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

Determine the active thrust on the wall, A retaining wall 9 m high retains ...

A retaining wall 9 m high retains granular fill weighing 18 kN/m 3 with level surface. The active thrust on the wall is 180 kN per metre length of the wall. The height of the wall

Brick masonry., an opening of width 3m and height 2.7 in a brick masonary h...

an opening of width 3m and height 2.7 in a brick masonary has to be provided with door cum window. plan, elevation, section and 2 joining details

Quantity calculation for subgrade preparation, reparation of subgrade in sq...

reparation of subgrade in sqm for a road of span 12 km and width 5.25m,with shoulders of 0.75m span on both the sides...considering extrawidening too......plz help...i m preparing

Surveying, Distance ABC was measured with a 30m. Chain tested and found to ...

Distance ABC was measured with a 30m. Chain tested and found to be correct in the beginning of the work .after measuring AB=1.2 km chain was found to be 10 cm. To long chaining was

How to calculate the diameter of the footing, A circular footing rests on a...

A circular footing rests on a pure clay with qu = 270 kN/m 2 , at a depth of 1.8 m. Verify the diameter of the footing if it has to transmit a load of 720 kN. Suppose the bulk u

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