Ankang Observation Standard Manufacturer L-shaped Observation Nail Straight Observation Pile Processing Customization

Description :

　　Ankang Observation Standard Manufacturer L-shaped Observation Nail Straight Observation Pile Processing Customization

　　The content of settlement observation records includes: the project name, different observation dates, and records of the elevation and gradual settlement of each observation point measured based on benchmark points under different project states. The instruments and methods for settlement observation should use precision leveling instruments and copper water level rulers. In the absence of these instruments, precision engineering leveling instruments (with matching levels) and calibrated leveling instruments can also be used for settlement observation. Fixed measuring tools should be used for observation, and personnel should also be fixed. Each observation must be checked on site using a circular closure method or a reciprocating closure method. The difference between two observations at the same observation point shall not exceed 1mm, and the leveling measurement shall be carried out using the closed method. The use of second-order leveling measurement should comply with

　　Requirement for (mm); The use of third-order leveling measurement should comply with

　　Requirement for (mm). The number and time of settlement observations (n is the number of times the level is installed during the leveling measurement process) should be in accordance with the design requirements. Generally, the number and time of settlement observations should be carried out in a timely manner after the observation points are securely installed. Civil buildings should be observed once every additional floor, while industrial buildings should be observed separately at different load stages; The settlement observation conducted by the construction unit during the construction period shall not be less than 4 times. The observation frequency after the completion of all buildings and structures is 4 times per year, 2 times per year in the second year, and 1 time per year after the third year, until the settlement stabilizes (determined by the relationship curve between settlement and time). The observation period is generally 2 years for sandy soil foundation, 5 years for cohesive soil foundation, and 10 years for soft soil foundation. When buildings and structures suddenly experience significant settlement, uneven settlement, or severe cracks, continuous observations should be conducted daily or every few days, and cracks should also be observed. For the observation of cracks in buildings, reliable observation markers (such as gypsum strips, etc.) should be set up on the cracks. After observation, detailed drawings should be drawn to indicate the location, shape, and size of the cracks, and the date and number should be indicated. If necessary, take photos of cracks. The crack width can be observed with a magnifying glass. The engineering status is marked by a certain floor (or elevation) for general civil buildings; Industrial buildings are marked with different load stages as status indicators. For each settlement observation, the settlement amount and cumulative settlement amount between adjacent observation points should be checked. If the settlement is too large or uneven, measures should be taken in a timely manner. The numbering of each observation point in the column for other observation points should be consistent with the numbering in the settlement observation diagram.

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