Showing papers by "Fang-Le Peng published in 2019"
TL;DR: In this article, the authors employed the service replacement cost method (SRCM) framework, after shedding particular light on the theoretical interpretation of SRCM from the perspective of marginal value theory for non-market goods and modifying it into three major steps, to translate the external benefits of underground rail transit into monetary terms.
36 citations
TL;DR: In this article, the authors investigated the relationship between several candidate influential factors and the UUS distribution surrounding metro stations on two lines in Osaka, Japan and found that passenger flow rate and land price were highly related with UUS.
36 citations
TL;DR: In this paper, a sealing process based on the cryogenic freezing principle is proposed, which involves using liquid nitrogen as the working fluid to create a cryogenic environment, through which passing underground water would be frozen to creating a seal.
4 citations
29 Sep 2019
TL;DR: In this paper, the influence of ground settlements, overburden pressures, and bending moments in the tunnel lining was investigated by applying a systematic methodology that can randomly yield close approximation of morphology of rock blocks into commercial particle flow code PFC2D.
Abstract: Distinct from shield tunnelling in clayey and sandy strata, crushing undetected single isolated boulder by tunnelling machine frequently resulted in severe ground subsidence hazards (e.g., cave-in of ground). These ground subsidence usually happened suddenly with little warning, occurred few hours to few years post-tunnelling, and did not feature a continuous settlement trough curve like those of tunnelling in fine grained soils. In light of these, it is extremely difficult to predict potential ground subsidence hazards and then to adopt appropriate countermeasures or post-tunnelling remedial measures to prevent associated damages. By applying a systematic methodology that can randomly yield close approximation of morphology of rock blocks into commercial particle flow code PFC2D, the influence of boulder location on ground settlements, overburden pressures, and bending moments in the tunnel lining was investigated. The numerical simulations disclosed that the shape of ground settlements trough reflected the location of crushed boulder. In the meantime, crushing and removing the boulder would change earth pressure around the tunnel and thus caused the bending moments in the lining to redistribute.
1 citations