A method for installing a cantilevered bridge launching machine

Abstract

The application provides a cantilever bridge pouring bridge machine installation method, which comprises the following construction steps: removing the 0# block intermediate formwork; laying out the bridge machine track position of the 0# block box girder, installing three "L" type three-frame assembling platform supports with inclined braces at three webs of the box girder, and connecting the support top profile steels into a whole; installing the sleeper girder profile steel; installing the front support, the roller frame, and sequentially installing the main girder assembling cushion block; assembling the main girder into a whole on the ground site; sequentially installing the outer form longitudinal beam sling, the profile steel longitudinal beam, removing the 0# block bottom formwork, and installing the middle cross beam leg; installing the bottom formwork; installing the standard procedure to carry out the bearing test; lifting the longitudinal beam to position the inner formwork; and installing the safety system. The application innovates the conventional installation steps, changes the flow operation into parallel operation, and changes the independent component hoisting into modular hoisting, for example, simultaneously carrying out the modular assembly of the four sections of the main girder in the installation process of the assembling platform, so that the installation efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the field of railway and bridge construction technology, and particularly relates to a method for installing a cantilever pouring bridge building machine. BACKGROUND

[0002] With the acceleration of high-speed railway construction, cable-stayed bridges and suspension bridges are increasingly applied in crossing large rivers and the like, and the cantilever cast-in-place beam construction technology is increasingly researched. In the face of large-section, large-segment, large-weight and high-efficiency cantilever casting beam construction, the traditional hanging basket no longer meets the requirements. The emergence of the cantilever pouring bridge building machine solves the problems of great construction difficulty, high safety risk and difficult linear control.

[0003] At present, the cantilever pouring bridge building machine is still less used, and the research on the equipment is only focused on the innovation, advancement and practicality of the equipment itself, and there is little research on the installation method of the new type of equipment. As a new type of equipment, the cantilever pouring bridge building machine has large volume, large weight, many systems and complex structure, and the safety risk, quality risk and rework rate in the installation process are high. Whether the installation is safe, efficient and correct will directly affect the enterprise reputation and construction progress.

[0004] Therefore, it is necessary to provide a bridge building machine installation method with high installation efficiency, high quality and safety and stability. SUMMARY

[0005] In order to solve the problems of the prior art, in combination with the prior art and from the practical application, the present application provides a cantilever pouring bridge building machine installation method, which innovates the conventional installation steps, changes the flow operation to parallel operation, and changes the independent component hoisting to modular hoisting. For example, in the installation process of the assembly platform, the modular assembly of the four segments of the main beam is simultaneously performed, so that the installation efficiency is greatly improved.

[0006] In order to achieve the above object, the technical scheme of the present application is as follows:

[0007] A cantilever pouring bridge building machine installation method comprises the following steps:

[0008] S1, remove the middle formwork of the 0# block, and change the 0# block into a hanging basket side formwork according to the design drawing of the bridge building machine;

[0009] S2, place the 0# block box girder on the track position of the bridge building machine, install three "L" type three-frame assembly platform supports with inclined braces at three web plates of the box girder, and connect the top steel of the supports into a whole;

[0010] S3, install the sleeper beam steel, extend the running track on the ground site, hoist the beam by the crane after the extension, and place the beam on the sleeper beam;

[0011] S4, install the front support and the roller frame, and sequentially install the main beam assembly cushion block;

[0012] S5, assembling the main beam into a whole on the ground site, hoisting and positioning in sequence, and fine adjusting the position of the main beam;

[0013] S6, installing the reverse roller, the lower fixed ground beam of the rear anchor, the rear anchor cross beam, the upper fixed sky beam of the rear anchor, the steel sling, the front cross beam, the front and rear jacking support, the middle cross beam, and the walking hydraulic system in sequence;

[0014] S7, installing the outer mold longitudinal beam sling and the profile steel longitudinal beam in sequence, removing the 0# block bottom mold, and installing the middle cross beam leg;

[0015] S8, fixing the front and rear cross beams of the bottom platform, the sling and the anchor rod on the front cross beam and the 0# block bottom plate, installing the bottom platform longitudinal beam in position, and installing the bottom mold;

[0016] S9, installing the standard program to carry out the bearing test;

[0017] S10, fixing the inner mold longitudinal beam, the front and rear slings, and the anchor rod on the front cross beam and the 0# block top plate, assembling the inner mold on the ground site, lowering the inner mold longitudinal beam to install the inner mold hydraulic assembly, and lifting the longitudinal beam to position the inner mold;

[0018] S11, installing the safety system.

[0019] Further, step S2 specifically comprises:

[0020] S21, laying out the track position of the bridge builder on the 0# block box beam, and popping out the track frame with ink line;

[0021] S22, using the mortar leveling with the same label as the box beam to position the track;

[0022] S23, installing the "L" type three-piece assembly platform support with inclined braces at the three web plates of the box beam by manual cooperation with the crane, connecting the top profile steel of the support into a whole, and connecting them with high-strength bolts, and the top elevation of the profile steel is consistent with the top elevation of the mortar leveling.

[0023] Further, step S3 specifically comprises:

[0024] S31, installing the sleeper beam profile steel by manual cooperation with the tower crane, installing four sleeper beams A at the beam ends, and installing a single sleeper beam B at the middle of the beam, the position of the sleeper beam A is below the front support of the main beam, the position of the sleeper beam B is below the reverse pressure roller, the longitudinal center lines of the sleeper beam A and the sleeper beam B are coincident on the plane of the longitudinal center line of the main beam, and are parallel on the vertical plane;

[0025] S32, lengthening the walking track on the ground site by manual cooperation with the crane, the track is a total of 6, each two is a group, after lengthening, the crane hoists the beam, places it on the sleeper beam with the longitudinal center line of the sleeper beam A and the sleeper beam B as the control line, and the tail end of the track exceeds the sleeper beam B;

[0026] S33, three anchor rods are arranged in front of the rear support and the counter-pressure roller, two fine-rolled threaded anchor rods are arranged in each row, the bolts are fastened on the rail-type steel beam, the anchor rods pass through the pre-buried holes in the top plate and are fastened with bolts at the bottom of the top plate;

[0027] S34, the length of the track, the distance between the two tracks, the net distance of the three groups of tracks, and the horizontal condition are checked to determine whether the indexes meet the requirements of the next component installation.

[0028] Further, step S4 specifically includes:

[0029] S41, artificial cooperation with tower crane to install front support and roller frame, which are connected by high-strength friction bolts;

[0030] S42, install main beam assembly pads in sequence according to the spacing on the drawing.

[0031] Further, step S5 specifically includes:

[0032] S51, on the ground site, artificial cooperation with crane to assemble main beam A, main beam B, main beam C and main beam D into a whole by high-strength friction bolts, a total of 3 rows;

[0033] S52, artificial cooperation with crane to hoist and install the three rows of main beams in sequence, paying attention to control the net distance of the main beams;

[0034] S53, install temporary anchor-type steel beam at the upper middle position of main beam A, two fine-rolled threaded steels are anchored on the bolts below the reserved holes in the top plate of the beam, before fastening the rear anchor, the crane does not unhook, and the component is slightly stressed;

[0035] S54, fine-tune the position of the main beam and check the fastening degree of the bolts.

[0036] Further, step S6 specifically includes:

[0037] S61, install counter-roller;

[0038] S62, install rear anchor lower fixed ground beam on both sides of sleeper beam B, and anchor with bolts on the top plate of the beam;

[0039] S63, install rear anchor cross beam at the tail end of main beam A, vertically place double-row rear anchor upper fixed sky beam at the upper part, align with the rear anchor lower fixed ground beam, install steel sling, fasten the ground beam bolts to make the steel belt stressed, and remove the temporary anchor of the main beam;

[0040] S64, artificial cooperation with tower crane to install front cross beam and fasten with bolts on main beam C;

[0041] S65, install front and rear jacking supports;

[0042] S66, install middle cross beam;

[0043] S66, remove the installation platform and install the walking hydraulic system.

[0044] Further, step S7 specifically comprises:

[0045] S71, installing an outer mold longitudinal beam hanger at a proper position of the beam end and the 0# block end, installing a long steel longitudinal beam, and connecting the hanger, at this time, the weight of the outer mold is fixed on the concrete surface by the 0# block support, the tension screw rod and the longitudinal beam;

[0046] S72, removing the 0# block bottom mold and the outer mold tension screw rod, at this time, the weight of the outer mold is borne by the outer model steel longitudinal beam;

[0047] S73, lowering the longitudinal beam hanger by unscrewing the bolt, so that the outer mold is separated from the concrete surface, and the outer mold is moved forward on the longitudinal beam by manually using a hand-operated hoist;

[0048] S74, installing a middle beam hanger leg by manually cooperating with the tower crane, the hanger leg replaces the longitudinal beam rear hanger to bear the weight of the rear part of the longitudinal beam, and the longitudinal beam rear hanger is removed.

[0049] Further, step S8 specifically comprises:

[0050] S81, fixing the bottom platform front and rear cross beams, hangers and anchor rods on the front cross beam and the 0# block bottom plate by manually cooperating with the tower crane;

[0051] S82, installing the bottom platform longitudinal beam in place by manually cooperating with the tower crane, and fastening by screwing;

[0052] S83, installing the bottom mold.

[0053] Further, step S9 specifically comprises:

[0054] S91, fixing the inner mold longitudinal beam front and rear hangers and anchor rods on the front cross beam and the 0# block top plate by manually cooperating with the tower crane;

[0055] S92, assembling the inner mold into two side faces and one top face on the ground site, first vertically placing the two side faces on the bottom platform by using a crane, then lowering the inner mold longitudinal beam to install the inner mold hydraulic assembly, connecting the top face and the side face as support, and lifting the longitudinal beam to position the inner mold.

[0056] Further, step S11 specifically comprises:

[0057] S111, installing a climbing ladder;

[0058] S112, installing a guardrail;

[0059] S113, installing an outer suspended operation platform.

[0060] The beneficial effects of the present application are:

[0061] 1. The installation method innovates the conventional installation steps, changes from flow operation to parallel operation, and changes from independent component hoisting to modular hoisting, such as simultaneously performing modular assembly of four segments of the main beam in the installation process of the assembly platform, which greatly improves the installation efficiency.

[0062] 2. The installation method of the present application not only tracks, optimizes, perfects and summarizes from the timeline of the design of the equipment to the production and manufacturing of the components, from the component factory acceptance to the on-site installation, but also from the spatial line of the installation operation surface, the modular assembly site and the hoisting site, combined with scientific and reasonable process model test.

[0063] 3. The installation method of the present application is based on the actual engineering site, and the hoisting equipment used is also a conventional crane and tower crane, which avoids the cost increase caused by using unconventional heavy equipment for large-volume and heavy components, and at the same time, through summary and refinement, it is easy for technical personnel and installers to understand, and each key action in the installation process can be thoroughly understood. BRIEF DESCRIPTION OF DRAWINGS

[0064] ATTACHMENT Figure 1 Bridge machine structure of the present application Figure One .

[0065] ATTACHMENT Figure 2 Bridge machine structure of the present application Figure Two . DETAILED DESCRIPTION

[0066] The present application will be further described in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not to limit the scope of the present application. In addition, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or modifications to the present application, and these equivalent forms also fall within the scope defined by the present application.

[0067] The embodiment of the present application provides a cantilever pouring bridge machine installation method. In view of the problems mentioned in the background art, the applicant of the present application participates in the design of the equipment, and uses the previous construction experience to research, optimize the size, material and working principle of each component and state.

[0068] After the initial draft of the design is completed, the process model test is carried out in time, and the dynamic installation, static concrete pouring and dynamic walking are repeatedly deduced in combination with the actual situation on site, and the design drawings are repeatedly optimized until the construction requirements are met. In the actual installation, the installation theoretical method is continuously optimized and improved, and the installation task is successfully completed, and at the same time, a complete set of cantilever pouring bridge machine installation method is summarized and put forward.

[0069] Bridge machine structure Figure 1 , Figure 2As shown, the overall structure includes a main beam, a front cross beam, a middle cross beam, a rear anchor, a bottom platform, a suspension system, a walking system, a formwork system, a tension platform, a traveling tower crane (optional), a hydraulic control system, an electrical system, a safety protection system and an optional system, totaling 14 parts, the bridge builder and the formwork weight: formwork 114 t, bridge builder bar 256 t, total 370 t, the maximum pouring block length and weight: maximum segment length 8 m, beam segment weight 970 t, walking mode: hydraulic walking type.

[0070] The main steps of the bridge builder installation method of the embodiment are as follows:

[0071] (1) Removal, reservation and modification of 0# block formwork

[0072] ① Manually remove the 0# block middle 12 m formwork with the help of a crane, and the retained formwork at both ends must not be loosened;

[0073] ② Check whether the reserved holes and embedded parts meet the requirements of the bridge builder installation design drawing;

[0074] ③ Modify the removed 0# block formwork into a hanging basket side formwork according to the bridge builder design drawing.

[0075] (2) Installation platform construction

[0076] ① The 0# block box girder is 22 m long and 15.2 m wide, the bridge builder track position is set out, and the track frame is popped out with ink lines;

[0077] ② The track position is leveled with mortar with the same marking as the box girder, the mortar belt is 1.7 m wide, the center distance is 5.5 m, and the length is 22 m, and it is arranged in parallel;

[0078] ③ Manually install the "L" type three-frame assembly platform support 1 with inclined struts at the three web plates of the box girder with the help of a crane, connect the support top 15.2 m type steel 2 into a whole, and all are connected by high-strength bolts, and the top elevation of the type steel is consistent with the top elevation of the mortar leveling belt.

[0079] (3) Track installation and anchoring

[0080] ① Manually install the sleeper beam type steel with the help of a tower crane, the sleeper beam is divided into two types, 1.7 m long and 0.7 m high four-frame sleeper beam A3 is installed 16 cm away from the beam end, and 1.7 m long and 0.7 m high single-frame sleeper beam B4 is installed 12.6 cm away from the beam center, the position of the sleeper beam A3 is below the front support of the main beam, the position of the sleeper beam B4 is below the counter-pressure roller 7, the longitudinal center lines of the sleeper beam A3 and the sleeper beam B4 coincide with the longitudinal center line of the main beam on the vertical plane, and are parallel on the vertical plane;

[0081] ② With the help of a crane, the travel rail 5 is extended on the ground. There are a total of 6 rails, with two rails forming a group. After extension, each rail is 21m long. The crane lifts the upper beam, using the longitudinal centerline of the sleeper beam A3 and sleeper beam B4 as the control line. The rail is placed on the sleeper beam with a clear distance of 85cm. The end of the rail extends 55cm beyond the clear distance of sleeper beam B4.

[0082] ③ Three rows are set at the rear of the front support 6 and the front and rear of the counter-pressure roller 7, with two 32mm precision threaded anchor rods 8 in each row. The bolts on the track are fastened to the rail-pressing steel flat beam 9, and the anchor rods pass through the pre-embedded holes in the top plate of the beam and are fastened to the bottom bolts of the top plate.

[0083] ④ Check the track length, the distance between the two tracks, the net distance between the three sets of tracks, and the levelness to ensure that all indicators meet the requirements for the next step of component installation.

[0084] (4) Install the assembly platform

[0085] ① The tower crane front support 6 and roller frame 7 are all connected by high-strength friction bolts.

[0086] ② Install the main beam assembly pads 10 in sequence according to the spacing shown in the drawings;

[0087] (5) Main beam assembly

[0088] ① On the ground, with the help of a crane, the main beams A13, B12, C11, and D14 are assembled into a whole using high-strength friction bolts, in a total of 3 steps;

[0089] ② With the help of a crane, the three main beams are hoisted into place one by one, taking care to control the net distance between the main beams to 5.5m;

[0090] ③ Install a temporary anchored steel spreader beam 15 at the upper part of the middle position of the main beam A13. Two 32mm precision rolled threaded steel bars are anchored to the bolts under the reserved holes on the top plate of the beam. Before the rear anchor is tightened, the crane does not unhook and the component is slightly stressed.

[0091] ④ Fine-tune the position of the main beam and check the tightness of the bolts.

[0092] (6) Install the rear anchor and the front and middle crossbeams.

[0093] ① Install anti-roll wheel 16;

[0094] ② Install the rear anchor fixed ground beam 17 on both sides of the sleeper beam B4, and anchor it to the top plate of the beam with bolts 18;

[0095] ③ Install the rear anchor beam 15 at the tail end of the main beam A13, and place the double row of rear anchor fixed beams 19 vertically on the upper part, aligning them with the rear anchor fixed ground beams 17. Install steel slings 20, tighten the ground beam bolts 18 to make the steel slings bear the force, and remove the temporary anchors of the main beam (precision threaded anchor rods 8 and rail-type steel spreader beams 9).

[0096] (4) Artificially cooperate with tower crane to install front beam 21, and bolt it with main beam C11;

[0097] (5) Install front lifting support 22 and rear lifting support 23;

[0098] (6) Install middle beam 24 (not including hanging leg);

[0099] (7) Remove installation platform (platform support 1, support top 15.2m steel 2), and install walking hydraulic system 25.

[0100] (7) External mold bearing system installation

[0101] (1) Install external mold longitudinal beam sling 27 at 1.165m and 2.065m positions from beam end, and 5.5m position from 0# block end, install 10m long steel longitudinal beam 26 connected with sling, at this time, external mold weight is borne by 0# block support and tensioning screw and longitudinal beam fixed on concrete surface;

[0102] (2) Remove 0# block bottom mold and external mold tensioning screw, at this time, external mold weight is borne by external mold steel longitudinal beam 26;

[0103] (3) Lower longitudinal beam sling 27 by 3cm by unscrewing bolt, so that external mold 28 is separated from concrete surface, manually move external mold on longitudinal beam 26 by 4m (1# block length 4m) by using hand-operated hoist, total length of external mold is 5m, suitable for 1# block pouring;

[0104] (4) Artificially cooperate with tower crane to install middle beam hanging leg 29, hanging leg replaces longitudinal beam rear sling to bear longitudinal beam rear weight, and remove longitudinal beam rear sling 30.

[0105] (8) Bottom platform installation

[0106] (1) Artificially cooperate with tower crane to fix bottom platform front 31 and rear beam 32, sling 33 and anchor rod 34 on front beam and 0# block bottom plate;

[0107] (2) Artificially cooperate with tower crane to install bottom platform longitudinal beam 35 in place, and bolt connection and fastening;

[0108] (3) Install bottom mold 36.

[0109] (9) Bearing test

[0110] According to standard procedure, bearing test is carried out.

[0111] (10) Internal mold installation

[0112] (1) Artificially cooperate with tower crane to fix internal mold longitudinal beam 37, front sling 38, rear sling 39 and anchor rod on front beam 21 and 0# block top plate;

[0113] ②The inner mold is assembled into 2 side surfaces 40 and 1 top surface 41 on the ground site. The two side surfaces are first vertically placed on the bottom platform 36 by a crane, and then the inner mold longitudinal beam 37 is lowered to install the inner mold hydraulic assembly 42, which is connected to the side surfaces as support of the top surface, and the longitudinal beam is lifted to position the inner mold.

[0114] (11) Safety system installation

[0115] ①Install the crawling ladder;

[0116] ②Install the guardrail 44;

[0117] ③Install the outer suspended operation platform 43.

[0118] The installation method of the embodiment innovates the conventional installation steps, changes from flow operation to parallel operation, and changes from independent component hoisting to modular hoisting. The modular assembly of the four segments of the main beam is simultaneously performed during the installation process of the assembly platform, which greatly improves the installation efficiency. The installation method is not only tracked, optimized, improved and summarized from the timeline of the design of the equipment to the production and manufacturing of the components, from the factory acceptance of the components to the on-site installation, but also from the spatial line of the installation operation surface, the modular assembly site and the hoisting site. In combination with scientific and reasonable process model tests, the installation method is comprehensively tracked, optimized, improved and summarized. The installation method is based on the actual situation of the engineering site, and the hoisting equipment used is also a conventional crane and tower crane, which avoids the increase in cost caused by the use of unconventional heavy equipment for large-volume and heavy components. At the same time, through summarization and refinement, the installation method is easy for technicians and installers to understand, and each key action in the installation process can be thoroughly understood.

Claims

1. A method of installing a cantilevered bridge-launching machine, the method comprising: Comprise the following steps: S1, remove 0# block middle template, according to the bridge machine design drawing into hanging basket side template; S2, 0# block box beam lofting out bridge machine track position, install three 'L' type three frame assembly platform support with inclined brace at three web of box beam, support top profile steel is connected into a whole; S3, sleeper beam profile steel installation, ground site on extension running track, after extension, crane hoisting beam, put on sleeper beam; S4, install front support, roller frame, install main beam assembly pad in turn; S5, ground site into a whole, hoist in place in turn, fine adjust main beam position; S6, install reverse roller, rear anchor lower fixed girder, rear anchor crossbeam, rear anchor upper fixed roof beam, steel sling, front crossbeam, front and rear jacking support, middle crossbeam, running hydraulic system in turn; S7, install outer mold stringer sling, profile steel stringer in turn, remove 0# block bottom die, install middle crossbeam hanging leg; S8, the bottom platform front, rear crossbeam and sling, anchor rod is fixed on the front crossbeam and 0# block bottom plate, install bottom platform stringer in place, and install bottom die; S9, install standard procedure to carry out load test; S10, the inner mold stringer, front and rear sling, anchor rod is fixed on the front crossbeam and 0# block top plate, assemble inner mold on ground site, lower inner mold stringer to install inner mold hydraulic assembly, lift stringer to put inner mold in place; S11, install safety system.

2. The method of installing a cantilevered bridge-launching machine of claim 1, wherein, Step S2 specifically comprises: S21, 0# block box beam top, lofting out bridge machine track position, and use ink line to pop out track frame; S22, track position is found by mortar with the same number of box beam; S23, manual cooperation crane, install three 'L' type three frame assembly platform support with inclined brace at three web of box beam, support top profile steel is connected into a whole, all are high strength bolt connection, profile steel top elevation is consistent with the top elevation of mortar leveling.

3. The method of installing a cantilevered bridge-launching machine of claim 1, wherein, Step S3 specifically comprises: S31, manual cooperation tower crane to install sleeper beam profile steel, install four sleeper beam A at beam end, install single sleeper beam B at beam middle, the position of sleeper beam A is below the front support of main beam, the position of sleeper beam B is below the reverse pressure roller, the longitudinal center line of sleeper beam A and sleeper beam B is coincident with the longitudinal center line of main beam on the plane, and is parallel on the vertical plane; S32, manual cooperation crane to extend running track on ground site, the track is a total of 6, every two is a group, after extension, crane hoisting beam, put on sleeper beam, with the longitudinal center line of sleeper beam A and sleeper beam B as control line, the tail end of track exceeds sleeper beam B; S33, 3 anchor rods are arranged in front of front support and front and back of reverse pressure roller, every way has 2 precision rolled thread anchor rod, bolt is fastened on pressure rail profile steel pole beam on track, anchor rod passes through top plate embedded hole and is bolted on the bottom of top plate; S34, check track length, two track spacing, three group track net distance and horizontal condition, determine that each index meets the next component installation requirement.

4. The method of installing a cantilevered bridge-launching machine of claim 3, wherein, Step S4 specifically comprises: S41, manual cooperation tower crane to install front support and roller frame, all are high strength friction bolt connection; S42, install main beam assembly pad in turn according to drawing spacing.

5. The method of installing a cantilevered bridge-launching machine of claim 4, wherein, Step S5 specifically comprises: S51, on ground site, manual cooperation crane to assemble main beam A, main beam B, main beam C and main beam D into a whole with high strength friction bolt, a total of 3; S52, the artificial cooperation crane hoists the three main beams in turn and positions them, and attention is paid to controlling the net distance of the main beam; S53, a temporary anchoring type steel beam is installed at the upper middle position of the main beam A, two fine rolling threaded steels are anchored on the lower bolt of the reserved hole of the top plate of the beam, before the fastening of the rear anchor, the crane does not unhook, and the component is slightly stressed; S54, the position of the main beam is fine adjusted, and the fastening degree of the bolt is checked.

6. The method of installing a cantilevered bridge-launching machine of claim 5, wherein, Step S6 specifically includes: S61, install the counter roller; S62, install the rear anchor lower fixed beam on both sides of the sleeper beam B, and anchor the bolt to the beam top plate; S63, install the rear anchor cross beam at the tail end of the main beam A, vertically place the double-row rear anchor upper fixed roof beam at the upper part, align it with the rear anchor lower fixed ground beam, install the steel sling, fasten the ground beam bolt to make the steel belt stressed, and remove the main beam temporary anchor; S64, install the front cross beam with the tower crane, and fasten it with the main beam C; S65, install the front and rear jacking supports; S66, install the middle cross beam; S66, remove the installation platform, and install the walking hydraulic system.

7. The method of installing a cantilevered bridge-launching machine of claim 6, wherein, Step S7 specifically includes: S71, install the outer mold longitudinal beam sling at the appropriate position of the 0# block end from the beam end, and install the long steel longitudinal beam connected with the sling, at this time, the weight of the outer mold is borne by the 0# block support and the tensioning screw rod and the longitudinal beam fixed on the concrete surface; S72, remove the 0# block bottom mold, and the outer mold tensioning screw rod, at this time, the weight of the outer mold is borne by the outer model steel longitudinal beam; S73, the longitudinal beam sling is lowered by unscrewing the bolt, so that the outer mold is separated from the concrete surface, and the outer mold is manually moved forward on the longitudinal beam by using the hand-operated hoist; S74, install the middle cross beam leg with the tower crane, the leg replaces the longitudinal beam rear sling to bear the weight of the rear part of the longitudinal beam, and remove the longitudinal beam rear sling.

8. The method of installing a cantilevered bridge-launching machine of claim 7, wherein, Step S8 specifically includes: S81, fix the front and rear cross beams of the bottom platform, slings, and anchor rods on the front cross beam and the 0# block bottom plate with the help of the tower crane; S82, install the bottom platform longitudinal beam in place with the help of the tower crane, and fasten it with the bolt; S83, install the bottom mold.

9. The method of installing a cantilevered bridge-launching machine of claim 8, wherein, Step S9 specifically includes: S91, fix the front and rear slings and anchor rods of the inner mold longitudinal beam on the front cross beam and the 0# block top plate with the help of the tower crane; S92, assemble the inner mold into two side surfaces and one top surface on the ground site, first vertically place the two side surfaces on the bottom platform with the crane, then lower the inner mold longitudinal beam to install the inner mold hydraulic assembly, connect the top surface with the side surface as the support, and lift the longitudinal beam to position the inner mold.

10. The method of installing a cantilevered bridge-launching machine of claim 1, wherein, Step S11 specifically includes: S111, install the crawling ladder; S112, install the guardrail; S113, install the outer suspended operation platform.

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