Use of lime and cement treated soils as pile supported load transfer platform

Okyay, Umur Salih; Dias, Daniel

doi:10.1016/j.enggeo.2010.03.008

Cited by 125 publications

(47 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The effect of pile installation was thus not taken into account. The soil and the pile are represented by volume elements [6].…”

Section: Simplified Numerical Modelmentioning

confidence: 99%

“…The term efficacy was used in order to determine the effectiveness of reinforcement [4][5][6][30][31][32][33]. Efficacy is the ratio between the load transmitted to the head of the pile and the total load on the unit grid.…”

Section: Simplified Numerical Modelmentioning

confidence: 99%

“…Okay and Dias [6] investigated cement and lime-treated soils used under structure foundations in order to homogenise settlements and establish a resistant base layer. Their numerical analysis showed the importance of the strength properties of the treated soils on the efficacy.…”

Section: Introductionmentioning

confidence: 99%

“…The loads are transferred on to the pile head by an arching mechanism in an earth platform located between the piles and the structure in order to reduce the pressure on the soft soil [1].The loadtransfer mechanisms depend on the soil properties and some geometrical parameters, such as the height of the earth platform and the spacing of the vertical rigid piles [2]. The efficiency of the load transfer mechanisms is defined as the ratio of the load supported by rigid piles over the total load applied to the reinforced soil [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Performance of Chemically Treated Natural Fibres and Lime in Soft Soil for the Utilisation as Pile-Supported Earth Platform

Anggraini

Asadi

Huat

et al. 2015

Int. J. of Geosynth. and Ground Eng.

View full text Add to dashboard Cite

This work presents the effect of lime and treated coir fibre on the mechanical behaviour of soft clay soil as a pile-supported earth platform. The experimental programme comprised three types of test (flexural strength, indirect tensile strength and triaxial compression strength). Experimental results were used in a numerical analysis in order to observe the performance of the treated soil as a load-transfer base layer depending on the height of the earth platform and the material properties of the treated soil. Two-dimensional physical model experiments were performed to validate the numerical model of the pilesupported load transfer platform. The numerical analyses showed the importance of the mechanical properties of the treated soils for the efficacy and effectiveness of the reduction of the settlement of the earth platform, as well as to enhance the bending performance of the earth platform. The efficacy of limed soil reinforced with chemically treated coir fibres is up to 30 % under various loadings of structures when the effective height of the earth platform is 0.3 m. The differential settlement at the elevation of the pile head is significantly reduced by up to 100 %. Present study concluded that this treatment technique can not only increase the mechanical performance of the coir fibres and lime-reinforced soil, but can also improve the interfacial mechanical interactions between the coir fibre surface and the soil particles, resulting in higher performance of the composites used as a pile-supported earth platform. KeywordsNatural fibre Á Lime Á Mechanical properties Á Numerical analysis Á Physical model Á Pile-supported earth platform List of symbols c 0 Cohesion (kPa) E Efficacy (%) ø 0 Effective internal friction (°) m Poisson ratio (dimensionless) P o The uniform pressure on geotextile (kPa) r s Pressure of soft soil ground midway between the pile heads (kPa) D Mid span deflection of earth platform (mm) E s Young's modulus of soft soil (kPa), H s Original thickness of soft soil (mm) H Height of earth platform (m) c s Unit weight of soil (kN/m 3 ) s Spacing between pile head (m) bDiameter of pile (m) qSurcharge load (kPa)

show abstract

“…The effect of pile installation was thus not taken into account. The soil and the pile are represented by volume elements [6].…”

Section: Simplified Numerical Modelmentioning

confidence: 99%

Section: Simplified Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance of Chemically Treated Natural Fibres and Lime in Soft Soil for the Utilisation as Pile-Supported Earth Platform

Anggraini

Asadi

Huat

et al. 2015

Int. J. of Geosynth. and Ground Eng.

View full text Add to dashboard Cite

show abstract

“…When the cement mortar is forcibly pressed into the soil, Ca(OH)2, CaO·SiO2·H2O, and CaO·Al2O3·H2O are quickly produced. Over time, cement becomes solid stone, with its strength increased after setting and hardening [27].…”

Section: Improvement Of Frictional Resistance and Tip Resistance For mentioning

confidence: 99%

Development and Prospect of Root Piles in Tunnel Foundation Reinforcement

Ding¹,

Su²,

Lai³

et al. 2017

CEJ

View full text Add to dashboard Cite

Over the past couple of decades, root piles as the new tool for addressing a number of tough problems have been gaining a continually increasing interest in tunnel, especially for complex geological conditions. Therefore, in order to promote the development and application of root piles in tunnel engineering, this paper systematically sorts out the research status and development prospect of root piles from the application in foundation underpinning to reinforcement of tunnel foundation. Firstly, the type and development process of root piles are discussed. Secondly, the reinforcement mechanism of the root piles in the tunnel base is refined and combed: the reinforcement mechanism analysis focuses on frictional resistance of soil around pile, soil among piles, and piles. Thirdly, the calculation method of reinforced tunnel foundation is studied from the bearing of vertical load, horizontal load and pile reinforcement design. And through the engineering case, the paper illustrates the reinforcement effect of the root pile in ensuring the stability of the tunnel and the concrete process of the root piles in the tunnel construction. Finally, the problem and development prospect of root piles are discussed, so as to provide new perspectives and fundamental data for the research on tunnel engineering.

show abstract