GROUND ENGINEERING Ground engineering particularly in urban sites has become increasingly important since groundwater related subsidence is often not permitted Geological inhomogeneities errors in design or unknown residual founda tions can lead to defects during the installation of excavation pit enclosures of all types The SPESAN WV SPESAN B injection resins can seal defects very success fully even at high water pressures and with large quantities of water without the water mixing with the resin In the process the injection resins reinforce the weak points and provide a durable seal 3 Leaking connection between the sheet pile wall and slurry wall Leaking shotcrete shell during the drilling of a shaft Plating and sealing a high pressure soil cementation Leaking anchor head

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