How to use displacement observation piles.
The displacement observation pile is a device used to monitor the displacement and deformation of buildings, roads, bridges and other structures. It is usually composed of high-precision measuring instruments and fixed piles, through which the displacement of the pile can be accurately measured, so as to judge the deformation of the structure. Here's how to use the displacement observation pile:
1. Preparation before installation.
Sufficient preparation is required before the installation of displacement observation piles. First of all, it is necessary to understand the structural form, materials, and construction methods of the monitored structure, so as to select the appropriate displacement observation pile type and specification.
Secondly, to determine the location of the observation point, it is generally selected in the key parts of the structure, such as the middle span, support, etc., so as to accurately reflect the deformation of the structure. Finally, it is necessary to conduct on-site surveys to understand the site conditions and determine the installation location and foundation treatment plan of the observation piles.
Second, the installation process.
The installation process of the displacement observation pile generally includes the following steps:
1.Foundation treatment: According to the actual situation of the site, the foundation of the observation pile is treated, such as tamping, cushioning, etc., to ensure the stability and accuracy of the observation pile.
2.Installation of measuring instruments: According to the type and specifications of the selected displacement observation pile, install the corresponding measuring instruments, such as total station, electronic level, etc.
3.Installation of observation piles: Installation of observation piles in a determined position to ensure their stability and verticality. If desired, it can be fixed using materials such as concrete.
4.Adjust the measuring instrument: Adjust the position and angle of the measuring instrument so that the displacement of the observation pile can be accurately measured.
5.Initial value measurement: After the installation of the observation pile, the initial value measurement is carried out immediately to obtain the initial position and deformation of the structure.
3. Precautions for use.
In the process of using displacement observation piles, the following points need to be noted:
1.Periodic inspection: Displacement observation piles need to be inspected and maintained regularly to ensure their accuracy and reliability. Generally speaking, the detection period of the observation pile should not exceed one month.
2.Data logging: At each measurement, the observation data needs to be recorded in detail, analyzed and processed. If the data is found to be abnormal or deformed beyond the allowable value, measures should be taken to deal with it in time.
3.Protect the measuring instruments and observation piles: The measuring instruments and observation piles of the displacement observation piles are high-precision and high-value equipment, which need to be properly kept and maintained. Collision, wear and tear should be avoided during use.
4.Pay attention to safety: During the observation process, pay attention to safety issues. Especially when observing at heights, you should wear safety belts, helmets and other protective equipment to ensure personal safety. At the same time, it is necessary to comply with the relevant national safety laws, regulations and standards.
4. Data processing and analysis.
The processing and analysis of the measurement data of the displacement observation pile is the key link to obtain the deformation of the structure. Data processing mainly includes data filtering, denoising, fitting and other steps to eliminate the influence of errors and outliers. Data analysis is to statistically, compare and study the processed data to determine the displacement and deformation law and trend of the structure.
According to the analysis results, the safety status and stability of the structure can be judged, which provides an important basis for project maintenance and management. At the same time, through the analysis of displacement observation data, the dynamic characteristics and response of the structure can be further studied. Therefore, data processing and analysis is one of the important links in the use of displacement observation piles.
To sum up, the use of displacement observation piles includes the preparation before installation, the installation process, the precautions for use, and the data processing and analysis. In the process of use, it is necessary to pay attention to details and standardize operations to ensure the accuracy and reliability of the observation data. Through the use of displacement observation piles, it can provide important support and guarantee for the health monitoring and maintenance of engineering structures.