Research and Application of QR Code Technology in High-Strength Bolt Construction Quality Control

Original article: https://cli.im/article/detail/1931

Abstract: As a connection method between steel bridge structural members, the construction quality of high-strength bolts directly affects the safety of bridge structures during both construction and operation phases. This study explores the application of QR code technology in quality control management of high-strength bolt construction. Focusing on three key aspects—workforce management, torque wrench control, and on-site construction supervision—the paper systematically presents the research and practical implementation of QR code technology in construction quality control, providing valuable insights for similar engineering projects.

1. Overview of High-Strength Bolt Construction Process

The construction process consists of four main stages: preparation, installation, tightening, and torque verification.

1.1 Preparation Phase

Includes documentation review, technical briefings, tool calibration, and worksite preparation:

• Documentation: Compilation of manufacturer certifications, test reports, and sampling records
• Technical Briefings: Safety and technical training for workers
• Tool Calibration: Daily pre-construction calibration and post-construction verification of torque wrenches
• Worksite Preparation: Bolt hole deburring and cleaning

1.2 Installation

Inserting bolts through pre-treated holes with proper washer orientation.

1.3 Tightening Process

Two-stage tightening operation:

• Initial Tightening: 50% of design torque
• Final Tightening: Full design torque Color-coded marking system indicates completion status.

1.4 Quality Verification

Quality inspectors conduct torque verification using specialized testing equipment according to specified frequencies.

2. QR Code-Based Quality Control Framework

2.1 Three-Pillar Control System

1. Workforce Management: Core control element
2. Tool Management: Quality assurance foundation
3. Construction Supervision: Operational nucleus

2.2 QR Code Implementation Strategy

1. Personnel Identification: QR-coded safety helmets containing:

   • Training records
   • Certification status
   • Work authorization

2. Tool Management System:

   • Embedded QR codes on torque wrenches recording:
     • Calibration history
     • Usage logs
     • Maintenance records

3. Construction Progress Tracking:

   • Structural unit-specific QR codes displaying:
     • Completion percentage
     • Inspection results
     • Acceptance status

2.3 Technical Requirements

• Robust backend management system
• Real-time data synchronization
• Durable physical labeling
• Multi-platform compatibility (WeChat/QQ scanning)

3. Implementation Methodology

3.1 Workforce Management

Table 1: QR-coded safety helmet implementation

3.2 Tool Control Protocol

Table 2: Torque wrench management matrix

3.3 Construction Monitoring

Table 3: Progress tracking parameters

4. Field Application Examples

4.1 Personnel Verification

Figure 1: Helmet QR code scanning

Figure 2: Worker information interface

4.2 Tool Tracking

Figure 3: Wrench calibration records

Figure 4: Tool usage history

4.3 Structural Unit Monitoring

Figure 5: Steel girder QR code placement

Figure 6: Digital progress dashboard

5. Conclusion

This implementation demonstrates that QR code technology significantly enhances quality control efficiency in high-strength bolt construction through:

• Improved traceability of personnel qualifications
• Real-time tool performance monitoring
• Transparent progress tracking
• Enhanced data integrity

The system establishes effective correlations between workforce competence, equipment reliability, and construction quality, providing a replicable model for similar infrastructure projects in the digital construction era.

References:

[1] JGJ 82-2011 Technical Specification for High-Strength Bolt Connections in Steel Structures
[2] JTG/T F50-2011 Technical Specifications for Construction of Highway Bridges and Culverts
[3] Liang Guicai. Innovative Application of QR Code Technology in Construction Management[J]. Construction Technology, 2015(46):159-160.
[4] Zhang Tao. Exploration and Practice of QR Code-Based Quality Traceability System in Construction Engineering[J]. Construction Safety, 2015(5):12-14.
[5] Liu Miao, Ning Kai, Kong Lingzhou. Design and Application of Cable Crane System for Composite Beam Cable-Stayed Bridge[J]. Highway, 2018(4).
[6] Ning Kai, Gao Quan, Liu Ying. Design and Construction of Lifting Fixture for Lancang River Bridge Composite Beam[J]. Highway, 2018(4).

Authors: Ning Kai, Li Hairui, Liu Ying
(CCCC Second Highway Engineering Co., Ltd., Xi'an 710065)
Source: Automobile Technology & Material, November 2018