Differences between open shield and closed shield, Civil Engineering

Assignment Help:

Q. Differences between open shield and closed shield?

Open shield type TBM refers to those providing lateral support only. They can be further classified into single shield and double shield.  

Closed shield type TBM refers to those providing lateral support and frontal support. Some common TBM method under this category includes compressed air TBM, slurry shield TBM, earth pressure balance machine and mixed confinement shield. 

Compressed air TBM is suitable for cohesive soils under water table (e.g. ground with low permeability with no major discontinuities). Slurry shield TBM is suitable for soft ground and soft rock under water table and also for ground for high permeability. Earth pressure balance machine is suitable for soft ground and soft rock under water table. It is not recommended for very abrasive and hard ground.


Related Discussions:- Differences between open shield and closed shield

How to do deflection calculations, How to do deflection calculations Ba...

How to do deflection calculations Basic values of span to effective depth ratios for spans upto 10m may be taken as 7, 20 and 26 for cantilever, simply supported and continuous

Seismic joints, is the seismic joints like falling joints ? thanks :)

is the seismic joints like falling joints ? thanks :)

Define the marine growth - underwater inspection of bridges, Define the Mar...

Define the Marine Growth - Underwater inspection of bridges? Bridges on many inland waterways are relatively clean and free of marine growth. However, there is likelihood of ma

Survey, who to we calculate the RL at first point.

who to we calculate the RL at first point.

Human values, give the two aspects of honesty& explain

give the two aspects of honesty& explain

Hydrolic, how can i caculate volicity and tank capacity ?

how can i caculate volicity and tank capacity ?

Define corrosion - deterioration of steel structures, Define Corrosion - De...

Define Corrosion - Deterioration of Steel Structures? Corrosion is the principle cause of deterioration of steel structures. Corrosion of steel is an electrochemical process th

Explain the permissible settlement, Q. Explain the Permissible Settlement? ...

Q. Explain the Permissible Settlement? Any foundation may fail in shear or by excessive settlement. The failure due to shear is checked by adopting safe value of bearing capa

Determine the ultimate bearing capacity of a square footing, Determine the ...

Determine the ultimate bearing capacity of a square footing, 1 m × 1 m, resting on saturated clay of unconfined compression strength of 180 kN/m 3 and a bulk density of 18 kN/m 3

Rcc structure, neea BM & SF CALCULATIONS & DWNGS

neea BM & SF CALCULATIONS & DWNGS

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd