METHOD FOR PURIFYING EXCAVATED SOIL WHEN SHIELD CONSTRUCTION IS PERFORMED IN CONTAMINATED SOIL AND SHIELD EXCAVATOR

PROBLEM TO BE SOLVED: To provide a technique which realizes more efficient purification processing and which can maintain favorable tunneling environment by effectively utilizing a shield machine itself in excavated soil purification processing when shield construction is performed in a contaminated...

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Bibliographische Detailangaben
Hauptverfasser:	TAMURA KAZUHIRO, MIYAZAWA MASAHIRO, SAKAI MASAHIDE, SHIBAMOTO MASANAO, OKA KOJI, HOGA YASUSHI
Format:	Patent
Sprache:	eng
Schlagworte:	DISPOSAL OF SOLID WASTE EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL RECLAMATION OF CONTAMINATED SOIL RECLAMATION OF CONTAMINED SOIL SOIL SHAFTS TRANSPORTING TUNNELS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a technique which realizes more efficient purification processing and which can maintain favorable tunneling environment by effectively utilizing a shield machine itself in excavated soil purification processing when shield construction is performed in a contaminated soil.SOLUTION: A method for purifying the excavated soil when performing shield construction in the contaminated soil, includes a step of adding a purifier for the contaminated soil to a ground by a shield face, a step of stirring and mixing the excavated soil D1 taken inside a chamber 13 of the shield machine by a stirring means 14, and a step of transferring the stirred excavated soil inside the chamber to the outside of the chamber. If the contaminated soil contains a volatile organic compound, an ultrafine iron powder solution and a fine powder activated carbon solution are used as the purifier.