UNVEILING THE SUBTERRANEAN: A NUMERICAL ODYSSEY THROUGH TUNNEL EXCAVATION WITH ABAQUS

Abstract

The relentless pace of urbanization in China, accompanied by a surge in transportation infrastructure, has intensified the challenges of road traffic congestion. The concurrent development of urban underground facilities, particularly the rapid expansion of urban rail transit, has become a prominent aspect of addressing the escalating traffic concerns. By the close of 2020, an impressive 7,969.7 kilometers of rail transit operation lines were operational in 45 cities, with underground lines constituting a substantial 68.1% of the total length (Figure 1). As of 2021, this trend persisted, with subways commanding a remarkable 78.90% share in the urban rail and transportation operation lines across 9 systems. This paper aims to scrutinize the dynamic landscape of China's urban rail transit system, emphasizing the evolving role of underground lines in mitigating the challenges posed by increasing urbanization and transportation demands. The comprehensive analysis includes an exploration of the development trajectory, operational statistics, and the substantial contribution of subways to the overall urban transit network. The study delves into the implications of this substantial growth, considering the impact on urban mobility, environmental sustainability, and the broader urban landscape. The findings underscore the significance of underground rail transit in the Chinese urban context, not only as a solution to traffic congestion but also as a crucial component of sustainable urban development. As cities continue to grapple with the complexities of transportation management, understanding the patterns and implications of urban rail transit expansion becomes paramount for informed urban planning and policy decisions.