Determination of the Influence of the Disturbance Caused by Traversing Cross-Type Deep Foundation Pit Excavations

Shuhong Wang, Bo Yang (), Furui Dong, Marinichev Maxim and Ze Zhang
Additional contact information
Shuhong Wang: School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China
Bo Yang: School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China
Furui Dong: School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China
Marinichev Maxim: Kuban State Agrarian University (KubSAU), 13 Kalinina Str., 350044 Krasnodar, Russia
Ze Zhang: School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China

Sustainability, 2023, vol. 15, issue 2, 1-22

Abstract: Accurately recognizing the influence of excavation disturbance on the traversing cross-type deep foundation pit of the subway, determining the active range of the disturbance, and reasonably arranging the structure within its range can effectively ensure the safety of the project and save resources to achieve the goal of sustainable development. A three-dimensional model was established using the soil small strain hardening model to examine the subway deep foundation pit project in the CBD (central business district) core area of Fuzhou Coastal New City, where the soil is mainly soft soil with high natural water content, high compressibility, and weak permeability. The model was verified against the theoretical solution of Melan, and the deformation characteristics of the cross-asymmetric foundation pit excavation were analyzed. The results show that, due to repeated disturbance from excavation and unloading between the foundation pits, the soil arching effect, and changes in the boundary conditions, the structure at the intersection and the surrounding soil interact. The horizontal displacement of the retaining structure and the surrounding surface settlement are quite different from those observed from a single foundation pit excavation. For instance, the maximum horizontal displacement of profile 1-3 in Zone I decreases by 26.1%, while the maximum horizontal displacement of profile 1-1 in Zone II increases by 20.4%, and the maximum surface settlement around the profiles also has similar characteristics. The disturbance on the retaining structure and soil in different areas at the intersection can be divided into positive and negative effects. The active range of the “disturbance influence zone” is determined: the foundation pit of Metro Line 6 is 3.5 He and the foundation pit of Metro Line F1 is 3.0 He. Finally, the influence of changes in the groundwater level on the active range of the “disturbance influence zone” is discussed.

Keywords: traversing cross-type deep foundation pit; the hardening strain model with small strain; cross position; disturbance influence; active range (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/2/1130/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/2/1130/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:2:p:1130-:d:1027864

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().