Guangdong Huanda Engineering Inspection Co., Ltd.

Guangdong Huanda Engineering Inspection Co., Ltd. (English: Guangdong Huanda Engineering Inspection CO.,LTD) (formerly known as Guangzhou Huanda Road and Bridge Technology Co., Ltd.) (hereinafter referred to as "the Company") was established in November 2011, and first passed the provincial metrology certification review in December 2012 and obtained the "CMA Metrology Certification Certificate". The Company has a young, knowledgeable, and professional high-quality technical team. After years of construction and cultivation, it has developed into a professional inspection and testing institution with mature scale, strong testing capabilities, and high technical level. The Company has multiple departments including the Chief Engineer Office, Quality Assurance Department, Comprehensive Department, Foundation Department, Structural Department, Materials Department, Monitoring Department, and Marketing Department, and all inspection personnel are certified for their positions. The Company has independently procured bridge inspection vehicles and multiple sets of testing instruments and equipment that meet the corresponding qualifications, and all instruments and equipment are ensured to meet the requirements of traceability of measurement, and are sent to legal metrology institutions for verification or calibration. The Company has established a complete documented quality system in strict accordance with the requirements of "Assessment of Qualification Ability of Inspection and Testing Institutions - General Requirements for Inspection and Testing Institutions" (RB/T 214-2017). All work is strictly implemented in accordance with the quality system documents, and the quality system documents are continuously improved during work, while maintaining the continuous effectiveness of the quality system documents. All employees of the Company adhere to the concept of "Quality First, Service Supreme" and are dedicated to providing objective and fair engineering testing services to all sectors of society and customers! 1.2 Business Scope 1) Bridge structure (inspection, monitoring): stress (strain), deformation, cracks, frequency, damping ratio, vibration mode, dynamic strain, dynamic deflection, impact coefficient, cable force, acceleration, bearing capacity, technical condition, crack width (depth), elevation, displacement, bridge alignment, cement concrete strength, temperature, wind speed. 2) Concrete main structure and components: appearance and dimensions of components, strength, carbonation depth, apparent and internal defects, reinforcement position and protective layer thickness, reinforcement corrosion potential, concrete resistivity, chloride ion content, pull-out test of post-installed anchors. 3) Foundation and foundation: high strain method, low strain method, sonic transmission method, core drilling method, single pile vertical (compression, vertical, horizontal) static load test, plate load test, anchor rod pull-out, etc. 4) Steel structure: ultrasonic testing of weld quality, magnetic particle testing of weld quality, thickness of fireproof coating for steel structure, thickness of anti-corrosion coating for steel structure, geometric dimensions of steel structure components, coating adhesion, torque coefficient of high-strength bolt connection pairs and final tightening torque value. 5) Engineering monitoring and measurement: monitoring of foundation pits and surrounding affected areas, operational monitoring of urban rail transit structures, monitoring of tunnels and other underground spaces and surrounding affected areas, monitoring of tall formwork support systems, geotechnical engineering investigation, etc. 6) Traffic engineering and construction engineering materials witness sampling testing: soil, admixtures, rock, engineering water, inorganic binder stabilized materials, mechanical connection joints, cement, cement concrete, asphalt, asphalt mixture, concrete, concrete admixtures, mineral powder, slag powder, mortar, fly ash, coarse aggregate, fine aggregate, steel, steel bar welded joints, etc.