal beam 7 in a transverse sliding manner. The longitudinal beam 7 is clamped between the sliding bars 85 corresponding to each guide frame, and the sliding bars 85 corresponding to a pair of guide frames are staggered along the longitudinal direction of the longitudinal beam 7, wherein, when a pair of guide frames are extended to a predetermined distance and shortened to a minimum distance driven by the sliding bars 85, the sliding bars 85 and the longitudinal beam 7 are detachably fixedly connected. Specifically, fixed screw holes are arranged on the longitudinal beam 7, and a first movable screw hole and a second movable screw hole are arranged at intervals on the sliding bar 85. When the distance between the pair of guide frames is extended to a predetermined distance, the first movable screw hole is arranged correspondingly to the corresponding fixed screw hole, and when the distance between the pair of guide frames is extended to the minimum distance, the second movable screw hole is arranged correspondingly to the corresponding fixed screw hole.

[0061] In another technical solution, the guide frame further includes:

[0062] The upper connecting plate 9 is fixedly installed at the top ends of the two middle longitudinal beams 7 and is slidably connected to the sliding rod 85 located below it;

[0063] The lower connecting plate 90 is fixedly installed at the bottom ends of the two middle longitudinal beams 7 and is slidably connected to the sliding rod 85 located above it. Specifically, the upper connecting plate 9 and the lower connecting plate 90 are arranged between a pair of middle longitudinal beams 7, and the upper connecting plate 9 and the lower connecting plate 90 are connected to the longitudinal beams 7 on their corresponding two sides through the connecting seat 91. Adopting this solution can further improve the sliding stability of the overall device.

[0064] In another technical solution, a baffle 84 is arranged between one side of a pair of guide plates 80 and the longitudinal beam 7, and a telescopic cylinder is arranged on the longitudinal beam 7 adjacent to the baffle 84. The output end of the telescopic cylinder is connected to the baffle 84 to drive the guide frame to move through the baffle 84. Adopting this solution can realize the control of the position of the guide frame through the arrangement of a pair of telescopic cylinders.

[0065] The present invention provides a construction method for a full hall steel trestle, including the following steps:

[0066] S0. Provide support from the shore to complete the construction of the starting-end steel pipe piles 2. After the construction is completed, install the lower cross beam 20, the Bailey beam 21, the upper cross beam 22, the bridge deck 23, as well as the upper longitudinal beam 3 and the lower longitudinal beam 4 correspondingly;

[0067] S1. Use the completed stage of the steel trestle as the working platform, and a crawler crane 1 is arranged on it. Among them, the front end of the working platform is slidably and fixedly connected to the guide frame through a pair of upper longitudinal beams 3 and a pair of lower longitudinal beams 4. Specifically:

[0068] Match a pair of sliding frames 5 with a corresponding pair of upper longitudinal beams 3 and a pair of lower longitudinal beams 4, and then limit the position through the connecting rod 6, so that the second pulley 52 slides in the second chute 32 correspondingly. At the same time, the first pulley 51 is correspondingly arranged in the first chute 31 to avoid derailment. At this time, the jacking mechanism 53 shortens so that its bottom end disengages from the lower abutting part 40;

[0069] S2. Move the guide frame to the predetermined position in the stage to be installed, and the sliding assembly is fixedly connected to a pair of upper longitudinal beams 3 and a pair of lower longitudinal beams 4 to position the guide frame. Specifically:

[0070] Tighten the connecting rod 6 to reduce the distance between the two connecting frames 50 until appropriate movement is achieved;

[0071] The jacking mechanism 53 extends so that its bottom end abuts against the lower abutting portion 40 of the lower longitudinal beam 4, and continues to extend to drive the connecting frame 50 to move upward until the top end of the connecting frame 50 abuts against the upper abutting portion 30 of the upper longitudinal beam 3;

[0072] Tighten the positioning connecting rod 6 further to achieve the positioning of the guiding frame;

[0073] S3. Control to expand the distance between a pair of guiding frames to a predetermined distance. At this time, a pair of guiding holes 81 form a positioning guide for the steel pipe pile 2 to be hoisted;

[0074] The crawler crane 1 hoists the steel pipe pile 2 and positions it through the guiding hole 81, and then sinks and fixes the steel pipe pile 2;

[0075] S4. Cut the steel pipe pile 2 with excessive length. After cutting, the top height of the steel pipe pile 2 is lower than the bottom height of the guiding frame;

[0076] Control to expand the distance between a pair of guiding frames to the minimum distance, so that the length of the guiding assembly in the width direction of the steel trestle is set to freely pass through the middle space of the steel trestle;

[0077] Remove the fixed connections between the sliding assembly and a pair of upper longitudinal beams 3 and a pair of lower longitudinal beams 4 to slide the guiding frame away from the steel pipe pile 2. Specifically: loosen the positioning connecting rod 6 to meet the limiting function;

[0078] The jacking mechanism 53 shortens so that its top end disengages from the upper abutting portion 30 of the upper longitudinal beam 3, and further shortens so that its bottom end disengages from the lower abutting portion 40 of the lower longitudinal beam 4;

[0079] Install the lower cross beam 20, Bailey beam 21, upper cross beam 22, bridge deck 23, upper longitudinal beam 3 and lower longitudinal beam 4 in sequence;

[0080] S5. Repeat S2 - S4 to complete the construction of the remaining stages. When performing the final finishing work, remove the guiding frame.

[0081] Although the embodiments of the present invention have been disclosed as above, it is not limited to only the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. Construction method of full-floor steel trestle, characterized in that, The full - floor steel trestle is used to connect each hydraulic structure in the port, including steel pipe pile foundations, lower cross - beams arranged at the top of the steel pipe pile foundations, Bailey beams arranged at both ends of the lower cross - beams along the transverse direction, upper cross - beams arranged longitudinally at intervals along the Bailey beams, and bridge decks laid on the top of the upper cross - beams. Among them: A pair of upper longitudinal beams are arranged at intervals along the transverse direction on the bottom surface of the upper cross - beam, and a pair of lower longitudinal beams are arranged at intervals along the transverse direction on the top surface of the lower cross - beam. The pair of upper longitudinal beams and the pair of lower longitudinal beams extend synchronously along the extension direction of the steel trestle. The construction method of the full - floor steel trestle includes the following steps: S1. Use the completed stage of the steel trestle as an operation platform, on which a crawler crane is set. Among them, the front end of the operation platform is slidably and fixedly connected with a guiding frame through a pair of upper longitudinal beams and a pair of lower longitudinal beams. The guiding frame includes: A sliding component, which is slidably and fixedly connected with a pair of upper longitudinal beams and a pair of lower longitudinal beams; An extension component, which is fixedly connected with a pair of sliding components. The extension component includes multiple longitudinal beams arranged at intervals along the transverse direction and strengthening beams fixed between the multiple longitudinal beams; A guiding component, which includes a pair of guiding frames slidably positioned at the front ends of the multiple longitudinal beams along the longitudinal direction of the steel trestle. Among them, the guiding frame has a guiding hole. When the distance between the pair of guiding frames expands to a predetermined distance, the pair of guiding holes form positioning and guiding for the steel pipe pile to be hoisted. When the distance between the pair of guiding frames shortens to the minimum distance, the length of the guiding component along the width direction of the steel trestle is set so that it can freely pass through the middle space of the steel trestle; S2. Move the guiding frame to the predetermined position in the stage to be installed. The sliding component is fixedly connected with a pair of upper longitudinal beams and a pair of lower longitudinal beams to position the guiding frame. Control to expand the distance between the pair of guiding frames to the predetermined distance. The crawler crane hoists the steel pipe pile and positions it through the guiding hole, and then sinks and fixes the steel pipe pile. S3. Cut the steel pipe pile with excessive length. Control to expand the distance between the pair of guiding frames to the minimum distance. Remove the fixed connection between the sliding component and the pair of upper longitudinal beams and the pair of lower longitudinal beams to slide the guiding frame away from the steel pipe pile. Then, install the lower cross - beam, Bailey beam, upper cross - beam, bridge deck, as well as the upper longitudinal beam and the lower longitudinal beam in sequence. S4. Repeat S2 - S3 to complete the construction of the remaining stages.

2. The construction method of the full-height steel trestle according to claim 1, characterized in that: The outer sides of the upper longitudinal beam and the lower longitudinal beam are both recessed with first chutes, and the bottom side of the first chute is recessed with second chutes; The sliding component includes: A pair of sliding frames, and the pair of sliding frames are respectively slidably connected with the upper longitudinal beam and the lower longitudinal beam on the same side. Each sliding frame includes a connecting frame, an upper sliding unit arranged at the top of the connecting frame, and a lower sliding unit arranged at the bottom of the connecting frame. At least two of the lower sliding units and the upper sliding units corresponding to each connecting frame are arranged at intervals along the longitudinal direction. Each upper sliding unit and each lower sliding unit include a first pulley matching the corresponding first chute and a second pulley matching the corresponding second chute. Among them, at least two jacking mechanisms are fixedly connected along the longitudinal direction below the connecting frame. When the jacking mechanism shortens, the second pulley slides in the second chute. When the jacking mechanism extends, its bottom end abuts against the lower longitudinal beam and drives the connecting frame to move upward until the top end of the connecting frame abuts against the upper longitudinal beam; At least two connecting rods are arranged at intervals along the same plane and both pass through a pair of connecting frames. The passing end of each connecting rod is fixed by a nut, and the longitudinal beam is fixedly connected to the connecting rod.

3. The construction method of the full-height steel trestle as claimed in claim 2, characterized in that: There are four longitudinal beams, and the reinforcing beams and connecting rods are arranged at intervals along the longitudinal direction of the longitudinal beams.

4. The construction method of the full-height steel trestle as claimed in claim 3, characterized in that: Each guide frame includes a pair of guide plates spaced apart from each other, and an upper guide hole and a lower guide hole coaxially arranged through the pair of guide plates, wherein the upper guide hole and the lower guide hole constitute a guide hole; Two sliding bars are arranged at intervals on each guide plate along the longitudinal direction of the longitudinal beam, each sliding bar is connected to the longitudinal beam in a transverse sliding manner, the longitudinal beam is clamped between the sliding bars corresponding to each guide frame, and the sliding bars corresponding to a pair of guide frames are staggered along the longitudinal direction of the longitudinal beam, wherein, when a pair of guide frames are extended to a predetermined distance and shortened to a minimum distance driven by the sliding bars, the sliding bars are detachably fixed to the longitudinal beam.

5. The construction method of the full-height steel trestle as claimed in claim 4, characterized in that: Also includes: An upper connecting plate, which is fixedly mounted on the top ends of the two longitudinal beams in the middle and is slidably connected to the sliding rods located below it; The lower connecting plate is fixedly mounted on the bottom ends of the two longitudinal beams in the middle and is slidably connected with the sliding rods located above the lower connecting plate.

6. The construction method of the full-height steel trestle as claimed in claim 4, characterized in that: A baffle is arranged between a pair of guide plates and one side opposite to the longitudinal beam, a telescopic cylinder is arranged on the longitudinal beam adjacent to the baffle, and an output end of the telescopic cylinder is connected to the baffle to drive the guide frame to move through the baffle.

7. The construction method of the full-height steel trestle as claimed in claim 3, characterized in that: The connecting rod is fixedly passed through a plurality of longitudinal beams arranged at intervals.

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