Prediction of Road Construction and Vehicle Costs in Developing Countries.

Abaynayaka, S W; Rolt, J; Hide, H; Robinson, Richard; Trrl,

doi:10.1680/iicep.1977.3110

Cited by 13 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to the geological, geomorphological, geotechnical, road usage, design and construction inadequacies, and maintenance (Adegoke- Anthony and Agada, 1980;Ajayi, 1981). Abynayaka (1977) observed that natural factors such and rainfall and flooding can also result in road collapse, contrary to the opinion of the Transport Road Research Laboratory (1991). The temperature variations and acid rain impact on the base material of the road pavements in water-logged terrains, according to previous researchers (Nelson 1990),can deteriorate the sub-base of the road material through capillary action, causing a reduction in the support provided by the road pavement components.…”

Section: Introductionmentioning

confidence: 80%

Geotechnical Evaluation of the Causes of Road Pavement Failure Along the Mbaitoli-Ikeduru-Mbaise Highway, Southeastern Nigeria

Nwachukwu

Aleke²,

Aghamelu³

et al. 2022

TARCE

View full text Add to dashboard Cite

The incessant failed spots in the road pavement along the 27.61km Mbaitolu-Ikeduru-Ahiara Mbaise highway in Imo state, southeastern Nigeria, has necessitated this geotechnical study to evaluate the impact of the subgrade material quality on the road pavement failure. The study entailed both physical and geological assessment of the predominantly sandy to clayey silt Benin Formation underlying the area, as well as field and laboratory engineering tests on the subgrade materials underlying the road alignment. The engineering tests carried out included the grain size distribution, specific gravity, natural moisture content, Atterberg (liquid and plastic) limits, compaction (to determine maximum dry density and optimum moisture content), California bearing ratio (CBR), and shear strength (to determine cohesion and angle of internal friction). The engineering test results indicate that the natural moisture content values range between 10.4 and 18.9%, liquid limit between 36.0 and 48.6%, plastic limit ranges from 26.1 to 31.6, with corresponding plasticity index values that range from 9.2 to 17.0%. The grain size distribution test results connote the predominance of sand, with number of fines-sized particles that ranges from 22 to 38% and amount coarse to medium sand-sized particles ranging from 62 to 78%.Maximum dry density ranges from 1.29to 1.93 kg/m3. (CBR) ranges from 3.7 and 91.9%. Specific gravity ranges between 2.56and 2.61, while cohesion and angle of internal friction range from 39 to 42 kPa, and 14 to 20°, respectively. Some failed portion especially in Inyishi area were likely due to moisture fluctuation in the subgrade due to closeness of the water table. Proper compaction, chemical stabilization, and appropriate drainage would likely boost the efficiency of the subgrade material and the durability of the road pavement.

show abstract

Section: Introductionmentioning

confidence: 80%

Geotechnical Evaluation of the Causes of Road Pavement Failure Along the Mbaitoli-Ikeduru-Mbaise Highway, Southeastern Nigeria

Nwachukwu

Aleke²,

Aghamelu³

et al. 2022

TARCE

View full text Add to dashboard Cite

show abstract

“…In fact at rst, the seal restrained the researcher from probing into causes of the failure, until the permission was sought for this investigation. This type of highway failure is very common on Nigeria roads most especially in the sedimentary environment where excessive ooding, weathering, and erosion constantly usually erode the soft foundation soil (Abynayaka 1977). The state of the two failed segments has made travelling along road very unpleasant, armed robbers and kidnappers/unscrupulous people have made them their abode where criminal and nefarious activities are rising daily.…”

Section: Introductionmentioning

confidence: 99%

An investigation into erosion induced highway structural failure along Ifon – Benin Highway, Southwestern Nigeria

Olumuyiwa¹,

Adekunle²

2020

Nipp J Environ Sci

View full text Add to dashboard Cite

Geotechnical investigation was carried out at two failed segments along Ifon-Benin Highway, with the aim of determining cause, nature, and extent of the road failure. Eight in-situ cone penetration tests was carried out to a depth of about 20 m with a lateral spacing of 20 m. This was complemented by collection of eight soil samples at different depths within the failed segments and analyzed in the laboratory. The laboratory tests conducted were grain size analysis, Atterberg limit test, compaction test, California bearing ratio, undrained uncon ned triaxial test. The failure that existed in both locations are around the embankment, shoulder/edge and wearing course of the highway, due to ingression of water into the subgrade since the earth (natural soil) embankment structure had been eroded by rain water. The laboratory geotechnical results revealed that all the parameters could not meet up with the federal ministry of works and housing speci cation of Nigeria, with plasticity index greater than 20 %, % nes greater than 35 %, CBR values less than 80 % minimum recommended, shear strength parameters; angle of friction and cohesion are less than minimum of 30° and 50 kPa respectively. The CPT revealed predominant sandy silt to clayey silt topsoil and clay substratum with an inferred compressive strength of 20-40 KN/m 2. At both failed segments, the clayey substratum is seriously affected within the upper 6 m. The ingression of water into these foundation structures was due to compromise of the design/construction engineer, since a bridge was supposed to be erected across these two locations. Hence the stream channels across the highway were blocked by the earth-ll embankment. Therefore during wet season, pool of water that supposed to ow across the road through bridge system, continue to dissolve the embankment, and consequently in ltrate into the subgrade. This makes the highway to settle largely under tra c load. In addition, incessant heavy ooding around the embankment/shoulder of the highway might have induced the failure since a bridge was supposed to have been constructed across the two failed segments. This ooded water might have in ltrated into the pavement structural material leading to looseness, and less-cohesion of the layers which invariably reduces subgrade support and weakens various pavement layers.

show abstract

“…These are signs of pavement failure. Reference [8] established some major factors responsible for road failures which include: poor road construction, poor road design, excessive traffic axle load, high water table, wrong choice of construction materials, and collapse of drainage substructures. The transport road research laboratory [9] also argued that climatic factors can also affect the strength of the road structure.…”

Section: Introductionmentioning

confidence: 99%

Influence of Spatial Variation in Subgrade Properties on the Design of Highway Flexible Pavements

Madu¹

2016

AJASR

View full text Add to dashboard Cite

Abstract:Influence of spatial variation in subgrade properties on the integrity of highway pavement design is the burden of this research. Interruption, delay and discomfort in transportation flow that characterize roads across the globe due to poor pavement conditions are pathetic experiences. This work is an attempt to investigate the influence of subgrade variation on the design thicknesses of highway flexible pavements, using subgrade properties and traffic characteristics encountered along the Enugu-Onitsha expressway. Soil samples collected from selected sections of the expressway were subjected to geotechnical laboratory tests like particles size distribution, Atterberg's limits, compaction and California bearing ratio in order to analyse their properties. The results generated from these three samples from different stations across the road showed that the soil materials along the Enugu-Onitsha expressway vary significantly. Sample from Nkpor, Awkuzu and Kwata stations contain 15%, 45% and 80% fines (silt and clay) respectively, likewise their MDD and OMC are 1852KN/m 3 , 1980KN/m 3 and 1788KN/m 3 ; 11.7%, 11%, and 14.6% respectively. The 48 hour soaked CBR values of soil samples from Nkpor and Awkuzu stations are 8% and 9% respectively while Kwata station is 2.3%. The plasticity index and liquid limit results were also 11%; 31% and 9%; 27.4% for Awkuzu and Kwata samples while Nkpor sample in a non-plastic soil. Based on ASSHTO classification, the soils fall within A-2-4, A-6 and A-4 categories which depicted a significant variation in properties, fair to bad. Based on the design outputs for pavement thicknesses, it was concluded that designing a length of highway with a single CBR value will be uneconomical for areas with significantly higher surface modulus as well as providing insufficient thicknesses for areas with lower actual CBR than the observed. Sectional pavement design at not more than 1km intervals was recommended.

show abstract

Prediction of Road Construction and Vehicle Costs in Developing Countries.

Cited by 13 publications

References 0 publications

Geotechnical Evaluation of the Causes of Road Pavement Failure Along the Mbaitoli-Ikeduru-Mbaise Highway, Southeastern Nigeria

Geotechnical Evaluation of the Causes of Road Pavement Failure Along the Mbaitoli-Ikeduru-Mbaise Highway, Southeastern Nigeria

An investigation into erosion induced highway structural failure along Ifon – Benin Highway, Southwestern Nigeria

Influence of Spatial Variation in Subgrade Properties on the Design of Highway Flexible Pavements

Contact Info

Product

Resources

About