摘要:

AbstractThe deflection of, and the pore pressure at, the surface of a saturated clay mass are computed by modelling the mass mathematically as a consolidationg half‐space. Specifically, attention is focused on the effect of a surface cover which impedes, though does not entirely prevent, the flow of the pore water. A number of results of interest are reported, generalizing work reported earlier by McNamee and Gibson

ISSN:0363-9061    

DOI:10.1002/nag.1610030102

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractAn effective solution procedure for the finite element analysis of free surface seepage problems is presented. The solution algorithm employs a non‐linear permeability description of the material and avoids iteration with the finite element mesh. The results and experiences obtained in the analyses of some problems are presented to demonstrate the usefulness of the techniqu

ISSN:0363-9061    

DOI:10.1002/nag.1610030103

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractTwo‐dimensional seepage from an array of triangular channels into permeable soil underlain at a finite depth by a drain has been solved by using the Baiocchi method. The use of this approach allowed a simple formulation of the seepage problem through extension of the solution region to ana prioriknown region. The new problem was treated numerically by using the S.O.R. method combined with projection. This technique proved to be very accurate when compared with analytical results and efficient from a computer programming standpoin

ISSN:0363-9061    

DOI:10.1002/nag.1610030104

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractAn examination has been made of the behaviour of a finite layer of elastic material of constant Poisson's ratio, whose Young's modulus increases linearly with depth, and which rests on a rough rigid base. Values of surface settlement at the corner of a rectangular area of uniform loading are presented for values of Poisson's ratio of\documentclass{article}\pagestyle{empty}\begin{document}$ \frac{1}{2} $\end{document},\documentclass{article}\pagestyle{empty}\begin{document}$ \frac{1}{3} $\end{document}and 0, and for wide ranges of degree of inhomogeneity and loading breadth to depth ratio.

ISSN:0363-9061    

DOI:10.1002/nag.1610030105

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractIn a previous paper it was established with very simple assumptions that piles might undergo a directional instability during placement, of a type more usually found in aerodynamic problems. The study is here extended to piles driven into soils whose shear strength and lateral reaction modulus can vary with depth. The analysis consists of a parametric study of the effect of linear variation of the soil parameters with depth on the critical lengths for instability, and a comparison of site evidence with the critical lengths obtained from a stepwise‐constant representation of the variation of soil parameters with depth. The theory is shown to give very reasonable estimates of the depths at which major deviation starts, although there is a pressingneed for more detailed site and laboratory dat

ISSN:0363-9061    

DOI:10.1002/nag.1610030106

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractProblems of a raft on a visco‐elastic continuum may be converted to equivalent elastic problems by means of a Laplace transformation. In this paper a numerical solution of the equivalent problem is obtained by finite element or other techniques. This solution is converted into the form of an eigenvector expansion and then transformed into a numerical solution to the original problem by inverting the Laplace transform. This form of solution has the advantage of applying to any visco‐elastic model, and of requiring little additional computation as a result of changing the visco‐elastic model, the relative raft‐soil stiffness or the load pattern.The application of the method is illustrated by results for circular rafts, strip footings of finite length and rectangular rafts, and particular attention is paid to a realistic soil creep function which is asymptotic to a linear function of l

ISSN:0363-9061    

DOI:10.1002/nag.1610030107

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

摘要:

AbstractA simple and analytical method of solving the problem of heat extraction from a penny‐shaped crack having both inlet and outlet holes is developed by using a two‐dimensional flow model when fluid is injected at a constant flow rate. Temperature distributions in both rock and fluid are obtained by taking into account the hydraulic and thermal growth of the crack. The outlet fluid temperature and energy extraction rate versus time are shown by some illustrative examples. Although the effect of thermal, contraction of rock upon the crack width is large, its influence upon flow rate and crack tip stress intensity factor is sufficiently small within the first several years so that the crack radius can be determined mainly by the mechanical deformation of, the r

ISSN:0363-9061    

DOI:10.1002/nag.1610030108

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610030109

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610030110

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY

ISSN:0363-9061    

DOI:10.1002/nag.1610030111

出版商:John Wiley&Sons, Ltd    

年代:1979

数据来源: WILEY