Construction technology of tower-beam synchronous construction assembling bridge floor crane

Abstract

The application discloses a construction technology of a tower-beam synchronous construction assembling bridge deck crane, which comprises the following steps: firstly, a cable tower starts to enter a tower top closing section, at this time, tower-beam synchronous construction is carried out, and the cable tower is constructed by using a climbing form method while the construction of a composite beam on a top of a main pier is carried out; secondly, two bridge deck cranes capable of main arm amplitude variation are symmetrically installed on both sides of a bridge deck plate installed on the top of the main pier by using a floating crane and a tower crane at the main pier; thirdly, the two bridge deck cranes are used to symmetrically install composite beams of side spans and middle spans from the middle of the main pier to both sides; and fourthly, the bridge deck cranes are removed; when the installed composite beams are located on land, a land part has a complex terrain structure, in the third step, a sliding track crossing the complex terrain structure and an assembling platform located at an end of the sliding track are built, and the bridge deck crane completes hoisting of the composite beams in a support beam taking mode. The support beam taking mode is realized, and construction efficiency reduction and cost increase caused by the complex terrain structure obstruction are avoided.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology and relates to a construction process for a bridge deck crane used for simultaneous tower and beam construction and assembly. Background Technology

[0002] During bridge construction, the transport and construction of composite beams on both the water and land surfaces must be carried out simultaneously when constructing the side piers near the riverbank. However, complex terrain structures such as embankments, ditches, or river tributaries on the land along the riverbank can hinder the transport and construction of composite beams in these areas. For example, the Cao'e River embankment and its revetment structure, as well as the Huan Tang Nanhe River along the river, are located between the main and auxiliary piers involved in bridge construction, making the bridge transport conditions in this section extremely complex and difficult to guarantee construction efficiency. Our company is currently considering using fixed tracks to cross these complex terrain structures, lifting and installing composite beams based on the beams taken from the tracks. However, since the tracks can only transport assembled composite beams, ground-based lifting equipment cannot move alongside the composite beams on the complex terrain structures to participate in the lifting and installation process. Therefore, the existing bridge crane construction technology is difficult to apply, especially in overcoming the special construction requirements of the transition sections at both ends of the tracks. Summary of the Invention

[0003] The purpose of this invention is to provide a construction process for a bridge deck crane used in the synchronous construction and assembly of towers and beams, which solves the technical problem in the prior art of making it difficult to reliably lift and install composite beams while ensuring construction efficiency when there are complex terrain structures on land.

[0004] The construction process of the bridge deck crane for synchronous tower and beam construction includes the following:

[0005] 1. The tower begins to enter the top closure section. At this time, the tower and beam are constructed simultaneously. The tower is constructed using the climbing formwork method, while the composite beam on the top of the main pier is being constructed.

[0006] 2. Using floating cranes in conjunction with tower cranes at the main piers, two bridge deck cranes capable of variable booms are symmetrically installed on both sides of the bridge deck installed on the pier top.

[0007] 3. Using two bridge deck cranes, the composite beams of the side spans and the middle span are symmetrically installed from the middle of the main pier to both sides (2);

[0008] IV. Dismantle the bridge deck crane.

[0009] The installed composite beam is located on land, and the land part has a complex terrain structure. In step three, a sliding track crossing the complex terrain structure and an assembling platform at the end of the sliding track are built, the sliding track is arranged through a support structure and is collinear with the bridge, the components of the composite beam are assembled into a whole segment of the composite beam on the assembling platform, and the whole segment of the composite beam is slid to a hoisting position through the sliding track, the bridge deck crane completes the hoisting of the composite beam in a support beam taking manner, that is, the bridge deck crane takes the beam from the sliding track and then hoists and installs the corresponding composite beam.

[0010] Preferably, the complex terrain structure includes a dike and a shallow river located away from the dike on the side of the main pier, an auxiliary pier is arranged between the dike and the shallow river, and an auxiliary pier two is arranged on the side of the shallow river away from the dike; the sliding track is arranged in sections as a track first segment and a track second segment, one end of the track first segment extends to the shore of the water area where the main pier is located, the other end of the track first segment crosses the dike and is provided with an assembling platform one, and the assembling platform one is located on the side of the auxiliary pier one close to the dike; one end of the track second segment extends to the platform one, and the other end of the track second segment crosses the shallow river and is provided with an assembling platform two, and the assembling platform two is located on the side of the auxiliary pier two close to the shallow river.

[0011] Preferably, the step three includes the following steps:

[0012] Step 1, first round of hoisting of the composite beam is performed;

[0013] Step 2, hoisting of the composite beam of the whole segment standard segment is continued;

[0014] Step 3, when the installed composite beam is located on land, the corresponding composite beam is hoisted and installed by the bridge deck crane in a support beam taking manner from the sliding track.

[0015] Preferably, the step three specifically includes:

[0016] Step 3.1, site hardening, building of the sliding track and the assembling platform;

[0017] Step 3.2, after the steel beam is manufactured, in-plant pre-assembly is performed, and the whole segment is disassembled into small segments such as longitudinal beams, small longitudinal beams and three-segment transverse beams for storage;

[0018] Step 3.3, components are loaded according to the highway transportation process, and are transported to the bridge site;

[0019] Step 3.4, the crawler crane is used for assembling the composite beam on the assembling platform one;

[0020] Step 3.5, after the composite beam of the side span is hoisted to reach the water-land transition point, hoisting of the composite beam is performed at the transition part;

[0021] Step 3.6, the scattered assembly of the composite beam is carried out on the assembling platform one, the bridge deck crane takes the beam from the first section of the track to assemble the composite beam, until reaching the auxiliary pier one;

[0022] Step 3.7, the composite beam at the auxiliary pier one is hoisted;

[0023] Step 3.8, the scattered assembly of the composite beam is carried out on the assembling platform two, the bridge deck crane takes the beam from the second section of the track to assemble the composite beam, until reaching the auxiliary pier two;

[0024] Step 3.9, the composite beam is hoisted across the auxiliary pier at the auxiliary pier two.

[0025] Preferably, the step 3.5 comprises:

[0026] Step 3.5.1, the water taking of the side span composite beam is carried out: the composite beam is assembled and shipped, the steel beam is transported to the bridge site through the waterway, the transport ship is parked below the steel beam to be hoisted, the bridge deck crane hoists the steel beam, the transport ship leaves, the bridge deck crane hoists to a certain height, the amplitude is increased to make the composite beam below the design position, and finally hoisted to the design position, the code board or matching parts are installed, and the installation of the composite beam is completed;

[0027] Step 3.5.2, the support taking of the side span composite beam is carried out: the composite beam is manufactured in the factory, the scattered parts are transported to the bridge site by car, the 1+1 scattered assembly is carried out on the assembling platform one by using the crawler crane, the scattered assembly is disassembled and slid along the track to the corresponding hoisting position on the first section of the track, the composite beam is hoisted by the bridge deck crane, the amplitude is adjusted to the design position below after hoisting to a certain height, and finally hoisted to the design position, the installation of the composite beam is completed.

[0028] Preferably, the step 3.7 comprises:

[0029] Step 3.7.1, the 1+1 scattered assembly of the composite beam in front of the auxiliary pier one and the composite beam at the auxiliary pier one is completed;

[0030] Step 3.7.2, the composite beam at the auxiliary pier one is disassembled into scattered parts, and the disassembled scattered parts are transported to the assembling platform two;

[0031] Step 3.7.3, the composite beam at the auxiliary pier one is reassembled on the assembling platform two, and the 1+1 scattered assembly is carried out; thereafter, the scattered assembly process of the composite beam is transferred to the assembling platform two, and the support taking process is transferred to the second section of the track;

[0032] Step 3.7.4, the assembled composite beam is slid to the corresponding second section of the track, hoisted by the support taking, and the remaining composite beam on the platform is moved as the parent beam for the next round of 1+1 scattered assembly.

[0033] Preferably, the step 3.9 comprises:

[0034] Step 3.9.1, 1+1 scattered splicing is performed on the combination beam before the auxiliary pier two and the combination beam at the auxiliary pier two;

[0035] Step 3.9.2, the combination beam before the auxiliary pier two is placed on the side of the main pier in the position of the second combination beam of the auxiliary pier two occupied by the side-span erecting beam crane;

[0036] Step 3.9.3, the side-span erecting beam crane retreats by one combination beam segment, and the combination beam before the auxiliary pier two is hoisted and installed;

[0037] Step 3.9.4, the side-span erecting beam crane advances to the position in step 3.9.2, and the combination beam at the auxiliary pier two is hoisted and installed.

[0038] Preferably, the step one starts from the previous segment of the tower top closure segment, after the reinforcement binding of the corresponding segment is completed, at least one side of the inner climbing frame is removed, and then before the next segment of the cable tower is constructed, the inner climbing form is removed, the tower top closure segment support is installed, the steel anchor beam is installed, the reinforcement of the next segment is bound, the inner climbing system is removed, and after the outer climbing form is climbed in place, the inner form is installed, and the concrete is poured; after that, each segment of the cable tower is constructed by the climbing form method through the outer climbing form until the construction of the cable tower is completed.

[0039] The synchronous construction process of the combination beam on the top of the main pier comprises the following steps: a support beside the main pier is built, the combination beam of three segments on the top of the main pier is scattered and spliced from the middle to both sides after the concrete of the upper beam of the cable tower is poured, and the bridge deck is installed; the combination beam of the next segment is continuously scattered and spliced from the three segments of the combination beam which have been spliced and installed to both sides, the cable is hung, the initial tensioning is performed, then the bridge deck is installed, the secondary tensioning is performed, and when the construction is completed, the pouring of the first segment of the tower top closure segment is completed, and the cable tower enters the closing state.

[0040] The application has the following advantages: the scheme overcomes the obstruction caused by the complex terrain structure by setting the sliding track to convey the combination beam scattered and spliced on the assembly platform. The scheme also improves the hoisting process of the combination beam in combination with the assembly and conveying process of the combination beam on the corresponding sliding track, realizes the support beam taking mode, effectively realizes the hoisting and installation of the combination beam on the land side span, and avoids the reduction of construction efficiency and the increase of cost caused by the obstruction of the complex terrain structure.

[0041] And the two end transition part produced by the sliding track and the corresponding assembling platform structure is implemented by the combined beam hoisting, without changing and increasing the bridge deck hoisting equipment, the scheme overcomes the difficulty of hoisting the combined beam of the transition part through the improvement of the construction method, and avoids the increase of the related construction equipment and construction time. And in step one, the method effectively saves the construction period and shortens the construction time through the tower beam synchronous construction. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 And Figure 2 It is a schematic diagram of step two in the construction process of the tower beam synchronous construction assembling bridge deck crane in the application.

[0043] Figure 3 It is a schematic diagram of step 3.5.1 in step three of the application.

[0044] Figure 4 It is a schematic diagram of step 3.5.2 in step three of the application.

[0045] Figure 5 And Figure 6 It is a schematic diagram of step two in step three of the application.

[0046] Figure 7 It is a schematic diagram of step 3.7 in step three of the application.

[0047] Figure 8 It is a schematic diagram of step 3.9 in step three of the application.

[0048] Figure 9 It is a flowchart of step one of the application.

[0049] The marks in the drawings are: 1, bridge deck crane, 2, combined beam, 3, transport ship, 4, dike, 5, shallow river, 6, auxiliary pier one, 7, auxiliary pier two, 8, track first section, 9, track second section, 10, crawler crane, 11, assembling platform one, 12 assembling platform two. DETAILED DESCRIPTION

[0050] The application will be further described in detail by comparing the drawings and the embodiments, to help the skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the application.

[0051] As Figures 1-9 shown, the application discloses a construction process of a tower beam synchronous construction assembling bridge deck crane, which comprises:

[0052] I. The cable tower begins to enter the tower top closure section, at this time the tower beam is constructed synchronously, the cable tower is constructed by the climbing form method at the same time as the construction of the composite beam at the top of the main pier.

[0053] When the method is implemented, the cable tower at the main pier (i.e. the main bridge 16# pier) has been constructed to the 23rd segment, and there are 4 remaining segments, according to the construction plan, the cable tower will be capped. The main bridge cable tower is planned to be divided into 27 segments in total, wherein the 18th segment of the cable tower corresponds to the position of the upper cross beam of the cable tower, and is constructed asynchronously. The tower top closure section corresponds to the 25th, 26th and 27th segments of the main tower.

[0054] The method adopts tower beam synchronous construction, when the composite beam begins to be installed, the cable tower has been constructed to the 24th segment of the cable tower (i.e. the segment before the tower top closure section), at this time the lower cross beam of the cable tower has been poured, therefore this step mainly involves the construction technology of the 24th segment and above of the cable tower, and the main construction contents are climbing form climbing, steel bar binding, prestress construction, steel anchor beam installation, concrete pouring, etc.

[0055] In this step, the cable tower is constructed by the climbing form method, according to the cable tower structure and the division of the cable tower segments, the cable tower enters the tower top closure section from the 25th segment (i.e. the first segment of the tower top closure section), when the cable tower is constructed to the 24th segment, after the steel bar binding is completed, at least one side of the inner climbing form is removed, to facilitate the climbing form to be in place.

[0056] Before the cable tower is constructed to the 25th segment, the inner climbing form is removed, the tower top closure section support is installed, the steel anchor beam is installed, the steel bar of the 25th segment is bound, the inner climbing system is removed, the climbing form is in place, the inner form is installed, and the concrete is poured. The 26th segment and the 27th segment are both completed by the climbing form method through the outer climbing form to pour the concrete to cap.

[0057] In this step, the tower beam is constructed synchronously, the composite beam construction is mainly the composite beam of the 5 segments at the top of the pier and the installation of the bridge deck, and the main construction contents are the composite beam scattered splicing, the installation of the bridge deck, the installation of the stay cable, and the assembly of the bridge deck crane.

[0058] The composite beam of the 5 segments at the top of the pier adopts the floating crane + 0# block support + stay cable scattered splicing technology, the 0# block support is the side support of the main pier, and the construction process is as shown in Figure 9 , which includes: 0# block support erection, TB0 segment (segment in the middle of the top of the main pier) composite beam scattered splicing and installation of the bridge deck, SB0 segment (segment on one side of the side span of the top of the main pier) composite beam scattered splicing and installation of the bridge deck (after scattered splicing, temporary anchoring and installation of permanent supports are performed), MB0 segment (segment on one side of the middle span of the top of the main pier) composite beam scattered splicing and installation of the bridge deck, MB1 segment (next segment on one side of the middle span) composite beam scattered splicing, SB1 segment (next segment on one side of the side span) composite beam scattered splicing (after scattered splicing, the first pair of stay cables are hung and the first time tensioning is performed, and then the bridge deck is installed), and after completion, the bridge deck crane is prepared for assembly in the next step.

[0059] After the completion of the erection of the 0# block support and the concrete pouring of the upper cross beam, the combined beam of the 3 segments of the scattered and assembled pier top is assembled and the corresponding bridge deck is installed.

[0060] When the combined beam of the scattered and assembled SB1 and MB1 segments is assembled, the stay cables are simultaneously hung and the initial tensioning is performed, and then the bridge deck is installed and the secondary tensioning is performed; when the combined beam of the SB1 and MB1 segments is installed, the 25th segment of the cable tower has been poured and the cable tower has been capped.

[0061] II. Two bridge deck cranes 1 capable of main arm luffing are symmetrically installed on both sides of the bridge deck installed on the pier top by using the floating crane in cooperation with the tower crane at the main pier.

[0062] After the combined beam of the 5 segments of the pier top is installed, the bridge deck crane is installed, and then the remaining segment combined beam is sequentially erected by using the bridge deck crane. Step two further comprises the following steps.

[0063] Step 1, arranging the bridge deck crane 1.

[0064] After two bridge deck cranes 1 are installed by using the floating crane, plus the lifting equipment arranged on the bridge, there are two bridge deck cranes 1, an 80t truck crane and a flat car on each pier top. The longitudinal bridge deck is 49.2m long, the bridge deck crane 1 occupies 2*20.7m, the middle empty space is 7.8m long and 2.8m wide, and the crane is transversely placed in the middle empty space. The transverse bridge deck is 29.1m wide, the bridge deck crane 1 occupies 22.4m, the two side empty spaces are each 3.5m and 2.8m wide, and the flat car is longitudinally placed in one side empty space.

[0065] The bridge deck crane 1 is provided with a walking track, the bottom of the track is provided with a cushion beam, the cushion beam is located on the cross beam and has a height greater than the height of the bridge deck, and walking is realized through the jacking cylinder.

[0066] Step 2, the bridge deck crane 1 in the experimental area is prepared, inspected and debugged before use.

[0067] Preparation and inspection of the bridge deck crane 1 before use: the main power supply should be turned off before use, the safety of the crane is checked, and all parts should be complete and undamaged.

[0068] Debugging of the bridge deck crane 1 before use: including no-load trial operation, debugging of the brake, debugging of the electrical system, debugging of the limiting device and whole vehicle walking.

[0069] The purpose of the no-load test is to check the quality defects existing in the manufacture and installation. First, the individual operation of each mechanism is carried out, at this time, the voltage, current, power, starting current, steering, and rotating speed should be observed to be normal. Then, the combined operation including forward and reverse rotation and fast and slow speed is carried out. It is checked whether each moving part is loose, there should be no more than the specified deflection and vibration, the transmission gear should not have abnormal sound, the working temperature should not exceed the specified range, and the brake should be flexible and reliable in action.

[0070] Step 3, the bridge crane 1 fulcrum reinforcement is carried out.

[0071] Front fulcrum reinforcement: the most unfavorable hoisting condition of the bridge crane 1 is that the front lower fulcrum counterforce is 506 t. In order to control the line type of the heavy cross beam during the construction process and reduce the deformation of the cross beam, local stiffening is arranged at the front fulcrum to reduce the local stress.

[0072] Rear anchor point reinforcement: the most unfavorable hoisting condition of the bridge crane 1 is that the rear fulcrum counterforce is -140.2 t. In order to control the line type of the heavy cross beam during the construction process and reduce the deformation of the cross beam, local stiffening is arranged at the rear anchor point to reduce the local stress.

[0073] According to the process, the corresponding positions of the partial cross beams of the composite beam 2 need to be provided with stiffening reinforcement, 16 stiffening plates are needed for a single cross beam, and a total of 63 cross beams of the whole bridge need to be reinforced, and the thickness of the local stiffening is not less than 14 mm.

[0074] The shear studs within the range of ±2.5 m of the front fulcrum and the rear anchor point of the bridge crane 1 are welded on site. When the bridge crane 1 moves forward and the rear space is empty, it can be carried out. The shear studs at the remaining positions are welded on the surface of the composite beam in advance in the factory.

[0075] Three, two bridge cranes 1 are used to symmetrically install the composite beams 2 of the side span and the middle span from the middle of the main pier to the two sides.

[0076] The composite beam 2 of the present scheme is provided with matching parts, the matching parts are welded at the specified positions of the beam segments during the factory trial assembly, the steel main beam is preliminarily adjusted to the design angle during the on-site installation, is lifted to the design position, is positioned through the guide device, is accurately measured, is rechecked, and is not wrong, then the matching part bolt is screwed, after the screwing is completed, the hook is released after the inspection is qualified, the next section hoisting and the girth weld welding of the section are entered. The installation process includes the following steps.

[0077] Step 1, the first round hoisting of the composite beam 2 is carried out.

[0078] The erection of the composite beam 2 is carried out by the bridge crane 1 in the present scheme, and the specific steps of the first round hoisting are as follows.

[0079] Step 1.1, two bridge cranes 1 initial installation position, the first round of lifting, one side crane retreat a beam position, longitudinal bridge to the deck length 49.2m, bridge crane 1 occupies 24.6+20.7=45.3m, vacancy length 3.9m, width 2.8m; crane transverse stand in the middle of the gap. Cross bridge deck plate width 29.1m, bridge crane 1 occupies 22.4m, both sides of the gap is 3.5m, 2.8m wide, flat car longitudinal stand in one side gap.

[0080] Step 1.2, when the bridge crane 1 hoists MB2-1, the hoisting amplitude is 9.7m, and the bridge crane 1 in the side span maintains the position on the right side of SB1-1.

[0081] Step 1.3, the bridge crane 1 in the middle span walks to the left side of MB1-1 (in this embodiment, the main pier is located on the right side of the water area, the center of the water area is located on the left side of the main pier, and the middle span is located on the left side of the side span), the bridge crane 1 in the side span retreats to the erection position to erect SB2-1 and SB2-2, and the hoisting amplitude is 9.7m-17.6m.

[0082] Step 1.4, the bridge crane 1 in the side span walks forward to the SB3-1 erection position, the bridge crane 1 in the middle span retreats to the erection position to erect MB2-2, and the hoisting amplitude is 17.6m.

[0083] Step 1.5, the bridge crane 1 in the middle span walks to the MB3-1 erection position, and the next round of installation is performed.

[0084] Step 2, continue to hoist the composite beam 2 of the whole segment standard segment.

[0085] The standard segment hoisting refers to the case that three segment steel beams are arranged between adjacent two stay cables in the construction process, that is, the two-cable three-segment working condition, and the specific steps are as follows.

[0086] Step 2.1, the bridge crane 1 hoists the first two segments with the same occupation, and the hoisting amplitude is 9.8-17.6m.

[0087] Step 2.2, install the first pair of stay cables and tension.

[0088] Step 2.3, the bridge crane 1 moves forward by one segment distance, hoists the third segment, and the hoisting amplitude is 13.7m.

[0089] Step 2.4, install the second pair of stay cables and tension.

[0090] When the to-be-installed composite beam 2 is on the water, the beam is taken from the water, the assembled composite beam 2 is transported to the hoisting position of the side span and the middle span by the transport ship 3, and the corresponding composite beam 2 is hoisted and installed by the bridge crane 1.

[0091] When the installed composite beam 2 is on land, the beam is taken from the support, and the corresponding composite beam 2 is hoisted and installed by the bridge crane 1.

[0092] According to the range of the masonry edge line of the construction site shore, the range of the beam segment of the support beam installation is divided, specifically, 17 segments from SB7-1 segment to SB18-1 segment. This batch of composite beams 2 need to be assembled into complete segments on the above assembling platform, and then the complete segment composite beams 2 are slid to the hoisting position through the sliding track and then installed. The land part has a complex terrain structure which hinders the transportation and collision of the composite beams 2.

[0093] The complex terrain structure includes a dike 4 and a shallow river 5 located away from the main pier on one side of the dike 4, an auxiliary pier one 6 is arranged between the dike 4 and the shallow river 5, and an auxiliary pier two 7 is arranged on the side of the shallow river 5 away from the dike 4. The sliding track is arranged through a support structure and is collinear with the bridge, and is arranged in segments as a first track segment 8 and a second track segment 9. The first track segment 8 extends to the shore of the water area where the main pier is located at one end, and extends across the dike 4 and is provided with an assembling platform one 11 at the other end, and the assembling platform one 11 is located on the side of the auxiliary pier one 6 close to the dike 4. The second track segment 9 extends to the platform one at one end, and extends across the shallow river 5 and is provided with an assembling platform two 12 at the other end, and the assembling platform two 12 is located on the side of the auxiliary pier two 7 close to the shallow river 5.

[0094] This step specifically includes.

[0095] Step 3.1, site hardening, building sliding track and assembling platform.

[0096] Step 3.2, after the steel beam manufacturing is completed, the pre-assembly in the factory is carried out, and the disintegration into small segments such as longitudinal beams, small longitudinal beams and three-section transverse beams is stored.

[0097] Step 3.3, according to the highway transportation process, the scattered parts are loaded and transported to the bridge site.

[0098] Step 3.4, using a 200T crawler crane 10 to carry out 1+1 scattered assembly on the assembling platform one 11, and the beam segment interval of the composite beam 2 assembled on the assembling platform is SB7-1 to SB12-1 segment.

[0099] The scattered assembly is to assemble the scattered parts into a composite beam 2, and the 1+1 scattered assembly is to assemble the first land part of the composite beam 2, and then assemble the next composite beam 2 with the mother beam, so as to ensure that the two composite beams 2 can be accurately matched and installed. The subsequent scattered assembly process of the composite beam 2 is also carried out with the next segment composite beam 2 obtained by the previous 1+1 scattered assembly as the mother beam for the scattered assembly of the next segment composite beam 2.

[0100] The assembled composite beam 2 is slid onto the corresponding track first segment 8 and hoisted by the beam support; the remaining composite beam 2 on the platform is moved as a mother beam, and the next round of 1+1 scattered assembly is performed. One round is the process of 1+1 scattered assembly of the previous segment composite beam 2 on the assembly platform to the next round of 1+1 scattered assembly of the remaining composite beam 2 on the platform as a mother beam.

[0101] Step 3.5, after the composite beam 2 of the side span is hoisted to the water-land transition point, the composite beam 2 is hoisted at the transition part.

[0102] The rock edge line at the dam toe is the water-land transition point, and the corresponding segments have side spans SB6-2 (water beam) and SB7-1 (support beam) at the transition part. The composite beam 2 to be installed is on land, and due to the complex terrain structure of the installation position, a sliding track is previously built on land, which spans the complex terrain structure. Then the beam is taken from the sliding track by the support beam, and the corresponding composite beam 2 is hoisted and installed by the bridge crane 1.

[0103] The beam taking positions and construction methods of the above two segments are as follows.

[0104] Step 3.5.1, water beam installation of side span SB6-2: after the composite beam 2 is assembled, it is prepared for loading on the ship, the steel beam is transported to the bridge site by water, and the transport ship 3 is parked below the steel beam to be hoisted. The parking position of the transport ship 3 is at least 5.5 m away from the rock edge line on the shore, at which time the lifting arm distance of the bridge crane 1 is 1.5 m away from the installed segment, and the hoist amplitude is 13.2 m. After the bridge crane 1 hoists the steel beam, the transport ship 3 leaves. The load draft of the transport ship 3 is 0.874 m. The bridge crane 1 hoists the composite beam 2 of the side span SB6-2, hoists to a certain height, increases the amplitude by changing the amplitude to make the composite beam 2 located directly below the design position, the amplitude range is 13.2 m-17.6 m, finally hoists to the design position, installs the code plate or matching parts, and completes the installation of the composite beam 2.

[0105] Step 3.5.2, support beam installation of side span SB7-2: after the composite beam 2 is manufactured in the factory, the scattered parts are transported to the bridge site by car, and 1+1 scattered assembly is performed on the assembly platform one 11 using a 200t crawler crane 10. After scattered assembly, the composite beam 2 is slid along the track to the corresponding hoisting position (close to the rock edge line at the dam toe) on the track first segment 8, and the composite beam 2 is hoisted by the bridge crane 1. After hoisting to a certain height, the amplitude is adjusted to make the composite beam 2 located directly below the design position, the amplitude range is 13.7-23 m, finally hoists to the design position, and completes the installation of the composite beam 2.

[0106] Step 3.6, scattered assembly of the composite beam 2 is performed on the assembly platform one 11, the beam is taken from the track first segment 8 by the bridge crane 1 to hoist the composite beam 2, until it reaches the auxiliary pier one 6.

[0107] The assembling process of the land part of the composite beam 2 is as step 3.4, the way of taking the beam for hoisting is the same as that in step 3.5.2; the hoisting process of the standard segment after taking the beam is the same as that in step 2. The hoisting and installation are repeated according to the above steps until the auxiliary pier one 6 is reached.

[0108] Step 3.7, hoist the composite beam 2 at the auxiliary pier one 6. It includes the following steps.

[0109] Step 3.7.1, complete the separate assembling of the composite beam 2 SB11-1 and SB12-1 segments. The separate assembling is the same as the above-mentioned 1+1 separate assembling.

[0110] Step 3.7.2, separate the SB12-1 into separate parts, and transport the separate parts of the SB12-1 segment to the assembling platform two 12 by using the flat car.

[0111] Step 3.7.3, reassemble the SB12-1 segment at the assembling platform two 12, and use the 200T crawler crane 10 to perform 1+1 separate assembling of the SB12-1 segment and the SB12-2 segment. In the subsequent installation process of the composite beam 2, the separate assembling process of the composite beam 2 is transferred to the assembling platform two 12, and the process of taking the beam by the support is transferred to the track second segment 9.

[0112] Step 3.7.4, slide the assembled composite beam 2 to the corresponding track second segment 9 in the segment, hoist by the support taking the beam, and move the remaining composite beam 2 on the platform as the parent beam to the next round of 1+1 separate assembling.

[0113] Step 3.8, perform the separate assembling of the composite beam 2 at the assembling platform two 12, and take the beam from the track second segment 9 by the bridge crane 1 to hoist the composite beam 2 until the auxiliary pier two 7 is reached. The specific hoisting process of this step is the same as that in step 3.6.

[0114] Step 3.9, hoist the composite beam 2 across the auxiliary pier at the auxiliary pier two 7.

[0115] Similar to the auxiliary pier one 6, this place also cannot use the previous sliding track and assembling platform as the hoisting position, and since there is no sliding track and assembling platform on the other side of the auxiliary pier two 7 (setting the sliding track and assembling platform will increase unnecessary cost), a different way from that at the auxiliary pier one 6 is needed to complete the hoisting of the composite beam 2, which includes the following steps.

[0116] Step 3.9.1, perform 1+1 separate assembling of the side span SB17-1 segment and the side span SB18-1 segment.

[0117] Step 3.9.2, the SB16-1 left side position is occupied by the side span girder erection crane, and the SB18-1 segment is placed in advance on the side span long distance side, and the hoisting amplitude is 11.4-21.5m.

[0118] Step 3.9.3, the side span girder erection crane retreats a segment distance, hoists and installs the side span SB17-1 segment, and the hoisting amplitude is 14.9m.

[0119] Step 3.9.4, the side span girder erection crane advances to the position in step 3.9.2, hoists and installs the SB18-1 segment, and the hoisting amplitude is 15.4-21.5m.

[0120] Four, the bridge deck crane 1 is removed.

[0121] In the process of hoisting the side span composite beam 2 by the side span bridge deck crane 1, the middle span bridge deck crane 1 also synchronously hoists the middle span composite beam 2 in a relative symmetry. When the side span composite beam 2 is completely installed, all the middle span composite beams 2 except the middle span closure segment are also installed. After all the steel beams except the middle span closure segment are installed, the two bridge deck cranes 1 move to the main pier, and then move to the 18# pier deck (i.e. the middle point deck of the long distance) after the main bridge closure segment is installed, and are removed by the 200T crawler crane 10.

[0122] The above describes the present application in combination with the drawings, and it is obvious that the specific implementation of the present application is not limited by the above method, and various non-essential improvements or direct application of the inventive concept and technical solution of the present application to other occasions without improvement are within the protection scope of the present application.

Claims

1. A construction process of a tower-beam synchronous construction assembling bridge deck crane, characterized in that: The method comprises the following steps: I. The cable-stayed tower starts to enter the tower top closure section, at this time, the tower beam synchronous construction is carried out, the cable-stayed tower is constructed by using the climbing formwork method, and the combined beam at the top of the main pier is constructed at the same time; II. Two bridge deck cranes (1) capable of main arm amplitude variation are symmetrically installed on both sides of the bridge deck plate installed at the top of the main pier by using the floating crane and the tower crane at the main pier; III. The combined beams (2) of the side span and the middle span are symmetrically installed from the middle of the main pier to both sides by using the two bridge deck cranes (1); IV. The bridge deck cranes (1) are removed; When the installed combined beams (2) are located on land, the land part has a complex terrain structure, in step III, a sliding track crossing the complex terrain structure and an assembling platform located at the end of the sliding track are built, the sliding track is arranged through a support structure and is collinear with the bridge, the components of the combined beams (2) are assembled into the integral segment combined beams (2) on the assembling platform, and the combined beams (2) are slid to the hoisting position through the sliding track, the bridge deck crane (1) completes the hoisting of the combined beams (2) in the support beam taking manner, that is, the bridge deck crane (1) takes the beams from the sliding track and then hoists and installs the corresponding combined beams (2).

2. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 1, characterized in that: The complex terrain structure comprises a dike (4) and a shallow river (5) located away from the main pier on the side of the dike (4), an auxiliary pier one (6) is arranged between the dike (4) and the shallow river (5), and an auxiliary pier two (7) is arranged on the side of the shallow river (5) away from the dike (4); the sliding track is arranged in sections as a track first section (8) and a track second section (9), one end of the track first section (8) extends to the water area bank where the main pier is located, the other end of the track first section (8) crosses the dike (4) and is provided with an assembling platform one (11), and the assembling platform one (11) is located on the side of the auxiliary pier one (6) close to the dike (4); one end of the track second section (9) extends to the platform one, and the other end of the track second section (9) crosses the shallow river (5) and is provided with an assembling platform two (12), and the assembling platform two (12) is located on the side of the auxiliary pier two (7) close to the shallow river (5).

3. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 2, characterized in that: The step III comprises the following steps: Step 1, the first round hoisting of the combined beams (2) is carried out; Step 2, the hoisting of the combined beams (2) of the integral segment standard section is continued; Step 3, when the installed combined beams (2) are located on land, the support beam taking manner is adopted to take the beams from the sliding track, and the corresponding combined beams (2) are hoisted and installed by the bridge deck crane (1).

4. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 3, characterized in that: The step 3 specifically comprises the following steps: Step 3.1, site hardening, building of the sliding track and the assembling platform; Step 3.2, after the steel beam manufacturing is completed, in-plant pre-assembly is carried out, and the components are disassembled into small sections such as longitudinal beams, small longitudinal beams and three-section transverse beams and are stored; Step 3.3, the components are loaded according to the highway transportation process, and are transported to the bridge site; Step 3.4, the crawler crane (10) is used to carry out the combined beam (2) assembly on the assembling platform one (11); Step 3.5, after the combined beams (2) of the side span are hoisted to reach the water-land transition point, the combined beams (2) are hoisted at the transition part; Step 3.6, the combined beams (2) are assembled on the assembling platform one (11), the bridge deck crane (1) takes the beams from the track first section (8) to hoist the combined beams (2), and the hoisting is continued until the auxiliary pier one (6) is reached. Step 3.7, hoisting the composite beam (2) at the auxiliary pier one (6); Step 3.8, carrying out the scattered assembly of the composite beam (2) on the assembly platform two (12), and the bridge girder crane (1) takes the beam from the track second section (9) to hoist the composite beam (2) until reaching the auxiliary pier two (7); Step 3.9, hoisting the composite beam (2) across the auxiliary pier at the auxiliary pier two (7).

5. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 4, characterized in that: The step 3.5 comprises: Step 3.5.1, carrying out the waterway beam taking installation of the side span composite beam (2): after the assembly of the composite beam (2), the steel beam is transported to the bridge site through the waterway, the transport ship (3) is parked below the steel beam to be hoisted, the bridge girder crane (1) hoists the steel beam, the transport ship (3) leaves, the bridge girder crane (1) is hoisted to a certain height, the amplitude is increased to make the composite beam (2) located directly below the design position, and finally hoisted to the design position, the code board or matching parts are installed, and the installation of the composite beam (2) is completed; Step 3.5.2, carrying out the support beam taking installation of the side span composite beam (2): after the completion of the composite beam (2) in the factory, the scattered parts are transported to the bridge site by automobile, the crawler crane (10) is used to carry out 1+1 scattered assembly on the assembly platform one (11), the scattered assembly is taken off and slid along the track to the corresponding hoisting position on the track first section (8), the composite beam (2) is hoisted by the bridge girder crane (1), the amplitude is adjusted to the design position directly below after hoisted to a certain height, and finally hoisted to the design position, completing the installation of the composite beam (2).

6. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 4, characterized in that: The step 3.7 comprises: Step 3.7.1, carrying out 1+1 scattered assembly of the composite beam (2) before the auxiliary pier one (6) and the composite beam (2) at the auxiliary pier one (6); Step 3.7.2, disassembling the composite beam (2) at the auxiliary pier one (6) into scattered parts, and transporting the disassembled scattered parts to the assembly platform two (12); Step 3.7.3, reassembling the composite beam (2) at the auxiliary pier one (6) on the assembly platform two (12) for 1+1 scattered assembly; thereafter, the scattered assembly process of the composite beam (2) is transferred to the assembly platform two (12), and the support beam taking process is transferred to the track second section (9); Step 3.7.4, sliding the assembled composite beam (2) to the corresponding track second section (9) by an integral section, hoisting by the support beam taking, moving the remaining composite beam (2) on the platform as the parent beam, and carrying out the next round of 1+1 scattered assembly.

7. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 4, characterized in that: The step 3.9 comprises: Step 3.9.1, carrying out 1+1 scattered assembly of the composite beam (2) before the auxiliary pier two (7) and the composite beam (2) at the auxiliary pier two (7); Step 3.9.2, the side span beam erecting crane occupies the position of the second section composite beam (2) near the main pier one side of the auxiliary pier two (7), and the composite beam (2) at the auxiliary pier two (7) is placed on the side span long distance side first; Step 3.9.3, the side span beam erecting crane retreats by a distance of one composite beam (2) section, and hoists and installs the composite beam (2) before the auxiliary pier two (7); Step 3.9.4: The step 3.9.2 is advanced to the position of the auxiliary pier two (7) combined beam (2) hoisting installation.

8. The construction process of the tower-beam synchronous construction assembling bridge floor crane according to claim 1, characterized in that: The step one starts from the previous segment of the tower top closure segment, after the corresponding segment of the reinforcement is bound, at least one side of the inner side climbing frame is removed, then the inner side climbing form is removed before the next segment of the tower is constructed, the tower top closure segment support is installed, the steel anchor beam is installed, the reinforcement of the next segment is bound, the inner side climbing system is removed, the inner form is installed after the outer side climbing form is climbed in place, and the concrete is poured; then each segment of the tower is constructed by the outer side climbing form, until the tower is completed. The synchronous construction process of the combined beam on the top of the main pier includes: building a support beside the main pier, splicing the combined beam of the three segments from the middle to both sides of the top of the main pier after the concrete of the upper beam of the tower is poured, and installing the bridge deck; continue to splice the combined beam of the next segment from the three segments of the combined beam that have been spliced to both sides symmetrically, synchronously hang the stay cable, carry out the initial tensioning, then install the bridge deck, carry out the secondary tensioning, complete the first segment pouring of the tower top closure segment, and enter the capping state of the tower.

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