The foundation pit is one of the most common construction sites in construction projects and one of the most challenging constructions in civil engineering. Due to the influence of multiple factors such as geological conditions and human factors, foundation pit construction often leads to deformation and damage. Foundation pit displacement monitoring is an important construction link. It can help monitor whether the foundation pit has problems such as slippage and settlement, and take timely measures to ensure the smooth progress of construction.
There are many methods for foundation pit displacement monitoring, among which more common methods are proceed with some highly precise instrument，like total station instrument , laser distance measuring meters, GPS etc.
The following is a detailed introduction to these methods:
1. Total station method
Advantages:
– Real-time monitoring : It can record monitoring data in real time, which is suitable for dynamically changing monitoring needs.
– Wide applicability : It is suitable for monitoring most foundation pits and surrounding buildings.
Disadvantages:
– Complex operation : Professionals are required for operation and data processing.
– Equipment cost : Total station equipment is relatively expensive.
2. Laser distance measuring meters method
Advantages:
– High precision and high efficiency : Laser distance measuring meters can provide high-precision measurement results and have a fast measurement speed.
– Non-contact measurement : It does not require contact with the measured object, which is suitable for measuring inaccessible parts of the foundation pit.
Disadvantages:
– Limited measurement range : The effective range of laser ranging is limited, and long-distance measurement may be restricted.
– Data processing : Special software and technology are required to process measurement data.
3. GPS method
Advantages:
– Automation : Automated data collection and real-time monitoring can be achieved.
Disadvantages:
– Signal interference : GPS signals may be interfered with in places such as high-rise buildings and tunnels in cities.
– Complex data processing: A large amount of data needs to be processed and accurate data corrections performed.
In actual projects, these methods are usually used in combination to give full play to their respective advantages. For example, total station instrument can be used for precise point measurement, laser distance measuring meters can be used for rapid distance measurement, and GPS can be used for large-scale monitoring. This can achieve more comprehensive and accurate foundation pit displacement monitoring to ensure construction safety.
