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What are the test sites for tunnel engineering?
2022-07-06 06:00:00 【Fate】
After a whole day of study , The examination site of tunnel engineering is finally clear , Give yourself a compliment What are the test sites for Tunnel Engineering ?
See the picture ↓
below , Specifically speaking .
1. Nine geological backgrounds
See the picture ↓
1.1 Water rich weak surrounding rock
1.2 Karst
1.3 Aeolian sand and water bearing sand layer
The examination site is relatively simple , The exam is unlikely , No memory .
1.4 Gas tunnel
1.5 Rockburst
1.6 Extruded surrounding rock
1.7 Expansive rock
1.8 Loess
Mainly waterproof 、 Drainage and precipitation , Adopt three steps reserved core soil method for construction
1.9 Plateau frozen soil
2. Advance geological prediction
2.1 Purpose and content
2.2 Method
2.3 Procedure and division of labor
3. Monitoring measurement
3.1 Surrounding rock classification
3.2 Monitoring measurement purpose
3.3 Necessary items and distribution principles
3.4 Monitoring frequency
3.5 Management countermeasures
4. Three principles for entering the hole
5. Excavation of main hole
5.1 Excavation method
5.2 Drilling and blasting excavation
5.2.1 Blast hole depth and charging method
5.2.2 Detonation sequence
5.2.3 Excavation method
6. Safe step
7. Support
8. Ventilation and slag discharge
Ventilation and slag discharge are related to the length of the tunnel
8.1 ventilation
There are two ventilation methods for gas tunnels :
Press in type Roadway type ( The tunnel length is greater than 2000m)
8.2 dustproof
8.2 Slag out
The gas tunnel is transported by rail
9. Waterproof and drainage
10. Existing tunnel
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