Standards, Codes and Regulations for Urban Bridge Engineering

Code for Construction and Quality Acceptance of Urban Bridge Engineering, CJJ2-2008

Technical Regulations for Structural Reinforcement of Urban Bridges CJJ/T239-2016

Technical Regulations for Waterproofing Engineering of Urban Bridge Decks, CJJ139-2010

Technical Standard for Urban Bridge Maintenance CJJ99-2017

《道桥用改性沥青防水卷材》JC/T974—2005

《道桥用防水涂料》JC/T975—2005

"Technical Specification for Preloading of Steel Pipe Full Hall Bracket" JGJ/T194-2009

"Construction Quality Acceptance Standards for Steel Structure Engineering" GB50205-2020

"Steel Structure Design Standards" GB50017-2017

General Code for Steel Structures GB55006-2021

"Steel Welding and Acceptance Regulations" JGJ18-2012

Steel for Reinforced Concrete Part 1: Hot-rolled Round Steel Bars GB/T1499.1-2017

Steel for Reinforced Concrete Part 2: Hot-rolled Ribbed Steel Bars GB/T1499.2-2018

"Waste Heat Treatment of Steel Reinforcement for Reinforced Concrete" GB13014-2013

"Technical Regulations for Mechanical Connection of Steel Reinforcement" JGJ107-2016

《钢筋机械连接用套筒》JG/T163—2013

Code for Construction and Acceptance of Water Supply and Drainage Pipeline Engineering, GB50268-2008

Code for Construction and Acceptance of Water Supply and Drainage Structures GB50141-2008

"Sliding Template Engineering Technical Standard" GB/T50113-2019

《环氧树脂涂层钢筋》JG/T502—2016

"Concrete Strength Inspection and Evaluation Standard" GB/T50107-2010

"Safety Technical Code for Bowl Buckle Steel Pipe Scaffolding for Building Construction" JGJ166-2016

"Safety Technical Standard for Gantry Steel Pipe Scaffolding for Building Construction" JGJ/T128-2019

"Safety Technical Code for Fastener-type Steel Pipe Scaffolding for Building Construction" JGJ130-2011

"Safety Technical Standard for Socket Disc Buckle Steel Pipe Scaffolding for Building Construction" JGJ/T231-2021

Technical Code for Cold-Formed Thin-walled Steel Structures GB50018-2002

《冷轧带肋钢筋》GB/T13788—2017

"Design Code for Ordinary Concrete Mix Ratio" JGJ55-2011.

《预拌混凝土》GB/T14902—2012

"Unbonded Prestressed Steel Strand", JG/T161-2016

《预应力混凝土用钢丝》GB/T5223—2014

"Steel strands for prestressed concrete" GB/T5224-2014

"Metal bellows for prestressed concrete" JG/T225-2020

"Plastic corrugated pipes for prestressed concrete bridges" JT/T529-2016

"Anchors, fixtures and connectors for prestressed tendons" GB/T14370-2015

Technical specification for the application of anchors, fixtures and connectors for prestressed tendons, JGJ85-2010

"Technical Specification for Composite Steel Formwork" GB/T50214-2013

Yesterday 速记口诀4/25

1. Box culvert jacking starts

The command idling tightens the top test, and the back (backup) part of the perimeter inspection is not started

2. Box culvert jacking excavation

The man-machine continuous side is excellent, and the digging view cooperates with the prohibition of robbery

3. Box culvert jacking operation

Adjust and replace the back (backup) view

4. Box culvert jacking monitoring and inspection

The starting time of the measurement and recording

Three days ago, shorthand mantra 4/23

1. Cable-stayed bridge composition

Cable beam towers

2. The construction method of the tower

The knot body material is prepared, and the naked climb beam is hung

3. Technical requirements and precautions for tower construction

Cross-contamination pours the prop up, depending on the impact of the two pumps

4. Safety measures for tower construction

The tower crane is limited to torsional wind, and the calculation and inspection affect the accident prevention

5. Construction method of main girder of cable-stayed bridge

Push-turn suspension

6. Construction of concrete main beam

No. 0 non-consolidated, wind resistance performance, large span stitching

7. Construction of steel girder of cable-stayed bridge

The qualification is damaged and corroded, and the finished product is coated with the control material

8. Monitoring objects for cable-stayed bridge construction

The tension beam tower is moved

9. The purpose of monitoring the construction of cable-stayed bridges

The feedback determines the pull beam movement

10. The main content of cable-stayed bridge construction monitoring

The shape and range axis deviates from the tower translation, and the cable tower should change the temperature field

Seven days agoShorthand mantra 4/19

1. Cast-in-situ prestressed concrete continuous beam by bracket method

The foundation is arranged, the landing frame is dismantled, the pre-arch is eliminated, and the sinking is avoided

2. Pouring a prestressed concrete continuous beam on the moving formwork

Long group seams, poor built-in

3. Design and assembly of hanging baskets

Quality-ratio variable tilt anchor limit inspection

4. Pouring paragraph

Top 0 overhang

5. Suspension pouring sequence

0 side neutralization

6. Check the content of the beam section before pouring concrete

The backboard rib tube is buried, and the machine is mixed with the seam

7. The tensile sequence of the longitudinal prestressed tendons of the roof and web of the prestressed concrete continuous beam

Pull symmetrically up and down, left and right

8. Prestressed concrete continuous beam closure sequence

Edge times

9. Closing regulations for continuous beams (T structures).

Duan Changguan is even loose, and the warm mix is pre-pressurized

10. System conversion regulations for continuous beams (T structures).

Tension and grouting are about to be released

11. Provisions for the adjustment of the bearing reaction force of continuous beams (T structure).

High dominant

12. Elevation control of cantilever pouring method

The temperature has been poured pre-deformed

Two weeks agoShorthand mantra 4/12

1. Prestressed concrete raw materials

Priority should not be obtained, gravel anti-chlorine rust

2. Prestressed concrete pouring

Strengthen vibration and avoid collisions

3. Basic provisions of prestress tension

The force core is poor, and the anchor is initially recorded

4. Pre-tensioning prestressed construction

The center of the seat beam force, tensioning and releasing the broken pipe reinforcement

5. Prestressed tendon pipeline installation

Casing positioning ribs, welded through the hole

6. Installation requirements for prestressed tendons

Detection of moisture (salt) shall not be installed

7. Tensile requirements for prestressed tendons

Forced demolition and testing of Zhang Chao

8. Anchoring

After stabilization, the anchor seals the cutting head

9. Hole grouting

Check the secret in time to assess the temperature, and the mud sealing anchor is lifted to move strong

Five weeks ago, shorthand mantra 3/23a

1. Classification method of urban roads

Ground as a quality ring

2. Classification and basis of urban roads

Ground delivery service, set up road width

3. Classification method of urban road pavement

Structural mechanics, draining and rigidity

4. Pavement damage factors of urban roads

The resistance of small bends becomes large and soft, and the large bends become small and rigid

5、31502

The service life of the pavement structure design

6. Subgrade surface layer, subgrade pad subsurface surface

Composition of urban road structure

7. Tighten and stabilize the gradual (reduced) layer and appropriate seams

Principles of asphalt pavement road structure composition

8. The fine sand is not padded

Subbase setting

9. The medium tide is too wet and frozen water and soil

Bedding settings

10. Cold 5 times hot, waterproof and anti-slip abrasion modification

Uses of various asphalt mixtures