Detailed engineering survey, design and cost estimation of naichal-aashapuri road (4+362km)

Abstract

The project, �Detailed Engineering Survey, Design, and Cost Estimation of Naichal� Aashapuri Road(4+362km)� focuses on expansion of existing road that enhances connectivity. To achieve this, a Real-Time Kinematic (RTK) survey was conducted alongside a total station survey. A topographic map was generated in AutoCAD using SW DTM. The key aspects of proposed road include geometric parameters like design speed of 30km/hr, minimum radius of horizontal curve 20m, gradient up to 10% and design traffic of 9640 ESAL. The project also incorporates pavement design in which flexible pavement has been found suitable throughout our alignment and this was designed as per Guidelines for the Design of Flexible Pavement 2014 (2nd Revision, 2021) after performing a CBR test in the laboratory. On the other hand, in hairpin bend areas rigid pavement were designed for safety measures. Some comparative studies were done using other method of flexible pavement design. Hill road presented unique challenges regarding stability of slopes. To encounter this, we have employed retaining structures including Gabion Retaining Wall, Masonry Retaining Wall, Masonry Breast Wall and Skin Breast Wall. The road�s plan and profile, along with cross-sections at 10-meter intervals and retaining structures were designed in SW Road Finally, a quantity and cost estimation were conducted to complete the proposed project using SW road software with reference to district rate. Cost optimization was another challenge. The total estimated cost of the proposed was found out to be Rs. 225,228,053.32 and the per km cost being Rs 51,634,125.02. The masonry for the structures occupied the major portion of the estimated cost.