This paper proposes a rigorous undrained solution for cylindrical cavity expansion problems in K0-consolidated clays, adopting simple non-associated and anisotropic model, SANICLAY. The theory is well extended to consider non-associativity, K0-consolidation stress-induced anisotropy with combined rotational distortional hardening of yield surface plastic potential the multiaxial stress space. developed can be recovered validation against modified Cam-clay (MCC) by simply setting model...

Abstract Conventionally, foundations have been classified as shallow or deep in routine civil engineering practice. However, due to recent developments, two other approaches, semi‐deep and ground modification foundations, are now available, complicating foundation categorization. Accordingly, a new concept for categorization is introduced this paper based on insights into the theory of structure analysis. Based form aspect, systems can be categorized one‐dimensional (linear), two‐dimensional...

Cavity expansion theory plays an important role in many geotechnical engineering problems, including the cone penetration test (CPT). One of challenges interpreting CPT data is delineation interfaces between soil layers and identification distinct thin layers, a process which relies on in-depth understanding relationship penetrometer readings properties. In this paper, analytical cavity solutions two concentric regions are applied to interpretation data, with specific focus layered effects...

The cavity-contraction method has been used for decades the design of tunneling and prediction ground settlement by modeling cavity-unloading process from an in situ stress state. Analytical solutions undrained cavity contraction a unified state-parameter model clay sand (CASM) are developed this paper to predict soil behavior around tunnels. overall under both drained loading conditions could be properly captured CASM, large-strain effective-stress analyses provide distributions...

This paper presents an analytical solution for drained expansion in both spherical and cylindrical cavities with a unified state parameter model clay sand (CASM). The developed here provides the stress strain fields during of cavity from initial to arbitrary final radius. Small strains are assumed elastic region large applied soil plastic by using logarithmic definitions. Since its development, CASM has been demonstrated many researchers be able capture overall behaviour under undrained...

This paper presents a new analytical solution for undrained expansion of spherical and cylindrical cavities in soils with unified state parameter model clay sand (CASM). Large strain effective stress solutions are derived the elastic, plastic critical-state regions. The key advantage using CASM is that it can both generally able to capture overall soil behaviour as observed laboratory. newly developed provides fields during cavity from an initial final radius. Following validation original...

A cavity expansion-based method is proposed in this paper to correlate the relevant findings with piezocone penetration test (CPTu) data clays. The rigorous and explicit solution for both spherical cylindrical undrained expansion adopted based on a unified critical state constitutive model clays sands. analogous developed comprehensively validated against two series of advanced numerical simulations calibration chamber tests CPTu fine-grained soils, along bias analyses. effects...

Penetration problems are important in many areas of geotechnical engineering, such as the prediction pile capacity and interpretation situ test data. The cone penetration is a proven method for evaluating soil properties, yet relatively little research has been conducted to understand effect layering on penetrometer readings. This paper focuses probe within layered soils investigates effects both resistance deformation. A series centrifuge tests was performed configurations silica sand with...

Lunar in-situ resource utilization (ISRU) has been put on the agenda by many countries. Due to special material nature and low gravity environment, lunar regolith demonstrates significantly different behavior from terrestrial geomaterials. However, systematic understanding of its geotechnical is now seriously restricted scarcity difficulty in simulating gravity. A new simulant, termed as China University Mining Technology Number One (CUMT-1), developed recover properties simulate adopting...

SUMMARY An analytical solution of cavity expansion in two different concentric regions soil is developed and investigated this paper. The embedded within a with finite radial dimension surrounded by second soil, which extends to infinity. Large‐strain quasi‐static both spherical cylindrical cavities elastic‐plastic soils considered. A non‐associated Mohr–Coulomb yield criterion used for soils. Closed‐form solutions are derived, provide the stress strain fields during from an initial final...

Summary A cavity expansion–based solution is proposed in this paper for the interpretation of CPTu data under a partially drained condition. Variations normalized cone tip resistance, factor, and undrained‐drained resistance ratio are examined with different initial specific volume overconsolidation ratio, based on exact solutions both undrained expansion CASM, which unified state parameter model clay sand. drainage index to represent condition, critical after stress paths therefore...

Cone tip resistance and excess water pressure (EWP) measured by piezocone penetration tests (CPTU) may be significantly affected the partially drained effect in soils with intermediate permeability. To capture this effect, paper proposes a straightforward, hydro-mechanical coupling solution for cylindrical cavity expansion under conditions. The mechanical behaviour of is modelled using elastoplastic Tresca model flow within porous assumed to obey Darcys law. Two partial differential...

To provide precise prediction of tunnelling-induced deformation the surrounding geomaterials, a framework for derivation rigorous large-strain solutions unified spherical and cylindrical cavity contraction is presented description confinement-convergence responses deep tunnels in geomaterials. Considering large deformation, logarithmic strains are adopted analyses linearly elastic, non-associated Mohr–Coulomb, brittle Hoek–Brown media. Compared with approximate solutions, approximation error...

Many geotechnical scenarios involve cavity unloading from a loaded state, particularly in pressuremeter tests, and the data of tests has exceptional attraction as it is less disturbed by insertion process. However, analyses for continuous loading (i.e., initially experiences expansion then contracts) critical state soils are rarely studied. To this end, novel semi-analytical solution based on unified parameter model clay sand (CASM) proposed whole expansion–contraction spherical cylindrical...

Bearing capacity of energy piles may be affected by the Radial Interaction between Energy Piles and Soils (RIEPS) such as pile expansion transient radial heat conduction. This paper proposes a cavity-expansion-based solution to investigate thermo-elastic RIEPS. Transient temperature distributions are shown assuming conduction in direction constant at pile-soil interface. With distributions, is obtained capture changes stresses displacements around piles. It found that under combined...

This paper is prepared in honour of Professor E.T. Brown for his outstanding contributions to rock mechanics and geotechnical engineering also personal influence on the first author's research career geomechanics engineering. As a result, we have picked topic that reflects two key areas which has made seminal over long distinguished career. These are concerned with application critical state concept modelling geomaterials analysis underground excavation or tunnelling geomaterials. Partially...