Jet Grouting

  •  Jet grouting guideline: ASCE

    Abstract: The material presented in this publication has been prepared in accordance with generally recognized engineering principles and practices, and is for general information only. This information should not be used without first securing competent advice with respect to its suitability for any general or specific application. The contents of this publication were developed under the auspices of the Grouting Committee of the Geo-Institute of the American Society of Civil Engineers (ASCE) which represented input from all sectors of the industry, including owners, engineers and specialty contractors. However, the contents were not developed using the American National Standards Institute (ANSI) consensus process through the ASCE Codes and Standards rules, and therefore should not be construed to be a Standard of ASCE. No reference made in this publication to any specific method, product, process, or service constitutes or implies an endorsement, recommendation, or warranty thereof by ASCE. ASCE makes no representation or warranty of any kind, whether express or implied, concerning the accuracy, completeness, suitability, or utility of any information, apparatus, product, or process discussed in this publication, and assumes no liability therefor. Anyone utilizing this information assumes all liability arising from such use, including but not limited to infringement of any patent or patents.

  •  Innovative ground treatment solution for rail bridge renewal

    Abstract: The first application of jet grouting for an Australian transportation authority was recently carried out in New South Wales. This paper describes the design and installation of a jet grouted deep foundation system to support a rail bridge on the Main North line, just north of Lisarow, NSW as part of a bridge renewal. The adopted method of jet grouting is a replacement/mixing technology that uses a high pressure jet to erode and hydraulically excavate soils, to form a grouted soil mass. The project was completed on schedule during limited track possession time, under low headroom conditions. The specification requirements, design, installation, monitoring and post-construction performance of the successful footing system are outlined in this paper.

  •  Case history of jet grouting in British Columbia. Underpinning of CN rail tunnel in North Vancouver

    Abstract: A new re-development on North Vancouver’s waterfront east of Lonsdale is under construction. The development includes the construction of up to 1,100 residential units in low rise to high rise buildings as well as a hotel and other commercial space. The subject site, a historic ship building facility is being developed by Pinnacle International of Vancouver, B.C. One of the lots, Parcel5, is located on the Southeast corner of the intersection of Lonsdale and Esplanade. This lot presented challenging shoring problems due to the proximity of Parcel 5 to an existing rail tunnel, which has a history of previous movements and repair.

  •  Underpinning solutions of historical constructions

    Abstract: The aim of this paper is to present the main design and construction criteria considered on some underpinning solutions performed by Tecnasol FGE. After a brief description of micropiling and jet grouting underpinning techniques, some practical case histories where these techniques were adopted are presented. Finally the main advantages and limitations of the presented techniques are pointed out.

  •  Experiences of ground improvement for urban tunnels in difficult conditions

    Abstract: A brief overview of jet grouting in Brazil is followed by “why and when” basics in relation to ground improvement for safe tunnel excavating. A number of case histories are reported - mostly NATM tunnels involving what were seen as difficult, new, or unusual situations. Our report is based on our own ground improvement experience - over a million meters for 56 tunnels and 26 years of specialized geotechnical work in Brazil, Portugal, Madeira, and Venezuela.