TUNNELING based on soil typeI. Soft soil which requires TEMPORARY support during and after construction.II. Hard rocks (or) fully self-supporting soilSoft Soil Classification:Firm-groundThe roof can withstand without support for few minutes.Walls can withstand for 1-2 hrs after excavation.Eg. DRY earth, firm clay and cemented sand, etc.Running groundNeeds INSTANT support during excavation. Eg. Dry sand, gravel, and silt, etc.Self-supporting groundThe GROUND can stand unsupported while excavation was done for 1.5 to 5 m.Eg. Sandstone, hard clay, etc.Soft groundThe roof needs instant support after excavation.Walls can withstand without support only for few minutes. Eg. Soft earth, clay, and damp

"> TUNNELING based on soil typeI. Soft soil which requires TEMPORARY support during and after construction.II. Hard rocks (or) fully self-supporting soilSoft Soil Classification:Firm-groundThe roof can withstand without support for few minutes.Walls can withstand for 1-2 hrs after excavation.Eg. DRY earth, firm clay and cemented sand, etc.Running groundNeeds INSTANT support during excavation. Eg. Dry sand, gravel, and silt, etc.Self-supporting groundThe GROUND can stand unsupported while excavation was done for 1.5 to 5 m.Eg. Sandstone, hard clay, etc.Soft groundThe roof needs instant support after excavation.Walls can withstand without support only for few minutes. Eg. Soft earth, clay, and damp

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Match the following:List-1 List-2 A. Firm ground 1. Needing instant support all round B. Running ground 2. Needing instant support for the roof C. Self-supporting ground 3. No need for instant support for the roof D. Soft ground 4. Soil stands support for short period and short length

Highway Engineering Traffic Engineering Studies Analysis in Highway Engineering 10 months ago

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Concept:Methods of TUNNELING based on soil typeI. Soft soil which requires TEMPORARY support during and after construction.II. Hard rocks (or) fully self-supporting soilSoft Soil Classification:Firm-groundThe roof can withstand without support for few minutes.Walls can withstand for 1-2 hrs after excavation.Eg. DRY earth, firm clay and cemented sand, etc.Running groundNeeds INSTANT support during excavation. Eg. Dry sand, gravel, and silt, etc.Self-supporting groundThe GROUND can stand unsupported while excavation was done for 1.5 to 5 m.Eg. Sandstone, hard clay, etc.Soft groundThe roof needs instant support after excavation.Walls can withstand without support only for few minutes. Eg. Soft earth, clay, and damp

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Posted on 24 Nov 2024, this text provides information on Highway Engineering related to Traffic Engineering Studies Analysis in Highway Engineering. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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