A cable-stayed cable hanging installation method for special-shaped tower columns of a cable-stayed bridge
An installation method and technology of stay cables, which are used in bridge construction, bridges, erection/assembly of bridges, etc., can solve the problem that the horizontal hoisting distance of stay cables is too large, the stay cables cannot be satisfied, and the tower ends of stay cables cannot be completed. Lifting work, etc.
Active Publication Date: 2017-01-11
中铁大桥(郑州)缆索有限公司
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Problems solved by technology
[0002] During the cable-stayed construction of long-span cable-stayed bridges, the tower crane next to the tower cannot meet the hoisting requirements of the cable-stayed cables due to the heavy weight of the cable-stayed cables. When the site of the main tower of the cable-stayed bridge is located in a special area (such as near the airport, there is a height limit requirement for flight take-off and landing routes), conventional tower cranes and tower top hangers are not suitable due to their own height restrictions. At the same time, with the rapid development of bridge technology, especially cable-stayed bridge technology, the structural form of the main tower of cable-stayed bridges is becoming more and more novel, such as sail-shaped tower columns, resulting in cableways supporting cable-stayed cables The length of the pipe is getting longer and longer. Due to the large difference in the horizontal hoisting distance of the cable stays, under the same hoisting weight, it is necessary to use a large-sized tower side tower crane or a tower top hanger with a large hoisting distance. The above two points bring It is uneconomical and unsafe to complete the hoisting work of the cable-stayed tower end
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Such as figure 1 As shown, the equipment used in the method of the present invention includes a tower top bracket 7, a first traction hoist 1, a second traction hoist 12, a main traction wire rope 6, a first puller 5, a second puller 8, a first Traction wire rope 3, the first steering block 2, the first pulley group 4, the second traction wire rope 10, the second steering block 11 and the second block block 9.
[0022] Before the stay cable enters the hoisting operation stage, the tower top bracket 7 is installed on the top of the main tower 13, the first traction hoist 1 and the second traction hoist 12 are installed on the beam surface of the main beam 16, and the two traction hoists are respectively installed on the main tower. 13 sides. The main traction wire rope 6 passes through the tower top bracket 7, and the first pulley group 4 and the second pulley ...
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The invention discloses a method for hanging and installing a stay cable of a cable-stayed bridge special-shaped tower pillar in a special construction environment. According to the method, a main load cable is taken as the stress body, and the main load cable is driven by power winches and load cables arranged on the beam surfaces of the two sides of a main tower to move in the obliquely vertical direction on the two sides of the tower pillar; when the distance between an anchor cup at the front end of the body of the stay cable in the air and the tower pillar is too small, the distance can be adjusted by means of the traction power winch and the load cable located on the same side as the stay cable. The hoisting system is small in occupied height, oblique hoisting can be achieved, the problems of conventional tower canes and tower top lifting frames that occupied height is large and only vertical hoisting can be achieved are effectively solved, and stay cable hoisting safety is guaranteed when the tower pillar is in a special shape.
Description
technical field [0001] The invention belongs to the technical field of bridge building construction, and in particular relates to a cable-stayed cable-hanging installation method for a special-shaped tower column of a cable-stayed bridge under a special construction environment. Background technique [0002] During the cable-stayed construction of long-span cable-stayed bridges, the tower crane next to the tower cannot meet the hoisting requirements of the cable-stayed cables due to the heavy weight of the cable-stayed cables. For hoisting operations, when the site of the main tower of the cable-stayed bridge is located in a special area (such as near the airport, there is a requirement for flight take-off and landing routes), conventional tower cranes and tower top hangers are not suitable due to their own height restrictions. At the same time, with the rapid development of bridge technology, especially cable-stayed bridge technology, the structural form of the main tower o...
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IPC IPC(8): E01D21/00
CPCE01D21/00
Inventor 付东高海安左宏献张召
Owner 中铁大桥(郑州)缆索有限公司