Design of Rigid Shafts in Clay for Lateral Load

Coyle, H M; Bierschwale, Mark W.

doi:10.1061/(asce)0733-9410(1983)109:9(1147)

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…Similar such variations in earth pressures are observed from a number of tests carried out using caisson models of increased L/D values of 3 and 4 (Figs. [17][18][19][20][21][22][23][24]. In these cases also, similarly large variations in deflections are observed at the ultimate stages.…”

Section: Mobilization Of Lateral Earth Pressure Under Static Loadsmentioning

confidence: 91%

“…According to Ivey and Dunlap [23], the ultimate load can be taken as the load causing a 5°rotation in the pile, where as Coyle and Bierschwale [24] suggested that the ultimate load is reached even at a rotation of 2°. In the same plots, lateral loads are also shown with respect to tilts expressed in degrees.…”

Section: Deflection and Tilt Of Caisson Under Lateral Loadsmentioning

confidence: 99%

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Earth pressures on caissons in marine clay under lateral loads — A laboratory study

Kumar¹,

Rao

2010

Applied Ocean Research

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Section: Mobilization Of Lateral Earth Pressure Under Static Loadsmentioning

confidence: 91%

Section: Deflection and Tilt Of Caisson Under Lateral Loadsmentioning

confidence: 99%

Earth pressures on caissons in marine clay under lateral loads — A laboratory study

Kumar¹,

Rao

2010

Applied Ocean Research

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“…Several authors, e.g., Poulos (1973), Coyle and Bierschwale (1983), Poulos (1995), Goh et al (1997), Chen and Poulos (1997), and Pan et al (2002), studied the problem associated with piles subjected to lateral loading due to soil movements. Poulos (1973) and Coyle and Bierschwale (1983) have treated the active piles as single piles and some correction factors are applied to incorporate the group effect.…”

Section: Available Methods To Estimate Forces On Piles or Shaftsmentioning

confidence: 99%

“…Poulos (1973) and Coyle and Bierschwale (1983) have treated the active piles as single piles and some correction factors are applied to incorporate the group effect. Because of the factors that affect the analysis and design of passive piles, and necessity to incorporate the effect of piles in row, solutions available for single piles may not be directly applicable.…”

Section: Available Methods To Estimate Forces On Piles or Shaftsmentioning

confidence: 99%

An Approximate Method to Determine Lateral Force on Piles or Piers Installed to Support a Structure through Sliding Soil Mass

Kumar

Hall

2006

Geotech Geol Eng

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Piles and drilled shafts are commonly used to stabilize potentially unstable natural and engineered slopes. Estimation of lateral pressures on piles or shafts used to stabilize potentially unstable sites continues to be a fundamental problem in geotechnical engineering. Several methods are available to estimate the lateral force on piles or drilled shafts used to stabilize a site. An approximate procedure to estimate the lateral force on drilled shafts supporting structures, i.e., installed at relatively large spacings on a potentially unstable site with a fixed slip surface is proposed, which is based on a widely referred theory of plastic deformation. Lateral pressures estimated using the method proposed show good agreement with a more rigorous method, which in turn has been reported to provide results close to field measurements. An approximate procedure to estimate a limiting (maximum) value of lateral pressure on shafts or piles when they are installed at close spacings is also proposed. Although, the limiting pressures estimated using the approximate procedure are in agreement with the pressures calculated using more rigorous method, verification of both methods with field measurements is recommended.

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“…According to Ivey and Dunlap (1970), the ultimate load can be taken as the load causing a 5 rotation in the pile, whereas Coyle and Bierschwale (1983) suggested that the ultimate load reaches even at a rotation of 2 . If 5 tilt is enough to reach the ultimate conditions, this load, thus arrived, can be compared with the ultimate values arrived at based on the other failure criterion.…”

Section: Effect Of S U On the Deflection And Ultimate Lateral Load Ofmentioning

confidence: 99%

Lateral Load: Deflection Response of an Embedded Caisson in Marine Clay

Kumar¹,

Rao²

2012

Marine Georesources & Geotechnology

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The authors refer to the laboratory testing carried out on model caisson embedded in marine clay collected from the Chennai coast in India. The response of lateral loadground level deflection of caissons under static and cyclic lateral loading is presented and discussed for the varied parameters such as caisson embedment depth ratio (L= D), load eccentricity ratio (e=D), and undrained strength (s u ) of clay. The results showed that as the caisson L=D increases, the lateral load required to cause a specified ground level deflection increases. At a given lateral load, the deflection levels are increased as the load eccentricity ratio increases from 0.5 to 2.0. As L=D increases from 2 to 3, the increase in the ultimate lateral capacity is found to be 1.8 to 2.0 times. Similarly, for the change in L=D from 3 to 4, this increase in capacity is found to be 1.6 to 1.8 times at all the undrained strength values and e=D values tested. From the cyclic load test results, it was noticed that the deflections mobilized at the cyclic load ratio (CLR ¼ 0.6) were so small and these are hardly 1% to 2% of the diameter of the caisson. A marked increase in the ground level deflection up to about 900 cycles was observed and thereafter the deflection almost remained the same.Keywords cyclic load ratio (CLR), embedment depth ratio (L=D), ground level deflection, load eccentricity ratio (e=D), ultimate lateral load, undrained strength (s u )

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Design of Rigid Shafts in Clay for Lateral Load

Cited by 7 publications

References 11 publications

Earth pressures on caissons in marine clay under lateral loads — A laboratory study

Earth pressures on caissons in marine clay under lateral loads — A laboratory study

An Approximate Method to Determine Lateral Force on Piles or Piers Installed to Support a Structure through Sliding Soil Mass

Lateral Load: Deflection Response of an Embedded Caisson in Marine Clay

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