Whole-section symmetrical double-cantilever erection method for steel truss girder of beach large-span cable-stayed bridge
A cable-stayed bridge steel and long-span technology, applied in cable-stayed bridges, bridge construction, bridges, etc., can solve the problems of long construction period and high erection cost
Inactive Publication Date: 2021-04-23
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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[0003] The object of the present invention is to provide a method for erecting symmetrical double-cantilever sections of the steel truss girder of a large-span cable-stayed bridge on the beach to overcome the problems of high cost and long construction period for the steel truss girder erection of the cable-stayed bridge on the beach
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[0031] In order to further explain the technical means and effects adopted by the present invention to achieve the intended invention purpose, below in conjunction with the accompanying drawings and preferred embodiments, the whole segment of the steel truss girder of a long-span cable-stayed bridge on a beach proposed according to the present invention is symmetrically doubled. The specific implementation and working principle of the cantilever erection method will be described in detail.
[0032] The embodiment of the present invention provides a method for erecting symmetrical double cantilevers in the whole segment of a long-span cable-stayed bridge steel truss girder on a beach. The specific implementation process is as follows:
[0033] Step 1: the main tower foundation 3-1 construction, meanwhile, two columns of buttress piers 5 are set along the direction of transporting the entire section steel truss beam 1 on the beach, and the slideway beam 4 is set at the pier top o...
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The invention relates to the technical field of bridge construction, and is mainly suitable for erecting a large-span cable-stayed bridge in a beach area. The whole-section symmetrical double-cantilever erecting method for the steel truss girder of the beach large-span cable-stayed bridge comprises the steps that a main tower foundation is constructed; two columns of buttresses are arranged on the mudflat in the direction of transporting the whole section of steel truss girder, and slideway girders are arranged on the tops of the buttresses; constructing a main tower column; the whole section of steel truss girder is moved to the to-be-hoisted positions on the two sides of the main tower section by section along the slide way girder and stored on the slide way girder in advance; the whole section of steel truss girder is lifted section by section from the main tower to the two sides and symmetrically erected on the cantilever; a stay cable is hung and tensioned on the erected steel truss girder; and the steel truss girder is erected, stay cables are hung, tensioning is completed, and the slideway girder and the buttresses are disassembled. Compared with an existing erecting method, the bridge erecting construction cost can be reduced, the construction period is shortened, and the problem of idling is solved.
Description
technical field [0001] The invention relates to the technical field of bridge construction, and is mainly suitable for erecting long-span cable-stayed bridges in beach areas. Background technique [0002] With the rapid development of the national economy, the construction of long-span bridges in rivers, lakes and seas is becoming more and more common. Among them, the cable-stayed bridge is a bridge type that is widely used in long-span bridges. A cable-stayed bridge is mainly composed of a main tower, steel truss girders, and stay cables. In the beach area where the water and land alternately change, the existing technical schemes either adopt the push-up scheme and need to set up tall temporary piers, which is very costly, or adopt the assembly method of parts and the construction period is very long. In addition, due to the large size of the whole section of the steel truss girder, the factory production is completed, and due to the limitation of the site, it cannot be ...
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IPC IPC(8): E01D21/10E01D11/04E01D19/14
Inventor 刘爱林王令侠沈大才陈建华曹士运顿琳刘幸福赵鹍鹏
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD