... ABSTRACT: This paper investigates the friction properties of the soil-geocell interfaces through direct shear tests. The geocells were formed using geogrids in the bottom half of the direct shear box having inside clear plan dimensions of 300 mm ´ 300 mm and depth of top and bottom boxes 110...

... proposed design method. The new design method considering both the drainage and reinforcing functions of the geocomposites. embankment slope gradient safety factor interface drainage stability analysis non-woven fabric direct shear test new design method consolidation time earth fill...

... especially in the rainy season. In addition, stones will get pushed into the weak subgrade. Geotextiles have been successfully used to improve the overall stability and trafficability of unpaved roads. Placed at the interface of the base layer and the subgrade, geotextiles perform separation, reinforcement...

... of the soil-bolt interface, which corresponds better to the reality. The interface behaviour is simulated by an elastic-perfectly plastic constitutive relation; interface sliding intervenes when the shear stress reaches the bond strength. This new feature allows notably a more correct estimate of the bolt...

... on the behavior of soil-geotextile interaction and the stability of the revetment system. This apparatus is capable of simulating cyclic flow conditions normal to the soil-geotextile interface. Two series of tests have been conducted using this apparatus and preliminary test results are presented and discussed...

... interface in pile rock sockets subjected to axial loading. Through laboratory testing, this work is being extended to the shear response of rock joints. A series of direct shear tests have been conducted on Melbourne Mudstone. Comparison of results from these tests with predictions from the shear model...

... shaft resistance construction skin friction interface concrete pressure friction angle LARGE DIAMETER BORED PILES FOUNDED IN HONG KONG DECOMPOSED GRANITE S-C.R. Lo1, and K.S. Li2 ABSTRACT Full scale load test data give very variable and sometimes very low shaft resistance for large diameter...

... ABSTRACT: This paper presents a numerical method based on the upper bound theory of Plasticity. The method is an extension of the two-dimensional approach developed by Donald and Chen (1998). The failure mass is divided into a number of prisms with inclined interfaces. It has been found...

... interfaces using a hardening elasto-plastic model. calculations are performed by a computer program that, in each analysed (cylindrical) failure surface, compares acting and failure tangential forces, obtained from the results of the numerical model and strength characteristics of the materials...

... Upstream Oil & Gas displacement element tangential stress tangential stress Reservoir Surveillance heat source laplace inversion scheme boundary element method principal stress production control reservoir simulation quadratic element non-homogeneous rock media elzein interface...

... ABSTRACT: Concentrated leaks at core-filter interfaces in earth dams increase erodibility of soils, which may lead to catastrophic failures. In this paper, a mathematical method is suggested to determine the self-healing nature of these leaks, which considers the erodibility of base soils...

... ABSTRACT: The failure of the Kettleman Hills landfill slope in 1988 resulted in significant movements of the waste pile of the order of 10.5m and settlements up to 4.5m. Subsequent investigations of the failure indicated that the slide occurred along the interfaces of the multi-layered liner...

... adhesion adhesive shear strength steel surface contact time interface THE ADHERENCE OF CLAY TO STEEL SURFACES André R. Zimnik1, Lennart R. van Baalen2, Peter N.W. Verhoef3, Dominique J.M. Ngan-Tillard4 ABSTRACT Recently the first full face tunnel boring machines were used in the Netherlands. Several...

.... Reservoir Characterization surface displacement criterion discontinuity reservoir geomechanics thermal elasto-plastic rock plastic radius compatibility condition Upstream Oil & Gas strength Rock mechanics tangential stress interface elasto-plastic interface displacement flow rule plastic...

... oriented single interfaces of variable frictional characteristics. Physical models of circular openings in simulated highly stressed formations have been revelq:ed and tested to investigate: the secondary stress regime the modes of deformation the failure mechanisms the material / lining...

... ABSTRACT: The radial tensile bond stress at the interface between an epoxy solid inclusion stress cell and the host rock has been examined by laboratory simulation of overcoring stress relief in an attempt to detect tensile failure. Although expected in theory, no bond failures were observed...

... are described. Lining prestressing using Interface grouting was carried out to minimise the potential for cracking and inhibit deterioration of the rock due to the frequent pressure fluctuations within the waterway. The behaviour of the lining during watering up was monitored and compliance with the design...

... investigation limestone pilot stretch pd-1 pressure tunnel grout construction Reservoir Characterization design concept concrete lining rock mass Upstream Oil & Gas tunnel borehole lining strain release interface cross section stress analysis deformation permeability SOME RESULTS...

... ramp 5 interface bedding parting fracture seam pile failure cross-section basal plane Proceedings of the International Symposium on Weak Rock / Tokyo /21-24 September 1981 Characteristics of spoil pile failures in a strip coal mine Theme 2 in Tertiary and Permian sediments V.U.NGUYEN CSIRO...

..., that depend only partially on existing planes of weakness. In the numerical procedure the rock mass is divided up into discrete elements governed by the assumed internal slip surfaces. The basic formula mentioned above is then applied to each element separately. The internal forces acting on the interfaces...