Joint measurement of settlement observation elevation is an important step to ensure the accuracy of settlement observation data of buildings or structures. The following is the method and process of joint measurement of settlement observation elevation:
1.Determine the observation point: According to the engineering requirements and geological conditions, set up the settlement observation point at the key position of the building or structure. The observation points should be representative and reflect the settlement changes of the building.
2.Establish datum point: Outside the area affected by the settlement, select a stable area to set the datum point. The reference point is the reference point for settlement observation, which should have long-term stability and reliability.
3.Joint measurement method: The leveling method or triangulation elevation measurement method is used to jointly measure the settlement observation point and the datum point. Leveling is to measure the height difference between two points with a level, and triangulation is to measure the height difference between two points with a total station or theodolite.
4.Measurement period: Determine a reasonable measurement period according to the needs of the project and the change of settlement. In the stage of large settlement changes, the measurement frequency should be appropriately increased in order to grasp the settlement situation in time.
5.Data processing and analysis: collation, calculation and analysis of the measured data to obtain information such as the settlement amount, settlement rate and settlement curve of the building or structure. Based on the results of the analysis, the safety of the building or structure is evaluated, and corresponding treatment measures and recommendations are proposed.
6.Report preparation: compile the process, method, data and analysis results of the settlement observation elevation joint measurement into a report, and archive it for the record. The report should include the layout of the settlement observation points, the joint measurement data table, the settlement curve and the conclusion.
Through the above methods and processes, the joint measurement of settlement observation elevation can be effectively carried out, which provides a reliable basis for the safety assessment and engineering acceptance of buildings.