Application of New Theories and Technology for Grouting of Dams and Foundations on Rock

Stille, Håkan; Gustafson, Gunnar; Hässler, Lars

doi:10.1007/s10706-012-9512-7

Cited by 79 publications

(33 citation statements)

References 23 publications

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“…From a theoretical basis, Brantberger et al (2000) proposed an equation for p g,max and Stille et al (2012) modified this equation by including groundwater pressure as follows:…”

Section: Observational Methods and The Real Case In Comparisonmentioning

confidence: 99%

Using Observational Method to Manage Safety Aspects of Remedial Grouting of Concrete Dam Foundations

et al. 2016

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“…From a theoretical basis, Brantberger et al (2000) proposed an equation for p g,max and Stille et al (2012) modified this equation by including groundwater pressure as follows:…”

Section: Observational Methods and The Real Case In Comparisonmentioning

confidence: 99%

Using Observational Method to Manage Safety Aspects of Remedial Grouting of Concrete Dam Foundations

et al. 2016

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“…Grouting is widely used to seal tunnels and improve rock conditions under dams and foundations and, in this regard, various grouting materials have been developed [1,2]. Several grouts with Newtonian behaviour, such as silicates and acrylates, have been used for a long time.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on Diffusion Process of Grout With Newtonian Behaviour in Rectangular Plane Fissure

Luo¹,

Li²

2017

Topics in Civil, Environmental &Amp; Building Engineering (TICEBE)

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Grouting is widely used to reduce water flow through rock masses and improve in situ rock quality. In recent decades, there has always been a significant requirement to understand the mechanism behind grout spread in jointed rock. In this study, the flow process of a Newtonian grout in a rectangular plane fissure initially filled with air is numerically investigated by using the finite volume method (FVM) and the volume of fluid (VOF) technique. The results show that before the flow front reaches the side wall, the grout movement exhibits a radial flow, and after that, the grout flow direction changes and it flows along the y-direction, parallel to the side wall, with an uneven flow front. With the gradual increase of grout propagation length, the flow front tends to be flat and finally becomes a horizontal straight line. The pressure gradient of the flow field continuously decreases with the enlargement of grout spread area, as results in a rapid decline of grout rate.

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“…The ordinary applied pressure of 15 bar in Short slot, however, is considerably higher than the other two instruments (Draganovic and Stille 2011). It is well known that the grout penetrability is improved by increasing the pressure (Eriksson et al 1999;Hjertström 2001;Nobuto et al 2008;Draganovic and Stille 2011;Stille et al 2012). Therefore, the penetrability measurement is undeniably dependent on the grouting pressure and the experiments on identical grout samples under different pressures should definitely reveal diverse or even contradictory results.…”

Section: Introductionmentioning

confidence: 99%

Uncertainties in Grout Penetrability Measurements; Evaluation and Comparison of Filter pump, Penetrability Meter and Short Slot

et al. 2017

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To measure grout penetrability in fractured hard rock, various measuring instruments have been developed over the years. Penetrability meter and Filter pump have been designed to use in both the lab and the field. Short slot has been applicable mainly in the lab due to its complexity. The fact, that these instruments have been built based on different assumptions, limitations, and test conditions, makes their results occasionally in contradict. Deficiency in design of the instruments as well as the methods of evaluating grout penetrability is additionally a basis for uncertainty in results. This study is an experimental effort to determine and thoroughly perceive the nature of the most governing uncertainties in grout penetrability measurements. The test apparatus, procedure, and method used to evaluate the grout penetrability in both Penetrability meter and Filter pump were thus modified. The aim was to control the corresponding uncertainties and make their limitations and test conditions as similar as possible with the ones in Short slot. The results suggested that to obtain a more realistic evaluation of the grout penetrability, measurement should be accomplished at both the high and the low pressures with sufficient grout volume using Short slot. Moreover, application of both Filter pump and Penetrability meter is no longer recommended due to the revealed uncertainties.

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Application of New Theories and Technology for Grouting of Dams and Foundations on Rock

Cited by 79 publications

References 23 publications

Using Observational Method to Manage Safety Aspects of Remedial Grouting of Concrete Dam Foundations

Using Observational Method to Manage Safety Aspects of Remedial Grouting of Concrete Dam Foundations

Numerical Analysis on Diffusion Process of Grout With Newtonian Behaviour in Rectangular Plane Fissure

Uncertainties in Grout Penetrability Measurements; Evaluation and Comparison of Filter pump, Penetrability Meter and Short Slot

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