Guangxi settlement board wholesale price 500 settlement board manufacturer quotation

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　　Guangxi settlement board wholesale price 500 settlement board manufacturer quotation

　　Recently, there has been a slight improvement in actual demand. In terms of volume, the average daily trading volume of sample enterprises has rebounded in the past five weeks. In November, the average daily trading volume increased by 1.9% month on month, and the year-on-year decline narrowed from 27.9% in October to 19%. From the inventory perspective, since November, the stock of threaded steel in sample enterprises has decreased by 1.1078 million tons instead of increasing, and the total inventory of the five major varieties has decreased by 1.1286 million tons instead of increasing. Wang Jianhua said that the inventory decline in many places showed that the actual demand was better than expected. From historical consumption data, it can be seen that demand does not decrease significantly month on month in the two months leading up to the Spring Festival each year, and even shows a trend of month on month growth in some years. Considering the special nature of this year, the government has been regulating the real estate industry for some time, and has also emphasized the need to form physical workloads by the end of this year and the beginning of next year, with an expected further rebound in demand. Wang Jianhua believes that steel inventory may continue to decline in mid to early December. In November, the manufacturing PMI (Purchasing Managers' Index) rebounded 0.9 percentage points month on month to 50.1%, returning to the expansion range. The construction business activity index and new order index rebounded 2.2 percentage points and 1.9 percentage points respectively month on month, both in an expanding trend.

　　Frequency and requirements for roadbed settlement observation

　　(1) The foundation piles used for observing displacement and settlement must be placed in a stable foundation that is not affected by the load of fill soil. Effective measures must be taken to protect the foundation piles and displacement observation piles during the observation period.

　　(2) Observation and control standards for filling: The ground settlement rate of the centerline of the embankment shall not exceed 1.0cm per day and night, and the horizontal displacement rate of the slope foot shall not exceed 0.5cm per day and night. If this limit is exceeded, the filling shall be stopped immediately, and the filling shall be carried out after the observation value returns to below the limit value. The filling rate shall be mainly controlled by horizontal displacement.

　　(5) During the observation period, if the measured settlement of the roadbed exceeds the design value by 20% or more, the cause should be promptly identified in conjunction with the construction, survey and design units. If necessary, geological review should be conducted, and calculation parameters should be adjusted based on the measured results. The predicted settlement of the design should be corrected or settlement control measures should be taken.

　　6、 Observation accuracy requirements

　　The measurement accuracy of settlement level is ± 1mm, and the reading position is up to 0.1mm; the measurement accuracy of profile settlement is ± 4mm/30m.

　　7、 Observation technology requirements

　　To achieve the purpose of roadbed settlement observation, establish the relationship between settlement and time, understand the location where settlement occurs, and consider the following requirements for settlement observation.

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　　1) In order to observe the total settlement of each part, settlement observation is carried out immediately starting from the filling of the roadbed.

　　(2) The installation of settlement signs is carried out during the construction process, and the filling construction of the construction unit should be coordinated with the installation of the signs to ensure that they do not interfere or affect each other. The progress of embankment filling should be promptly informed to the personnel responsible for burying settlement plates to avoid missing the opportunity for burial. The installation of observation facilities and settlement observation work should be carried out in accordance with the requirements of this plan, and should not affect the uniformity of the quality of roadbed filling.

　　(3) Under the condition that the installation of settlement plates does not significantly affect the construction, the construction of the roadbed should achieve uniform compaction and consistent quality, so that the settlement observation data has good representativeness.

　　5. Comparison between calculated settlement and observed settlement

　　(1) Due to the many factors that affect settlement calculation, the accuracy of settlement calculation cannot meet the requirements. It is necessary to conduct a systematic comprehensive analysis of settlement observation data to verify and adjust design parameters and measures.

　　(2) Determine the true compression modulus Es of the roadbed through settlement observation, in order to determine the post processing settlement caused by the self weight of the ballastless track structure;

　　(3) If the observed settlement exceeds 20% of the calculated design settlement, after eliminating human errors and equipment failures, the design can be checked as early as possible and measures can be taken to ensure that the post construction settlement meets the design requirements.

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