Anchoring strength parameter

Here 50 is the angle between the easy direction e and the director n at the nematic/wall interface. The anchoring strength parameter A determines the ability of the surface director to deviate from the easy direction. 

In Figs. 4 we plot the stretched exponential parameter m as a function of p and w. We do not observe any systematic changes in behaviour of m below and above the percolation threshold on varying p. Indeed, values of m are strongly scattered because the structural details of G r) are relatively weakly -dependent. The parameter m appears always to be essentially independent of the impurity concentration p. For h initial conditions it is also independent of the anchoring strength w. In all cases m is close to unity. Only for r initial conditions do we see any noticeable dependence on w. This dependence only occurs at low w, at increases m up to about 1.4. 

Here W2 is the strength of the interaction and Qs is the preferred value of the tensor order parameter at the substrate, located at z = zs- In the case of uniaxial nematic order the anchoring strength W2 can be related to the anchoring strength W for the bare director description as W = 3iC2 S. ... 

Nithiaraj, R., Ting, W.H. Balasubramaniam, A.S. 1996. Strength parameters ofresidual soils and apphcation to stability analysis of anchored slopes. Geotechnical Engineering, Dec 1996, SEAGS, Thailand. 27 (2). Ooi, T.A. Ting, W.H. 1975. The use of a light dynamic cone penetrometer in Malaysia. Proc. 4th SJi. Asian... 

Specific supporting parameters are illustrated in Figure 3 M24-22 mm x 2400-type anchor bolt which is composed of high strength twist steel and >17.8 mm x 6500-type anchor cable. The space between anchor bolts should be controlled at 800 mm x 800 mm. The pre-tension torque of the anchor bolts is designed to be more than 300 N m. Also, 12 rhombic metal mesh and W steel belt are used in the supporting system and the spray layer should be 30-50 mm thick. 

Clearly the ability of the geosynthetic to interface with the soil and be anchored by it is a key element in the transfer of the tensile force and hence performance of the reinforced soil structure. Thus soil-geosynthetic interaction, or interface friction, becomes critical as it governs the soil-fabric bonding strength. The required embedded length or bond length is determined by this parameter. 

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