CN113106866A - Counterweight type mounting method of main beam - Google Patents
Counterweight type mounting method of main beam Download PDFInfo
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- CN113106866A CN113106866A CN202110269591.2A CN202110269591A CN113106866A CN 113106866 A CN113106866 A CN 113106866A CN 202110269591 A CN202110269591 A CN 202110269591A CN 113106866 A CN113106866 A CN 113106866A
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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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Abstract
The invention relates to a counterweight type installation method of a main beam, wherein a midspan side crane and a side-span side crane are respectively installed on an assembled beam section at a cable tower; configuring a movable counterweight module at the side span side according to the longitudinal gradient of the main beam; the side span beam section is hoisted to a beam moving trolley which is pre-configured on the middle span side through the middle span side hoist, and is transferred to be hoisted by the side span side hoist through the beam moving trolley; the midspan beam section is lifted by the midspan side crane; the side span beam section and the mid-span beam section are synchronously spliced with the spliced beam sections; the position of the movable counterweight module changes along with the position of the side span beam section and the middle span beam section on the main beam. When the two sides of the cable tower are provided with the double cantilevers, when the load of the cantilever beam on one side of the cable tower is greatly stressed, the movable counterweight module can actively move towards the cantilever beam on the other side of the cable tower, so that the load applied to the cantilever beam on the other side by the movable counterweight module can be balanced with the load applied to the cantilever beam on one side.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a counterweight type mounting method of a main beam.
Background
At present, the traditional construction method of the steel box girder in the main tower area of the cable-stayed bridge is to set up a girder storage bracket beside a tower, hoist the steel box girder to the girder storage bracket in sections by using a crane ship or a crane, adjust the steel box girder in place by using a positioning system such as a jack and the like, install a first pair of stay cables after welding is finished, and then assemble a bridge deck crane to symmetrically hoist the next section of the steel box girder. For bridges constructed under special conditions such as crossing deep sea and deep river valley, a large temporary structure beam storage bracket may not be built in a proper space, or the cost for constructing the large temporary structure is too high and uneconomical. In addition, in order to improve the construction efficiency, the two side spans and the mid span of the tower column of the cable-stayed bridge are often constructed synchronously, and then a double-cantilever state is formed, however, when a 2# section steel box girder is assembled on a large section steel box girder of a main tower area by adopting a bridge crane, because the 2# section steel box girder is long and heavy, no girder storage bracket supports exist, the bridge crane bears the weight of all the steel box girders, the main steel box girder of the tower area is in an asymmetric stress state in which the two cantilevers are positioned, the stress safety of the steel box girder structure, the support and the temporary anchoring system is seriously influenced, and accidents such as inclination, deviation and the like of the steel box girder of the tower area can be caused. But the method of applying the balancing weight has low high-altitude operation efficiency and large danger coefficient.
Disclosure of Invention
In order to overcome the technical problems, particularly to solve the problems that no suitable space is provided for building a large temporary structural beam storage bracket, or the cost of building a large temporary structure is too high and uneconomical, the following technical scheme is specially provided:
the embodiment of the application provides a counterweight type installation method of a main beam, comprising the following steps:
respectively installing a mid-span side crane and a side-span side crane on the assembled beam section at the cable tower;
configuring a movable counterweight module at the side span side according to the longitudinal gradient of the main beam;
the side span beam section is hoisted to a beam moving trolley which is pre-configured on the middle span side through the middle span side hoist, and is transferred to be hoisted by the side span side hoist through the beam moving trolley;
the midspan beam section is lifted by the midspan side crane;
the side span beam section and the mid-span beam section are synchronously spliced with the spliced beam sections;
the position of the movable counterweight module changes along with the position of the side span beam section and the middle span beam section on the main beam.
Optionally, the hoisting the side-span beam segment to a beam-moving trolley pre-configured on the midspan side by the midspan side crane includes:
and when the mid-span side crane hoists the side-span beam section, the movable counterweight module synchronously moves to the side-span cantilever end on the side-span side.
Optionally, the side-span beam segment is hoisted to a beam-moving trolley pre-configured on the mid-span side by the mid-span side hoist, further comprising:
and when the mid-span side crane completely lifts the side-span beam section, the movable counterweight module moves to the side-span cantilever end.
Optionally, the side-span beam segment is hoisted to a beam-moving trolley pre-configured on the mid-span side by the mid-span side hoist, further comprising:
the mid-span side crane lifts the side span beam section to a bridge floor, and the side span beam section is horizontally rotated for 90 degrees;
and hoisting the side span beam section to the beam moving trolley.
Optionally, the transferring from the beam-moving trolley to the lifting by the side span side crane includes:
the movable counterweight module synchronously moves from the side span cantilever end to the mid-span side, and the speed of the movable counterweight module is the same as that of the beam moving trolley.
Optionally, after the moving counterweight module is synchronously moved from the sidespan cantilever end to the midspan side, the method includes:
and when the movable counterweight module reaches the mid-span cantilever end on the mid-span side, the beam moving trolley reaches the side-span cantilever end.
Optionally, before the mid-span beam section is lifted by the mid-span side crane, the method includes:
and transporting the mid-span beam section to a mid-span hoisting bridge position.
Optionally, the mid-span beam section is hoisted by the mid-span side hoist, comprising:
and when the mid-span side crane hoists the mid-span beam section, the movable counterweight module synchronously moves to the cable tower from the mid-span cantilever end.
Optionally, the mid-span beam section is lifted by the mid-span side crane, further comprising:
the mobile counterweight module arrives at the cable tower when the mid-span side hoist is fully hoisting the mid-span beam section.
Optionally, the splicing of the side span beam section and the mid span beam section with the spliced beam section synchronously comprises:
the mid-span side crane lifts the mid-span beam section to a mid-span side bridge deck installation position;
the side-span side crane simultaneously lifts and hangs the side-span beam section from the beam moving trolley, and horizontally rotates the side-span beam section by 90 degrees, so that the side-span beam section is positioned at the side-span bridge floor installation position;
and splicing the mid-span beam section and the mid-span side installed beam section, and simultaneously connecting the side-span beam section and the side-span side installed beam section.
Optionally, before installing the mid-span side crane and the side-span side crane on the assembled beam sections at the cable tower respectively, the method includes:
and symmetrically constructing a mid-span 0# block and a 1# block, and an edge-span 0# block and a 1# block on two sides of the cable tower column.
Compared with the prior art, the invention has the following beneficial effects:
the counterweight type installation method of the girder provided by the embodiment of the application comprises the steps that when two cantilevers are arranged on two sides of a cable tower, the movable counterweight module is configured on the installed cantilever beam section, and then when the load of the cantilever beam on one side of the cable tower is greatly stressed, the movable counterweight module can be moved to the cantilever beam on the other side of the cable tower actively, so that the load applied to the cantilever beam on the other side by the movable counterweight module can be balanced with the load applied to the cantilever beam on one side, the cantilever beam is prevented from overturning and deviating to one side, and the line type and the gradient of the installed bridge girder are ensured. Meanwhile, load balance adjustment can be rapidly and actively carried out according to the stress requirement, and the timeliness of load adjustment is guaranteed. Under the condition that the loads on the two sides of the double cantilever beams can be balanced quickly, the synchronous construction efficiency of the two sides of the double cantilever beams is ensured, and the construction efficiency of the whole bridge is further improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart of a counterweight mounting method for a main beam according to the present invention;
FIG. 2 is a schematic structural diagram of a side span beam section hoisted by a mid-span side crane and a movable counterweight module located at the side span cantilever section in the counterweight type installation method of the girder of the invention;
FIG. 3 is a schematic structural view of the side span beam section transported by the beam moving trolley and the movable counterweight module located at the side span cantilever section in the counterweight type installation method of the main beam.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, and/or operations, but do not preclude the presence or addition of one or more other features, integers, steps, operations, and/or groups thereof.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The counterweight type installation method of the main beam provided by the embodiment of the application is shown in fig. 1 and comprises the following steps: s110, S120, S130, S140, S150 and S160.
S110: and respectively installing a mid-span side crane and a side-span side crane on the assembled beam section at the cable tower.
Optionally, before installing the mid-span side crane and the side-span side crane on the assembled beam section of the cable tower respectively, the method includes:
and symmetrically building a mid-span 0# block and a 1# block, and an edge-span 0# block and a 1# block on two sides of the cable tower column.
In the embodiment provided by the application, the side span adopts a concrete beam, and the main bridge middle span and the secondary side span adopt a steel-concrete composite beam. In the construction process, as shown in fig. 2, firstly, a mid-span 0# block and a mid-span 1# block and an edge-span 0# block and a side-span 1# block are symmetrically built on two sides of a cable tower column 1, namely, when the mid-span 0# block is built, the edge-span 0# block is synchronously built; when the mid-span 1# block is built, the side-span 1# block is built synchronously, and further, the mid-span 0# block and the 1# block form a mid-span cantilever section 4 and the side-span 0# block and the 1# block form a side-span cantilever section 2 on two opposite sides of the tower column. The cable tower column 1 is fixedly connected with the side span cantilever beam section 2 and the middle span cantilever beam section 4 at the same time, and then the cable tower column 1 forms fulcrums of the side span cantilever section 2 and the middle span cantilever section 4. Further, in order to improve the construction efficiency, the construction of the side span and the mid-span beam section is synchronously carried out.
In the embodiment provided by the application, before the side span and the middle span beam section are built synchronously, the beam section to be installed needs to be transported to the installation position. Furthermore, because the side span side navigation space is small, a floating crane needs to be adopted for installation from the side of the midspan and is in place in a sliding mode. Therefore, referring to fig. 2 and 3, the mid-span side crane 6 is installed at the mid-span side, when the side-span beam section is transported to the bridge location by the transport ship, the bridge deck cantilever crane 6 of the mid-span hooks down and slowly lifts the side-span beam section in sections, and after the side-span beam section is lifted to the bridge deck, the side-span beam section is placed on the beam moving trolley 7, so that the beam moving trolley 7 transports the side-span beam section to the side-span end, and then the side-span side crane 5 of the side-span cantilever end can lift the side-span beam section from the beam moving trolley 7 for installation.
In the embodiment provided by the present application, the mid-span side hoist 6 and the edge-span side hoist 5 are set up simultaneously. The crane comprises a door-shaped support, a main truss and a lifting appliance, wherein the door-shaped support is arranged on the spliced beam sections in a crossing mode, the lifting appliance is arranged below the main truss, the lifting appliance is a rotary lifting appliance, and then the lifted beam sections can be horizontally rotated by 90 degrees, so that the beam sections can be moved on the spliced beam sections.
S120: configuring a movable counterweight module at the side span side according to the longitudinal gradient of the main beam;
s130: the side span beam section is hoisted to a beam moving trolley which is pre-configured on the midspan side through a midspan side hoist, and is transferred to be hoisted by the side span side hoist from the beam moving trolley;
optionally, the hoisting of the side span beam segment by the crane at the midspan side to the beam moving trolley pre-configured at the midspan side includes:
when the mid-span side crane lifts the side-span beam section, the movable counterweight module synchronously moves to the side-span cantilever end on the side-span side.
Optionally, the side span beam segment is hoisted to a beam moving trolley pre-configured on the mid-span side by a mid-span side hoist, further comprising:
when the mid-span side crane completely lifts up the side-span beam section, the movable counterweight module moves to the side-span cantilever end on the side-span side.
Optionally, the side span beam segment is hoisted to a beam moving trolley pre-configured on the mid-span side by a mid-span side hoist, further comprising:
lifting the side span beam section to the bridge floor by a mid-span side crane, and horizontally rotating the side span beam section for 90 degrees;
and hoisting the side span beam section to a beam moving trolley.
In the embodiment provided by the application, because the connected side span and mid span form a double-cantilever structure on two sides of the cable tower column, and the side span adopts a concrete beam, further in the construction process, the load of the mid-span cantilever section and the side-span cantilever section is easy to be unbalanced, and the load of one side where the side-span beam section is located is large. Therefore, in the construction process, referring to fig. 2 and 3, it is necessary to ensure the load balance of the cantilever beam sections on both sides of the cable tower, and avoid the built beam sections from overturning, and then install the movable counterweight module 3 on the built bridge girder, where the movable counterweight module 3 includes a movable counterweight platform and a counterweight module arranged on the movable counterweight platform.
In the embodiment that this application provided, the counter weight module is the concrete piece, can set up a plurality of concrete pieces on the removal counter weight platform to be used for the load that the compensating beam section applyed. The movable counterweight module is configured on the side-span side according to the longitudinal gradient of the main beam, so that the movable counterweight module can reach the end part of the side-span cantilever beam more quickly when the mid-span side crane lifts and hangs the side-span cantilever beam section, and further the movable counterweight module is used for balancing the load borne when the mid-span side crane lifts and hangs the side-span cantilever beam section. The movable counterweight module 3 can slide and move on the built bridge, and then when the load of the cantilever beam on one side is large, the movable counterweight module 3 can move to one side with small load so as to balance the load of the bridge built on two sides of the cable tower. Further, when the longitudinal gradient of the cantilever beam is greater than a preset threshold value, the movable counterweight module moves towards the side with the higher longitudinal gradient of the cantilever beam. Illustratively, at a longitudinal slope threshold of M, when the cantilever beam longitudinal slope L is greater than M, then the cantilever beam is moved to the higher side. Wherein the cantilever beam is the whole beam section spliced at the two sides of the cable tower. The cantilever beam longitudinal gradient is the longitudinal gradient of the whole spliced beam section on the cable tower.
Correspondingly, in the embodiment provided by the application, referring to fig. 2 and 3, when the mid-span cantilever crane 7 lifts the side-span beam section, the movable counterweight module 3 moves towards the side-span cantilever section, so that the load of the side-span cantilever section 2 is balanced with the load of the mid-span cantilever section 4, thereby avoiding overturning to one side and avoiding building a large-scale temporary support structure. When the mid-span side crane 6 completely lifts up the side-span beam section, the movable counterweight module 3 reaches the side-span cantilever end. In the process of hoisting the side-span beam section by the mid-span side crane 6, the movable counterweight module 3 synchronously moves towards the side-span cantilever end, namely when the cantilever crane 6 at the mid-span cantilever end bears the load, the movable counterweight module 3 synchronously moves towards the side-span cantilever end.
Furthermore, after the mid-span side crane is lifted to the bridge floor, in order to place the side-span beam sections on the beam moving trolley on the bridge, the side-span beam sections are horizontally rotated by 90 degrees, so that the side-span beam sections are placed on the beam moving trolley, and the side-span beam sections cannot damage the stay cables on the connected cable towers in the beam moving trolley conveying process.
Optionally, transferring from the beam-moving trolley to lifting by an edge-span side crane includes:
the movable counterweight module synchronously moves from the side span cantilever end to the mid-span side, and the speed of the movable counterweight module is the same as that of the beam moving trolley.
Optionally, after the moving counterweight module is synchronously moved from the side-span cantilever end to the mid-span side, the method includes:
when the movable counterweight module reaches the midspan cantilever end on the midspan side, the beam moving trolley reaches the side-span cantilever end.
In the embodiment provided by the application, after the side span beam section is placed on the beam moving trolley, the side span beam section is transported to the side span cantilever end through the beam moving trolley in order to facilitate the hoisting of the side span side crane. In the process, the load on the cantilever beams is a moving load, and the load on the cantilever beams on the two sides of the cable tower is balanced. Referring to fig. 3, the movable counterweight module 3 moves synchronously from the side-span cantilever end to the mid-span cantilever end, and the speed of the movable counterweight module 3 is equal to the speed of the beam moving trolley 7 and the directions are opposite, so that the movable counterweight module 3 and the beam moving trolley 7 can move oppositely. Illustratively, when the beam moving trolley 7 moves to the middle position of the mid-span cantilever section, the movable counterweight module 3 moves to the middle position of the side-span cantilever section 2 synchronously. When the beam moving trolley 7 moves to the position of the cable tower 1, the movable counterweight module 3 synchronously moves to the position of the cable tower 1 to meet the beam moving trolley 7, and the cantilever beam sections at the two sides are not under the load action; when the beam moving trolley 7 moves to the side span cantilever end, the movable counterweight module 3 synchronously moves to the middle span cantilever end, so that the load and moment of the side span cantilever section 2 and the middle span cantilever section 4 are balanced, and the overturning is avoided.
S140: the midspan beam section is lifted by a midspan side crane;
s150: synchronously splicing the side span beam section and the middle span beam section with the assembled beam section;
s160: the position of the movable counterweight module changes along with the position of the side span beam section and the middle span beam section on the main beam.
Optionally, before the mid-span beam section is lifted by the mid-span side crane, the method comprises:
and transporting the midspan beam section to a midspan hoisting bridge position.
Optionally, the mid-span beam section is hoisted by a mid-span side hoist, comprising:
when the midspan side crane lifts the midspan beam section, the movable counterweight module synchronously moves from the midspan cantilever end to the cable tower.
Optionally, the mid-span beam section is hoisted by a mid-span side hoist, further comprising:
when the mid-span side crane completely hoists the mid-span beam section, the counterweight module is moved to the cable tower.
Optionally, the side span beam section and the middle span beam section are spliced with the spliced beam section synchronously, including:
the mid-span side crane lifts the mid-span beam section to a mid-span side bridge deck installation position;
the side span side crane simultaneously lifts and hangs the side span beam section from the beam moving trolley, and horizontally rotates the side span beam section by 90 degrees, so that the side span beam section is positioned at the mounting position of the side span bridge floor;
and splicing the mid-span beam section and the mid-span side installed beam section, and simultaneously connecting the side-span beam section and the side-span side installed beam section.
After the side span beam sections are transported in place, the side span beam sections and the mid-span connecting section can be installed synchronously. In the embodiment provided by the application, after the transportation ship transports the mid-span beam section to the bridge location, the mid-span cantilever beam lifts up the mid-span beam section, and the movable counterweight module moves to the cable tower from the end of the mid-span cantilever beam simultaneously, and the mid-span beam section is completely lifted up by the mid-span cantilever beam, and the movable counterweight module moves to the cable tower (namely the root of the cable tower), so that the movable counterweight module can increase the consolidation force of the mid-span cantilever beam section at the fulcrum, and further, in the process of lifting the mid-span beam section by the mid-span side crane, the end load of the mid-span cantilever beam is prevented from being too large, the mid-span cantilever beam section falls off from the cable tower column and topples, and.
After the mid-span beam section is completely lifted by the mid-span side crane, the mid-span beam section is lifted to a bridge deck mounting position, meanwhile, the side-span side crane hoists the side-span beam section to the bridge deck mounting position at the end part of the side span from the beam moving trolley, and horizontally rotates the side-span beam section by 90 degrees, so that the connecting surface of the side-span beam section is opposite to the end surface of the side-span cantilever end, and the side-span beam section is conveniently connected with the side-span cantilever section. When the side span horizontal rotation body is rotated by 90 degrees and is positioned at the side span bridge floor installation position, the mid-span beam section and the side-span beam section are synchronously installed, so that the load balance of the cantilever beams on the two sides of the cable tower is ensured, and the construction efficiency is improved. In the counterweight type installation method of the main beam, when the loads of the cantilever beams on the two sides of the cable tower are unbalanced, the spliced beam sections have longitudinal gradients, and the counterweight module is moved to one side with a higher gradient according to the longitudinal gradients so as to balance loads on the two sides. The changes of the positions of the side span beam section and the mid span beam section on the main beam are changed, so that the longitudinal gradient of the cantilever beams on two sides of the cable tower is reduced, and the danger that the spliced beam section overturns in the construction process is reduced.
In conclusion, the counterweight type installation method of the main beam provided by the application comprises the following beneficial effects:
the counterweight type installation method of the girder provided by the embodiment of the application comprises the steps that when two cantilevers are arranged on two sides of a cable tower, the movable counterweight module is configured on the installed cantilever beam section, and then when the load of the cantilever beam on one side of the cable tower is greatly stressed, the movable counterweight module can be moved to the cantilever beam on the other side of the cable tower actively, so that the load applied to the cantilever beam on the other side by the movable counterweight module can be balanced with the load applied to the cantilever beam on one side, the cantilever beam is prevented from overturning and deviating to one side, and the line type and the gradient of the installed bridge girder are ensured. Meanwhile, load balance adjustment can be rapidly and actively carried out according to the stress requirement, and the timeliness of load adjustment is guaranteed. Under the condition that the loads on the two sides of the double cantilever beams can be balanced quickly, the synchronous construction efficiency of the two sides of the double cantilever beams is ensured, and the construction efficiency of the whole bridge is further improved.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A counterweight type mounting method of a main beam is characterized by comprising the following steps:
respectively installing a mid-span side crane and a side-span side crane on the assembled beam section at the cable tower;
configuring a movable counterweight module at the side span side according to the longitudinal gradient of the main beam;
the side span beam section is hoisted to a beam moving trolley which is pre-configured on the middle span side through the middle span side hoist, and is transferred to be hoisted by the side span side hoist through the beam moving trolley;
the midspan beam section is lifted by the midspan side crane;
the side span beam section and the mid-span beam section are synchronously spliced with the spliced beam sections;
the position of the movable counterweight module changes along with the position of the side span beam section and the middle span beam section on the main beam.
2. The method for installing main beams in a counterweight manner according to claim 1, wherein the side span beam section is hoisted to a beam moving trolley pre-configured on the midspan side by the midspan side hoist, and the method comprises the following steps:
and when the mid-span side crane hoists the side-span beam section, the movable counterweight module synchronously moves to the side-span cantilever end on the side-span side.
3. The method of installing girders in a counterweight manner according to claim 2, wherein the side span sections are hoisted by the mid-span side hoist to a girder moving trolley disposed at the mid-span side in advance, and further comprising:
and when the mid-span side crane completely lifts the side-span beam section, the movable counterweight module moves to the side-span cantilever end.
4. The method of installing girders in a counterweight manner according to claim 2, wherein the side span sections are hoisted by the mid-span side hoist to a girder moving trolley disposed at the mid-span side in advance, and further comprising:
the mid-span side crane lifts the side span beam section to a bridge floor, and the side span beam section is horizontally rotated for 90 degrees;
and hoisting the side span beam section to the beam moving trolley.
5. The method for installing the main beam in the counterweight manner according to claim 2, wherein the transferring from the beam transfer trolley to the lifting by the side span side crane comprises:
the movable counterweight module synchronously moves from the side span cantilever end to the mid-span side, and the speed of the movable counterweight module is the same as that of the beam moving trolley.
6. A method of counterweight installation of a main beam according to claim 5 wherein said moving counterweight module, after being moved synchronously from said side-span cantilevered end to said mid-span side, comprises:
and when the movable counterweight module reaches the mid-span cantilever end on the mid-span side, the beam moving trolley reaches the side-span cantilever end.
7. The method of counterweight installation of a main beam of claim 6 wherein said mid-span beam section prior to being hoisted by said mid-span side hoist comprises:
and transporting the mid-span beam section to a mid-span hoisting bridge position.
8. The method of counterweight installation of a main beam of claim 7 wherein said mid-span beam section is hoisted by said mid-span side hoist, comprising:
and when the mid-span side crane hoists the mid-span beam section, the movable counterweight module synchronously moves to the cable tower from the mid-span cantilever end.
9. The method of counterweight installation of a main beam of claim 8 wherein said mid-span beam section is hoisted by said mid-span side hoist, further comprising:
the mobile counterweight module arrives at the cable tower when the mid-span side hoist is fully hoisting the mid-span beam section.
10. A method of counterweight mounting a main beam as in claim 1 wherein said side span and mid span beam sections are spliced simultaneously with said spliced beam sections, comprising:
the mid-span side crane lifts the mid-span beam section to a mid-span side bridge deck installation position;
the side-span side crane simultaneously lifts and hangs the side-span beam section from the beam moving trolley, and horizontally rotates the side-span beam section by 90 degrees, so that the side-span beam section is positioned at the side-span bridge floor installation position;
and splicing the mid-span beam section and the mid-span side installed beam section, and simultaneously connecting the side-span beam section and the side-span side installed beam section.
11. The method of installing girders in a counterweight manner according to claim 1, wherein the step of installing mid-span side cranes and side-span side cranes at the assembled girder sections of the cable tower, respectively, comprises:
and symmetrically constructing a mid-span 0# block and a 1# block, and an edge-span 0# block and a 1# block on two sides of the cable tower column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110269591.2A CN113106866B (en) | 2021-03-12 | 2021-03-12 | Counterweight type mounting method of main beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110269591.2A CN113106866B (en) | 2021-03-12 | 2021-03-12 | Counterweight type mounting method of main beam |
Publications (2)
| Publication Number | Publication Date |
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| CN113106866A true CN113106866A (en) | 2021-07-13 |
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