JPH0280192U - - Google Patents

Description

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional schematic diagram of the screw-type shield excavator, Figure 2 is a cross-sectional view of the tunnel built inside the rear of the screw-type shield excavator, and Figure 3
The figure shows the back of the cutter of a screw-type shield excavator and the propulsion blade attached to the cutter, Fig. 4 is a schematic longitudinal cross-section of a conventional shield excavator, and Fig. 5 shows the rear interior of a conventional shield excavator. A cross-sectional view of the tunnel is shown. 1 is the cutter, 2 is the skin plate, 3 is the cut earth and sand cut by the cutter, 4 is the earth and sand discharge device, 5
is the propulsion machine, 6 is the stabilizer, 7 is the injection port attached to the shield excavator, 8 is the circular cross section cut by the cutter, 9 is the tunnel construction, 10 is the cutter chamber, 11 is the cutter chamber and the upper part of the skin plate a second sediment discharge device directly connected to the
13 is a circular cross section cut by a conventional cutter, 14 is a conventional skin plate, 15 is a conventional tunnel construction, 16 is a gap around a conventional tunnel construction, 17 is a conventional tunnel construction 18 shows inverted concrete in a conventional tunnel construction.

Claims (1)

[Scope of claim for utility model registration] (1) The shield excavator in the shield construction method is
It consists of a cutter 1 and various devices built into the skin plate 2, but in this shield excavator, the earth and sand 3 cut by the cutter is simply discharged by the earth and sand discharge device 4 in the same way as in conventional shield excavators. Instead, the mechanism should be such that it is actively pushed around the skin plate and actively filled around the tunnel construction 9. (2) For the purpose of pushing the cut earth and sand 3 around the skin plate 2, a propulsion blade 5 is attached to the outer periphery of the cutter in order to make the cutter have the same effect as a screw, and the main body of the shield excavator including the skin plate. In order to resist the rotational reaction force generated by the rotation of the cutter, a stabilizer 6 having a plate shape or having a curvature is installed around the skin plate. (3) In order to easily move the cut earth and sand 3 backward, there is a suitable difference between the circular cross section 8 cut by the cutter and the cross section of the skin plate to allow movement of the earth and sand, and the cross-sectional shape of the skin plate is (4) For the purpose of pushing the cut earth and sand 3 into the upper part of the tunnel construction, a second earth and sand discharge device 11 is installed between the cutter chamber 10 and the upper part of the skin plate, and is operated in parallel with the excavation. thing. (5) In order to assist the mechanisms in items (1) to (4) above, a fluidizing agent such as a foaming agent is applied to the shield excavator in order to easily move the cut soil 3 to the skin plate and around the tunnel construction. If it is necessary to mix the cut earth and sand from the installed injection port 7, and to strengthen the area around the tunnel construction in steep curve construction, etc., a chemical solution or muddy water solidifying agent can be added to the tunnel construction for the purpose of solidifying the surrounding earth and sand or muddy water. Inject from the installed injection port 12.