...Tong Chen; Fanyan Meng; Yaofeng Tang; Zhengfan Chen; Renpeng Chen Long-term settlement of shield tunnels in soft soil is difficult to control by grouting reinforcement owing to uncontrolled grout diffusion and significant soil disturbance. This study proposes a capsule expansion–electro-osmosis...

... additional settlement. Lid contact is usually ensured by underwater grout injection, albeit this has a significant impact on the duration and costs of installation. Although grouting is routine, there are limited available data regarding the benefits of ensuring contact between the lid and the soil...

... of cemented clay is devised. The model is validated by experimental results on specimens of cemented clay from various sources. ground improvement grouting laboratory tests soil stabilisation stiffness Soft ground can be stabilised by the techniques of deep cement mixing (e.g. Horpibulsuk...

...Y. Pan; Y. Liu; E. J. Chen This study examines the effect of geometric imperfections arising from variations in both the diameter and orientation of jet-grouted columns on the water-tightness of a jet-grouted cut-off wall. A three-dimensional discretised algorithm is used to detect and measure...

... site (layer 2A: upper marine clay; layer 2B: lower marine clay) 07 06 2017 10 05 2018 Published with permission by the ICE under the CC-BY 4.0 license. (http://creativecommons.org/licenses/by/4.0/) 2018 centrifuge modelling ground improvement grouting soil stabilisation...

...S. L. Shen; Z. F. Wang; W. C. Cheng The installation of jet-grouted columns in soft ground can induce lateral displacement resulting from injection of a great amount of water and grout into the ground, which may then lead on to further significant effects. This paper presents an approach...

... mixing has been implemented on soft marine clay. 21 08 2014 06 11 2015 © 2016 Thomas Telford Ltd 2016 centrifuge modelling ground improvement grouting laboratory tests statistical analysis In contrast, intra-column variation is more attributable to the quality...

... to this problem is the lack of knowledge concerning the permeability of the grout between the lining and the soil. This paper presents the results of tests to characterise the properties of grout samples from London Underground tunnels, investigating permeability, porosity, microstructure and composition...

... of a voluminous biological slime. Such slimes can lead to the biofouling of water supply and dewatering wells. In a more complex redox process, organic carbon naturally present in a soil or introduced as part of a chemical grout can be disproportionated, by which process one part of the organic molecule...

..., Construction & Environmental Engineering, Iowa State University, USA. ‡ Department of Microbiology and Biotechnology, Ukrainian National University of Food Technologies, Kiev, Ukraine. 28 2 2012 22 10 2012 © 2013 Thomas Telford Ltd 2013 ground improvement grouting permeability...

... properties to generate the required cavity volumetric expansion rate in clay is presented. The simulation and experimental results of a series of laboratory-scale compaction grouting experiments are presented as an example to demonstrate the validity of the approach. © 2012 Thomas Telford Ltd 2012...

...A. BEZUIJEN; M.P.M. SANDERS; D. DEN HAMER The pressure filtration of grout, pressurised against fine sand, has been investigated in a laboratory set-up. The grout mixtures that were tested consisted of water and bentonite, together with cement, fly ash, silica flour and/or retarder. Samples were...

... of factors may influence the interface shear strength, such as the normal stress, soil properties, soil nail surface roughness, degree of saturation and grouting pressure. Some initial results from field pullout tests on soil nails grouted under pressure have indicated that the grouting pressure contributes...

..., such as face pressure, soil conditioning and effective screw conveyor operation. A recent case history in Bologna is described, in which the innovative use of directional drilling to install curved grout tubes was employed for a compensation grouting project in granular soils. Time-dependent ground movements...

...S. K. A. Au; A. T. Yeung; K. Soga; Y. M. Cheng Subsurface cavity expansion in clay induced by compaction grouting can generate upward displacement of clay and/or increase in effective stress leading to consolidation, resulting in settlement compensation and/or shear strength enhancement...

...E. J. G. Gustin; U. F. A. Karim; H. J. H. Brouwers Plastic viscosity, permeability, injection pressure and efficiency are related by means of two separate laboratory test series. The first is a series of viscosity tests on grouts prepared at different solid–water ratios in order to relate...

...G. Modoni; P. Croce; L. Mongiovì Theoretical modelling of the mechanical phenomena induced by jet grouting is presented. The analysis is developed for the single-fluid method. The jet propagation across the space included between the injection nozzles and the intact soil is first modelled...

...K. Soga; S. K. A. Au; M. R. Jafari; M. D. Bolton Compensation grouting is a multiple injection process in which large numbers of grout injections are carried out in a designated grouting zone. Each injection alters the in-situ stress state at the site of neighbouring injections, influencing...

.... Ces relations sont comparées à celles enregistrées à l'intérieur du massif de granite et à la surface de la roche. En se basant sur les résultats, on examine les effets des différents milieux sur la propagation de l'onde. field instrumentation grouting in-situ testing rock, soil, vibrations...

...F. Bouchelaghem An assessment is presented of the validity of a theoretical model for miscible grout injection in a deformable porous medium. The mathematical formulation couples analysis of the fluid flow and the grout mass transport with a study of the solid skeleton's displacements...