Static Capacity Prediction by Dynamic Methods for Three Bored Piles

Briaud, Jean‐Louis; Ballouz, Marc; Nasr, George

doi:10.1061/(asce)1090-0241(2000)126:7(640)

Cited by 37 publications

(11 citation statements)

References 4 publications

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“…The load is transmitted through the wall panel and decreases from top to bottom. The axial load distribution confirms the general trend of the bored pile [7][8][9][10] . The vertical load is the sum of the toe resistance load and the skin friction resistance load.…”

Section: Load Distribution Along the Diaphragm Wallsupporting

confidence: 76%

Vertical bearing behavior of cast-in-place diaphragm wall in Shanghai

Hou

Wang

Chen

et al. 2010

J. Shanghai Jiaotong Univ. (Sci.)

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When diaphragm wall is used as the permanent vertical bearing structure, design standard of the bored pile adopted has to induce the risk or iste. The vertical load transfer mechanism and bearing capacity of the diaphragm wall are examined by a field testing program at the site in Shanghai soft clays. Test results indicate that the diaphragm wall almost behaves as a rigid body under the vertical load. It induces that the skin friction and the toe resistance of the wall develop simultaneously. The skin friction resistance carries the large portion of the vertical load, and the toe resistance of the wall provides about 9.2% of vertical bearing load. Toe-grouting technique is found to achieve a remarkable increase in skin friction and toe resistance. The toe resistance of the grouted wall provides about 17.5% of vertical load.

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Section: Load Distribution Along the Diaphragm Wallsupporting

confidence: 76%

Vertical bearing behavior of cast-in-place diaphragm wall in Shanghai

Hou

Wang

Chen

et al. 2010

J. Shanghai Jiaotong Univ. (Sci.)

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“…But usually these investigations are not sufficient for an entire and realistic capture of the complex conditions, caused by the interaction of subsoil and construction (Katzenbach, 2005). In order to reliably determine the ultimate bearing capacity of piles, load tests need to be carried out (Briaud, Ballouz & Nasr, 2000). For pile load tests often very high counter weights or strong anchor systems are necessary.…”

Section: In-situ Pile Load Testsmentioning

confidence: 99%

Safety and quality assurance for geotechnical constructions in urban areas

Leppla¹,

Katzenbach²

2019

Modern Building Materials, Structures and Techniques (MBMST)

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Safety and quality assurance are the most important aspects for the design and the construction of geotechnical structures. These aspects consider the optimisation by reducing the resources material, money and time. For construction projects with a distinctive soil-structure interaction in the vicinity of existing structures special methods have to be applied to guarantee safety and quality. Therefor numerical simulations using the Finite-Element-Method (FEM), insitu load tests on the construction site, special foundation techniques like the Combined Pile-Raft Foundation (CPRF), the observational method and an independent peer review are necessary. The paper explains the application and the combination of these tools by examples from engineering practice.

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“…Baker et al (1990) performed a series of tests sponsored by the FHWA on 0.9 m diameter bored piles in clay and sand. (The tests are also reported by Briaud et al, 2000). Of interest for the subject topic are the static loading tests on two piles The piles were instrumented with strain gages.…”

Section: Test On Instrumented Bored Pilesmentioning

confidence: 99%

Determining the True Distributions of Load in Instrumented Piles

Fellenius¹

2002

Deep Foundations 2002

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Tests on piles-driven or bored-sometimes include instrumentation for determining the load distribution. The instrumentation can range from a telltale or two through a sophisticated array of strain gages, and from tests with the limited purpose of separating shaft and toe resistances through tests for the purpose of detailing the shaft resistance distribution along the pile. Most of the time, the measurements are analyzed from the assumption that the "zero readings", which are the readings taken at "zero" time, i.e. at the outset of the test, also have registered "zero" load. This assumption is more than a little off. It neglects the existence of locked-in loads-residual load-in the pile and is one of the sources of the myth of the so-called "critical depth". Neglect of the residual load distribution is also the main reason for conclusions of instrumented tests that suggest shaft resistance to be smaller when the pile is loaded in tension as opposed to when it is in loaded in compression. Neglecting residual load negates the primary objective of instrumenting a test pile. This paper presents examples of measured distributions of residual load and true resistance, and indicates how to determine the distribution of residual load from measurements when the residual load distribution is not measured directly.

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Static Capacity Prediction by Dynamic Methods for Three Bored Piles

Cited by 37 publications

References 4 publications

Vertical bearing behavior of cast-in-place diaphragm wall in Shanghai

Vertical bearing behavior of cast-in-place diaphragm wall in Shanghai

Safety and quality assurance for geotechnical constructions in urban areas

Determining the True Distributions of Load in Instrumented Piles

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