CN112962464B - Floating hoisting construction method for steel tube arch rib of long-span concrete-filled steel tube tied arch bridge - Google Patents
Floating hoisting construction method for steel tube arch rib of long-span concrete-filled steel tube tied arch bridge Download PDFInfo
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- CN112962464B CN112962464B CN202110194555.4A CN202110194555A CN112962464B CN 112962464 B CN112962464 B CN 112962464B CN 202110194555 A CN202110194555 A CN 202110194555A CN 112962464 B CN112962464 B CN 112962464B
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- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Abstract
The invention provides a construction method for floating and hoisting steel tube arch ribs of a long-span concrete-filled steel tube tied arch bridge, which comprises the following steps of: customizing steel pipe arch ribs, transporting the steel pipe arch ribs, assembling the steel pipe arch ribs, arranging a support, transferring the steel pipe arch ribs, hoisting the steel pipe arch ribs, installing a supporting piece, and welding and reinforcing. The beneficial effects are that: the construction method for floating and hoisting the steel tube arch rib of the long-span concrete-filled steel tube tied arch bridge adopts a floating and hoisting method, utilizes the large hoisting capacity of the floating and hoisting crane, can divide the steel tube arch rib into two sections for hoisting, has good control on the integral line shape of the steel tube arch rib, the height difference of a steel tube interface and the like, and has strong practicability and technical advancement.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a floating crane hoisting construction method for steel tube arch ribs of a long-span concrete-filled steel tube tied arch bridge.
Background
The through concrete filled steel tube tied arch structure has the advantages of high technical content, complex construction procedures, long construction period and high construction difficulty, the construction mainly relates to key and special construction procedures such as arch springing concrete pouring, arch rib and wind bracing steel tube hoisting, arch rib steel tube concrete pressure injection and the like, the arch rib steel tube hoisting procedure is a more key procedure, and the construction difficulty is mainly embodied in the following aspects:
1. each section of hoisting unit of the steel tube arch rib (each section of arch rib steel tube is hoisted in two sections, the length of each section of arch rib steel tube is about 42m, and the weight is about 24 t) is large in volume, length and weight, and during transportation and hoisting, a pipe joint is easy to twist and deform, and certain influence is caused on the line shape of the arch rib steel tube;
2. the requirements on the closure precision of the arch rib and the integral line shape of the arch rib are high, the arch rib is influenced by more external factors (water flow, wind power, temperature and the like) in the hoisting process, and the precision control difficulty is high in the hoisting process;
3. the potential safety hazard is more, and the arch rib hoist and mount relates to many unsafe factors such as high altitude, jack-up, operation on water and interim power consumption, and the construction degree of difficulty is great.
Disclosure of Invention
The invention aims to provide a construction method for floating and hoisting a steel tube arch rib of a long-span concrete-filled steel tube tied arch bridge, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the construction method for floating hoisting of the steel tube arch rib of the long-span concrete-filled steel tube tied arch bridge comprises the following steps:
the method comprises the following steps: customizing the steel pipe arch rib, selecting a qualified and high-production-quality steel structure processing plant to produce the steel pipe arch rib, and producing the steel pipe arch rib in sections according to requirements;
step two: transporting the steel pipe arch rib, namely transporting the qualified segmented steel pipe arch rib from the steel structure processing factory to a construction site, and taking a fixing measure in the transportation process to ensure that the steel pipe arch rib is not deformed;
step three: assembling steel pipe arch ribs, namely performing trial assembly on the steel pipe arch rib pre-assembled support platform according to the requirements of a design drawing, wherein the assembled length is the length of the whole arch rib; after the assembly of the steel pipe arch rib is finished, the segmental steel pipe arch rib is welded, the quality of a welding seam must meet the design and specification requirements, and after the welding seam is qualified, the segmental steel pipe arch rib is segmented according to the requirement of a scheme;
step four: arranging a support, supporting the temporary mounting platform by using an arch rib tire seat, and placing a jack on the tire seat for adjusting the elevation of the arch rib; two sides of the 1/4 position are fixed by wind-catching ropes, so that the transverse position of the arch rib can be conveniently adjusted; a temporary support is erected at the closure section of the steel pipe arch rib so that the steel pipe arch rib is accurately positioned, and then the arch rib is fixed so as to facilitate construction such as welding and the like;
step five: transferring the steel pipe arch ribs, conveying the segmented steel pipe arch ribs to a wharf from a pre-assembly site by using a gun carriage, and then hoisting the segmented steel pipe arch ribs to a construction site by using a floating crane;
step six: hoisting the steel pipe arch rib, in the hoisting process, measuring and tracking operation is carried out by using a total station instrument, the accurate installation position is ensured, the elevation and the axis position of a joint are observed to control and adjust the arch axis of the joint so as to meet the design requirement, and the two sections are spliced and are relatively well controlled;
step seven: mounting a support piece, immediately checking the elevation and the mounting axis after the two sections of steel pipe arch ribs are in place, timely mounting transverse and oblique wind braces to increase the transverse rigidity after no error exists, resisting deformation caused by temperature or other reasons, and fixing by using a code plate and profile steel after adjustment is finished (the joint of a closure section is temporarily connected by the code plate and a bolt) to ensure that the elevation and the line shape meet the requirements;
step eight: and (4) welding and reinforcing, wherein after two steel pipe arch ribs are accurately folded, each connector is provided with two electric welders, and the two electric welders are symmetrically and continuously operated at the same time until all the steel pipe arch ribs are welded.
Preferably, in the third step, after the trial assembly is put in place, checking is carried out, and if the error exceeds the allowable range, measures are taken for correction until the error is qualified.
Preferably, in the sixth step, considering the symmetry of the arch ribs, two arch ribs of the half-bridge must be continuously completed, and wind braces are installed in time to prevent the single-side arch ribs from shifting due to temperature changes, and after one arch rib is fixed in place, the floating crane immediately hangs the second arch rib.
Compared with the prior art, the invention has the beneficial effects that:
1. the construction method for hoisting the steel tube arch rib of the long-span steel tube concrete tied arch bridge by the floating crane adopts the floating crane method, utilizes the large hoisting capacity of the floating crane, can divide the steel tube arch rib into two sections for hoisting, has good control over the integral line shape of the steel tube arch rib, the height difference of a steel tube interface and the like, and has strong practicability and technical advancement;
2. the construction method for floating and hoisting the steel tube arch ribs of the long-span concrete-filled steel tube tied arch bridge, which is provided by the invention, utilizes the convenient conditions of a river channel, transports and hoists the steel tube arch ribs by using the floating crane, only sets one support in the span, saves a lot of supports compared with other methods, and has simple construction procedures and convenient operation;
3. the construction method for floating and hoisting the steel tube arch rib of the long-span concrete-filled steel tube tied arch bridge, disclosed by the invention, has the advantages that the hoisting capacity of the floating crane is large, the steel tube arch rib is divided into two sections for hoisting and combining, the overhead welding and operation are reduced, the safety risk is reduced, and the floating crane is safe and reliable due to the fact that the floating crane operates on water but the hoisting capacity is more limited than the crane in land operation space;
4. the construction method for hoisting the steel tube arch rib of the long-span steel tube concrete tied arch bridge by the floating crane has the advantages that the hoisting capacity of the floating crane is high, the steel tube arch rib can be hoisted in two sections, and compared with other methods, the construction method can save time and shorten the construction period.
Drawings
FIG. 1 is a flow chart of the construction process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the construction method for floating hoisting of the steel tube arch rib of the long-span concrete-filled steel tube tied arch bridge is characterized by comprising the following steps of:
the method comprises the following steps: customizing the steel tube arch rib, selecting a qualified and high-quality steel structure processing factory to produce the steel tube arch rib, and producing the steel tube arch rib in sections according to requirements;
step two: transporting the steel tube arch rib, namely transporting the qualified segmental steel tube arch rib from the steel structure processing factory to a construction site, and taking a fixing measure in the transportation process to ensure that the steel tube arch rib is not deformed;
step three: assembling steel pipe arch ribs, performing trial assembly on the steel pipe arch rib pre-assembled support platform according to the requirements of a design drawing, wherein the assembled length is the length of the whole arch rib, performing check and check after trial assembly is in place, if the error exceeds an allowable range, taking measures to correct until the steel pipe arch rib is qualified, welding segmented steel pipe arch ribs after the steel pipe arch rib assembly is finished, wherein the quality of welding seams must meet the requirements of design and specification, and segmenting the steel pipe arch ribs according to the requirements of a scheme after the welding seams are qualified;
step four: arranging a support, supporting the temporary mounting platform by using an arch rib tire seat, and placing a jack on the tire seat for adjusting the elevation of the arch rib; two sides of the 1/4 position are fixed by wind-catching ropes, so that the transverse position of the arch rib can be conveniently adjusted; a temporary support is erected at the closure section of the steel pipe arch rib so that the steel pipe arch rib is accurately positioned, and then the arch rib is fixed so as to facilitate construction such as welding and the like;
step five: transferring the steel pipe arch ribs, conveying the segmented steel pipe arch ribs to a wharf from a pre-assembly site by using a gun carriage, and then hoisting the segmented steel pipe arch ribs to a construction site by using a floating crane;
step six: hoisting steel pipe arch ribs, in the hoisting process, measuring and tracking operation is carried out by using a total station instrument, the accurate installation position is ensured, the joint elevation and the axis position are observed to control and adjust the arch axis of the steel pipe arch ribs to meet the design requirements, because two sections are spliced and relatively well controlled, two arch ribs of a half-bridge are required to be continuously finished by considering the symmetry of the arch ribs, and wind braces are installed in time to avoid the deviation of the arch ribs on one side caused by temperature change, and after one arch rib is in place and fixed, a floating crane immediately hoists the second arch rib;
step seven: mounting a support piece, immediately checking the elevation and the mounting axis after two sections of steel pipe arch ribs are in place, timely mounting transverse and inclined wind braces to increase the transverse rigidity after no errors exist, resisting deformation caused by temperature or other reasons, and fixing by using a stacking plate and profile steel after adjustment is finished (the folding section joint is temporarily connected by using the stacking plate and a bolt) so as to ensure that the elevation and the line shape meet the requirements;
step eight: and (4) welding and reinforcing, wherein after two steel pipe arch ribs are accurately folded, each connector is provided with two electric welders, and the two electric welders are symmetrically and continuously operated at the same time until all the steel pipe arch ribs are welded.
The working principle is as follows: the steel pipe arch rib is transported to a construction site in sections from a processing plant, after trial splicing, welding and segmentation are carried out strictly according to requirements, the steel pipe arch rib is transported to a wharf from a pre-splicing site by a gun carriage, then the steel pipe arch rib is lifted by a floating crane to be in place, the 84m long steel pipe arch rib can be lifted in two sections by utilizing the characteristic of large lifting capacity of the floating crane, the times of high-altitude welding and splicing are reduced, and the problems that the accuracy and the linear control of the steel pipe arch rib are difficult and the like in the lifting process are effectively solved by adopting a process linear control technology.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The construction method for floating hoisting of the steel tube arch rib of the long-span concrete-filled steel tube tied arch bridge is characterized by comprising the following steps of:
the method comprises the following steps: customizing the steel pipe arch rib, selecting a qualified and high-production-quality steel structure processing plant to produce the steel pipe arch rib, and producing the steel pipe arch rib in sections according to requirements;
step two: transporting the steel pipe arch rib, namely transporting the qualified segmented steel pipe arch rib from the steel structure processing factory to a construction site, and taking a fixing measure in the transportation process to ensure that the steel pipe arch rib is not deformed;
step three: assembling steel pipe arch ribs, namely performing trial assembly on the steel pipe arch rib pre-assembled support platform according to the requirements of a design drawing, wherein the assembled length is the length of the whole arch rib; after the assembly of the steel pipe arch rib is finished, the segmental steel pipe arch rib is welded, the quality of a welding seam must meet the design and specification requirements, and after the welding seam is qualified, the segmental steel pipe arch rib is segmented according to the requirement of a scheme;
step four: arranging a support, supporting the temporary mounting platform by using an arch rib tire seat, and placing a jack on the tire seat for adjusting the elevation of the arch rib; two sides of the 1/4 position are fixed by wind-pulling ropes, so that the transverse position of the arch rib can be conveniently adjusted; a temporary support is erected at the closure section of the steel pipe arch rib so that the steel pipe arch rib is accurately positioned, and then the arch rib is fixed so as to facilitate welding construction;
step five: transferring the steel pipe arch ribs, conveying the segmented steel pipe arch ribs to a wharf from a pre-assembly site by using a gun carriage, and then hoisting the segmented steel pipe arch ribs to a construction site by using a floating crane;
step six: hoisting the steel pipe arch rib, in the hoisting process, measuring and tracking operation is carried out by using a total station instrument, the accurate installation position is ensured, the elevation and the axis position of a joint are observed to control and adjust the arch axis of the joint so as to meet the design requirement, and the two sections are spliced and are relatively well controlled;
step seven: mounting a support piece, immediately checking the elevation and the mounting axis after the two sections of steel pipe arch ribs are in place, timely mounting transverse and inclined wind braces to increase the transverse rigidity after no errors exist, resisting deformation caused by temperature or other reasons, and fixing by using a flat plate and profile steel after adjustment is finished so as to ensure that the elevation and the line shape meet the requirements;
step eight: and (4) welding and reinforcing, wherein after two steel pipe arch ribs are accurately folded, each connector is provided with two electric welders, and the two electric welders are symmetrically and continuously operated at the same time until all the steel pipe arch ribs are welded.
2. The floating hoisting construction method for the steel tube arch rib of the long-span steel tube concrete tied arch bridge according to claim 1, which is characterized in that: in the third step, after the assembly is put in place, checking is carried out, and if the error exceeds the allowable range, measures are taken for correction until the error is qualified.
3. The floating hoisting construction method for the steel tube arch rib of the long-span steel tube concrete tied arch bridge according to claim 1, which is characterized in that: and step six, considering the symmetry of the arch ribs, continuously finishing the two arch ribs of the half-bridge, installing wind braces in time to avoid the deviation of the arch ribs on one side caused by temperature change, and immediately hoisting the second arch rib by the floating crane after one arch rib is in place and fixed.
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| CN202110194555.4A CN112962464B (en) | 2021-02-21 | 2021-02-21 | Floating hoisting construction method for steel tube arch rib of long-span concrete-filled steel tube tied arch bridge |
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| CN202110194555.4A CN112962464B (en) | 2021-02-21 | 2021-02-21 | Floating hoisting construction method for steel tube arch rib of long-span concrete-filled steel tube tied arch bridge |
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| CN202969246U (en) * | 2012-12-13 | 2013-06-05 | 中铁四局集团第二工程有限公司 | Semi-stride hoisting bowstring arch bridge |
| CN105672134A (en) * | 2016-01-26 | 2016-06-15 | 河海大学 | Through concrete-filled steel tube tied-arch bridge erection construction method |
| CN107905116B (en) * | 2017-12-19 | 2019-05-31 | 中机建重工有限公司 | Construction method of large-span through type rigid tied steel arch bridge |
| CN109736179B (en) * | 2019-01-23 | 2021-01-01 | 中铁十局集团第四工程有限公司 | Assembled construction method for tied arch bridge |
| CN111636306B (en) * | 2020-06-03 | 2022-06-03 | 中铁上海工程局集团有限公司 | Construction method for sectional assembly and integral lifting of large-span steel box arch rib |
| CN111794119B (en) * | 2020-07-31 | 2024-06-11 | 中铁大桥局上海工程有限公司 | Temporary supporting system and hoisting method for basket type steel box tie bar arch |
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