JP2913136B2 - Retaining wall construction method and connection structure using liner plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical body formed by connecting a plurality of arc-shaped liner plates in a circumferential direction and a vertical direction, and casting a concrete into the cylindrical body to form a retaining wall. The present invention relates to a retaining wall construction method using a liner plate to be constructed, and a connection structure for coupling liner plates, which is applicable to the retaining wall construction method and the like.

[0002]

2. Description of the Related Art When constructing a retaining wall using the above-described liner plate, the retaining wall is to be constructed adjacent to a retaining wall construction line.
To or respectively at a plurality of locations spaced, drilling a plurality of liner plates constitute a circumferential direction and the vertical direction in connection to the cylindrical body while, inside and Da設concrete cylindrical concrete cylinder Form pillars, then
To excavate the ground in front of the retaining wall of the retaining wall construction line
Or by forming concrete columns at intervals
If so, then add more slabs between the concrete columns
Build a retaining wall by providing To improve the beauty of the ground exposed part on the front side of the retaining wall, a decorative plate with an uneven surface is attached to the inner surface of the cylinder before casting concrete, and after the concrete has hardened, The removal of the liner plate and veneer from the side ground exposure is performed. As a result, an uneven surface is formed on the ground exposed portion in front of the retaining wall.

Conventionally, the connection between liner plates at the time of the above-mentioned retaining wall construction is a general method. However, as shown in FIG. 16, a hole formed in the overlapped flange portion 1a of the adjacent liner plate 1 is used. Flange connection bolt 3 for 1b
And screwing the nut 4 and tightening it. Then, the work of removing the liner plate 1 from the ground exposed portion on the front side of the retaining wall is performed by removing the liner plate 1 around the flange joining bolts 3 of the liner plate 1.
In this method, the liner plates 1 are disconnected from each other by fusing or sawing them from the outside to remove the joints, thereby disconnecting the liner plates 1 from each other.

[0004]

In the conventional method of connecting the liner plates 1 by simply joining the flange portions 1a with the flange connecting bolts 3 as described above, when the liner plate 1 is removed, the work of removing the liner plate 1 is performed. It takes a long time, and therefore, the construction cost is high, and there is a problem that it is not aesthetically pleasing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional disadvantages, and it is easy to remove a liner plate when constructing a retaining wall with a liner plate, and to obtain an aesthetically good retaining wall. It is an object of the present invention to provide a retaining wall construction method using a liner plate capable of performing the above-mentioned, and to provide a connection structure applicable to the retaining wall construction method and the like.

[0006]

Means for Solving the Problems According to the first aspect of the present invention, there is provided a method for constructing a retaining wall adjacent to a retaining wall construction line.
Excavation at multiple locations that are in contact with or spaced from each other
While the arcuate plurality of liner plates linked in the circumferential direction and the vertical direction constitute a cylindrical body, a cylindrical concrete columns by Da設concrete inside the cylindrical body
And then the ground on the front side of the retaining wall of the retaining wall construction line
By excavating or between concrete columns
When forming with a gap, add more concrete
In the retaining wall construction method using a liner plate for constructing a retaining wall by providing a slab between columns, the connection between the liner plates when forming the cylindrical body is performed by a flange engaging portion that engages with a flange portion of the liner plate. And a connecting device that has an external projection projecting outward from a hole formed in the wall surface of the liner plate and that can be disconnected by operating the external projection from the outside to form a cylindrical body. On the inner surface on the front side of the retaining wall of the cylindrical body, a decorative plate for forming an uneven pattern on the concrete surface is attached.
Next, concrete was poured into the cylinder with the decorative plate attached, and after the concrete had hardened,
After excavating the ground on the front side of the retaining wall of the line, the liner plates are disconnected from each other at the above-ground exposed portion on the front side of the retaining wall of the cylindrical body. It is performed by operating from the outside of the body, and then the detached liner plate is removed and the decorative panel is removed to expose the uneven concrete surface.

A second aspect of the present invention is a connection structure for connecting adjacent liner plates, wherein one end of one bending bolt bent so that the directions of both ends are orthogonal to each other is adjacent. The nut is screwed into the other end of the liner plate through the hole made in the overlapped flange portion of the liner plate, and the other end is made into the hole made in the wall surface of the liner plate. Is characterized by a bolt head or a nut screwed.

A third aspect of the present invention is a connecting structure for connecting adjacent liner plates, wherein a folded central portion of a connecting fitting having a U-shape and having claw portions at both ends is connected to a flange portion of an adjacent liner plate. The fittings are fitted into the recesses formed at the tip of the liner, and both ends of the connecting bracket are projected outward from the holes made in the wall of the liner plate;
The claw portions at both ends are elastically engaged with the edge portions of the holes, respectively.

According to a fourth aspect of the present invention, there is provided a connecting structure for connecting adjacent liner plates, wherein a hole larger than the head of the flange joining bolt is formed in the overlapped flange portion of the adjacent liner plates. With a tapered washer with a bolt on one side of the flange part and a simple tapered washer on the other side so that the tapered faces of both tapered washers are parallel to each other, pass the flange joint bolt through the hole and screw and tighten the nut. The bolt portion of the tapered washer with bolt is projected outward from a hole formed in a wall portion of the liner plate, and a nut is screwed into the tapered washer.

[0010]

According to the first aspect, when connecting the liner plate in the circumferential direction and the vertical direction to form a cylindrical body, the flange engaging portion of the connecting device engages with the flange portion of the liner plate to join the flange portion. The outer projection projects outward from the hole formed in the liner plate and is locked to the wall surface of the liner plate. A decorative panel is attached to the inner surface of the cylindrical body on the front side of the retaining wall, concrete is poured,
After the concrete has hardened, the liner plate is removed from the ground exposed part on the front side of the retaining wall of the cylindrical body. When the liner plate is removed, the outer projection of the connecting device is operated from the outside of the liner plate, and the flange connection is removed. The joining of the flange portion by the joining portion can be released. Thereby, the liner plate can be removed. When the veneer is also removed, a concrete surface with a veneer pattern can be obtained from the exposed surface above the retaining wall.

In the connecting structure according to the second aspect, the bending bolt, which is passed between the flange portion and the wall portion forming a right angle to each other and has the nut at the end portion tightened, applies a tightening force to the two flange portions. The two flanges are joined by this tightening force, and the liner plates are connected to each other.

In the connecting structure according to a third aspect of the present invention, the U-shaped connecting metal fittings are arranged so as to sandwich the overlapped flange portions of the adjacent liner plates, and the claw portions at both ends of the U-shape are formed on the adjacent liner plates. Adjacent liner plates are joined together so as not to separate from each other as they engage the edges of the holes respectively. When the U-shaped elastic connection fitting is opened or closed, the claws at both ends are disengaged from the edge of the hole in the wall, so that the connection fitting can be pushed inward and dropped from the liner plate. This gives
The connection between the liner plates is released.

According to the fourth aspect of the present invention, the flange joining bolt and the nut screwed thereto fasten and fix the overlapped flange portions of the adjacent liner plates with a tapered washer with a bolt and a simple taper washer interposed therebetween. On the other hand, the bolt portion of the tapered washer with bolt protrudes outward from a hole formed in the wall portion of the liner plate, and is fixed to the wall portion by tightening a nut screwed to the outer portion. To release the connection between the liner plates, loosen the nut that is screwed into the bolt of the tapered washer with bolts, and move the tapered washer with bolts by hitting the bolts, etc., and the taper washer moves and the flange is joined. Remove from bolt. Thus, the flange joining bolt loses the joining force to the overlapped flange portion, and the connection between the liner plates is released.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. The retaining wall to be constructed in this embodiment is a retaining wall in the case where one side of a flat land is excavated to make a lowland. FIG. 1 is a perspective view of a main part of a retaining wall construction method according to an embodiment of the present invention before concrete is poured, in which reference numeral 11 denotes an arc-shaped liner plate.
2 is a connecting device for connecting adjacent liner plates 11, 13 is a decorative plate made of, for example, styrene foam, for forming an uneven pattern on the concrete surface, 14 is a decorative plate.
Is a frame plate made of a steel plate for reinforcing the decorative plate 13 having no rigidity.

The construction procedure for constructing a retaining wall according to the method of the present invention will first be outlined with reference to FIGS. 2 to 7, and FIGS. 2 (a), 2 (b), and 3 (a), 3 (b) As shown in (1), first, on a retaining wall construction line on which a retaining wall is to be constructed, a plurality of liner plates 11 are connected in a circumferential direction and a vertical direction using a connecting device 12 while excavating to form a cylindrical body 16. Thus, a shaft using the cylindrical body 16 is obtained. That is, FIGS. 2A and 2B show a state in which the lowermost liner plate 11 of the cylindrical body 16 is assembled in a circular ring shape.
After digging the inside of the slab and sinking the liner plate 11, the next step of connecting the liner plate 11 to the next stage, digging the inside, and sinking it is repeated, and FIG.
The cylindrical body 16 as shown in FIGS.
6 to get the shaft. The procedure for connecting the liner plates 11 by the connecting device 12 will be described later. Then,
As shown in FIGS. 4A and 4B and FIG.
6, the retaining wall front side of the cylindrical body 16 (FIG. 4 (a),
The decorative plate 13 for forming a concavo-convex pattern on a concrete surface is attached to the inner surface (left side in (b) and the like). As described with reference to FIG. 1, the decorative plate 13 made of styrofoam has no rigidity.
4 to 7, the illustration of the frame plate 14 is omitted. Frame plate 14 if it is a rigid decorative board
There is no need for Although not shown, a ring-shaped reinforcing bar is disposed inside the cylindrical body 16 along the inner surface of the cylindrical body, so that the frame plate 14 and the decorative plate 13 may be supported by the reinforcing bar. Further, the lower end positions of the decorative plate 13 and the frame plate 14 may be up to a height position which becomes the exposed portion on the front side of the retaining wall of the cylindrical body 16. Next, concrete is poured into the cylindrical body 16. As shown in FIGS. 5A and 5B, after the concrete is hardened and the concrete columns 18 are obtained, the ground on the front side of the retaining wall is excavated. Next, Fig. 6 (a), (b)
As shown in the figure, the liner plate 11 is removed from the exposed portion on the front side of the retaining wall of the cylindrical body 16 and the decorative board 1 is removed.
Remove 3 The operation of removing the liner plate 11 will be described later. As a result, a concrete surface 18a having a concavo-convex pattern by the decorative plate 13 is obtained on the ground exposed portion on the front side of the retaining wall. Next, after the same concrete columns 18 as described above were constructed at intervals along the retaining wall construction line, as shown in FIGS. 7 (a), (b) and FIG.
An RC slab (reinforced concrete slab) 20 is arranged between the concrete columns 18. In addition, this RC slab 20
As shown in FIGS. 7 (a) and 7 (b), a concrete column 18 is provided with its ends fitted in grooves 21 (omitted in the description of the steps up to FIG. 6) formed on both side surfaces of the concrete column 18. It is a wall between the columns 18.

FIG. 9 shows the details of the connecting device 12 for connecting the liner plates 11 to each other. The connecting structure of the connecting device 12 adopts the connecting structure of the second aspect. As shown in FIG.
2 is a single bent bolt 22 bent in a quarter arc so that the directions of both ends are orthogonal to each other, and a nut screwed into one end 22a and the other end 22b of the other. 23 and 24 and flat washers 25 and 26. Then, the flange portion 11a of the liner plate 11
And a hole 11d in the wall portion 11c.

When connecting the adjacent liner plates 11 with this connecting device 12, the bending bolts 22
The other end 22b is projected outward from the hole 11d of the wall surface 11c, and the nut 23 is screwed. Then, the overlapping flange portions 1 of the adjacent liner plates 11
When one end 22a of the bending bolt 22 is passed through the hole 11b of 1a, and the nut 24 is screwed and tightened, the bending bolt 22 applies a tightening force to the two flanges 11a to join them together, thereby forming a liner plate. 11 are connected. As described above, the liner plate 11 is assembled at the time of assembly.
Connection work is done from inside. The one end 22a and the nut 24 of the flange joining bolt 22 constitute a flange engaging portion, and the other end 22b and the nut 23 constitute an outer projecting portion.

When the liner plate 11 is removed to expose the concrete surface on the front side of the retaining wall (step shown in FIG. 6), the outer nut 23 is loosened and removed, and the other end 22b of the bending bolt 22 is removed. Is pushed inward from the hole 11d, the bending bolt 22
From the hole 11b, and the joining of the flange portion 11a is released. In this manner, the connection between the liner plates 11 can be released from outside the liner plates 11.

The connection between the liner plates 11 can also be performed by a connecting device 12A shown in FIGS. The connecting structure of the connecting device 12A adopts the connecting structure of the third aspect. This coupling device 1
2A is composed of only a connection fitting 30 having a U-shape and having claw portions 30a at both ends. Then, a concave portion 11e is formed in the edge portion of the flange portion 11a of the liner plate 11, and a hole 11f is formed in the wall surface portion 11c of the liner plate 11.

When connecting the adjacent liner plates 11 with the connecting fittings 30, the folded central portions 30b of the connecting fittings 30 are fitted into the recesses 11e, and both ends are inserted into the holes 11f of the wall surface portion 11c. When it is projected outward, the U-shaped connecting fitting 30 is opened and then closed when it is passed through the hole 11f, and the claw portion 30a is elastically locked to the inner edge of the two holes 11f in the space direction. And it is stopped. Adjacent liner plates 11 are connected by this connection fitting 30. The folded central portion 30b of the connecting fitting 30 constitutes a flange engaging portion, and the claw portions 30a at both ends constitute an outer projecting portion.

In order to release the connection between the liner plates 11 by the connection fittings 30, the both ends of the connection fitting 30 are pushed right and left, and the claws 30a at both ends are opened from the edge of the hole 11f of the wall surface 11c. When the connection fitting 30 is removed and the connection fitting 30 is pushed into the inside of the liner plate 11, the connection fitting 30 drops off from the liner plate 11 and the liner plate 1 is removed.
The connection between one is released.

In the illustrated example, the claw portion 30a is formed inside the U-shape, and in the connected state, the connecting fitting 30 exerts an inward elastic force. The flange portions 11a are joined so as to be in close contact with each other, so that a gap is prevented, and good flange portion joining is performed. However, it is also possible to form the claws outside the U-shape. In this case, both ends are pushed into the hole 11f in a state where the U-shaped connecting fitting is closed, and after passing through the hole 11f, the claw portion is locked to the outer edge of the hole 11f so that the U-shape is opened. In this case, the U-shaped connection metal merely functions to prevent the adjacent liner plates 11 from separating.

The connection between the liner plates 11 can also be performed by a connecting device 12B shown in FIGS. The connecting structure of the connecting device 12B adopts the connecting structure of the fourth aspect. This coupling device 1
2B is a taper washer 31 having a U-shaped groove 31a.
Washer 33 with bolts having bolt portions 32
And a simple taper washer 34 having a U-shaped groove 34a.
A nut 36 to be screwed to the bolt portion 32 of the tapered washer 33 with a flange;
It comprises a flat washer 37 and a nut 38 screwed to the flange joining bolt 35. Then, a hole 11g larger than the head of the flange joining bolt 35 is made in the overlapped flange portion 11a of the adjacent liner plate 11, and a hole 11h is made in the wall surface portion 11c of the liner plate 11.

When connecting the adjacent liner plates 11 with this connecting device 12B, the bolts 32 of the tapered washer 33 with bolts are previously inserted into the holes 11 of the wall surface 11c.
and a flat washer 37 and a nut 36 are attached. At the position of the hole 11g of the flange portion 11a, the taper washer portion 31 of the tapered washer 33 with a bolt is provided on one surface of the flange portion 11a, and the simple taper washer 34 is provided on the other surface. Then, the flange connection bolt 35 is passed through the hole 11g, and the nut 38 is screwed and tightened. As a result, the flange portions 11a are firmly joined by the fastening force of the flange joining bolt 35. The flange joining bolt 35, the tapered washer portion 31 of the tapered washer 33 with a bolt, the tapered washer 34,
The nut 38 forms a flange engaging portion, and the bolt portion 32, the nut 36, and the flat washer 37 of the bolted tapered washer 33 form an outer surface protruding portion.

To release the connection between the liner plates 11 by the connecting device 12B, the nut 36 to be screwed to the bolt portion 32 of the tapered washer 33 with bolts is loosened, and the bolt portion 32 is moved to the left in FIG. In this case, the taper washer portion 31 is easily moved by the taper and comes off the flange joining bolt 35. Thereby, the flange joining bolt 35 loses the joining force to the overlapped flange portion 11a, and the connection between the liner plates 11 is released.

The retaining wall construction method of the present invention is not limited to the case where the retaining wall is constructed by excavating one side of the flat land as described above, but also the case where the retaining wall is constructed on an inclined surface and various other types. Applicable to retaining walls. Further, in the embodiment, the RC slab 20 is provided between the concrete pillars 18 constructed of the liner plate. However, it is naturally possible to form only the concrete pillars formed of the liner plate continuously to form the retaining wall. Further, the connection structure of the second, third, and fourth aspects is not limited to the case of the retaining wall construction method as described above, and is applicable to connection of liner plates in various cases.

[0027]

According to the method for constructing a retaining wall using a liner plate of the present invention, the liner plate can be removed by operating the outer projection of the connecting device from the outside. Compared with the method based on disconnection etc., it became remarkably easy and efficient, and the construction cost was reduced. Also, since no cutting is performed, the appearance is good.

According to the connection structure of the second, third and fourth aspects, the connection between the liner plates can be released by operating from outside the liner plate. Therefore, it is suitable for application to the above retaining wall construction method.

According to the connecting structure of the second aspect, since only bending bolts and nuts are required as connecting members, the structure for connecting the liner plates is very simple, and the cost can be reduced.

According to the third aspect, U is used as the connecting member.
Since only the connection metal fittings are required, the structure for connecting the liner plates is simpler and the cost can be reduced. In addition, the connection operation and the connection release operation between the liner plates using the U-shaped connection fitting are both very simple, and the work efficiency is improved.

According to the fourth aspect, since the overlapped flange portions are directly joined by bolts, firm joining can be performed.

[Brief description of the drawings]

FIG. 1 is a view for explaining an embodiment of a retaining wall construction method using a liner plate according to claim 1, wherein a liner plate is assembled to form a cylindrical body, and a cross-sectional view of a main part in a state where a decorative plate is attached to an inner surface thereof; It is.

FIGS. 2A and 2B show an initial stage of the construction in the retaining wall construction method of the first embodiment, wherein FIG. 2A is a plan view and FIG.

FIG. 3 shows a step following the step shown in FIG. 2 in the retaining wall construction method of the first embodiment, wherein FIG. 3A is a plan view and FIG. 3B is a sectional view.

FIG. 4 shows a step following the step of FIG. 3 in the retaining wall construction method of claim 1, wherein FIG. 4A is a plan view and FIG.

FIGS. 5A and 5B show a step subsequent to FIG. 4 in the construction of the retaining wall construction method according to claim 1; FIG. 5A is a plan view, and FIG.

6 (a) and 6 (b) show a step following the step shown in FIG. 5 of the construction in the retaining wall construction method of the first embodiment, wherein FIG. 6 (a) is a plan view and FIG.

FIG. 7 shows a construction completion stage following FIG. 6 of the construction in the retaining wall construction method of claim 1, wherein FIG.
FIG. 2B is a sectional view.

FIG. 8 is an overall perspective view of the retaining wall, similarly showing a completed state.

FIG. 9 is a sectional view showing an embodiment of the connection structure of the second embodiment.

FIG. 10 is a sectional view showing an embodiment of the connecting structure of the third embodiment.

11 is a sectional view taken along line AA of FIG.

FIG. 12 is a cross-sectional view showing one embodiment of the connection structure of claim 4;

FIG. 13 is a sectional view taken along line BB in FIG.

FIG. 14 is a perspective view of the tapered washer with a bolt in FIG. 12;

15A and 15B show a taper washer in FIG. 12, wherein FIG. 15A is a plan view and FIG. 15B is a cross-sectional view taken along the line CC in FIG.

FIG. 16 shows a conventional example, and is a cross-sectional view of a connection structure between liner plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Liner plate 11a Flange part 11b, 11d, 11f, 11g, 11h Hole 11c Wall part 11e Concave part 12, 12A, 12B Connection device 13 Decorative plate 14 Frame plate 16 Cylindrical body 20 RC slab 22 Bending bolt 22a One end (flange) Engagement part) 22b The other end part (outside projection part) 23 Nut 24 Nut (flange engagement part) 30 Connection fitting 30a Claw part (outside projection part) 30b Folded center part (flange engagement part) 31 Taper washer part ( Flange engagement part) 32 Bolt part (external projection part) 33 Tapered washer with bolt 34 Simple taper washer (flange engagement part) 35 Flange joining bolt (flange engagement part) 36 Nut (external projection part) 38 Nut (flange part) Joint)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 29/02 310 E02D 29/02 309

Claims (4)

(57) [Claims] (1) Next to a retaining wall construction line on which a retaining wall is to be constructed.
Excavation at multiple locations that are in contact with or spaced from each other
While the arcuate plurality of liner plates linked in the circumferential direction and the vertical direction constitute a cylindrical body, a cylindrical concrete columns by Da設concrete inside the cylindrical body
And then the ground on the front side of the retaining wall of the retaining wall construction line
By excavating or between concrete columns
When forming with a gap, add more concrete
In a retaining wall construction method using a liner plate for constructing a retaining wall by providing a slab between columns, the connection between the liner plates when forming the cylindrical body is performed by a flange engaging portion engaged with a flange portion of the liner plate. And an external projection projecting outward from a hole made in the wall surface of the liner plate. The external projection is operated from the outside by a coupling device which can be disconnected to form a cylindrical body. A decorative plate for forming an uneven pattern on the concrete surface is attached to the inner surface on the front side of the retaining wall of the cylinder, and then concrete is poured into the cylinder with the decorative plate attached, and after the concrete hardens,
And after excavating the ground in front of the retaining wall of the retaining wall construction line,
The liner plates are disconnected from each other at the ground exposed portion on the front side of the retaining wall of the cylindrical body, and the connection is released by operating the outer projection of the connecting device from outside the cylindrical body. A method for constructing a retaining wall using a liner plate, comprising removing a released liner plate and removing a decorative plate to expose a concrete surface having an uneven pattern. 2. A connection structure for connecting adjacent liner plates, wherein one end of one bending bolt bent so that the directions of both ends are orthogonal to each other is overlapped with the adjacent liner plates. Through the hole drilled in the flanged part, the other end through the hole drilled in the wall of the liner plate, a nut is screwed into the other end, and the one end is connected to the bolt head. Or a connection structure in which a nut is screwed. 3. A connecting structure for connecting adjacent liner plates, wherein a folded central portion of a connecting bracket having a U-shape and having claw portions at both ends is formed at a front end portion of a flange portion of an adjacent liner plate. And the both ends of the connecting fitting are projected outward from a hole formed in the wall surface of the liner plate, and the claws at both ends are elastically engaged with the edges of the hole, respectively. Connection structure characterized by that. 4. A connection structure for connecting adjacent liner plates, wherein a hole larger than the head of a flange joining bolt is formed in an overlapped flange portion of the adjacent liner plates, and one of the flange portions at the position of the hole is formed. A tapered washer with a bolt is inserted on the other surface, and a simple taper washer is interposed on the other surface so that the tapered surfaces of both tapered washers are parallel to each other. A connection structure in which a bolt portion of a washer is projected outward from a hole formed in a wall portion of a liner plate, and a nut is screwed into the connection portion.