CN111977522B - Ground reeving and lifting installation method for cable crane crown block - Google Patents
Ground reeving and lifting installation method for cable crane crown block Download PDFInfo
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- CN111977522B CN111977522B CN202010764236.8A CN202010764236A CN111977522B CN 111977522 B CN111977522 B CN 111977522B CN 202010764236 A CN202010764236 A CN 202010764236A CN 111977522 B CN111977522 B CN 111977522B
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- cable
- main
- crown block
- tower
- traction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C21/00—Cable cranes, i.e. comprising hoisting devices running on aerial cable-ways
- B66C21/08—Sag carriers or rope trolleys, suspended or not, e.g. fixed but offering clearance for travelling gear
- B66C21/10—Sag carriers or rope trolleys, suspended or not, e.g. fixed but offering clearance for travelling gear travelling
Abstract
The invention relates to a ground reeving and lifting installation method of a cable crane crown block, which is characterized in that a main cable is pulled by a traction cable one by one to pass through a main cable laying side tower, the crown block penetrates through the ground, and then the traction cable continuously pulls the main cable to turn over an opposite-bank cable tower and is anchored and anchored after opposite-bank; the main cable hoist is used for dragging two main cables symmetrically penetrating into the overhead travelling crane to lift the overhead travelling crane to the tower top for temporary anchoring, then all the rest main cables are led into the bearing wheel sliding grooves of the overhead travelling crane one by one, and finally all the main cables are anchored after the sag of the main cables is adjusted and the cable releasing side. The invention does not need to install a crown block suspension platform on the top of the cable tower, but passes the crown block through the main cable on the ground, and directly lifts the main cable to the designed sag position in the lifting process of the crown block, thereby having the advantages of high construction speed, low cost and high safety.
Description
Technical Field
The invention belongs to the field of bridge construction, and relates to a method for installing a cable crane crown block on a cable when a cable crane is used for large-span bridge construction, in particular to a method for installing the cable crane crown block by using ground reeving and lifting.
Background
The cable crane system comprises a cable crane main cable and a crown block traveling along the main cable, and the cable crane crown block is mainly used for hoisting the beam section in the cable crane construction process of the large-span bridge. Before the cable crane runs, the overhead travelling crane is mounted on the main cable. At present, a cable crane crown block generally adopts a tower top reeving installation method, a bracket is installed at the top of a cable crane tower to serve as a crown block supporting platform, then the crown block is lifted to the tower top platform by a tower crane, and then a main cable is reeved into the crown block. The above method has the following disadvantages:
1. the overhead travelling crane penetrates through the main cable at the top of the cable tower, so that the overhead travelling crane is high in danger, and the danger is high when the weight of the overhead travelling crane is high;
2. the erection position of the tower top bracket is considered during the design and construction of the cable tower, and the erection of the tower top bracket consumes more materials, so that the construction cost is increased;
3. need adopt the tower crane to carry out supplementary installation, this tower crane belongs to the equipment of cable tower construction stage in earlier stage for the overhead traveling crane installation can influence equipment turnover, influences the efficiency of construction.
Disclosure of Invention
The invention aims to solve the problems of installation of a main cable penetrating through the top of a cable tower of the existing cable crane crown block, and provides a construction method for ground penetrating, lifting and installing of the cable crane crown block, so that the construction risk is reduced, the debugging time is shortened, and the construction cost is saved.
The technical scheme of the invention is as follows:
a ground reeving and lifting installation method for a cable crane crown block is characterized by comprising the following steps:
(1) two traction cable winches are respectively arranged at the side span sides of the cable towers at two banks, and the two ends of the traction cable are respectively connected with the two traction cable winches after bypassing the steering wheels arranged at the tops of the two towers;
(2) hoisting two groups of overhead traveling cranes to the bottom of the midspan side of a cable tower on a cable bank by using a truck crane, connecting the two groups of overhead traveling cranes in series to form a single overhead traveling crane, and temporarily connecting the overhead traveling cranes and the cable tower by using a steel wire rope;
(3) placing a main cable releasing disc at the side of a side span of a cable tower connected with a crown block, connecting one end of a main cable with a traction cable after passing around a rear anchor steering wheel, starting a traction cable winch, pulling the main cable through the traction cable to pass through a tower top steering wheel for a sufficient length, stopping pulling, temporarily anchoring the main cable at the tower top, starting the traction cable winch to release the traction cable, enabling the traction cable and the main cable to droop to the bottom of the cable tower, releasing the connection between the main cable and the traction cable, manually enabling the head of the main cable to pass through the crown block, and then connecting the head of the main cable with the traction cable again;
(4) the temporary anchoring of the main cable and the tower top is released, a traction cable winch is started to pull the main cable to pass through a steering wheel at the top of the opposite-bank cable tower, and then the main cable and the opposite-bank rear anchor are permanently anchored by using a cable clamp;
(5) all main cables penetrate through the crown block and are permanently anchored with the anchor after the crown block is opposite to the bank by adopting the same method in the steps (3) and (4);
(6) two groups of cable adjusting pulleys are symmetrically arranged on the rear anchor at the cable releasing side, two main cable winches are arranged at the position close to the rear anchor, and two main cables symmetrically penetrating into the crown block are connected with the two main cable winches after respectively bypassing the two groups of cable adjusting pulleys;
(7) starting a traction cable winch to lower down a traction cable, connecting the traction cable with a crown block, and then releasing the temporary connection between the crown block and a cable tower;
(8) simultaneously starting the two main cable winches to tighten the two main cables, lifting the crown block to leave the ground, and controlling the traction cable winches to enable a traction cable connected with the crown block to be in a tensioned state all the time in the lifting process of the crown block so as to prevent the crown block from sliding downwards along the main cables;
(9) after the overhead traveling crane is lifted to a preset height, stopping the main cable winch, starting the traction cable winch, utilizing the traction cable to pull the overhead traveling crane to the top of the cable tower, and temporarily anchoring the overhead traveling crane and the top of the cable tower; starting the main cable winch again, adjusting the verticality of the two main cables to meet the design requirement, and then temporarily anchoring the main cables and the rear anchor;
(10) sequentially tightening the rest main cables by adopting a main cable winch, and guiding each main cable into a bearing wheel chute of the overhead travelling crane through manual guidance; and finally, after the sag of all the main cables is adjusted to meet the design requirement, permanently anchoring the main cables and the rear anchors at the cable releasing sides to finish the installation of the overhead travelling crane on the main cables.
Compared with the prior art of installing the crown block on the tower top, the invention has the following advantages:
(1) the construction cost is low. The erection time and cost of the crown block bracket at the top of the cable tower are saved, the corresponding auxiliary cost of the tower crane is saved, and the tower crane can be dismantled after the construction of the cable tower is finished.
(2) The construction period is short. The overhead traveling crane suspension platform does not need to be installed on the top of the cable tower, the main cable is directly penetrated on the ground, the main cable is directly lifted to the designed sag position in the overhead traveling crane lifting process, the construction speed is high, and the overhead traveling crane installation and debugging time is shortened.
(3) The construction safety is high: the risk of high-altitude cable penetrating operation is avoided, and the construction safety is improved.
Drawings
FIG. 1 is a main flow chart of the construction of the present invention;
FIG. 2 is a schematic view of a cable being pulled through the top of the tower by a pulling cable and threaded through the crown block;
FIG. 3 is a schematic view of the cable being turned over the opposite shore pylon and anchored with the rear anchors;
fig. 4 is a diagram illustrating a state before preparation for lifting of the overhead traveling crane;
fig. 5 is a schematic diagram of a state after the crown block is lifted.
Detailed Description
FIG. 1 is a construction flow chart of the present invention, the overall method is as follows:
1. the main cables are pulled through the main cable laying side cable towers one by a pulling cable, and a crown block is penetrated on the ground;
2. the traction cable continuously pulls the main cable to turn over the opposite-shore cable tower and is anchored with the opposite-shore cable tower;
3. the main cable hoist is used for dragging two main cables symmetrically penetrating into the overhead travelling crane to lift the overhead travelling crane to the tower top for temporary anchoring, and then all the rest main cables are led into a bearing wheel sliding chute of the overhead travelling crane one by one;
4. and after the sag of all the main cables is adjusted, anchoring the main cables and the cable releasing side.
The specific implementation method of the invention is as follows:
(1) as shown in fig. 2, two traction cable winches 1 are respectively arranged at the side span sides of the cable towers 2 on both sides, and both ends of a traction cable 3 are respectively connected with the two traction cable winches 1 after bypassing the steering wheels 4 arranged at the tops of the two towers;
(2) hoisting two groups of overhead traveling cranes to the bottom of the midspan side of a cable tower on a cable bank by using a truck crane, connecting the two groups of overhead traveling cranes in series to form a single overhead traveling crane 5, and temporarily connecting the overhead traveling crane 5 with the cable tower 2 by using a steel wire rope 6;
(3) placing a main cable unreeling disc at the side of a side span of a cable unreeling shore cable tower 2, connecting one end of a main cable 7 with a traction cable 3 after passing around a steering wheel 9 on a rear anchor 8, starting a traction cable winch 1, pulling the main cable 7 through the traction cable 3 to a steering wheel at the top of the tower for a sufficient length, stopping the traction, temporarily anchoring the main cable at the top of the tower, starting the traction cable winch to loosen the traction cable, enabling the traction cable 3 and the main cable 7 to droop to the bottom of the cable tower, releasing the connection between the main cable and the traction cable, manually enabling the head of the main cable 7 to pass through a crown block 5, and then connecting the head of the main cable 3 again;
(4) as shown in fig. 3, the temporary anchoring of the main cable 7 and the tower top is released, the traction cable winch 1 is started to pull the main cable 7 through the steering wheel at the top of the opposite-shore cable tower, and then the main cable 7 and the opposite-shore rear anchor are permanently anchored by using a cable clamp and temporarily anchored with the cable-releasing side rear anchor;
(5) all main cables 7 are permanently anchored with the opposite-shore rear anchors 8 after all the main cables penetrate through the crown block 5 by adopting the same method in the steps (3) and (4);
(6) as shown in fig. 4, two groups of cable adjusting pulleys 10 are symmetrically arranged on the rear anchor 8 at the cable releasing side, two main cable winches 11 are arranged at the position close to the rear anchor, and two main cables 7 which symmetrically penetrate into the overhead travelling crane from left to right are respectively connected with the two main cable winches 11 after bypassing the two groups of cable adjusting pulleys 10;
(7) starting a traction cable winch 1 to lower a traction cable 3, and connecting the traction cable 3 with a crown block 5 to be used as a temporary sliding traction device in the lifting process of the crown block; then the temporary connection between the overhead travelling crane 5 and the cable tower 2 is released;
(8) simultaneously starting two main cable winches 11 to tighten two main cables 7, lifting the crown block 5 to leave the ground, and controlling the traction cable winch 1 to enable a traction cable 3 connected with the crown block to be in a tensioned state all the time in the lifting process of the crown block so as to prevent the crown block from sliding along the main cables;
(9) as shown in fig. 5, after the overhead traveling crane 5 is lifted to a predetermined height, the main rope hoist 11 is stopped, the traction rope hoist 1 is started, the overhead traveling crane 5 is pulled to the top of the cable tower 2 by the traction rope 3, and the overhead traveling crane and the top of the cable tower are temporarily anchored; the main cable winch is started again, and after the verticality of the two main cables 7 is adjusted to meet the design requirements, the two main cables are temporarily anchored with the rear anchor;
(10) installing cable adjusting pulleys 10 corresponding to the rest main cables on the rear anchor at the cable releasing side, arranging corresponding main cable winches 11 corresponding to the main cables, sequentially tightening the rest main cables 7 by adopting the main cable winches 11, and guiding each main cable 7 into a bearing wheel chute of the crown block 5 through manual guidance in the tightening process; finally, after all the main cable sag degrees are adjusted to meet the design requirements, the main cable 7 and the cable releasing side rear anchor 8 are permanently anchored, and the installation of the overhead travelling crane 5 on the main cable 7 is completed.
And in the later stage, if the main cable sag is deviated, fine adjustment can be performed through the cable adjusting pulley block.
Claims (1)
1. A ground reeving and lifting installation method for a cable crane crown block is characterized by comprising the following steps:
(1) two traction cable winches are respectively arranged at the side span sides of the cable towers at two banks, and the two ends of the traction cable are respectively connected with the two traction cable winches after bypassing the steering wheels arranged at the tops of the two towers;
(2) hoisting two groups of overhead traveling cranes to the bottom of the midspan side of a cable tower on a cable bank by using a truck crane, connecting the two groups of overhead traveling cranes in series to form a single overhead traveling crane, and temporarily connecting the overhead traveling cranes and the cable tower by using a steel wire rope;
(3) placing a main cable releasing disc at the side of a side span of a cable tower connected with a crown block, connecting one end of a main cable with a traction cable after passing around a rear anchor steering wheel, starting a traction cable winch, pulling the main cable through the traction cable to pass through a tower top steering wheel for a sufficient length, stopping pulling, temporarily anchoring the main cable at the tower top, starting the traction cable winch to release the traction cable, enabling the traction cable and the main cable to droop to the bottom of the cable tower, releasing the connection between the main cable and the traction cable, manually enabling the head of the main cable to pass through the crown block, and then connecting the head of the main cable with the traction cable again;
(4) the temporary anchoring of the main cable and the tower top is released, a traction cable winch is started to pull the main cable to pass through a steering wheel at the top of the opposite-bank cable tower, and then the main cable and the opposite-bank rear anchor are permanently anchored by using a cable clamp;
(5) all main cables penetrate through the crown block and are permanently anchored with the anchor after the crown block is opposite to the bank by adopting the same method in the steps (3) and (4);
(6) two groups of cable adjusting pulleys are symmetrically arranged on the rear anchor at the cable releasing side, two main cable winches are arranged at the position close to the rear anchor, and two main cables symmetrically penetrating into the crown block are connected with the two main cable winches after respectively bypassing the two groups of cable adjusting pulleys;
(7) starting a traction cable winch to lower down a traction cable, connecting the traction cable with a crown block, and then releasing the temporary connection between the crown block and a cable tower;
(8) simultaneously starting the two main cable winches to tighten the two main cables, lifting the crown block to leave the ground, and controlling the traction cable winches to enable a traction cable connected with the crown block to be in a tensioned state all the time in the lifting process of the crown block so as to prevent the crown block from sliding downwards along the main cables;
(9) after the overhead traveling crane is lifted to a preset height, stopping the main cable winch, starting the traction cable winch, utilizing the traction cable to pull the overhead traveling crane to the top of the cable tower, and temporarily anchoring the overhead traveling crane and the top of the cable tower; starting the main cable winch again, adjusting the verticality of the two main cables to meet the design requirement, and then temporarily anchoring the main cables and the rear anchor;
(10) sequentially tightening the rest main cables by adopting a main cable winch, and guiding each main cable into a bearing wheel chute of the overhead travelling crane through manual guidance; and finally, after the sag of all the main cables is adjusted to meet the design requirement, permanently anchoring the main cables and the rear anchors at the cable releasing sides to finish the installation of the overhead travelling crane on the main cables.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764236.8A CN111977522B (en) | 2020-08-02 | 2020-08-02 | Ground reeving and lifting installation method for cable crane crown block |
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| CN202010764236.8A CN111977522B (en) | 2020-08-02 | 2020-08-02 | Ground reeving and lifting installation method for cable crane crown block |
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| CN111977522A CN111977522A (en) | 2020-11-24 |
| CN111977522B true CN111977522B (en) | 2022-04-26 |
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| CN202010764236.8A Active CN111977522B (en) | 2020-08-02 | 2020-08-02 | Ground reeving and lifting installation method for cable crane crown block |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1072184A (en) * | 1996-08-30 | 1998-03-17 | Hitachi Ltd | Cable crane |
| US7410068B1 (en) * | 2007-07-06 | 2008-08-12 | Agudio S.P.A. | Blondin cableway installation |
| CN102020206A (en) * | 2010-12-17 | 2011-04-20 | 长江水利委员会长江勘测规划设计研究院 | Ropeway transport system of long-span steep terrain wind power device |
| CN104674668A (en) * | 2015-01-19 | 2015-06-03 | 中铁大桥局集团有限公司 | Method for hoisting construction girder sections through cables |
| CN107176548A (en) * | 2017-06-29 | 2017-09-19 | 湖南省中南桥梁安装工程有限公司 | A kind of cable crane overhead traveling crane closed circulation trailer system and traction method |
| CN108147295A (en) * | 2018-02-06 | 2018-06-12 | 中国路桥工程有限责任公司 | A kind of cable crane and its lifting trailer system in suspension bridge construction |
| CN109853394A (en) * | 2019-03-25 | 2019-06-07 | 安徽省路港工程有限责任公司 | Arch bridge cable hoisting tower button integrated construction engineering method |
-
2020
- 2020-08-02 CN CN202010764236.8A patent/CN111977522B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1072184A (en) * | 1996-08-30 | 1998-03-17 | Hitachi Ltd | Cable crane |
| US7410068B1 (en) * | 2007-07-06 | 2008-08-12 | Agudio S.P.A. | Blondin cableway installation |
| CN102020206A (en) * | 2010-12-17 | 2011-04-20 | 长江水利委员会长江勘测规划设计研究院 | Ropeway transport system of long-span steep terrain wind power device |
| CN104674668A (en) * | 2015-01-19 | 2015-06-03 | 中铁大桥局集团有限公司 | Method for hoisting construction girder sections through cables |
| CN107176548A (en) * | 2017-06-29 | 2017-09-19 | 湖南省中南桥梁安装工程有限公司 | A kind of cable crane overhead traveling crane closed circulation trailer system and traction method |
| CN108147295A (en) * | 2018-02-06 | 2018-06-12 | 中国路桥工程有限责任公司 | A kind of cable crane and its lifting trailer system in suspension bridge construction |
| CN109853394A (en) * | 2019-03-25 | 2019-06-07 | 安徽省路港工程有限责任公司 | Arch bridge cable hoisting tower button integrated construction engineering method |
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| CN111977522A (en) | 2020-11-24 |
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