The staff reading taken along a levelling operation are given below the instrument shifted after taking 5th, 10th , 14th and 19th reading.

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written 7.3 years ago by

teamques10 ★ 70k

• modified 6.1 years ago

Arranged data in a tabular form and find the R.L of all the point by rise and fall method if 10th reading taken to BM of RL 185.635.

1.355, 1.605, 2.125, 0.685, 1.365, 2.015, 1.355, 1.385, 0.685, 2.105, 1.685, 1.155, 1.105, 2.105, 1.085, 1.345, 1.355, -2.015, 1.305, 1.655, 1.685 and 1.455.

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Station	B.S	I.S	F.S	Rise	Fall	R.L	remark
1	1.355					185.205	1st RL
2		1.605			0.25	184.955
3		2.125			0.52	184.435
4		0.685		1.44		185.875
5	2.015		1.365		0.68	185.195	CP1
6		1.355		0.66		185.855
7		-1.385		2.74		188.595	Inverted staff reading
8		0.685			2.07	186.525
9	1.685		2.105		1.42 …

Station

B.S

I.S

F.S

Rise

Fall

R.L

remark

1.355

185.205

1st RL

1.605

0.25

184.955

2.125

0.52

184.435

0.685

1.44

185.875

2.015

1.365

0.68

185.195

CP1

1.355

0.66

185.855

-1.385

2.74

188.595

Inverted staff reading

0.685

2.07

186.525

1.685

2.105

1.42 …

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