Customized protection box for Shantou observation marker observation pile

Description :

　　Customized protection box for Shantou observation marker observation pile

　　How to plan the descending observation mark and observation period? When using the settlement observation mark, the first observation pile should first find the settlement observation point, which should be set up stably and properly protected to prevent damage during the construction process. Settlement observation points should generally be located at the following positions:

　　On both sides of the intersection of high and low rise buildings, old and new buildings, and vertical and horizontal walls; 2. Set points on each or part of the column foundation of the frame structure building or along the longitudinal and transverse axes; 3. At the four corners, major corners, and 10-15 meters along the exterior wall of the building, or on every 2-3 column foundations; 4. On both sides of building cracks and settlement joints, at locations where there is a significant difference in foundation burial depth, at the boundary between artificial and natural foundations, at the boundary between different structures, and at the boundary between filling and excavation; 5. At the four corners and middle positions of raft foundation, box foundation bottom plate or structural parts close to the foundation; 6. For buildings with a width greater than or equal to 15m and complex geology or expansive soil areas, interior wall points shall be set in the middle of the load-bearing interior partition wall, and ground points shall be set in the center and surrounding areas of the indoor floor; 7. Adjacent stacking of heavy objects, vibration foundations, heavy equipment and power equipment foundations, etc

　　Accuracy requirements: The editor selects the level of settlement observation accuracy based on the characteristics of the building and the requirements of the construction and design units. In the general construction process of high-rise buildings without special requirements, the observation method of second-order leveling measurement can meet the requirements of settlement observation. The requirements for various observation indicators are as follows: round-trip deviation, convergence or loop closure deviation: n represents the number of measurement stations; Secondly, the front and rear line of sight should be ≤ 30m; thirdly, the difference in front and rear line of sight should be ≤ 1.0m; fourthly, the cumulative difference in front and rear line of sight should be ≤ 3.0m; fifthly, the height difference tolerance of the settlement observation point relative to the rear line of sight should be ≤ 1.0mm. Due to the concentrated holiday and weakened demand in downstream markets, after the market opened today, the main contract prices fell one after another, and the bearish sentiment in the short to medium term market surged. Among them, the price of coke fell by 5.86%. In addition to weakened demand, there is also the impact of Indonesia resuming coal exports and lowering prices. Overall, the market entered a period of "box consolidation" and "flag consolidation" from mid November after experiencing a sharp decline.

　　Analyst's opinion: Due to higher prices than the same period in previous years, the market is not actively purchasing goods, and with the approaching Spring Festival, the supply and demand of black series are weak, and there is no obvious breakthrough trend. It is expected that this trend will continue until after the year, and the recovery of demand will drive a new round of upward momentum. In the short term, it is currently in the upper position of the consolidation range, with significant upward pressure and weak short-term operation.

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• Shantou Observation Standard