BAIJIAN - Third party testing organization
2.1 Terminology 2.1.1 Ground borne vibration、 structure vibration in buildings The reciprocating motion of solid media along the line caused by running trains causes vibration of the ground、 building foundation、 or structure. This type of vibration diffused by the track roadbed excites the building foundation in the form of compression waves、 shear waves、 or surface Rayleigh waves in the rock and soil mass. 2.1.2 Secondary noise、 secondary air noise in buildings: The sound pressure wave radiated by the solid surface vibration of a building component that is excited to generate vibration、 also known as solid noise、 to the surrounding air medium. The evaluation index of secondary radiation noise is the equivalent A-sound pressure level. 2.1.3 Background noise in indoor spaces with closed doors and windows、 when there are no trains passing by or affected by the measured vibration source (rail transit)、 and there are no other obvious vibration or noise sources. 2.1.4 Sensitive points: Individual buildings with high requirements for environmental vibration and noise control in a certain area、 as well as special buildings with particularly high requirements for vibration or noise control. 2.1.5 Sensitive areas are areas with high requirements for environmental vibration and noise control
Baijian is committed to providing convenient and efficient testing services for enterprises and individuals、 simplifying testing processes、 improving the efficiency of testing services、 using Internet plus testing e-commerce to provide customers with diversified choices、 fundamentally reducing testing costs、 improving time efficiency、 breaking industry limitations and bottlenecks、 and creating an innovative testing platform in the industry. If you need it、 please contact 18501763637
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific、 fair、 and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsinspection and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered、 meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing、 with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle、 low cost、 and attentive service 7. Possess authoritative qualifications such as CMA、 CNAS、 CAL、 etc 8. The testing report is authoritative and effective、 and is generally used in China