tunnelling through cities underlain by soft soil, commonly associated with soil movement around the tunnels and subsequent surface settlement. the predication of ground movement during the tunnelling and optimum support pressure could be based on analytical, empirical or the numerical methods. the commonly used earth pressure balance (epb) tunneling machines, uses the excavated soil in a pressu...

The effect of the inertia term on longitudinal displacements an underground pipeline is shown for various cases pipe fastening when a seismic wave propagates along its axis. problem solved by analytical and numerical methods. pipe-soil interaction assumed to be elastic (shear stress generated in soil proportional relative displacement between soil).

Recent studies have shown that unsaturated soils lead to greater lateral pile capacity. This study aims experimentally assess how suction stress affects the response of piles in cohesionless soil. Two centrifuge tests were performed at 50 g evaluate effect Lateral loads applied monotonically on a single free-head displacement-controlledmanner maximum head displacement 0.44 m. The first test was...

Determination of soil shear strength is essential for engineering construction. Using rice husk ash (RHA) with cement in the a potential ground improvement technique that can reduce environmental problems and construction budget. In present study, ten combinations soil-RHA-cement were investigated to understand effects RHA on parameters soil. The admixtures prepared by taking 5%, 10%, 15% RHA, ...

It is reported that the inclined pile could be either beneficial or detrimental for abutment they support in condition of liquefaction—induced lateral displacement. To clarify effect on seismic response bridge abutments undergoing displacement, numerical analyses were carried out damaged was supported by piles and displaced riverwards 100 mm–150 mm due to soil liquefaction during 2011 Great Eas...

[1] For hillslopes undergoing ‘‘diffusive’’ soil transport, it is often assumed that the soil flux is proportional to the local land-surface gradient, where the coefficient of proportionality is like a diffusion coefficient. Inasmuch as transport involves quasirandom soil particle motions related to biomechanical mixing and similar dilational processes, a slope-dependent relation arises from a ...

In experiments carried out in greenhouses, some authors have shown that ammonium sulphate induces greater soil acidity and salinity than other sources of N. Moreover, nitrif ication inhibitors (NI) tend to cause ammonium to accumulate in soil by retarding its oxidation to nitrate. This accumulated ammonium would also have an effect on soil salinity. Consequently, the aim of this paper was to ev...