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A composite construction method for the main girder of a cable-stayed bridge and its counterweight structure system

A construction method and technology of cable-stayed bridges, which are applied in the direction of cable-stayed bridges, bridges, bridge construction, etc., can solve the problems that the construction technology cannot be realized, and the clearance cannot meet the requirements of hanging basket hanging pouring, etc., so as to protect property safety and life safety , the application of counterweight is flexible, and the effect of reducing construction cost

Active Publication Date: 2018-11-20
BEIJING URBAN CONSTR ROAD & BRIDGE GROUP
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cable-stayed bridge main girder combined construction method and its counterweight structure system, to solve the problem that the existing cable-stayed bridge concrete main girder intersects with the river dam and the headroom cannot meet the requirements of hanging basket suspension casting, Technical problems that cannot be realized by the traditional cantilever pouring construction technology on both sides of the main beam

Method used

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  • A composite construction method for the main girder of a cable-stayed bridge and its counterweight structure system
  • A composite construction method for the main girder of a cable-stayed bridge and its counterweight structure system
  • A composite construction method for the main girder of a cable-stayed bridge and its counterweight structure system

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Embodiment Construction

[0053] Examples see Figure 1-9 As shown, a cable-stayed bridge main girder combination construction method, the nth block 12 to the n+mth block 12 of the side span 1 of the cable-stayed bridge main girder intersects obliquely with the dam area 2, where n> 2, m≥1, in this embodiment n=8, m=4 construction steps are as follows:

[0054] Step 1, design scaffolding foundation: the width of scaffolding foundation is greater than the width of cable-stayed bridge girder, and the length of scaffolding foundation is greater than the length of No. 8 block to No. 12 block of side span to be constructed; Dam area is divided into dam area, For the side slope area and the sub-dam area, the scaffolding foundation includes the over-dam foundation 3 poured along the site above the dam, the side slope foundation 4 poured along the surface of the steps after excavating along the dam in the step-like direction of the side slope area, and the site along the sub-dam area. Poured sub-dam foundation...

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Abstract

The invention provides a combined construction method of a cable-stayed bridge main beam and a counterweight foundation structure system of the construction method. The construction method comprises the following steps: designing a scaffold foundation, designing an excavation slope and step height of a dam at an edge slope region, designing the counterweight structure system of an nth block to a (n+m)th block of a mid-span, excavating the dam, wholly pouring the scaffold foundation and a counterweight foundation, carrying out symmetrical construction on a side-span and the mid-span of a main beam block by block by adopting a construction method for pouring by adopting a symmetrical hanging basket cantilever at two sides, and constructing an nth block to a (n+m)th block of the side-span and the like. The counterweight system provided by the invention comprises the scaffold foundation and the counterweight structure system. A combined construction technology of a main beam front-support-point hanging basket cantilever pouring method and a bracket cast-in-place method is adopted and two technologies are combined together, so that a side-span main beam which cannot meet hanging basket cantilever pouring is constructed; meanwhile, a mid-span main beam and the side-span main beam are symmetrically constructed and a stress state of a cable-stayed bridge is wholly met; a working period is shortened and the construction cost is reduced.

Description

technical field [0001] The invention relates to a construction method of a cable-stayed bridge, in particular to a combined construction method of hanging basket suspension construction and support cast-in-place construction of a cable-stayed bridge and a counterweight system thereof. Background technique [0002] At present, in terms of engineering construction design in the world, when crossing natural landforms such as valleys, rivers, ravines, and sea-crossing bridges, several main bridge forms such as cable-stayed bridges, suspension bridges, and long-span tied arch bridges are adopted. It is the most widely used bridge form in recent years. A cable-stayed bridge is mainly composed of a foundation, a main tower, a main girder, and stay cables. [0003] The construction of concrete main girders of cable-stayed bridges mostly adopts the suspension casting of front fulcrum hanging baskets. It will intersect with the dam of the river, and the external factors cannot be ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D21/00E01D11/04
CPCE01D11/04E01D21/00
Inventor 马德元刘贵宾李东旭陈卫彬罗斌谭宗成刘长宇孙圣明胡赫桐罗海彭张鑫赵伟马德利彭浩陈敏程东峰曲鹏
Owner BEIJING URBAN CONSTR ROAD & BRIDGE GROUP
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