... Chain surveying - Duration: 10:03. CHAIN TRANGULATION. Obstacles in Chaining: Horizontality of distance measurements can be maintained easily on a comparatively level ground. Engineering surveying lab Related documents. The area consists of too many undulations. It follows the principle of triangulation. Chain Surveying Definition of Chain Surveying – Chain Surveying is that type of surveying in which only linear measurement are made in the field.Chain surveying is suitable for surveying of small extent on open ground to secure data for exact description of the … 2. b) erect a perpendicular AC and bisect it at D. Erect perpendicular CE at C and range E in line with BD. Obstacles which prevent both chaining and ranging. The link is made of galvanized mild steel a) select point B on one side and A and C on the other side which is align to each other. Chaining Obstructed, Vision Free 3. A chain is mainly used in chain surveying to measure the distances. Chain surveying is the easiest type of survey in which area to be surveyed is divided into a number of triangles. In chain surveying only linear measurements are made i.e. This field work will continue for 3 field hours. Chaining obstructed. A and B are not visible from intermediate point on it. then AG=CF, Your email address will not be published. You can change your ad preferences anytime. Chain survey is the simplest method of surveying. Let AB be the chain line and C a point on it at which it is desired to erect a perpendicular (Fig. Chain surveying is unsuitable when. Chain length varies with temperature: Modern "Chains" made of alloy that has insignificant length variation in temperatures that surveyors work in. The area is very large. Join GH and prolong it. Chain surveying. In fig. 1 Answers; Answer added by Tony Paul, Lead transportation civil engineer , Department of Transportation 2 years ago . Looks like you’ve clipped this slide to already. Then measure AC, AD and CE. The chain survey is the simplest method of surveying. Ground undulations tend to introduce errors within measurements as the natural tendency of chain and/or tape will be to follow ground level. Evidently, BG=DE. While the length of the whole chain is measured from the outside of the one … What is a well-conditioned triangle? Illustrate with neat sketches, various types of obstacles encountered in chain surveying? The main principle of chain surveying is triangulation. Civilian Engineering (CE0) Academic year. Choose two points E and F on CD and then erect them perpendiculars EG and FH. Chain survey is suitable when Area to be surveyed is comparatively small and the Ground is fairly level. Helpful? Chain surveying instruments: Chain Tape Arrows Ranging Rods Offset Staff Optical Square Different types of Upvote (0) Views (77) Followers (1) Write an Answer Register now or log in to answer. Also select points C’ and D’ on the random line and erect perpendicular C’C and D’D on it. The length AB is calculated from the relation : AB=√AC²+BC². With due regard to this, the entire area to be surveyed is divided into several suitable triangles. Measure CD, then. If you continue browsing the site, you agree to the use of cookies on this website. The three main obstacles in chaining of a line are of the followi! Obstacles in chain surveying in telugu for diploma and b.tech students. Obstacles encountered in chain survey? Range D in line with AC and make AD=AC. Surveying, level, leveling, Civil Engineering, Site.Surveying is very important in civil engineering. It is a line in which the surface of the ground is intersected by a surface level Contour interval The Read more…, Thedolite is an instrument which measures the horizontal and vertical angle more precisely than other instrument. Erect AD and CE as perpendicular to AC line and range B,D and E in one line. Exercise name: obstacles in surveying thick jungles, ditches, buildings, etc. It is called a reconnaissance survey or reconnoitres. Various obstacles to chaining may be grouped into: (i) Obstacles to ranging (chaining free-vision obstructed) (ii) Obstacles to chaining (chaining obstructed-vision free) (iii) Obstacles to both ranging and chaining. The Obstacles in chain survey are three kinds: Obstacles to ranging but not chaining The chain consists of many small parts used for handling or reading the measurements. dear aspirants, today i will provide you the Surveying topic material is Since triangle […] ... Surveying around obstacles using offset and triangulation methods - Duration: 8:16. Measure CD, then AB=CD. none of angular measurement are taken. If you continue browsing the site, you agree to the use of cookies on this website. Save my name, email, and website in this browser for the next time I comment. let AB be the line in which we need to measure. Now customize the name of a clipboard to store your clips. Chain in surveying only simple details are know.The principle of chain surveying / chain triangulation is to provide a skeleton or framework consisting of a number of connected triangles. Select another point B on chain line such that AB = AC. The principles to be considered are: 1. At the ends chain is provided with brass handle with swivel joint so that it can be easy to roll or unroll the chain without twisting and knots. Obstacles in chaining Despite best efforts during reconnaissance and marking of stations, one Obstacles in Chain Surveying. 2018/2019. At every 10th link is provided with a tally of one teeth, 20th link with a tally of two teeth and so on till 40thlink. Baseline, Tie line, Check line, Main survey stations, Tie Stations, Location sketches of survey station Chain surveying is that types of surveying in which only linear measurements are taken in the field. In survey, there are obstacles to chaining which prevent chainman from measuring directly between two points and give rise to set of problems in which distances are found by indirect measurements. 1. no angular measurements are made. University. Obstacles in chain surveying 1. Generally a chain consists of 100 or 150 links each 300 mm or 200 mm length. Measure CD, then CD = AB, b) Set out AC perpendicular to the chain line. (ix) The lines should lie as far as possible on the ground level. Surveying. When there exist a large size building in between chain line or station, then chaining and ranging both are obstructed. Chain Surveying Procedure: For chain surveying, at least two men are required, but frequently three people are employed. ng 03 how to make money from apps in 2016 types. From point A, draw a random line AB‛ in any convenient direction but as nearly towards B as possible. Engr Javed Iqbal 3,603 views. Now, The length AB is calculated from Pythagoras theorem which is AB = √BC²-AC², c) By optical square, find a point C which subtends 90° with A and B. chain surveying is the branch of surveying in which only linear measurement are made in field. - Duration: 6:26. The method is very rapid and convenient. During this inspection surveyor ensure solution of such difficulties, these difficulties are termed as obstacles, to be more precise there are two types of obstacles (a) when chaining … In this method In this method thelengths of lines marked on the field are measured, while the details are measured byoffsets and ties from these lines. The chain surveying is the most commonly used surveying for quick and short measurements. Then measure a line BB’. (viii) The obstacles to ranging and chaining should be avoided as far as possible. are done in the office. Chains – In chain surveying chains are the most important equipment for the procedure of survey. 1 Koya university Faculty of Engineering Geotechnical Department Engineering surveying lab Student name: Rawand Muhsin Hassan Group: A Exercise No:3 Exercise name: obstacles in surveying Experiment date:1/oct/2019 Experiment … 2 Answers. lie on the chain line. and finally presenting the Chain survey is the simplest method of surveying. obstacles in chain surveying ! Reconnaissance is defined as the process of primary investigation of the land area to be surveyed. In this method the lengths of lines marked on the field are measured, while the details are measured by offsets and ties from these lines. • Surveying is defined as “taking a general view of, by observation and measurement determining the boundaries, size, position, quantity, condition, value etc. With due regard to this, the entire area to be surveyed is divided into several suitable triangles. Also range D in line with BE and make BE=ED. 22:02. Civil Engineering Assignment Help, SURVEYING, TYPES OF OBSTACLES IN CHAIN SURVEYING. If yes, then you are at right place.Chain survey is the simplest method of surveying. The exact arrangement of triangles to be adopted depends upon the shape and configuration of the ground and obstacles met with. Al-Azhar University. It is a principle of chain survey. Various methods of overcoming these obstacles are explained is this article. chain surveying studymaterial 2020 for all civil and mechanical aspirants. ii)Both ends of the line may not be visible from intermediate points on the line. CHAIN There may be two cases of this obstacle : Following method can be used in this cases: a) select two points A and B on either side of pond which need to measure. These could be: (a) Obstacles in ranging, (b) Obstacles in chaining (measuring horizontal distance), and (c) Obstacles in recording details. Overcoming obstacles together 7. Clipping is a handy way to collect important slides you want to go back to later. Question added by Victor Masanja Date Posted: 2016/07/12. 9. Obstacles in Ranging: Topography of land can create difficulties in ranging, i.e. Measurements are used to do the work precisely […] View Chain surveying part-3 from CE F211 at Birla Institute of Technology & Science, Pilani - Hyderabad. Measure CF. It is the exercise of physically measuring horizontal distances. Obstacle to both ranging chaining. In chain surveying, some times the chainman is unable to measure the distance between two points directly, due to obstacles.Hence it has to be found out by indirect measurements.Home Site pages Tags Calendar Site news Current Overcoming obstacles together 3 We want to thank the more than 170 CEOs for taking part in the second Hungary CEO Survey, and for sharing their views with us. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. EG and FH must be equal to AC. Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). Measure AC and BC. Possible to chain around the obstructed This is provided for the easy reading of measurements. Chain surveying is that types of surveying in which only linear measurements are taken in the field. Presence of too many obstacles. ground undulations hindering clear visibility among main stations, e.g. To erect, with a tape, a perpendicular to a chain line from a point on it: It can be done by forming a right angled triangle by taking three sides of a triangle in the proportion of 3, 4 and 5. (x) In lines lying along a road, the possibility of interruption during chain surveying, a line at one side of the road should be drawn. 3.29). Chain survey can also be used when the Area is open and Details to be filled up are simple and less. 27.a, 27.b, 27.c , a building interferes with the direct ranging as well as with the chaining of the line AB. Experiment date:1/oct/2019 We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. It is the exercise of physically measuring horizontal distances. Mark the point C and D on AE and BE such that CE=AE/n and DE=BE/n. It follows the principle of triangulation. Chain Surveying(Theory)-Civil Engineering - Duration: 41:28. if the line goes through a building or a house or a truck, we can use two perpendicular lines so that we can create another line from both ends … Chapter 3 eying Chain Surveying Dr. Mazen Abualtayef The lecture was prepared by Eng. The main principle of chain surveying or chain triangulation is to provide a framework consist of number of well-conditioned triangles or nearly equilateral triangles. Join CD and prolong it past the obstacle. Join B and C and prolong it to any point D. At D, set a 90° angle make a line DE such that DE=DC. although the Read more…, A contour is an imaginary line on the ground joining the points of equal elevation. How does land surveying work? TYPES OF OBSTACLES IN CHAIN SURVEY In survey, there are obstacles to chaining which prevent chainman from measuring directly between two points and give rise to set of problems in which distances are found by indirect measurements. Types of Thedolite Transit Thedolite – It is a thedolite whose telescope can be revolved through 180° about its Read more…. Obstacles in Chain Surveying - Duration: 22:02. Types of obstacles in chain Surveying http://wikienvironment.org Types of obstacles in chain Surveying and Solutions of obstacles in chain Surveying: Sometimes it will be observed that many obstructions like rivers, canals, ponds. Required fields are marked *. Obstacles … 1. Koya university 4. Chaining Free, Vision Obstructed 2. Cases often occur in the field where the distance between two points is required, but direct chaining from one point to the other is impossible because of some sort of obstacle. In these cases, we can use perpendicular lines or triangles to measure the distance that we can’t get it by chaining. Reconnaissance Survey and Index Sketch in Chain Surveying Anre October 09, 2019. Group: A The selected stations should produce well formed linked triangles or braced quadrilaterals. obstacles in chaining example obstacles in chain surveying ! chain surveying is the part of surveying and it is for civil and mechanical. King Saud UniversityCollege of EngineeringCivil Engineering DepartmentSE 211 CHAIN SURVEYINGSUMMARY & ABSTRACT:Chain (Tape) surveying is the simplest form of detail surveying. TYPES OF TIMBER FLOOR | CONSTRUCTION METHOD, TYPES OF FOUNDATION IN BUILDING (WITH FIGURE), Components of fireplace(with diagrams) | types, TYPES OF SHORING | RAKING, HORIZONTAL AND VERTICAL, TYPES OF SCAFFOLDING IN CONSTRUCTION | COMPONENT, WHAT IS CONTOUR LINE? Chain (Tape) surveying is the simplest form of detail surveying. Ranging obstructed. Chain (Tape) ... Any obstacles should be noticed. The formation of well-conditioned triangles becomes difficult because of obstacles. Priya said: (Thu, Apr 21, 2016 06:05:57 PM IST) Various obstacles to chaining are: i) Obstacles to ranging. For this obstacle, the following method can used, 2. select a point A and erect a perpendicular AC of any convenient length. Here, chaining process is obstruct but ranging can be done. d) Select any point E (mostly centrally) and range C in line with AE, Making AE equal to EC( AE=EC). The point B’ should be visible from B and BB’ is perpendicular to the random line(AB’). Also, read: Consistency Test of Cement. If a line DF is drawn parallel to the line AB, DF will perpendicular to line CE. Exercise No:3 1 0. Please sign in or register to post comments. See our User Agreement and Privacy Policy. Presence of too many obstacles. Unit2 - Chain surveying. Civil Engineering Assignment Help, SURVEYING, TYPES OF OBSTACLES IN CHAIN SURVEYING User Account Sign In Sign Up All Pages Home About us Team All … This post describes 5 different types of errors exist in chain surveying and how we can eliminate those errors with mathematical equations. Chain surveying is suitable for open ground and small extent area. Methods of calculating Land area (i) Average ordinate rule (ii) Simpson’s rule (iii) Trapezoidal rule. 3. Angles should be > 30o & <120o . User Account. 8:16 . Obstacles In Chain Surveying | [HINDI] Welcome you all...!!! Comments. iii) Obstacles to both ranging and chaining. Student name: Rawand Muhsin Hassan Metric Chain; Revenue chain; Steel Band or Band Chain; Engineer’s Chain; Gunter’s Chain; Procedure of Chain surveying. Bookmark Like 2 Dislike 0 ⚐ Report. Measure CE. In this method, the lengths of lines marked on the field are measured, while the … Ground undulations tend to introduce errors within measurements as the natural tendency of chain and/or tape will be to follow ground level. CHARACTERISTIC | METHOD, Choose two points A and B to one side and erect perpendicular AC and BD of equal length. e) Select any suitable point E and measure AE and BE. Then triangles ABD and FDE will be similar. The Obstacles in chain survey are three kinds: This type of obstacle, Ranging is obstacle by high rise ground, so the ends are not intervisible. This type of surveying is suitable for small area to take simple detail. LAB #4: CHAINING ACROSS OBSTACLES 10 LAB #5: CHAIN SURVEYING (MAPPING BY TAPE) 15 LAB #6: STUDY OF LEVEL AND LEVELLING STAFF 18 LAB #7: … The chain surveying is the most commonly used surveying for quick and short measurements. Every aspect of the life requires some measuring units. The area is crowded with many details. They are: (1) The surveyor, who does the reading and booking, (2) The leader, and (3) The follower. 7 . Magic Monk 1,345 views. The length of the links is distance between the centre of two consecutive middle rings. Chain survey becomes more complicated method when there are raised points (obstacles) in between areas to be surveyed Errors in Chain Surveying The different types of errors that needs to be considered in chain surveying are:- i) Both ends of the line may be visible from the intermediate points on the line. Chain surveying is the type of surveying in which only linear measurements are made in the field. Experiment report submission date:8/oct/2019. Various article about different surveying issue are discussed here.Chain Survey - Procedure, Applicability, Survey Stations and Their Selection.Do you want to learn about chain surveying? (iv) Revenue chain. When it contains no angle smaller Thus, a network of the triangles is formed. The actual length of the chain is become short or some time long. 4. Again with E as center, draw another arc of the same radius to cut the previous arc in G. Join GE which will be in range with the chain line. 3.29). Waning optimism worldwide, increased focus on existing markets “The uncertainty regarding the EU economy is a serious challenge for all manufactures.” Kenji Karato, Managing Director of Bridgestone Tatabánya Termelő Kft. Chain surveying is the easiest type of survey in which area to be surveyed is divided into a number of triangles. Principle of Chain Surveying. Obstacles in Chaining. Your email address will not be published. Measure AC and BC. The formation of well-conditioned triangles becomes difficult because of obstacles. Already have an account? Chain surveying instruments: Chain; Tape; Arrows ; Ranging Rods; Offset Staff; Optical Square; Different types of Chain. 1 Geotechnical Department The area consists of too many undulations. Those are disturbing the line of measuring is called Obstacles. This obstacle to chaining may be overcome by measuring along a random line. Avoid any obstacles to ranging or chaining. Chain surveying is the type of surveying in which only linear measurements are made in the field. Faculty of Engineering Measure DE. existence of a hillock in the line of sight. This is most suitable adapted to small plane areas with very few details. The chain are the straight links of galvanised mild steel wire bent into rings at the ends and joined each other by three small circular or oval rings. The three main obstacles in chaining of a line are of the following types: 1. Obstacles in Chain Surveying: Because of several specific characteristics of ground features, some obstacles are encountered during chain surveying that needs special consideration. What is its specific advantage? With F as center and AB as center, draw and arc. Obstacles in chain surveying (i) Chaining free but vision obstructed (ii) Chaining obstructed but vision free (iii) Both chaining and vision obstructed. Choose point F in line DE such that DE=DC. then AB=CE, c)Fix point C in such a way that it subtends 90° with AB. To erect, with a tape, a perpendicular to a chain line from a point on it: It can be done by forming a right angled triangle by taking three sides of a triangle in the proportion of 3, 4 and 5. Obstacles in Chaining: Horizontality of distance measurements can be maintained easily on a comparatively level ground. (1). Chaining Free, Vision Obstructed 2. Principle of Chain Surveying The main principle of chain surveying is triangulation. … These rings provide the flexibility to the chains. Chain Surveying Is Unsuitable When. The area is crowded with many details. In the chain survey, only measurements are taken in the field, and the rest work, such as plotting calculation, etc. Click Here to Download Surveying Material . Assignment Help: >> Obstacles in Chain Surveying - Obstacles in Ranging. A chain may be metric or non-metric. 1. Sign In; Sign Up; All Pages. Chains are the measuring instrument used in surveying formed by the 100 links of 4mm galvanized mild steel wire. 10. Share. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. These lines are otherwise important as they fulfill the requirements of well conditioned triangles or they, are necessary due to some other factors. At D, erect a perpendicular DE to cut the line in E. Then AB=AE. These obstacles can be avoided in chaining operation by applying some fundamental geometric rules. of land, estates, building, farms mines etc. At the center of the chain is provide… 3. See our Privacy Policy and User Agreement for details. ii) Obstacles to chaining. Chaining and Vision Both Obstructed. Intervening trees and bushes are the examples of such obstacles. Hence chain surveying is some times called chain triangulation. The area is very large. 2. … Like this answer? This type of surveying is suitable for small area to take simple detail. The basic reasons for errors caused in the chaining process in surveying are due to: The Chain or tape with erroneous length Inefficient Ranging Inefficient Straightening Careless holding and marking Sag in Chain Personal Mistakes Heba Hamad, The University of Palestine and modified by Dr. Mazen Abualtayef, The Islamic University of Gaza 3.1 Introduction Common These links are joined by 3 circular or oval wire rings. Course. Procedure of Chain Surveying. Tacheometry survey is a branch of surveying in which horizontal and vertical distance are calculated with the help of measured horizontal distance and observed vertical angle. it will accumlate errors in measurment at the end of the measuring of the length for example Let AB be the chain line and C a point on it at which it is desired to erect a perpendicular (Fig. Few long lines should be used. This problem can be solved by the reciprocal ranging. Types of obstacles in chain surveying. Set out equal perpendiculars AC and BD. Measure CE = 40 units (chain links or decimetres). Asked by: Kalachand Sadhu on Jan 2, 2016. APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide. It is used to find the area of the field. There may be two cases of the obstacle. Obstacles in Chaining When selecting survey stations, some survey lines might get selected in which there are obstructions. Then you are at right place.Chain survey is the simplest method of surveying is that of... To already and Index Sketch in chain surveying is the exercise of physically measuring horizontal.. Should be visible from intermediate point on it to collect important slides want... Slides you want to go back to later measuring along a random line AB‛ in any convenient direction as! You continue browsing the site, you agree to the use of on! Used to find the area is open and details to be surveyed in... And a and B are not visible from the relation: AB=√AC²+BC² Read more… the relation: AB=√AC²+BC² center AB., building, farms mines etc nearly towards B as possible on other! Well as with the chaining of the line of measuring is called obstacles should lie far... Handy way to collect important slides you want to go back to later cookies... To improve functionality and performance, and website in this browser for the next time i comment main! Read more…, a contour is an imaginary line on the line there exist a size... As center and AB as center, draw a random line ( AB ’ ) adopted depends the! That types of surveying in which we need to measure ’ is perpendicular to the random line here, process... Money from apps in 2016 types most commonly used surveying for quick and measurements. Stations should produce well formed linked triangles or braced quadrilaterals browsing the site, you agree to the may. Commonly used surveying for quick and short measurements as the natural tendency of chain @ scale, APIs Digital... Most suitable adapted to small plane areas with very few details surveying | HINDI. Is for civil and mechanical aspirants drawn parallel to the use of cookies on this.... By 3 circular or oval wire rings next time i comment DE such that CE=AE/n DE=BE/n. Be filled up are simple and less obstacles in chain surveying in line with AC and it. Three people are employed methods of calculating land area to take simple.! Out AC perpendicular to line CE 3 circular or oval wire rings Topography! Surveying only linear measurements are taken in the field Topography of land can create difficulties in ranging: Topography land. I comment important equipment for the next time i comment show you more relevant ads browser the! Slideshare uses cookies to improve functionality and performance, and to show you relevant... We can ’ t get it by chaining possible on the random line AB‛ in any length... Are of the line configuration of the followi people are employed to later 200 mm length measure,..., your email address will not be published survey stations, e.g suitable. Work precisely [ … ] chain surveying the main principle of chain surveying is.... Performance, and website in this browser for the easy reading of measurements way to collect important slides you to... Name, email, and to provide a framework consist of number well-conditioned! Hillock in the field choose point F in line DE such that CE=AE/n DE=BE/n! In ranging, i.e the three main obstacles in ranging: Topography of land,,... In ranging: Topography of land, estates, building, farms mines etc chaining may overcome... Some other factors Both are obstructed which we need to measure the distance that we can eliminate errors... [ HINDI ] Welcome you all...!!!!!!!!!!!!!... Large size building in between chain line or station, then CD = AB, B ) erect perpendicular... 200 mm length for 3 field hours ranging can be revolved through 180° about its more….

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