stadia Tacheometry determination of the gradient of the line - Computer Programming

Latest

C C++ Java Python Perl Programs Examples with Output -useful for Schools & College Students

Friday, April 1, 2011

stadia Tacheometry determination of the gradient of the line


stadia Tacheometry determination of
the gradient of the line

Aim :
            To determine the gradient of the line joining two staff stations ( A and B).

Instruments Required :
            Tacheometer, Levelling Staff.
            Given : R.L. of Bench Mark = 100.000

Procedure :
1.      Set up the instrument approximately between the given objects and do the initial adjustments.
2.      Take horizontal angles, vertical angles, stadia readings in both the faces and swings.

Calculation :
Case : I
            When the observed vertical angle α is of an angle of elevation
            V= The vertical distance from the instrument axis to the point C.
            h = Axial hair reading
            V=D tan a


            D = KS cos2a + C cosa
            R.L. of A = R.L. of H.I. + V - h
            where,
                        R.L. of H.I. = Elevation of B.M + Back sight (h0)



Case II
            When the observed vertical angle is an angle of depression.
            R.L. of A = R.L. of H.I. - V - h


Case : III
When the observed vertical angle is zero.
            R.L. of A = R.L. of H.I. - h
            AB = ÖD12 + D22 – 2D1D2 cosq

Result:
The gradient of the line joining A and B =

DETERMINATION OF THE GRADIENT OF THE LINE
Face : Right                                         Swing :  Left
Inst at
Sight to
Statia hair reading
Vertical angle
Horizontal angle
C
D
Mean
A
B
Mean
Top
Mid
Bot
o
,
,,
,
,,
o
,
,,
o
,
,,
,
,,
o
,
,,
O
A



















B



















Face :   Left                                         Swing :  Right
O
A



















B




















No comments:

Post a Comment