scholarly journals The Research on the Affect of Collapse State and Bearing Capacity of the Soil Layer Properties Adjacent to the Bearing Plate of the Multi-Extruded-Expanded-Plates Pile

2015 ◽  
Vol 9 (1) ◽  
pp. 167-170 ◽  
Author(s):  
Yongmei Qian ◽  
Xiaolong Liu
Keyword(s):  
Physical Properties ◽  
Bearing Capacity ◽  
Theoretical Basis ◽  
Soil Layer ◽  
Single Pile ◽  
Calculation Formula ◽  
Research Status ◽  
Bearing Plate ◽  
Collapse State ◽  
Different Characteristics

This paper introduces the research status and analysis of the Multi-Extruded-Expanded-Plates pile (the MEEP pile) at home and abroad, by studying when the plate of pile embedded in different characteristics soil layer, the thickness, physical properties of upper and lower soil layer adjacent to the soil with plate cause the influence on soil break and bearing capacity of the soil layer with plate, analyzing the work together with pile and soil in different soil layer, providing a theoretical basis to improve the calculation formula of bearing capacity of single pile, ensuring the rationality and reliability of the design of the MEEP pile.

scholarly journals Analysis of Soil Characteristics Affecting Failure Behavior and Bearing Capacity of the Concrete Expanded-Plates Pile

2015 ◽  
Vol 9 (1) ◽  
pp. 188-191 ◽  
Author(s):  
Yongmei Qian ◽  
Dehao Ren ◽  
Ruozhu Wang
Keyword(s):  
Bearing Capacity ◽  
Failure Mechanism ◽  
Soil Layer ◽  
Soil Characteristics ◽  
Failure Behavior ◽  
Research Results ◽  
Bearing Plate ◽  
Soil Failure ◽  
Study Results ◽  
Different Characteristics

By analyzing the present research results on the concrete expanded-plates pile, the article presents further preliminary studies of their influence on the bearing capacity and failure behavior when the bearing plate is put adjacent to different characteristics of soil and thickness of soil layer. The pile calculation mode for ultimate compression and uplift bearing capacity of the soil failure mechanism of the concrete expanded-plates pile under different conditions is also improved. The study results ensure the rationality and reliability of the design and the applicability of this type of pile in the actual project.

scholarly journals A Full-Scale Experimental Study of the Vertical Dynamic and Static Behavior of the Pier-Cap-Pile System

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Jianlei Liu ◽  
Meng Ma ◽  
Flavio Stochino
Keyword(s):  
Experimental Study ◽  
Bearing Capacity ◽  
Dynamic Stiffness ◽  
Soil Layer ◽  
Low Frequency ◽  
Full Scale ◽  
Single Pile ◽  
Static Stiffness ◽  
Loading Test ◽  
Test Technique

The bearing capacity evaluation of bridge substructures is difficult as the static loading test (SLT) cannot be employed for the bridges in services. As a type of dynamic nondestructive test technique, the dynamic transient response method (TRM) could be employed to estimate the vertical bearing capacity when the relationship between static stiffness and dynamic stiffness is known. The TRM is usually employed to evaluate single piles. For the pier-cap-pile system, its applicability should be investigated. In the present study, a novel full-scale experimental study, including both TRM test and SLT, was performed on an abandoned bridge pier with grouped pile foundation. The test included three steps: firstly, testing the intact pier-cap-pile system; then, cutting off the pier and testing the cap-pile system; finally, cutting off the cap and testing the single pile. The TRM test was repeatedly performed in the above three steps, whereas the SLT was only performed on the cap-pile system. Based on the experimental results, the ratio of dynamic and static stiffness of the cap-pile system was obtained. The results show that (1) in the low-frequency range (between 10 and 30 Hz in this study), the dynamic stiffness of the whole system is approximately four times of that of a single pile; (2) the ratio of dynamic and static stiffness of the cap-pile system tested in the study is approximately 1.74, which was similar to other tested values of a single pile; (3) to evaluate the capacity of similar cap-pile system and with similar soil layer conditions by TRM, the value of Kd/Ks tested in the study can be used as a reference.

Design and Bearing Capacity Study of Multi-Wing Branch Pile

2011 ◽  
Vol 243-249 ◽  
pp. 1311-1315
Author(s):  
Ying Li Liu ◽  
Chun Miao Li
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Design Process ◽  
Scientific Research ◽  
Engineering Practice ◽  
Single Pile ◽  
Calculation Formula ◽  
Basic Principles

This paper describes the characteristics and construction processes of Multi-winged branches pile, it also introduces the basic principles and considerations should be followed in the design process by analyzing the mechanical properties of Multi-winged branches pile, and summarizes the calculation formula of bearing capacity for the single pile. This formula is suitable for Multi-winged branches pile and it can provide the reference for scientific research and engineering practice.

Discussion on Effect Factors and Formula of Bearing Capacity of Reinforced Mixing Pile

2012 ◽  
Vol 594-597 ◽  
pp. 708-712
Author(s):  
Gui Lin Sheng ◽  
Ya Ge Zhang
Keyword(s):  
Experimental Data ◽  
Theoretical Analysis ◽  
Bearing Capacity ◽  
Interaction Mechanism ◽  
Single Pile ◽  
Calculation Formula ◽  
Effect Factors ◽  
Capacity Calculation ◽  
Pile Length

Based on the reinforced mixing pile soil interaction mechanism, the effect of the reinforced mixing pile bearing capacity factors are analyzed; and on the basis of experiment and theoretical analysis the results of reinforced mixing pile with core rate optimal optimum core pile length and ratio; in the analysis of experimental data based on the present, on single pile the bearing capacity calculation formula and puts forward some suggestions.

Analysis of Diameter of the Bearing Push-Extend Reamed in the Size of the Influence of the PEMUR Pile Bearing Capacity of Single Pile

2014 ◽  
Vol 962-965 ◽  
pp. 988-991
Author(s):  
Yong Mei Qian ◽  
Da Jun Yang ◽  
Xiao Long Liu
Keyword(s):  
Finite Element Method ◽  
Shear Stress ◽  
Bearing Capacity ◽  
Theoretical Basis ◽  
Soil Mass ◽  
Single Pile ◽  
The Finite Element Method ◽  
Disc Diameter ◽  
Pile Design ◽  
Simulated Analysis

As the change of diameter of the bearing push-extend reamed in the size, failure pattern of soil mass around the PEMUR pile has changes. Based on the finite element method, simulated analysis has been conducted about normal stress and shear stress of soil around pile under different plate diameter size, which has qualitatively identified that the PEMUR pile bearing capacity of single pile has influence on disc diameter, application for this type of pile design provides a theoretical basis.

scholarly journals Analysis of the Effect of the Space of the Bearing Plate on the Uplift Bearing Capacity of the Concrete Plates-expanded Pile

2015 ◽  
Vol 9 (1) ◽  
pp. 610-615
Author(s):  
Qian Yong-Mei ◽  
Zhai Rong-Zheng
Keyword(s):  
Bearing Capacity ◽  
Theoretical Basis ◽  
Influence Factors ◽  
The Other ◽  
Bearing Plate ◽  
Practical Engineering ◽  
Concrete Plates

In this paper, using ANSYS FEM software to simulate the failure status of the concrete plates-expanded pile (CPEP) in clay, keeping the other parameters constant, and through changing the space of plate of the concrete platesexpanded pile to study the effect of the space of plate on the uplift bearing capacity of the concrete plates-expanded pile. Through the research of this paper to complete the influence factors of the uplift bearing capacity of the concrete platesexpanded piles, in order to provide theoretical basis to the application of the concrete plates-expanded pile in practical engineering.

scholarly journals Identification of slip surfaces in shallow landslides at Aso volcano, Japan based on the fine fraction-plasticity index relationship

2020 ◽  
Author(s):  
Mega Lia Istiyanti ◽  
Satoshi Goto
Keyword(s):  
Physical Properties ◽  
Soil Layer ◽  
Fine Fraction ◽  
Liquid Limit ◽  
Shallow Landslides ◽  
Plasticity Index ◽  
Aso Volcano ◽  
Slip Surfaces ◽  
Different Characteristics ◽  
The Relationship

Abstract Shallow landslides have frequently occurred in the Aso volcano, Kyushu island, Japan. Yet, observations of the effects of the physical properties of the soil on the landslide stratigraphy have not been explained. In this study, we conducted field observations—at two landslide sites in the Takadake mountain (Aso volcano) area—to identify the slip surfaces. We found that slip surfaces (at both sites) were located in the lower part of the N3-4 Kuroboku soil layer. This was determined by characteristics of the physical properties of the soil, including particle size distribution and plasticity index. Furthermore, we identified the relationship between plasticity index and the fine fraction of the soil to help explain the identification of slip surfaces. Results showed that Kuroboku and Scoria layers have different characteristics according to the plasticity chart (liquid limit-plasticity index relationship) as well as plasticity index-fine fraction relationship.

The Research on the Ultimate Bearing Capacity of Soil around the Push-Extend Multi-under-Reamed Pile at Sliding Failure State

2014 ◽  
Vol 578-579 ◽  
pp. 232-235 ◽  
Author(s):  
Yong Mei Qian ◽  
Da Peng Zhao ◽  
Xue Wen Xie
Keyword(s):  
Bearing Capacity ◽  
Failure Mechanism ◽  
Ultimate Bearing Capacity ◽  
Single Pile ◽  
Calculation Formula ◽  
Failure State ◽  
Line Theory

In the paper, the existing unreasonable place of the calculation formula of the bearing capacity of single pile is put forward. Through analyzing the failure mechanism of the soil up and under the Multi-under-reamed, the method for calculating the ultimate bearing capacity of soil around the PEMUR pile can be determined by using the slide-line theory, and the calculation formula of the bearing capacity of single pile of the PEMUR pile is further revised and perfected.

Study and Application on Computational Methods for Ultimate Bearing Capacity of Single Pile

2008 ◽  
Vol 400-402 ◽  
pp. 329-334
Author(s):  
Ze Liang Yao ◽  
Zhen Jian ◽  
Guo Liang Bai
Keyword(s):  
Bearing Capacity ◽  
Computational Methods ◽  
Ultimate Bearing Capacity ◽  
Contact Element ◽  
Computational Formula ◽  
Single Pile ◽  
Foundation Design ◽  
Experiment Method ◽  
Contact Element Method ◽  
Element Method

It is difficult and important to accurately calculate single pile ultimate bearing capacity during pile foundation design. Typical computational methods on single pile ultimate bearing capacity are contrastively analyzed in this paper. Contact element method on single pile ultimate bearing capacity is relatively accurate and economical, but it isn’t used in practical projects until now because its computational process is complicated. 343 different single pile ultimate bearing capacities are calculated with the contact element method in order to study a simple computational formula based on the contact element method. All data calculated are analyzed with a linear recursive multi-analysis program which is programmed with Fortran90. A simple computational formula on the contact element method is presented based on the analysis results. The simple computational formula, the experiential formula in the code, the contact element method and the static load experiment method are respectively used to calculate single pile ultimate bearing capacity in two practical projects in order to test the simple computational formula. The results show that the simple computational formula is relatively accurate. Some advice is presented based on the analysis results.

Prediction of Ultimate Bearing Capacity of Half-Screwed Pile by Integrated Exponential Function Model

2013 ◽  
Vol 353-356 ◽  
pp. 881-885
Author(s):  
Jian Xiong Liu ◽  
Yan Yan Gao ◽  
Xiu Hua Li
Keyword(s):  
Bearing Capacity ◽  
Functional Model ◽  
Ultimate Bearing Capacity ◽  
Model Solution ◽  
Least Square ◽  
Single Pile ◽  
Engineering Research ◽  
Exponential Functional ◽  
Practical Engineering ◽  
Difference Form

This study fitted the measured loading-settlement curve of half-screwed pilewith least square model solution of difference form of integrated exponential functional model, and predict ultimate bearing capacity of half-screwed pile according to the fitted curve of maximum curvature point. Combined with practical engineering research, the study explored the feasibility, rationality and limitations of predicting the half-screwed single pile ultimate bearing capacity with least square model solution of difference form of integrated exponential functional model, and provided the theoretical basis for the popularization and application of the half-screwed pile.

Sign in / Sign up

Export Citation Format

Share Document