Numerical simulations and parametric study of SDCM and DCM piles under full scale axial and lateral loads

Voottipruex, Panich; Suksawat, Taweephong; Bergado, Dennes T.; Jamsawang, Pitthaya

doi:10.1016/j.compgeo.2010.11.006

Cited by 89 publications

(27 citation statements)

References 2 publications

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“…is can be attributed to the fact that the presence of the improved soil surrounds resulted in a large equivalent diameter of the pile, which could generate greater soil resistance to the pile de ection, thus signi cantly reducing the bending moment in the PC pile. e reduction is also in agreement with Voottipruex et al [6] and Liu [10], who found that the outer improved soil surrounds may play a critical role in load transfer and can e ectively transfer the lateral load from the PC pile to the surrounding soil.…”

Section: Validation and Resultssupporting

confidence: 79%

“…To investigate the vertical bearing characteristics of PC piles with improved soil surrounds, a series of pile load tests, numerical simulations, and theoretical models have been carried out [5][6][7][8][9]. ese studies verified that the application of cement-improved soil surrounds could greatly improve the vertical bearing capacity of the PC pile and reduce its settlement.…”

Section: Introductionmentioning

confidence: 99%

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Calculation Approach for Lateral Bearing Capacity of Single Precast Concrete Piles with Improved Soil Surrounds

Wang

et al. 2018

Advances in Civil Engineering

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Precast concrete (PC) piles with cement-improved soil surrounds have been widely used for soft ground improvement. However, very few calculation approaches have been proposed to predict the lateral bearing capacity. is study aims at investigating the lateral capacity of a single PC pile reinforced with cement-improved soil through a series of 3D finite element analyses and theoretical studies. It is revealed that application of cement-improved soil around the PC pile can obviously reduce the induced lateral deflections and bending moments in the pile and can significantly increase its capacity to resist lateral loading. To account for the reinforcement effect of cement-treated soil, a modified m approach is proposed by introducing a modified coefficient to enable the predictions of the lateral bearing capacity for such reinforced PC piles. It is revealed that the modified coefficient is approximately linearly related to the compressive bearing capacity of improved soil surrounds.

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Section: Validation and Resultssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Calculation Approach for Lateral Bearing Capacity of Single Precast Concrete Piles with Improved Soil Surrounds

Wang

et al. 2018

Advances in Civil Engineering

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“…Zhao et al (2010) presented two failure modes of SDM column under plate loading test, namely the core pile failure and the interface failure between concrete core pile and DM column. Zhao et al (2010) and Voottipruex et al (2011aVoottipruex et al ( , 2011b indicated that the length of core pile had more significant influence on bearing capacity than diameter of core pile. Jamsawang et al (2011) and Raongjant and Jing (2013) experimentally found that the lateral bearing capacity of SDM column was 11 to 15 times and 3 to 4 times greater than that of DM column under static load and cyclic load, respectively.…”

Section: Introductionmentioning

confidence: 95%

Numerical study on load transfer effect of Stiffened Deep Mixed column-supported embankment over soft soil

Cai

2016

KSCE J Civ Eng

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A new composite column technique referred to as Stiffened Deep Mixed (SDM) column has been adopted to support embankment over soft soil to mitigate the post-construction settlement, increase bearing capacity and enhance stability. The SDM column was formed by inserting a precast concrete core pile into the center of a Deep Mixed (DM) column immediately after the construction of DM column. Due to the complicate interaction between concrete core pile, DM column and surrounding soil, the load transfer mechanism between SDM column and surrounding soil has not been well understood yet. This paper presents a series of threeDimensional (3-D) finite-element analyses to investigate the load transfer effect of SDM column-reinforced ground under embankment. First, the numerical method was validated by a comparison with field data in terms of settlements and vertical stress on the head of SDM column. Then, based on the validated simulation method, the 3-D numerical model of the SDM column-supported embankment over soft soil was established, and the influence factors of length of DM column and concrete core pile, cross section area of concrete core pile, column spacing and embankment height on the load transfer effect were investigated, respectively. The results showed that the column spacing and height of embankment fill had significant effects on the load transfer between SDM column and surrounding soil, while the influences of length of DM column and concrete core pile, and cross section area of concrete core pile on the load transfer effect were minor. Finally, four current commonly-used design methods were assessed in the prediction of the efficacy of SDM-reinforced soil under embankment loading. The current commonly-used design methods showed great differences in the load transfer predictions of the SDM column-supported embankment over soft soil due to the existence of outer DM column socket. A modified method was proposed for the use of EBGEO (2011) in the design of SDM column-supported embankment over soft soil.

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“…It is commonly used in road construction, airport, embankment and canal linings to increase strength and bearing capacity and to reduce swelling of problematic soils. Many researchers have reported on pavement and geotechnical applications of cement stabilized soil (Porbaha, 1998;Porbaha et al, 1998;Miura et al, 2001;Horpibulsuk et al, 2006;Horpibulsuk et al, 2005;Chinkulkijniwat and Horpibulsuk, 2012;Lorenzo and Bergado, 2006;Arulrajah et al, 2009;Horpibulsuk et al, 2011;Voottipruex et al, 2011;Horpibulsuk et al, 2012b;Du et al, 2013;Shen et al, 2013;Teerawattanasuk and Voottipruex, 2014).…”

Section: Introductionmentioning

confidence: 99%

Mix design charts for lightweight cellular cemented Bangkok clay

Teerawattanasuk

Voottipruex

Horpibulsuk

2015

Applied Clay Science

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Numerical simulations and parametric study of SDCM and DCM piles under full scale axial and lateral loads

Cited by 89 publications

References 2 publications

Calculation Approach for Lateral Bearing Capacity of Single Precast Concrete Piles with Improved Soil Surrounds

Calculation Approach for Lateral Bearing Capacity of Single Precast Concrete Piles with Improved Soil Surrounds

Numerical study on load transfer effect of Stiffened Deep Mixed column-supported embankment over soft soil

Mix design charts for lightweight cellular cemented Bangkok clay

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