Optimization of Pile Reinforcement in Soft Soils: A Numerical Analysis
Source abstract
Abstract
To improve design rationality and deformation control of inclined-front, vertical-rear, double-row pile retaining structures in soft soil, we consider the foundation pit of the Xiantao Citizen Service Center, Hubei, China. We aim to numerically optimize pile reinforcement configuration in soft soil. Based on on-site measurements and finite element simulations, we study front pile angle, tie beam–soil interaction; range, depth, and elastic modulus of inter-pile soil reinforcement; pile displacement; bending moment; mechanical properties of pile displacement; pile displacement; bend moment; etc. We conclude that (1) inter-pile soil reinforcement strongly influences overall pile displacement, and the tie beam restricts local pile top displacement; (2) optimal deformation control is achieved when reinforcement depth is 1 to 1.5 times excavation depth; and (3) an elastic modulus of 200 to 300 MPa for reinforcement is best for displacement control. These results provide theoretical and practical guidance on parameter optimization and engineering design of similar soft-soil support structures.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geotechnical Engineering and Soil Stabilization · Geotechnical Engineering and Soil Mechanics · Geotechnical Engineering and Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China
Eighth Geological Brigade, Hubei Provincial Bureau of Geology, Xiangyang 441000, China
Wuhan Desgin and Research Institute Company Limited of China Coal Technology and Engineering Group, Wuhan 430064, China
Funding
the National Natural Science Foundation of China
References (42)
Show source-provided references
1. Method and application of deformation control of excavations in soft ground
2. Huang, J., Liu, J., Guo, K., Wu, C., Yang, S., Luo, M., and Lu, Y. (2024). Numerical Simulation Study on the Impact of Deep Foundation Pit Excavation on Adjacent Rail Transit Structures—A Case Study. Buildings, 14.10.3390/buildings14061853 ↗
3. Performance and environmental impacts of deep foundation excavation in soft soils: A field and modeling-based case study in Nanjing, China10.1016/j.undsp.2024.01.002 ↗
4. A multi-geophysical approach to assess potential sinkholes in an urban area10.1016/j.enggeo.2023.107100 ↗
5. Global analysis approach of stability of deep foundation pit slopes reinforced by underground diaphragm walls and prestressed anchor cables10.1016/j.compgeo.2023.105744 ↗
6. Suggested method of utilizing soil arching for optimizing the design of strutted excavations10.1016/j.tust.2023.105450 ↗
7. Wall and Ground Movements due to Deep Excavations in Shanghai Soft Soils10.1061/(ASCE)GT.1943-5606.0000299 ↗
8. Deformation of deep and large foundation pit in soft soil of Fuzhou Subway10.1007/s12517-019-4918-7 ↗
9. Numerical simulation of deep foundation pit dewatering and optimization of controlling land subsidence10.1016/j.enggeo.2010.05.002 ↗
10. Excavation and Support Analysis of Prefabricated Recyclable Double-Row Pile Supporting Structure
11. Deformation Characteristics of Double-row Pile in Deep Foundation Pit with Water-rich Circular Gravel Layer
12. Analysis on Forced Deformation of Double Row Piles Considering Pile-pile Interaction in Layered Foundation
13. Research on deformation control of double-row piles near metro deep foundation pit with deep silty sand layer
14. Application of precast concrete pipe piles in a deep excavation project
15. Evaluation of flexural stiffness on mechanical property of dual row retaining pile wall10.1080/15376494.2020.1800874 ↗
16. Model test and numerical simulation of a new prefabricated double-row piles retaining system in silty clay ground10.1016/j.undsp.2023.05.004 ↗
17. Application and analysis of double-row constant thickness steel cement-soil walls on a large-scale deep excavation
18. Lan, B., Wang, Y., and Wang, W. (2023). Review of the Double-Row Pile Supporting Structure and Its Force and Deformation Characteristics. Appl. Sci., 13.10.3390/app13137715 ↗
19. Three-dimensional numerical simulation and earth pressure analysis on double-row piles with consideration of spatial effects10.1631/jzus.A1100067 ↗
20. Research on spatial effect of double-row piles supporting structure for deep foundation pit
21. Numerical Analysis of Influence of Design Parameters on the Double-row Pile Support Structure of Deep Foundation Pit
22. Slope deformation and parameters sensitivity in the design of double-row supporting piles
23. Development of soil–pile interactions and failure mechanisms in a pile-reinforced landslide10.1016/j.enggeo.2021.106389 ↗
24. Performance of double-row piles retaining excavation beneath existing underground space
25. Dong, B., Wang, Q., Ma, F., Zhang, C., and Zou, L. (2023). Calculation Theory of Counterweight Double-Row Pile Support for Deep Foundation Pit in Reclamation Area and Influence Analysis of Core Pile Parameters. Sustainability, 15.10.3390/su15076184 ↗
26. Model test study on bearing characteristics of double-row piles based on reinforcement effect of soil around piles
27. Study on the applicability of a retaining wall using batter piles in clay10.1139/cgj-2014-0264 ↗
28. Working mechanism of inclined-vertical retaining piles in excavations
29. Simulation of Single-row Oblique Straight Alternate Piles in Soft Soil Foundation Pit Support
30. Numerical analyses of deformation of inclined pile-retained excavations
31. Numerical study on oblique-straight alternate piles for active support of excavations
32. Behaviors of double-row contiguous retaining piles with raking front-row piles under horizontal loads
33. Calculation and monitoring analysis of inclined precast pile foundation pit support in soft soil area of Hanjiang River terrace
34. Numerical Analysis on Force and Deformation of Composite Piles for Loess Foundation Pit Inclination
35. Field Experiment and Working Mechanism of Foundation Pit Excavation Retained by Front-row Inclined Double Row Piles in Soft Soil Area
36. Qiu, H., Zhou, Y., and Ayasrah, M.M. (2023). Impact Study of Deep Foundations Construction of Inclined and Straight Combined Support Piles on Adjacent Pile Foundations. Appl. Sci., 13.10.3390/app13031810 ↗
37. Numerical investigation of dual-row batter pile wall in deep excavation10.1080/15376494.2021.1965268 ↗
38. Application of the Hardening Soil model in deep excavation analysis10.1080/19373260.2012.696445 ↗
39. Zhao, Y., Lu, Z., Liu, J., Zhang, J., and Yao, H. (2023). Influence of different infill materials on the performance of geocell-reinforced cohesive soil beds. Sci. Rep., 13.10.1038/s41598-023-39580-x ↗
40. The hardening soil model: Formulation and verification
41. Numerical Simulation of Deep Foundation Pit Construction under Complex Site Conditions10.1155/2021/6669466 ↗
42. A simple estimation model for 3D braced excavation wall deflection10.1016/j.compgeo.2016.10.022 ↗