JP3455437B2 - How to penetrate the ground - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for penetrating a penetrating body into the ground, and more particularly to a method suitable for penetrating a penetrating body such as a tunnel lining material into the ground having a shallow soil cover. .

[0002]

2. Description of the Related Art As one of construction methods for constructing a tunnel crossing under a railway or a road, a URT (URT) for lining using a large number of lining elements made of long rectangular steel pipes.
nder Railway / Road Tunnel)
The construction method is known.

In this URT method, a large number of steel pipe elements and PCs are used as lining materials before tunnel excavation.
By propelling and towing the element, it penetrates into the ground and constructs a tunnel lining wall. However, if the lining element is promoted and towed on the ground where the earth cover is shallow,
The soil above the element may be dragged and moved in the propulsion / traction direction due to friction, and may deform the track or road.

Conventionally, methods as shown in FIGS. 10 and 11 have been known as a friction reducing measure therefor. Figure 1
In the method shown in 0, the temporary lining element 52 is FC (Friction) from the starting shaft 50 to the reaching shaft 51.
n Cut) The plate 53 is preliminarily penetrated into the ground 54, and then the temporary lining element 52 is pulled out and the main lining element 55 is penetrated into the ground 54 along the FC plate.

According to this method, since the lining element 55 comes into contact with the soil through the FC plate 53 when the lining element 55 of the permanent construction is propelled and towed, a friction reducing action can be expected, but temporary construction is possible. It cannot be expected when the lining element 52 is pushed or pulled, and the construction accuracy is not good. In addition, the number of times of propulsion and towing increases, so that there is a greater risk that the track or road will be deformed.

Further, in the method shown in FIG. 11, when the lining element 55 is propelled / pulled, the lubricant 56 is injected from the blade end portion of the tip toward the outer periphery. However,
The lubricant 56 does not surely reach the outer periphery of the element 55,
Moreover, it was difficult to quantify the design, and the economy was poor.

[0007]

The present invention has been made based on the above technical background, and achieves the following objects. An object of the present invention is to provide a penetration method that reliably reduces a frictional force between the ground when a penetration material such as a tunnel lining material is penetrated into the ground and does not give a deformation to a track or a road. Especially.

[0008]

The present invention employs the following means in order to achieve the above object. That is, upon the present invention, to penetrate the penetrating body to ground, small
Even if the flexible plate has one surface that is smooth,
While mounting the roll body on the tip of the penetrating body,
Before facing the flexible plate pulled out from the roll body
On the outer peripheral surface of the penetrating body, the other surface with a smooth surface
The flexible plate and insert the opening
Fixed at the starting position, and flexible as the penetrating body penetrates.
A flexible plate whose smooth surface contacts the surface of another plate
In penetration method intrusions into the ground, characterized in that withdrawing the so that.

[0009]

As the flexible plate, a plate in which a smooth surface layer and a rough surface layer are laminated can be used. A flexible plate in which a smooth surface layer and a rough surface layer are laminated can be used as the other plate.

The penetrating body penetrates the ground in a substantially horizontal direction. The penetrator has a rectangular cross section and the plate is drawn out at least on its upper surface. The penetrating body is, for example, a lining material for tunnel lining.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a flexible plate used for implementing the present invention. The flexible plate 1 has a laminated structure of a smooth surface layer 2 and a rough surface layer 3. The smooth surface layer 2 is made of, for example, ultra-high molecular weight polyethylene, and the rough surface layer 3 is made of, for example, a rubber-based material by a calender molding method. To be done. The total thickness of the plate 1 is about 0.5 to 3.0 mm.

FIG. 2 is a sectional view showing a reference example of the present invention. FIG. 2 shows a lining element 4 for tunnel lining as a penetration. The lining element 4 is made of a steel pipe having a rectangular cross section, PC (precast concrete) or the like, and a blade opening 5 is connected to the tip thereof. The plate 1 is attached in advance to the outer peripheral surface of the lining element 4 including the blade portion 5.

FIG. 3 is an enlarged sectional view showing a state in which the plate 1 is attached to the lining element 4. Specifically, the plate 1 is attached via an adhesive or the like so that the rough surface layer 3 contacts the outer peripheral surface of the lining element 4, that is, the surface becomes a smooth surface. As shown in FIG. 4A, the attachment surface of the plate 1 has a lining element 4
May be the upper surface only, or may be the entire outer peripheral surface as shown in FIG.

The lining element 4 penetrates into the ground 8 by horizontally propelling and pulling it from a starting shaft 7 provided with a retaining wall 6. At that time, the lining element 4 and the plate 1 integrally move relative to the soil, but since one surface defining the friction surface F is the smooth surface layer 2, the friction is reduced and the element 4 The soil above the area does not move. In the case of this reference example , the plate is not limited to the flexible plate 1 shown in FIG. 1, but a metal plate such as stainless steel or a rigid plastic plate may be used.

FIG. 5 is a sectional view showing another reference example of the present invention. In this reference example , the flexible plate 1 shown in FIG. 1 is used as a roll body 10 and housed in the blade opening 5 at the tip of the lining element 4. The starting end of the plate 1 is fixed to the penetration start position, for example, the earth retaining wall 6 via a stopper 11.
Therefore, when the lining element 4 is propelled and pulled into the ground 8, the plate 1 is pulled out from the roll body 10.

FIG. 6 is an enlarged sectional view showing a state where the plate 1 is pulled out. The plate 1 is pulled out so that the smooth surface layer 2 contacts the upper surface of the lining element 4. That is, it is the rough surface layer 3 that is in contact with the soil. Therefore, according to this reference example , the soil and the plate 1 are integrally moved relative to the lining element 4, and friction is generated between the plate 1 and the lining element 4. Does not move at all. Since one surface defining the friction surface F is the smooth surface layer 2, the frictional force becomes extremely small, and the lining element 4 can be smoothly propelled and pulled.

In the case of this reference example , as the plate, a flexible plate having at least one surface being a smooth surface may be used. Therefore, not only the plate 1 shown in FIG. It is also possible to use an open plate. However, by using the plate 1 shown in FIG. 1, that is, the plate in which the other surface is a rough surface, the integration of the plate and the soil can be expected as described above. Even in the case of this reference example , by mounting a plurality of roll bodies 10 as shown in FIG.
As shown in (b), the lining element 4 can be pulled out to the entire outer peripheral surface.

FIG. 8 is a sectional view showing an embodiment of the present invention. In this embodiment, the same roll body 10 as described above is housed in the blade opening portion 5, and another plate 21 is attached to the outer peripheral surface of the lining element 4 facing the plate 1. The other plate 21 may be the plate 1 including the smooth surface layer 2 and the rough surface layer 3 as in the plate 1 shown in FIG. 1, or the metal or rigid plastic plate described above.

In any case, the other plate 21 is attached to the outer peripheral surface of the lining element so that the surface becomes a smooth surface. FIG. 9 is an enlarged sectional view showing a state where the plate 1 is pulled out. According to this embodiment, since both surfaces defining the friction surface F are the smooth surface layers 2, the friction force is further reduced. Also in this embodiment, another plate 21 may be attached to the entire outer peripheral surface of the lining element 4 and the plate 1 may be drawn out to the entire outer peripheral surface.

The above embodiment is merely an example, and the present invention can be modified in various ways. For example, although the lining element, that is, the tunnel lining material is shown as the penetrating body in the above-described embodiment, the present invention is not limited to this and can be applied to the case of penetrating an RC box or another structure. The present invention can be implemented regardless of its shape and size.

[0022]

As described above, according to the present invention, it is possible to reliably reduce the frictional force with the soil when the penetrating body such as the tunnel lining material is penetrated into the ground. Therefore, the following effects can be obtained. (1) Since the deformation of the track and road can be suppressed, track maintenance can be reduced, and safety and reliability are improved. (2) It is economical because it is possible to reduce the rank of the thrust jack and other abilities. (3) The construction cycle becomes faster and the construction period can be shortened. (4) The construction accuracy of the penetrating body such as the element is improved without applying an excessive thrust, and the quality is improved. (5) Since the construction period can be shortened, it is possible to minimize the work of slowing trains and closing railroad tracks at night.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a flexible plate used for implementing the present invention.

FIG. 2 is a sectional view showing a reference example of the present invention.

FIG. 3 is an enlarged cross-sectional view showing an attached state of the plate.

FIG. 4 is a cross-sectional view showing an attachment mode of plates.

FIG. 5 is a cross-sectional view showing another reference example .

FIG. 6 is an enlarged cross-sectional view showing a state in which a plate is pulled out.

FIG. 7 is a cross-sectional view showing an example in which a plurality of roll bodies are mounted.

FIG. 8 is a sectional view showing an embodiment of the present invention .

FIG. 9 is an enlarged sectional view showing a state in which a plate is pulled out.

FIG. 10 is a cross-sectional view showing a conventional example.

FIG. 11 is a cross-sectional view showing another conventional example.

[Explanation of symbols]

1: Flexible plate 2: Smooth layer 3: Rough surface layer 4: Lining element 5: Blade part 6: Earth retaining wall 7: Starting shaft 8: Ground 10: Roll body 11: Stopper 21: Other plate F: Friction surface

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsusho Ohba 2-2 Yoyogi, Shibuya-ku, Tokyo Within East Japan Railway Company (72) Harumi Tabata 2-2 Yoyogi, Shibuya-ku, Tokyo No. East Japan Railway Company (72) Inventor Yoshio Mochizuki 2-3-5 Misaki-machi, Chiyoda-ku, Tokyo Inside Kenken Construction Co., Ltd. (72) Kyoei Kobayashi 2-3-5 Misaki-cho, Chiyoda-ku, Tokyo No. Tekken Construction Co., Ltd. (72) Inventor Kazuyoshi Ito 2-3-5 Misaki-cho, Chiyoda-ku, Tokyo Iron-Construction Co., Ltd. (72) Satoshi Nakajima 2-3-5 Misaki-cho, Chiyoda-ku, Tokyo Iron Construction Construction Co., Ltd. (56) References JP-A-60-80685 (JP, A) JP-A-48-35618 (JP, A) Actual development Sho-56-115230 (JP, U) JP-B-55-12515 (J P, B1) (58) Fields surveyed (Int.Cl. ⁷ , DB name) E21D 9/04 E21D 9/06 311

Claims (6)

(57) [Claims] 1. When a penetrating body is penetrated into the ground, a roll body of a flexible plate, at least one surface of which is a smooth surface, is attached to the tip of the penetrating body, and the roll body is installed.
The pierce facing the flexible plate pulled out from the
Other plates with a smooth surface on the outer peripheral surface of the container
And fixing the starting end of the flexible plate to the penetration start position, and withdrawing the flexible plate so that its smooth surface contacts the surface of the other plate as the penetration body penetrates. A method for penetrating a penetrating body into the ground. 2. The method for penetrating an intruder into a ground according to claim 1, wherein the flexible plate is a plate in which a smooth surface layer and a rough surface layer are laminated. 3. The method of claim 1, wherein the other plate is a flexible plate in which a smooth surface layer and a rough surface layer are laminated. 4. The method for penetrating an intruder into the ground according to claim 1, wherein the intruder is penetrated into the ground in a substantially horizontal direction. 5. The method for penetrating an intruder into the ground according to claim 4, wherein the intruder has a rectangular cross section, and the plate is pulled out at least on an upper surface thereof. 6. The method for penetrating an intruder into the ground according to any one of claims 1 to 5, wherein the intruder is a lining material for tunnel lining.