With the rapid expansion of urbanization, shafts are needed to provide access tunnelling projects or be utilized for permanent works. Their construction causes ground movements, affecting nearby foundations and buried infrastructure. This study presents an analytical equivalent volume loss approach predicting three-dimensional movements resulting from a circular shaft construction: namely, loss...

Temperature significantly affects the mechanical properties of geomaterials, particularly creep behavior soft clayey soils. Thus, an appropriate constitutive model to describe time-dependent stress-strain soils at various temperatures is necessary. This study performed temperature-controlled oedometer tests on two soils: Hong Kong marine deposit (HKMD) and kaolinite clay (kaolin). The thermally...

Alkali-activated materials (AAMs) and “geopolymers” are inorganic polymeric obtained by mixing of solid aluminosilicate precursors with an alkaline solution (generally, KOH or NaOH Na2SiO3 mixed in various ratios). This class has emerged as a greener alternative to traditional concrete, for large-scale well niche applications such conservation restoration built heritage. In this work we apply R...

Salinity is a major threat to the sustainability of irrigated agriculture in arid and semi-arid regions. Leaching primary measure for removing excess salts from root zone, but not all water applied soil surface contributes removal salts. In clayey soils, bypass flow along cracks can occur without being mixed with saline pore matrix. To present field dataset quantitatively evaluate contribution ...

Leaking underground storage tanks (USTs) containing gasoline represent a significant public health hazard. Virtually undetectable to the UST owner, gasoline leaks can contaminate groundwater supplies. In order to develop remediation plans one must know the extent of gasoline contamination. Centrifugal simulations showed that in silty and sandy soils gasoline moved due to the physical process of...

The National Forest Soil Inventory (NFSI) provides the Greenhouse Gas Reporting in Germany with a quantitative assessment of organic carbon (C) stocks and changes in forest soils. Carbon stocks of the organic layer and the mineral topsoil (30 cm) were estimated on the basis of ca. 1.800 plots sampled from 1987 to 1992 and resampled from 2006 to 2008 on a nationwide grid of 8 × 8 km. Organic lay...

The activity is related to the mineralogy and geological history of clays. Soils with same value liquidity limit or plasticity index can have very different characteristics depending on amount type clay minerals. methylene blue characterizes clays reflects surface activity. Ten inactive soils contain minerals (kaolinite, illite), these absorb little water. Two swelling normal are composed illit...

Accurate determination of soil parameters is great importance in the analysis landslides, which a common type natural disaster. In solution landslide problems, direct shear box test generally preferred as laboratory for strength soils. However, need drained long-term problems reveals disadvantageous aspect this experiment, especially clayey soils, because pore water pressures cannot be measured...