JPH11166388A - Fixing device of pit earth retaining wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent generation of a gap in a fitting part of a liner plate so as to improve water stop performance by devising installation of a fixing device in the fixing device for preventing sinking caused by weight of the connected liner plates in connecting the liner plates to each other to form an earth retaining wall of a pit. SOLUTION: This fixing device 21 includes a clamping plate 31 used for fitting to a liner plate 5, a connecting material 33 where the clamping plate 31 is connected to one end thereof, and a horizontal plate 35 connected to the other end of the connecting material 33. The vertical dimension of the clamping plate 31 is made substantially equal to the vertical dimension of a joint plate 25 which forms the liner plate 5 and is used for circumferential connection. Since even the diameter of the pit is different, the vertical dimension, that is, the height of a connecting plate 41 is not changed, the same fixing device 21 can be used for all liner plates 5, and no gap is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for fixing a liner plate constituting a retaining wall of a shaft to ground.

[0002]

2. Description of the Related Art As shown in FIG. 6, a liner plate 5 is often used for a retaining wall 3 of a shaft 1 in the related art. The liner plate 5 is connected in a plurality of stages in the circumferential direction of the shaft 1, and further connected in the axial direction of the shaft 1, and covers the entire inner periphery of the shaft 1 to form the retaining wall 3. Further, excavation is further recommended for the shaft 1 in which the retaining wall 3 is formed, and a liner plate 5 is further connected to the excavated portion.

[0003] In order to support the weight of the liner plate 5 connected to the depth of the shaft 1, the upper edge of the liner plate 5 is provided with a support beam 7 on a cross beam and a surface 11 of the ground 9.
Place on. Then, the entire connected liner plate 5 is supported by these support beams 7 to prevent sinking. The support beam 7 is made of, for example, an H-shaped steel. However, since the H-shaped steel has a large weight and a long length, it is difficult to assemble the crossbeam with human power and requires heavy equipment.

In order to solve this problem, there has been proposed a compact device for fixing the retaining wall 3 composed of a liner plate to the surface of the ground with only human power (Japanese Patent Laid-Open No. 8-31).
2284). This fixing device 12, as shown in FIG.
The top plate 15 attached to the upper flange 13 of the liner plate 5 and the ground plate 1 attached to the lower flange 16
7 are connected by legs 19.

The top plate 15 and the ground plate 17 are each
8 attached to each flange 13, 16. Each flange 16 is provided with a bolt hole for connecting the liner plates 5 to each other in the axial direction of the shaft 1, so that a bolt 18 is attached to the bolt hole.

[0006]

However, according to the fixing device 12 described above, when the fixing device 12 is attached to the topmost liner plate 5 of the shaft 1,
In the case where 7 is attached to the second-stage liner plate 5, the top plate 15 and the ground plate 17 are sandwiched between the vertically adjacent liner plates 5, respectively.

The top plate 15 and the ground plate 17 are not provided on the entire circumferential direction of the retaining wall 3 (only three positions are provided according to FIG. 7). In other words, when there is a gap between the lower flange 16 of the upper liner plate 5 and the upper flange 13 of the lower liner plate 5 and the surrounding ground contains a large amount of water, water blocking becomes a problem. Would.

According to FIG. 7, the top plate 15 is formed in an arc shape so as not to protrude into the retaining wall 3, but the diameter of the liner plate 5 which can be accommodated by this arc size is limited. Therefore, it is necessary to prepare a plurality of fixing devices 12 in advance in order to correspond to the liner plates 5 of all kinds of dimensions.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and not only can the mounting work be performed by human power, but also it is possible to form a liner plate having a small watertightness with a small gap and excellent water stopping performance. It is an object to provide a versatile fixing device.

[0010]

Means for Solving the Problems To achieve the above object, a first aspect of the present invention is to fix a liner plate which constitutes a shaft shaft retaining wall and is connected to the circumferential direction and the axial direction of the shaft, to the ground. In the fixing device, a sandwiching plate having a liner plate and sandwiched between joint plates used for circumferential connection of the liner plate and having substantially the same vertical dimension as the joint plate, one end of which is connected to the sandwiching plate and outside the shaft. A pit shaft, comprising: a connecting member located at the position; a horizontal plate connected to the other end of the connecting member and in contact with the ground substantially horizontally; and means for fastening the adjacent joint plates and the clamping plate. It is a wall fixing device.

A second aspect of the present invention is a vertical shaft retaining wall fixing device, characterized in that the holding plate has a bolt hole and the means for fastening is a bolt nut.

Further, in the third invention, the holding plate, the connecting member, and the horizontal plate are connected by welding, and the connecting member comes into contact with the outer periphery of the liner plate to swing in the circumferential direction of the shaft of the shaft. The horizontal plate is a corrugated plate having a corrugated cross-section formed in the radial direction of the shaft, and is a fixing device for retaining walls.

Further, the fourth invention is characterized in that the horizontal plate is connected to the connecting member by bolts and nuts, and a mechanism for adjusting the vertical position of the horizontal plate by turning the bolt or nut is provided. It is a device for fixing the shaft retaining wall.

[0014]

FIG. 1 shows a fixing device according to a first embodiment of the present invention. The figure shows a state in which the fixing device 21 is attached to the liner plate 5.

First, the liner plate 5 is made of a corrugated steel plate 23 having a wave-shaped cross section that is continuous in the axial direction of the shaft, that is, in the vertical direction. The upper and lower ends of the corrugated steel plate 23 form an upper flange 13 and a lower flange 16. Joint plates 25 are welded to the left and right of the corrugated steel plate 23 and are used to connect the liner plate 5 in the circumferential direction. Bolt holes 27 for connection are formed in the upper flange 13, the lower flange 16, and the joint plate 25. If the diameter of the shaft is different, the radius of curvature of the entire corrugated steel plate 23 that is curved is different, but the upper and lower dimensions of the joint plate 25 remain the same.

If reinforcement is required, an H-section steel 29 is provided between the liner plates 5 connected vertically as shown in FIG. The position where the H-shaped steel 29 is provided is generally every two steps or every three steps of the liner plate 5.

The fixing device 21 of this embodiment includes a holding plate 31 held between the joint plates 25, a connecting member 33 having one end connected to the holding plate 31, and a connecting member 33 connected to the other end of the connecting member 33. And a horizontal plate 35 to be formed.

The holding plate 31 has substantially the same vertical dimension (length), vertical dimension (width), and wall thickness as the joint plate 25. The thickness t is, for example, 3.2 mm.
It is. A bolt hole 37 is formed in the holding plate 31 at a position communicating with the bolt hole 27 of the joint plate 25.

The connecting member 33 has a T-shaped planar shape.
The upper side of the T-shape is the run-out preventing member 39, which has substantially the same curvature as the curvature of the corrugated steel plate 23 of the liner plate 5. The anti-sway member 39 is welded to the holding plate 31, and a connection plate 41 is further welded to the anti-sway member 39.

The connection plate 41 is located outside the liner plate 5 and has a substantially right-angled triangular shape. One side forming a right angle is welded to the run-out preventing member 39 and the other side is welded to the horizontal plate 35. . Then, an L-shaped steel 43 is welded to the lower end of the connection plate 41 from both sides thereof along a welded portion with the horizontal plate 35 for reinforcement.

The vertical dimension of the anti-vibration member 39 is
The upper end of the shake preventing member 39 is located at a position lower by L1 than the upper end of the holding plate 31, and the lower end is located at a position higher by L2 than the lower end of the holding plate 31. This L
Due to the dimensions 1 and L2, even if the H-shaped steel 29 for reinforcing the liner plate 5 is provided as shown in FIG.
1 so that it can be used.

In FIG. 2, a fixing device 21 is provided above an H-shaped steel 29.
Is shown by a solid line, and a state provided below is shown by a chain line.

The horizontal plate 35 has a corrugated cross section formed in the radial direction of the shaft. By having a corrugated cross section, friction in the radial direction with respect to the ground can be increased. The angle θ of the horizontal plate 35 with respect to the vertical line 45 is 90
It is slightly larger than the degree, for example, 93 degrees. Thereby, even when the horizontal plate 35 receives an upward force from the ground, it is possible to approximately cancel the deformation of the horizontal plate 35 and the displacement due to the looseness of the bolts and the bolt holes.

Further, as can be seen from FIG. 1, the horizontal plate 35 has an upwardly convex curved shape in a plane orthogonal to the direction in which the waveforms are continuous. Due to this curvature, when it receives an upward force from the ground, it is deformed to a horizontal state.

An arc-shaped notch 4 is provided below the connection plate 41.
7 are formed. With this arc shape, cracks and the like can be less likely to occur in the connection plate 41 when a force from the ground is applied to the connection plate.

(Operation / Effect of Embodiment) Four fixing fittings 21 having this embodiment are attached, for example, in the circumferential direction of a shaft. At the time of attachment, before the joint plates 25 of the liner plates 5 adjacent to each other in the circumferential direction are connected at the attachment position, the clamping plates 3 are sandwiched between the joint plates 25.
1 and the bolt hole 27 of the joint plate 25 and the holding plate 31
The bolt holes 37 are communicated with each other. Connected bolt holes 27,
Bolts 49 are passed from the inside of the liner plate 5 to the nuts 37 and 27, and a nut 51 is screwed into the nuts from the opposite side.

At this time, the dimensions of the joint plate 25 and the holding plate 31 are substantially the same, so that there is no gap between the joint plate 25 and the holding plate 31. The uppermost ring-shaped retaining wall formed by the uppermost liner plate 5 to which the four fixing devices 21 are attached has a larger circumferential dimension than the retaining wall formed by the other liner plates 5. Therefore, the size in the radial direction also becomes large, and specifically, it protrudes outward by about 2 mm as compared with other liner plates.

The upper and lower flanges 13 and 16 correspond to the protrusion.
Of the bolt hole 27 of FIG. However, the play of the bolt hole 27 is usually about 5 mm, and this deviation is sufficiently absorbed by the play.

Further, according to the above embodiment, there is no possibility that a part of the fixing device 21 protrudes inside the retaining wall.

When the liner plate 5 is buried in the ground as it is and disposable, the fixing device 21 can be disposable as it is. When the bolts of the liner plate 5 are removed and taken out of the shaft and reused, the bolts 49 can be similarly removed for reuse.

Further, each fixing device 21 can be constituted by the same weight as the weight of the liner plate 5,
The device 21 can be attached manually, and heavy equipment and the like become unnecessary.

According to an actual experiment,
It was confirmed that the labor required for mounting the device 21 was almost one half of the labor required for mounting one liner plate.

In addition, there is no need to modify the liner plate 5 in order to mount the device 21, and the conventional liner plate 5 can be used as it is.

Further, since the horizontal plate 35 has a corrugated cross section, it can be made light and rigid. Also, horizontal plate 3
By bending 5, the strength of the horizontal plate 35 itself can be increased.

(Other Embodiments) In the above embodiments, the anti-vibration member 39 arranged in the circumferential direction is welded to the holding plate 31, and the connecting plate 41 is attached to the anti-vibration member 39.
Was welded, but in another embodiment, for example, as shown in FIG. 3, a part of the holding plate 31 is extended outside the shaft, and the connecting plate 33 is overlapped on the extended portion. By directly welding and overlapping, the portion most susceptible to damage by the force from the ground can be made into a double plate structure.

The run-out preventing member 39 can be provided by welding a plate having an L-shaped cross section to the connecting plate 41 or the holding plate 31.

In the above embodiment, the L-shaped steel 43 is provided for reinforcement along the welding line between the connection plate 41 and the horizontal plate 35 located vertically.
In another embodiment, instead of the L-shaped steel, a triangular member 53 as shown in FIG. 3 may be welded and attached in a state orthogonal to the connection plate 41 and the horizontal plate 35 for reinforcement.

In the above embodiment, the horizontal plate 35 is fixed to the connecting member 33. In another embodiment, for example, as shown in FIG. Can be moved up and down, so that the vertical position can be adjusted.

That is, the L-shaped steel 43 provided on both sides of the connection plate 41 is provided with two guide holes 55, respectively, and the lower end of the guide rod 57 slidably passed through the guide holes 55. It is welded to the horizontal plate 35. A bolt hole 59 is formed at the center of the two guide holes 55, and after a nut 63 is screwed into an upper portion of a bolt 61 that is welded through the back side of the horizontal plate 35 and protrudes upward, the bolt hole 59 is formed. , And another nut 65 is screwed.

To move the horizontal plate 35 upward, if the lower nut 63 is loosened downward, the horizontal plate moves upward due to the weight of the device 21 and the liner plate 5 due to the upward force from the ground. Thereafter, the upper nut 65 is lowered and the L-shaped steel 43 is sandwiched between the lower nut 63 and the lower nut 63.

Conversely, when the horizontal plate 35 is to be moved downward, the upper nut 65 is loosened and moved upward, and the device 21 and the liner plate 5 are lifted upward by some method. Then, the horizontal plate 35 moves downward by its own weight. Thereafter, the lower nut 63 is rotated and moved upward, and the L-shaped steel 43 is sandwiched between the lower nut 63 and the upper nut 65. As described above, an arbitrary vertical position can be adjusted.

In this manner, the vertical position of the horizontal plate 35 can be freely adjusted by each of the four fixing devices 21 provided at four positions in the circumferential direction, and the vertical position of the connected liner plate 5 can be adjusted. The inclination can be corrected.

Further, in the embodiment shown in FIG.
The adjustment of the vertical position of 5 requires the four nuts 63 and 65 to be moved up and down by two bolts 61. In another embodiment, for example, as shown in FIG. Can be adjusted.

That is, the upward bolt 67 is attached to the horizontal plate 69 by welding.
The axis of 7 is not perpendicular to the plane of the horizontal plate 69 but is slightly inclined. At the lower end of the connection plate 41, a horizontal mounting plate 71 supported by the same L-shaped steel 43 as described above is provided.

A bolt hole 73 formed at the center of the mounting plate 71 and a nut 75 concentrically welded to the bolt hole 73 on the upper side are both provided vertically to the mounting plate 71. The bolt 67 is screwed into the bolt hole 73 and the nut 75.

With the above arrangement, when the horizontal plate 69 is rotated by using the handle 77 provided on the horizontal plate 69,
The height of the tip of the horizontal plate 69 changes, that is, the vertical position can be adjusted. Adjustment of the vertical position by this rotation is only 79 in the figure, but if a larger vertical position adjustment is required, the horizontal plate 69 may be rotated several times to adjust the vertical position of the horizontal plate 69 itself. good.

In the above embodiment, the fixing device 21 is attached to the uppermost liner plate 5. However, in other embodiments, the liner plate of another stage such as the second stage or the third stage is mounted. It is also possible to attach to the plate 5. For example, when attaching to the second-stage liner plate 5, as shown in FIG. 1, the surrounding ground is excavated until the second-stage liner plate is exposed, and the horizontal plate 35 is brought into contact with the excavated surface 79. I do.

In the above embodiment, the connection between the holding plate 31 and the connecting member 33 is made by welding, but in other embodiments, the connection can be made with a bolt and nut. That is, as shown in FIG. 3, when a part of the holding plate 31 and a part of the connecting plate 41 overlap, a bolt hole is communicated with the overlapping part and a plurality of bolt nuts (not shown) are used. It is possible to firmly connect the two 31, 31.

[0049]

As described above, according to the first, second, third or fourth aspect of the present invention, when the fixing device is mounted, the holding plate constituting the fixing device is connected to the liner plate in the circumferential direction. It is sandwiched between the joint plates used in the above, and is attached by a penetrating bolt. However, the clamping plate having substantially the same vertical dimension as the joint plate has no gap, and is excellent in water stoppage. Even if the diameter of the shaft is different and the size of the liner plate is different, the joint plate constituting the liner plate has the same vertical dimension, so that the same fixing device can be used to attach all liner plates with different diameters. It becomes possible.

According to the third aspect of the present invention, the vibration preventing plate prevents the apparatus from oscillating in the circumferential direction of the shaft, and the corrugated cross section of the horizontal plate increases friction in the shaft shaft radial direction with the ground. Therefore, horizontal displacement can be effectively prevented. Further, according to the fourth invention, it is easy to prevent the inclination of the retaining wall in the vertical plane by adjusting the vertical position of the horizontal plate.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a fixing device according to a first embodiment of the present invention is attached to a liner plate.

FIG. 2 is a longitudinal sectional side view showing a relationship between the H-shaped steel and a fixing device when an H-shaped steel for reinforcement is provided on the liner plate of FIG. 1;

FIG. 3 is an overall perspective view of a fixing device according to another embodiment.

4A and 4B show a horizontal plate portion of a fixing device according to still another embodiment, wherein FIG. 4A is a perspective view of the entire horizontal plate, and FIG.

5A and 5B show a horizontal plate portion of a fixing device according to still another embodiment, wherein FIG. 5A is a perspective view of the entire horizontal plate, and FIG. 5B is a side view showing a main part of FIG. is there.

FIG. 6 is an overall perspective view showing a first conventional example.

FIG. 7 is an overall perspective view showing a second conventional example.

[Explanation of symbols]

5 Liner Plate 21 Fixing Device 23 Corrugated Steel 25 Joint Plate 27 Bolt Hole 31 Holding Plate 33 Connecting Material 35 Horizontal Plate 37 Bolt Hole 39 Anti-Shake Material 41 Connection Plate 49 Bolt 55 Guide Hole 57 Guide Rod 61, 67 Bolt 63, 65, 75 Nut 77 Handle

Claims (4)

[Claims] 1. A fixing device for fixing a liner plate, which constitutes a shaft shaft retaining wall and is connected in a circumferential direction and an axial direction of a shaft, to a ground, is used for forming a liner plate and connecting the liner plate in a circumferential direction. A sandwiching plate sandwiched between the joint plates and having substantially the same vertical dimension as the joint plate, a connecting member having one end connected to the sandwiching plate and located outside the shaft, and being connected to the other end of the connecting material and substantially horizontal to the ground And a means for fastening the adjacent joint plate and the holding plate to each other. 2. The shaft fixing device according to claim 1, wherein said holding plate has a bolt hole, and said fastening means is a bolt nut. 3. The connection between the holding plate, the connecting member, and the horizontal plate is performed by welding, and the connecting member is in contact with an outer periphery of the liner plate to prevent the shaft from oscillating in the vertical direction of the apparatus. 3. The vertical shaft retaining wall fixing device according to claim 1, wherein an anti-sway member is provided, and the horizontal plate is a corrugated plate having a corrugated cross section formed in a radial direction of the shaft. 4. 4. The horizontal plate is connected to the connecting member by bolts and nuts, and a mechanism is provided for adjusting the vertical position of the horizontal plate by turning a bolt or a nut. The fixing device of the shaft shaft retaining wall according to the above.