Investigation Into Ascertain The Causes Of Failure And Present Traffic Capacity Of Highways

Investigation Into Ascertain The Causes Of Failure And Present Traffic Capacity Of Highways

Abstract

The substance of this design work is to look into the causes of trace failure and the different types of failure which are presented along the Eliozu- New Airport road in Obio/ AkporL.G.A in River state, taken as a case study. Some factors identify as being responsible for the failure of the chosen road section includes, poor sub grade soil with questionable material. Ground water study is carried out, which give sapience to it effect to the failure of the flexible pavement, lack of drainage installations, indecorous pavement design, poor contraction and business volume increase and lack of conservation are critically taken into consideration.

Business volume count and soil test analysis and test on asphalt similar as birth- gradation test, are duly carryout, of which it affect gives an acceptable sapience to the colorful causes of the failure situation experience along the road section through this disquisition, show that relative to pavement, base course, wearing course and sub base were to lower than the demand for effective functionality of the said road of case study. From the disquisition carryout, useful recommendation are made to ameliorate the design and proper ways of reducing the rate of failure in Nigerian roadways.

Preface

In construction of trace, generally the roads aren’t designed to last ever. It’s been designed to serve some purpose for a specific time. As it can be seen in engineering work, the life span of a road is always an important factor that must be taken into consideration as one of the criteria for the construction. This really depends on the factors like construction procedure and consideration, the soil water relationship, quality of workmanship during the construction and the type of conservation culture espoused.

numerous roads( Highway substantially) are seen extensively as attaining the state of failure and show signs of torture before the anticipated life span used for construction is reach, due to the lack of factors similar as lack of conservation cultureetc. numerous of our road moment serve as death trap and hang out for gangbangers going by the number of accident recorded daily on them as a result of bad paved road.

Pavement failure can be defined as the failure of the constructed subcaste of durable material of specified consistence, generally of concrete, asphalt or bituminous accoutrements assigned to carry wheeled vehicles. Due to the number of cargo passing through a pavement structure, some deviation of the face and underpinning layers do. The deviation can be as a result of the redundant cargo, poor material operation, and poor road foundation performing from the nature of the soil or groundwater rise in the area of high groundwaterlevel.However, repeated operations causes planing and cracking that eventually lead to failure of the pavement structure, If layers are lacking in strength.

The construction of the Eliozu- New Airport road, which was constructed a while agone , unforeseen failure due to indecorous disquisition of either the soil composition or business capacity situation in the said section of the road networking, lack of proper drainage to control the effect of rise in groundwater position. The pavement consistence of the road section as measure was about3.87 elevation(98.3 mm) and the range of the binary carriage way about7.9 m with no proper shoulder and drainage handed.

The trouble of put in controlling the rate of failure and provision for annually increase of business capacity has been a thing of burden to the government of the River State in particular and the Civil government in general. By questioning and observation, failure of the said Eliozu- New Airport road as it problem from compounded presence of water coming out at a particular points on the road face poor material and workmanship and pressure from adding business capacities on the road pavement of which the government is making provision for overhead ground which is presently in construction and it’s set up out that utmost at a point like Eliozu junction by ABC shuttle, the pavement bituminous material on the road have vanish.

Points And Ideal Of Study

The major ideal of this disquisition is to ascertain factors that likely lead to the failure of Eliozu- New Airport road in Obio/ AkporL.G.A. of River State in particular and Nigeria Highways in general and how it affect public stability and development. This design work stand at a point to unveil the veritably data behind why utmost of the roads fail soon after construction.

The count carryout will astronomically give information on the factual business volume and the capacity of business and will help in used for possible business planning and design.

It shall lead in proper construction of trace and remedy that will possible give a continuing result and reduction in road failures. The several test similar as test on asphalt, test on soil will handed better data to the cause of the failure of the case study.

Compass Of The Design Study

The whole section of the road was visited( Surveillance) and failure pattern noted.

The design compass includes

– Assessment of kind of failure and causes on the Eliozu- New Airport road.

– Soil samples collection and testing and analysis to determine thesub-grade,sub-base strength of the road foundation.

– Assessment of underground water position and its affect on the pavement.

– Assessment of business capacity intensity on the networking plan of the road and volume determination.

– Assessment of drainage condition and proper drainage provision.

– Assessment of the proportion and quantum of bitumen and finer used in the Asphalt admixture used for the face course.

– Bracket of the soil according to ASSHATO bracket system.

– Recitation of possible pavement torments that are set up along a road section.

Background Information Of The Study Area

The position of which this disquisition is been carryout is a road network located at Obio/ AkporL.G.A at the eschewal script of Port- Harcourt, River State. The road is from Eliozu junction to Airport road leading to Elele of which attention is lay on the Eliozu junction where ABC shuttle is, at where over head ground is witnessing construction presently to where the Eliozu- New field road cross with the field road.

Limitation Of The Study

This exploration was carried out under the limits of the available material and coffers. The work is centre on soil sample testing and bracket, asphalt testing and business volume and effect of groundwater on road bases.

The following factors hamper the prompt attainment of this design work.

– Lack of laboratory installations

– Cost of the design work

– Time closeness.