Survey_camp_group_3 Civil EngineeringFINAL.pptx

A survey camp report with all the required details.

1. SURVEY CAMP - 2024 B-tech in Civil Engineering Graphic Era Hill University, Dehradun Uttarakhand Department of Civil Engineering GRAPHIC ERA HILL UNIVERSITY DEHRADUN UTTARAKHAND 248002 February, 2024 Submitted By: - GROUP 3

2. S No. Name University Roll No. 1 VARUNDEV BAGGA 2216039 2 SHAURYA UNIYAL 2119170 3 ANSH RAWAT 2216008 4 SURJAKANTA YENGKOKPAM 2216037 5 AASTHA RAWAT 2116051 Group 3

3. Contents Reconnaissance Survey Auto level Micro-optic theodolite Plane table survey

4. Reconnaissance Survey A reconnaissance survey, also known as a reconnaissance or preliminarily survey, refers to a preliminary examination or exploration of an area to gather information before more detailed and extensive investigations or projects are undertaken. This type of survey is commonly conducted in various fields, including geography, geology, archaeology, urban planning, and military operations.

5. Day 1 On the first Day of survey camp we have done the reconnaissance survey by plotting main points and base line throughout the campus and measured the distance between the points.

6. Points Distance(m) AB 57 BC 75 CD 50 DE 100 EF 35 FG 140 GH 10 HI 50 IJ 50 JK 68 KA 60 GL 69 LM 50 MN 50

7. Instruments used for Reconnaissance Survey

8. Auto level An auto level is an optical tool with an inbuilt mechanism that removes variance and inaccuracy from measurements. It can be used to establish or check points on the same horizontal plane. Some of the uses of auto level are:- It is used to establish or verify points in the same horizontal plane. It is used in surveying and building. It is used to measure height differences and to transfer, measure and set heights.

9. Instruments used in auto level

10. Advantages Easy to use: Auto levels are user-friendly and require minimal training for operation. Quick setup: They can be set up quickly, saving time in surveying tasks. Accurate for height measurements: Auto levels provide reliable vertical measurements, ensuring accuracy in determining elevations. Cost-effective: Compared to more advanced surveying instruments, auto levels are generally more affordable. Robust design: Auto levels are built to withstand tough environmental conditions, making them durable and reliable in the field. Disadvantages Limited functionality: Auto levels are primarily designed for simple leveling tasks and lack the advanced features of other surveying instruments. Limited range over longer distances: Their effectiveness decreases over extended distances, limiting their application in large-scale surveys. Manual adjustments may be required: Fine-tuning may be necessary in certain situations, requiring manual adjustments to ensure accuracy. No angular measurement: Auto levels are focused on vertical measurements and do not provide angular measurements, limiting their versatility. Dependency on a clear line of sight: Achieving accurate results depends on an unobstructed line of sight between the instrument and the survey points, which may be challenging in some terrain or urban environments.

11. Day 2 – Day 3 We performed auto level survey by using the points marked from the activity of day 1 which was Reconnaissance Survey, in which we made a closed traverse of the points from point A-K and a open traverse from point K-N.

12. AUTO LEVEL GRAPH Surface profile

13. Micro-optic Theodolite A micro-optic theodolite is a precision optical instrument used in surveying and engineering for measuring horizontal and vertical angles with high accuracy. It is a compact and lightweight version of a traditional theodolite, designed for portability and ease of use in various field applications.

14. Day 4 On day 4 we performed micro optic survey from PT-2 and followed a clockwise path to close the traverse to T1 and we further continued the survey for the open traverse with we performed from PT-7 to T2. We measured the interior angles between the points by using micro-optic.

15. Points Angles ∠ A 147*4’45” ∠ B 156*10’ ∠ C 104*34’ ∠ D 186*57’ ∠ E 142*34’25” ∠ F 115*18’20” ∠ G 160*51’40” ∠ H 142*10’ ∠ I 97*10’ ∠ J 185*51’10” ∠ K 181*18’40” ∠ L 158*55’40” ∠ M 182*48’40”

16. Plane Table Survey Plane table survey is a method of surveying that involves the use of a plane table, which is a flat table-like instrument equipped with a drawing board and an alidade (a sight or rule used in surveying to align and measure angles). This technique is particularly useful for mapping and topographic surveys in the field.

17. Instruments and accessories used in Plane Table Surveying Plane Table with Tripod Alidade Spirit level Trough compass Plumbing fork with plumb bob Ranging rod

18. Why orientation of the plane table is important? When there are more than one stations, the plane table has to be shifted to each station to prepare a map on the sheet. While transferring to each station, if there is any small error occurs, then it totally distorts the diagram on the sheet and the relative positions of objects on the sheet are not as same as that on the field. So the total plane table surveying becomes useless.

19. Advantages Disadvantages It is simple and cheaper than the theodolite survey. It is most suitable for small-scale maps. It is useful in magnetic areas, where a compass survey is not possible. The mistakes in writing readings in the field books are eliminated. No great skill is required to operate. It is not intended for very accurate work. It is not suitable in monsoon. Due to its heaviness, it is inconvenient to transport. This involves so many accessories, so there are high chances for them to be lost.

20. Methods of Plane table survey Radiation method: The plane table is set up at a known point, and the surveyor sights objects on the ground from this point. The alidade is used to measure the angles between the objects and the known point, and these angles are then used to plot the positions of the objects on the paper. Intersection method: The plane table is set up at two or more known points, and the surveyor sights objects on the ground from each of these points. The alidade is used to measure the angles between the objects and the known points, and these angles are then used to intersect lines on the paper, which gives the positions of the objects.

21. Day 5 Onwards From day 5 of survey camp we started plane table survey in which we transferred the points to the plane table sheet with the help of radiation method of plane table and the intersection method of plane table survey

22. THANK YOU