... H s D tan ⁡ Ψ E 11 07 2021 04 08 2021 © 2022 Thomas Telford Ltd 2022 Bayesian back-analysis footings/foundations in situ testing Markov chain Monte Carlo offshore engineering penetrometers punch-through sand-over-clay site investigation...

.... anchors & anchorages in situ testing penetrometers piles & piling The first example outlined in Fig. 1(b) is for a bio-inspired solution for geotechnical engineering interfaces that mobilise directionally dependent interfacial friction. These surfaces are inspired by the belly scales...

... for saturated geomaterials so σ′ = σ − u_w. laboratory tests partial saturation penetrometers pore pressures shear strength suction A fall cone test (FCT) usually involves releasing a calibrated metal cone from the surface of a remoulded and saturated soil...

...Shiao Huey Chow; Conleth D. O'Loughlin; Zefeng Zhou; David J. White; Mark F. Randolph This paper describes a centrifuge study using a range of penetrometer tests (T-bar, piezocone and free-fall piezocone) to explore strength changes in a reconstituted, normally consolidated, natural calcareous silt...

... 31 10 2018 12 08 2019 © 2019 Thomas Telford Ltd 2019 clays model tests penetrometers piles & piling silts Factors affecting the unit shaft friction (τ_{f) developed on bored piles in intermediate soils, such as silts and clayey sands, have received little}...

... penetrometers permeability silts In intermediate permeability soils, transient drainage conditions affect in situ test results (e.g. Randolph & Hope, 2004 ; Schnaid et al., 2016). For the particular case of piezocone tests, the standard rate of penetration of 20 mm/s leads to drained...

... laboratory tests penetrometers shear strength statistical analysis The fall-cone test is mostly used as a standardised test for the determination of the liquid limit (BS 1377-2 (BSI, 1990a)). However, the undrained shear strength (which in this paper refers to the remoulded undrained shear...

...Bin Zhu; Jialin Dai; Deqiong Kong T-bar penetrometers are commonly used for the measurements of undrained strength profiles for clay (e.g. intact shear strength, sensitivity, ductility). The adoption of a constant resistance factor in the absence of a full-flow failure mechanism, coupled...

... chemistry, this suggests that the soil strength arises from a structural matrix of biofilm adhering to the clay and microfossil particles, which is enhanced by cross-linking due to the presence of multi-valent cations in the local water. Laboratory-scale piezocone, piezoball and T-bar penetrometer tests...

... geometric effects, particularly internal voids and end effects for the cone penetrometer. Finally field data are presented for the T-CPT and compared with results from in situ needle probe tests and laboratory tests on sampled material. The interpretation model is able to provide thermal conductivity values...

... be detected from the depth–resistance trace measured using a penetrometer with an adapted blade-shaped tip. Theoretical models exist to predict both forces and root displacements associated with root failure in either bending or tension. However, these studies were performed in dry sand under laboratory...

... loading (e.g. windthrow of trees). However, these are difficult to measure without time-consuming sampling or counting procedures. Previous studies proposed using a penetrometer with an adapted geometry, and showed that individual root breakages could be detected as sudden drops in penetrometer resistance...

...S. H. Chow; C. D. O'Loughlin; D. J. White; M. F. Randolph Seabed strength may be determined rapidly using free-fall penetrometers as the tool is simply released from above the sea-floor and penetrates under gravity into the seabed. The speed and ease of deployment relative to conventional ‘push...

... in a penetrometer test can be accurately described by the solution of a viscous-flow problem (Randolph & Houlsby, 1984 ; Murff et al., 1989). A typical value of N_k,T-bar is 10·5. The remoulded shear strength (s_{u,rem) of a soft clay can also be obtained from}...

..., laboratory and in situ testing campaigns have been performed to characterise the material properties of the soil. High-quality laboratory testing has been performed at one location through the soil profile and a range of geophysics, cone penetrometer, seismic dilatometer, shear vane and permeability tests...

... in a series of inverse analyses that calculate the undrained shear strength profile from acceleration data measured in free-fall sphere tests. The good match between these profiles and those obtained from ‘push-in’ piezoball penetrometer tests points to the potential for an instrumented free-fall sphere...

...C. Colreavy; C. D. O'loughlin; M. F. Randolph The piezoball, a ball penetrometer featuring pore pressure measurements, is a relatively new device that is potentially superior to the more commonly used piezocone for profiling fine-grained soils. This is due to lower uncertainty in how to derive soil...

...H. Mahmoodzadeh; D. Wang; M. F. Randolph Full-flow penetrometers such as the cylindrical T-bar and spherical ball are now being used widely in soft seabed sediments due to their advantages of larger projected area and minimal correction for overburden pressure. A ball penetrometer fitted with one...

... clays offshore engineering penetrometers pore pressures shear strength Seabed characterisation using conventional in-situ tools such as cone and full-flow penetrometers (T-bar and ball) typically involves large, dedicated vessels that are capable of deploying heavy seabed reaction frames...

... allowing quantitative treatment of the difference in coefficients of consolidation derived from laboratory oedometer or in-situ dissipation testing. The effect of partial consolidation during the penetration phase is also considered. clays consolidation finite-element modelling penetrometers silts...