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Lab Manual for Surveying-1 - s-1 by AKASH KUMAR

  • Surveying-1 - s-1
  • Practical
  • Chhattisgarh Swami Vivekanand Technical University -
  • Civil Engineering
  • B.Tech
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Department of Civil Engineering Laboratory Manual SURVEYING-I DEPARTMENT OF CIVIL ENGINEERING Survey-I

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Department of Civil Engineering SURVEYING –I List of Practical (Minimum 15 practical should be performed out of the following) 1) Measurement of distance by ranging and chaining. 2) Locating various objects by chain & cross staff surveying. 3) Determination of area of polygon by chain and cross staff survey. 4) Measurement of bearings of sides of traverse with prismatic compass and computation of correct included angle. 5) Locating given building by chain and compass traversing, (One full size drawing sheet) 6) Determination of elevation of various points with dumpy level by collimation plane method and rise & fall method. 7) Fixing bench mark with respect to temporary bench mark with dumpy level by fly leveling and check levelling. 8) L-Section and cross section of road. ( One full size drawing sheet for L-Section and cross section ) 9) Measurement of horizontal angles theodolite by method of repetition. 10) Measurement of vertical angles with theodolite. ( One full size drawing sheet) 11) Determination of horizontal distance between two inaccessible points with thedolite. 12) Locating given building by thedolite traversing. (One full size drawing sheet) 13) Locating given building by plain table traversing. (One full size drawing sheet) 14) Three point problem in plane table traversing. 15) Determination of elevation of point by trigonometric levelling. 16) Contour plan of given area. (One full size drawing sheet) 17) Study of planimeter. 18) Determination of area of irregular figure by using planimeter 19) Study of Box Sextant, Abney Level, Optical Theodolite. 20) To give layout of given plan of building. Survey-I

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Department of Civil Engineering EXPERIMENT NO- 1 AIM : Measurement of distance by Ranging and Chaining EQUIPMENT- : Chain, Arrows, Tapes, Ranging Rods, Offset Rods, Cross staff or optical square, Plumb bob, wooden mallet, pegs. Figure: THEORY : By the various methods of determining distance the most accurate and common method is the method of measuring distance with a chain or tape is called Chaining. For work of ordinary precision a chain is used. But where great accuracy is Required a steel tape is invariably used. The term chaining was originally applied to measure Distance with a chain. The term chaining is used to denote measuring distance with either chain or tape, In the process of chaining, The survey party consists of a leader (the surveyor at the forward end of the chain) a follower (the surveyor at the rare end of the chain and an assistant to establish intermediate points) . The accuracy to which measurement can be made with chain and tape varies with the methods used and precautions exercised. The precision of chaining. For ordinary work, ranges from 1/1000 to 1/30,000 and precise measurement such as Baseline may be of the order of 1000000. Survey-I

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Department of Civil Engineering The chain is composed of 100 or150 pieces of galvanized mild steel were 4mm in diameter called links. The end of each link is bent into a loop and connected together by means of three oval rings which afford flexibility To the chain and make it less liable to become kinked. The ends of chain are provided with brass handles for dragging the chain on the ground, each with a swivel Joints so that the chain can be turned round without twisting. The length of the A link is the distance between the centres of the two consecutive middle rings.The end links include the handles metallic rings indicators of distinctive points of the Chain to facilitate quick reading of fractions of chain in surveying measurements. RANGING RODS: The ranging rods are used for marking the positions of Stations conspicuously and for ranging the lines. Io order to make these visible at a distance, they are painted alternately black and white, or red and white or red White and black successively.The adjustment of the chain should as far as possible be affected symmetrically on either side of the middle so as that the position of central tag remains unaltered. In measuring the length of survey line also called as chain line. It is necessary that the chain should be laid out on the ground in a straight line between the end stations. Survey-I

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