Method for Calculating Vertical Compression Bearing Capacity of the Static Drill Rooted Nodular Pile
Source abstract
Abstract
The static drill rooted nodular (SDRN) pile is a new kind of composite pile foundation made by inserting a precast nodular pile into the cemented soil. Based on the tests and analysis on the mechanism characteristics of these two kinds of interfaces, which are between the pile and cemented soil, and between the cemented soil and soil, this paper proposes a calculation method for the ultimate vertical bearing capability of the SDRN pile considering two failure modes. When the precast pile and surrounding cemented soil fails as a whole, the diameter of the cemented soil pile is taken to calculate the ultimate shaft resistance, and the shaft resistance of the SDRN pile is about 1.05∼1.10 times that of the bored pile in the same soil layer. When the core precast pile fails in penetration mode, the diameter of the core pile is taken. The pile shaft resistance takes that of displacement piles in the same soil layer. The lower nodular pile shaft resistance should consider the squeezing effect of nodular joints. Besides, the improvement of pile tip resistance due to the expanded cemented soil should also be taken into consideration. The result is the smaller value calculated according to these two failure modes. The ultimate bearing capacity of a SDRN pile calculated by the theoretical method is not only compared with the field test result, but also the simulation result of a 2D model pile built by PLAXIS finite element software. In addition, the finite element simulation is also confirmed to be an effective way to investigate the mechanism characteristics of SDRN piles more thoroughly.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geotechnical Engineering and Soil Mechanics · Geotechnical Engineering and Soil Stabilization · Geotechnical Engineering and Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Jiang Su Jiao Shui Jian Intelligent Equipment Research Institute, Nanjing 211500, China
School of Civil Engineering, Southeast University, Nanjing 211189, China
Nanjing Iron & Steel United Co., Ltd., Nanjing 211500, China
Funding
National Natural Science Foundation of China
References (29)
Show source-provided references
1. Xu, L. (2015). Research on the Bearing Capacity and One Dimension Wave Characteristic of Static Drill Rooted Nodular Piles. [Ph.D. Thesis, Zhejiang University].
2. Qiong, Y. (2015). Research on the Vertical Compression Bearing Capacity of Static Drill Rooted Nodular Piles. [Ph.D. Thesis, Zhejiang University].
3. Zhou, J. (2015). Tests and Numerical Simulation on the Bearing Capacity and Settlement of Static Drill Rooted Nodular Piles. [Ph.D. Thesis, Zhejiang University].
4. Qian, Z. (2015). Experimental Study and Numerical Analysis of Bearing Capacity of Static Drill Rooted Nodular Piles. [Ph.D. Thesis, Zhejiang University].
5. Yang, M. (2013). Research on the Compression and Uplift Bearing Capacity of Drill Rooted Grouting Nodular Piles. [Ph.D. Thesis, Zhejiang University].
6. Bearing capacity and load transfer mechanism of static drill rooted nodular piles
7. Performance of static drill rooted nodular piles under compression
8. Analysis of Bearing Characteristics of the Static Drill Rooted Nodular Piles under Tension and Compression
9. Analysis of Bearing Characteristics of the Static Drill Rooted Nodular Piles under Tension and Compression
10. Gong, P. (2004). Load Transfer Mechanism of Concrete-Cored DCM Pile. [Ph.D. Thesis, Chinese Academy of Sciences].
11. Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas10.1631/jzus.A1300139 ↗
12. Zhang, R., Chen, H., Wu, L., Li, W., and Wang, S. (2011). Technical Specification for Static Drill Rooted Nodular Piles, Ningbo Zhedong Foundation Engineering Corporation.
13. Deng, Y., Peng, X., Hu, M., Wang, A., Xu, B., Qian, Y., Lu, H., Wang, J., Hua, M., and Wei, J. (2013). Technical Specification for Strength Composite Piles, Construction Office of Jiangsu Province.
14. Tang, Y., Zhang, X., Cui, J., Han, S., Yang, G., Xue, H., Miao, Q., Yang, S., Li, X., and Zhang, G. (2006). Technical Specification of Cast-in-Place Piles with Branches and Plates, China Construction Industry Press.
15. Test of model piles with branches and plates in unsaturated silty clay
16. Application of static drill rooted precast nodular pile in soft soil foundation and calculation for bearing capacity
17. Huang, Q., Jin, L., Gao, W., Jin, B., Sha, Z., Hou, W., Qiu, M., Gu, X., Chun, L., and Gu, G. (2008). Technical Code for Building Pile Foundation, China Construction Industry Press.
18. Chen, F., Xu, T., Zhu, G., Zhong, D., Liu, M., Liu, J., Ye, W., Teng, Y., Li, D., and Liu, Y. (2014). Technical Code for Testing of Building Foundation Piles, China Construction Industry Press.
19. Gong, W., Xue, G., Dai, G., Tong, X., and Mu, B. (2009). Static Loading Test of Foundation Pile—Self-Balanced Method, China Communications Press.
20. Gong, W., Mao, L., Gao, Q., Xue, G., Dai, G., Tong, X., and Mu, B. (2020). Technical Specification for Static Load Testing of Self-Balanced Method of Foundation Pile, Jiangsu Science and Technology Press.
21. Bearing response of skirted foundation on nonhomogeneous soil10.1061/(ASCE)1090-0241(1999)125:11(924) ↗
22. Reliability-based analysis of braced excavation in unsaturated soils considering conditional spatial variability10.1016/j.compgeo.2019.103163 ↗
23. Stochastic analysis of piled-raft foundations using the random finite-element method10.1061/(ASCE)GM.1943-5622.0001966 ↗
24. Influence Zone for End Bearing of Piles in Sand10.1061/(ASCE)1090-0241(2006)132:9(1229) ↗
25. Analysis of soil resistance on laterally loaded piles based on 3D soil–pile interaction10.1016/j.compgeo.2010.12.001 ↗
26. Three-dimensional FEM analysis of bridge pile group settlement in soft soils
27. Modeling the Behavior of Axially and Laterally Loaded Pile with a Contact Model
28. Side friction of drilled piles in cobble layers
29. Xie, C. (2018). Numerical study on behavior of pre-bored grouting plated nodular pile under compressive and tension. [Ph.D. Thesis, Zhejiang University].