Rehabilitation And Surveying Of Roads

Project and Seminar Material for Civil and Environmental Engineering

Rehabilitation And Surveying Of Roads


Chapter One


1.0 Introduction

1.1 Background To The Study

Engineering Surveying is one of the branches of surveying which from the general express for any survey work carried out in connection with construction engineering and building project, it is a large scale topographical map survey which the basis for design of engineering works such as highways, railways, canals, tunnels, dams, pipelines and transmission lines.

In the word of engineering and environmental studies, surveying has been recognized as the inevitable operation been described as be the bedrock of every meaningful development. The greater part of its responsibility is seen from the various types of surveying which are all geared toward promoting route ways, convenience, accessibility and spatial declination of both natural and social environment. In addition, surveying means the activities of planning, designing, constructions, development and rehabilitation of roads, depending on the survey data required by the surveyor.

Route survey which is an aspect of engineering survey may be defined as the survey operation that is done for the establishment of the horizontal and vertical alignment of transportation facilities. It involved: planning, design and setting out of any route such as railways, highways, pipelines and canals etc. as obtained by a surveyor and it also involved the proper assessment of natural and man-made features.

In addition, this type of survey should be applied when there is need for alignment, expansion, or rehabilitation at any existing route (road) e.g. for traffic purposes. The reason is that route survey provides a plan/map that shows the alignment, details, profile and cross sectional leveling which depicts the nature of the terrain of a given strip of land which serves the purpose of location, design and construction of route networks.

Good road network is one of the basic amenities needed by human being as movement is one of the characteristics of living things. There are needs for people to move from one place to the other and transportation of goods and services. Therefore for any meaningful development in a country, good road is a must.


1.2 Significant Of The Project

It was discovered that the route from Oyun to olorun village moro Local government Ilorin, Kwara State, had been badly eroded and full of potholes; also, the road is found to be too narrow and needed to be extended considering the volume of traffic plying the road. Rehabilitation of this road should be carried out in other to increase its carrying capacity thereby increase the physical development and human activities therein. Due to these, certain information about the road must be acquired which calls for route survey so as to get the baseline data necessary for the road design.

The main aim of this project is:

To carry-out Route Survey of Oyun-Oloru road in Moro local government area, Ilorin, Kwara State

1.3.2 Objectives

In actualization of the said aim of the project, the following objectives

Were followed sequentially:

  1. Reconnaissance which include office planning and field reconnaissance.
  2. Identification of existing features and adjoining roads.
  3. Stability of the ground controls to be use for orientation.
  4. Determination of centre line and marking of chainages along the centre line at an interval of 25m.
  5. Marking out some selected points for the cross-sectioning at intervals of 3m to the right and left on the profile and also the edges of drainage was marked.
  6. Leveling to determine the height of some selected points along the road.
  7. Detailing by the use of a total station Mato NTS352R
  8. Plan production (graphical representation of the surveyed road way) drawn with appropriate scale.
  9. Reports write up.

1.4 Project Specifications

The following are the specification to be ascertained in the project:

Traverse must commence on three coordinated (known) controls and closed on another set of three coordinated controls which must be confirmed undisturbed by necessary measurement (control checks).

Third order traverse must be run along the route on all turning points at one zero observation and the angular difference from both faces should not be more than thirty seconds (30″), the angular misclosure is determined by 30″√n,

Where ‘n’ is the total number of station observed.

Establishing traverse points by using pegs together with nails and bottle corks.

Spirit leveling must commence on a known benchmark and closed back on another known benchmark. Formulae for its misclosure are ±24mm√k, where ‘k’ is the total distance covered in kilometers.

Leveling must be observed at every 25m intervals on the centre line and at 5m intervals on both sides of the centre line for the cross sectioning. Edges of drainage at both sides should be heightened.

Fixing of relevant features to enhance assessment and necessary composition for good interpretation of plan.
Setting out curve by using deflection angle method within third other survey.

The accuracy of the project must fall within the order of the project.


1.5 Scope Of The Project

The entire project covered the following:-

Reconnaissance (both office planning and field reconnaissance).

Data acquisition:

  1. Selection of stations.
  2. Traverse angular observation and data recording.
  3. Linear measurement with the aid of Mato NTS352R total station.
  4. Spirit leveling of traverse centre line and adjacent sides (longitudinal or profile and cross sectioning).
  5. Fixing of details by tacheometry method.
  6. Computations to determine:
  7. Horizontal coordinates (i.e. x and y coordinates)
  8. Vertical coordinates (i.e. z coordinates) by level reduction.
  9. Setting out angles and distance for the curve.

Data analysis i.e. comparing result obtained with the required accuracy.

Data presentation :

  1. Production of horizontal alignment (i.e. plan showing existing features and the propose route).
  2. Production of longitudinal section plan
  3. Production of cross section plan
  4. Project report writing: – This involves writing of detail report in connection with entire project done in conformity with the outline given by the project supervisor.

1.6 Personnel

The underlisted names are the personnel that participated in the execution of this project. They are:

  • ABDUL RAHEEM SADIAT FUNKE HND/16/SGI/FT/001 (writer)
  • ADENIYI ADEBOWALE OLUMIDE HND/16/SGI/FT/025
  • AWONIRAN SAKIRU OPEYEMI HND/16/SGI/FT/015
  • HAMMED KAZEEM BOLAJI HND/16/SGI/FT/018

1.7 Study Area

The project site is the route from Oyun to olorun village moro Local Government area Ilorin, Kwara State. It cover approximately 3.km extent of land.


Rehabilitation And Surveying Of Roads


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