JP7018800B2 - Installation method of steel earth retaining material installation equipment and liner plate - Google Patents

Description

The present invention relates to a steel earth retaining material installation tool used for installing a liner plate on a shaft wall of a shaft and a method for installing a liner plate using a steel earth retaining material installation tool.

Conventionally, liner plates used for lining materials such as shafts and catchment wells are known.
For example, when constructing a shaft for the deep foundation method, a liner plate is installed on the shaft wall of the shaft to retain the soil.

A construction method using a steel cutting edge to protect the shaft wall of a shaft during excavation until the liner plate is installed is known (see, for example, Patent Document 1).
In this construction method, when the shaft is shallow, multiple steel blades are arranged in a cylindrical shape along the shaft wall with the blade edge body protruding to the bottom of the shaft, and each steel blade is sequentially placed at the bottom of the shaft. While press-fitting into the shaft, the earth and sand inside the cylindrical steel blade edge is excavated to dig a shaft, and liner plates are installed in sequence while protecting the shaft wall.

Japanese Unexamined Patent Publication No. 7-42478

However, in the case of the construction method of Patent Document 1, since the steel cutting edge is press-fitted into the bottom of the mine by using a jack, if the jack is defective, the steel cutting edge cannot be press-fitted vertically. In some cases, if the jack breaks down, the construction may have to be interrupted.

An object of the present invention is to provide a steel earth retaining material installation tool and a method for installing a liner plate, which can suitably install a liner plate on the shaft wall during excavation while protecting the shaft wall. be.

In order to achieve the above object, the steel earth retaining material installation tool, which is one invention of the present application, is
A shield material that has a blade edge along the lower end and one side can be installed along the shaft wall of the shaft.
A movable plate connected to the other surface of the shield material so as to be slidable in the vertical direction,
Equipped with
The movable plates are connected in the vertical direction so as to have a range of motion equivalent to at least two liner plates, and the liner plates are configured to be connectable to the upper part and the lower part thereof.

If a steel earth retaining material installation tool having such a structure is installed on the shaft wall of the shaft, the shaft wall can be protected so as to be covered with a shield material.
The movable plate is connected to the shield material so as to have a range of motion equivalent to at least two liner plates. Therefore, if the movable plate is arranged on the lower side of the shield material, the movable plate is placed on the movable plate. The liner plate can be placed and connected, and if the movable plate is placed on the upper side of the shield material, the liner plate can be placed and connected under the movable plate. can.
A movable plate is slidably connected to this shield material, and the shield material and the movable plate are slidably movable with each other. Installation (1st step), with the movable plate placed on the lower side of the shield material of the steel earth retaining material installation equipment installed on the shaft wall of the shaft, join the liner plate on the movable plate. (2nd step), the shield material along the shaft wall of the shaft is lowered relative to the movable plate by its own weight so as to accompany the digging of the bottom of the shaft (3rd step). Disconnect the movable plate and the liner plate and slide the movable plate to the lower side of the shield material (4th step), between the existing liner plate and the movable plate, and on the movable plate. By repeating the process of joining a new liner plate (5th step), the shaft wall of the shaft being excavated is protected by the shield material of the steel earth retaining material installation equipment, and the liner plate is attached to the shaft wall. Can be suitably installed.

Also, preferably
A rail member extending up and down is provided on the other surface of the shield material.
The movable plate is provided with a guide member movably engaged along the rail member.

If a slide moving mechanism composed of a rail member provided on the shield material and a guide member provided on the movable plate is provided, the movable plate can be lowered relative to the shield material, or the movable plate can be used. On the other hand, the shield material can be lowered relatively.

In addition, other inventions according to this application
It is a method of installing a liner plate using the above-mentioned steel earth retaining material installation tool.
The first step of excavating a shaft having a depth corresponding to the steel retaining material installation tool, and installing the steel retaining material installation tool along the shield material along the shaft wall of the shaft.
With the movable plate placed on the lower side of the shield material, the liner plate is placed along the other surface of the shield material, and the lower part of the liner plate is joined to the upper part of the movable plate. Process and
A third step of lowering the shield material along the shaft wall of the shaft relative to the movable plate by its own weight so as to accompany the digging of the bottom of the shaft.
A fourth step of releasing the joint between the movable plate and the liner plate and sliding the movable plate to the lower side of the shield material.
A new liner plate is placed along the other surface of the shield material, the lower part of the new liner plate is joined to the upper part of the movable plate, and the upper part of the new liner plate is attached to the existing liner plate. The fifth step of joining to the bottom and
I tried to prepare.

According to the method of installing the liner plate having such a configuration, the liner plate can be suitably installed on the shaft wall while protecting the shaft wall of the shaft being excavated with the shield material of the steel earth retaining material installation tool.
In particular, if the steel earth retaining material installation equipment is installed in the shaft in a vertical posture in advance, the steel earth retaining material installation equipment that is lowered by its own weight as the shaft bottom is dug is vertical. You will keep your posture.
In this way, the liner plate can be installed on the shaft wall of the shaft by using the steel earth retaining material installation equipment installed in the vertical posture in the shaft, so that multiple liner plates installed in the vertical orientation can be installed. A cylindrical earth retaining structure composed of can be suitably constructed in a shaft.

Also, preferably
In the fifth step, the new liner plate is joined to the existing liner plate in a staggered arrangement.

By doing so, it is possible to construct an earth retaining structure having a stable structure in which a plurality of liner plates are assembled in a staggered arrangement.

Also, preferably
A cylindrical wall structure composed of a plurality of steel earth retaining material installation tools is installed in the shaft.
In the third step and the fourth step, each steel earth retaining material installation tool constituting the wall structure is individually lowered.

For example, if there are parts that are difficult to excavate or parts that are easy to excavate at the bottom of the shaft and it is not possible to dig uniformly, each steel earth retaining material installation tool that constitutes the wall structure is individually lowered. If the method of making the steel earth retaining material is adopted, the work can be proceeded so as to sequentially lower the equipment for installing the steel earth retaining material.

Also, preferably
A cylindrical wall structure composed of a plurality of steel earth retaining material installation tools is installed in the shaft.
In the third step and the fourth step, a plurality of steel earth retaining material installation tools constituting the wall structure are integrally lowered.

By vertically lowering the wall structure itself, it is possible to uniformly vertically lower a plurality of steel earth retaining material installation tools.

According to the present invention, the liner plate can be suitably installed on the shaft wall during excavation while protecting the shaft wall.

It is a front view (a), a top view (b), and a sectional view (c) which show the steel earth retaining material installation equipment of this embodiment. It is explanatory drawing about the range of motion of the movable plate of the instrument for installing a steel earth retaining material. It is an enlarged view of the slide moving mechanism of the equipment for installing a steel earth retaining material. It is a perspective view which shows the liner plate used for the lining material of a shaft with a partial cross-sectional view. It is explanatory drawing (a) (b) (c) (d) (e) (f) which shows the procedure of the installation method of the liner plate of this embodiment. It is a top view which shows the cylindrical wall structure composed of a plurality (six) steel earth retaining material installation equipment. It is explanatory drawing (a) (b) (c) (d) (e) which shows the procedure of the modification of the installation method of a liner plate.

Hereinafter, embodiments of the method for installing the steel earth retaining material installation device and the liner plate according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

In the steel earth retaining material installation tool 100 of the present embodiment, for example, as shown in FIGS. 1 (a), (b), (c), 2 and 3, one surface thereof is aligned with the shaft wall of the shaft. It includes a shield material 10 to be installed, and a movable plate 20 or the like that is slidably connected to the other surface of the shield material 10.

The shield material 10 is, for example, a steel plate curved in an arc shape, and a blade edge 11 is provided at the lower end thereof.
The blade edge 11 is fixed to the lower end portion of the shield material 10 with the sharp tip facing downward. The blade edge 11 has a curved shape that follows the arc shape of the shield material 10.
Then, when the steel earth retaining material installation tool 100 is installed on the shaft wall of the shaft, one surface of the shield material 10 curved outward is installed toward the shaft wall of the shaft.

The movable plate 20 is connected to the shield material 10 so as to be slidable in the vertical direction.
As shown in FIG. 2, the movable plate 20 can be switched between the arrangement on the lower side and the arrangement on the upper side of the shield material 10.
The movable plate 20 has a range of motion equivalent to at least two liner plates in the vertical direction.
That is, when the movable plate 20 of the steel earth retaining material installation tool 100 is arranged on the lower side of the shield material 10, one liner plate 1 described later can be installed on the movable plate 20, and the movable plate 20 can be installed. Is arranged on the upper side of the shield material 10, and one liner plate 1 described later can be installed under the movable plate 20.
Further, a liner plate 1 described later can be connected to the upper part and the lower part of the movable plate 20.

The slide moving mechanism of the movable plate 20 is composed of, for example, a rail member 30 and a guide member 40.
Specifically, as shown in FIGS. 1A, 1B, 3C, a rail member 30 extending vertically is provided on the other surface of the shield material 10, and the movable plate 20 is provided with a rail member 30 extending vertically. Is provided with a guide member 40 movably engaged along the rail member 30, and the movable plate 20 is moved with respect to the shield material 10 so that the guide member 40 moves along the rail member 30. It is designed to slide up and down.
In other words, the shield material 10 is movable up and down relative to the movable plate 20.

In particular, the movable plate 20 of the present embodiment is substantially the same as the liner plate 1 used for the lining material of the shaft.
As shown in FIG. 4, the liner plate 1 includes, for example, a corrugated steel plate 2 curved in an arc shape and axial flanges 3 arranged on both left and right sides of the corrugated steel plate 2. Further, the upper end portion and the lower end portion of the corrugated steel plate 2 are formed as circumferential flanges 4, respectively.
The axial flange 3 and the circumferential flange 4 are provided with connecting holes 3a and 4a, respectively. Using the connecting holes 3a and 4a, a plurality of liner plates 1 can be bolted in the vertical and horizontal directions to construct a cylindrical earth retaining structure in the shaft.

The movable plate 20 having substantially the same structure as the liner plate 1 has a circumferential flange 21 at its upper end and a lower end thereof, and the circumferential flange 21 is provided with a connecting hole 21a.
The liner plate 1 can be bolted to the circumferential flange 21 of the movable plate 20.

Next, a method of installing the liner plate using the steel earth retaining material installation tool 100 of the present embodiment will be described.

First, as shown in FIG. 5A, a shaft having a depth corresponding to the steel earth retaining material installation tool 100 is excavated, and the steel earth retaining material is installed along the shaft wall W of the shaft with the shield material 10. The equipment 100 is installed (first step).
For example, as shown in FIG. 6, a cylindrical wall structure composed of six steel earth retaining material installation equipment 100 installed on a shaft wall W of a shaft and the six steel earth retaining material installation equipment 100. 90 is installed in the shaft.
The wall structure 90 made of the steel earth retaining material installation tool 100 protects the shaft wall W under excavation until the liner plate 1 is installed on the shaft wall W of the shaft.
Here, the steel earth retaining material installation tool 100 (wall structure 90) installed in the shaft has a vertical posture in which the movable plate 20 connected to the shield material 10 slides vertically so as to be slidable up and down. It is installed so that it becomes.

Next, as shown in FIG. 5B, with the movable plate 20 arranged on the lower side of the shield material 10, the liner plate 1 is arranged along the other surface of the shield material 10 and the liner plate is arranged. The circumferential flange 4 at the lower part of 1 is joined to the circumferential flange 21 at the upper part of the movable plate 20 (second step).
The liner plate 1 installed on the peripheral edge of the opening of the shaft is fixed to the peripheral edge of the opening of the shaft (for example, reaction concrete cast on the peripheral edge of the opening of the shaft) by a well girder (not shown).

Next, as shown in FIG. 5 (c), the shield material 10 along the shaft wall W of the shaft is placed relative to the movable plate 20 by its own weight so as to accompany the digging of the bottom of the shaft. Lower (third step).
At this time, the bottom of the pit is dug so as to lower the shield material 10 until the movable plate 20 is arranged on the upper side of the shield material 10.
In this way, after the shield material 10 of the steel earth retaining material installation tool 100 is lowered, the shaft wall W of the shaft is protected by the liner plate 1 joined to the upper part of the movable plate 20.
Here, the liner plate 1 that protects the shaft wall W of the shaft becomes the existing liner plate 1 installed on the shaft wall W of the shaft.

Next, as shown in FIG. 5D, the joint between the movable plate 20 and the existing liner plate 1 is released, and the movable plate 20 is slid and moved to the arrangement on the lower side of the shield material 10 (fourth step).

Next, as shown in FIG. 5 (e), a new liner plate 1 is installed between the movable plate 20 and the existing liner plate 1.
Specifically, a new liner plate 1 is arranged along the other surface of the shield material 20, and the circumferential flange 4 at the lower part of the new liner plate 1 is changed to the circumferential flange 21 at the upper part of the movable plate 20. , And the circumferential flange 4 on the upper part of the new liner plate 1 is joined to the circumferential flange 4 on the lower part of the existing liner plate 1 (fifth step).
Here, the new liner plate 1 is joined to the existing liner plate 1 in a staggered arrangement.

Then, the work of the above-mentioned third step (see FIG. 5 (c)) to the fifth step (see FIG. 5 (e)) is performed by each steel retaining material installation tool 100 (six steel retaining materials in this embodiment). This is performed for the material installation tool 100).
In this way, as shown in FIG. 5 (f), at the stage where all the steel earth retaining material installation equipment 100 arranged all around the shaft wall W is lowered by one step, the first step is applied to the shaft wall W. Liner plate 1 can be installed.

After that, the work of the third step (see FIG. 5 (c)) to the fifth step (see FIG. 5 (e)) described above is repeated to obtain the steel earth retaining material installation tool 100 (wall structure 90). The liner plate 1 as the second stage, the liner plate 1 as the third stage, and so on are sequentially installed while being lowered stepwise.
In this way, if a shaft is excavated to a predetermined depth and a plurality of liner plates 1 are installed on the shaft wall W, a cylindrical earth retaining structure composed of the plurality of liner plates 1 is constructed in the shaft. be able to.

As described above, in the method of installing the liner plate using the steel retaining material installation tool 100 of the present embodiment and the steel retaining material installation tool 100, the shaft wall W of the shaft being excavated is protected. , The liner plate 1 can be suitably installed on the shaft wall W.

In particular, since the steel retaining material installation tool 100 installed in the shaft in a vertical posture in advance is lowered by its own weight as the shaft bottom is dug, the steel retaining material installation tool is lowered. 100 is designed to maintain a vertical posture.
Since the liner plate 1 can be installed on the shaft wall W of the shaft by using the steel earth retaining material installation tool 100 installed in the shaft in a vertical posture in this way, a plurality of equipment installed in the vertical direction can be installed. A cylindrical earth retaining structure composed of the liner plate 1 can be suitably constructed in a shaft.

On the other hand, in the case of the conventional technology in which the steel blade edge is press-fitted into the bottom of the mine using a jack, the posture of the jack can be kept vertical and the moving direction of the jack can be adjusted vertically. It was complicated and complicated.
If there is a deviation in the posture or orientation of the jack in the conventional technology, the liner plate may not be installed properly because the steel blade edge cannot be press-fitted vertically (the liner plate cannot be installed vertically). That could be a problem.
On the other hand, in the case of the steel earth retaining material installation tool 100 (method of installing the liner plate) according to the present invention, it is easy to maintain the steel earth retaining material installation device 100 installed in the shaft in a vertical posture, and the shaft shaft. It is possible to properly install the liner plate 1 on the wall W.

The present invention is not limited to the above embodiment.
In the above embodiment, the procedure for individually lowering each steel retaining material installation tool 100 constituting the wall structure 90 (see FIGS. 5 (c) to 5 (e)) has been described as an example. For example, as shown in FIGS. 7 (a) to 7 (e), a plurality of steel earth retaining material installation tools 100 constituting the wall structure 90 may be integrally lowered (particularly). , See FIGS. 7 (c) and 7 (d).

For example, as shown in FIG. 7 (c), a plurality of shield materials 10 along the shaft wall W of the shaft are weighted by their own weight so as to be accompanied by uniformly excavating and digging the bottom of the shaft. It is lowered relative to the movable plate 20, and as shown in FIG. 7D, the joint between the movable plate 20 and the existing liner plate 1 is released, and the plurality of movable plates 20 are placed on the lower side of the shield material 10. You may slide it to the arrangement of.
In this case, the shield materials 10 and the movable plates 20 of the steel earth retaining material installation equipment 100 installed adjacent to each other may be joined to each other. In addition, in order to facilitate uniformly lowering the plurality of shield materials 10 and the plurality of movable plates 20, it is preferable that the adjacent shield materials 10 and the adjacent movable plates 20 are joined to each other.

By vertically lowering the wall structure 90 itself in this way, it is possible to uniformly vertically lower the plurality of steel earth retaining material installation tools 100.
Even in such a construction procedure, the liner plate 1 can be installed on the shaft wall W while protecting the shaft wall W under excavation.

In the above embodiment, the movable plate 20 of the steel earth retaining material installation device 100 has substantially the same structure as the liner plate 1, but the present invention is not limited thereto. However, the shape of the movable plate 20 is arbitrary as long as it is a plate member capable of bolt-joining the liner plate 1.

In addition, it goes without saying that the specific detailed structure and the like can be changed as appropriate.

1 Liner plate 2 Corrugated steel plate 3 Axial flange 3a Connecting hole 4 Circumferential flange 4a Connecting hole 10 Shielding material 11 Blade edge 20 Movable plate 21 Circumferential flange 21a Connecting hole 30 Rail member 40 Guide member 90 Wall structure 100 Steel Equipment for installing earth retaining material

Claims (6)

A shield material that has a blade edge along the lower end and one side can be installed along the shaft wall of the shaft.
A movable plate connected to the other surface of the shield material so as to be slidable in the vertical direction,
Equipped with
The movable plates are connected so as to have a range of motion equivalent to at least two liner plates in the vertical direction, and the liner plates are connectable to the upper and lower portions thereof. Installation equipment. A rail member extending up and down is provided on the other surface of the shield material.
The instrument for installing a steel retaining material according to claim 1, wherein the movable plate is provided with a guide member movably engaged with the rail member. A method for installing a liner plate using the steel earth retaining material installation tool according to claim 1 or 2.
The first step of excavating a shaft having a depth corresponding to the steel retaining material installation tool, and installing the steel retaining material installation tool along the shield material along the shaft wall of the shaft.
With the movable plate placed on the lower side of the shield material, the liner plate is placed along the other surface of the shield material, and the lower part of the liner plate is joined to the upper part of the movable plate. Process and
A third step of lowering the shield material along the shaft wall of the shaft relative to the movable plate by its own weight so as to accompany the digging of the bottom of the shaft.
A fourth step of releasing the joint between the movable plate and the liner plate and sliding the movable plate to the lower side of the shield material.
A new liner plate is placed along the other surface of the shield material, the lower part of the new liner plate is joined to the upper part of the movable plate, and the upper part of the new liner plate is attached to the existing liner plate. The fifth step of joining to the bottom and
How to install the liner plate, which is characterized by being equipped with. The method for installing a liner plate according to claim 3, wherein in the fifth step, the new liner plate is joined to the existing liner plate in a staggered arrangement. A cylindrical wall structure composed of a plurality of steel earth retaining material installation tools is installed in the shaft.
The installation of the liner plate according to claim 3 or 4, wherein in the third step and the fourth step, each steel earth retaining material installation tool constituting the wall structure is individually lowered. Method. A cylindrical wall structure composed of a plurality of steel earth retaining material installation tools is installed in the shaft.
The liner plate according to claim 3 or 4, wherein in the third step and the fourth step, a plurality of steel earth retaining material installation tools constituting the wall structure are integrally lowered. Installation method.

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