JPH10266210A - Protective wall connecting device for banking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a protective wall connecting device by which the strong fixing of a protective wall can be enabled, and even in the case of an earthquake, the separation between the banking part and protective wall and the supporting ground can be prevented. SOLUTION: A protective wall connecting device for a banking part H is provided with a ground anchor 2 that is embedded inside a supporting ground G, and a tie-rod 3 for fixing the protective wall for preventing the collapse from the side surface of the banking part H that has been constructed on a supporting ground G. In that case, the ground anchor 2 is exposed to the outside surface of the supporting ground G, it is provided with a head part 4 which is brought into surface-contact with the outside surface, and the tie-rod 3 is formed so as to be capable of being connected to the head part 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment protection wall connecting apparatus applied to a lightweight embankment method.

[0002]

2. Description of the Related Art When embankment works are performed on soft ground or landslides, there is a concern that the supporting ground will sink or slide due to the weight of the embankment. As a construction method for this, conventional EPS (Ex
A lightweight embankment method such as a panded Poly-Styrol (foamed styrene) method and a foamed resin method is known. This lightweight embankment method has a wide field of application and covers all civil engineering works. In recent years, due to requests for reduction of construction work costs, countermeasures against the shortage of skilled workers due to aging, and review of seismic resistance of structures, lightweight embankment method has been adopted to save labor for ground improvement, shorten construction period, and improve earthquake resistance. Adoption is increasing.

[0003] In the construction of new or improved roads, or in the construction of roads, for example, in the construction of styrofoam blocks on the valley side by the EPS method, at the same time as measures to prevent separation between the blocks and existing ground, these blocks and self-standing walls are used. That is, integration by bonding with a protective wall is also required. FIG. 3 shows a cross section of an embankment construction section using a styrene foam block which has been conventionally performed. As shown
An EPS block B is piled up between a supporting ground G, which is an existing ground, and a protection wall P erected on the supporting ground G to form an embankment H, and the ground anchor 21 buried in the supporting ground G. And a tie rod 22, one end of which is fixed to the protective wall P, is pin-coupled by eyebolts 23 and 24 to the protective wall coupling device 20.
Integration is achieved.

More specifically, the ground anchor 21
Is partially buried in the supporting ground G, but in the example shown here, about a third of the entire length is exposed on the supporting ground G, and An eyebolt 23 is attached to an end via a coupler 25. One end of the tie rod 22 on the side of the protective wall P has, for example, a structure shown in FIGS. Of these, in the case of the type shown in FIG.
A claw member 28 rotatably supported by a bolt 27 as a center is mounted on a base 26 having a through hole (not shown) through which the end of the tie rod 22 has a bolt function at the center. The tie rod 22 and the protective wall P are joined by pressing the base portion 26 away from the H-shaped steel with a nut 30 screwed to the end of the tie rod 22 so as to sandwich the tie rod 22 from both sides. .

In the case of the type shown in FIG. 5, a U-shaped piece 31 having a through hole (not shown) through which the end of the tie rod 22 passes is similarly sandwiched from both sides of the flange of the H-shaped steel 29. The tie rod 22 and the protection wall P are joined by pressing the base 33 away from the H-shaped steel 29 with the nut 32 screwed to the end. On the other hand, the other end of the tie rod 22 is provided with the above-mentioned eyebolt 24 via a turnbuckle 34 for adjusting the length.
It is pin-connected by the eyebolt 23 on the side and the bolt / nut 35. Finally, except for the joint between the tie rod 22 and the protective wall P, the ground anchor 21 and the tie rod 22 are buried on the embankment H by placing concrete on the embankment H and further performing general civil works such as pavement. Construction is completed in the state where it was left.

[0006]

In the case of the above-mentioned conventional protective wall connecting device 20, a considerable portion of the ground anchor 21 is exposed from the supporting ground G, as is apparent from FIG. It extends along the slope on the G side, and is pin-connected to the end of the tie rod 22 at the end of the extended ground anchor 21. This grand anchor 21
If the angle between the fixing surface and the horizontal plane is θ for reasons such as securing the adhesion performance of the fixing unit, the fixing unit is generally installed at an angle within a range of θ ≦ 45 °. On the other hand, this ground anchor 2
A large lateral load acts in a direction away from the slope of the support ground G from the tie rod 22 to one end. However, since the overhanging portion exposed on the ground surface of the ground anchor 21 is large, when this lateral load is applied, the tie rod 22 is easily bent, so that tension cannot be applied to the tie rod 22 and the protection wall P There is a problem that almost no fixing action, that is, the function of preventing falling down can be exerted. The present invention has been made to solve such a conventional problem,
An object of the present invention is to provide a protective wall connecting device for an embankment portion, which enables a strong fixation of the protection wall and prevents separation between the embankment portion and the protection wall and the supporting ground even during an earthquake.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a ground anchor buried in a supporting ground and a side wall of an embankment connected to the ground anchor and built on the supporting ground. In a protective wall coupling device for an embankment portion comprising a tie rod for fixing a protective wall for preventing collapse of the ground, the ground anchor is exposed on the outer surface of the supporting ground, and has a head in surface contact with the outer surface. The head was formed so as to be pin-connectable.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show a cross section of an embankment construction section to which the protective wall coupling device 1 for an embankment section according to the present invention is applied, and portions common to the cross section of the embankment construction section shown in FIG. The same numbers are assigned and the description is omitted. The protective wall coupling device 1 includes a ground anchor 2 and a tie rod 3. The ground anchor 2 is buried in the support ground G, except for the head 4 that is in surface contact with the outer surface of the support ground G. The head 4 has a main body 8 having a fixing plate portion 5 in surface contact with the outer surface, and a cylindrical portion 7 having a through hole through which an end portion 6 of a tie rod 3 formed with an external thread at the end of the ground anchor 2. And an end of the end 6 of the ground anchor 2 that has been exposed to the surface of the ground through the through hole;
It is composed of a nut 9 which is screwed to the external thread of this end 6.

[0009] Except for the head 4 of the ground anchor 2,
After being buried and fixed in the supporting ground G, the main body 8 is pressed against the supporting ground G by the nut 9, and is fixed in a state where the main body 8 is firmly in surface contact with the supporting ground G surface. An eyebolt 11 is fixed to the end of the tie rod 3 on the ground anchor 2 side via a turnbuckle 10 for adjusting the length. The eye bolt 11 and the main body 8 are relatively rotatably pin-coupled to each other by a bolt / nut 12 which is an example of a pin member. The end of the tie rod 3 on the side of the protective wall P is substantially the same as that shown in FIGS.

As described above, in the protective wall coupling device 1, only the head 4 of the ground anchor 2 is located outside the supporting ground G,
Since the head 4 is exposed in surface contact with the outer surface of the supporting ground G, the head 4 is firmly fixed to the outer surface, and the head 3 is not displaced so that the axis of the ground anchor 2 is bent. It has become. Therefore, as a result of the head 4 of the ground anchor 2 being firmly fixed, a strong tension can be applied also to the tie rod 3, and the protective wall P is firmly fixed. In addition, this tie rod 3
As described above, after the fixing is performed, construction for finishing is performed thereon. The present invention is not limited to the application to the above-described EPS method, but is applied to the entire lightweight embankment method including the foamed resin method.

[0011]

As is apparent from the above description, according to the present invention, the ground anchor buried in the support ground and the ground anchor connected to the ground anchor from the side of the embankment part built on the support ground In a protective wall coupling device for an embankment portion comprising a tie rod for fixing a protective wall for preventing collapse, the ground anchor is exposed on an outer surface of a supporting ground, and has a head in surface contact with the outer surface. A pin was formed on the head so that it could be connected. For this reason, the protection wall can be firmly fixed, and there is an effect that the separation between the embankment portion, the protection wall, and the support ground can be prevented even during an earthquake.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embankment to which a protective wall coupling device according to the present invention is applied.

FIG. 2 is a diagram showing details of a pin connecting portion between a ground anchor and a tie rod in FIG. 1;

FIG. 3 is a cross-sectional view showing an embankment to which a conventional protective wall coupling device is applied.

FIG. 4 is a view showing details of an example of a conventional joint between a tie rod and a protective wall.

FIG. 5 is a view showing details of another example of a conventional joint between a tie rod and a protective wall.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Protective wall coupling device 2 Ground anchor 3 Tie rod 4 Head 5 End B EPS block G Supporting ground H Embankment P Protective wall

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuo Matsushita Benzai Tencho, which rises on the Ikawa River in Shinmachi-dori, Nakagyo-ku, Kyoto, Kyoto (no address is displayed) (72) Inventor Shoichi Yokochi 1-1 Koraku, Bunkyo-ku, Tokyo 1 Within Kanepal Service Co., Ltd. (72) Inventor ▲ Taka ▼ Masaharu Ki 2-4-413 Asiyagaoka-cho, Ashiya-shi, Hyogo Loyal-arc Ashiya (72) Inventor Takahiko Yoneda 2-189-306 Kita-Hanada-cho, Sakai-shi, Osaka

Claims (1)

[Claims] 1. An embankment portion comprising a ground anchor buried in a supporting ground and a tie rod fixed to the ground anchor for fixing a protection wall for preventing collapse from a side surface of the embankment portion built on the supporting ground. An embankment, wherein the ground anchor is exposed on the outer surface of the supporting ground, has a head in surface contact with the outer surface, and the tie rod is formed so as to be pin-connectable to the head. Protective wall coupling device.