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Q. Segmentally lined and Sprayed Concrete Linings tunnels?
The fundamental difference between segmentally lined tunnels and SCL tunnels is that the sprayed concrete in SCL tunnel is employed for temporary linings only. Concrete linings in segmentally lined tunnels are designed with long-term load conditions with adoption of appropriate safety factors. Though the dimension of linings in SCL tunnels is derived from a balance between safety of lining and cost consideration.
The quality of precast concrete linings can be better controlled in precasting yards. It is obviously better than that of sprayed concrete which depends on site workmanship.
Discuss about the fibre reinforced concrete Tensile strength of concrete may be improved by using a higher grade of concrete or by using special concretes such as fibre reinfor
Explain the Equation for Length of Spiral Curve Length of Spiral Curve can be calculated using the following equation L s = 3.15V 3 /RC Where: V - Design Speed in MPH
Q. Granular fill or rock fill essential at the base of concrete retaining walls? It isn't uncommon that rock fill layers and granular fill layers are placed beneath the bottom
Classification Based on Grading: IS 883-1970 classifies the structural timber into 3 grades-select grade, grade I and grade II. The classification is depend on, defects, permi
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Design for the limit state of collapse in bending Following assumptions are taken in the design for the limit state of collapse in bending or flexure. Plane sections norm
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Q. Explain about Noise absorptive materials? The fundamental mechanism of noise absorptive material is to change the acoustic energy into heat energy. Amount of heat produced i
Ductile iron pipes vs. mild steel pipes as pressurized pipelines For water main pipe size less than 600mm, ductile iron is generally used since internal welding for steel pipe
State the method of Pre- Tensioning It is a method of prestressing concrete in which tendons are stretched or tensioned before concreting. In this form of construction, concr
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