Xuzhou observation point price Lianyungang observation standard manufacturer

Description :

　　Based on work experience, during the construction phase, the frequency of observation should be higher. Generally, the observation period is determined by 3 days, 7 days, or 15 days, or by increasing the number of layers and loads. The specific observation period should depend on the foundation and loading during the construction process. When temporarily suspended,

　　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.

　　At the end of each year, the topic of winter storage emerges, and it is also a topic that steel traders and enterprises cannot do without during the traditional off-season of demand. Supply and demand, as well as price, are the key factors determining whether winter storage is possible. From a supply perspective, under the background of "dual carbon" (carbon peak and carbon neutrality), the implementation of regional production restrictions in autumn and winter will be stricter, and the northern Beijing area will also be affected. Atmospheric protection measures will have a stronger constraint on the release of regional production. Therefore, it is expected that in the next four months of winter storage (December 2021 to March 2022), the monthly crude steel production in China may remain below 2.2 million tons, and the supply side is expected to reduce significantly. From a demand perspective, it is an undeniable fact that downstream procurement demand will gradually decrease after entering winter, especially in the northern region where demand will be significantly affected, while demand in the southern region will still maintain a certain level of resilience. Since the third quarter of this year, the continuous acceleration of local bond issuance and the reasonable acceleration of the real estate industry will accelerate the progress of existing project construction and new project commencement, thereby improving the demand for construction steel. However, the effect of funding may be delayed until the second quarter of next year. From a price perspective, the relatively high cost of raw materials still provides significant support, and the significant increase in electricity costs should also be taken into account to support production costs.

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