CN115162199A - Steel box girder segment field installation accurate positioning device and construction method - Google Patents
Steel box girder segment field installation accurate positioning device and construction method Download PDFInfo
- Publication number
- CN115162199A CN115162199A CN202211003419.3A CN202211003419A CN115162199A CN 115162199 A CN115162199 A CN 115162199A CN 202211003419 A CN202211003419 A CN 202211003419A CN 115162199 A CN115162199 A CN 115162199A
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- steel box
- box girder
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- positioning device
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The application relates to a steel box girder segment field installation accurate positioning device and a construction method, and belongs to the technical field of steel box girder field installation auxiliary construction equipment. A steel box girder segment field installation accurate positioning device comprises a support frame fixedly arranged on the ground, a lifting base arranged at the top of the support frame and an adjusting platform arranged on the lifting base; the adjusting platform comprises a servo motor, a first screw rod parallel to the upper surface of the lifting base, a second screw rod parallel to the upper surface of the lifting base and arranged on the first screw rod, supporting sliders arranged at two ends of the first screw rod and arranged at two ends of the second screw rod, and a sliding rail arranged on the upper surface of the lifting base, wherein the supporting sliders are sleeved at two ends of the first screw rod and arranged at two ends of the second screw rod. The assembling tool has the advantages of time and labor saving and high assembling precision.
Description
Technical Field
The application relates to the technical field of auxiliary construction equipment for field installation of steel box girders, in particular to a device for accurately positioning field installation of steel box girder segments and a construction method.
Background
The steel box girder is also called steel plate box girder, and is a common structural form of a large-span bridge. Steel box girders are often used in the load-bearing structure of large-span bridges and are named as steel box girders because they are shaped like boxes. The steel box girder is generally assembled and constructed in a mode of prefabricating segment bodies in a factory and carrying out on-site hoisting butt welding, so that the steel box girder has great advantages in the aspect of saving labor hours compared with other bridge supporting structure construction methods.
In the field installation of the steel box girder segments, hoisting equipment is needed to hoist the steel box girder segments to the top of the bearing pile of the bridge, and then butt welding is carried out on the adjacent steel box girder segments. In fact, due to construction errors and limitations of welding processes, small gaps caused by position deviation inevitably occur when the steel box girder segments are aligned, and the small gaps are difficult to directly adjust through hoisting equipment. The existence of the micro gap can cause adverse effects on the welding quality of the steel box girder segment and the integral bearing performance of the bridge.
Against the background of the related art mentioned above, the inventor believes that there is a need for an apparatus capable of performing precise position adjustment on steel box girder segments to improve the welding quality and the overall bearing capacity of the steel box girder.
Disclosure of Invention
In order to improve the welding quality and the integral bearing capacity of the steel box girder, the application provides a steel box girder segment field installation accurate positioning device and a construction method.
First aspect, the application provides a steel box girder segment section field installation accurate positioning device adopts following technical scheme:
an accurate positioning device for on-site installation of a steel box girder segment comprises a support frame fixedly arranged on the ground, a lifting base arranged at the top of the support frame and an adjusting platform arranged on the lifting base; the adjusting platform comprises a servo motor, a first screw rod arranged in parallel with the upper surface of the lifting base, a second screw rod arranged in parallel with the upper surface of the lifting base and the first screw rod, supporting slide blocks sleeved at two ends of the first screw rod and two ends of the second screw rod, a connecting plate sleeved on the first screw rod and the second screw rod and a slide rail arranged on the upper surface of the lifting base; the servo motor is connected with the first screw rod; the first screw is in chain transmission connection with the second screw; the supporting slide block is connected with the slide rail in a sliding manner; the supporting sliding block is rotationally connected with the first screw rod and the second screw rod.
By adopting the technical scheme, the supporting frame provides a supporting and stabilizing effect for the installation and fixation of the steel box girder, and provides a position for the installation of the lifting base, the lifting base provides a position for the installation of the adjusting platform, and simultaneously has a function of accurately adjusting the position of the steel box girder in the vertical direction, the servo motor in the adjusting platform arranged on the lifting base provides power for the operation of the adjusting platform, the supporting slide block provides a supporting effect for the installation and the operation of the first screw rod and the second screw rod, the sliding connection structure of the supporting slide block and the slide rail can drive the first screw rod and the second screw rod to move in the direction perpendicular to the axis of the first screw rod, so that the position of the steel box girder in the direction perpendicular to the axis of the first screw rod can be accurately adjusted, the thread matching structure of the first screw rod, the second screw rod and the connecting plate can accurately adjust the position of the steel box girder in the direction parallel to the axis of the first screw rod, so far, the positions in six directions in the space of the steel box girder can be finely adjusted according to the actual situation, and the purposes of improving the welding quality of the steel box girder and the whole bearing capacity are achieved.
Optionally, the upper surface of the connecting plate is detachably connected with a plurality of limiting rods.
Through adopting above-mentioned technical scheme, install a plurality of gag lever posts on the connecting plate and played the effect that the position was injectd to the steel box girder, the gag lever post structure has improved the attitude stability of steel box girder in the motion process, has further reduced the construction error in the steel box girder welding process, has improved construction quality.
Optionally, a plurality of extension cylinders are symmetrically arranged on the edges of the two sides of the connecting plate; the extension cylinder is sleeved on the first screw rod and the second screw rod.
Through adopting above-mentioned technical scheme, the extension section of thick bamboo that connecting plate both sides edge symmetry set up can increase the screw-thread fit connection length of connecting plate and first screw rod or second screw rod, has improved the stability in the connecting plate motion process, has also increased the bearing capacity of connecting plate simultaneously, has increased the application scope of this application.
Optionally, one side of the supporting slide block is rotatably connected with a tension wheel; the tension wheel is meshed with a transmission chain between the first screw and the second screw.
By adopting the technical scheme, the tensioning wheel structure arranged on one side of the supporting slide block is meshed with the chain between the first screw and the second screw, so that the tensioning effect is achieved on the chain transmission structure of the first screw and the second screw, the possibility of asynchronous rotation between the first screw and the second screw is reduced, and the stability of the steel box girder in the position adjusting process is further improved.
Optionally, the lifting base comprises a plurality of hydraulic cylinders arranged at the top of the support frame and a plurality of bottom plates fixedly connected with the telescopic ends of the hydraulic cylinders.
Through adopting above-mentioned technical scheme, the pneumatic cylinder has played the effect of supporting and providing power to the lift of bottom plate, and the bottom plate has played the supporting role to the installation of adjusting the platform.
Optionally, the bottom plate is perpendicular to the two side edges of the slide rail and is provided with a limit baffle.
By adopting the technical scheme, the limit baffles arranged at the edges of the two sides of the bottom plate play a role in limiting and blocking the movement of the connecting plate.
Optionally, a plurality of rollers are rotatably connected to the supporting slider near the plane of one side of the lifting base.
Through adopting above-mentioned technical scheme, the one end that the supporting slide is close to the lifting pedestal rotates a plurality of gyro wheels of connecting and can convert the sliding friction between supporting slide and the lifting pedestal into rolling friction, reduces relative frictional force, and reducing wear reduces the energy consumption.
Optionally, one end of the support frame close to the ground is provided with a plurality of auxiliary support legs.
Through adopting above-mentioned technical scheme, a plurality of auxiliary leg that the support frame is close to ground one end installation can increase the stability of support frame.
Optionally, the auxiliary leg is rotatably connected to the support frame.
Through adopting above-mentioned technical scheme, rotate the structural design who is connected between auxiliary leg and the support frame and make the support frame under non-operating condition, auxiliary leg can be packed up to the position with the support frame laminating, has reduced the space of support frame and has taken, has improved the portability of support frame.
In a second aspect, the application provides a method for installing and constructing a steel box girder segment on site, which applies the above-mentioned device for accurately positioning the steel box girder segment on site, and adopts the following technical scheme:
a steel box girder segment field installation construction method comprises the following steps:
step 1: cleaning the welding end face of the steel box girder segment to be assembled, and hoisting the steel box girder segment on the corresponding bridge bearing pile;
and 2, step: a support frame is built below the steel box girder segment, and the lifting base and the adjusting platform are installed on the support frame;
and 3, step 3: controlling the lifting base to rise to enable the upper surface of the connecting plate to be abutted to the lower surface of the steel box girder segment, and inserting the limiting rod into the limiting hole corresponding to the lower surface of the steel box girder segment;
and 4, step 4: controlling the lifting platform to enable the welding end surfaces of the two steel box girder segments to be welded to contact, and finely adjusting the lifting base again after the two steel box girder segments are contacted so that the upper surfaces of the two steel box girder segments are at the same height;
and 5: the steel box girder segments are welded and assembled, and the adjusting platform, the lifting base and the supporting frame are disassembled when the strength of the welded structure reaches the design requirement.
By adopting the technical scheme, a user can adjust the position of the steel box girder which is hoisted and placed on the bearing pile of the bridge by means of the steel box girder position adjusting device, so that micro gaps of two adjacent steel box girders caused by hoisting, welding assembly precision, pile foundation construction errors and the like are reduced or even eliminated, and the purposes of improving the welding quality and the integral bearing capacity of the steel box girders are achieved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the support frame in the application provides a supporting and stabilizing effect for the installation and the fixation of the application, and simultaneously provides a position for the installation of the lifting base, the lifting base provides a position for the installation of the adjusting platform, and simultaneously has a function of accurately adjusting the position of the steel box girder in the vertical direction, a servo motor in the adjusting platform installed on the lifting base provides power for the operation of the adjusting platform, the support slider provides a supporting effect for the installation and the operation of the first screw rod and the second screw rod, the sliding connection structure of the support slider and the sliding rail can drive the first screw rod and the second screw rod to move in the direction perpendicular to the axis of the first screw rod, so that the position of the steel box girder in the direction perpendicular to the axis of the first screw rod can be accurately adjusted, the thread matching structure of the first screw rod, the second screw rod and the connecting plate can accurately adjust the position of the steel box girder in the direction parallel to the axis of the first screw rod, and the positions in six directions in the space of the steel box girder can be finely adjusted according to actual conditions, and the invention aims of improving the welding quality and the whole bearing capacity of the steel box girder can be achieved.
2. The chain meshing between the tensioning wheel structure of installing in support slider one side and first screw rod and the second screw rod in this application has played the tensioning to the chain drive structure of first screw rod and second screw rod, has reduced the possibility that unsynchronized rotation appears between first screw rod and the second screw rod, has further promoted the stability of steel case roof beam in the position control process.
3. The structural design who rotates between auxiliary leg and the support frame and be connected in this application makes the support frame when under non-operating condition, and auxiliary leg can be packed up to the position with the support frame laminating, has reduced the space of support frame and has occupy, has improved the portability of support frame.
Drawings
Fig. 1 is a schematic structural diagram of a field installation accurate positioning device for a steel box girder segment disclosed in an embodiment of the application.
Fig. 2 is a partially enlarged view of a point a in fig. 1.
Description of reference numerals: 1. a support frame; 11. an auxiliary leg; 2. a lifting base; 21. a hydraulic cylinder; 22. a base plate; 221. a limiting baffle; 3. adjusting the platform; 31. a servo motor; 32. a first screw; 33. a second screw; 34. a support slide block; 35. a connecting plate; 36. a slide rail; 341. a roller; 342. a tension wheel; 351. a limiting rod; 352. the cartridge is extended.
Detailed Description
The present application is described in further detail below with reference to fig. 1-2.
The steel box girder is a large-span bridge bearing girder similar to a box in shape, is usually prefabricated in a factory and then subjected to hoisting butt welding on site, and has the advantages of good bearing effect, short installation period and the like. However, due to the limitation of the production process and the existence of construction errors, two adjacent steel box girders always have a tiny gap during butt welding, and if the two adjacent steel box girders are not processed, the welding quality and the bearing capacity of the whole pair of bridges are negatively affected. In order to improve the welding quality and the integral bearing capacity of the steel box girder, the application provides a device for accurately positioning the steel box girder segment in field installation and a construction method.
The embodiment of the application discloses a steel box girder segment field installation accurate positioning device. Referring to fig. 1 and 2, the accurate positioning device for the field installation of the steel box girder segment comprises a support frame 1, a lifting base 2 and an adjusting platform 3. The supporting frame 1 is perpendicular to the ground and is installed between two adjacent bridge bearing piles, the lifting base 2 is fixedly installed at one end, far away from the ground, of the supporting frame 1 in a bolt connection mode, and the adjusting platform 3 is fixedly installed on the upper surface of the lifting base 2 in a bolt connection mode.
Referring to fig. 1, the support frame 1 may be a metal frame formed by welding a plurality of groups of angle steels and channel steels in a matching manner, four auxiliary legs 11 are installed at one end of the support frame 1 close to the ground in a rotating connection manner, and the four auxiliary legs 11 are respectively located at four corners of the support frame 1. Auxiliary leg 11 can take place relative rotation with between the support frame 1, can provide more firm support for support frame 1 when there is the user demand, again can rotate to the space in the transportation and occupy less position.
Referring to fig. 1, the lifting base 2 includes a hydraulic cylinder 21 and a base plate 22. Wherein, the pneumatic cylinder 21 passes through bolted connection's mode fixed mounting at the top of support frame 1, and the flexible direction of pneumatic cylinder 21 is perpendicular with ground. The number of the hydraulic cylinders 21 is four, and the hydraulic cylinders are respectively positioned at four corners of the top of the support frame 1 so as to achieve the effect of stable support. The bottom plate 22 may be a solid rectangular metal plate, and the bottom plate 22 is fixedly connected with the telescopic end of the hydraulic cylinder 21 by welding. The two side edges of the bottom plate 22 are provided with limit baffles 221 by integral casting. The upper surface of the limit stop 221 is higher than the upper surface of the bottom plate 22.
Referring to fig. 1 and 2, the adjustment platform 3 includes a servo motor 31, a first screw 32, a second screw 33, a support slider 34, a connection plate 35, and a slide rail 36. The slide rail 36 is mounted on the upper surface of the bottom plate 22 in a direction perpendicular to the limit stop 221 by means of a bolt connection. The first screw 32 and the second screw 33 are disposed along a direction parallel to the bottom plate 22, and the first screw 32 and the second screw 33 are parallel to each other and perpendicular to the slide rail 36. Two ends of the first screw rod 32 and the second screw rod 33 are respectively sleeved with a supporting slide block 34. The supporting slide block 34 is rotatably connected with the first screw rod 32 and the second screw rod 33, and the supporting slide block 34 is slidably connected with the slide rail 36. The roller 341 is installed at the bottom of the supporting slider 34 by a rotation connection. The first screw 32 and the second screw 33 are fixed between the supporting slide blocks 34 on the same side by welding through a rectangular metal connecting rod. The first screw 32 is connected with the second screw 33 in a chain transmission manner. The first screw 32 is coupled to the power output shaft of the servo motor 31 through a coupling. The bottom of the supporting slide block 34 is provided with a tension wheel 342 in a rotating connection mode, and the tension wheel 342 is meshed with and tightly propped against the outer side of the transmission chain between the first screw rod 32 and the second screw rod 33, so that the function of tensioning the chain is achieved. The connecting plate 35 may be a rectangular solid metal plate with two parallel threaded holes. Two threaded holes on the connecting plate 35 are respectively penetrated by the first screw 32 and the second screw 33. A plurality of stopper rods 351 are vertically welded to the upper surface of the connecting plate 35. The limiting rod 351 can be a circular solid metal cylinder, and the limiting rod 351 is inserted into a limiting hole in the corresponding position of the steel box girder to limit the movement of the steel box girder. The side of the connecting plate 35 is provided with an extension cylinder 352 in a welding mode, and the extension cylinder 352 is sleeved on the first screw rod 32 and the second screw rod 33, so that the effect of increasing the length of thread fit and improving the stability is achieved.
The embodiment of the application discloses a steel box girder segment field installation accurate positioning device and a construction method, and the device comprises the following steps:
step 1: and (4) cleaning the welding end face of the steel box girder segment to be assembled, and hoisting the steel box girder segment on the corresponding bridge bearing pile.
In the step, substances which can affect welding, such as rust impurities on the welding plane of the steel box girder, need to be cleaned up, and the high-altitude operation is reduced by firstly cleaning and then hoisting.
Step 2: a support frame 1 is built below a steel box girder segment, and a lifting base 2 and an adjusting platform 3 are installed on the support frame 1.
In the step, the construction height of the support frame 1 is determined according to the actual landmark condition and the pile height, and the stability and the anti-interference capability are simply tested after construction is completed.
And step 3: the lifting base 2 is controlled to ascend so that the upper surface of the connecting plate 35 is abutted to the lower surface of the steel box girder segment, and the limiting rod 351 is inserted into the corresponding limiting hole in the lower surface of the steel box girder segment.
In this step, care should be taken to clean the upper surface of the connecting plate 35 to prevent other impurities on the contact surface of the steel box girder and the connecting plate 35 from affecting the surface finish.
And 4, step 4: and controlling the lifting platform to enable the welding end surfaces of the two steel box girder segments to be welded to contact, and finely adjusting the lifting base 2 again after the two steel box girder segments contact to enable the upper surfaces of the two steel box girder segments to be at the same height.
In this step, the telescopic height of the lifting platform should be readjusted with reference to whether the upper surfaces of the two adjacent steel box girders coincide.
And 5: the steel box girder sections are welded and assembled, and the adjusting platform 3, the lifting base 2 and the support frame 1 are disassembled when the strength of a welded structure meets the design requirement.
In this step, the disassembly should be started after the strength of the welded structure meets the requirement of support evacuation, and before the disassembly, hoisting equipment is required to intervene and perform hoisting auxiliary support.
The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211003419.3A CN115162199A (en) | 2022-08-19 | 2022-08-19 | Steel box girder segment field installation accurate positioning device and construction method |
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| CN202211003419.3A CN115162199A (en) | 2022-08-19 | 2022-08-19 | Steel box girder segment field installation accurate positioning device and construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335031A (en) * | 2022-11-02 | 2023-06-27 | 浙江交工集团股份有限公司 | A steel box girder hoisting system |
| CN117026838A (en) * | 2023-08-02 | 2023-11-10 | 山东高速建设管理集团有限公司 | Large-span steel box girder hoisting construction device and method based on three-dimensional laser scanning |
| CN117051703A (en) * | 2023-08-01 | 2023-11-14 | 中交一公局第三工程有限公司 | A small-section steel box beam installation structure and its construction technology |
| CN117263076A (en) * | 2023-09-15 | 2023-12-22 | 北京城建北方设备安装有限责任公司 | A tube well distribution box installation auxiliary device |
| CN117604924A (en) * | 2023-12-29 | 2024-02-27 | 北京市市政六建设工程有限公司 | A kind of steel box girder assembly equipment spanning multiple roads |
| CN117802897A (en) * | 2023-12-29 | 2024-04-02 | 北京市政建设集团有限责任公司 | A steel box girder on-site installation bracket |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335031A (en) * | 2022-11-02 | 2023-06-27 | 浙江交工集团股份有限公司 | A steel box girder hoisting system |
| CN117051703A (en) * | 2023-08-01 | 2023-11-14 | 中交一公局第三工程有限公司 | A small-section steel box beam installation structure and its construction technology |
| CN117026838A (en) * | 2023-08-02 | 2023-11-10 | 山东高速建设管理集团有限公司 | Large-span steel box girder hoisting construction device and method based on three-dimensional laser scanning |
| CN117263076A (en) * | 2023-09-15 | 2023-12-22 | 北京城建北方设备安装有限责任公司 | A tube well distribution box installation auxiliary device |
| CN117604924A (en) * | 2023-12-29 | 2024-02-27 | 北京市市政六建设工程有限公司 | A kind of steel box girder assembly equipment spanning multiple roads |
| CN117802897A (en) * | 2023-12-29 | 2024-04-02 | 北京市政建设集团有限责任公司 | A steel box girder on-site installation bracket |
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