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Home/ Questions/Q 104
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lidiya thapa
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lidiya thapaBeginner
Asked: December 14, 20212021-12-14T13:02:30+05:45 2021-12-14T13:02:30+05:45In: Civil Engineering

State the basic principle for locating highways and describe the complexities associated with route location process

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engineering surveyhigh alignmenttransportation engineering
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    1. lidiya thapa Beginner
      2021-12-14T13:13:25+05:45Added an answer on December 14, 2021 at 1:13 pm

      The basic requirements of an ideal alignment between two terminal stations are that it should be :

      a) Short

      b) Easy

      c) Safe and

      d) Economical

      Short: It is desirable to have a short (or shortest) alignment between two terminal stations. A straight alignment would be shortest, though there may be several practical consideration which would cause deviations from the shortest path.

      Easy: The alignment should be such that it is easy to construct and maintain the road with minimum problems. Also the alignment should be easy for the operation of vehicles with easy gradients and curves.

      Safe: The alignment should be safe enough for construction and maintenance from the view point of stability of natural hill slopes, embankment and cut the slopes and foundation of embankments. Also it should be safe for the traffic operation with safe geometric features.

      Economical: The road alignment could be considered economical only if the total life cycle cost considering the initial cost, maintenance cost and vehicle operation cost is lowest. All these factors should be given due consideration before working out the economics of each alignment.

      The alignment should be such that it would offer maximum utility by serving maximum population and product.

      Thus in summary it can listed as :

      1.The length of the highway should be shortest and straight as possible.
      2.The proposed alignment should form a most economical line of communication.
      3.The alignment should be such that it is easy to construct and maintain the road with minimum problem.
      4.The alignment should provide easy and safe driving conditions. Also safe from the view point of stability and natural hill slopes, embankment and cut slope etc.
      5.The proposed alignment should be fit into the latest general planning of the country.

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    2. Pasang Sherpa
      2021-12-14T13:20:31+05:45Added an answer on December 14, 2021 at 1:20 pm

      Though fluid is made of discrete molecules, fluid flow problem is analyzed treating it as a continuous media. Voids and cavities in fluid are ignored. The fluid is considered continuous and homogeneous media and hence the physical properties of the fluids are continuous from point to point and are expressed by continuous algebraic function of space and time co-ordinates. The fluid properties are treated to be same at a point and identical in all direction.

      Let us consider a flowing liquid in a system. If the pressure at any point becomes equal or less than vapour pressure the vaporization of the liquid starts. These vapour bubbles are carried by the following liquid into the region of high pressure where they collapse causing high impact pressure. This high pressure cause eroding of the adjoining boundaries and forms cavities on them. This phenomenon is known as cavitations.

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    3. Pasang Sherpa
      2021-12-14T13:26:29+05:45Added an answer on December 14, 2021 at 1:26 pm

      Inverted U-tube manometers are suitable for the measurement of small pressure difference in liquids. There are used when more precise results are required as inverted U-tube manometer is more sensitive as compared to others.

      Single column inclined manometer are used for the measurement of small pressures and is more sensitive than the vertical one. This can also be used for measuring negative gauge pressure

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