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Concrete surround is generally adopted for rigid drainage pipes to resist high traffic loads (for instance under shallow covers) and to allow for using pipes with lower strength. Furthermore the use of concrete surround can minimize settlement of adjacent structures. Additionally the highest possible accuracy in levels and gradient can be achieved by using concrete surround as considerable settlement is expected in other categories of beddings such as granular bedding.
The distribution of reinforcement in concrete pipes can't be uniform due to the occurrence of tensile stresses in different locations around the circumference of pipes. For illustration tensile stresses are highest at the inner face of pipes at invert and crown levels and at outer face of two sides of pipes. An elliptical cage can be designed in order to optimize the usage of steel reinforcement.
Fig: Concrete surround of drains
Q. What is Sedimentation tank ? This is a process in which the water is passed through bases or tanks in which the velocity of water is so reduced or water is given a period of
Q. What do you mean by River Gauging? Due to certain behavior of rivers the problem of gauging then is quit complex. The purpose of river gauging is to stabilize the river chan
Explain briefly physical classifications of stone
Example: Convert the following reduced bearings into whole circle bearings: (i) N 65° E (ii) S 43° 15′ E (iii) S 52° 30′ W (iv)
A County is planning to build a new roadway connector in the rapidly developing area of the county. The road can be built at a reduced capacity now for $30 million and can be widen
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A moist soil sample compacted into a mould of 1000 cm 3 capacity and weight 35 N, weighs 53.5 N with the mould. A representative sample of soil taken from it has an initial weight
Absolute pressure is simply the addition of the observed gage pressure plus the value of the local atmospheric pressure.
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