JPS60141993A - Vertical two-step type shield - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Mokukomei relates to a vertical two-stage shield in which the upper and lower two stages are simultaneously dug in the shield construction method used in ground and iron works.

In recent years, the amount of land that can be used for subway construction, etc. has become extremely narrow due to the increase in underground underground facilities such as water supply, sewage, other electric wires, gas pipes, etc., and securing the width of the land is extremely difficult.
I'm getting sicker.

Therefore, the conventional method of excavating in seven rows horizontally was changed to a method of cutting in seven rows horizontally.

However, after digging one 1~nnel, Tomoko dug another 1~nnel under it. Cut J
With such a construction method, the excavation and installation have already been done.ii1. L/
/ Proceed with excavation so as not to come into contact with the segment.

The present invention was developed in order to solve the following two problems, and by excavating the upper and lower (~ tunnels) at the same time, it is possible to reduce the , U4I'
Seal F' that does not have to be used ■ ↑ Number of seals F' ], 2-stage center-of-gravity seal 1- that can be used by 2 people or 1 person! ! ! The purpose is to make an offering.

However, in the present invention, each of the J-cutting equipment is made up of a 4M structure consisting of a partial shield and an upper shield, and the upper shield and the lower shield are configured as an upper and lower unit. This relates to a vertical two-stage shield configured to prevent interference.

Next, embodiments of the present invention will be described based on the drawings. (
(Fig. 1) The vertical two-stage shield of the present invention has a shape in which two hollow cylindrical bodies, an upper shield 1 and a lower shield 2, are stacked parallel to each other in the axial direction.

The tip of the upper shield 1 is further fj than the tip of the lower shield 2.

Furthermore, its cross-sectional shape is a figure-eight shape in which two circles touch at one point, rather than a figure-eight shape in which two circles overlap a part of each circle.

Therefore, the contact area between the two shields becomes horizontal, and a shelf-like workbench 3 is installed horizontally there.

Each of the shields 1.2 has a drilling device 11.2 inside.
21 (also installed at the rear end of the shield near the shield sole 6fNJ), and on the workbench 3, install an interrupted screw 17 for taking the anti-horn on the horizontal partition segment 5' (described later). do.

Both excavating devices 11 and 21 have a disk-shaped upper cutter 12 and a lower cutter 22 at their tips, respectively, so as to rotate around the axis of a stepped cylindrical shield to excavate.

Note that the upper cutters 12.22 are not installed on the same vertical plane, so that the rotating cutters 12.22 do not collide with each other.

Next, a method of using the shield of the present invention will be explained.

Excavation Both the upper and lower excavators 11.21 are operated and excavation is started by rotating the J two-part cutter 12 and the lower cutter 22.

At this time, excavation starts at the same time, and since the upper excavation cross section 11 is ahead of the lower excavation device 21 in the Hennel axis direction, the ground to be excavated is first excavated in the upper tunnel A.
is dug, then the lower part 1 to tunnel B will be dug.

Further, the lower cutter 22 of the lower shield is connected to the upper shield 1.
The cross-sectional shape of the tunnel that was excavated in order to pass through a part of the upper tunnel A and excavate the lower part h>NE JttB is as shown in Figure 2. The shapes are shaped like a figure 8, which is formed by combining a part of each circle.

In FIG. 2, a3 is a peripheral segment 5, and 5' is a horizontal partition segment 1 to 5.

7j Segment 1 to upper part is assembled by Rocco, etc., and the segment in front of J is carried in, and inside the lower shield 2, the shield tail 6 is assembled, and the upper shield 1 is C゛. is assembled on workbench 30.

To assemble the segments of the second part 1-channel A, use the horizontal partition segment 5- at the boundary between the upper part 1 and the channel, and use the top of the groove as the entry path.

<C> Take the reaction force to the circumferential i7J segment 5 and the horizontal partition segment 5' that are assembled in 1LL of the shield, and apply the upper trail by the seal 1-sol 6 (the shield near q) 1~ Delete the whole ++rIl and at the same time J "Advance floods.

2) Other Embodiments In addition to the present embodiment, the vertical two-stage shield may have the form shown in FIGS. 3 to 7.

As shown in Zunawara Figures 3 and 4, double 7J ivy 12.22
It is conceivable that the auxiliary cutter 7 may be used to excavate the cut-out part excavated by the auxiliary cutter 7.

In addition, as shown in Figures 5 and 6, without overlapping the upper and lower cutters 12 and 22, excavate so that the excavation cross section of the tunnels 1 to 1 forms a figure 8 where circles of the same diameter touch at one point, and It is also conceivable to excavate the portion with an auxiliary cutter.

In the vertical two-stage shield of this embodiment, is the tip of the lower shield further than the tip of the lower shield? However, as shown in Figure 7, it is also conceivable that the upper shield is located at the tip.

In this case, it is thought that the center of the entire shield becomes stable.

What we have seen above is #+i cut surface of f ten hc Ii'+
IU It is a shield that has a cross section of human ripples, but this-
In addition to this, it is also possible to excavate the upper part with a larger excavation cross section and the F part with a smaller excavation cross section, or vice versa.

Since the tree 5 is as explained below, the following effects can be expected.

Rather than constructing the tunnels separately, the seal itself is integrated into the soil type, so
- It is possible to drill the upper and lower channels on the iE 611.

Sites for iron works, etc. (J-
There is a solution C that is h-effective for future site work, as long as the median segment /, it) is kept as ff[η.

[Brief explanation of drawings]

Figure 1: Cross-sectional illustration of the shield of the present invention Figure 2: Cross-sectional diagram of a tunnel using the shield of the present invention Figures 3 and 7: Illustration of other embodiments of A 1: 4-part shield 2: Lower part Shield 3: Workbench /1: Shield jack I: 5: Peripheral segment 5゛: Horizontal partition legmen h6: Shield Dale 7: Auxiliary cutter 11 Nido δ
1(](ii) Cutting equipment 12: Upper cutter 21: Lower excavating equipment 22: Small cutter Applicant: Taisei Corporation Ne1 2z Figure 45

Claims (1)

[Scope of Claims] The lower seals 1 to 1, each having an excavation device, and the lower shield J, and the lower shield J and R2 are formed, and the upper shield and the lower shield are configured as a top and bottom unit, and the excavation device of I don't interfere with near J
: Vertical X-tiered seal 1-6 configured as a sea urchin