Showing posts with label "Leveling survey". Show all posts
Showing posts with label "Leveling survey". Show all posts

Saturday, July 31, 2021

Auto level survey calculation

 

Auto level is leveling device consisting on Instrument level machine ,Staff OR Reading Rod, Tripod or Stand. Auto-Level is Used to find out Elevations in different type of surveying processes.

In leveling process some steps are involved to complete survey which are as follows.

1- Establishment of Physical references like Permanent bench marks and Temporary Bench Marks.

2-Measurement and recording of area information as length measurements of features and distance measurement to locate the positions of different features at ground.

3-Calculations of leveling and making different drawings to produce perfect survey report.

I am submitting formulas for leveling work .

 

Height of Instrument  (H.I) = B.S + RL of Bench Mark  OR RL of any Spot.

        Reduced Level  (R.L)  = H.I - B.S OR I.S OR F.S

 

Back Sight                  = B.S     It is first reading after setting of level .

Inter-sight                    = I.S      The readings between B.S and F.S

Fore-Sight                    = F.S    It is last reading before shifting of level machine.

Suppose we have to find out elevations of Ground Floor using leveling process , First of all find any firm reference (As Concrete floors, Foundations) for establishment of Bench Mark. Firstly assuming the value of bench mark as 100 m , and set the level machine near bench mark to take first reading (B.S) and then start other readings (Inter-Sights) at ground where construction work is proposed. At the end survey will be closed with last reading of Fore-Sight (F.S).  The length of Ground where construction has been proposed is 350 Meters. We will enter all readings in leveling table to calculate the Ground Elevations.




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