Engineered cementitious composite seamless bridge and construction method thereof

A technology of ultra-high toughness and composite materials, applied in bridges, bridge materials, bridge construction, etc., can solve the problems of harmful substances intrusion, easy damage, etc., to improve the bending resistance, reduce the tensile force of the main girder, and reduce damage Effect

Active Publication Date: 2019-02-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It aims to solve the problem that the existing seamless bridge connecting line surface is easily damaged under the action of vehicle ...

Method used

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  • Engineered cementitious composite seamless bridge and construction method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Construction method of seamless bridge made of ultra-high toughness cement-based composite material

[0048] 1) Pouring the abutment back of the abutment and building the roadbed, the roadbed is a concrete base, SBS modified asphalt synchronous crushed stone seal, road base;

[0049] Concrete base: clean up the dirt in the base; support formwork; pour C15 concrete base; vibrate and level the poured concrete;

[0050]SBS modified asphalt synchronous gravel seal: the synchronous gravel seal vehicle evenly spreads SBS modified asphalt and gravel, and uses rubber-tyred road rollers to closely follow the rolling;

[0051] Pavement base: The pavement base is cement-stabilized gravel; after the stabilized soil is mixed, it is transported by dump truck; the paving and shaping of the mixture are paved and leveled manually with paver.

[0052] 2) Preparation of ultra-high toughness cement-based composite materials.

[0053] ① Calculated per cubic meter, the masses of cement, fl...

Embodiment 2

[0068] A seamless bridge made of ultra-high toughness cement-based composite materials, including an abutment 8 and a foundation beam 10, the abutment 8 and the foundation beam 10 are respectively located on both sides of the bridge, and the side of the abutment 8 close to the road surface is from top to bottom Set the first asphalt concrete layer 5, leveling layer 6, and hollow slab 7, the first asphalt concrete layer 5 is located above the horizontal line of the abutment top, the side of the foundation beam 10 near the road surface is the road base 9, the first asphalt Between the concrete layer 5 and the foundation beam 10 is a composite material layer 2, a concrete base layer 12 is set between the abutment 8 and the base beam 10, the composite material layer 2 is located above the concrete base layer 12, and the surface layer of the bridge deck is provided with an upper layer 1. A carbon fiber mesh 4 is arranged horizontally in the middle of the composite material layer 2, ...

Embodiment 3

[0079] Ultra-high toughness cementitious composite material (Engineered Cementitious Composite, referred to as ECC) is a kind of cement composite material with high performance. Experimental studies have found that this composite material exhibits obvious strain hardening characteristics under both tensile and bending loads, because it can convert the macroscopic cracking mode of a single crack in traditional cement-based materials under tension into multiple cracks. The microscopic cracking mode of fine cracks, so this material can still maintain a large bearing capacity and work with cracks after cracks appear. ECC materials have high ductility, high toughness and high energy absorption capacity. The maximum crack width at ultimate load is around 50 μm. The ultimate tensile strain measured by tensile and bending tests is above 3%, and the average crack distance is about 1mm. ECC has strong toughness and durability, and can meet the long-term vehicle load.

[0080] Carbon ...

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Abstract

The invention belongs to the technical field of bridge building construction, and relates to an engineered cementitious composite seamless bridge and a construction method thereof. The engineered cementitious composite seamless bridge comprises a bridge abutment, a foundation beam and structural layers, the bridge abutment and the foundation beam are located on the two sides of a bridge correspondingly, a first asphalt concrete layer, a leveling layer and a hollow slab are arranged on the structural layer of the side, close to the pavement, of the bridge abutment from top to bottom, the firstasphalt concrete layer is located above the horizontal line on the top of thebridge abutment, the structural layer of the side, close to the pavement, of the foundation beam is a pavement base layer,the structural layer between the first asphalt concrete layer and the foundation beam is a composite material layer, the structural layer between the bridge abutment and the foundation beam is a concrete base layer, the composite material layer is located above the concrete base layer, the structural layer on the bridge surface is a second asphalt concrete layer, a carbon fiber net is horizontallyarranged in the middle of the composite material layer, and the carbon fiber net is located below the horizontal line at the top of the foundation beam. The problem that gaps of the bridge have bad effect on normal travelling of vehicles is solved.

Description

technical field [0001] The invention belongs to the technical field of bridge building construction, and in particular relates to a seamless bridge made of ultra-high toughness cement-based composite material and a construction method. Background technique [0002] In order to solve the deformation problem caused by temperature, small and medium-sized bridges generally set expansion joints in the bridge. However, due to the long-term impact of external vehicle loads and external erosion, bridge expansion joints are very vulnerable to damage. In order to overcome these difficulties, the characteristics of continuous reinforced concrete pavement that allows cracks to work can be used, and the two ends of the slab are respectively connected with the main beam and the concrete pavement to form a semi-integral fully seamless bridge system. At present, the material used for semi-integral seamless bridge joint pavement is generally ordinary continuous reinforced concrete. Due to ...

Claims

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Application Information

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IPC IPC(8): E01D1/00E01D19/02E01D19/04E01D19/12E01D21/00E01D101/24
CPCE01D1/00E01D19/02E01D19/04E01D19/125E01D21/00E01D2101/24Y02A30/30
Inventor 孙仁娟王怡凯葛智管延华胡鑫磊韩乐冰冯玉洁张欣左宁
Owner SHANDONG UNIV
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