Shenzhen Observation Standard Spherical Cross Measuring Nail 304 Stainless Steel Observation Standard Wholesale

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　　Shenzhen Observation Standard Spherical Cross Measuring Nail 304 Stainless Steel Observation Standard Wholesale

　　There are various styles of settlement observation markers, such as L-shaped, hook shaped, sign shaped, directly buried, bolt shaped, etc. Regardless of the form, they are generally made in a fixed form during actual construction surveying. For buildings or structures with veneer decoration in the later stage of the building facade, they are often made into embedded bolt shaped or pull-out shaped. These two forms of observation markers are different in observation and non observation, and can be used for observation while protecting the markers.

　　The specific production and selection of building settlement observation markers still depend on the location of the observation points. Observation markers of appropriate forms and specifications can be selected according to actual observation needs. Customization based on drawings is acceptable. Welcome to consult.

　　According to the prepared settlement measurement plan and the determined observation period, observation should be carried out in a timely manner after the observation point is stable. Generally, high-rise buildings have one or several underground structures, and observation should start from the foundation. Settlement observation points (temporary) should be buried at the designed positions on the longitudinal and transverse axes of the foundation (foundation edge). Observation can only be carried out after the temporary observation points are stable. The elevation values of the settlement observation points observed are the basis for comparison in future observations, and their accuracy requirements are very high. N2 level precision leveling instruments are generally used for measurement, and each observation point elevation should be observed twice during the same period. Comparing the observation results, if the height difference between the same observation points does not exceed ± 0.5mm, we can consider the observed data to be reliable. As the structure rises one level, temporary observation points are moved up one level and observed until+0.00, and then observation points are buried according to regulations (for ease of observation, observation points can be set at+500mm). Then, every layer of construction is retested until completion. When conducting settlement observations during the stages of pile driving, excavation of foundation pits, and continuous layering of the upper part after the completion of the foundation, it is necessary to record various factors that affect settlement changes and anomalies, such as the construction progress, increased load capacity, warehouse loading and unloading tonnage, building inclination cracks, etc., for each observation. After weekly observation, the observation data should be promptly organized to calculate the settlement amount, settlement difference, average settlement amount and settlement velocity of the observation point for the current period. If there is an abnormal change in the amount of change, the client should be immediately notified to provide a basis for taking preventive measures, and the number of observations should be appropriately increased. On the other hand, observations of different periods should follow the principle of "five determinations". The so-called "five determinations" refer to the benchmark points, base points, and settlement observation points on the observed object that are commonly used as the basis for settlement observation, and the points should be stable; The instruments and equipment used should be stable; Observers need to be stable; The environmental conditions during observation should be basically consistent; The observation route, mirror position, program, and method should be fixed. The above measures objectively ensure that the subjective uncertainty of observation errors is minimized as much as possible, so that the measured results have a unified tendency; Can ensure the comparability between each retest result and the observation result, making the observed settlement more accurate.

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