Installation of settlement observation points by Bengbu observation marker manufacturers and pricing of observation markers

Description :

　　The commonly used forms of settlement observation markers include concealed bolt type, L-shaped, quick insertion type, etc;

　　Object of settlement observation

　　1. Buildings designed for foundation design

　　2. Building expansion and adding floors

　　3. Buildings are affected by excavation of foundation pits and surrounding deep foundation pits, or by changes in environmental factors such as underground water

　　4. Buildings with a design grade of Class B on composite foundations or weak foundations

　　5. Projects that require accumulating construction experience or conducting reverse analysis design

　　Installation of settlement observation points by Bengbu observation marker manufacturers and pricing of observation markers

　　2、 Layout of settlement observation points

　　Settlement observation points should be set up at locations that can comprehensively reflect the deformation characteristics of the building foundation, generally at the four corners of the building, at corners, and every 10-15 meters along the outer wall; Different foundation burial depths, load distributions, new and old buildings, different geological conditions, different upper structures, different foundation types, high and low rise buildings, settlement joints, and both sides of building cracks; At the four corners and middle positions of raft foundation and box foundation; At the interior longitudinal walls of buildings with a width greater than or equal to 15 meters, or less than 15 meters but with complex geological conditions, as well as at the floors, elevator shafts, and central shafts of frame, frame shear, frame tube, and tube in tube structural systems; Adjacent column bases where the frame structure may experience significant uneven settlement; The ends of high-rise buildings correspond to both horizontal and vertical directions; The longitudinal walls of a multi story masonry building are spaced 6-10 meters apart from each other at the corresponding end of the transverse wall.

　　Place at least 4 measuring points symmetrically along the perimeter or foundation axis of various structures.

　　The observation reference point should be set outside the influence range of the foundation pit engineering, generally not less than 30-50 meters, and the number should not be less than two.

　　The layout of observation points is an important part of settlement observation work, which directly affects whether the observation data can truly reflect the overall settlement trend and local settlement characteristics of the building.

　　3、 Accuracy requirements for settlement deformation monitoring

　　The measurement accuracy level of settlement observation adopts Level II leveling measurement. The general line of sight length should be 20-30 meters, and the line of sight height should not be less than 0.5 meters. The closed method should be used to eliminate errors.

　　In recent times, production restrictions in northern regions have tightened again, and measures to prevent and control air pollution may be implemented frequently. Coupled with the continued poor demand for downstream steel, this will have a negative impact on mineral prices; At present, the profits of steel mills have significantly shrunk. Considering costs, steel mills may adjust their procurement varieties, increase the amount of low-grade powder ore, and put pressure on high-grade ore; The pattern of oversupply of iron ore fundamentals remains unchanged, and iron ore inventories continue to accumulate; Although there has been a temporary decrease in mining shipments recently, the overall volume has not changed much; National policies may continue to cause disturbances in mineral prices. The market game is obvious, and the imported mineral market may mainly experience wide fluctuations and weak operations, and it cannot be ruled out that there will be small fluctuations in the later stages.

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