A new method for single pile settlement prediction and analysis

Fleming, Wgk

doi:10.1680/geot.1993.43.4.615

Cited by 34 publications

(37 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pile load-displacement curves for the friction and end-bearing piles are shown in Figure 3, where they are compared with analyses using the CemSet method developed by Fleming (1992). The CemSet parameters used to re-produce the pile test response are summarised in (Selemetas, 2005).…”

Section: Pile Response During Initial Loadingmentioning

confidence: 99%

“…A simple assessment of the effects of tunnelling induced movements on the load distribution in a pile can be made by using the framework of Fellenius (1988) and the CemSet method by Fleming (1992). Figure 14 shows the key load changes for pile FC as presented in Figure 11b (when the EPBM face is beneath the pile and post tunnelling) compared with the envelope of theoretical ultimate shaft friction (USF) along the length of the pile, as back-calculated from the CemSet analysis carried out after the pile loading test.…”

Section: Pile Design For Piles Subjected To Tunnelling-induced Movementsmentioning

confidence: 99%

See 1 more Smart Citation

Response of full-scale piles to EPBM tunnelling in London Clay

Selemetas

Standing

2018

Tunnelling in the Urban Environment

View full text Add to dashboard Cite

The installation and working test performance of four full-scale instrumented driven piles and their subsequent response to twin tunnels constructed below the pile bases are described. One pair was designed to be largely friction piles and the other pair end-bearing.Their locations relative to the new tunnels were carefully chosen to optimise the understanding of pile response at varying offsets from the centre-lines. The site conditions and the greenfield response to EPBM tunnelling at the site were described in a companion paper that reported an expanding displacement field around the tunnels compared with contracting fields usually observed. Field monitoring results indicate that, during construction, zones of influence exist around tunnels (similar to those proposed by Kaalberg et al., 1999 andJacobsz et al., 2001), where the ground and piles are subjected to different degrees and senses of relative vertical displacement. Redistributions of load along the pile lengths occur as the tunnel boring machines approach, pass beneath and continue beyond the pile bases and lateral pile deflections and bending moments are also induced. Based on the results from this field study, implications for the capacity of existing piles (and design of new piles) subjected to tunnellinginduced movements are assessed for cases of expanding and contracting displacement fields.

show abstract

Section: Pile Response During Initial Loadingmentioning

confidence: 99%

Section: Pile Design For Piles Subjected To Tunnelling-induced Movementsmentioning

confidence: 99%

Response of full-scale piles to EPBM tunnelling in London Clay

Selemetas

Standing

2018

Tunnelling in the Urban Environment

View full text Add to dashboard Cite

show abstract

“…Non-cohesive soil 28: According to the calculation expression for drilled piles proposed by Fleming (1992), the unit tip resistance is 15 to 20% of the q c value when the tip deflection is 0·1D (D is pile diameter). The value of n ranges from 0·15 to 0·25, and the value for cohesive soil is slightly larger than that for sandy soil and silt.…”

Section: Pile Base Resistancementioning

confidence: 99%

CPT-correlated design method of open-ended concrete pipe pile

Liu¹,

Zhang²,

Yu³

2016

Proceedings of the Institution of Civil Engineers - Geotechnica

View full text Add to dashboard Cite

2 3An improved cone penetration test (CPT)-correlated design method is proposed for open-ended prestressed high-strength concrete pipe piles. The method takes the effects of compaction, plugging and friction fatigue into consideration. The evaluation proposal for shaft resistance introduces three parameters of stress reduction factor, compaction sensing coefficient and friction fatigue coefficient with their values addressed. The base resistance is divided into two parts of pile wall resistance and plug capacity, and is expressed in terms of the incremental filling ratio of the soil plug. The ratios of shaft and base resistance to CPT cone resistance, as well as the influence zone for end bearing, are determined. The rationality of this method is tested by comparing the calculated values with the results measured in field tests.

show abstract

“…Slow maintained load (ML) tests on piles in the field are generally carried out at a design load of twice the nominal working load for a period of a few days, so that a settlement criterion can be checked (Fellenius, 1980). Extrapolation techniques based on hyperbolic load-settlement relations have proved reasonably accurate and offer the opportunity to make settlement predictions after only 1 day of testing (Fleming, 1992). Faster constant rate of penetration (CRP) tests and quasi-dynamic tests rely on rate effect corrections, and generally require prior correlations with ML tests on the same soil (Brown et al, 2006).…”

Section: Uncertainties Due To Construction Sequencementioning

confidence: 99%

Bored pile design in stiff clay II: mechanisms and uncertainty

Vardanega

Williamson

Bolton

2012

Proceedings of the Institution of Civil Engineers - Geotechnica

View full text Add to dashboard Cite

The soil mechanics related to pile design in clay has been the subject of substantial engineering research. In a companion paper, various codes of practice were reviewed showing the effect on pile capacity of the different global factors of safety that emerge from the various partial factor combinations for the ultimate limit state.Factors of safety are generally specified based on the opinions of experts. In this paper an assessment will be made of various objective procedures that can be used to reduce uncertainty in the design process, especially regarding the adoption of a pile resistance model and the selection of a soil strength profile as part of a ultimate limit state check, and the estimation of pile head settlement in the context of a serviceability limit state check. It is shown that both total stress and effective stress calculation methods are applicable in London Clay.Estimates of settlement using a non-linear soil stress-strain relationship are made and compared with published data. It is shown that the compression of the concrete dominates the settlement of long piles. Given the low settlements observed, recommendations are made for a reduction in standard factors of safety for bored pile design in stiff clays.

show abstract

A new method for single pile settlement prediction and analysis

Cited by 34 publications

References 0 publications

Response of full-scale piles to EPBM tunnelling in London Clay

Response of full-scale piles to EPBM tunnelling in London Clay

CPT-correlated design method of open-ended concrete pipe pile

Bored pile design in stiff clay II: mechanisms and uncertainty

Contact Info

Product

Resources

About