JPH09268873A - Liner plate and its assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assemble and disassemble an earth retaining wall, a container, and a bank body with excellent workability using a liner plate, and to provide the tensile strength required for a large structure. SOLUTION: A circumferential flange 12 and an axial flange 13 having connection holes are provided in four sides of a corrugated steel plate 11 which is curved in an arc shape. The circumferential flange 12 is projected in the curved outer circumferential side, and the connection holes 15 in the axial flange 13 are provided in an outer circumferential groove part of the corrugated steel plate 11. A notch 17 of the shape to prevent a wire from being detached is preferably provided in a part of the outer circumferential groove part of the axial flange 13. The liner plates 1 are connected to each other by bolts in the vertical and right-to-left direction to make a cylindrical structure, and the wire is wound for tightening, if necessary. The assembling and disassembling works can be performed only on the outer side of the cylindrical structure to improve the workability, and the number of bolts to be used for joining can be reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liner plate cell structure container which can be used as a retaining wall for tunnels and shafts, and is also used for aggregate bins, silos, water tanks, breakwaters,
TECHNICAL FIELD The present invention relates to a liner plate that can be used as a material for assembling a liner plate cell levee used for quays, seawalls, artificial islands, etc.

[0002]

2. Description of the Related Art As shown in FIGS. 10 and 11, a liner plate has a corrugated steel plate 11 curved in an arc shape and provided with circumferential flanges 12 and axial direction flanges 13 having connecting holes 14 and 15 on four sides. It is possible to assemble a cylindrical structure by abutting in the up, down, left and right directions and bolting them through the connecting holes 14, 15. The cylindrical structure thus assembled is often used, for example, in a tunnel or a retaining wall 21 for excavating a vertical shaft as shown in FIG.

FIG. 12 specifically shows a state in which the liner plate 1 is assembled to construct the earth retaining wall 21 while excavating a vertical shaft. First, as shown in FIG.
By digging a circular hole 22 having a depth corresponding to one liner plate, and arranging the liner plate 1 vertically in this circular hole 22 and joining them in the circumferential direction, as shown in FIG. , The uppermost step of the retaining wall 21 is constituted. The soil is backfilled and compacted in the gap between the retaining wall 21 and the natural ground 20. After that, as shown in FIG. 3C, the liner plate 1 is dug and the liner plate 1
Is arranged vertically below the uppermost earth retaining wall and joined in the circumferential direction to form the second earth retaining wall. The method of connecting the liner plate to the excavated portion and extending the soil retaining wall downward is called root joint. By repeating this root joint, the liner plate 1 is connected to the excavated portion to connect the soil retaining wall 21. As shown in FIG. 3D, the shaft can be excavated at a predetermined depth by extending the shaft.

On the other hand, a corrugated pipe is used for the same purpose as the liner plate. This is a corrugated steel plate without a flange. By stacking the ends and bolting them together, you can assemble earth retaining walls, etc., as well as containers such as aggregate bins, silos, and aquariums. .

Comparing the liner plate and the corrugated pipe, since the flange is provided in the liner plate, in order to join the liner plates to each other, the flanges may be butted and bolted together. You can do it only.
That is, since the work only on the inner side is required, the work efficiency is generally high, and the work space is not required on the outer side. Therefore, in the case of a retaining wall or the like, it is not necessary to dig or backfill the outer side. Also,
It is also economical that the liner plate requires fewer bolts for joining.

[0006]

However, even when excavating a shaft, if the radius of the shaft is small, the bottom of the shaft is narrow, and excavation and liner plate assembly cannot be performed at the same time. The efficiency of may decrease.

[0007] In addition, liner plates such as aggregate bins for storing aggregates such as sand and gravel, silos for storing grass and corn, containers for water tanks, breakwaters, quays, revetments, artificial islands, etc. In the case of assembling the dam body by filling a predetermined filling material such as earth and sand or gravel inside, the workability is conversely a problem. That is, when assembling a container or a bank, there is a work space outside, and materials and the like are also conveyed from the outside. Then, in the conventional liner plate that must be bolted inside, as assembly progresses, the worker must get over and work inside the liner plate that has been bolted, which results in poor workability. , You will also need a ladder to overcome the problem.

[0008] In addition, a container or a bank with a liner plate is often used for temporary construction, and must be disassembled after the intended purpose is reached. In the case of dismantling, not only does it have to go inside as in the case of assembly, but especially in the case of a dam body, since the inside is filled with earth and sand, gravel, etc. The sex becomes worse.

Further, in the conventional liner plate, there is also a problem that the bolt connection in the circumferential direction is weak. That is,
As shown in FIGS. 10 and 11, it is general that the axial flange 13 of the liner plate 1 is provided with four connecting holes 15, and the outside of a cylindrical structure such as a retaining wall is used. When a force is applied from the inside to the inside, the force applied to the bolt joint is compressive, so this is sufficient strength,
When a force is applied from the inside to the outside of a cylindrical structure such as the container or bank, the force applied to the bolt joint becomes a tensile force, and since the number of bolts is small, it can be applied to a large force such as a large structure. Cannot withstand, there is a risk of breaking. Moreover, since the connecting holes 15 are provided at four positions inside the corrugated steel plate 11 of the axial flange 13 as shown in FIG. 11, it is difficult to increase the number.

Therefore, the present invention improves the workability when assembling a retaining wall of a shaft with a small radius using a liner plate, or assembling / disassembling a container or a dam body,
Another object is to make up for the insufficient tensile strength in the circumferential direction and to withstand the force from the inside sufficiently without increasing the number of bolt joints.

[0011]

A liner plate of the present invention is a liner plate having a corrugated steel plate curved in an arc shape and provided with a circumferential flange having a connecting hole on four sides and an axial flange. The liner plate is characterized in that the connecting hole of the axial flange is provided in the outer peripheral side groove portion of the corrugated steel plate so as to project to the outer peripheral side.
When used in applications in which a large force is applied from the inside to the outside of a cylindrical structure, a notch with a shape that prevents the filaments from falling off may be provided in a part of the groove on the outer peripheral side of the axial flange. preferable. In addition, when the liner plates are joined in the vertical direction, the circumferential flanges of the upper and lower liner plates are butted against each other on the curved outer side of the surface formed by the corrugated steel plate when the liner plates are joined in the vertical direction. , Means that bolts can be joined on the outer peripheral side. The outer peripheral groove portion of the corrugated steel sheet refers to a portion that is a groove when the portion of the corrugated steel sheet is viewed from the curved outer peripheral side.

The liner plate of the present invention can be used as a retaining wall for a tunnel or a shaft with good workability during assembly as in the conventional case, and if it is bolted vertically and horizontally to form a cylindrical structure, the outside of the structure can be obtained. It is possible to construct a liner plate cell structure container that is filled with an object only by the operation described above. When the container is small, only bolt connection is sufficient, but when large and a large force is applied from the inside to the outside, the liner plate of the present invention with a notch in the axial flange is used in the vertical and horizontal directions. It will be bolted to form a cylindrical structure, and the filament will be wound and tightened through the notch. The filamentous body can be connected and tightened with a fixing member, and as the fixing member, the linear member has a shape along the shape of the groove portion on the outer periphery of the liner plate,
It is preferable that the pressure bearing surface and the through hole are inclined according to the direction of the filament. It is preferable to connect and tighten the filaments at multiple points on the outer circumference.Also, the diameter of the filaments should be thin at the top and thick at the bottom, and the liner plate should be thin at the top and thin at the bottom. It can also be thickened with.

A liner plate cell bank can be constructed by filling the inside of the liner plate cell structure container with a predetermined filling material.

The method for assembling the liner plate of the present invention constituting the earth retaining wall is such that when the earth retaining wall is formed in the excavated portion by assembling the liner plate of the present invention by bolting in the vertical and horizontal directions while excavating the shaft, A liner plate assembling method characterized in that the liner plate is added to the uppermost part of the liner plate at the top of the wall by bolting to extend the earth retaining wall upward, and as the excavation progresses, the entire earth retaining wall is lowered. .

The method for assembling the liner plate of the present invention which constitutes the liner plate cell dam body used in water is as follows. The liner plate of the present invention is assembled by bolt joining in the vertical and horizontal directions to form a cylindrical structure. When constructing a liner plate cell dam body to be filled with filling material and used in water, the liner plate is added to the upper part of the uppermost liner plate of the cylindrical structure on the water by bolt connection to raise the cylindrical structure upwards. It is a method for assembling a liner plate, which is characterized in that the liner plate is stretched in water and sequentially settled in water.

[0016]

1 and 2 show examples of the liner plate of the present invention. This is obtained by bending the conventional liner plate shown in FIG. 10 in the opposite direction, which allows the circumferential flange 12 that protrudes toward the curved inner peripheral side to project toward the outer peripheral side in the conventional liner plate. it can. The connecting hole 15 of the axial flange 13 is also arranged in the outer peripheral groove portion.

In the liner plate of the present invention, as shown in FIG. 1, since the circumferential flange 12 is projected to the curved outer peripheral side, when the liner plate 1 is assembled, the connecting hole 14 provided in the circumferential flange 12 is formed. The upper and lower liner plates can be joined to each other by passing bolts from the outer peripheral side. Further, also in the axial direction flange 13, since the connecting hole 15 is provided in the groove on the outer peripheral side of the corrugated steel plate, it is possible to similarly join the left and right liner plates from the outer peripheral side through the bolts. Even when the liner plate 1 of the present invention is bolted in the vertical and horizontal directions to form a cylindrical structure, the work outside the structure is sufficient, and it is not necessary to work over the structure inside. Also in the case of a bank, the filler does not stick to the bolts and workability during dismantling does not deteriorate.

This is sufficient when the structure is small and does not exert a large force, but when the structure becomes large and a large force is applied from the inside, as shown in FIGS. 1 (b) and 2 (b). In addition, a notch 17 having a shape that prevents the filament body from falling off is provided in a part of the outer peripheral groove portion of the axial flange 13. As a result, it becomes possible to supplement the tensile strength, which is insufficient by bolt joining alone, by winding the filament. Also in this case, notches are formed in all the groove portions, but notches are formed in a part, particularly in the central groove portion other than the upper and lower groove portions. No connecting hole is formed in the groove portion having the notch 17, but if all the groove portions are notched, the connecting hole is completely eliminated in the axial flange, and the cylindrical structure cannot be assembled by bolt joining. . Therefore,
In particular, the upper and lower groove portions are not cut out and the connection hole 15 is left, so that assembly by bolt connection is possible. Then, the filamentous body is wound through the notch 17 formed in the central groove to supplement the insufficient tensile strength.

FIG. 3 shows an example of constructing a retaining wall by the assembling method of the liner plate of the present invention. The same figure (a), (b)
As shown in Fig. 2, up to the point where a circular hole 22 having a depth corresponding to one liner plate is dug in the natural ground 20 and the liner plate 1 is circumferentially bolted to form a soil retaining wall for one step, This is the same as the conventional assembly method shown in FIG.
After that, while continuing excavation at the bottom of the shaft, the liner plate is added to the upper part of the already constructed retaining wall by bolting to extend the retaining wall upward as shown in FIG. Since the liner plate of the present invention can construct the earth retaining wall only by the bolt joining work on the outer side of the earth retaining wall, the work of extending the earth retaining wall upward can be performed only on the ground outside the shaft, and the workability is good. . Further, since the excavation work can be concentrated on the bottom of the shaft, the efficiency of the excavation work is improved. After that, as the excavation progresses, the entire retaining wall 21 is lowered as shown in FIG. 6 (d), while a liner plate is further added to the upper part of the retaining plate at the uppermost portion of the retaining wall by bolting to secure the retaining wall. Stretch upwards. Then, by repeating the upward extension of the earth retaining wall and the descent of the entire earth retaining wall as shown in FIG.
It is possible to excavate a vertical shaft having a predetermined depth shown in (d). Note that this is an example, and in addition to this, for example, a liner plate is bolted in the circumferential direction on a flat ground before excavation to first construct a one-step earth retaining wall on the ground and then excavate. However, it is also possible to repeat the upward extension of the retaining wall and the descent of the entire retaining wall.

The liner plate of the present invention can be constructed as a liner plate cell structure container by bolting in the vertical and horizontal directions to form a cylindrical structure. If the tensile strength is insufficient due to the bolt connection, the filament should be wound. As shown in FIGS. 1 and 2, the liner plate 1 of the present invention has a groove on the outer periphery which is suitable for running the linear body. Therefore, like the artificial island 9 shown in FIG. The filament body 2 may be wound along and tightened. At that time, since the axial flange 13 of the liner plate 1 protrudes into the groove portion and interferes with the winding of the filamentous body 2, the notch 17 is preliminarily provided as shown in FIGS. 1 (b) and 2 (b). The liner 2 will be wound using the liner plate. Since the notch 17 has a shape that prevents the filament body 2 from falling off, it suffices to hook the filament body 2 around the notch 17 and wind and tighten it. Other measures to prevent the filament body 2 from falling off are necessary. Absent. A normal steel wire can be used for the filament 2 as well as a high-strength steel wire, and the high-strength steel wire is preferable because it can be made thinner than a normal steel wire. Also, a synthetic resin filament may be used.

When constructing a liner plate cell dam body for use in water like the artificial island 9 shown in FIG. 4, in the liner plate assembly method of the present invention, the bolt connection of the liner plate is performed on the water such as a work boat. I will do the work. That is, on the water, the liner plate is added to the upper part of the uppermost liner plate of the cylindrical structure by bolting to extend the cylindrical structure upward, and the cylindrical structure is sequentially settled in water. In this case as well, the workability of the liner plate of the present invention is good because the structure can be extended upward only by bolting work on the outside of the cylindrical structure on water. If it is necessary to reinforce it with a filament, it can be rolled up on water.

When the liner plate cell structure container is filled with, for example, earth and sand to form the artificial island 9, the force applied from the inside to the outside of the cylindrical structure is small at the upper part,
It becomes larger toward the bottom. Therefore, in response to this, even within the height range in which reinforcement by winding the filament 2 is required, the diameter of the filament 2 may be reduced at the upper portion and the diameter of the filament 2 may be increased at the lower portion. Good. For the same reason, the thickness of the liner plate 1 can be thin at the upper portion and thick at the lower portion. For example, a liner plate having a plate thickness of 2.7 to 7.0 mm may be appropriately arranged.

For tightening the linear member 2, a turnbuckle 4 generally used for connecting the linear member 2 as shown in FIG.
Although not shown, a toggle mechanism can be used, and as shown in FIG.
It is also possible to use the fixing member 3 manufactured according to the shape of the groove portion on the outer periphery of the fixing member 3, and to make the left and right end members of the fixing member 3 penetrate the ends of the linear members 2 and screw and fasten them with the nut 8. In this case, since the linear member 2 wound in close contact with the liner plate 1 is separated from the liner plate 1 at the position of the fixing member 3, as shown in FIG. When placed perpendicular to the liner plate 1, the nut 8
One-sided contact occurs. Therefore, as shown in FIG. 6C, the pressure bearing surface 3a is arranged so as to be perpendicular to the tangential direction of the linear body 2.
Is preferably inclined. Also, although not shown,
It is preferable that the through-holes of the filament also be inclined in the same direction as the tangential direction of the filament 2. When the fixing member 3 is used, if the fixing member 3 is temporarily fixed to the corresponding portion of the liner plate 1 in advance, the work of tightening the linear member 2 becomes easy.

Further, as shown in FIG. 7, as an example of the fixing member, it is also possible to connect the linear members by using a pressure bearing plate 5 having a shape along the shape of the groove portion on the outer circumference of the liner plate. The pressure plate 5 is provided with two through holes 6 in the horizontal direction as shown in FIG. 4A or in the vertical direction as shown in FIG. As shown in FIG. 8, a terminal 7 is crimped to the end of the filamentous body 2 and a terminal process for threading is performed. Then, as shown in FIG. 7C, the ends of the filamentous body 2 are penetrated from both sides of the pressure bearing plate 5, one end is fixed with a nut 8, and the other end is pulled by a retracting jig by about 500 kg. After that, the filament body 2 can be connected by tightening with the nut 8.

The bearing plate 5 shown in FIG. 7 has a total length of 100.
This is fine when the radius of the cylindrical structure is large at about 150 mm and the cylindrical structure has a large radius, but when the radius is small, it is preferable to bend the bearing plate 5 along the outer shape of the liner plate. The material of the pressure bearing plate 5 is steel or the like, and can be manufactured by cutting or the like.

FIG. 9 shows a preferred embodiment of the bearing plate 5. FIG. 9A is a side view of the pressure bearing plate 5, and the lower portion of FIG. 9A has a shape that follows the shape of the groove on the outer circumference of the liner plate. FIG. 9B is a plan view of the pressure bearing plate 5, where the left pressure bearing surface 5a is inclined by 10 °, the right pressure bearing surface 5b is inclined by 5 °, and the through holes 6a, 6b are also inclined by 10 ° and 5 °, respectively. are doing. FIG. 9 (c) shows the linear body 2 using this bearing plate 5.
It is a top view which shows the situation which connects. The linear body 2 having the nut 8 fixed to the end is passed through the through hole 6b, and the pressure is supported by the pressure bearing surface 5b on the right side. A threaded end 7 is passed through the through hole 6a, tightened with a nut 8, and pressure is supported by the left bearing surface 5a. In this way, the bearing surface and the through hole are inclined according to the direction of the linear body, that is, the bearing surface is perpendicular to the tangential direction in which the linear body separates from the liner plate. By inclining the nuts so that they are in the same direction, it is possible to prevent the nuts from hitting each other at the connection points of the linear members.

The liner plate cell structure container or the liner plate cell dam body may be a large structure having a diameter exceeding 20 m. However, when it becomes large like this, the filaments 2 are connected at one place on the circumference. The tension of the filament 2 may not be uniform just by tightening it. Therefore, in order to make the tension of the wound filament 2 uniform on the circumference,
It is preferable to divide the filamentous body 2 to be wound into two equal parts, three equal parts, etc., and to connect and tighten them at a plurality of locations on the outer circumference.

[0028]

EFFECTS OF THE INVENTION According to the present invention, not only can the earth retaining wall of the shaft be constructed with good workability even when the radius of the shaft is small, but also the container and the dam body to which force is applied from the inside to the outside can be provided. It can be assembled and disassembled with good workability, and the number of bolts used for joining can be small.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a liner plate of the present invention.

FIG. 2 is a diagram showing an example of an axial flange of the liner plate of the present invention.

FIG. 3 is a diagram showing an example of constructing a retaining wall of a vertical shaft by a liner plate assembling method of the present invention.

FIG. 4 is a diagram showing an artificial island as an example of a liner plate cell dam body.

FIG. 5 is a diagram showing a turnbuckle as an example of a fixing member for a linear body.

FIG. 6 is a diagram showing an example of a linear fixing member.

FIG. 7 is a diagram showing a pressure plate as an example of a fixing member for a linear body.

FIG. 8 is a diagram showing an end portion of a linear body.

FIG. 9 is a diagram showing a preferred embodiment of a pressure bearing plate.

FIG. 10 is a perspective view showing a conventional liner plate.

FIG. 11 is a view showing an axial flange of a conventional liner plate.

FIG. 12 is a view showing a conventional example of constructing a soil retaining wall by assembling a liner plate while excavating a vertical shaft.

[Explanation of symbols]

 1 Liner plate 2 Striation body 3 Fixing member 3a Bearing surface 4 Turnbuckle 5 Bearing plate 5a Bearing surface 5b Bearing surface 6 Through hole 6a Through hole 6b Through hole 7 Terminal 8 Nut 9 Artificial island 10 Sea surface 11 Corrugated steel plate 12 Circumferential direction Flange 13 Axial flange 14 Connection hole 15 Connection hole 16 Water drainage hole 17 Notch 20 Rock 20 Earth retaining wall 22 Circular hole

Claims (4)

[Claims] 1. A liner plate provided with a circumferential flange having a connecting hole on four sides of a corrugated corrugated steel plate curved in an arc shape and an axial flange, wherein the circumferential flange is projected to the curved outer peripheral side to connect the axial flanges. A liner plate, characterized in that holes are provided in the groove on the outer peripheral side of the corrugated steel plate. 2. The liner plate according to claim 1, wherein a notch having a shape for preventing the filament from falling off is formed in a part of the outer peripheral groove portion of the axial flange. 3. When constructing the earth retaining wall at the excavated portion by assembling the liner plate according to claim 1 or 2 by bolt connection in the vertical and horizontal directions while excavating a vertical shaft, the liner plate is further provided above the liner plate at the top of the earth retaining wall. A method of assembling a liner plate, characterized in that the liner plate is extended by bolting to extend the soil retaining wall upward, and as the excavation progresses, the entire soil retaining wall is lowered. 4. The liner plate according to claim 1 or 2 is assembled in the vertical and horizontal directions by bolt connection to form a cylindrical structure, and a filling material is filled inside to form a liner plate cell dam body used in water. At this time, the liner plate assembling method is characterized in that the liner plate is further added to the upper part of the uppermost liner plate of the cylindrical structure on the water by bolting to extend the cylindrical structure upward and sequentially settle in the water. .