CN115305826A - Rapid pre-assembly method for large-span high-precision flange connection bridge - Google Patents
Rapid pre-assembly method for large-span high-precision flange connection bridge Download PDFInfo
- Publication number
- CN115305826A CN115305826A CN202211063402.7A CN202211063402A CN115305826A CN 115305826 A CN115305826 A CN 115305826A CN 202211063402 A CN202211063402 A CN 202211063402A CN 115305826 A CN115305826 A CN 115305826A
- Authority
- CN
- China
- Prior art keywords
- bridge
- section
- flange
- jig frame
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000003466 welding Methods 0.000 claims abstract description 33
- 238000005192 partition Methods 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000007689 inspection Methods 0.000 claims description 13
- 238000012937 correction Methods 0.000 claims description 12
- 238000005259 measurement Methods 0.000 claims description 11
- 230000008602 contraction Effects 0.000 claims description 9
- 238000009659 non-destructive testing Methods 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000011150 reinforced concrete Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000013100 final test Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000008520 organization Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of assembly of steel structure bridges, in particular to a quick pre-assembly method of a large-span high-precision flange connection bridge; the method comprises the following steps of 1, designing a jig frame; step 2, building a jig frame; step 3, hoisting the first section of bridge; step 4, hoisting a second section of bridge; step 5, finishing the mounting position of the flange; step 6, hoisting the flange; step 7, welding a flange; step 8, disassembling a sliding support and a cushion block at the position of the partition plate; step 9, pre-assembly detection is carried out; and 10, subsequent pre-assembly. The flange assembly and the integral pre-assembly are softened together, the integral accuracy of the component is ensured by controlling the accuracy of the jig frame, and the complex problem is simplified; can ensure that the bridge is assembled in advance can quick accurate location, baffle position bed-jig elevation can the quick adjustment reuse rate high, assembles in advance that detection condition is good efficient.
Description
Technical Field
The invention relates to the technical field of assembly of steel structure bridges, in particular to a quick pre-assembly method of a large-span high-precision flange connection bridge.
Background
A certain steel structure bridge transversely adopts 4 rows of U-shaped steel beams to form, the total weight of the whole bridge length is 32000 tons, 17 expansion joints are 25000 tons, and 17 expansion joints (ES 17-ES 1) are provided, wherein ES 15-ES 2 are standard joints, the length of each standard joint is 205 meters, the standard joints are divided into 5 sections, the sections are connected by inner flanges with the thickness of 80mm, and the positions of the flange connection are 8 meters away from the center line of a pier. The lateral slope of the bridge is adjusted by the thickness of the upper concrete precast slab, and the camber of the 4U-shaped bridges is required to remain approximately the same at each cross section. The full bridge is total to 316U type beam sections, and single component standard length is 44 meters, and box girder height is 2m, and the mouth width on the limit section is 3.2m, and the mouth width on the interlude is 3.8m, and bottom plate width is 2.1m, and single weight is about 75 tons. The allowable deviation of the total length between any two bridge sections in each expansion joint is required to be +/-5 mm. And (4) carrying out final inspection by adopting an accumulative pre-assembly method, wherein two pre-assemblies are required to be carried out for 252 times, and the inspection and acceptance state is two-point support at the support. According to the adjusted processing plan, 2 pre-assembly checks are completed in the pre-assembly stage on average every day. The pre-assembled field is required to be in a rain-proof and sun-proof area.
According to the bridge structure, if the flanges are welded and then assembled according to the conventional single processing and assembling process, the precision of the flanges and the dimensional precision between the component supports cannot be guaranteed, and even repeated modification and adjustment can be caused.
Disclosure of Invention
The invention aims to overcome the defects and provides a quick pre-assembly method for a large-span high-precision flange connection bridge.
In order to achieve the above object, the present invention is realized by:
a quick pre-assembly method for a large-span high-precision flange connection bridge comprises
Step 1, designing a jig frame: and designing the jig frame according to the appearance of the standard section of the bridge. The bed-jig should arrange at the baffle position to the design can be dismantled and trade sliding support and satisfy the bridge section fast speed adjusting location requirement, and sliding support will be dismantled and trade the camber change requirement that adjusts the elevation and satisfy different bridge sections. The bed-jig at the pier position should be convenient for the roughness and the elevation measurement inspection of bottom plate. The partition part uses a sliding support and a base plate as detachable parts to perform elevation adjustment and post-detachment inspection. The number of the assembly lines is determined by the number of the construction sections of the line production.
Spiral jack clamping plates are required to be additionally arranged on two sides of a jig frame at the pier position and the end part, so that the longitudinal center line of the bridge section is conveniently positioned during assembling. The end jig frame needs to be longitudinally provided with a screw jack clamping plate so as to be convenient for positioning the transverse axis of the bridge section. And installing the sliding supports of the moulding beds in place, and arranging base plates according to the camber of the bridge to be assembled.
and 4, hoisting a second section of bridge: the method comprises the following steps of hoisting a first section of bridge, and when a second section of bridge is in place, positioning the center line of a pier part by 3mm of the welding shrinkage of a flange added with the thermal expansion and cold contraction correction value of the bridge according to the temperature during assembling and the design standard temperature; the method for calculating the thermal expansion and cold contraction correction value comprises the following steps: l1= k × L × C
L1: a thermal expansion and cold contraction correction value;
k: linear expansion coefficient of steel at normal temperature;
c: when the length is measured, the difference between the component temperature and the design standard temperature is greater than the design standard temperature and takes a positive value, and the difference between the component temperature and the design standard temperature is less than the design standard temperature and takes a negative value;
step 7, welding a flange: preheating the welding part of the flange and the bridge, and arranging 4 electric welders to synchronously weld on the two sides of the flange to reduce the influence of welding deformation on the positioning of the bridge and the flange; carrying out nondestructive testing 24 hours after welding;
The invention softly combines flange assembly and integral pre-assembly together, ensures the integral precision of the component by controlling the precision of the jig frame, and simplifies the complex problem.
Can ensure that the bridge is assembled in advance and can fix a position fast accurate, baffle position bed-jig elevation can the rapid adjustment reuse rate high, assembles the detection condition in advance and is good efficient.
The method adopted by the invention can ensure that more than 80% of the area of the flange connecting surface is tightly attached, and the plugging area is not more than 15% by using a 0.2mm clearance gauge for inspection, thereby meeting the requirements of the specification and the contract.
The invention can effectively reduce the occupation time of the moulding bed and the labor and mechanical work time, and improve the pre-assembly efficiency.
Drawings
Fig. 1 is a schematic plan view of a standard section bridge.
FIG. 2 is a schematic elevation view of a standard section.
Fig. 3 is a schematic end view of a flange connection.
FIG. 4 is a schematic diagram of the pre-assembly process of the present method.
FIG. 5 is a combined axial view of a pier position with an adjusting clamp plate jig frame and a partition plate universal jig frame.
Fig. 6 is a schematic plan view of the combined supporting jig frame for pier positions.
Fig. 7 is a transverse elevation schematic view of a clamping plate supporting jig frame with a jack at a pier part.
Fig. 8 is a longitudinal elevation view of a pier portion supporting jig.
FIG. 9 is a schematic plan view of the spacer portion supporting jig.
FIG. 10 is a cross-sectional view of the spacer support jig.
Fig. 11 shows a slide bearing with a baffle.
Fig. 12 is a shoe.
Detailed Description
The invention is further illustrated by the following specific examples.
As shown in figures 1 to 12, a rapid pre-assembly method for a large-span high-precision flange connection bridge comprises
Step 1, designing a jig frame: the height marks of the bridge pier parts of the bridge are consistent, the error of the height marks of the bottom plate plane with the width of 2 meters and the length of 1.5 meters of the bridge pier parts is required to be not more than +/-1 millimeter, and the flatness of 4 square supporting seat plates with the side length of 500 millimeters distributed in the area is not more than 0.5 millimeter. The middle of a jig frame, which needs pier parts, is hollowed out in the pre-assembly state, a detection space is provided, a beam column and inclined strut combined platform is additionally provided with a sliding support with a baffle as an auxiliary positioning device, and the height of a supporting part is 1.2 m, so that bottom surface inspection operation is performed. The arching value of the partition part needs to be controlled in the assembling process, the support needs to be removed in the inspection stage, and the sliding support and the base plate are used as detachable parts for elevation adjustment and post-detachment inspection. Set up 4 and assemble line tissue line production, every support bed-jig that assembles the line and set up 3 pier positions and 21 horizontal partition positions can satisfy first and assemble the requirement with follow-up assembling.
The clamping plates of the screw jacks are required to be additionally arranged on the two sides of the moulding bed at the pier position and the end part, so that the longitudinal center line can be conveniently positioned. The end jig frame needs to be longitudinally provided with a screw jack clamping plate so as to be convenient for transverse axis positioning. And installing the sliding supports of the moulding beds in place and arranging base plates according to the arch camber of the bridge to be assembled.
and 4, hoisting a second section of bridge: the method comprises the following steps of hoisting a first section of bridge, and when a second section of bridge is in place, positioning the center line of a pier part by 3mm of the welding shrinkage of a flange added with the thermal expansion and cold contraction correction value of the bridge according to the temperature during assembling and the design standard temperature; the method for calculating the thermal expansion and cold contraction correction value comprises the following steps: l1= k × L × C
L1: a thermal expansion and cold contraction correction value;
k: linear expansion coefficient of steel at normal temperature;
c: when the length is measured, the difference between the component temperature and the design standard temperature is greater than the design standard temperature and takes a positive value, and the difference between the component temperature and the design standard temperature is less than the design standard temperature and takes a negative value;
step 7, welding a flange: preheating the welding parts of the flange and the bridge, and arranging 4 electric welders to synchronously weld at the two sides of the flange to reduce the influence of welding deformation on the positioning of the bridge and the flange; carrying out nondestructive testing 24 hours after welding;
step 9, pre-assembly detection is carried out: pre-assembly detection is carried out when only pier positions of a pre-assembled bridge are supported, an elevation measuring platform is arranged outside the middle part of the bridge by 10 meters, a steel frame is 3 meters high and 4 meters long, stand columns and the ground are fixed by expansion bolts, vertical supports are arranged on four sides, the surface of a reinforced concrete floor slab with the thickness of 120 is paved on the upper surface of the platform, the surface is not flat, and railings with the height of 1.2 meters are arranged on the periphery of the platform; the operation safety of the measuring platform is ensured, and the tripod is erected stably and does not slide; measuring the elevations of the bridge deck at the pier position and the partition plate position by using a leveling instrument on a measuring platform, measuring 3 points of the center of the partition plate and the center point of the corresponding web plate at two sides of the U-shaped groove on each cross section, and checking whether the longitudinal camber and the gradient of the cross section of the whole bridge deck meet the requirements or not; using a 2m guiding rule and a 500 mm guiding rule to check the flatness of the bottom of the pier within the range of 2m and the flatness of four corners within the range of 500 mm; arranging steel wires on the bridge floor along the longitudinal center line, measuring the distance from the bridge edge to the center line at each partition plate part, and checking the lateral bending error of the bridge; measuring the distance between the transverse center lines of the piers by using a total station instrument, recording the bridge temperature during measurement, rechecking by using a steel ruler, correcting the measured data by using the temperature difference between the bridge temperature and 25 ℃ during application, comparing the corrected measured data with the distance between the designed axes to obtain an actual error, recording the actual error, and judging that the pre-splicing is qualified when the error of the distance between the transverse center lines of the two piers is not more than +/-3 mm;
Claims (1)
1. A quick pre-assembly method for a large-span high-precision flange connection bridge comprises
Step 1, designing a jig frame: designing a jig frame according to the appearance of a standard section of the bridge;
the jig frame is arranged at the position of the partition plate, the detachable and replaceable sliding support is designed to meet the requirement of quick adjustment and positioning of the bridge section, and the elevation of the sliding support is required to be detachably adjusted to meet the requirement of camber change of different bridge sections;
the bed-jig at the pier position is convenient for measuring and checking the flatness and elevation of the bottom plate;
the partition part uses a sliding support and a base plate as detachable parts to carry out elevation adjustment and inspection after detachment;
the number of the assembly lines is determined by the number of the construction sections of the line production;
step 2, building a jig frame: taking a reinforced concrete ground with the thickness of 300 mm in a factory building as an assembly foundation, if a rainproof and sunshade shed is additionally arranged outdoors to prevent direct sunlight components and protect the components from being drenched during assembly;
using a total station with the precision of 0.5' to discharge a bridge center line and a bridge pier position transverse axis as a measurement control network;
taking roadbed boxes with the height of 200 mm, the width of 1500 mm and the length of 6000 mm as a bed-jig foundation, deviating 1m towards two sides from the transverse axis of a pier part, paving 2 roadbed boxes in parallel in the direction vertical to the center line of the bridge, and paving roadbed boxes in the position of a partition plate vertical to the center line of the bridge;
drilling four 20 mm thick steel plates of all roadbed boxes by using expansion bolts of M16;
measuring the actual elevation of the roadbed box, determining the height of a jig frame upright post according to the measured value, lengthening 10 mm blanking of the jig frame upright post, ensuring the precision by milling 5mm of each end, and connecting the jig frame upright post with the roadbed box and a jig frame cross beam in a polishing and jacking manner to control the elevation error of the jig frame top not to exceed 0.5 mm;
the spiral jack clamping plates are required to be additionally arranged on the two sides of the jig frame at the pier position and the end part, so that the longitudinal center line of the bridge section is conveniently positioned during assembling;
the end jig frame is required to be longitudinally provided with a screw jack clamping plate so as to be convenient for positioning the transverse axis of the bridge section;
installing the sliding supports of the moulding beds in place, and arranging base plates according to the arch camber of the bridge to be assembled;
step 3, hoisting the first section of bridge: hoisting a first section of bridge to an assembling position and slowly lowering the first section of bridge, stopping hooking when the remaining hoisting capacity is displayed by ninety-five percent, finely adjusting a sliding support with a baffle plate through a pier position and a screw jack at the end part of the bridge to drive the position of the bridge to align to a longitudinal center line, finely adjusting the position of the bridge to align to a transverse center line through a longitudinal screw jack of an end part jig frame, then completely placing the bridge on the jig frame through the slow hooking, and checking whether the alignment of the longitudinal center line and the transverse center line has errors or not;
practice tests show that when the jig frame bears five percent of weight, the center line centering is carried out, so that the speed adjustment is not influenced, and the center line centering error is not changed when the jig frame is unhooked;
and 4, hoisting a second section of bridge: the method comprises the following steps of hoisting a first section of bridge, and when a second section of bridge is in place, positioning the center line of a pier part by 3mm of the welding shrinkage of a flange added with the thermal expansion and cold contraction correction value of the bridge according to the temperature during assembling and the design standard temperature; the method for calculating the thermal expansion and cold contraction correction value comprises the following steps: l1= k × L × C
L1: a thermal expansion and cold contraction correction value;
k: linear expansion coefficient of steel at normal temperature;
c: when the length is measured, the difference between the component temperature and the design standard temperature is greater than the design standard temperature and takes a positive value, and is less than the design standard temperature and takes a negative value;
step 5, finishing the installation position of the flange: the flanges are arranged in the bridge pre-assembly stage, so that the flanges can be more accurately arranged, rework of error correction during pre-assembly is eliminated, 30 mm of allowance is reserved on each edge of the flange position, cutting and trimming are required during pre-assembly, and cutting lines and measuring lines 100 mm away from the flange surface are punched on the web plate and the bottom plate through a total station space positioning function after the bridges are placed according to the arching values of all partition plate parts; cutting by using a sucker type semi-automatic cutting machine, and polishing and cleaning a cut surface and a welded edge by using a polishing machine in a hand-held mode within a range of 50 mm;
step 6, hoisting the flange: tightening and hoisting matched flanges in place by using bolts, measuring the distance between the flange surface and a positioning measurement line, performing fine adjustment positioning by using wedge iron, and performing spot welding and fixing after the positioning errors of the upper part and the lower part of the flanges are in the same direction and less than 1 mm; the perpendicularity of the flange to the ground is not more than 1 mm, and the weld gaps are consistent;
step 7, welding a flange: preheating the welding part of the flange and the bridge, and arranging 4 electric welders to synchronously weld on the two sides of the flange to reduce the influence of welding deformation on the positioning of the bridge and the flange; carrying out nondestructive testing 24 hours after welding;
step 8, disassembling a sliding support and a cushion block at the position of the partition plate: after the welding line is detected to be qualified, detaching the support and the base plate at the position of the partition plate, pre-splicing the first bridge section and the second bridge section, synchronously jacking the bridge at the three bridge pier positions by 20 mm by using 6 jacks of 30 tons, sliding the sliding support out of the steel plate slideway to remove, and slowly putting down the sliding support to achieve the bearing state of only the bridge pier position supporting jig frame; only two piers are spliced in advance subsequently, and 4 jacks of 30 tons are used for jacking synchronously at the two piers;
step 9, pre-splicing detection: pre-assembly detection is carried out when only pier positions of a pre-assembled bridge are supported, an elevation measuring platform is arranged outside the middle part of the bridge by 10 meters, a steel frame is 3 meters high and 4 meters long, stand columns and the ground are fixed by expansion bolts, vertical supports are arranged on four sides, the surface of a reinforced concrete floor slab with the thickness of 120 is paved on the upper surface of the platform, the surface is not flat, and railings with the height of 1.2 meters are arranged on the periphery of the platform; the operation safety of the measuring platform is ensured, and the tripod is erected stably and does not slide; measuring the elevations of the bridge floor at the pier part and the partition plate part by using a leveling instrument on a measuring platform, measuring 3 points of the center of the partition plate and the center point of the corresponding web plate at two sides of the U-shaped groove on each cross section, and checking whether the longitudinal camber and the gradient of the cross section of the whole bridge floor meet the requirements or not; using a 2-meter guiding rule and a 500-millimeter guiding rule to check the flatness of the bottom of the pier within the range of 2 meters and the flatness of four corners within the range of 500 millimeters; arranging steel wires on the bridge floor along the longitudinal center line, measuring the distance from the bridge edge to the center line at each partition plate part, and checking the lateral bending error of the bridge; measuring the distance between the transverse center lines of the piers by using a total station instrument, recording the bridge temperature during measurement, rechecking by using a steel ruler, correcting the measured data by using the temperature difference between the bridge temperature and 25 ℃ during application, comparing the corrected measured data with the distance between the designed axes to obtain an actual error, recording the actual error, and judging that the pre-splicing is qualified when the error of the distance between the transverse center lines of the two piers is not more than +/-3 mm;
step 10, subsequent pre-assembly: the original first section of end pier supporting jig frame is used as an end temporary supporting jig frame, the supporting height is adjusted to the elevation when the first and second sections of mounting flanges are installed through a base plate, the second section is hoisted to the original first section pre-assembly position, the third section is hoisted to the original second section pre-assembly position, the in-place adjustment, the mounting flanges, the welding flanges and the inspection process are repeated, and the condition that the distance error in the length direction of the transverse center lines of the two piers and the accumulated errors of the previous sections are not more than +/-5 millimeters can be determined to be qualified when the span is inspected; the method comprises the steps of adjusting the elevation of a supporting point of a jig frame to finish assembling a flange, taking preheating and welding of the flange as an operation process, taking the time of waiting for nondestructive testing after welding as a process interval, taking the nondestructive testing as an operation process, taking final testing as an operation process, and taking 4 pre-assembling lines as 4 construction section organization line production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063402.7A CN115305826A (en) | 2022-08-31 | 2022-08-31 | Rapid pre-assembly method for large-span high-precision flange connection bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211063402.7A CN115305826A (en) | 2022-08-31 | 2022-08-31 | Rapid pre-assembly method for large-span high-precision flange connection bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115305826A true CN115305826A (en) | 2022-11-08 |
Family
ID=83864430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211063402.7A Pending CN115305826A (en) | 2022-08-31 | 2022-08-31 | Rapid pre-assembly method for large-span high-precision flange connection bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115305826A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677069A (en) * | 2016-12-28 | 2017-05-17 | 杭州江润科技有限公司 | Construction method for overall formwork one-time forming structure of pier |
| CN113931073A (en) * | 2021-11-02 | 2022-01-14 | 安徽省公路桥梁工程有限公司 | Asymmetric ultra-wide cable-stayed bridge steel box girder large cantilever flange construction method |
| WO2022156255A1 (en) * | 2021-01-25 | 2022-07-28 | 中建科工集团有限公司 | Double-deck multi-span bridge construction method |
| CN114888524A (en) * | 2021-11-26 | 2022-08-12 | 中冶(上海)钢结构科技有限公司 | Arching method for large-scale inner flange connection trestle |
-
2022
- 2022-08-31 CN CN202211063402.7A patent/CN115305826A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106677069A (en) * | 2016-12-28 | 2017-05-17 | 杭州江润科技有限公司 | Construction method for overall formwork one-time forming structure of pier |
| WO2022156255A1 (en) * | 2021-01-25 | 2022-07-28 | 中建科工集团有限公司 | Double-deck multi-span bridge construction method |
| CN113931073A (en) * | 2021-11-02 | 2022-01-14 | 安徽省公路桥梁工程有限公司 | Asymmetric ultra-wide cable-stayed bridge steel box girder large cantilever flange construction method |
| CN114888524A (en) * | 2021-11-26 | 2022-08-12 | 中冶(上海)钢结构科技有限公司 | Arching method for large-scale inner flange connection trestle |
Non-Patent Citations (3)
| Title |
|---|
| 刘义光;李广: "基于三维软件钢结构虚拟预拼装技术", 砖瓦世界, no. 021, 31 December 2021 (2021-12-31) * |
| 吕鑫;徐大州;王海兵;黄镇雄;于吉圣;: "马鞍形屋面钢结构环梁法兰盘施工技术", 施工技术, no. 1, 25 June 2017 (2017-06-25) * |
| 周伟明;: "三跨梁拱组合体系拱桥上部结构拼装施工关键技术", 铁道建筑, no. 12, 20 December 2017 (2017-12-20) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111926705A (en) | Method for integrally assembling ultra-wide framing steel box girder | |
| CN112554072B (en) | Assembling method for steel box girder of self-anchored suspension bridge | |
| CN112342922B (en) | Method for manufacturing streamline steel arch with special-shaped section box-type steel structure | |
| CN113463768A (en) | 120 m-span prestressed triangular steel pipe truss girder construction method | |
| CN114888524B (en) | Arching method for large inner flange connection trestle | |
| CN115162182B (en) | Cantilever type steel box girder high-precision cable hoisting construction method | |
| CN110576271B (en) | Installation method of sealing slideway bottom plate of sintering machine | |
| CN111706778B (en) | Construction method of dry type gas holder | |
| CN115305826A (en) | Rapid pre-assembly method for large-span high-precision flange connection bridge | |
| CN111549671A (en) | Flexible arch construction method based on through-type steel truss girder | |
| CN112609583A (en) | Steel box tied arch bridge steel structure construction system and construction method | |
| CN112984512A (en) | Method for installing drying grate | |
| CN110593085B (en) | Method for mounting steel pipes of lattice pier of bridge steel pipe | |
| CN106320186A (en) | Positioning system for pre-embedded anchor bar of arch support and construction method | |
| CN114045370A (en) | Method and device for quickly installing blast furnace body frame | |
| CN114310162B (en) | Method for manufacturing large-section whole hole of curved steel box girder | |
| CN113501105A (en) | Method for installing multipurpose heavy lift vessel supporting block box on subsection | |
| CN115431003B (en) | High-precision control method for large-span large-section inner flange connection | |
| CN115431004B (en) | Welding method for inner flange of large-span U-shaped trestle | |
| KR102668675B1 (en) | Precast bridge floor stress concentration prevention automatic supporting apparatus | |
| CN215618973U (en) | Fine adjustment frame and adjustment system for subway prefabricated plate type ballastless track | |
| CN112575133B (en) | Method for mounting jig frame of furnace body | |
| CN109930758B (en) | Inclined nuclear power station transportation channel system and construction method thereof | |
| CN116219897A (en) | Device for quickly positioning and controlling verticality of precast beam and construction method thereof | |
| CN117206826A (en) | Full-bolting arch rib double-splicing coupling manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |