Analysis of Super-large Deep Foundation Pit Support and Monitoring Results in Sewage Plant

DOI

10.2991/978-94-6463-398-6_37How to use a DOI?

Keywords

deep foundation pit; anchor cable axial force; surface settlement; foundation pit monitoring

Abstract

In order to study the effect of construction sequence of anchor cable on the stability of deep foundation pit, Taking the ultra-large deep foundation pit project of Zhong you-fang Sewage Treatment Plant in Hefei City as the background, based on the geological and surrounding environmental conditions and the foundation pit support plan, the supporting structure and surrounding environment during the foundation pit excavation process were monitored and analyzed. The results show that the super-large deep foundation pit support structure has obvious spatial effects. The greater the excavation depth, the more obvious the spatial effect. As the construction proceeds, the axial force of the anchor cables of each layer gradually increases, among which the axial force of the anchor cables of the first layer increases. The force is generally greater than the axial force of the anchor cables on the second and third layers. The average axial force of the anchor cables on the first layer is 6.7kN, which is 67.3% of the design value. Since the axial force of the anchor cables on the second and third layers is not fully utilized, In addition, if water leakage or sand leakage occurs during the construction process, emergency dewatering measures outside the pit must be taken. Although the normal construction of the anchor cables can be ensured, it will have a serious impact on the roads surrounding the foundation pit. During the dewatering period, the maximum settlement of the road outside the pit reached 8mm, accounting for 10% of the total. 86.2% of settlement. The research results can provide reference for similar foundation pit anchor cable construction.

Copyright

© 2024 The Author(s)

Open Access

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TY  - CONF
AU  - Shiquan Wei
AU  - Wenjie Deng
AU  - Qianzheng Kai
AU  - Huanbao Peng
PY  - 2024
DA  - 2024/04/24
TI  - Analysis of Super-large Deep Foundation Pit Support and Monitoring Results in Sewage Plant
BT  - Proceedings of the 2023 5th International Conference on Hydraulic, Civil and Construction Engineering (HCCE 2023)
PB  - Atlantis Press
SP  - 377
EP  - 392
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-398-6_37
DO  - 10.2991/978-94-6463-398-6_37
ID  - Wei2024
ER  -