Large scale production of settlement observation points for Heyuan observation markers

Description :

　　Large scale production of settlement observation points for Heyuan observation markers

　　The time interval for observing changes is also known as the selection of the period for settlement observation. Through practice, it has been found that if the observation interval is chosen appropriately, it can reflect the settlement and deformation laws of buildings in more detail. Therefore, this type of settlement observation has strict limitations on the selection of time. It is necessary to ensure that the observation must be carried out on time when the foundation has already borne a small amount of load and the load is limited. Otherwise, the initial data obtained from settlement observation will be incomplete or incomplete, resulting in incomplete observation results and inability to reflect in detail the deformation of the foundation during the increase of the load. The measurement work in other stages must be carried out at regular intervals according to the progress of the project, without missing or supplementing measurements. Only in this way can accurate settlement conditions or patterns be obtained, and a better understanding of the stability of the building be gained. Generally speaking, buildings built on sandy soil layers are considered to have completed most of their settlement and rebound during the construction process, while buildings built on clay soil layers only have a portion of their settlement during the construction period. After topping out or completion, a certain number of observations are still required, but the observation period should be extended, that is, the period has changed. Based on work experience, during the construction phase, the frequency of observation should be higher, and the observation period should be determined according to the increase in the number of layers or the increase in load. Whether the settlement has entered a stable stage should be determined by the relationship curve between settlement amount and time. For this type of observation in general engineering, if the settlement velocity is less than a specific value, such as less than 0.01-0.04 mm/d, it can be considered to have entered the stable stage, and the specific value should be determined based on the compressibility of the foundation soil in each region. (3) It is necessary to mention the accuracy of settlement observation. Generally, it is implemented according to the requirements of national second-class leveling measurement.

　　Recently, conservation workers from the Municipal Forestry Bureau and forest law enforcement officers discovered nearly 300 nationally protected animal species, the Great Bustard, gathered near the west bank of Changjian River.

　　In recent years, with the continuous increase of ecological environment protection efforts in our city, the ecological environment of mountainous rivers and other areas has been increasingly optimized. This also attracts birds such as white and bustard to come here for wintering. Recently, staff from forestry, public security and other departments in our city discovered a large group of national first-class protected animals, the Great Bustard, in the distance during routine inspections of an open area on the west bank of Changjian River.

　　Reporter: How many of these can there be?

　　Ren Climbing, a staff member of the Protection Unit of the Municipal Forestry Bureau: There may be more than 100 of them.

　　Subsequently, forestry and public security forest staff in the city carefully observed the rise and fall, foraging, and quantity of this group of bustards through high-definition equipment such as telescopes, inspection mirrors, and cameras.

　　Meng Lei, a staff member of the Protection Department of the Municipal Forestry Bureau, said that groups of bustards have been found to inhabit and forage here, which indicates that the ecological environment of Huayin City has made significant improvements.

　　After staying and inhabiting in the field for an hour, these more than 100 bustards flew about 3 kilometers northeast and gathered with another group of bustards there.

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• River source observation target