In This Article We Covers Fore Poling Method Of Tunneling In Soft Ground.
FACTOR AFFECTING THE CHOICE OF A METHOD
- SIZE OF TUNNEL
- TYPE OF GROUND
- AVAILABLE EQUIPMENT
- METHOD OF SEQUENCE OF EXCAVATION
FORE POLING METHOD OF TUNNELING
This Is Probably The Only System Which Could Advocated For Running Ground And Similar Soils, Now Replace By Compressed Air Tunneling Method.
In Fore Poling Method The Process Is Slow And Required Skilled Labors.
Tunnels Of Small Dimensions For Laying Sewers, Gas Pipes Etc At Ordinary Depth Advantageously Constructed By This Method.
SEQUENCE OF OPERATIONS FOR 1.52X1.52MTR
- Sinking Of Shaft
- Bent Placed From The Sheeting
- Holes Driven In The Sheeting From 7.5 C/C Above The Cap And Below The Cap.
- Fore Pole Consist Of Plank With Wedge Ends Entered One At A Time
- Driven Through Half Length At 15 Cm/M Inclination
- Timber Laid At The End Of All Splices.
- Face Shutting Broken Out And Ground Allowed To Run.
- Put Temporary Supports At End Called Hoarse Head.
- The Other End Of Fore pole Supported With Board Of Size 45 Cm.
- Now, Repeat The Procedure And Inserted Boom For The Support Of Board.
ADVANTAGES OF FORE POLING METHOD
Used Without Compressed Air.
Used For Small Dimensions In Running Ground.
DISADVANTAGES OF FORE POLING METHOD
Slow Process In Fore Poling Method.
Used Only For Small Cross Section.
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Author & Editor Of This Blog.
Founder Of “KPSTRUCTURES”
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