Chapter 21 Ground improvement using deep vibro techniques

Raju, V. R.; Sondermann, Wolfgang

doi:10.1016/s1571-9960(05)80024-2

Cited by 15 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The soil compaction of a low-load-bearing capacity soil was a subject of many researches [1,2,3,4,5]. The following is stated in a number of scientific studies: as long as the stress-strain ratio of compound tension layers in non-uniform (two-layers) foundations increases due to interactions the thickness should decrease as well.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research of a Highly Compacted Soil Beds

Usmanov

Vatin

Murgul

2014

AMM

View full text Add to dashboard Cite

The clay loams of semi-solid consistency was tested under static loads. The test results have proved that high values of soil density can change operating conditions of artificial foundations significantly, i.e. a so-called plate effect can be observed. Due to high hardness values highly compacted soil beds allow distributing foundation loads on the considerable part of the area and reducing its value on the edge of the weak layer.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Research of a Highly Compacted Soil Beds

Usmanov

Vatin

Murgul

2014

AMM

View full text Add to dashboard Cite

show abstract

“…The quality (modulus) of stone column is crucial for the performance of the improved soft ground (Deb and Behera, 2016;Raju and Sondermann, 2005). In practice, the modulus ratio of column to clay is in the range of 10-40 (Hu, 1995, Kelly, 2014.…”

Section: Effect Of Modulus Ratio Spacing Ratio and Permeability Ratio 16mentioning

confidence: 99%

Consolidation Analysis of Soft Ground Improved by Stone Columns Incorporating Foundation Stiffness

2020

View full text Add to dashboard Cite

The consolidation of soft ground improved by stone columns is normally analysed under equal strain or free strain conditions. In this study a new consolidation model for stone columns is proposed to capture actual field conditions that lie between these two hypotheses, where a permeable foundation layer on top of the unit cell is introduced. By considering the stiffness of this layer, a closed-form solution can be derived, which indicates a considerable difference between the equal strain and free strain conditions. The influence of foundations with varying values of stiffness is examined, and the results demonstrate that as the foundation layer becomes stiffer, the time needed to achieve a 90% degree of consolidation decreases and so does the differential settlement, but the steady stress concentration ratio increases. This is also confirmed by a parametric study carried out under varying dimensionless ratios with respect to soil modulus, column spacing and permeability. A computational example is provided to show the implications of these results on actual design. Finally, a case study is presented to illustrate that the proposed model is able to provide more realistic predictions of settlement and stress concentrations on top of the unit cell.

show abstract

“…Stone column configuration considered for reinforcement effect a) Definition sketch, b) FBD of the Unit Cell (adapted from Poorooshasb et al, 2006) Figure 17. Use of vibro stone columns to mitigate liquefaction potential at Hazira LNG terminal, India (adapted from Raju & Sondermann, 2005) Figure 18. Use of stone columns for seismic retrofit against liquefaction for Tolt Regulating Basin South Dam (adapted from Mejia, 2005) Figure 19.…”

Section: Reinforcement Effectmentioning

confidence: 99%

“…To reduce overall settlement and to mitigate liquefaction potential in a possible seismic event for Hazira liquefied natural gas (LNG) terminal, located at an estuary on the west coast of the Khambhat Gulf in India, vibro stone columns were used (Raju & Sondermann, 2005). Figure 17 shows the two LNG tanks of diameter 84 m each founded on stone columns.…”

Section: Case Histories Of Granular Piles As Liquefaction Counter Mea...mentioning

confidence: 99%

Mitigation of Liquefaction Hazard Using Granular Piles

Krishna

2011

International Journal of Geotechnical Earthquake Engineering

View full text Add to dashboard Cite

In this paper, ground improvement techniques are used to mitigate liquefaction hazards. Granular piles are the preferred alternative due to several advantages. Granular piles improve the ground by reinforcing and adding density to the surrounding soil apart from providing drainage. Different mechanisms operate in the function of stone columns/granular piles in liquefaction mitigation, including Drainage, Storage, Dilation, Densification, and Reinforcement. This paper presents an overview of the use of granular piles as a liquefaction remedial measure for sand deposits. A brief description on liquefaction and the associated features is presented. A short discussion on various ground improvement methods available for liquefaction mitigation is discussed in light of the importance of granular piles. Different installation methods and design concepts for granular piles are presented. Various mechanisms of granular piles in mitigating the liquefaction potential of loose sand deposits are discussed and quantified in detail proving their effectiveness in hazard mitigation.

show abstract

Chapter 21 Ground improvement using deep vibro techniques

Cited by 15 publications

References 1 publication

Experimental Research of a Highly Compacted Soil Beds

Experimental Research of a Highly Compacted Soil Beds

Consolidation Analysis of Soft Ground Improved by Stone Columns Incorporating Foundation Stiffness

Mitigation of Liquefaction Hazard Using Granular Piles

Contact Info

Product

Resources

About