Geological control on highway pavement performance in Southwestern Nigeria - a preliminary report

1990 ◽  
Vol 27 (1) ◽  
pp. 35
Keyword(s):  
Preliminary Report ◽  
Pavement Performance ◽  
Southwestern Nigeria ◽  
Geological Control ◽  
Highway Pavement

scholarly journals Highway Performance Evaluation Index in Semiarid Climate Region Based on Fuzzy Mathematics

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Sanqiang Yang ◽  
Meng Guo ◽  
Xinlei Liu ◽  
Pidong Wang ◽  
Qian Li ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Pavement Design ◽  
Pavement Performance ◽  
Fuzzy Mathematics ◽  
Accurate Evaluation ◽  
Multi Index ◽  
Climate Region ◽  
Design Scheme ◽  
Semiarid Climate ◽  
Highway Pavement

Accurate evaluation and analysis of expressway pavement performance is a prerequisite for determining the pavement design scheme and maintenance scheme. Due to the fuzziness and randomness of many factors affecting the pavement performance, this paper relies on the reconstruction and expansion project of Xinglin section of the Taihang mountain expressway, a method of highway pavement performance evaluation based on fuzzy mathematics is proposed. The results show the following: ① the study uses the factor domain, the comment level domain, the fuzzy relationship matrix, the evaluation factor full vector, and the fuzzy comprehensive evaluation result vector five-step method. The method can be effectively combined with the multi-index comprehensive detection index used in the specification. ② Based on the multi-index comprehensive test and evaluation adopted in the specification, the performance grade of the old road surface was quantitatively evaluated by the iterative calculation of fuzzy mathematics that broke through the evaluation mode which was based on the traditional detection methods. The research results provide innovative theoretical methods for the accurate evaluation and analysis of highway pavement performance in the semiarid climate region and also play a technical supporting role for the pavement design scheme and maintenance scheme decision-making in the semiarid climate region.

Obtaining Suction Distribution Within Vadose Zone of Highway Pavement System in Southwestern Nigeria Using Physico-Empirical Approach

2021 ◽  
Author(s):  
Moruffdeen Adedapo Adabanija ◽  
Abel Idowu Olayinka ◽  
Olawale Olakunle Osinowo ◽  
Abdulquadri Tayo Junaid ◽  
Isiah Olufemi Adebayo
Keyword(s):  
Vadose Zone ◽  
Empirical Approach ◽  
Southwestern Nigeria ◽  
Highway Pavement

scholarly journals Application of geophysical approach to highway pavement failure: a case study from basement complex terrain southwestern Nigeria

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Charles I. Adenika ◽  
Emmanuel A. Ariyibi ◽  
Musa O. Awoyemi ◽  
Adebiyi S. Adebayo ◽  
Oluwaseyi A. Dasho ◽  
...  
Keyword(s):  
Complex Terrain ◽  
Basement Complex ◽  
Southwestern Nigeria ◽  
Highway Pavement

scholarly journals Land satellite imagery and integrated geophysical investigations of highway pavement instability in southwestern Nigeria

2020 ◽  
Vol 46 (2) ◽  
pp. 135
Author(s):  
Omowumi Ademila ◽  
Abel Idowu Olayinka ◽  
Michael Adeyinka Oladunjoye
Keyword(s):  
High Resistivity ◽  
African Countries ◽  
Geophysical Investigation ◽  
Clayey Sand ◽  
Engineering Structures ◽  
Southwestern Nigeria ◽  
Near Surface ◽  
Subgrade Soils ◽  
Geophysical Investigations ◽  
Highway Pavement

The high global numbers of road accidents due to bad roads and the failure of other engineering structures have necessitated this study, particularly as road transport accounts for a higher percentage of cargo movement in African countries. The geophysical investigation was carried out on six failed and two stable sections along the Ibadan-Iwo-Osogbo highway to examine the geological factors responsible for highway failure in the area. A Landsat ETM+ (Enhanced Thematic Mapper Plus) imagery of the study area and its environs was acquired and processed for lineaments analyses. Magnetic, Very Low Frequency Electromagnetic (VLF-EM) and electrical resistivity methods involving Schlumberger Vertical Electrical Sounding (VES) and 2-D imaging using a dipole- dipole array were utilized. Lineaments were identified across failed localities. Lateral magnetic variations in the near-surface geological materials characterized the study area. The 2-D VLF-EM models generated showed conductive zones corresponding to fractured zones of conductive clay materials within the basement rocks. Subgrade soils below the highway pavement along the failed sections are typical of incompetent clayey and sandy clay/clayey sand formations with resistivity values between 20–475 Ω∙m. In comparison, the subgrade soil beneath the stable sections has moderate to high resistivity values of 196–616 Ω∙m. 2-D resistivity structures across the failed segments identified low resistivity water-absorbing clay and lithological contacts. Water absorbing, clay enriched subgrade soils and the identified near-surface linear conductive features are the major geologic factors, and poor drainage network resulted in the highway failure. Remote sensing and geophysical investigations of the geological sequence and structures underlying the highway should be carried out before construction to effectively complement the routine geotechnical studies to ensure the sustainability of road  nfrastructure.

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