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Pre-tensioning systems
In the previous unit we have seen different steps in a pretensioning operation. Tendon wires or strands (formed as a rope type arrangement made of several tendon wires) are stretched and concrete is cast in the moulds, as shown in Figure. When sufficient strength is gained by concrete due to hardening, tendon wires may be cut from outside and jacks may be removed.
Define the Coefficient of Permeability: (K) A measurement of the ability of the soil or an aquifer for the movement of water through it. Also termed "hydraulic conductivity", C
Surface runoff travelling over ground surface to reach receiving water involves the following events: i) Rainfall intensity exceeds soil's infiltration rate; ii) Excess water
Define Latitude - Transportation Latitude of a line is the distance that the line extends in a north or south direction. A line that runs towards north has positive latitude; a
design
What is foundation?
Q. How can a temporary diversion to laid a cross flowing river in case of disruption to rail traffic over a major bridge lasting over 6 months. Ans.- Temporary diversion
Penetration Test: A viscosity is measured indirectly by the penetration of a standard needle under standard conditions of load, time and temperature. The test measures the ha
Q. Method of construction of a bored cast-in-situ concrete pile? Ans. - Bored cast-in-situ concrete pile - A guide casing of 3 to 4 m length is provided on top of the bore hole
Temporary bench marks
Example: The following fore bearings were observed respectively for lines, AB, BC, CD, DE, EF and FG. Find out their back bearings: (i) 148° (ii
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