CN112709137B - Hoisting construction method for stiffening beam of suspension bridge - Google Patents
Hoisting construction method for stiffening beam of suspension bridge Download PDFInfo
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- CN112709137B CN112709137B CN202011480357.6A CN202011480357A CN112709137B CN 112709137 B CN112709137 B CN 112709137B CN 202011480357 A CN202011480357 A CN 202011480357A CN 112709137 B CN112709137 B CN 112709137B
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 239000000725 suspension Substances 0.000 title claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000004873 anchoring Methods 0.000 claims abstract description 5
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 239000002965 rope Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000006011 modification reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 1
- 230000001360 synchronised Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Classifications
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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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
Abstract
The invention discloses a hoisting construction method of a stiffening girder of a suspension bridge, which comprises the following steps: installing a cable saddle on the top of a main tower according to a preset requirement, deviating the cable saddle to one side of a side span, and erecting a side span main cable and a mid span main cable; installing a reaction frame of a hoisting system on the top of the main tower, and anchoring a bearing cable of the hoisting system on the reaction frame; installing hoisting equipment; the sling hoists the stiffening beam body to move to the appointed installation position for installation, and the offset of the cable saddle to one side of the side span is adjusted in real time according to the hoisting working condition or the non-hoisting working condition of the sling, so that the tension horizontal component of the side span main cable is balanced with the tension horizontal component of the mid-span main cable; and after the hoisting is finished, moving the cable saddle to a designed position, and dismantling the hoisting system and the hoisting equipment. The invention has the advantages of saving cost, time and labor.
Description
Technical Field
The invention relates to the field of civil engineering bridge construction, in particular to a hoisting construction method of a stiffening beam of a suspension bridge (construction of roads, railways or bridges; cantilever erection).
Background
The existing stiffening girder of a suspension bridge is hoisted by adopting a cable crane, after the conventional cable crane hoists the stiffening girder at a mid-span, a horizontal component generated by a bearing cable of the cable crane is transmitted to a ground anchor through a side-span bearing cable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hoisting construction method of a stiffening girder of a suspension bridge, which is cost-saving, time-saving and labor-saving.
In order to solve the technical problem, the invention adopts the following technical scheme:
a hoisting construction method of a stiffening beam of a suspension bridge comprises the following steps:
s1, installing a cable saddle on the top of the main tower according to preset requirements, deviating the cable saddle to one side of a side span, and erecting a side span main cable and a mid span main cable;
s2, installing a reaction frame of the hoisting system on the top of the main tower, anchoring a bearing cable of the hoisting system on the reaction frame, and adjusting the span sag of the bearing cable to meet the preset design requirement;
s3, installing a trolley, a lifting appliance, a winch, a lifting cable and a traction cable of the lifting equipment, wherein the trolley is hung on the bearing cable, the lifting cable and the traction cable, the lifting appliance is installed below the trolley and used for lifting a stiffening beam body, and the winch is used for drawing the lifting cable and the traction cable;
s4, starting a winch to pull a hoisting rope and a traction rope, driving a lifting appliance to lift a stiffening beam body to move to a specified mounting position for mounting, and adjusting the offset of a cable saddle to one side of a side span in real time according to the lifting working condition or the non-lifting working condition of the lifting appliance, so that the tension horizontal component of a main cable of the side span is balanced with the tension horizontal component of a main cable of a middle span;
and S5, after the stiffening beam body is hoisted, moving the cable saddle to a designed position, and dismantling the hoisting system and the hoisting equipment.
As a further improvement to the above technical solution:
in step S4, the real-time adjustment of the offset of the cable saddle to one side of the side span according to the hoisting condition or the non-hoisting condition of the spreader specifically includes the following steps:
a1, calculating the horizontal component of the tension of the main mid-span cable and the main side-span cable by using geometric nonlinear software and an analytical method, and calculating the horizontal component of the load-bearing cable generated under the hoisting working condition and the non-hoisting working condition;
a2, calculating the horizontal force needed by the main mid-span cable and the main side-span cable according to the calculation result of the step A1 and the horizontal force which can be resisted by the main tower presetting;
a3, determining the offset position of the cable saddle according to the calculation result of the step A2, and determining the offset of the cable saddle;
and A4, pushing the cable saddle to the offset position of the offset determined in the step A3.
In step S4, the pushing jack is used to adjust the offset of the cable saddle to the side span.
The hoisting system further comprises an embedded part, and the embedded part is embedded in the top of the main tower and used for installing the reaction frame.
Compared with the prior art, the invention has the advantages that:
the hoisting construction method directly anchors the bearing cable of the hoisting system at the top of the main tower when hoisting the stiffening beam body, adjusts the tension of the side-span main cable and the mid-span main cable by adjusting the offset of the cable saddle to one side of the side span during hoisting, and balances the horizontal force generated when the stiffening beam body is hoisted by the cable crane by the tension difference of the mid-span main cable and the side-span main cable, thereby saving the side-span bearing cable, the side-span anchoring system and the like required by the conventional cable crane construction, greatly saving the cost while fully utilizing the bearing capacity of the permanent structure, and saving time and labor.
Drawings
Fig. 1 is a schematic view of the erection of a main cable.
Figure 2 is a schematic view of the hoisting system installation.
Fig. 3 is a schematic illustration of stiffening beam hoisting.
Fig. 4 is a schematic view showing the completion of the hoisting of the stiffening beam.
Figure 5 is a schematic illustration of the hoist system removal.
FIG. 6 is a flow chart of the construction of the present invention.
The reference numerals in the figures denote:
1. a main cable is spanned; 2. a midspan main cable; 3. a main tower; 4. a cable saddle; 51. embedding parts; 52. a reaction frame; 53. a load bearing cable; 61. a sports car; 62. a spreader; 63. a winch; 64. hoisting cables and traction cables; 7. a stiffening beam body.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples. Unless otherwise specified, the instruments or materials employed in the present invention are commercially available.
Example 1:
as shown in fig. 6, the hoisting construction method for the stiffening beam of the suspension bridge of the embodiment specifically includes the following steps:
and S1, installing the cable saddle 4 on the top of the main tower 3 according to the preset requirement, deviating the cable saddle 4 to one side of the side span, and erecting the side span main cable 1 and the middle span main cable 2.
When the cable saddle 4 is installed, pre-deflection is carried out as required to complete the erection of the main cable, as shown in fig. 1. The reason for pre-deflecting the cable saddle 4 is that the horizontal tension when the stiffening beam body 7 is subsequently hoisted is borne by the side-span main cable 1, the tension of the side-span main cable 1 and the tension of the mid-span main cable 2 can be adjusted through pre-deflecting the cable saddle 4, and the horizontal components of the tension of the side-span main cable 1 and the mid-span main cable 2 can be basically kept balanced through continuously adjusting the pre-deflection amount of the cable saddle 4 in the subsequent hoisting process.
S2, installing the reaction frame 52 of the hoisting system on the top of the main tower 3, anchoring the bearing cable 53 of the hoisting system on the reaction frame 52, and adjusting the midspan sag of the bearing cable 53 to meet the preset design requirement, as shown in FIG. 2.
The hoisting system further comprises an embedded part 51, wherein the embedded part 51 is embedded in the top of the main tower 3 and is used for installing a reaction frame 52.
S3, a sports car 61 for installing hoisting equipment, a lifting appliance 62, a winch 63, a lifting cable and a traction cable 64, wherein the sports car 61 is hung on the bearing cable 53, the lifting cable and the traction cable 64, the lifting appliance 62 is installed below the sports car 61 and used for hoisting the stiffening beam body 7, and the winch 63 is used for pulling the lifting cable and the traction cable 64, as shown in figure 3.
And S4, starting the winch 63 to pull the hoisting rope and the traction rope 64, driving the lifting appliance 62 to lift the stiffening beam body 7 to move to a specified mounting position for mounting, and adjusting the offset of the cable saddle 4 to one side of the side span in real time according to the lifting working condition or the non-lifting working condition of the lifting appliance 62, so that the tension horizontal component of the side span main cable 1 is balanced with the tension horizontal component of the mid span main cable 2, as shown in figure 4.
The method for adjusting the offset of the cable saddle 4 to the side span side in real time according to the hoisting working condition or the non-hoisting working condition of the hoisting tool 62 specifically comprises the following steps:
a1, calculating the horizontal component of the tension of the main mid-span cable 2 and the main side-span cable 1 by using geometric nonlinear software and an analytical method, and calculating the horizontal component of the load-bearing cable 53 generated under the hoisting working condition and the non-hoisting working condition;
a2, calculating the horizontal force needed by the main mid-span cable 2 and the main side-span cable 1 according to the calculation result of the step A1 and the horizontal force which can be resisted by the main tower 3;
a3, determining the offset position of the cable saddle 4 according to the calculation result of the step A2, and determining the offset of the cable saddle 4;
and A4, pushing the cable saddle 4 to the offset position of the offset determined in the step A3.
The cable saddle 4 is pushed towards the midspan for many times in the erection process of the stiffening beam body 7, the offset of the cable saddle 4 towards one side of the side span is adjusted, so that the tension of the main cable 1 of the side span can balance the increase of the tension of the main cable 2 of the midspan caused by the installation of the stiffening beam body 7 of the midspan, and the requirement of generating horizontal component force when the stiffening beam body 7 is hoisted by a balance hoisting system is met (the adjustment is theoretically possible and more accurate when one stiffening beam body 7 is hoisted each time, but the operation is more troublesome in this way).
In the step S4, the offset of the cable saddle 4 to the side span side is adjusted by using the jack: the offset is calculated firstly, a jacking jack is installed, a jack cable saddle 4 is started to jack to a pre-advance position (offset position), and the upstream and downstream are synchronous during jacking.
The pre-deviation of the conventional cable saddle 4 only considers the horizontal component force change of permanent structure construction, does not consider the horizontal force generated during hoisting, and does not implement the adjustment of the deviation of the cable saddle 4 during subsequent hoisting. The invention considers the horizontal force generated during hoisting, fully exerts the characteristic of large bearing capacity of the side span main cable 1, and shares the horizontal force generated by hoisting the stiffening beam body 7 by the bearing cable 53 of the mid-span cable crane through the side span main cable 1. The offset of the cable saddle 4 is determined through accurate calculation, so that the tension of the side-span main cable 1 can balance the increase of the tension of the mid-span main cable caused by the mid-span installed stiffening beam body 7, the requirement of generating horizontal component force when a balance hoisting system hoists the stiffening beam body 7 is met, and the main tower is ensured not to bear excessive horizontal component force in the hoisting process of the stiffening beam body 7.
And S5, after the stiffening beam body 7 is hoisted, moving the cable saddle 4 to the designed position, as shown in figure 4, and dismantling the hoisting system and the hoisting equipment, as shown in figure 5.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention, unless the technical essence of the present invention departs from the content of the technical solution of the present invention.
Claims (4)
1. A hoisting construction method of a stiffening beam of a suspension bridge is characterized by comprising the following steps: the method comprises the following steps:
s1, installing a cable saddle (4) on the top of the main tower (3) according to preset requirements, enabling the cable saddle (4) to deviate to one side of a side span, and erecting a side span main cable (1) and a middle span main cable (2);
s2, installing a reaction frame (52) of a hoisting system on the top of the main tower (3), anchoring a bearing cable (53) of the hoisting system on the reaction frame (52), and adjusting the midspan sag of the bearing cable (53) to meet the preset design requirement;
s3, installing a trolley (61) of the hoisting equipment, a lifting appliance (62), a winch (63), a hoisting cable and a traction cable (64), wherein the trolley (61) is hung on the bearing cable (53), the hoisting cable and the traction cable (64), the lifting appliance (62) is installed below the trolley (61) and used for hoisting a stiffening beam body (7), and the winch (63) is used for drawing the hoisting cable and the traction cable (64);
s4, starting a winch (63) to pull a hoisting cable and a traction cable (64), driving a lifting appliance (62) to lift a stiffening beam body (7) to move to a specified mounting position for mounting, and adjusting the offset of a cable saddle (4) to one side of a side span in real time according to the lifting appliance (62) in a lifting working condition or a non-lifting working condition to balance the tension horizontal component of the side span main cable (1) and the tension horizontal component of the mid span main cable (2);
s5, after the stiffening beam body (7) is hoisted, moving the cable saddle (4) to a designed position, and dismantling the hoisting system and the hoisting equipment.
2. The hoisting construction method according to claim 1, characterized in that: in the step S4, the adjusting the offset of the cable saddle (4) to the side span in real time according to the hoisting working condition or the non-hoisting working condition of the hoisting tool (62) specifically includes the following steps:
a1, calculating the horizontal component of the tension of the main mid-span cable (2) and the main side-span cable (1) by using geometric non-linear software and an analytical method, and calculating the horizontal component of the load-bearing cable (53) generated under the hoisting working condition and the non-hoisting working condition;
a2, calculating the tension horizontal component force required by the midspan main cable (2) and the side-span main cable (1) according to the calculation result of the step A1 and the horizontal force which can be resisted by the main tower (3) in advance;
a3, determining the offset position of the cable saddle (4) according to the calculation result of the step A2, and determining the offset of the cable saddle (4);
a4, pushing the cable saddle (4) to the offset position of the offset determined in the step A3.
3. The hoisting construction method according to claim 2, characterized in that: in the step S4, the offset amount of the cable saddle (4) to the side span side is adjusted by using the jack.
4. The hoisting construction method according to claim 1, characterized in that: the hoisting system further comprises an embedded part (51), wherein the embedded part (51) is embedded in the top of the main tower (3) and is used for installing a reaction frame (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011480357.6A CN112709137B (en) | 2020-12-15 | 2020-12-15 | Hoisting construction method for stiffening beam of suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011480357.6A CN112709137B (en) | 2020-12-15 | 2020-12-15 | Hoisting construction method for stiffening beam of suspension bridge |
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| CN112709137A CN112709137A (en) | 2021-04-27 |
| CN112709137B true CN112709137B (en) | 2022-09-09 |
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| CN202011480357.6A Active CN112709137B (en) | 2020-12-15 | 2020-12-15 | Hoisting construction method for stiffening beam of suspension bridge |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4057724B2 (en) * | 1998-11-12 | 2008-03-05 | 大成建設株式会社 | Support structure of bridge girder in extrusion method |
| CN101914897B (en) * | 2010-07-30 | 2011-08-31 | 中铁四局集团有限公司 | Construction method of single main cable inclined-suspender earth anchored suspension bridge |
| KR101676009B1 (en) * | 2014-09-30 | 2016-11-14 | 현대건설 주식회사 | Construct method of the suspension bridge girder and construction equipment of the suspension bridge girder |
| CN104674668B (en) * | 2015-01-19 | 2016-06-29 | 中铁大桥局集团有限公司 | A kind of method by cable-hoisting construction girder section |
| CN108203932A (en) * | 2018-03-15 | 2018-06-26 | 西京学院 | A kind of galvanized wire for suspension bridge Lift-on/Lift-off System and its installation method |
| CN109371854B (en) * | 2018-10-17 | 2020-02-04 | 中交二航局第二工程有限公司 | Method for constructing large-span suspension bridge stiffening beam by cable crane |
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