JPS5822637B2 - tunnel segment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to a tunnel segment or casing granite, in particular two metal plates arranged along the axial radial plane of the tunnel segment and an arch-shaped concrete mass anchored to these metal plates. The present invention relates to a tunnel segment for lining tunnels and similar underground passages of the type constructed by the present invention.

It is an object of the invention to provide a tunnel segment of this type which can be easily adapted to the required circumferential dimensions in each particular situation, regardless of variations in the circumferential dimensions of the reservoir due to the greater manufacturing tolerances experienced, for example, in foundries. Our goal is to provide the following.

According to the present invention, in a tunnel segment constituted by two metal plates disposed along the axial radial surface of the tunnel segment and an arch-shaped concrete mass anchored to these metal plates, each of the metal plates is A tunnel segment characterized in that it has a plurality of socket-shaped housings in each direction, and both ends of a plurality of arch-shaped circumferential rods embedded in the concrete mass are fixed with a filler inside each of these housings. is provided.

According to another feature of the invention, the peripheral bar is dimensioned to transfer compressive forces applied to the tunnel segment to said plate.

By doing so, the thickness of the concrete and therefore the stiffness of the inning can be reduced and the segments can therefore be brought into optimal compression despite having a minimum volume, e.g. for polling tunnels. The amount of material that has to be removed can be reduced.

A tunnel segment according to the invention is constructed by first placing the two plates with the perimeter bar in place on a jig, then fixing the plates and bars together by the filler, and finally placing the concrete mass in place. Manufactured by pouring into concrete.

According to this manufacturing method, the tunnel segment can be simply cast in a foundry or made by hand, if necessary, to create a tunnel segment of large dimensions using a limited number of different metal parts (the two plates and the circumferential rods). It can be made to exact dimensions based on the metal structure constructed by.

This method still reduces the number of bolts used, reduces the amount of gap sealing material used even when no bolts are used, and further reduces the need for large-sized tunnel segments to include multiple segments. Even when constructed by juxtaposing and fixing, the desired dimensions can be achieved.

Further features and advantages of the invention will become apparent from the following detailed description with reference to the accompanying drawings.

The tunnel segment shown in FIG. 1 has an axis X-X and two metal plates 1, 2 made of, for example, ductile cast iron and parallel to the axis X-XK of the underground tunnel.
It has an arch-like shape with

The plates 1 and 2 are bent ductile cast iron rods 3a. 35... are mutually connected.

The cast iron rod has a circular or other suitable cross-sectional shape and constitutes the arched portion of the cylindrical assembly having the same axis as the tunnel.

The plate 1.2 preferably has a generally curved rectangular profile with two sides parallel to the axis X-X and two sides facing diametrically of the tunnel, the plate 1 having a convex surface. outer side 4
The plate 2 has a concave outer surface 5.

Each plate 1, 2 has a housing on its inner side, which housing is constituted by a side wall 6 of a suitable shape, for example cylindrical, frusto-conical or other shape, resembling a cup and having a corresponding shape. It is integrally cast into a metal plate.

The rod 3.3 has an end 1 of reduced cross-section than the rest of the rod, which is inserted into the housing 6 but limits the remaining gap 8 at the rear.

The gap 8 is filled with a filling and fixing material, for example an epoxy resin or similar material.

The diameter of the rods is a percentage of the thickness of the segment and the spacing between the rods is maintained by a spacer device 9.

The spacing device is constituted by a pair of steel members, for example of corrugated cross-section, one steel member extending above the rod and the other steel member extending below the rod, and the drawing members being interconnected by bolts 10. has been done.

The plate 1 preferably has a central stud 11 as shown in FIG.
and the plate 2 preferably has joint recesses and passages for injecting material for adhering the segments to each other, i.e. for sealing between them, or for injecting filler material on the outside of the casing. Be equipped.

Also, as shown in FIG. 3, cavities 12a are further provided in the concrete annulus 12 to allow the segments to be bolted together.

Furthermore, as shown in FIG.
, 2 are provided on the inner surfaces of the plates 1 and 2 to assist in latching concrete onto the inner surfaces of the plates 1 and 2.

Such tunnel segments are assembled and put into place by the method described below.

Metal plates 1, 2 cast in a foundry are placed on a jig G whose dimensions correspond to those of the finished part.

After this, the filling material is injected into the housing 6 and the rods 3.3... are placed in the position allowed by their spacer devices 9.

The dimensional adaptation takes place by adjusting the gap 8 remaining between the end l of the rod and the housing 6.

The filling or connecting material injected into the gap 8 allows the transmission of high compressive forces.

The metal structure thus assembled is then transported to a location where it is to be covered with a filling material 12, for example of concrete, mortar or the like.

The flow of filler material e.g. concrete is applied to the plate 1 in the circumferential direction.
It is limited by ゜2.

To facilitate handling of the metal structure before pouring concrete, some of the bolts 10 are placed in a lifting ring 1.
It is preferable to replace it with 0a (only one is shown in the drawing), and by doing so, the stress in the metal structure is completely reduced to its minimum value during lifting, so the metal structure There is no danger of deformation.

In the embodiment shown in FIG. 4, the edge of the concrete ring is
Protected by an inner longitudinal flange 14a and a radial flange 145 formed in the metal plate, bonding reinforcement is used to prevent cracking of the concrete in the basin due to the high contact forces caused by the pressing of the lining as a result. That is no longer necessary.

In fact, the connection is achieved firstly by the presence of a housing 6 on the plate in which the rod is positioned, and secondly by the presence of a flange 14 on the plate which limits and significantly strengthens the concrete in compression.
It is created by the presence of a, 145.

If desired, the flanges 14 may have bolt holes 15 for interconnecting the segments in the longitudinal direction.6 In a general manner, the connection of the metal plates 1, 2 and the flanges 14a, 14 is made during handling. provides good segment protection and facilitates coffering for concrete pouring.

The tunnel segment of the invention made of cast iron and concrete as described above can withstand loads of 500 t/m to 1000 t/m.

[Brief explanation of drawings]

1 is a perspective view of a tunnel segment according to the invention, FIGS. 2 and 3 are enlarged sectional views showing details of two parts of the segment according to the invention, and FIG. 4 shows a variant of the segment according to the invention. FIG. 1.2...metal plate, 3.3...four circumference bars, 4...
Outer convex surface, 5... Outer concave surface, 6... Uzing still side wall, 7... End, 8... Gap, 9... Spacer device, 10... Bolt, 10a ... Lifting ring, 11 ... Central stud, 12 ... Concrete mass, 128 ... Vacant space, 13 ... Anchoring protrusion.

Claims (1)

[Claims] 1. In a tunnel segment composed of two metal plates arranged along the axial radial surface of the tunnel segment and an arch-shaped concrete mass anchored to these metal plates, each of the metal plates has a plurality of metal plates on its inner surface. 1. A tunnel segment characterized in that the housing has a plurality of arch-shaped circumferential rods, each of which is embedded in the concrete mass, and both ends of which are fixed with a filler.