Semi-integrated seamless bridge structure adaptive to soft foundation

A semi-integral, seamless bridge technology, applied to 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.

CN106638256AActive Publication Date: 2017-05-10SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-05-10

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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. Because the expansion device at the abutment is eliminated, 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 transferred to the junction of the slab and the road through the slab, thus changing the 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] Traditional semi-monolithic seamless bridges generally integrate the main girder and the slab structure into one to form a multi-span structural continuous system to overcome the problem of easy cracking and damage of the continuous part of the traditional simply supported beam bridge and poor seismic perfo...

Examples

Embodiment

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

[0025] Among them, two adjacent spans are provided with tension and compression combination members, between the main beam 1 and the slab 18, there is a tension and compression combination member; there are tension and compression combination members including reinforcing steel bars 7, PBL shearing device openings Plate 8, perforated steel bars 21, tensile top plate 9, shallow embedded slab 10, deep embedded slab 11, and beam end trapezoidal bump compression rod 16.

[00...