Plasticity solution for the limit vertical pressure of a single rigid pile with a pile cap in soft soil

2020 ◽  
Vol 117 ◽  
pp. 103260
Author(s):  
Hang Zhou ◽  
Hanlong Liu ◽  
Xueyuan Li ◽  
Xuanming Ding
Keyword(s):  
Soft Soil ◽  
Vertical Pressure ◽  
Rigid Pile ◽  
Pile Cap

Field Study of Improvement Mechanism of Geogrid-Reinforced and Pile-Supported Embankment

2014 ◽  
Vol 587-589 ◽  
pp. 928-933 ◽  
Author(s):  
Feng Lian ◽  
Zhi Liu ◽  
Jie Xu ◽  
Qiang Wang ◽  
Xian Hu Hu ◽  
...  
Keyword(s):  
Load Transfer ◽  
Soft Soil ◽  
Composite Foundation ◽  
Replacement Ratio ◽  
Floating Pile ◽  
Pile Cap ◽  
Soil Arch ◽  
Better Than ◽  
End Bearing Pile ◽  
Pile Supported Embankment

Two experimental areas in a highway soft soil ground treatment project in Guangdong Province were designed to investigate the improvement mechanism of geogrid-reinforced and pile-supported embankment(GRPS).The experimental results showed: In End-bearing Pile Area,the differential settlement between pile and soil was bigger than that of Floating Pile Area,so the bearing capacity of soil was exerted to a certain extent in Floating Pile Area. The bearing efficacy of soil below the pile cap was little, so the replacement ratio of composite foundation could be calculated according to the pile cap dimension. The load transfer efficacy of the geogrid was better than that of the soil arch. Five kinds of methods were used to evaluate the soil arch in the fill and it was indicated that the results calculated by the BS8006 method and Carlsson method was close to the experimental data which was smaller than results calculated by Hewlett method and Terzaghi method, bigger than Guido method. Through the analysis of the pile-soil stress ratio, the improvement mechanism of the two types of GRPS were revealed.

Centrifuge study on behavior of rigid pile composite foundation under embankment in soft soil

2020 ◽  
Author(s):  
Jian-lin Yu ◽  
Jia-jin Zhou ◽  
Xiao-nan Gong ◽  
Ri-qing Xu ◽  
Jun-yuan Li ◽  
...  
Keyword(s):  
Soft Soil ◽  
Composite Foundation ◽  
Rigid Pile ◽  
Rigid Pile Composite Foundation

Mechanical Performance of Geosynthetic-Reinforced Pile-Supported Embankments

2010 ◽  
Vol 156-157 ◽  
pp. 1696-1701
Author(s):  
Ling Sun ◽  
Jun Jie Zheng ◽  
Jun Zhang ◽  
Qiang Ma
Keyword(s):  
Mechanical Performance ◽  
Soft Soil ◽  
Interaction Mechanism ◽  
Measured Data ◽  
Engineering Practice ◽  
Circular Arc ◽  
Arching Effect ◽  
Pile Cap ◽  
Current Design ◽  
Embankment Load

According to the characteristics of the soft soil subgrade reinforced by geosynthetic and piles, the deformation of geosynthetic was modeled as circular arc and the arching effect in embankments and the interaction of piles and soil are both considered in the calculation. The interaction mechanism of geosynthetic, pile and soil under the embankment load was analyzed. The method presented in this paper was validated by comparing with the testing results and three current design methods in the literature. The results show that the analytical solutions have agreement with the measured data and can be applied in engineering practice. Finally, four important parameter (the differential settlement, the diameter of pile, the width of pile cap, the height of equal settlement plane) were investigated.

scholarly journals Influence of Surcharge Load on the Adjacent Pile Foundation in Coastal Floodplain

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Hao Zhang ◽  
Kai Sun
Keyword(s):  
Soft Soil ◽  
Three Dimensional ◽  
Bending Moment ◽  
Double Row ◽  
Pile Cap ◽  
Dimensional Finite Element ◽  
Surcharge Load ◽  
Soft Substratum ◽  
And Migration ◽  
Three Dimensional Finite Element

<p><strong> </strong>In this paper, in order to investigate the behavior of existing piles caused by the horizontal and compression deformation of soft substratum due to backfill surcharge on coastal floodplain, three-dimensional finite element models of piles adjacent to surcharge load were established. The deformation and migration law of soft soil was analyzed. The behavior of single pile and double row pile adjacent to surcharge load were studied, in which the influence of surcharge load location, surcharge pressure, pile stiffness, and pile top constraint conditions were considered. The results show that as the position of surcharge load is closer and the surcharge pressure increases, the response (e.g. deformation and bending moment) is more obvious. With the increase of pile stiffness, the range of passive load is increased. The deformation behavior of pile body under different constraints of pile cap is significantly different. The effect of secondary bending moment caused by pile axial force is obvious and cannot be ignored. If there is a thick soft substratum, it is beneficial to improve the behavior of adjacent piles by using cement mixing pile reinforcement.</p>

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.

Construction Technology of Rigid-Flexible Composite Piles for Reinforced Thick Overburden and Deep-Buried Soft Soil

2015 ◽  
Vol 744-746 ◽  
pp. 459-463
Author(s):  
Xin Quan Wang ◽  
Yun Liang Cui ◽  
Jian Feng Liang ◽  
Shi Min Zhang ◽  
Yi Qun Tan ◽  
...  
Keyword(s):  
Bulk Material ◽  
Soft Soil ◽  
Soil Layer ◽  
Construction Technology ◽  
Reinforcing Effect ◽  
Soil Mixing ◽  
Rigid Pile ◽  
Body Strength ◽  
Thick Overburden ◽  
Poor Soil

By adopting the conventional pile foundation to treat the area of thick overburden on soft soil, the reinforcing effect can’t meet the use requirement: by adopting the bulk material pile, the lower pile body strength can’t be ensured, and by adopting the cemented soil mixing pile for reinforcing, the pile is difficult to form and the reinforcing depth can’t meet the requirement. This paper aims to overcome the defects of the conventional construction method by adopting different materials to treat, namely, the concrete rigid pile is adopted for reinforcing the soft soil layer with poor soil body quality and the cement mortar flexible pile is adopted for reinforcing the overburden with excellent soil body quality, therefore not only the reinforcing effect is ensured, but also the construction cost is saved.

scholarly journals Numerical Study Of Spun Pile To Pile Cap Connections In Soft Soil

2021 ◽  
Vol 1858 (1) ◽  
pp. 012087
Author(s):  
Yulius ◽  
Widjojo Adi Prakoso ◽  
Mulia Orientilize ◽  
Bastian Okto Bangkit Sentosa
Keyword(s):  
Numerical Study ◽  
Soft Soil ◽  
Pile Cap
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