JPH0329439Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an impact force isolating device that protects the surrounding environment from blast waves and flying objects caused by blasting in tunnels, etc.

(Prior Art) In conventional impact force isolating devices of this type, a rectangular explosion-proof sheet is generally suspended from a support using wires to prevent flying stones during blasting.

(Problems to be solved by the invention) In the above-mentioned conventional device, the explosion-proof sheet is simply tied to the shoring with wires, etc., so the sheet and the tied part are damaged by direct hits from flying stones during blasting. easily damaged.

In addition, the explosion-proof sheet is not equipped with a means for mitigating the impact of flying stones, and the sheet material is not strong enough to withstand the impact of flying stones.

(Means for Solving the Problems) The present invention was proposed to solve the above problems, and includes a support for impact protection on the inner peripheral surface of the hole-shaped space through an elastic body. Install the seat,
The present invention relates to an impact force isolating device characterized in that the hole-like space on which impact force acts is partitioned by the same sheet.

(Function) Since the present invention is constructed as described above,
Flying stones and the like caused by the impact force generated in the hole-like space are prevented by the impact protection sheet that partitions the hole-like space, and deformation of the sheet and damage between the sheet and the hole-like space are prevented. The impact on the sheet is alleviated by the deformation of the elastic body interposed between the support body and the inner circumferential surface of the space.

(Embodiment) The illustrated embodiment in which the present invention is applied to a tunnel shock isolation device will be described below.

Reference numeral 1 denotes a support constructed of H-shaped steel installed in the tunnel, and a female threaded portion 3a at one end of a rubber mounting member 3 constituting the elastic body is screwed onto the tip of a tie rod bolt 2 set on the support 1. The explosion-proof sheet 4 constituting the impact protection sheet is brought into contact with the other end surface of the mounting material 3, and the rubber bolt 5 inserted through the sheet 4 is inserted into the female threaded portion 3b of the other end of the mounting material 3.
The explosion-proof sheet 4 is screwed onto the shoring 1, and the inside of the tunnel is partitioned by the sheet 4.

The material of the explosion-proof sheet 4 has a cutting strength of 22, for example.
Aromatic polyamide fibers used in g/d bulletproof jackets, ie high tensile strength fibers commonly called aramid fibers, are used. Additionally, felt 6 is provided on the surface of the sheet 4 to cushion direct hits from flying stones.
is pasted. Furthermore, since high tension is applied to the fastened part, this part is reinforced with a nylon sheet 7, and an air hole 8 is also provided to remove the strong blast wave received from the sheet surface.
Many holes will be drilled.

9 in the figure is a span pipe interposed between adjacent shoring structures 1.

Since the illustrated embodiment is configured as described above, the impact on the explosion-proof sheet 4 caused by blast waves and flying stones during blasting is alleviated by the deformation of the sheet 4 and the deformation of the rubber mounting material 4. At the same time, it protects the surrounding environment from the blast waves and flying stones.

FIG. 6 shows another embodiment of the present invention, in which the embedded bolts 11 of the structure 10 with the lining etc.
A case is shown in which an explosion-proof sheet 4 is attached via a rubber attachment material 3.

FIG. 7 shows another embodiment of the present invention, in which a spring 12 is used instead of the rubber attachment 3, and one end of the spring 12 is connected to a nut 13 screwed onto a tie rod bolt 2 set in the shoring 1. welded to lol
Then, attach the other end hook portion 12a to the eyelet 1 of the explosion-proof sheet 4.
4, so that the sheet 4 can be easily attached to the shoring 1.

FIG. 8 shows an embodiment in which the spring 12 is attached to the embedded bolt 11 of the structure 10 after lining and the like.

When protecting the structure 10 that has been lined, attach the C-bolts 15 or form ties used during construction to the embedded bolts 11, and stretch the messenger wire 16 between the C-bolts 15. The explosion-proof sheet 4 is attached to the wire 16 and the C-bolt 15 via the S-shaped ring 17. (See Figure 9) Furthermore, when installing the explosion-proof sheet 4 in the middle of the shoring structure 1 that has been erected, attach the S-shaped ring 17 to the nylon belt 7 of the sheet 4 and set it on the span pipe 9. do. (See Figure 10) Figures 11 to 13 show the positional relationship between the blasting point and the explosion-proof sheet in tunnel A. If the lower part of tunnel A is to be blown up and the upper part _A1 is to be protected, Figure 11 shows As shown in the upper half and _FIG .
When blowing up the side part B ₂ and protecting the opposite side A ₂ , an explosion-proof sheet 4 is placed along the opposite side A ₂ as shown in the lower half of Figure 11 and Figure 13. It is something that

(Effects of the invention) As described above, in the present invention, an impact protection sheet is attached to the supporting body on the peripheral surface inside a hole-like space such as a tunnel through an elastic body, and the sheet protects the hole-like space. When an impact occurs, the deformation of the sheet and the deformation of the elastic body reduce the impact on the sheet, reducing the strength of the sheet, and simplifying the support structure of the sheet. Therefore, it is possible to simplify the impact isolating device of the present invention.

Moreover, the sheet can prevent disasters caused by flying stones during blasting in the hole-like space, and damage to the machine can be prevented. Also, by blocking flying stones during blasting near the face, it becomes easier to accumulate stone debris.

Furthermore, the sheet prevents disasters caused by flying stones, thereby shortening the evacuation distance of the machine and shortening the construction period.It also prevents noise by suppressing explosion sounds and prevents dust from being generated during blasting. , work can be carried out in a contained state.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional plan view showing one embodiment of the impact force isolating device according to the present invention, Fig. 2 is a longitudinal sectional side view thereof, Fig. 3 is a front view thereof, and Fig. 4 is a front view of the shoring portion thereof. Figure 5 is a vertical cross-sectional view of the explosion-proof sheet attachment material, Figure 6 is a vertical cross-sectional view showing another embodiment of the present invention, and Figure 7 is a cross-sectional plan view showing still another embodiment of the present invention. 8 to 10 are longitudinal cross-sectional views showing other embodiments of the present invention, FIGS. 11 to 13 show the relationship between the blasting area and the explosion-proof sheet attachment location, and FIG. 11 is a plan view. , FIGS. 12 and 13 are front views, and FIG. 14 is an oblique view of the S-shaped ring. 1... Shoring, 3... Rubber mounting material, 4... Explosion-proof sheet, 10... Structure, 12... Spring.

Claims (1)

[Scope of utility model registration request] An impact force isolating device characterized in that an impact protection sheet is attached to a support on the inner peripheral surface of the hole-like space via an elastic body, and the hole-like space on which impact force acts is partitioned off by the sheet.