JPH02252897A - Shield segment - Google Patents

Abstract

PURPOSE:To facilitate piling up by providing a projection in the direction of crossing an arc curve on one portion on the inner face of an arc-form segment and assembling a segment on one face of the projection and forming a ring. CONSTITUTION:Bolt holes 4 are provided on both side faces 3 of an arc face 2 while also providing bolt holes 6 for forming a ring on both end faces 5 of the arc face 2. A projecting portion 7 is provided in the direction of crossing the arc of a segment 1 while forming a vertical wall 8 on one side of the projecting portion 7. Then, a flat board like wall type segment 10 for a pillar or a wall is fitted in between segments 1 and placed on a horizontal floor 9 and fixed with bolts. Thereby, a wall for partitioning the inside of a tunnel or a pillar, or a floor or a ceiling can be simply installed..

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to segments used in shields for constructing oval tunnels.

<Conventional technology> When using a shield tunnel as a road tunnel,
Since the building limits of vehicles running inside are long horizontally, it is more effective to adopt a flat cross section than a circular cross section.

With such a flat cross section, if a support is provided inside to receive the load from above, the lining can be made thinner, which is economical.

Furthermore, the flat cross-section has the advantage that the struts can be used not only for reinforcement (but also as boundary equipment between running parts and air ducts, etc.).

For this purpose, segments having protruding arms in a Y-shape or T-shape as shown in FIGS. 6 and 7 have been developed and used, but they have the following drawbacks.

<A> Since the shape is complex, it takes time and effort to manufacture, making it expensive.

The shape of the mouth is deformed, making it difficult to stack.
Therefore, a large space is required for storage.

〈C〉Transportation is also uneconomical for the same reason that stacking is difficult.

OBJECTS OF THE INVENTION The present invention was made to solve the above problems, and aims to provide the following segments.

<A> A segment that has a simple shape, is easy to manufacture, and is inexpensive.

<Opening> Segment having a simple shape, easy to stack, and easy to store and transport <Structure of the present invention> Next, an embodiment of the segment of the present invention will be described.

<A> Overall shape (Fig. 1.2) The segment 1 of the present invention is basically a normal arc-shaped segment.

A large number of bolt holes 4 are opened in both side surfaces 3 of the arcuate surface 2 for connection to adjacent rings.

Further, a large number of bolt holes 6 for forming rings are opened on both end faces 5 of the circular arc surface 20.

<Mouth>Protrusion A protrusion 7 is formed in a direction transverse to the arc of this segment 10.

The protrusion 7 is formed from one end of the segment 1 to the other end.

This protrusion 7 has a shape that is larger than the shape of the arcuate surface 2 of the segment 1.
It has a shape that protrudes inside the curved surface.

Therefore, no part of the segment 1 is cut into the interior and the cross section is reduced, and the basic thickness is maintained in all cross sections.

<C> Vertical wall A vertical wall 8 is always formed on one surface of this projection 7.

Therefore, this vertical wall 8 is also formed in a direction that crosses the arcuate surface 2, from one end to the other end.

"Vertical" here means that the segment 1 is positioned vertically after all the segments 1 are assembled to form an ellipse.

<2> Horizontal floor (example shown in Fig. 1) The protrusion 7 is formed by rising inward from the arcuate surface 2, but when the upper surface of the raised part is formed horizontally to form the horizontal floor 9. There is also.

"Horizontal" here means that the segment 1 is positioned horizontally after all the segments 1 are assembled to form an ellipse.

<How to use> Next, a method for assembling the segment 1 described above will be described.

(A) Assembly of the whole The segment 1 of the present invention is incorporated in a part to form an elliptical segment ring as a whole.

In this case, the segments 1 of the present invention are positioned at corresponding positions above and below.

Then, a flat wall segment 10 for a column or wall is fitted between the segments 1 of the present invention arranged above and below.

In this case, the fitting is performed by the method described below.

<Exposure> When using a horizontal floor (Fig. 1.3), a wall segment 10 is used whose upper and lower surfaces are perpendicular to the side surfaces.

Then, the lower surface of the wall segment 1o is placed on the horizontal floor 9 of the segment 1 of the present invention placed on the floor and fixed with bolts.

Similarly, the upper surface of the wall segment 10 is brought into contact with the horizontal floor 9 of the segment 1 of the present invention placed on the ceiling and fixed with bolts.

<C> When using a vertical wall (Figure 2.4) Bring the lower side of the wall segment 10 into contact with the vertical wall 8 of the segment 1 of the present invention placed on the floor, and fix both with bolts. .

In this case, the upper and lower surfaces of the wall segment 10 are formed to match the shape of the inner curved surface of the segment.

Similarly, the upper side surface of the wall segment 10 is brought into contact with the vertical wall 8 of the segment 1 of the present invention arranged on the ceiling, and both are fixed with bolts.

In this case, therefore, the horizontal floor 9 of segment 1 is unnecessary.

<2> Arrangement of the floor plate (Fig. 5) The segments 1 of the present invention with the horizontal floor 9 are arranged only on both sides of the floor portion of the segment ring.

Then, both ends of the floorboard 11 are placed on the horizontal floors 9 on both sides, and the hanger is passed.

As a result, a horizontal floor surface is formed inside the segment ring.

<Effects of the present invention> Since the segment of the present invention has the structure as described above,
The following effects can be achieved.

<A> It has a simple shape with a convex portion protruding from the inside of the segment.

Therefore, it can be manufactured at low cost using simple equipment.

The shape of the mouth is simple, with only a portion protruding.

Therefore, it is easy to stack, store and transport.

<C> Construct a vertical wall surface or a horizontal floor surface on a part of the convex part of the segment (this makes it possible to easily attach walls and columns that partition the inside of the tunnel, or floors and ceilings).

(2) By providing a partition inside the tunnel and using the partition as a structural material, an elliptical shape with a high oblateness ratio can be constructed, and space can be used effectively in road tunnels and the like.

Figure 1

[Brief explanation of drawings]

Figures 1 and 2: A perspective view showing an embodiment of the segment of the present invention. Figures 3 and 4: An illustration of its assembled state. Figure 5: An illustration of another embodiment. Figures 6 and 7: A diagram of the prior art. Explanatory diagram

Claims (3)

[Claims] (1) A shield segment that is an arcuate segment and is characterized by having a protrusion formed on a part of its inner surface in a direction that crosses the arcuate curve. (2) An arcuate segment, in which a protrusion is formed on a part of its inner surface in a direction that crosses the arcuate curve, and on one side of this protrusion, when the segments are assembled to form a ring, it will be positioned vertically. A shield segment characterized in that a vertical wall is formed in a direction that crosses an arcuate curve. (3) An arc-shaped segment, in which a protrusion is formed on a part of its inner surface in a direction that crosses the arc curve, and on one side of this protrusion, when the segments are assembled to form a ring, the position is horizontal. A shield segment characterized in that a horizontal floor is formed in a direction that crosses an arcuate curve.