KR20120050605A

KR20120050605A - Structure of reinforcing net of tunnel

Info

Publication number: KR20120050605A
Application number: KR1020100111939A
Authority: KR
Inventors: 박재현
Original assignee: 디앤씨건설 주식회사
Priority date: 2010-11-11
Filing date: 2010-11-11
Publication date: 2012-05-21

Abstract

[Problem] The problem is to reinforce the inner wall of the tunnel by digging as it is and to prevent the collapse of the rock.

[Solution] In a tunnel by digging as it is, digging as it is, a plurality of side ropes 5 and a longitudinal rope 6 intersect the position of the houndstooth on the inner wall 4 of the tunnel. Or a cross clip which is fixed by an anchor member 8 buried in a rock in the vicinity thereof and whose intersection is a U bolt 19 and a seat plate 21 other than the anchor member 8 fixed by the anchor member 8. ) Is finished by 9, each of the ropes (reinforcement) net (net) material 7 is terminated by a spiral clip (10) and each of the ropes (5), (6) and reinforcing nets (net) The material 7 is in close contact with the rock of the side wall 4 in the tunnel.

Description

Structure of Reinforcing Net of tunnel}

This article relates to a tunnel reinforcement network structure which prevents the collapse of the inner wall of the tunnel by digging out as it is.

In the tunnel excavated with Chiyama 1 as shown in Fig. 6, only the ceiling 2 is reinforced by concrete 3, and the inner walls 4 and 4 are dug as they are. Tunnels still exist and are provided for transportation.

The tunnel of the digging as it is, since the inner walls 4 and 4 are the ones that excavated Chiyama 1, collapse is likely to occur on its own, and the danger is enormous.

However, reinforcing the inner walls 4,4 of the tunnels with concrete retaining walls, and the cost of construction is huge, as well as the long period of blocking traffic and many obstacles, and then the concrete ( concrete The width of the tunnel is narrowed only by the thickness of the retaining wall, and it is difficult to adopt in the case of road or railroad.

In consideration of the above points, this proposal can prevent the collapse of the inner wall exposed by the rock in the tunnel as it is dug up without reducing the width in the tunnel, and at the same time, reinforce the construction work in a short construction period. The task is to provide a tunnel reinforcement network structure that can be used.

As a means to solve the above problems, the present invention, in the tunnel by digging as it is, digging as it is a plurality of side ropes and longitudinal ropes on the inner wall of the tunnel (tunnel) Cross clip, which is fixed by an anchor member embedded in the rock at or near the houndstooth position, and whose intersection is a U bolt and a seat plate other than that fixed by the anchor member. Is terminated by a spiral clip, and each of the ropes and reinforcing net material is a rock of the side wall in the tunnel. It is characterized in that it is in close contact with the device. It is preferable to use a resin anchor as the anchor member.

By the above structure and the following, the reinforcing network is dug out as it is, and it becomes a structure close to the rock which exposes to the inner wall of the tunnel. Thus, collapse of Chiyama without substantially narrowing the width of the tunnel. It is possible to prevent traffic accidents and to improve the safety of traffic.In addition, it does not require a long time for construction, so the time to cut off the traffic is short, and the construction cost is significantly cheaper than the reinforcement by concrete. Can be.

Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

Figure 1 shows a front view of a part of an embodiment of a tunnel reinforcement network structure according to the present invention, this example shows a case where the height is 2m, and Figure 2 (A) shows the AA arrow of Figure 1, Fig. 2 (B) shows the BBB arrow in cross section.

The tunnel reinforcement network structure is three longitudinal ropes 5, 5, and 5 (wire rope), which are laid out at an interval of 1 m, and are vertically spaced at an interval of 1 m. Longitudinal ropes 6,6... (Wire rope) and reinforcing net material 7 which is attached to these ropes 5 and 6, the side ropes 5, 5 and 5 and longitudinal ropes 6,6... The intersection point of the houndstooth position is end with anchor member 8, the other end with cross clip 9, and the reinforcing net material 7 is a spiral clip on the rope. Delayed to 10.

The side ropes 5, 5 and 5 are connected and tensioned using a toucan turn buckle 11.

In the illustrated embodiment, the anchor member 8 is a resin anchor. A resin anchor is formed of the base of the threaded portion 12 formed at one end thereof to show an example in FIG. Multiple projections 14,14. A resin anchor main body 15 having a length of about 1 m protruding in the circumferential direction, a rectangular rope fixing plate 16 fitted to the screwless base 13, and a plate 16. It consists of a nut 17 which is screwed onto the threaded part 12 to fix it.

This resin anchor inserts a conventional resin-containing resin into a hole cut by a rock drill in a rock exposed to the inner walls 4 and 4 of the tunnel shown in Fig. 6, Subsequently, the two liquids are mixed while rotating the resin anchor body 15 while inserting it to a depth where the screw base 13 is slightly exposed, and by the reaction, the volume expands and the resin anchor body 15 is It will fall out of the rock and stick to the impossible.

At the end of the tunnel reinforcement network structure, a resin anchor main body 15 is buried in a vertical direction corresponding to three side ropes 5, 5, and 5 at the top and bottom, and spaced at an interval of 1 m in the vertical direction. A loop of the ends of the side ropes 5, 5 and the longitudinal rope 6 is inserted into the screwless base 13 of the resin anchor body 15 With respect to 15, the loop at the end of side rope 5 is fitted, while the longitudinal rope 6 is in line with the threadless base 13, and the range anchor body 15, 15, 15 degrees. The rope fixing plate 16 is fitted from the threaded portion 12, the square rope is pressed down, and fixed by the nut 17 screwed into the threaded portion 12.

The intersection of the houndstooth position with the side rope 5 and the longitudinal rope 6 is fixed with anchor member 8 (resin anchor), so that Figure 3 is omitted.

Cross clip 9, ending at the intersection of the side rope 5 and the longitudinal rope 6, which is not secured by the anchor member 8, is U-shaped to show an example in FIG. U-bolt 19 having a bent portion 18, 18 at each end and a pair of holes 20, 20 through which a pair of holes 20, 20 through which the U-bolt 19 can be inserted, are provided. It consists of nuts 22 and 22 which are screwed into the threaded parts 18 and 18 of the U bolt 19.

Therefore, at the intersection of ropes 5 and 6, as shown in 5 (A), one rope (for example, 5) passes through the U bolt 19, and this rope 5 A rope (eg 6) on the other side is sandwiched between the rope 5 and the seat plate 21 and both ropes 5, 6 as the nuts 22 and 22 are fixed. Is fastened securely.

The reinforcing net material 7, the side ropes 5, 5, 5 and the longitudinal ropes 6, 6... The spiral clips 10 are wound around the coils to install the elements.

By the above arrangement, the side ropes 5, 5, 5 and the longitudinal ropes 6, 6... The silver mimics the irregularities of the rock exposed to the inner surfaces 4 and 4 of the tunnel, and is closely contacted and stretched, and these reinforcing nets 7 are provided on these ropes. The material 7 is also in close contact with the rock surface, preventing the collapse of soil and gravel on the inner surfaces 4 and 4 under the cooperation with the ropes 5 and 6, and reliably preventing it from falling on the road surface in the tunnel. can do.

In addition, when the height of the inner side wall 4 in a tunnel is high, the side rope 5 may be extended accordingly.

Fig. 1 is a front view of a part showing an embodiment of a tunnel reinforcement network structure according to the present proposal.

[Figure 2] (A) is the sectional view of the arrow A-A in Figure 1, (B) is the angular cross-section of the arrow B-B.

Fig. 3 is an abbreviated explanatory drawing showing the attachment position by the anchor member.

Fig. 4 is a front view showing a resin anchor as an example of an anchor member.

Fig. 5 shows an example of a cross clip, (A) is a front view, and (B) is a plan view of the seat plate.

Figure 6. A cross section showing a tunnel as it is dug out.

[Description of Symbols]

4 Digging out as is the inner side of the tunnel

5 side rope

6 vertical rope

7 Net material for reinforcement

8 Anchor member (resin anchor)

9 cross clip

10 helix clips

11 turn buckle

15 resin anchor body

16 rope holding plate

19 U bolt

21 seat

Claims

In a tunnel by digging as it is, digging as it is A plurality of side ropes and longitudinal ropes are buried in the rock at the intersection of the houndstooth positions at the inner wall of the tunnel An intersection point other than that fixed by the anchor member, which is fixed by the anchor member, is terminated by a cross clip that is a U bolt and a seat plate. A reinforcing net material is finished in a rope by a spiral clip, and the rope and the reinforcing net material are in close contact with the rock of the side wall in the tunnel. (tunnel) Reinforcement network structure.

The tunnel reinforcement net structure according to claim 1, wherein the anchor member is a resin anchor.