This preventive technique is an essential complementary expertise in tunnel construction.<\/strong><\/p>\n<\/div> Soletanche Bachy uses compensation grouting to limit surface settlement during tunnel construction.<\/p>\n<\/div> The excavation of underground tunnels is always accompanied by surface settlements with follow a Gaussian bell curve profile and may result in significant levels of damage.<\/strong><\/p>\n The principle of compensation grouting is to avoid soil decompression as a result of earthworks by delivering precise and calibrated quantities of grout between the tunnel<\/a> and the structures to be protected. The key factors are:<\/p>\n Compensation grouting can be used wherever there is a risk that a tunnel worksite could cause a sensitive structure to deform. It is relevant for all tunnelling techniques: tunnel boring machines (TBM), traditional tunnel, NATM, etc.<\/p>\n It has the following limitations from the geotechnical point of view:<\/p>\n Compensation grouting can perfectly be used with the Observational Method. Commonly, compensation grouting plays a major role within a remediation programme to provide protection to existing structures in case something occurs as the tunnel boring machine is progressing.<\/p>\n<\/div> \n<\/div> What are the advantages of this technique ?<\/p>\n <\/h2><\/div> It is perfectly adapted to tunnel construction<\/strong><\/p>\n \n<\/div> It limits the settlement of neighbouring structures<\/strong><\/p>\n \n<\/div> It is a \u201csurgical\u201d treatment, used only when and where necessary<\/strong><\/p>\n \n<\/div>What is compensation grouting?<\/h2><\/div>
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What are applications for compensation grouting ?<\/h2><\/div>
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In this section :<\/h3><\/div>
<\/i>What is compensation grouting?<\/a><\/a><\/h4><\/div>
<\/i> The advantages of this technique<\/a><\/a><\/h4><\/div>
<\/i> Soletanche Bachy’s advantages<\/a><\/a><\/h4><\/div>
<\/i> Implementation<\/a><\/a><\/h4><\/div>
<\/i> Execution control and monitoring<\/a><\/a><\/h4><\/div>
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