Abstract：
With large-scale construction of urban rail transit projects, many running tunnels will be constructed be?
neath existing railways, affecting the operation of these existing railways. Based on a running tunnel of the Yataidajie- Weihuanggong section on the Chuangchun light rail line 4, which passes under several existing railways at Changchun Railway Station, the interaction between vertical track deviation and subgrade settlement is studied using an empirical formula prediction and numerical simulation. A multivariate nonlinear regression method is proposed based on a single-factor analysis, and the partition criteria for adjacent influence zones is obtained based on vertical track deviation and subgrade settlement. It is proven that the controlling criteria based on vertical track deviation is stricter than other criteria, and corresponding construction classification parameters are set up regarding different influence zones. Finally, a dynamic construction adjustment method is put forward to ensure that running tunnel excavation under existing railways is done safely and efficiently.
ZHENG Yu-Chao- 1 Cai-Jia-Liang- 1 Yuan- Zhu- 2 Yang-Tian-Chun
.Partitioning of Adjacent Influence Zones and Construction Control Measures for Metro Tunnels Passing under Existing Railways[J] MODERN TUNNELLING TECHNOLOGY, 2016,V53(6): 202-209
2016, Vol. 53 