Pile Foundation Analysis and Design

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 5736

Special Issue Editors


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Guest Editor
School of Civil Engineering, Fujian University of Technology, Fuzhou 350118, China
Interests: pile foundation; ground improvement; geotechnical testing; pile dynamics; earthquake engineering; soil dynamics
College of Civil and Transportation Engineering, Hohai University, Nanjing 210024, China
Interests: fractional plasticity; fractional viscoelasticity; fractals in particle breakage; geomechanics; heat conduction
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Special Issue Information

Dear Colleagues,

Pile foundations have been widely used to transfer large loads from superstructures to competent soil layers. During the long process of exploration and practice, the types and techniques of pile foundations have seen huge progress. In recent decades, the emergence of new materials, new machinery and new techniques have facilitated the leap forward in the development of pile foundation, and the design theory and engineering analysis of pile foundations have also made great strides.

This Special Issue aims to focus on knowledge of analysis and design of pile foundations. Topics of interest for this Special Issue include, but are not limited to: overview of pile foundations; theoretical and experimental research on pile foundation; engineering design research and practice of pile foundation; construction technology and quality control of pile foundation; pile foundation engineering in special soil; accident handling and typical cases in pile foundation engineering; pile detection and pile risk assessment; technology-standards-related issues of pile foundation engineering; new types of pile foundation; and piles of new material.

Dr. Changjie Zheng
Dr. Yifei Sun
Guest Editors

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Keywords

  • single piles
  • pile groups
  • settlement
  • bearing capacity
  • pile dynamics
  • pile-soil interaction
  • load transfer
  • pile integrity testing
  • engineering design
  • pile driving
  • pile risk assessment
  • new material
  • construction technology
  • quality control
  • aseismic design
  • precast pile
  • composite pile foundation
  • soft soil

Published Papers (4 papers)

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Research

18 pages, 7922 KiB  
Article
A Study on the Load-Bearing Characteristics and Load Transfer Mechanism of Bag Grouting Pile in Soft Soil Areas
by Fei Meng and Yipu Peng
Appl. Sci. 2023, 13(20), 11167; https://doi.org/10.3390/app132011167 - 11 Oct 2023
Viewed by 713
Abstract
In soft soil areas, to compare the load-bearing characteristics of bag grouting piles and cement mixing piles and study the load-bearing mechanism of bag grouting piles, field tests are conducted in this study, including the comparative compressive test of bag grouting piles and [...] Read more.
In soft soil areas, to compare the load-bearing characteristics of bag grouting piles and cement mixing piles and study the load-bearing mechanism of bag grouting piles, field tests are conducted in this study, including the comparative compressive test of bag grouting piles and cement mixing piles, and the analysis of pile axial force, pile side friction resistance, and pile end resistance. Moreover, a numerical simulation is developed using ABAQUS 2020 (finite element analysis software) for three-dimensional modeling. The numerical simulation results are compared with the field test results to verify the reliability of the numerical simulation. Furthermore, the influences of five factors are studied; namely, pile length, pile diameter, pile spacing, the thickness of the bedding layer, and grouting pressure are studied for their effects on the compressive bearing characteristics of the bag grouting pile. The results show the following: (1) For composite foundations, bag grouting piles are more effective than cement mixing piles in soft soil areas, and the former provide an 8.8% increase in the bearing characteristics. (2) With an increase in the load, the bag grouting pile experiences greater compression in the middle of the pile body, and the pile side friction resistance is increased; therefore, the pile side friction resistance can be fully developed, and the bag grouting piles have the ability to transfer the load from the top of the pile to the soil at the bottom of the pile. (3) When the external load is maximized, the sharing ratio of pile side friction resistance reaches 96.3%, which shows the excellent frictional performance of bag grouting piles. (4) Among the five factors mentioned above, the most important one is the pile diameter, followed by the pile length and pile spacing, the thickness of the bedding layer, and finally the grouting pressure. The optimal combination in this paper is a pile length of 18 m, pile diameter of 0.4 m, pile spacing of 1.0 m, bedding thickness of 0.3 m, and grouting pressure of 0.6 MPa. Therefore, changing the pile diameter can be given priority during the construction design. The findings in this paper can provide valuable insights and practical experience for the design of similar engineering projects. Full article
(This article belongs to the Special Issue Pile Foundation Analysis and Design)
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18 pages, 3306 KiB  
Article
Evaluation of Methods Based on CPTu Testing for Prediction of the Bearing Capacity of CFA Piles
by Ján Mihálik, Filip Gago, Jozef Vlček and Marián Drusa
Appl. Sci. 2023, 13(5), 2931; https://doi.org/10.3390/app13052931 - 24 Feb 2023
Cited by 6 | Viewed by 1547
Abstract
Analysis of pile bearing capacity is an important task in the investigation of soil-structure interaction. The paper is dedicated to the prediction methods for the pile bearing capacity calculation based on the cone penetration test (CPTu) results, namely UniCone method, Laboratoire Central des [...] Read more.
Analysis of pile bearing capacity is an important task in the investigation of soil-structure interaction. The paper is dedicated to the prediction methods for the pile bearing capacity calculation based on the cone penetration test (CPTu) results, namely UniCone method, Laboratoire Central des Ponts et Chaussées method (LCPC), and the method involved in the Eurocode 7—2. A set of CFA piles was tested to obtain reference bearing capacity. The ability of the prediction methods to determine the bearing capacity of the pile was investigated. In each evaluation criteria using statistical tools, the methods were ranked based on their performance. The results of the study indicate that the UniCone method is most applicable for the given conditions. The EC 7—2 method showed the largest variability of results, and we do not recommend its application without a deeper analysis. The applicability of any presented method cannot be considered final or universal. It is advisable to use more modern and updated methods which have been developed from a larger database of pile tests. The development of these methods should continue by expanding the database of tested piles together with the application of more advanced rock environment testing procedures. Full article
(This article belongs to the Special Issue Pile Foundation Analysis and Design)
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13 pages, 5203 KiB  
Article
Parametric Study on Analyzing the Effect of Soil–Cement Strength on the Uplifting Behavior of HSCM Piles Installed in Marine Soft Clay
by Xiaoxuan Zhuang, Zhongling Zong, Yunhan Huang, Chushu Wang and Xiangjun Lin
Appl. Sci. 2023, 13(1), 330; https://doi.org/10.3390/app13010330 - 27 Dec 2022
Cited by 2 | Viewed by 1504
Abstract
The Helix-Stiffened Cement Mixing (HSCM) pile is a composite pile constructed by grouting the soil–cement during the installation of the helical pile. A series of 3-D Finite Element Method (FEM) models were developed to investigate the uplifting behavior of HSCM piles installed in [...] Read more.
The Helix-Stiffened Cement Mixing (HSCM) pile is a composite pile constructed by grouting the soil–cement during the installation of the helical pile. A series of 3-D Finite Element Method (FEM) models were developed to investigate the uplifting behavior of HSCM piles installed in marine soft clay. The uplifting behavior of HSCM piles was compared to the Stiffened Deep Cement Mixing (SDCM) piles and the difference was discussed. The FEM results showed that the uplifting ultimate bearing capacity of the HSCM piles and SDCM piles increased with the soil–cement-strength-to-clay-adhesion ratio (Cref/su) until the ratio reached 20 and 40, respectively. The failure mode influenced the uplifting behavior of HSCM piles. At Cref/su  40,80, the HSCM pile incurred damage at the pile–soil interface, which gradually shifted to the steel pipe and soil–cement interface as the Cref/su was further decreased. Based on the FEM results, the empirical formula for estimating the uplift ultimate bearing capacity of HSCM piles under different failure types was proposed, which provided reliable guidance for designing HSCM piles. Full article
(This article belongs to the Special Issue Pile Foundation Analysis and Design)
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18 pages, 13358 KiB  
Article
Model Test on Effect of Ground Fissure on the Behavior of Oblique Two-Section Subway Tunnel
by Lei Liu, Tao Ma, Jin-Kai Yan and Zhi-Hui Wang
Appl. Sci. 2022, 12(20), 10472; https://doi.org/10.3390/app122010472 - 17 Oct 2022
Viewed by 879
Abstract
The dynamic interaction between the ground fissure and an oblique two-section horseshoe-shaped subway tunnel under the subway dynamic load was investigated based on a series of model tests in this study. The results indicated that the subway subway-induced vibration attenuated in different degrees [...] Read more.
The dynamic interaction between the ground fissure and an oblique two-section horseshoe-shaped subway tunnel under the subway dynamic load was investigated based on a series of model tests in this study. The results indicated that the subway subway-induced vibration attenuated in different degrees when propagating in the directions in the soil layer, while the ground fissure had an attenuation effect on subway vibration. Furthermore, the vibration of the soil layer below the tunnel near the ground fissure was stronger than that of the upper soil layer, and the vibration response at the tunnel bottom was stronger than that of the arch waist and the tunnel crown. The additional contact pressure between the tunnel bottom and the soil was relatively large when the ground fissure was not active, while the additional strain at the top and bottom of the tunnel caused by the excitation was small. Moreover, when the hanging wall of the ground fissure descended, the additional contact pressure at the tunnel crown in the hanging wall and the tunnel bottom in the footwall significantly increased, and a negative additional stain was identified at those two positions. Meanwhile, a positive additional stain was identified at the tunnel crown in the footwall and the tunnel crown in the hanging wall, increasing with the descent of the hanging wall. Full article
(This article belongs to the Special Issue Pile Foundation Analysis and Design)
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