BAB IV

HASIL PERCOBAAN

4.1 Hasil

4.1.1 Pengukuran Teodolit

1. Titik I

a. α = 90° - VA

= 90° - 85,08333°

= 4,916667°

b. dh = 100 (BA-BB) cos2 α

= 100 (72-54) cos2 4,916667°

= 1.786,777819

c. dm = 100 (BA-BB) cos α

= 100 (72-54) cos 4,916667°

= 1.793,376732

d. dt = √dm2−dh2

= √1.793,3767322−1.786,7778192

= 153,7046771

e. derajat kemiringan = arc tg dtdh

= arc tg 153,70467711.786,777819

= 4,916672725°

f. % kemiringan = dtdh

x 100%

= 153,70467711.786,777819

x 100%

= 8,6%

2. Titik II

a. α = 90° - VA

= 90° - 82,019444°

= 7,980556°

b. dh = 100 (BA-BB) cos2 α

= 100 (19,7-14,75) cos2 7,980556°

= 485,4585176

c. dm = 100 (BA-BB) cos α

= 100 (19,7-14,75) cos 7,980556°

= 490,2060477

d. dt = √dm2−dh2

= √490,20604772−485,4581762

= 68,05875341

e. derajat kemiringan = arc tg dtdh

= arc tg 68,05875341485,4585176

= 7,980556027°

f. % kemiringan = dtdh

x 100%

= 68,05875341485,4585176

x 100%

= 14,0195%

3. Titik III

a. α = 90° - VA

= 90° - 82,49305556°

= 7,5069444°

b. dh = 100 (BA-BB) cos2 α

= 100 (13,1-5,8) cos2 7,5069444°

= 717,5400165

c. dm = 100 (BA-BB) cos α

= 100 (13,1-5,8) cos 7,5069444°

= 723,7431948

d. dt = √dm2−dh2

= √723,74319482−717,54001652

= 94,55437507

e. derajat kemiringan = arc tg dtdh

= arc tg 94,55437507717,5400165

= 7,506941516°

f. % kemiringan = dtdh

x 100%

= 94,55437507717,5400165

x 100%

= 13,17757517%

4.1.2 Pengukuran Meteran

1. 24 m

a. dt = 73 cm

b. dh = 2397 cm

c. derajat kemiringan = arc tg dtdh

= arc tg 73

2397

= 1,74°

d. % kemiringan = dtdh

x 100%

= 73

2397x 100%

= 3,045%

2. 48 m

a. dt = 53 cm

b. dh = 2397 cm

c. derajat kemiringan = arc tg dtdh

= arc tg53

2397

= 1,26°

d. % kemiringan = dtdh

x 100%

= 53

2397x 100%

= 2,21%

3. 72 m

a. dt = 46 cm

b. dh = 2400 cm

c. derajat kemiringan = arc tg dtdh

= arc tg46

2400

= 1,098°

d. % kemiringan = dtdh

x 100%

= 46

2400x 100%

= 1,91%

4.1.3 Pengukuran Hagameter

1. 24 m

a. % kemiringan = 14%

b. derajat kemiringan = arc tg % kemiringan

= arc tg 0,14

= 7,96°

2. 48 m

a. % kemiringan = 14%

b. derajat kemiringan = arc tg % kemiringan

= arc tg 0,14

= 7,96°

3. 72 m

a. % kemiringan = 16%

b. derajat kemiringan = arc tg % kemiringan

= arc tg 0,16

= 9,09°

4.1.4 Pengukuran Abney Level

1. 24 m

c. % kemiringan = 17%

d. derajat kemiringan = arc tg % kemiringan

= arc tg 0,17

= 9,64°

2. 48 m

c. % kemiringan = 16,5%

d. derajat kemiringan = arc tg % kemiringan

= arc tg 0,165

= 9,369°

3. 72 m

c. % kemiringan = 15,5%

d. derajat kemiringan = arc tg % kemiringan

= arc tg 0,155

= 8,8107°

4.1.5 Pengukuran Sunto Level

1. 24 m

a. 14°

% kemiringan = tg 14 x 100%

= 24,93%

b. 22%

derajat kemiringan = arc tg 0,22

= 12,40°

2. 48 m

a. 16°

% kemiringan = tg 16 x 100%

= 28,67%

b. 26%

derajat kemiringan = arc tg 0,26

= 14,57°

3. 72 m

a. 28°

% kemiringan = tg 28 x 100%

= 53,17%

b. 40%

derajat kemiringan = arc tg 0,40

= 21,801°