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Introduction to Curves, Surveying and Levelling | Surveying and Levelling Notes- Agricultural Engg - Agricultural Engineering PDF Download

HORIZONTAL CURVES

Curves provided in the horizontal plane to have the gradual change in direction are known as horizontal curves.

VERTICAL  CURVES

Curves provided in the vertical plane to obtain the gradual change in grade are called as vertical curves.

Curves may be circular or parabolic. Curves are generally arcs of parabolas.

Curves are laid out on the ground along the centre line of the work.

NEED FOR PROVIDING CURVES

Curves are needed on Highways, railways and canals for bringing about gradual change of direction of motion. They are provided for following reasons:-

i)    To bring about gradual change in direction of motion.

ii)   To bring about gradual change in grade and for good visibility.

iii)  To alert the driver so that he may not fall asleep.

iv)   To layout Canal alignment.

v)    To control erosion of canal banks by the thrust of flowing water in a canal.

The document Introduction to Curves, Surveying and Levelling | Surveying and Levelling Notes- Agricultural Engg - Agricultural Engineering is a part of the Agricultural Engineering Course Surveying and Levelling Notes- Agricultural Engg.
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FAQs on Introduction to Curves, Surveying and Levelling - Surveying and Levelling Notes- Agricultural Engg - Agricultural Engineering

1. What are curves in surveying and levelling in agricultural engineering?
Curves in surveying and levelling refer to the curved lines or paths that are used to connect different points on a landscape or field. These curves are designed to provide smooth transitions and accommodate changes in elevation, slope, or direction. They are commonly used in agricultural engineering to plan drainage systems, irrigation channels, and transportation routes.
2. How are curves in surveying and levelling determined?
Curves in surveying and levelling are determined using various mathematical calculations and measurements. One common method is the use of circular curves, which involve determining the radius, length, and central angle of the curve. The location of the curve is then marked on the ground using stakes or markers, and the necessary leveling or excavation work can be carried out accordingly.
3. What is the significance of curves in agricultural engineering?
Curves play a crucial role in agricultural engineering as they help optimize the design and layout of various agricultural structures and systems. By incorporating curves, engineers can ensure efficient water drainage, prevent soil erosion, and improve the distribution of irrigation water. Curves also contribute to the overall aesthetics and functionality of agricultural landscapes.
4. Can curves in surveying and levelling be adjusted or modified?
Yes, curves in surveying and levelling can be adjusted or modified based on the specific requirements of a project. For example, if the terrain or landscape changes, the radius or length of a curve may need to be altered to accommodate these changes. Similarly, adjustments can be made to the slope or alignment of a curve to ensure proper water flow or vehicular movement.
5. Are there any software or tools available to assist in designing curves in agricultural engineering?
Yes, there are several software programs and tools available that can assist in designing curves for agricultural engineering projects. These software programs use advanced algorithms and mathematical calculations to determine the optimal curves based on the given parameters and specifications. They can also generate detailed drawings and plans for implementing the curves on the field. Some popular software options include AutoCAD, Civil 3D, and Land Desktop.
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