|Table of Contents|

Ground settlement monitoring above Xi'an Metro tunnel through the saturated soft loess(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第01期
Page:
96-103
Research Field:
地质工程
Publishing date:

Info

Title:
Ground settlement monitoring above Xi'an Metro tunnel through the saturated soft loess
Author(s):
HE Nong-nong1 LI Pan2 SHAO Sheng-jun2 LI Jia-kun2 JIAO Yang-yang2
1. Xi'an Metro Co. Ltd., Xi'an 710018, Shaanxi, China; 2. School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, Shaanxi, China
Keywords:
geological engineering tunnel Xi'an Metro settlement monitoring width of settling vessel loss ratio of stratum saturated soft loess
PACS:
P642.13+1; TU94
DOI:
-
Abstract:
The tunnel through the saturated soft loess from Chaoyangmen Station to Kangfulu Station in Line 1 of Xi'an Metro was taken as example; based on the local ground settlement deformation monitoring during the construction, the discipline of ground settlement deformation caused by the tunnel construction with shallow tunneling method under the special condition of saturated soft loess and the distribution of settling vessel were analyzed. The results showed that the ground settlement above the tunnel could be divided into little settlement, significant fast settlement, slow settlement and stable settlement stages when the excavation face went forward continuously, and the tunnel with saturated soft loess was excavated; the maximum settlement was 18.89 mm after single tunnel excavated and 36.4 mm after double tunnels excavated; the ground settlement of tunnel excavated secondly was large because of the disturbance of the tunnel excavated firstly to wall rock; the width of ground settling vessel of double tunnels was approximately twice of single tunnel, so the width of ground settling vessel of double tunnels approximated the sum of the width of ground settling vessel of single tunnel and the distance of axes midpoints between the double tunnels; the widths of ground settling vessel were 8.4-9.3 m after single tunnel excavated and 16.2-17.5 m after double tunnels excavated; the parameters of width of ground settling vessel were 0.435-0.467 after tunnel excavated, loss ratios of stratum were 0.765%-1.324% after single tunnel excavated and 1.231%-2.200% after double tunnels excavated.

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Last Update: 2012-03-20