CN112281685B - Lifting construction method of steel arch structure - Google Patents
Lifting construction method of steel arch structure Download PDFInfo
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- CN112281685B CN112281685B CN202011151643.8A CN202011151643A CN112281685B CN 112281685 B CN112281685 B CN 112281685B CN 202011151643 A CN202011151643 A CN 202011151643A CN 112281685 B CN112281685 B CN 112281685B
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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
- E01D21/10—Cantilevered erection
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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
- E01D19/00—Structural or constructional details of 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
- E01D4/00—Arch-type 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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention provides a lifting construction method of a steel arch structure, and relates to the field of lifting of steel arch structures. The lifting construction method of the steel arch structure comprises the following steps: step one, presetting a first lifting tower and a second lifting tower at a construction position; selecting a first connecting point and a second connecting point which are positioned on a horizontal line and connecting a horizontal tensioning rope; connecting a first lifting rope between the first connecting point and the first lifting tower, and connecting a second lifting rope between the second connecting point and the second lifting tower; selecting a tangent line L of the steel arch structure at a second connecting point, and measuring an included angle alpha between the tangent line L at the second connecting point and a horizontal line; step five, determining that the lifting force of the first lifting rope and the lifting force of the second lifting rope are both F, adjusting the tension force of the horizontal tension rope to be T, enabling the resultant force of the lifting force F and the tension force T to be W, and enabling the included angle between the direction of the resultant force W and the horizontal line to be equal to alpha; and step six, synchronously loading until the butt joint is formed.
Description
Technical Field
The invention relates to the technical field of steel arch structure lifting, in particular to a lifting construction method of a steel arch structure.
Background
During large-scale building construction, for example, during the hoisting process of the upper cover of a stadium or the arch rib structure of the steel arch bridge, the installation height is ten meters, the structure weight can reach thousands of tons, and the subsequent installation precision can be seriously influenced by the tiny deformation of the steel arch structure during the installation process.
In order to prevent the deformation of the steel arch structure during the lifting process, a Chinese patent application with application publication No. CN102777043A and application publication No. 2012.11.14 is developed later, and discloses a lifting construction method for the arch structure in a zero deformation state, which specifically comprises the following steps: segmenting a large-span arch structure into a landing part arch structure and a lifting construction unit; erecting a supporting jig frame, assembling and lifting the construction unit in situ, and installing an arch structure of a landing part; installing horizontal steel strands and horizontal jacks, tensioning the horizontal jacks, and tensioning the horizontal steel strands; erecting a lifting frame, and installing a lifting jack and a vertical lifting steel strand; tensioning the horizontal steel strands and the vertical lifting steel strands alternately in a grading manner to enable the lifting construction unit to be separated from the supporting jig frame; lifting the lifting construction unit to a preset height, and butting the lifting construction unit with the floor part arch structures on two sides to form a large-span arch structure; seventhly, unloading in stages, removing the horizontal jack, the horizontal steel strand, the lifting jack, the vertical lifting steel strand and the lifting frame, and finishing construction.
In the lifting construction method of the arch structure in the zero deformation state in the prior art, the horizontal steel strand and the vertical lifting steel strand are stretched to perform trial lifting, and the horizontal steel strand is subjected to supplementary tensioning according to the deformation measurement values of two end points of the lifting construction unit, so that the lifting construction unit is ensured not to deform during formal lifting. However, the lifting construction method needs early trial lifting construction, and the tensioning of the horizontal steel strand is adjusted according to a trial lifting result, so that the problems that the arched structure is easy to deform after trial lifting and the construction process is complicated exist.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a lifting construction method of a steel arch structure, so as to solve the problems that the steel arch structure is easy to deform and the construction process is complicated after the steel arch structure is lifted in a trial mode in the conventional lifting construction method.
The technical scheme of the lifting construction method of the steel arch structure comprises the following steps:
the lifting construction method of the steel arch structure comprises the following steps:
step one, determining a construction position of a steel arch structure, presetting a first lifting tower and a second lifting tower at the construction position, and installing arch feet in place in sections;
selecting a first connecting point and a second connecting point which are positioned on a horizontal line on the steel arch structure, and connecting a horizontal tensioning rope between the first connecting point and the second connecting point;
connecting a first lifting rope between the first connecting point and the first lifting tower, and connecting a second lifting rope between the second connecting point and the second lifting tower;
selecting a tangent line L of the steel arch structure at the second connecting point, and measuring an included angle alpha between the tangent line L at the second connecting point and a horizontal line;
step five, determining that the lifting force of the first lifting rope and the lifting force of the second lifting rope are both F, adjusting the tension force of the horizontal tensioning rope to be T, enabling the resultant force of the lifting force F and the tension force T to be W, and enabling the included angle between the direction of the resultant force W and the horizontal line to be equal to alpha;
and step six, synchronously loading the lifting force of the first lifting rope and the lifting force of the second lifting rope which are both F according to the tension force of the horizontal tensioning rope as T until the steel arch structure is lifted to form butt joint with the arch springing sections.
Further, in step one, the preset positions of the first lifting tower and the second lifting tower are determined according to the transverse span of the steel arch structure.
Further, in the second step, one end of the steel arch structure is selected as a first connection point, and the other end of the steel arch structure is selected as a second connection point.
Further, in step five, the total gravity of the steel arch structure is measured to be G, the lifting force of the first lifting rope and the lifting force of the second lifting rope are both calculated to be F ═ G/2, and the tension force of the horizontal tension rope is adjusted to be T ═ F/tan α.
Further, in step six, the tensioning force T of the horizontal tensioning rope, the lifting force F of the first hoisting rope and the lifting force F of the second hoisting rope are loaded in a stepwise manner according to an equal proportional relationship.
Further, in step six, the tension T of the horizontal tensioning rope, the lifting force F of the first hoisting rope and the lifting force F of the second hoisting rope are increased in steps of 10% increments.
Further, in the sixth step, the lifting device of the first lifting tower and the lifting device of the second lifting tower are synchronously started, so that the steel arch structure performs lifting movement in a horizontal posture.
Has the beneficial effects that: according to the method for measuring the component and resultant forces, the steel arch structure is subjected to the lifting force F of the first lifting rope, the lifting force F of the second lifting rope and the tension force T of the horizontal tension rope during lifting. The stress conditions of the first connecting point and the second connecting point are symmetrical, namely the lifting force F of the first lifting rope and the tension force T of the horizontal tensioning rope are applied to the first connecting point; the second connection point is subjected to the lifting force F of the second hoisting rope and the tensioning force T of the horizontal tensioning rope.
And when the included angle between the application direction of the resultant force W and the horizontal line is equal to alpha, the resultant force W applies force along the direction of the tangent line L at the second connecting point, so that the steel arch structure can be smoothly lifted, the deformation bending moment of the steel arch structure is completely offset by the tension force T of the horizontal tension rope, and the deformation trend of the steel arch structure caused by the self gravity can be accurately restrained. Compared with the existing lifting construction method, the problem that the steel arch structure is easy to deform after trial lifting is solved, and the whole construction process is simpler.
Drawings
Fig. 1 is a schematic structural view of a steel arch structure before lifting in embodiment 1 of the lifting construction method of a steel arch structure according to the present invention;
fig. 2 is a schematic structural view of a steel arch structure lifted to form a butt joint in embodiment 1 of the method for lifting a steel arch structure of the present invention;
fig. 3 is a force analysis diagram of the steel arch structure at the second connection point in the embodiment 1 of the lifting construction method of the steel arch structure of the present invention.
In the figure: 1-steel arch structure, 10-horizontal tension rope, 11-first connection point, 12-second connection point, 2-first lifting tower, 20-lifting device of first lifting tower, 21-first lifting rope, 3-second lifting tower, 30-lifting device of second lifting tower, 31-second lifting rope, 4-bridge deck, 5-arch springing subsection, A-transverse span of steel arch structure, G-total gravity of steel arch structure, F-lifting force of first lifting rope/lifting force of second lifting rope, T-tension force of horizontal tension rope, tangent line of L-second connection point, W-resultant force.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In embodiment 1 of the lifting construction method of a steel arch structure of the present invention, as shown in fig. 1 to 3, the lifting construction method of a steel arch structure is used for lifting construction of a steel arch structure of a long-span railway bridge, and includes the following steps:
step one, determining a construction position of the steel arch structure 1, presetting a first lifting tower 2 and a second lifting tower 3 at the construction position, and installing an arch springing segment 5 in place. In this embodiment, according to the design drawing of the railway bridge, the first hoisting tower 2 and the second hoisting tower 3 are set up at the construction position of the bridge deck 4 in advance, specifically, according to the transverse span a of the steel arch structure 1, the preset positions of the first hoisting tower 2 and the second hoisting tower 3 are determined, that is, the first hoisting tower 2 and the second hoisting tower 3 are respectively located at two ends of the transverse span a of the steel arch structure 1.
Transporting the processed steel arch structure 1 and the two arch springing sections 5 to a construction position, placing the steel arch structure 1 between the first lifting tower 2 and the second lifting tower 3, respectively arranging the two arch springing sections 5 at the outer sides of the first lifting tower 2 and the second lifting tower 3, and installing the two arch springing sections 5 in place according to design requirements.
And step two, selecting a first connecting point 11 and a second connecting point 12 which are positioned on a horizontal line on the steel arch structure 1, and connecting a horizontal tensioning rope 10 between the first connecting point 11 and the second connecting point 12. Specifically, in step two, select the one end of steel arch structure 1 to be first tie point 11, select the other end of steel arch structure 1 to be second tie point 12, when steel arch structure 1 was in the state of erectting, first tie point 11 and second tie point 12 of steel arch structure 1 were located same water flat line, ensured that horizontal stretch-draw rope 10 can play effectual taut restraint to steel arch structure 1, had avoided the structural deformation that the promotion in-process arouses because of the dead weight.
Step three, connecting a first lifting rope 21 between a first connecting point 11 of the steel arch structure 1 and a first lifting tower 2, and connecting a second lifting rope 3 between a second connecting point 12 of the steel arch structure 1 and a second lifting tower 3; it should be noted that the first hoisting tower 2 and the second hoisting tower 3 are respectively provided with a hoisting device, the first connection point 11 of the steel arch structure 1 is connected to the hoisting device 20 of the first hoisting tower by a first hoisting rope 21, and the second connection point 12 of the steel arch structure 1 is connected to the hoisting device 30 of the second hoisting tower by a second hoisting rope 31. And, since the first hoisting tower 2 and the second hoisting tower 3 are located at both ends of the transverse span a of the steel arch structure 1, respectively, the first hoisting rope 21 and the second hoisting rope 31 both exert a hoisting action vertically upwards.
Selecting a tangent line L of the steel arch structure 1 at a second connecting point, and measuring an included angle alpha between the tangent line L at the second connecting point and a horizontal line; as shown in fig. 3, a tangent line tangent to the steel arch structure 1 is made at a second connection point 12 of the steel arch structure 1, and an included angle α between a tangent line L at the second connection point and a horizontal line is measured, so that various construction parameters can be determined subsequently, and the deformation problem of the steel arch structure 1 in the lifting process can be prevented.
Step five, determining that the lifting force of the first lifting rope and the lifting force of the second lifting rope are both F, adjusting the tension force of the horizontal tension rope to be T, enabling the combined force of the lifting force of the first lifting rope/the lifting force F of the second lifting rope and the tension force T of the horizontal tension rope to be W, and enabling the included angle between the direction of the combined force W and the horizontal line to be equal to alpha; according to the method for measuring the force of the component and the resultant force, the steel arch structure 1 is subjected to a lifting force F of the first lifting rope, a lifting force F of the second lifting rope and a tension force T of the horizontal tension rope during lifting.
Moreover, the stress conditions of the first connection point 11 and the second connection point 12 are symmetrical, that is, the lifting force F of the first lifting rope and the tension force T of the horizontal tension rope are applied to the first connection point 11; the lifting force F of the second hoisting rope and the tensioning force T of the horizontal tensioning rope are applied to the second connection point 12, and the stress condition at the second connection point 12 is selected for analysis, where the resultant force W of the two forces is applied. For convenience of understanding, the resultant force W is extended reversely, as shown in fig. 3, when an included angle between the applying direction of the resultant force W and the horizontal line is equal to α, the resultant force W applies a force in the direction of the tangent line L at the second connecting point, at this time, the steel arch structure 1 can be smoothly lifted, the deformation bending moment of the steel arch structure 1 is completely offset by the tensile force T of the horizontal tension rope, and the deformation tendency of the steel arch structure 1 caused by the self gravity can be accurately restrained. Compared with the existing lifting construction method, the problem that the steel arch structure is easy to deform after trial lifting is solved, and the whole construction process is simpler.
In step five, the total gravity of the steel arch structure 1 is measured as G, the lifting force of the first hoisting rope and the lifting force of the second hoisting rope are both calculated to be F ═ G/2, and the tension of the horizontal tension rope is adjusted to be T ═ F/tan α. From the above analysis, it can be seen that the lifting force F of the first hoisting rope and the lifting force F of the second hoisting rope are used to lift the steel arch structure 1, and the resultant force of the two is balanced against the total weight G of the steel arch structure; when the tension T of the horizontal tensioning line is F/tan α, the resultant W of the lifting force F of the second hoisting rope and the tension T of the horizontal tensioning line at the second connection point 12 extends in the direction of the tangent L at the second connection point, ensuring that the steel arch structure 1 remains unchanged in structural shape.
And step six, synchronously loading according to the tension force of the horizontal tensioning rope T and the lifting force of the first lifting rope and the lifting force of the second lifting rope F until the steel arch structure 1 is lifted to form butt joint with the arch springing segment 5. In step six, the tension T of the horizontal tensioning rope, the lifting force F of the first hoisting rope and the lifting force F of the second hoisting rope are loaded step by step according to an equal proportional relationship. Specifically, the tension force T of the horizontal tension rope, the lifting force F of the first lifting rope and the lifting force F of the second lifting rope are increased step by step in 10% increments, namely the tension force of the horizontal tension rope is increased step by step according to 0.1T, 0.2T, 0.3T, 0.4T … … 0.9.9T and 1T, and in synchronization with the increase, the lifting force F of the first lifting rope and the lifting force F of the second lifting rope are increased step by step according to 0.1F, 0.2F, 0.3F, 0.4F … … 0.9.9F and 1F, so that the steel arch structure 1 is ensured to be stressed uniformly all the time before leaving the ground, and any deformation damage is avoided.
In addition, in step six, the lifting device 20 of the first lifting tower and the lifting device 30 of the second lifting tower are synchronously started, so that the steel arch structure 1 performs lifting movement in a horizontal posture.
In other specific embodiments of the lifting construction method of the steel arch structure, in order to meet different use requirements, the positions of the first connection point and the second connection point may not only be limited to the end points of the steel arch structure in specific embodiment 1, but also the positions on the steel arch structure near the two ends may be selected as the first connection point and the second connection point, so as to ensure that the first connection point and the second connection point are on the same horizontal line; correspondingly, the first lifting tower and the second lifting tower can select positions corresponding to the first connecting point and the second connecting point, and can also select positions near the first connecting point and the second connecting point, so that the direction of the resultant force W of the lifting force and the tensile force is the same as the tangential direction of the connecting points.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (5)
1. A lifting construction method of a steel arch structure is characterized by comprising the following steps:
step one, determining a construction position of a steel arch structure, presetting a first lifting tower and a second lifting tower at the construction position, and installing arch feet in place in sections;
selecting a first connection point and a second connection point which are positioned on a horizontal line on the steel arch structure, and connecting a horizontal tensioning rope between the first connection point and the second connection point;
step three, connecting a first lifting rope between the first connecting point and the first lifting tower, and connecting a second lifting rope between the second connecting point and the second lifting tower;
selecting a tangent line L of the steel arch structure at the second connecting point, and measuring an included angle alpha between the tangent line L at the second connecting point and a horizontal line;
step five, determining that the lifting force of the first lifting rope and the lifting force of the second lifting rope are both F, adjusting the tension force of the horizontal tensioning rope to be T, enabling the resultant force of the lifting force F and the tension force T to be W, and enabling the included angle between the direction of the resultant force W and the horizontal line to be equal to alpha;
step six, synchronously loading the lifting force of the first lifting rope and the lifting force of the second lifting rope which are both F according to the tension force of the horizontal tensioning rope as T until the steel arch structure is lifted to form butt joint with the arch springing sections;
in step five, measuring the total gravity of the steel arch structure as G, calculating that the lifting force of the first lifting rope and the lifting force of the second lifting rope are both F ═ G/2, and adjusting the tension force of the horizontal tension rope as T ═ F/tan α;
in step six, the tension T of the horizontal tensioning rope, the lifting force F of the first hoisting rope and the lifting force F of the second hoisting rope are loaded step by step according to an equal proportional relationship.
2. The method for lifting and constructing a steel arch structure according to claim 1, wherein in the first step, the predetermined positions of the first lifting tower and the second lifting tower are determined according to the transverse span of the steel arch structure.
3. A method of lifting a steel arch structure according to claim 2, wherein in step two, one end of the steel arch structure is selected as a first connection point and the other end of the steel arch structure is selected as a second connection point.
4. The method of claim 1, wherein in step six, the tension force T of the horizontal tension rope, the lifting force F of the first lifting rope, and the lifting force F of the second lifting rope are increased in steps of 10% increments.
5. The method as claimed in claim 1, wherein in step six, the lifting means of the first lifting tower and the lifting means of the second lifting tower are synchronously activated to perform a lifting motion of the steel arch structure in a horizontal posture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011151643.8A CN112281685B (en) | 2020-10-23 | 2020-10-23 | Lifting construction method of steel arch structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011151643.8A CN112281685B (en) | 2020-10-23 | 2020-10-23 | Lifting construction method of steel arch structure |
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| CN112281685A CN112281685A (en) | 2021-01-29 |
| CN112281685B true CN112281685B (en) | 2022-05-10 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190918528A (en) * | 1909-08-11 | 1910-07-28 | Philip Aylett | Improvements in and relating to the Construction of Concrete Arches and the like. |
| CN1904210A (en) * | 2006-07-28 | 2007-01-31 | 中铁工程设计咨询集团有限公司 | Installing and closure method of steel arched bridge arch rib large segment and lifting system |
| CN102777043B (en) * | 2012-08-03 | 2015-03-04 | 浙江精工钢结构集团有限公司 | Construction method for lifting arch structure in zero-deformation state |
| CN103643637B (en) * | 2013-12-03 | 2015-08-05 | 中铁八局集团市政工程有限公司 | Original position construction method for lifting whole after the first vertical transfer of Long-Span Concrete Filled Steel Tubular Arch Bridges |
| CN106012864B (en) * | 2016-07-27 | 2017-10-13 | 中铁上海工程局集团有限公司 | A kind of method of the overall erection ＆ lift of bridge arch rib |
| CN207919363U (en) * | 2017-12-21 | 2018-09-28 | 中铁广州工程局集团有限公司 | A kind of Filled Steel Tubular Arch Bridge low level assembly lifting system |
| CN109914266B (en) * | 2019-04-17 | 2020-07-10 | 中交路桥建设有限公司 | Construction method for longitudinally moving and lifting installation of large steel pipe arch |
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