Port and Dock Inspection

1. Scope of Inspection

Testing scope includes: the entire wharf and approach bridge sections, all pile caps, structural panels, ship-side components, and auxiliary facilities within the range. Census.

（1) Requirement: Number and locate each component part.

（2) Detailed descriptions of damaged components (such as cracked concrete spalling, exposed reinforcement, fractures, and missing parts) must be provided in written and illustrated formats, along with photographs. The photos should be sequentially numbered, scanned, and printed in color as text attachments, and pasting is strictly prohibited.

（3) The nature of cracks in components must be identified (surface crack, deep crack, or through crack), and a magnifying glass with a ruler must be used to measure the width of the cracks.

（4) Inspections required for the concrete strength of dock components (including core sample strength method and rebound method), depth of concrete carbonation, distribution of reinforcement, and thickness of protective layer, as well as the extent of reinforcement corrosion.

（5) Require investigation of all components for corrosive media.

（6) Select 10% of the total pile count within the inspection range as the low strain pile foundation testing subjects.

（7) Concrete structural durability testing.

（8) Conduct load tests on the dock.

（9) Other

If a structural drawing for the head is required, measurements of the pier structure must be taken and provided:

Measurement of dimensions for various components of the upper structure at the wharf (beams, girders, panels, ship-boarding components, horizontal bracing, etc.), as well as the type and cross-sectional dimensions of pile foundations, pile length, inclination, and twist angle.

② Inspection of the diameter and quantity of the main and stirrup reinforcement bars for each component.

③ Measurement of the reinforcement protective layer thickness.

2. Inspection and Assessment Criteria

"Code for Hydropower Engineering: Specifications for Prototype Observation of Hydraulic Structures (JTS 235-2016)"

"Code for Surveying of Waterway Engineering (JTS 131-2012)"

"Regulation for Foundation Testing and Inspection Technology of Waterway Engineering (JTS 237-2017)"

"Standard for Concrete Structure Integrity Testing Technology for Waterway Engineering (JTS 239-2015)"

"Code for Concrete Test Procedures for Waterway Engineering (JTJ 270-1998)"

"Technical Specifications for Auxiliary Facilities of Ports (JTS 169-2017)"

"Port Civil Engineering Structures Inspection and Evaluation Technical Specification (JTJ 302-2006)"

"Waterway Engineering Quality Inspection Standard (JTS 257-2008)"

"Dock Structure Design Specification (JTS 167-2018)"

"Specification for Foundation Design of Waterway Engineering (JTS 147-2017)"

"Guidelines for Port and Terminal Structure Safety Inspection and Assessment"

3. Testing Methods

（1) Purpose of Inspection

Conduct visual inspections on all hydraulic concrete structures within the detection range to determine the extent and location of damage, providing a reliable basis for analyzing the causes of defects and establishing the correct treatment plan.

（2) Inspection Location Selection

All significant hydraulic concrete structural components at the wharf, including beam systems, structural panels, ship-berthing components, and main auxiliary facilities above the water level of the pile foundations. Damage assessment.

（3) Inspection Instruments and Equipment

1) High-definition digital cameras for on-site photo documentation.

2) Other auxiliary measuring instruments such as steel rulers and measuring tapes.

（4) Inspection Steps

1) Inspectors board the vessel during low tide to access the dock's lower sections, observing the appearance of all components, focusing on concrete spalling, cracking, and other damages. After thorough examination, detailed records are made of the defects' location, nature, severity, appearance, dimensions, and color. Photographs are taken to document the entire inspection area.

2) Describe the distribution of main cracks, measure the length, width, and quantity of cracks, and understand the opening and closing conditions. Generally, the width of cracks along their length is often uneven. In engineering inspections, the focus is on crack width and average crack width.

3) Record the state of exposure to the natural environment—deterioration, flaking, and wear.

4) Document the condition of high-stress areas, noting any concrete crushed sections.

5) Inspect the surface damage of the wharf pile above water level: cracks,破损, dents, deformation, etc.

6) During inspection, carefully check for any loose, broken, or damaged conditions at the connection nodes between the piles and beam system components.

7) Conduct integrity inspections on rubber fender and other auxiliary facilities for mooring piles at the dock.

（5) Port Structure Appearance Degradation Grading Standards

In accordance with the "Technical Specification for Inspection and Evaluation of Port Civil Engineering Structures" of the People's Republic of China's Industrial Standards.The degree of deterioration of the reinforced concrete structure appearance is graded according to the standard (JTJ 302-2006).