Suizhou Stainless Steel Observation Standard Galvanization Observation Point Production Plant

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　　Suizhou Stainless Steel Observation Standard Galvanization Observation Point Production Plant

　　The number of observations should depend on the type of foundation soil and the magnitude of settlement rate. Generally, observations are made 3-4 times a year, 2-3 times in the second year, and once a year after the third year until stability is achieved. The observation period is generally stipulated as follows: 2 years for sandy soil foundation, 3 years for expansive soil foundation, 5 years for clay foundation, and 10 years for soft soil foundation. If the settling velocity is less than 0.01 mm/d, according to the settlement

　　Analysis of the descending curve suggests that it has stabilized and observation can be stopped.

　　4. For situations such as sudden increase in load, large accumulation of water around the foundation, and prolonged continuous precipitation, the number of observations should be increased in a timely manner. When a building suddenly experiences significant settlement, uneven settlement, or severe cracks, continuous observations should be conducted daily or every 2-3 days.

　　Kun Jian Xie Zi (2008) No. 11 explicitly states: According to the above requirements and the actual situation in this city, during the construction period, a total of about 3 observations are generally required for multi story buildings (once for the initial value, once for the third floor after construction, and once after the main structure is capped); For industrial plants with less than three floors (including three floors), a total of about 2 measurements are required (initial value once, measured once after the main structure is capped). For industrial plants with more than three floors, measurements are required for every additional two floors, for a total of about 3-4 measurements; For every additional three floors of high-rise buildings, approximately 515 observations are required. If abnormalities are found, the observation frequency should be increased. During the usage phase, the third point mentioned above can be seen.

　　How to bury the signs of settlement observation points on construction sites?

　　1、 The markers for adjacent foundation settlement observation points can be divided into two types: shallow buried markers used for monitoring safety and deep buried markers used for combining scientific research. Shallow buried markers can be made of ordinary level markers or poured on-site with cement pipes with a diameter of 25cm. The burial depth should be 1-2m, and the bottom of the marker should be buried below the freezing line. Deep buried markers can be in the form of inner pipes and protective pipes, and the burial depth should be adapted to the depth of the building foundation. The top of the marker stone should be buried 20-30cm below the ground, and a covered manhole should be built for protection;

　　1、 When observing from the outside of the building, the location of the measuring station should be chosen at a fixed position on the direction line orthogonal to the tilt direction, 1.5 to 2.0 times the height of the aiming target. When using the vertical channel inside the building for observation, the center point at the bottom of the channel can be used as the measuring station;

　　2、 For overall tilt, observation points and fixed points at the bottom should be arranged along the vertical line of the building body corresponding to the measurement station, corresponding to the top and bottom; For layered tilting, it should be arranged according to the corresponding positions above and below the layered parts;

　　3、 The selection of baseline endpoints for measuring stations set up according to the forward intersection method should take into account the requirements of distance measurement or length measurement. The survey stations arranged according to the direction line horizontal angle method should have directional points set up.

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