Semi-integral seamless bridge structure adapted to soft ground

A semi-integral, seamless bridge technology, applied in the direction of bridges, bridge parts, bridge construction, etc., can solve the problem of increasing the axial force on the eccentricity of the center of gravity of the section, the increase of the arch deformation of the prefabricated beam section, and the span of the main beam. Problems such as cracking at the upper and middle edges can be eliminated, and the effects of reducing additional internal force, reducing material consumption, and simplifying the construction process can be achieved.

CN106638256BActive Publication Date: 2018-03-30SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-03-30

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Abstract

The invention discloses a semi-integrated seamless bridge structure adaptive to a soft foundation. The semi-integrated seamless bridge structure comprises a main beam, piers, approach slabs and abutments, wherein the main beam and the approach slabs are connected into a whole, and the upper surface of the whole is sequentially paved with a bituminous concrete pavement layer, a waterproof layer and a leveling layer of a reinforced concrete pavement layer from top to bottom. Pavement steel bars are arranged in the reinforced concrete pavement layer. The main beam comprises a plurality of spans, a pull-press combined component is arranged between every two adjacent spans, and pull-press combined components are also arranged between the main beam and the approach slabs. Each pull-press combined component comprises a reinforcing steel bar, a PBL anti-shearing device perforated panel, a hole-penetrating steel bar, a pull-resisting top plate, a shallow embedded plate, deep embedded plates and a beam end trapezoidal lug pressing rod. The continuous main beam structure is simplified into the continuous pull-press combined components on a bridge deck, additional internal force brought by differential settlement to the structure is remarkably reduced, and material consumption is lowered; and meanwhile, side effects caused by adding of materials are avoided. The construction process and the structure form are simplified, the structure stress performance is improved, and the construction quality is easy to guarantee.
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Description

technical field

[0001] The invention relates to the technical field of bridge construction, in particular to a semi-integral seamless bridge structure adapted to soft ground. Background technique

[0002] (Semi) Integral Seamless Bridge Since the expansion device at the bridge abutment is canceled, the expansion joints at both ends of the bridge are moved to the end of the slab, and the temperature deformation of the main girder is transmitted to the connection between the slab and the road through the slab, thus becoming a bridge. The expansion joint is a road joint, which simplifies the joint structure, improves the performance of the bridge, and reduces the maintenance cost.

[0003] In traditional semi-integral seamless bridges, the main girder and the slab structure are generally poured together to form a multi-span structural continuous system, so as to overcome the problems that the continuous part of the traditional simply supported bridge deck is easy to crack and d...

Examples

Embodiment

[0024] Such as Figure 1 to Figure 3 As shown, a semi-integral seamless bridge structure adapted to soft soil foundation, including main girder 1, pier 2, butt plate 18, abutment 19, the main girder 1 and the butt plate 18 are connected as a whole, the whole top from A leveling layer including asphalt concrete pavement 3, waterproof layer 4, and reinforced concrete pavement layer 5 is laid sequentially from top to bottom. The reinforced concrete pavement layer 5 is provided with paving steel bars 6, and the main beam 1 includes several spans.

[0025] Among them, a tension-compression composite member is provided between two adjacent spans, a tension-compression composite member is provided between the main girder 1 and the strap 18; a tension-compression composite member is provided including reinforcing steel bars 7, openings of the PBL shear device Plate 8, perforated steel bar 21, tensile roof 9, shallow embedded slab 10, deep embedded slab 11 and beam end trapezoidal bump...