Pavement condition assessment using soft computing techniques
|نوع نگارش مقاله||
scopus – master journals – JCR
۴٫۲۷۶ در سال ۲۰۲۰
۲۶ در سال ۲۰۲۱
۰٫۹۰۱ در سال ۲۰۲۰
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Q1 در سال ۲۰۲۰
خرید محصول توسط کلیه کارت های شتاب امکان پذیر است و بلافاصله پس از خرید، لینک دانلود محصول در اختیار شما قرار خواهد گرفت و هر گونه فروش در سایت های دیگر قابل پیگیری خواهد بود.
فهرست مطالب مقاله:
Pavement condition assessment using soft computing techniques
Roads are the lifeline of a nation which provides a reliable and easy access to diﬀerent areas across the country. Once the roads are constructed, their condition goes on deteriorating with time. Therefore, implementing periodic pavement maintenance is equally impor- tant as that of construction for the satisfactory performance throughout their design life. This study develops an approach for pavement condition assessment and their prioritization which can be dealt with a variety of performance indicators for evaluating diﬀerent aspects of pavement performance. Pavement stretches with low ratings will have a high probability to be scheduled for maintenance and reha- bilitation, depending on the availability of funds and the importance of roads.
This paper presents two approaches of fuzzy mathematical analysis to conceive strategic planning for maintenance and rehabilitation
of pavements. The pavement deterioration condition has been marked by four performance indicators: (a) International Roughness
Index (IRI) (b) Surface Modulus (Eo) (c) Rut depth (R) and (d) Friction Coeﬃcient (f). A methodology has been framed to assess con-
dition of Pradhan Mantri Gramin Sadak Yojna (PMGSY) all weather roads located in Jhunjhunu district of Rajasthan, India. These
stretches have been prioritized on the basis of their performance parameters using two soft computing techniques: (a) Fuzzy Analytical
Hierarchy Process (FAHP) and (b) Fuzzy Weighted Average (FWA) method.
The results clearly demonstrate that FAHP being more scientiﬁc approach can be considered as a base model for assessing the pave-
ment condition, however to have sound decisions, results so obtained are compared eﬀectively from FWA method.
|بخشی از متن مقاله:|
Accessibility in rural areas plays an important role in poverty eradication and overall socio-economic develop- ment. Thus, the need for road connectivity has been con- sidered vital in the developing countries having vast rural population. In India, traditionally the construction of rural roads has been the responsibility of the provincial govern- ments and thus the progress of construction of quality
roads was rather slow and the existing roads were also not being maintained in the absence of adequate funding. Thus, in year 2000, the Government of India (GoI) launched a nationwide fully centrally sponsored rural road development scheme, popularly known as Pradhan Mantri Gramin Sadak Yojna (PMGSY). The main objective of this scheme was to provide connectivity through all- weather roads to rural areas so that overall development can be ensured at local, regional and national levels. The PMGSY scheme was designed so as to ensure that a new road constructed would be maintained by the contractor for the ﬁrst ﬁve years. Most of the rural roads constructed during the ﬁrst few years after the inception of the project are quite old now and in the absence of proper maintenance are showing distresses of various magnitudes. The Government of India has stressed the need of maintenance and rehabilitation of rural pavements in the 12th ﬁve-year plan. Thus, there is a need to develop a pavement mainte- nance management system for PMGSY roads that could be used as a tool for allocation of funds at the local govern- ment level. The present paper discusses about a case study carried out in Jhunjhunu district of Rajasthan state in India with an aim of prioritizing a few selected PMGSY roads on the basis of their current conditions based on extent and severity of visible distresses. The major chal- lenge in pavement maintenance work is the allocation of suﬃcient funds for these pavements on the basis of their factual conditions at appropriate time by the government . The most practical and economical approach for the maintenance of rural roads is to collect pavement condi- tions by visual inspection survey. Various distresses are recorded in terms of extent and severity and then prioritize the stretches depending on the overall condition. While standard templates are available for rating diﬀerent dis- tresses, still there are possibilities of variation in human judgements. The objective of this paper is to illustrate how the fuzzy approach could be eﬀectively used to mitigate these variations and develop a tool that would prioritize the road stretches on the basis of overall conditions and then help to take optimal funding allocation decisions. The pavement characteristics in this case study have been quantiﬁed, by physical means, rather than by having simple qualitative assessments and utmost care has been taken to obtain precise data. Once the requisite data are collected, they have been analysed using fuzzy approaches i.e. FAHP and FWA method.
The road users are mainly concerned in the functional performance of the pavement, which is expressed by rough- ness and surface friction. The implementing agencies on the other hand are focused on structural performance and dis- tress on the pavement surface. In Pavement Condition Assessment (PCA) the main steps involved are to evaluate the current pavement condition in terms of distresses, determine the rates of deterioration and project the future conditions. The various indicators to deﬁne the current condition of the pavement are determined on the basis of structural, functional, safety performances. The structural performance is measured mainly by non-destructive tests such as Benkelman Beam deﬂection measurement or falling weight and Light Weight deﬂectometers. The functional performance is measured using Bump Integrator which is then represented by International Roughness Index (IRI). It can also be determined by manual inspection survey by observing the severity and extent of distresses such as cracking, rutting, potholes, shoving, ravelling, bleeding, edge cracking and other visible distresses. The safety per- formance is measured in terms of surface resistance and skid resistance equipment is usually used to measure it. However, all these pavement evaluation techniques may not be used in each study as it depends on the scope of the work, availability of time and resources .
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