Construction method for putting tunnel shield into hole in special stratum

• Main Authors: WANG KAIHUA, CAI GUOLIANG, SHEN DEFA, JIN FUQIANG
• Format: Patent
• Language: Chinese; English
• Published: 03.03.2010
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention relates to a construction method for putting a tunnel shield into a hole in a special stratum, which is characterized by comprising the following steps: before putting the tunnel shield into the hole, approaching the tunnel shield to a tunnel portal gradually; injecting a bi-liquid grout into a soil layer of an external layer; chiseling off thick underground continuous wall concretein a steel ring of the tunnel portal; performing ground vertical sectional probe hole detection; welding a prepared double-layer spring steel plate on the steel ring of the tunnel portal; arranging ahole-entering device on the outer side of the steel ring of the tunnel portal; cutting internal arranged steel bars of an underground continuous concrete wall; pushing the tunnel shield into the holewithout a concrete protective layer; and injecting the bi-liquid grout again at a seam between reinforced soil and unreinforced soil bodies, wherein when the tunnel shield is put into the hole, the double-layer spring steel pla