REHABILITATION OF KARASF-SOHREVARD ROAD, ZANJAN, IRAN (KSR-Z)

Factors

Description

Services

Engineering and Design, Construction Supervision

Name of Project

Rehabilitation of Karasf-Sohrevard Road

Employer / Client

IMIDRO

Contact Information of the Employer

Website address: imidro.gov.ir

Email: info@imidro.gov.ir

Phone No: 0098 2141868000

Contract Number

12657, 114660/1402

Type of Contract

Design and Build (DB)

Contract Duration

Ongoing

Date of Start

Jul 2022

Date of Finish

Ongoing

Duration of the Project

Ongoing

Key Project Characteristics

·         The axis measures 328+14 kilometers, undergoing renovation from kilometer 911.22+3 to kilometer 800+6, and rehabilitation from kilometer 500+6 to kilometer 139.77+11.

·         When designing the cross-sections for this project, the traffic volume for each axis was taken into consideration. It was decided to configure the section for renovating the route as a two-way line, with each line having a width of 3.6 meters. Additionally, for the rehabilitation section of the route, the decision was made to expand the width of the existing axis road from the west side.

·         Following the regulations for out-of-town roads, this route is classified as a collector and distributor road, with a maximum design speed of 80 kilometers per hour.

·         Traffic estimates were the basis for determining the appropriate pavement structure for the first 10 years of this project. It consists of 4 layers with the following specifications: a 15cm subbase layer, a 15cm base layer, and two layers of asphalt comprising 6cm binder and 4cm wearing course.

Challenges and Difficulties

·         Private land ownership

·         The incapacity to relocate the axis from its current position and the requirement to renovate the current route owing to social and economic consequences of altering and varying paths

Description of services

Studies:

·         The initial phase of the project involves comprehensive studies of traffic flow, road construction, geology, hydrology, and environmental impact.

·         This also includes the detailed design of plan, profile, and cross-section maps in various stages. Additionally, the estimation of traffic flow for the axis over the next 20 years will be carried out with a prediction of the necessary road construction designs for the axis.

·         Accompanying these studies is the preparation of assessment maps needed for land acquisition, as well as the creation of signage and safety maps designed to enhance the safety of both new and existing routes. Geometric corrections and the design of route intersections will also be addressed.

Supervision:

·         The supervision phase will encompass pre-construction oversight, along with technical and support supervision during the construction period. Furthermore, post-construction supervision will be provided to ensure project completion and guarantee its successful operation.

Solution to Overcome Obstacles

·         Optimizing the approach and method for improving road infrastructure

·         Modifying the design to align with future urban expansion plans along the corridor and in the cities along the route

·         Establishing the capability for the collective use of mining access roads as an integral aspect of national highway development

Achievements

·         Enhancement of traffic flow

·         Mitigation of heavy vehicle congestion and reduction of pass-through traffic within urban areas

·         Minimization of vehicular wear and tear

·         Enhanced accessibility and heightened operational efficiency within regional mining sites