Download Jet Grouting: Technology, Design and Control by Paolo Croce PDF
By Paolo Croce
Unlike comparable titles offering normal info on floor development, Jet Grouting: expertise, layout and Control is completely dedicated to the position of jet grouting – its equipment and gear, in addition to its functions. It discusses the potential results of jet grouting on diversified soils and examines universal drawbacks, mess ups and drawbacks, fresh advances, severe reports, and the variety of purposes, illustrated with suitable case studies.
The booklet addresses numerous issues concerning this well known around the globe perform together with expertise matters, the translation of the mechanisms occurring through the grouting, the quantitative prediction in their results, the layout of jet-grouted buildings, and methods for controlling jet grouting results.
- Discusses the layout standards for jet grouting initiatives and reports present layout principles and codes of perform of other countries
- Provides useful tools for layout calculations of crucial jet-grouted constructions reminiscent of foundations, earth keeping partitions, water cut-offs, backside plugs, and provisional tunnel supports
- Includes the present general keep an eye on tools and so much cutting edge suggestions mentioned for the implementation of qc and caliber coverage procedures
Jet Grouting: expertise, layout and Controlanalyzes the common jet-grouted constructions, similar to foundations, earth preserving partitions, water cut-offs, backside plugs and tunnel helps, and serves as a pragmatic guide for the proper use of jet grouting technology.
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Extra resources for Jet Grouting: Technology, Design and Control
The previous option is feasible only for relatively shallow and short jet grouting because pushing the reinforcement into the freshly made column becomes extremely difficult at depth. On the contrary, drilling and grouting can be carried out at any depth but makes the overall production process more complex. In all cases, particular care is needed to place the reinforcements in the desired position. In some particular cases, it may be useful to use fibreglass elements made of a polymeric matrix reinforced by glass fibres.
In general, there are no particular restrictions on the type of cement to be used, although its characteristics have to be chosen considering the site conditions (see Chapter 8), and in some particular cases, it may be useful to choose special cement types. For example, if rapid setting times are required, it may be convenient to use fine Portland cement, whereas, in a chemically aggressive environment, the use of pozzolanic or blast-furnace cement may be required. Technology 21 The addition of additives may also be useful for some applications.
3 JET–SOIL INTERACTION Nowadays, several results of laboratory investigations are available on the effects of high-energy jets in different soils. In these studies, a basic distinction is made between gravelly, sandy and clayey soils, considering that different mechanisms occur depending on soil particles dimensions. 46 Jet grouting: Technology, design and control Bergschneider (2002) and Bergschneider and Walz (2003), for instance, developed a laboratory setup to visually inspect the erosion mechanism caused by high-pressure jets of water.