Construction Drawing of 1X20 Post tensioned Prestressed Concrete Simply Supported Small Box Girder Bridge

Data List Layout of Bridge Location Layout of Bridge Profile Layout of Bridge Type Coordinate Map of Pile Location Cross Section of Upper Structure Hollow Slab General Structure Drawing 2 Side Slab Ordinary Reinforcement Structure Drawing 2 (c ＝ 0, α ＝ 30) Middle Slab Ordinary Reinforcement Structure Drawing 1 (α ＝ 30) Prestressed Tendon Structure Drawing Middle Slab Ordinary Reinforcement Structure Drawing 2 (α ＝ 30) Structural Drawing of Hinged Joint Reinforcement Structural Drawing of Obtuse Angle Reinforcement on Bridge Deck Structural Drawing of Reinforcement at Anchor Sealing End Structural Drawing of Embedded Steel Plate on Hollow Slab Support Schematic Diagram of Bearing Installation Structural Drawing of Reinforcement for Deck Pavement Structural Drawing of Reinforcement for Bearing Padstone Reinforcement Layout of Anchor Bolt Reinforcement General Structural Drawing of Abutment Structural Drawing of Reinforcement for Abutment Capping Beam Structural Drawing of Reinforcement for Ear Wall Structural Drawing of Reinforcement for Abutment Retaining Block Structural Drawing of Reinforcement for Pile Foundation Inspection Tube Layout Left Structural Drawing of Reinforcement of Abutment Pile Foundation (II) Structural Drawing of Deck Drainage Layout of New Pedestrian Slab Structural Drawing of Handrail D40 Structural Drawing of Expansion Joint Structural Drawing of Canal Diversion Structural Drawing of Abutment Approach Slab General Layout of Abutment Approach Slab Structural Drawing of Reinforcement of Approach Slab Channel Diversion Quantities of Branch Canal Quantities of Bridge Pedestrian Slab Calculation Formula of Conical Slope

Construction drawing of prestressed concrete simple supported slab bridge: plan, section, bridge deck structure drawing, cross section of prestressed concrete hollow slab, approach precast slab structure, prestressed concrete hollow slab middle block reinforcement drawing, prestressed concrete hollow slab side block reinforcement drawing, slab end reinforcement drawing, slab end embedded parts schematic diagram, slab end embedded parts detail drawing, abutment cap reinforcement drawing The middle block reinforcement diagram of prestressed concrete hollow slab, the side block reinforcement diagram of prestressed concrete hollow slab, the schematic diagram of embedded parts at the end of the slab, the reinforcement part diagram, the abutment cap reinforcement diagram, and the detail drawing of embedded parts at the end of the slab.

This bridge adopts 3x25m=75m C50 prestressed concrete simply supported hollow slab beam. The bridge is orthogonal to the river, and the river has no navigation requirements.

Technical standards:

(1) Design reference period: 100 years, design service life: 50 years, design safety level: Grade I.

(2) . Bridge design load standard: urban level B; Population: 4.05KN/m2.

(3) . Standard cross section of bridge:

2.25m (sidewalk+railing)+11m (roadway)+2.25m (sidewalk+railing)=15.5m.

(4) The bridge is orthogonal to the river channel, and the center stake is K2+051.646.

(5) Bridge deck pavement: 12cm C50 waterproof concrete (W6) pavement.

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The superstructure adopts post tensioned prestressed concrete simply supported hollow slab beam with a span of 25m. There are 30 25m medium plates and 6 side plates in this project.

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A total of 14 sheets were prepared in 2015.

1. The structural system in this general drawing is simply supported structure, which is designed according to partially prestressed Class A members. 2. The plane bar structure calculation software is used for design calculation. The cast-in-place layer of the bridge deck participates in the structural stress. The transverse load distribution coefficient is calculated by the hinged plate method and checked by the space structure calculation software. 3. Design parameter (1) Concrete: gravity γ=26.0kN/m3, elastic modulus Ec=3.25 × 104MPa. (2) Prestressed reinforcement: elastic modulus Ep=1.95 × 105MPa, relaxation rate ρ=0.035, relaxation coefficient ξ=0.3. (3) Anchorage: anchorage deformation and rebar retraction are calculated as 6mm (one end); Metal bellows friction coefficient μ=0.25, deviation coefficient κ=0.0015. (4) Vertical gradient temperature effect: take the value according to the General Code for Design of Highway Bridges and Culverts (JTG D60-2004). 　　

Detailed drawing of general structural node of post tensioned prestressed simply supported hollow slab

This bridge adopts 3x25m=75m C50 prestressed concrete simply supported hollow slab beam. The bridge is orthogonal to the river, and the river has no navigation requirements.

Technical standards:

(1) Design reference period: 100 years, design service life: 50 years, design safety level: Grade I.

(2) . Bridge design load standard: urban level B; Population: 4.05KN/m2.

(3) . Standard cross section of bridge:

2.25m (sidewalk+railing)+11m (roadway)+2.25m (sidewalk+railing)=15.5m.

(4) The bridge is orthogonal to the river channel, and the center stake is K2+051.646.

(5) Bridge deck pavement: 12cm C50 waterproof concrete (W6) pavement.

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The superstructure adopts post tensioned prestressed concrete simply supported hollow slab beam with a span of 25m. There are 30 25m medium plates and 6 side plates in this project.

The pier is of pile type, and the abutment is of gravity type. According to the geological conditions along the bridge, friction piles are used for pile foundation.

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45 sheets in total, prepared in 2015.

Data Catalog Description Superstructure Material Quantity Table Superstructure Standard Cross sectional Drawing Hollow Slab General Structural Drawing Side Slab Prestressed Tendon and Reinforcement Layout (I) Side Slab Prestressed Tendon and Reinforcement Layout (II) Side Slab Prestressed Tendon and Reinforcement Layout (III) Side Slab Prestressed Tendon and Reinforcement Layout (IV) Layout of Prestressed Tendon and Reinforcement of Medium Slab (I)... 18 drawings

The total length of the bridge is 96m, and the whole bridge has three spans: 3X30m. The superstructure is prestressed concrete (post tensioned) box girder, which is simply supported first and then continuous. The beam height is 1.6m, and the thickness of the wing plate is 0.18m. The bridge deck is transversely composed of 10 beams, a total of 30 beams, including 12 edge beams and 18 center beams. The center beam weighs 87 tons, and the side beam weighs 97 tons

Design basis: Technical Code for Construction of Highway Bridges and Culverts (JTG/TF50-2011); Standard for Evaluation of Technical Conditions of Highway Bridges (JTG/T H21-2011)

Highway class: Class II highway. Design load class of bridge: highway - Class I. The cross section of the bridge is composed of 11m (carriageway)+2x0.5m (guardrail). The upper structure adopts 1x20m prestressed T-beam prestressed concrete (post tensioned) simply supported T-beam; The substructure adopts U-shaped abutment, and the abutment adopts expanded foundation with an angle of 90 degrees. The plane of this bridge is on a straight line, the cross slope of the bridge deck is two-way 2%, and the longitudinal slope of the longitudinal section is -1.047%. No. 0 abutment adopts GJZF200x250x54 type PTFE plate rubber bearing; GJZ250x300x52 plate rubber bearing is adopted for No. 1 abutment; Expansion joints are set at 0 # abutment, and 1 # abutment is continuous. The length of left and right abutment rear approach slabs is 6m.

The first layer of borehole 1 is filled soil, the second layer is silty clay, the third layer is silty clay, the fourth layer is strongly weathered tuff, the fifth layer is moderately weathered tuff, and the sixth layer is slightly weathered tuff. The first layer of borehole 2 is filled soil, the second layer is silty clay, the third layer is silt, the fourth layer is loam, the fifth layer is strongly weathered tuff, the sixth layer is moderately weathered tuff, and the seventh layer is slightly weathered tuff.

Road grade: urban trunk road; Two way four lane, design speed 60km/h. The subgrade width is 30m. The minimum length of horizontal curve is 221.05m, and the minimum length of transition curve is 50m. The maximum longitudinal slope is - 2%, and the minimum longitudinal slope is - 0.3%. The carriageway is 18m wide, the sidewalk is 2 × 3m wide, and the green belt width is 2 × 3m. The length is 25.04m, and the layout of subgrade cross section: 3m (sidewalk)+3m (green belt)+2 × 9m (carriageway)+3m (green belt)+3m (sidewalk)=30m.

Highway - Class I; 3x10 prestressed concrete (post tensioned) simply supported hollow slab, continuous bridge deck, bridge length: 35.04m, net width of bridge deck: 2x net 12.5m. The substructure abutment adopts ribbed slab abutment, the pier adopts column pier, and the pier abutment adopts pile foundation. The plane of the bridge is on a straight line. The cross slope of the bridge deck is 1.5% in both directions, and the longitudinal slope of the longitudinal section is - 0.4%. The abutment adopts GJZF/4200x250x44 type tetrafluoro sliding plate type rubber bearing, and the pier adopts GJZ200x250x42 type plate type rubber bearing; QMF-40 expansion joint is adopted for 0 # and 3 # abutments. Friction piles (φ 8, 16, 25) are used for all pier and abutment pile foundations. The height of cone slope at small stake is 3.6m, and that at large stake is 5.0m. The drainage pipe is set at the lower side of the bridge deck. There are 14 sets of drainage pipes for the whole bridge. The length of approach slab behind abutment is 6m. At 1300mm from the short edge of the hollow slab to the slab end, a reserved hole of 80 × 25mm is set at the side with the hinge joint. For the side slab, a reserved hole of 80 × 40mm is set at the root of the cantilever to facilitate the lifting of the hollow slab.

...... 43 CAD sheets in total, designed in 2013

Scope of application:

Design speed: 250km/h for passenger cars and below, 120km/h for freight cars (80km/h for C64 and C62) and below. Line condition: double track, straight line, curve, minimum curve radius 4000m, main line distance 4.6m. Environment category and action level: the ground structure without protective measures under general atmospheric conditions, the environment category is carbonization environment, and the action level is T1, T2. Design service life: the design service life of the beam structure under normal service conditions is 100 years. Check calculation type of long and large freight cars: this design only checks and calculates common D2, D30 and D35 trains when they pass. Construction method: this drawing is applicable to centralized prefabrication and erection of bridge erecting machine on site. Seismic intensity: this structure is applicable to areas with seismic fortification intensity of 8 degrees and below (seismic peak acceleration Ag ≤ 0.3g). Maintenance mode: no sidewalk inspection vehicle is set on the bridge.

Design principles and technical parameters:

（1） Structure:

The section type is single box, single room and simply supported box girder. The top plate and web at the beam end are locally thickened inward, and the bottom plate is thickened inward and outward respectively. Bridge deck width: the clear width inside the ballast wall is 9.0m, the clear width inside the sidewalk railing on the bridge is 12.1m, the bridge deck is 12.2m wide, and the total width of the bridge building is 12.48m. The length of the beam is 24.6m, the calculated span is 23.5m, the beam height at the center of the mid span section is 2.89m, the beam height at the center of the fulcrum section is 3.09m, and the center distance of the support across the bridge is 4.7m.

（2） Design load:

The thickness of ballast under sleeper is 35cm. Including the weight of rail, ballast, sleeper, waterproof layer, protective layer, sidewalk railing, shutter or sound barrier, protective wall, catenary pillar, cable trough cover plate, vertical wall and other ancillary facilities. The straight beam with sound barrier is 193.5KN/m, and the curved beam is 206.5kN/m; The straight beam of silent barrier is 174.5kN/m, and the curved beam is 187.4kN/m.

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34 sheets in total, designed in 2009

Design load: highway - Class I. Type of bridge superstructure: prestressed concrete hollow slab. Cross slope of bridge deck: two-way 1.5% of carriageway. Design flood frequency: 1/100. Channel class: not navigable. Seismic peak acceleration coefficient: 0.05g; This bridge is a channel bridge with a total length of 68m. In order to prevent scouring, the upstream and downstream of the bridge are considered to be 30m long, and mortar rubble is used for protection. The upper structure of the channel bridge is 3x10 prestressed concrete (post tensioned) simply supported hollow slab (80 × 25mm reserved holes are set at the short edge 1300mm away from the slab end, and 80 × 40mm reserved holes are set at the bottom of the cantilever for the side slab to facilitate the lifting of the hollow slab). The bridge deck is continuous, and the bridge length is 35.04m. Clear width of bridge deck: 1x clear 19m. The substructure adopts column pier, and the pier and abutment adopt pile foundation (diameter 8, 16, 25mm). The plane of the bridge is on a straight line, the cross slope of the bridge deck is two-way 1.5%, and the longitudinal section is on the vertical curve of R=14200m. GJZF150x200x44 PTFE sliding plate type rubber bearing is adopted for abutment; GJZ150x200x42 plate rubber bearing is adopted for pier; QMF-40 expansion joint is adopted for 0 # and 3 # abutments. The length of the left abutment rear approach slab is 6m, and the right abutment rear approach slab is 6m.

Main materials: Portland cement with high quality strength grades of 62.5, 52.5 and 42.5 shall be used as cement. b) Coarse aggregate shall be continuously graded, and crushed stone shall be produced by hammer crushing. C50c concrete is used for precast hollow slab, anchor sealing end and hinge joint; C40 concrete shall be used as the end sealing concrete of cast-in-place layer of bridge deck. Waterproof concrete is used for bridge deck pavement. Ordinary reinforcement adopts HPB235 and HRB335 reinforcement. The mechanical performance index of prestressed reinforcement shall comply with the specification.

...... 41 sheets in total, designed in 2014