Effect of Foundation Pit Protective Facing Thickness on the Construction Stability of Open-Cut Underpass

DOI

10.2991/978-94-6463-473-0_12How to use a DOI?

Keywords

open-cut underpass; foundation pit support; numerical simulation; ground settlement

Abstract

To ensure the safety and stability during the construction process of open-cut underpass, this paper takes the Xinchun Road underpass project in Chongqing as the research background, adopts numerical calculation method to establish the “excavation of foundation pit-slope protection-structural construction-back filling” simulation model for the whole construction process. The deformation and force characteristics of different construction stages of soil and support system are analysed, to summarize and optimize the safety measures of the construction process of open-cut underpass. The research results show that: reasonable control of the slope rate can effectively control the plastic deformation of the surrounding rock in the stage of pit excavation. The thickness of foundation pit protective facing for the impact of the project is mainly embodied in the back filling stage. With the increase in the thickness of protective facing, the maximum deformation of the rock-soil mass in each direction has increased. The foundation pit protective facing for the safety and stability of the whole process of the construction of open-cut underpass is very limited. The design and construction should be strengthened to protect the key protection areas ensure the safety and stability of the whole process of the open-cut underpass. The results can provide optimisation ideas and design references for the protection of open-cut underground structures.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Huan Liu
AU  - Zheng Chen
AU  - Yuan Liu
PY  - 2024
DA  - 2024/08/22
TI  - Effect of Foundation Pit Protective Facing Thickness on the Construction Stability of Open-Cut Underpass
BT  - Proceedings of the 2024 3rd International Conference on Applied Mechanics and Engineering Structures (AMES 2024)
PB  - Atlantis Press
SP  - 109
EP  - 116
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-473-0_12
DO  - 10.2991/978-94-6463-473-0_12
ID  - Liu2024
ER  -