With the accelerated development of public construction in major cities
The workload of tunnel excavation, inspection and maintenance has obviously increased.
In addition, the tunnel structure is complex and opaque.
Tunnel monitoring and survey work is under intense pressure.
Explore the scientific exploration method of tunnel to meet the needs of society
Do a good job in tunnel construction and operation.
It is an important guarantee for people's livelihood and normal economic development.
Traditional tunnel survey methods, such as total station and profiler, take up too much construction time, have low monitoring efficiency and single data results, which require the cooperation of a large number of technicians and consume a lot of manpower and material resources.
The appearance of three-dimensional laser scanning technology has improved the efficiency and quality of tunnel engineering survey.
Three-dimensional laser scanning technology is widely used in the field of tunnel construction engineering because of its advantages of continuous, automatic and rapid acquisition of a large number of complete three-dimensional point cloud data on the target surface and non-contact data acquisition.
Three-dimensional laser scanning technology belongs to high technology.
Since its application in the field of tunnel survey
Not only ensures the construction safety and progress
But also can avoid many unstable factors and diseases in time.
All-round and whole-process tunnel engineering quality inspection and measurement are realized.
Application of three-dimensional laser scanning technology in tunnel
Tunnel construction stage
Tunnel excavation is the most critical step in tunnel construction. However, the calculation of excavation earthwork, accurately calculating whether a certain section of the tunnel is under-excavated or over-excavated, not only directly affects the quality of on-site construction, but also is inseparable from the economic benefits of the construction unit.
Through three-dimensional laser scanning technology, high-precision data acquisition and data information acquisition are carried out for the whole tunnel, which provides controllable information support for tunnel engineering construction. Through the processing and analysis of accurate data, the monitoring accuracy of the tunnel can be effectively guaranteed, and the tunnel over-excavation and under-excavation can be ensured smoothly.
Tunnel detection and protection
In daily operation, tunnels are prone to deformation, cross-section, cracks, water seepage and other phenomena due to soil erosion, building corrosion, oxidation and other reasons, which threaten the stability of tunnels and the safety of social personnel. Therefore, the daily inspection and maintenance of the tunnel is very important.
The three-dimensional laser scanning technology is used to monitor the tunnel safety, and the collected point cloud data are registered, denoised and simplified, and then the three-dimensional modeling is carried out by using related software. By comparing the position difference of the same section on the two-stage reconstruction model, the hidden dangers of tunnel safety can be analyzed and eliminated in time.
Three-dimensional data application
Based on the tunnel point cloud data obtained by three-dimensional laser scanner, depth analysis and mining can be carried out in different scenes. For example, digital archiving or BIM modeling.
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The flexible application of three-dimensional tunnel data can promote the improvement of engineering construction quality and the maximization of social benefits, and at the same time, it has very practical auxiliary significance for the exploration of future engineering technology.
Recommended tunnel survey equipment-Faro Focus S plus 350
With an intuitive touch screen and compact design, the Faro Focus S plus 350 is as easy to operate as a digital camera, and has built-in anti-fouling, dust-proof, fog-proof, rain-proof and heat/cold-proof functions.
Scanning range: 350 meters
Sight distance: 500,000 points/second at 6 14m; 654.38+00,000 points/second at 307 meters; /kloc-2 million points/second at 0/53m.
Measuring speed: max. 2 million points per second.
Ranging error: 1 mm
Resolution: color1650,000 pixels
Multifunctional Faroe focus S plus 350
The collected 3D data can be used for quality control during mining planning.
Accurate positioning of concrete, columns and other components;
Surface flatness analysis and health and safety compliance;
All project partners can access the same reliable data to achieve close cooperation, thus further reducing the risk of mistakes and rework;
Updating the design data with the scanned site information can ensure that the final handed-over documents meet today's strict accuracy requirements, and finally build a qualified engineering building.
Three-dimensional laser scanning technology provides new methods and means for tunnel data measurement, and also promotes the development of spatial three-dimensional data acquisition in the direction of real-time, dynamic, integrated, digital and intelligent.