Measurement Research on Long-term Deformation Law of Operating Metro Shield Tunnel in Soft Soil Area
- DOI
- 10.2991/icmce-14.2014.62How to use a DOI?
- Keywords
- Soft Soil Area, Operating Subway, Straight Joint, Shield Tunnel, Long-term Settlement Deformation
- Abstract
To operating subway shield tunnel with straight joint in soft soil area as analysis object, with statistical analysis of seven-year elevation and settlement data, and introduction of per meter elevation difference and per meter settlement difference, systematic research on the distribution and long-term law of the tunnel have been done. The study shows that, the elevation data curve characteristics is very important to judge the longitudinal deformation characteristics of operating tunnel. At the beginning of operation period, tunnel settlement is faster. With increasing time, the average monthly settlement decreases gradually. For a whole line, the average monthly settlement value of the tunnel is between-2mm and 2mm. The tunnel settlement is approximately linearly proportional to the formation compression deformation and groundwater level. With groundwater level rising, the average monthly settlement of operational tunnel decreases gradually, and vice versa. The longitudinal deformation curve of each tunnel is approximately Gaussian curve. The symmetric center is approximately connected aisle. After operating seven years, the per meter settlement difference value is less than 1 mm and the annual variation value is less than 0.15 mm in a whole line.
- Copyright
- © 2014, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Ming-Yu LI AU - Li-Guang SUN AU - Yan-Wei ZHANG AU - Li-Bo ZHANG PY - 2014/12 DA - 2014/12 TI - Measurement Research on Long-term Deformation Law of Operating Metro Shield Tunnel in Soft Soil Area BT - Proceedings of the 2014 International Conference on Mechanics and Civil Engineering PB - Atlantis Press SP - 364 EP - 368 SN - 2352-5401 UR - https://doi.org/10.2991/icmce-14.2014.62 DO - 10.2991/icmce-14.2014.62 ID - LI2014/12 ER -