JPH0561300U - Sound barrier for tunnel - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a noise barrier for reducing vibration noise leaking outside the tunnel when the tunnel is excavated by blasting. [Structure] Sand 11 is filled between the wall slabs 2A and 2B arranged in a partitioning manner between the face of the tunnel 1 and the side of the well to enhance the noise blocking effect.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to a soundproof wall for a tunnel used in a blast type tunnel construction.

[0002]

[Prior Art]

 In general, when using blasting for excavation in tunnel construction, vibration and noise prevention measures for neighboring villages have become a major issue. Conventionally, sound barriers with a thickness of about 10 centimeters at multiple points between the wellhead and the face Was installed, and a door for the passage was installed in it.

[0003]

[Problems to be solved by the device]

 The conventional soundproof wall as described above does not provide a sufficient soundproofing effect, which causes a problem that the blasting work is limited in time.

Further, although the sound insulation effect can be enhanced by increasing the number of soundproof walls, it is costly and requires the provision of a door or a duct for each passage for each soundproof wall, which is uneconomical and requires a large amount of materials and materials. There was a problem that it was inconvenient to carry in and out the earth and sand.

In view of such a conventional problem, the present invention provides a sufficient soundproofing effect with only one soundproof wall, does not cause vibration noise in the vicinity, and does the blasting work without time constraint. The purpose is to provide a soundproof wall for excavation tunnels.

[0006]

[Means for achieving the object]

 The gist of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose is that in the tunnel soundproof wall that cuts off the face side of the tunnel during excavation from the side of the well A soundproof wall for a tunnel, characterized in that a space is provided between the wall slab facing the wall and the wall slab facing the wellhead side, and the space is filled with sand.

[0007]

[Action]

 In the soundproof wall of the present invention, the vibration transmitted in the air is blocked by the weight of the sand filled between the pair of wall bodies, and the distance between both wall bodies is increased and the thickness of the sand layer is increased. As a result, the sound insulation effect is enhanced. Normally, both doors in the aisle are not filled with sand, but when the sound insulation effect is low, both doors can be filled with sand.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 4 show a first embodiment of the present invention.

In the figure, reference numeral 1 is a tunnel formed by excavation. The face of the tunnel 1 and the side of the pit are separated by a pair of wall plates 2A and 2B. The two wall slabs 2A and 2B are constructed by attaching a steel corrugated plate 3b called a deck plate to a support 3a made of H-shaped steel, respectively, to block the inside of the tunnel 1. The two wall slabs 2A, 2B are provided with a main passage opening 4 in the central portion thereof, a sub passage opening 5 on the side portion thereof, and iron doors 6, 7 installed in the respective openings. ing. A passage is formed between the openings 4, 4 and between the openings 5 and 5, and the ceiling and both side portions are covered with the passage peripheral wall plates 8 and 9 in a tunnel shape. Further, a duct 10 for air supply passes through both wall slabs 2A and 2B near the ceiling of the tunnel 1.

Sand 11 is filled in the space between both wall slabs 2 A and 2 B except for the inside of the passages and the duct 10 described above.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, steel plates, for example, steel shells 20a, 20b, 20c, 20d each having a shape obtained by dividing the whole into four are stacked to form front and rear surfaces thereof. Are wall plates 21A and 21B on the face side and the wellhead side, and sand 22 is filled in each of the steel shells 20a to 20d. In this case, a main passage is provided in an arrangement surrounded by the respective steel shells 20a to 20d, doors 24 are installed at both openings of the main passages, and ducts 25 are preliminarily attached to the steel shells 20a so as to be attached beforehand. The passage is preformed in the steel shell 20d, and doors are attached to both ends.

In this embodiment, the soundproof wall can be carried in and out separately for each steel shell.

FIGS. 6 and 7 show a third embodiment of the present invention. In this embodiment, wheels 31, 31, ... Are laid on rails 30, 30 laid on the roadbed of the tunnel 1. The platform slabs 32, 32 are loaded so that they can travel, and the platform slabs 32, 32 are supported by them, and the columns 33, 33 and girders 34 made of H-shaped steel are assembled in a portal configuration, and the inside of the portal is main. There is no passage, and iron doors 36 are attached to the openings at both ends. A large number of sand-filled steel shell blocks 35, 35 ... Are stacked on the platform 32, 32 and the girder 34 to form a soundproof wall. Sliding rings 37A and 37B are attached to the outer peripheries of both sides of the soundproof wall to close between the both sides of the tunnel, and sand 38 is packed between both rings 37A and 37B.

According to this embodiment, the soundproof wall can be moved forward without disassembling in accordance with the above description of the face.

In the first embodiment, when the distance between the front and rear wall plates 2A and 2B is about 1 m, the noise condition of each part at the time of blasting is as shown in the table below.

[0017]

[Table 1]

[0018]

[Effect of the device]

 As described above, since the tunnel soundproof wall of the present invention has a structure in which sand is filled between the front and rear wall slabs, the sound insulation effect is sufficient only by installing in one place by making the thickness more than a certain value. It is affordable and does not cost much to install.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outline of a first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same as before sand filling.

FIG. 4 is a side view of the same.

FIG. 5 is a perspective view showing the outline of a second embodiment of the present invention.

FIG. 6 is a front view showing a third embodiment of the present invention.

FIG. 7 is a side view of the above.

[Explanation of symbols]

 1 tunnel 2A, 2B wall slab 3a support 3b steel corrugated plate 4 main passage opening 5 sub passage opening 6,7 door 8,9 passage peripheral wall plate 10,25 duct 11,38 sand 20a, 20b, 20c, 20d Steel shells 21A, 21B Wall plates 23, 35 Main passages 24A, 24B Doors 30 Rails 31 Wheels 32 units 33 Supports 34 Girders 35 Steel shell blocks 36 Iron doors 37A, 37B Sliding rings

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Hiroki Watanabe 2-1, Nishi-Kannon-cho, Nishi-ku, Hiroshima City Yoshin Construction Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. In a soundproof wall for a tunnel, which cuts off the face side and the pit side of a tunnel being excavated, a gap is provided between the wall face facing the face face and the wall face facing the pit side. A soundproof wall for tunnels, which is characterized by being filled with sand.