建筑物沉降观测,前视读数,后视读数,前视标高,什么意思及市政测量工作心得!（What do you mean by building subsidence observation, front view reading, back reading, front view elevation And municipal measurement work experience!）.docVIP

建筑物沉降观测,前视读数,后视读数,前视标高,什么意思及市政测量工作心得!（What do you mean by building subsidence observation, front view reading, back reading, front view elevation And municipal measurement work experience!） 1. building subsidence observation, forward reading, back reading, front elevation, what do you mean? In leveling, to measure the elevation of the instrument point, it is necessary to know the elevation of the original point (that is, the starting point of the elevation) The instrument frame, after the first view alignment, because after the point of view of ground elevation, the known ground elevation and instrument reading level ruler reading, is the instrument of elevation, and then on the point to be measured, the view (marks on buildings), because the level of sight is horizontal. So to see the readings and instrument forward-looking point is the same elevation, while the bottom elevation scale is high minus the reading instrument So there are nbsp; front view elevation = instrument elevation - forward reading = rear view elevation + rear view reading - front view degree Settlement observation: if the front view is regarded as the observation point and observed on the given date, the settlement of the front view can be known by comparing the elevation of the observation record. Surveying work is to determine the location and elevation of the design and construction drawings at the scene. Basically, the instruments used are the level of the level and the location of the total station. It is often a master measurement and an assistant performs the task on the spot. First, said the construction side of the elevation, the elevation is put in the setting out of pile position, measure the existing elevation of the corresponding point, and then use the design elevation minus the corresponding point elevation difference is the scene that existing, the elevation. Then, the construction team or construction team shall be responsible for the construction of the elevation difference, a