Page 7 - ebook_soil engineering practical workbook_15112021

Contents

Table of Contents
1 LEVELLING ..............................................................................................................................................1

1.1 Experiment outcomes ...................................................................................................................1
1.2 Theory ............................................................................................................................................1
1.3 Apparatus/Equipment ...................................................................................................................3

1.4 Safety Precautions .........................................................................................................................3
1.5 Procedures.....................................................................................................................................3

1.5.1 Temporary adjustment ..........................................................................................................3
1.5.2 Elevation between two points ..............................................................................................5

1.5.3 Contour Mapping ..................................................................................................................6
1.6 Result/Data ....................................................................................................................................7

1.6.1 Rise and fall method ..............................................................................................................7
1.6.2 Height of collimation method ...............................................................................................8
1.6.3 Simple Calculation Check ......................................................................................................9

1.6.4 Actual and Allowable Misclosure (accuracy in levelling) .......................................................9
1.6.5 Contour ............................................................................................................................... 10

1.7 Discussion ................................................................................................................................... 12
1.8 Conclusion and Recommendation ............................................................................................. 13

2 THEODOLITE ....................................................................................................................................... 14
2.1 Experiment outcomes ................................................................................................................ 14

2.2 Theory ......................................................................................................................................... 14
2.3 Apparatus/Equipments .............................................................................................................. 15
2.4 Safety Precautions ...................................................................................................................... 16

2.5 Procedures.................................................................................................................................. 16
2.5.1 Setting up the Theodolite. .................................................................................................. 16

2.5.2 Levelling the Theodolite. .................................................................................................... 16
2.5.3 Focussing ............................................................................................................................ 17

2.6 Method of measuring horizontal angles .................................................................................... 18
2.7 The following steps for measuring the face right observation. ................................................. 19

2.8 Project : Training of temporary adjustment and measuring horizontal angle measurement ... 19
2.9 Result/Data ................................................................................................................................. 20

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