A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Correlating EPB Chengdu Metro Settlement Data with Analysis Predictions in Sandy Cobble Stratum
Construction in urban areas, e.g., excavation, can generate negative impacts on the foundations of surrounding structures. In this study, based on the surface subsidence measurements due to earth pressure balance shield (EPB shield) tunneling in Chengdu Metro, displacement back-analysis was conducted for a typical cross section using the Peck formula and the stochastic medium theory. The engineering properties of a sandy cobble stratum in the Chengdu area, the settlement trough width (i), stratum loss rate (η), settlement trough effecting angle (β), and cross section contract value (ΔR) were analyzed statistically, and the ranges of these parameters under normal working conditions were corrected as: for the stochastic medium theory, tanβ=1, ΔR=16mm (lower limit), and tanβ=1, ΔR=5mm (upper limit); and for the Peck formula, k=0.3, η=0.9% (lower limit), and k=0.6, η=0.3% (upper limit). Comparison of the Peck formula and the stochastic medium theory formula, although composition and principle differ, show that the two methods can both be applied to the prediction of surface subsidence caused by tunnel excavation of sandy cobble formation through statistical experience, parametric inversion, and example verification.
Correlating EPB Chengdu Metro Settlement Data with Analysis Predictions in Sandy Cobble Stratum
Construction in urban areas, e.g., excavation, can generate negative impacts on the foundations of surrounding structures. In this study, based on the surface subsidence measurements due to earth pressure balance shield (EPB shield) tunneling in Chengdu Metro, displacement back-analysis was conducted for a typical cross section using the Peck formula and the stochastic medium theory. The engineering properties of a sandy cobble stratum in the Chengdu area, the settlement trough width (i), stratum loss rate (η), settlement trough effecting angle (β), and cross section contract value (ΔR) were analyzed statistically, and the ranges of these parameters under normal working conditions were corrected as: for the stochastic medium theory, tanβ=1, ΔR=16mm (lower limit), and tanβ=1, ΔR=5mm (upper limit); and for the Peck formula, k=0.3, η=0.9% (lower limit), and k=0.6, η=0.3% (upper limit). Comparison of the Peck formula and the stochastic medium theory formula, although composition and principle differ, show that the two methods can both be applied to the prediction of surface subsidence caused by tunnel excavation of sandy cobble formation through statistical experience, parametric inversion, and example verification.
Correlating EPB Chengdu Metro Settlement Data with Analysis Predictions in Sandy Cobble Stratum
Liao, Xin (author) / Wang, Qingfeng (author) / Feng, Liang (author) / Wu, Xiyong (author) / Guo, Deping (author) / Xi, Yingwei (author) / Chen, Jiannan (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 287-296
2019-03-21
Conference paper
Electronic Resource
English
Correlating EPB Chengdu Metro Settlement Data with Analysis Predictions in Sandy Cobble Stratum
| British Library Conference Proceedings | 2019
Prediction of subsurface settlement induced by shield tunnelling in sandy cobble stratum
| DOAJ | 2024
Prediction of subsurface settlement induced by shield tunnelling in sandy cobble stratum
| Elsevier | 2024
Face Stability Analysis of Shield Tunneling in Sandy Cobble Stratum
| British Library Online Contents | 2012