火山灰に覆われたアスファルト路面における車両走行性について

Abstract

The most famous and tallest volcano in Japan is Mt. Fuji. If the volcano erupts, volcanic ash accumulates on pavements and affects to travelling of vehicles, such as causing them to slip and get stuck. Therefore, we collected data by driving over volcanic ash spread on paved roads with a vehicle equipped with instruments that can measure the force applied to the running tires. We used three types of volcanic ash with different grain sizes and cover thickness. The experiments were conducted at constant speeds of 10 to 40 km/h and at rapid acceleration and deceleration. Data were collected not only on flat straight roads but also on curved roads with a radius of 30 m. From these data, the characteristics of rolling resistance, driving force, and side force on an ash-fall road surface can be obtained. This paper presents the driving roads on which the experiments were conducted and the effects of volcanic ash on driving by processing the tire data obtained. As the rolling resistance increases according by thickness of the volcanic ash increases, but as the driving speed increases, the rolling resistance tends to decrease.