無料ダウンロード rise and fall method and height of collimation method 702254-How to calculate height of collimation method

The rise and fall method;Of instrument or height of collimation method and rise and fall method The columns for booking the readings in a level book are same for both the methods but for reducing the levels, the number of additional columns depends upon the method of reducing the levels Note thatMETHODS 1 Height of Instrument method The basic equations are Height of instrument for the first setting= RL of BM BS(at BM) Subtract the IS and FS from HI to get RL of intermediate stations and change points Checking ΣBS ΣFS = Last RL –First RL This is –ve for FALL and ve for RISE METHODS OF LEVELLING LEVELLING

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How to calculate height of collimation method

How to calculate height of collimation method-Oct 13, 17 · The difference between Height of Collimation Method (HCM) and Rise and Fall Method (RFM) are as follows HCM It is more rapid and saves a considerable time and labour RFM It is laborious as the staff reading of each station is compared to get a rise or fall HCM It is well adopted for reduction of levels for construction work such as longitudinal or crosssection1 HI method is less tedious, more rapid and simple method Rise and fall method is more tedious 2 In an HI method less calculation is required Rise and fall method more calculation is required 3 HI method is less accurate Rise and fall method is more accurate 4

Agr242 How To Calculate Reduced Level By Rise And Fall Method And Height Of Collimation Method Youtube

A reduced level is the vertical distance between a survey point and the adopted level datum There are two methods for calculating reduced levels, namely the "rise and fall" method and the "heightWhich method is more accurate for leveling work !Sep 27, 11 · RISE AND FALL METHOD Determine the RLs of various points if the reduced level (RL) of a point on which the first reading was taken is gives the Height of Rise and Fall method and applies the check Station BS IS FS Rise Fall RL Remarks 1 2 1536 0974 72 0536 1216 BM A RL=m CP1 R/F = BS FS = 1536 – 72 = 0

First one is rise and fall method, and the height of instrument method is the other one The letters of HI means height of instrument, in other terms its called height of collimation BS FS = if the answer is above 0 , is called rise At the answer is below zero is called fallRise and Fall Method is the method of calculating the difference in elevation between consecutive points in levelling work Some of the points you have to know before starting numerical are Back sights The first reading after seeing the instrument is called back sights This is taken at a known point like BM or FS It is denoted as BSHEIGHT OF COLLIMATION AND RISE & FALL METHOD Aim To determine to difference in elevation between the given points adopting height of collimation (HC) and rise & fall method Instruments required Dumpy Level with stand, Telescopic Metric Staff HEIGHT OF COLLIMATION Procedure Compound leveling in also called as differential or fly leveling

Oct 30, 11 · Height of Collimation Method;Height of Instrument or Collimation method;Rise and Fall Method;

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Pdf Methods Of Levelling 1 Height Of Collimation Method 2 Rise And Fall Method Buddhi Anuradha Academia Edu

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) LSection and cross section of road ( One full size drawing sheet for LSection and cross section ) 9) Measurement of horizontal angles theodolite by method of repetitionMethods of Levelling Height of Collimation MethodRise and Fall Method Collimation Method It consist of finding the elevation of the plane of collimation ( HI) for every set up of the instrument, and then obtaining the reduced level of point with reference to the respective plane of collimation Rise and Fall Method It consists of determining the difference of elevation between consecutiveThe decrease level of each point is then acquired by adding the rise to or subtracting the fall from the RL of the preceding point The arithmetic check in this method is as follows ∑ BS ∑ FS = ∑ Rise ∑ Fall = Last RL First RL It can be noted that the first method of collimation is simpler and faster than the rise and fall method

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What Is Height Of Instrument And Rise Fall Method Of Levelling

Jul 12, 16 · Levelling Method 1 Height of Collimation Method 7 6 2 Rise and Fall Method Apparatus UsedFor Levelling Automatic level (Auto level) It is a professional levelling tool which is used by contractors, builders, land surveyors and engineers whoAug 24, 14 · collimation method, height of instrument method As opposed to the "rise and fall method" Kollimationsverfahren n, Kollimationsmethode fFor example, automatic level, adjustableleg tripod, optical plummet, horizontal bubble level, barcoded level rod and plump bob Besides, we also learnt the way to calculate the reduced level by using height of collimation method and rise and fall method and also learnt to

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31 Collimation method 10 32 Rise and fall method 14 33 Which method to use 15 34 Accuracy of recording and closing errors 15 4 APPLICATIONS 16 41 Preparations 16 42 Working procedure for a (small) weir site 17 REFERENCES 24 ii1 Civil Engineering Most Important Points https//wwwyoutubecom/playlist?list=PLd2fXMyRqYph0uv0ynK22LLyGE2_sGw2 How to calculate Plot Area (Feet2, YardPDF On Sep , 16, Bharat Gadakh published Dumpy level methods Rise and fall ,Collimation methods Find, read and cite all the research you need on ResearchGate

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The comparison of line of collimation method and Rise – fall method Height of collimation Rise fall method 1 It is more rapid & save time 1 It is laborious to compute the rise & fall then RL 2 This method is use for reduction of level for construction work Such as longitudinal or cross sectional leveling operationThe height of collimation changes only when the level is moved to a new position The new height of collimation is found by adding the backsight to the RL at the change point Please note there is no check on the accuracy of intermediate RL's and errors could go undetected The rise and fall method may take a bit longer to complete, but a check on entries in all columns is carried outHeight of Collimation Method This method is simple and easy Reduction of levels is easy Visualization is not necessary regarding the nature of the ground There is no check for intermediate sight readings;

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Booking The Staff Reading And Reduction Of Levels

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