The Numerical Simulation of Gravel Pile Composite Foundation and Inspection Test

2010 ◽  
Author(s):  
Yang Weifeng ◽  
Xia Xiaohong ◽  
Wang Yi ◽  
Li Ming
Keyword(s):  
Numerical Simulation ◽  
Composite Foundation ◽  
Gravel Pile

Computer Modeling for Different Piles Reinforcement in Control Deformation of Pavement

2011 ◽  
Vol 71-78 ◽  
pp. 4082-4085
Author(s):  
Yong Zhou ◽  
Jian Xin Liu
Keyword(s):  
Numerical Simulation ◽  
Computer Modeling ◽  
Ground Improvement ◽  
Simulation Software ◽  
Composite Foundation ◽  
Foundation Engineering ◽  
Strength And Stiffness ◽  
Gravel Pile ◽  
Real Practice ◽  
Powder Spraying

Multi-pile composite foundation is a method of ground improvement that involves using different pile types with different lengths and diameters beneath the same raft. The types of piles are chosen to mobilize the strength and stiffness of the soil at shallow depths. CFG (cement–flyash–gravel) pile and powder spraying pile have been widely applied in civil engineering, and gradually in highway foundation engineering. But the settlement of the pavement reinforced by the two types of piles has seldom been studied. In the present paper, the numerical simulation software FLAC3D is adopted to simulated the highway foundation reinforced by CFG pile and powder spraying pile , the spacing of piles and cushion thickness are changed, the settlements of the pavement are obtained to give guidance for the real practice.

Research on Stress Distribution of CFG Pile-Net Composite Foundation in High-Speed Railway

2013 ◽  
Vol 361-363 ◽  
pp. 1833-1837 ◽  
Author(s):  
Jun Cheng ◽  
Ji Wen Zhang
Keyword(s):  
Numerical Simulation ◽  
High Speed ◽  
Stress Ratio ◽  
Field Tests ◽  
Composite Foundation ◽  
Additional Stress ◽  
High Speed Railway ◽  
Soil Stress ◽  
Gravel Pile ◽  
Cfg Pile

Combined with the field tests of CFG (Cement Fly-ash Gravel) pile-net (geogrid) composite foundation in Danyang Test Section of the Beijing-Shanghai High-speed Railway, the settlement, pile-soil stress ratio and additional stress of composite foundation were analyzed by numerical simulation. It shows that the pile-soil stress ratio of CFG pile-net composite foundation is in the range of 4 to 6. And the reasonable distribution of additional stress in composite foundation is also discussed. The results can provide references for the design of the CFG pile-net composite foundation under embankment in high-speed railway.

The Settlement Analysis of the Cement Fly-Ash Gravel Pile Composite Foundation of Baotou

2014 ◽  
Vol 580-583 ◽  
pp. 518-523
Author(s):  
Juan Li ◽  
Yao Xu ◽  
Jun Yin
Keyword(s):  
Fly Ash ◽  
Composite Foundation ◽  
Settlement Calculation ◽  
Practical Engineering ◽  
Cfg Pile Composite Foundation ◽  
Modified Formula ◽  
Gravel Pile ◽  
Final Settlement ◽  
Settlement Analysis ◽  
Cfg Pile

This paper analyzes the causes of larger differences of final settlement calculated value of cement fly-ash gravel pile (CFG pile) composite foundation of Baotou with actual observed result of it. On the basis of analysis on a number of practical engineering data of Baotou, we modify the settlement formula of the CFG pile composite foundation and gain the modified coefficient applied to the settlement calculation of the CFG pile composite foundation of Baotou. The modified formula and coefficient proposed in this paper have a positive effect on the accurate settlement calculation of puting forward a more accurate correction formula and coefficient of the calculation of the CFG pile composite foundation of Baotou.

Numerical Simulation of Reinforcement Effect and Settlement of Concrete Pile Composite Foundation

2013 ◽  
Vol 779-780 ◽  
pp. 434-438
Author(s):  
Dao Fang Wang ◽  
Xue Qing Wang ◽  
Nan Tong Zhang ◽  
Yan Chen
Keyword(s):  
Numerical Simulation ◽  
Influence Factors ◽  
Simulation Method ◽  
Composite Foundation ◽  
Reinforcement Effect ◽  
Numerical Simulation Method ◽  
Concrete Pile

The differential and large settlement may have a great effect on the construction and maintenance of highway. Based on the study of concrete pile composite foundation, the effect of concrete pile composite foundation on reinforcement and influence factors of settlement are analyzed in the paper. The effects of pile modulus and embankment modulus on settlement with numerical simulation method are analyzed in the paper. The result of numerical simulation method is that the settlement of embankment may be reduced with the method of concrete pile composite foundation and pile modulus may have a great effect and embankment modulus may have some effect on the settlement of embankment.

Application of LS-SVM to Prediction of Bearing Capacity of Cement-Flyash-Gravel Pile Composite Foundation

2013 ◽  
Vol 438-439 ◽  
pp. 1399-1403
Author(s):  
Wei Ding ◽  
Qing Liu ◽  
Kang Kang Sun ◽  
Feng Tao Sui
Keyword(s):  
Bearing Capacity ◽  
Great Influence ◽  
Composite Foundation ◽  
Learning Ability ◽  
Support Vector ◽  
Data Prediction ◽  
Svm Model ◽  
Cfg Pile Composite Foundation ◽  
Gravel Pile ◽  
Cfg Pile

There are a lot of factors that influence the bearing capacity of composite foundation, and the relationship between them is complex and nonlinear. Based on study of main factors that have great influence on bearing capacity of cement-flyash-gravel (CFG) pile composite foundation, the least squares support vector machine (LS-SVM) model of bearing capacity of composite foundation was established. The results show that the model has excellent learning ability and generalization and can provide accurate data prediction only with fewer observed sample. It is proved that the new method is a promising method for the determination of bearing capacity of CFG pile and other rigid piles composite foundation.

Step by Step Calculation and Application of Multi-Type-Pile Composite Foundation

2012 ◽  
Vol 170-173 ◽  
pp. 252-255
Author(s):  
Xiao Hui Mao ◽  
Qiang Yue
Keyword(s):  
Bearing Capacity ◽  
Load Transfer ◽  
Composite Foundation ◽  
Frame Structure ◽  
Single Type ◽  
High Rise ◽  
Construction Methods ◽  
Rigid Pile ◽  
Capacity Improvement ◽  
Gravel Pile

The flexible pile and the rigid pile, the gravel pile and CFG pile are arranged in a group as compound piles, which utilize their merits and avoid their shortcomings. Based on the study of the existing calculation methods for the bearing capacity of multi-pile composite foundation, the working behavior of loaded multi-pile composite foundation and the general influence of different construction methods to the bearing capacity of the soil are considered. The coefficient of the bearing capacity exertion of master piles, the coefficient of the bearing capacity exertion of minor piles, the coefficient of the bearing capacity exertion of the soil between piles and the coefficient of the bearing capacity improvement of the soil are introduced. The new step-by-step calculation method for the bearing capacity of multi-pile composite foundation is put forward. Through designed a high-rise frame structure with multi-type-pile composite foundation, the results show that the multi-type-pile composite foundation is more whole and possess stronger capacity of load transfer compared with single-type-pile composite foundation. It can satisfy the requirements of load bearing capacity and deformation under special foundation conditions.

Numerical Study on the Bearing Capacity of Composite Foundation with Pile-Soil Shear Modulus

2013 ◽  
Vol 405-408 ◽  
pp. 57-62
Author(s):  
Wei Zhou Li
Keyword(s):  
Numerical Simulation ◽  
Shear Modulus ◽  
Simulation Model ◽  
Bearing Capacity ◽  
Numerical Study ◽  
Composite Foundation ◽  
Capacity Increase ◽  
The Right

Numerical simulation model was established with FLAC3D to calculate the bearing capacity and the settlement of composite foundation with different pile-soil shear modulus. Then the rules of the effect of pile-soil shear modulus upon mixed pile composite foundation have been obtained. The results show that there is a great relationship between the pile-soil shear modulus and the bearing capacity of mixed pile composite foundation. Along with the increase of pile-soil shear modulus, the bearing capacity increase. Also, this paper suggest that the right value of pile-soil shear modulus of mixed pile composite foundation solidified by HEC or HAS consolidator dosing 12%, which can be used for the design of mixed pile composite foundation.

Dynamic Analysis on Rammed Soil-Cement Pile Composite Foundation

2012 ◽  
Vol 170-173 ◽  
pp. 569-573
Author(s):  
Wei Tong Guo ◽  
Yan Jie Meng
Keyword(s):  
Numerical Simulation ◽  
Dynamic Analysis ◽  
Composite Foundation ◽  
Vertical Acceleration ◽  
Main Frequency ◽  
Frequency Level ◽  
Soil Cement ◽  
The Future

The test on was rammed soil-cement pile composite foundation was done,On the basis of the test. Numerical simulation was analyzed to rammed soil-cement piles.The conclusions were draw from the main frequency,level acceleration, vertical acceleration and influence factors.Theory basis was provided for the study on rammed soil-cement pile composite foundation in the future

Numerical Simulation Research on the Settlement Regularity in Pile-Net Composite Foundation

2011 ◽  
Vol 261-263 ◽  
pp. 1251-1256
Author(s):  
Jin Jiang YU ◽  
Qian Gong Cheng ◽  
Cheng Hui Li ◽  
Hua Wen
Keyword(s):  
Numerical Simulation ◽  
Soft Soil ◽  
Composite Foundation ◽  
Simulation Research ◽  
Pile Spacing ◽  
Engineering Characteristics ◽  
Foundation Treatment ◽  
Pile Cap ◽  
Deep Soft Soil

Based on the foundation treatment for deep soft soil in Chaoshan station district, this paper studied the engineering characteristics of soft soil in Chaoshan and the settlement regularity of pile-net composite foundation, etc. by numerical simulation. The results show: the reduction of pile spacing and the settings of pile cap can decrease the settlement of soil among the piles on foundation plane.

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