Blasting method of through oblique-pulling truss girder bridge

A cable-stayed and truss technology, which is applied in blasting, bridges, bridge construction, etc., can solve problems such as the impact on navigation, and achieve the effects of shortening the construction period, reducing impact, and reducing the degree of impact

Active Publication Date: 2017-11-07
CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that it has a certain impact on navigation, and the blasting program needs to be approved

Method used

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  • Blasting method of through oblique-pulling truss girder bridge
  • Blasting method of through oblique-pulling truss girder bridge
  • Blasting method of through oblique-pulling truss girder bridge

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Embodiment Construction

[0038] In order to further illustrate the technical means adopted by the present invention and its effects, the following is a detailed description in conjunction with preferred embodiments of the present invention.

[0039] A method for blasting a cable-stayed truss girder bridge, the blasting method is divided into the following steps:

[0040] Step 1. Filling of the river: fill the two sides of the bridge towards the center of the river, the height of the filling is 1m higher than the normal water level, and the filling is perpendicular to the direction of the river to the edge of the bridge cap, and the width of the filling is determined according to the actual situation, such as figure 1 shown;

[0041] Step 2. Cleaning up the range of the river course: build construction access roads on both sides of the bridge, use dredgers to clear the silt at the bottom of the canal, and excavate a trench with a certain width between the two piers in the river channel, at least 5 mete...

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Abstract

The invention discloses a blasting method of a through oblique-pulling truss girder bridge. The blasting method comprises the following steps of 1, filling of a river channel with land; 2, cleaning in the range of the river channel; 3, blasting designing, drilling and explosive charging; 4, blasting network and sequence establishing; 5, guard setting and blasting initiation; and 6, cleaning after blasting. The whole bridge is removed at a time through blasting by combining a drilling blasting method with a water pressure blasting method, girders in the river channel all fall into a dug trench after the blasting, the construction cost is low, the construction safety control difficulty is low, the construction difficulty is low, the influence on later construction is small, the dust diffusion distance is effectively shortened, the time of occupying a shipping lane is greatly shortened, and the blasting method is particularly suitable for busy shipping lane sections having high navigation requirements and not allowing long-time navigation suspension.

Description

technical field [0001] The invention relates to a method for dismantling a bridge, in particular to a method for blasting a cable-stayed truss beam bridge. Background technique [0002] The upper structure of the under-supported cable-stayed truss girder bridge adopts a large-span under-supported prestressed concrete truss girder, and the exterior is a statically indeterminate system. Type abutment, bored pile foundation, the bridge head is connected with the approach road by a straight wall. [0003] Combined with the bridge demolition methods often used at present, the following options are available for comparison and selection for the demolition of prestressed concrete truss girder bridges: [0004] 1. Cutting and lifting method: The bridge deck and the auxiliary structure of the bridge deck are removed by small machinery, and then the stressed part of the truss is removed by cutting and lifting. When demolishing the bridge, the reverse process method can be used to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/00E01D24/00
CPCE01D22/00F42D1/00F42D3/00
Inventor 于亚臣毋存粮崔浩叶雨山张承实郭永富张维景玉婷韩彦舟孙赞浩白子民李享达王娟要胜利
Owner CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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