Dam foundations are generally affected by water leakage and seepage, posing a significant threat to the structure's safety. Such an artificial reservoir unconditionally assumes watertight foundation, as perfect possible, ensure its stability. This brings us back thinking about adequate treatment of foundation through injections grout curtain, which ensures watertightness ground good drainage sy...

considering the seepage and choosing an efficient sealing method is very important in dam projects. this issue has a close relationship with engineering geological properties of the dam site. chapar-abad dam is an inhomogeneous earth-fill dam of 44.5 meters height, crest length about 427 meters and a reservoir capacity of 127 million cubic meters. the dam project is under construction and is lo...

In this study, four types of grout were developed to evaluate the effect of grouting of saturated riprap layers on ground water flow. The developed types of grout are divided into a quick-setting type and a general-type, and also into high and low viscosities. A number of grout tests were performed in a model acrylic chamber, 0.4 m in diameter and 2.0 m in length, for visual observation of inje...

In the past thirty years many mining projects in Chile and Peru have used: (i) polymeric geomembranes (ii) design-and-build cutoff trenches, plastic concrete slurry walls, grout curtain systems to control seepage at tailings storage facilities (TSFs). Geosynthetics are a viable alternative TSF dam for clay cores or impermeable materials, mainly because of their marked advantages cost, installat...

The 300 m-level high arch dams built in China have different degrees of valley-narrowing deformation the initial impoundment. This unexpected phenomenon may increase long-term safety risk dams. There are several explanations for phenomenon, and one explanations—that it is caused by a drop bedrock temperature—is still under debate. In this paper, coupled thermo-hydromechanical (THM) simulations ...

To improve the corrosion protection provided to prestressing strands, anti-bleed grouts are used to fill voids in post-tensioning ducts that result from bleeding and shrinkage of older portland cement grouts. Environmental differences caused by exposing the strands to dissimilar grouts, however, have the potential to cause rapid corrosion. Portland cement grout, gypsum grout, and four commercia...

Chemical grout use began seriously some thirty years ago with the use of only a few types; silicates, acrylamide, epoxy, and some fatty acid derivates. Since then, the kinds of grout have proliferated with some of the originals still there, others dropping out entirely, and still others changing in type. This paper is about the current uses of chemical grouts, the economics of product use, and ...

Bio-grout, a new ground improvement method, has been recently developed to improve the mechanical properties, decrease the permeability of porous materials, reinforce or repair cementitious materials and modify the properties of soil or sand. Bio-grout production depends on microbially induced calcite precipitation (MICP), which is driven mainly by an enzyme, urease. However, urease-based MICP ...