JP2002275906A - Separation type bearing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unify two members pushing a wedge type structure into a central panel-point section when the two members for a separation type bearing plate are assembled by crossing and fitting at a center, and to obtain uniform subgrade reaction even at the end section of the bearing plate by adjusting pushing-in force. SOLUTION: The bearing plate consists of lower beams 3 to which lower- beam panel-point section bottom plates 13 having lower beam holes at central sections and leg-section bottom plates 9, which are arranged linearly on both sides of the bottom plates 13, holding the bottom plates 13 and on which box- shaped leg sections 7 in which diaphragms 23 are installed obliquely on the central sides are placed, are formed integrally, upper beams 5 to which upper- beam panel-point section bottom plates having upper beam holes at central sections, and the leg-section bottom plates 9, which are arranged linearly on both sides of the upper-beam panel-point section bottom plates, holding the bottom plates and on which the box-shaped leg sections 7 in which the diaphragms 23 are mounted on the central sides are plated are formed integrally, the central panel-point section 12 and a central compression member 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope stabilizing anchor construction method for preventing landslides and landslides on slopes such as mountain slopes, and more particularly, to a support plate fastened to an earth anchor buried in a slope. About.

[0002]

2. Description of the Related Art When a mountain surface is steep, a slope may collapse due to rainfall and landslide may occur. When constructing a road in a mountainous area, as shown in FIG.
Cut the mountain surface 103 above. Therefore, steep slope 1
05 is formed. In order to prevent the collapse of this slope, anchor work will be performed. For anchor work, drive the ground anchor 107 into the ground, attach the supporting plate 109 to the ground anchor 107, transmit the anchor load to the ground,
It controls landslides.

In this anchoring method, as shown in FIG. 16 (B), the earth anchor 107 is driven to be shifted upward by an angle α with respect to an axial direction perpendicular to the slope 105. Angle α
Is, for example, 0 to 30 degrees. The angle α is determined for each individual construction site in consideration of economy, from the relationship between the angle of the slope 105 and the angle of the slip surface. The driven earth anchor 107 passes through the hole 111 at the center of the support plate 109, and the slope 105
The supporting plate 109 is fastened to the portion protruding from the supporting member using a fastener 117. At the time of fastening, for example, 120
A tension of tf is applied.

As shown in FIG. 17, the conventional support plate has a cross-shaped so-called cross type with four arms 113 (FIG. 17A), and the four ends of the cross shape are straight lines. Semi-square type with a diamond shape (Fig. (B)) or a square type with a cross-shaped tip located at the center of each side of the square (Fig. (C)) )and so on. The cross-shaped portion has a certain thickness (that is, a vertical dimension) so as to withstand a large earth pressure, but an auxiliary plate 115 for supporting the earth pressure is also provided between the four arms of the cross ( Figures (B) and (C)).

[0005]

Generally, the anchoring method requires a large construction cost and a long construction period. Therefore, it is better to increase the intervals between the supporting plates and to reduce the number of earth anchors as much as possible. Specifically, the planar shape of the support plate 109 may be increased, but there is a restriction in transportation to the construction site. Further, for example, in the production of a steel bearing plate, a wide space is required for a painting operation and a reversing operation for welding a back surface, and a painting device and a reversing device also need to be increased in size. Also,
Large storage space is required.

[0006] As a countermeasure, a separation-type support plate is formed by assembling two members in a cross shape on site to form a support plate. In the case of an integral support plate, if one side exceeds 3.0 m, transportation is performed. The problem of being unable to do so could be solved. Generally, a separation type supporting plate is assembled by cross-fitting two members at the center (hereinafter referred to as the central point), but the fitting part of each member is determined by the manufacturing accuracy and the assembly time (at the time of positioning). There is a gap due to the extra room.

If there is a gap at the central point of the support plate, the anchor is fastened to the anchor to give a bending moment. That is, it does not effectively work as a pressure plate until the gap is eliminated. The displacement amount until the gap disappears is, for example, on the order of about 10 mm, and there is no problem when the installation ground is relatively soft. However, in the case of a bedrock or hard ground close to the bedrock, displacement cannot be given until there is no gap, and the bed may not function as a bearing plate.

This problem can be solved by filling the gap with concrete, mortar, resin-based adhesive or the like, or by driving a thin steel plate. However, since the number of working steps increases, a supporting plate that does not require such measures has been desired.
Further, rainwater easily accumulates in gaps between members, and improvement has been desired from the viewpoint of corrosion prevention.

Further, one of the problems is that the ground reaction force of the surface in contact with the supporting plate is not uniform. The length of one side is 2-3m
In the cross-shaped bearing plate, the ground reaction force generated in the supporting plate is not constant when the central point is pulled by the anchor, and only the central portion is often large. For this reason, the ground reaction force is small at the end of the support plate, and the effect of suppressing the ground is small.

FIG. 5 (a) shows a schematic cross-sectional view of a conventional supporting plate, and the distribution of displacement and ground reaction force. The displacement is not uniform due to factors such as the loading point (P) being one point at the center and the supporting plate being bent. The displacement is largest at the center of the loading point (P), becomes smaller toward the end, and has a distribution such that it rises from the ground surface at the end.

On the other hand, since the ground reaction force is considered to be substantially proportional to this displacement, the distribution is such that the central portion becomes larger and becomes smaller toward the edge, similarly to the distribution of the displacement. Therefore, the function of suppressing the slope by using the support plate may be insufficient at the end. In this case, the effect of suppressing the ground may not be sufficient at the ends of the legs, and therefore an improvement particularly in the case of preventing loosening of the slope surface soil has been desired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to increase the planar shape of the support plate and to cope with restrictions on transportation, and to use two separate support plates. When assembling by cross-fitting the members at the center (hereinafter referred to as the central score), insert a wedge-shaped structure into the central score and apply a pushing force with a jack or the like at the time of on-site assembly, or anchor. The purpose is to push the wedge-shaped structure into the central grid point by using the tensile tension of, and to integrate the two members.

Further, when the two members of the separation type support plate are cross-fitted at the central point and the wedge-shaped structure is inserted into the central point and assembled, the wedge-shaped structure is pushed in. Adjust the force and push the leg down until it deforms downward.When installed on a slope, sufficient ground reaction occurs at the end of the support plate, and a substantially uniform ground reaction is obtained over the entire contact surface. The purpose is to be able to be.

[0014]

According to a first aspect of the present invention, there is provided a separation-type support plate comprising the following members. (a) Lower beam girder bottom plate (13) with lower beam hole (15) in the center
And a box-shaped leg (7), which is linearly arranged on both sides of this and has a centrally mounted partition (23) inclined thereto
A lower beam (3) integrally formed with the leg bottom plate (9) on which the
(b) Upper beam girder bottom plate (14) with upper beam hole (16) in the center
And a leg bottom plate (9) on which a box-shaped leg (7) with a partition plate (23) attached to the center side is placed, which is linearly arranged on both sides of this and sandwiches it. The formed upper beam (5), (c) the lower beam girder bottom plate (13) and the upper beam girder bottom plate (14), the upper beam (5) and the lower girder (3) cross each other. When combined as described above, the partition (23) of the lower beam (3) and the partition (23) of the upper beam (5)
(D) inserted into the central score portion (12), the lower beam hole (15) and the upper beam hole (1).
6) and a central compression member (33) for fixing an earth anchor (107) passing therethrough.

According to a second aspect of the present invention, there is provided a separation type support plate comprising the following members. (a) Lower beam girder bottom plate (13) with lower beam hole (15) in the center
And a box-shaped reinforced concrete or prestressed concrete leg with a partition plate (23) attached to the center inclining, which is linearly arranged on both sides of this.
(51) and the lower beam (3) integrally formed, (b) an upper beam girder bottom plate (14) having an upper beam hole (16) in the center, and straight lines on both sides of this. Upper beam integrally formed with a box-shaped reinforced concrete or prestressed concrete leg (51) attached to the center side with a partition plate (23)
(5) and (c) the lower beam girder bottom plate (13) and the upper beam girder bottom plate (14) were combined such that the upper beam (5) and the lower girder (3) were perpendicular to each other. At this time, a central score (12) formed between the partition (23) of the lower beam (3) and the partition (23) of the upper beam (5).
(D) the lower beam hole, which is inserted in the central score (12),
(15) and the earth anchor (10) passing through the upper beam hole (16).
Central compression member (33) for fixing 7).

According to a third aspect of the present invention, the shape of the lower beam girder bottom plate (13) and the upper girder girder bottom plate (14) is directed to one of the vertical and horizontal axes passing through the center of the circle. And an oval shape in which a crescent portion is cut from both ends.

In a fourth aspect of the present invention, the central score (1
The shape of 2) is a separation-type supporting plate, wherein the shape is any one selected from a truncated cone shape, a truncated quadrangular pyramid shape, and a truncated polygonal shape.

In a fifth aspect of the present invention, the central score (1
2) is the lower beam point bottom plate (13) and the upper beam point bottom plate (14)
Instead, two pairs of legs (5) of the lower beam (3) and two pairs of legs (5) of the upper beam (5) are connected using a PC steel wire, and the lower beam (3) and the upper beam (3) are connected. Beam
(5) A separation-type support plate characterized by being formed by combining at right angles with each other.

According to a sixth aspect of the present invention, the central compression member
(33) is provided with a cylindrical hollow above the central compression member hole (35) in the lower part of the center, and anchors so as to cover the upper part of the hollow cylinder.
A ball seat (27) with an opening (29) for adjusting the installation angle of (107), or a central compression member
(35) A separation-type support plate characterized by having only (35).

According to a seventh aspect of the present invention, the center compression member is provided.
(33) is a separation-type support plate characterized in that a serrated surface (43) is provided on a surface where the central compression member (33) and each partition plate (23) are in contact with each other.

According to an eighth aspect of the present invention, the center compression member is provided.
(33) is a separation-type supporting plate characterized by being manufactured by casting or welding using iron or steel.

According to a ninth aspect of the present invention, the center compression member is provided.
The height of (33) is such that the bottom of the central compression member (33) is
(14) A separation-type supporting plate is provided so as not to reach (14).

According to a tenth aspect of the present invention, the central compression member (33) is a wedge (4
This is a separation-type support plate, which is inserted into the center of a cylindrical wedge-shaped pedestal (45) obtained by combining the above-mentioned 6).

According to an eleventh aspect of the present invention, the central compressing member (33) has a wedge (a hollow frustoconical member divided into four parts) inside a circular partition (25) provided vertically. 46. A separation-type support plate, which is inserted into the center of a cylindrical wedge-shaped pedestal (45) obtained by combining (46).

According to a twelfth aspect of the present invention, the central compression member (33) is provided inside a circular partition plate (25) provided with a slope.
A hollow frustoconical member with an outer peripheral surface with almost the same gradient
Cylindrical wedge-shaped pedestal combining four wedges (46)
(45) A separation-type support plate, which is inserted in the center of (45).

According to a thirteenth aspect of the present invention, the upper beam (3) and the lower beam (5) are combined in a cross shape at the central point (12), and after assembly, a wedge-shaped structure is provided at the central point. After loading, a pushing force is applied with a jack or the like at the time of on-site assembly, or the wedge-shaped structure is pushed into the central grid portion using the tensile tension of the anchor, and the two members are integrated, and the ground anchor (107 The present invention provides a method for assembling a separation-type support plate, which comprises obtaining a support plate (1) for fixing the support plate.

According to a fourteenth aspect of the present invention, there is provided a separation type support plate.
When the two members are cross-fitted at the central point and the wedge-shaped structure is inserted into the central point and assembled, the pushing force of the wedge-shaped structure is adjusted, and the legs are on the lower side. 13. A method for assembling a separation-type supporting plate according to claim 12, wherein the supporting plate (1) for fixing the earth anchor (107) by pushing the pressing member until it is deformed is obtained.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention is shown in FIGS.
As shown in FIG. As shown in FIG. 1, the support plate 1 includes a lower beam 3 and an upper beam 5.
And the central compression member 33, and has a cross shape. FIG. 1A shows the combination of the lower beam 3 and the upper beam 5 and the central compression member 33 separately.
Fig. 1 (b) shows the central point formed by combining the lower beam 3 and the upper beam 5.
FIG. 4 is a schematic plan view of a support plate 1 in which a central compression member 33 is inserted into 12;

The lower beam 3 and the upper beam 5 have two pairs of legs 7, 2 respectively.
Pairs of leg bottom plate 9, two pairs of diaphragm plates 23 and one pair of lower beam girder bottom plate 1
It is composed of three. A lower beam hole 15 is formed substantially at the center of the lower beam junction bottom plate 13, and an upper beam hole 16 is formed substantially at the center of the upper beam junction bottom plate 14. The lower beam girder bottom plate 13 and the upper beam girder bottom plate 14 are fitted at right angles, and the central girder 12 surrounded by the partition 23 of the lower girder 3 and the partition 23 of the upper girder 5 is formed. Form.

For the lower beam 3, use the schematic diagram of FIG.
This will be described with reference to the schematic diagram of FIG. (A) of each figure is a plan view, and (b) is a front view. Both the lower beam 3 and the upper beam 5 are manufactured by welding using, for example, a steel plate. Leg bottom plate
9 has a box-shaped leg 7 with a partition plate 11 attached to one end.
Are joined. The lower beam 3 and the upper beam 5 have a lower beam point bottom plate 13 between two pairs of leg bottom plates 9 of the same shape on which the legs 7 are mounted.
It is made integrally by sandwiching the upper beam junction bottom plate 14 by, for example, welding.

The cross-sectional shape of the leg portion 7 is trapezoidal, and the width of the upper side and the lower side of the trapezoid becomes shorter as going outward from the surface in contact with the partition plate 23, and the height becomes lower. Support plate 1
Sufficient strength (bending rigidity) against bending moment due to ground reaction force acting as anchor reaction force after installing on a slope
The cross-sectional dimensions of the leg 7 are determined so as to provide
Since this bending moment is large near the center, the cross section is designed to gradually decrease toward the end. The legs 7 of the lower beam 3 and the upper beam 5 have a trapezoidal cross-sectional shape, so that they can be press-processed, and the processed legs 7 can be stacked and stored.

In order to reduce the ground reaction force to an appropriate level, the width of the leg bottom plate 9 around the leg 7 may be increased.

When the lower beam 3 and the upper beam 5 are combined, the partition plate 23 is inclined so that the cross section becomes smaller at a constant rate toward the lower side of the central score 12 so that the end of the leg 7 is Attached to. In this example, since the mounting width of the leg 7 is larger than one side of the central graded portion, the partition plate has a folding plate projecting in a 45-degree direction.
Although 23 is provided, one without the folded plate may be used.
The partition plate 23 is manufactured so that when a bending moment due to the ground reaction force acts on the support plate 1, a compressive force due to the bending moment can be transmitted to the central compression member (33). Also,
The partition plate 23 of the lower beam 3 and the partition plate 23 of the upper beam 5 are manufactured so that the upper surface level is substantially the same in the fitted state.

The central score 12 is formed by a lower beam score bottom plate 13 and a partition plate.
23 is a space formed by combining the lower beam 3 including the upper beam 23 and the upper beam 5 including the upper beam junction bottom plate 14 and the partition plate 23 at right angles. The shape of the central graded portion 12 is such that when the central compression member 33 can be inserted and the leg portion of the supporting plate 1 receives a bending moment due to the ground reaction force, the compression force from the leg portion is reduced by the central compression member.
What is necessary is just a structure which can be transmitted to 33 reliably. Therefore, although the cross-sectional shape of the central compression member 33 of the central graded portion 12 is desirably a square, shapes such as a circle and a polygon are also possible.

Lower beam girder bottom plate 13 and upper beam girder bottom plate 14
Is required to have a thickness or the like so as to bear a tensile force generated by a moment due to a ground reaction force after installation. The lower beam girder bottom plate 13 and the upper beam girder bottom plate 14 are provided so as to come into contact with each other in a fitted state. Therefore, the bottom surface of the upper beam point bottom plate 14 is located at a position floating above the bottom by a thickness d substantially equal to the thickness of the lower beam point bottom plate 13. By doing so, when the beam 3 and the beam 5 are fitted at the central grid point 12, the bottom surface level and the top surface level match without any step difference.

The lower beam girder bottom plate 13 and the upper girder girder bottom plate 14 are not necessarily made of a plate material, for example, a steel plate. Any material that can withstand the tensile stress due to bending can be used. For example, a PC steel wire can be used. In such a case, for example, instead of the lower beam girder bottom plate 13 and the upper beam girder bottom plate 14, for example, the legs on both sides of the lower girder 3 sandwiching the lower girder girder 14
(7, 9) and the legs (7, 9) on both sides of the upper beam 5 may be connected to each other by using a PC steel wire to provide a central point at the center.

The lower beam hole 15 is formed at the center of the lower beam junction bottom plate 13 for passing the anchor 107. In addition, an upper beam hole 16 is formed in the center of the upper beam junction bottom plate 14, all of which allow the anchor 107 to pass through. The cross-sectional shape of the lower beam hole 15 and the upper beam hole 16 is desirably circular, but need not necessarily be circular and may be elliptical or another shape. As long as the inner diameters of the lower beam hole 15 and the upper beam hole 16 can pass through the anchor 107, there is no problem even if they have the same size or different sizes.

In the present invention, the central compression member 33 is inserted into the space of the central point 12. The reason is as follows. Figure
As shown in FIG. 5 (b), by inserting the central compression member into the central point and deforming the leg end in advance, the displacement becomes substantially uniform and the ground reaction force becomes substantially uniform.

As shown in FIG. 5 (c), the relationship between the force P for pushing the central compression member and the force Q for pushing the legs through the partition can be determined by the wedge theory. The relationship between P and Q and the amount of deformation (δ) of the leg end can also be obtained from the specifications of the support plate. That is, when the designed tensile force is applied, the design is made such that the deformation amount (Δ1) is such that the ground reaction force can be made uniform. For example,
In this example, the amount of deformation (Δ1) is set to の of the central displacement (displacement of the P portion) of the conventional supporting plate shown in FIG. 5 (a).

When the center compression member 33 is manufactured, a dimensional error may occur in manufacturing. For this reason, even if the central score 12 which is a space formed by the partition plate 23 of the lower beam 5 and the upper beam 3 is larger than the central compression member 33 and the dimensions are loose, the deformation The pressing interval is set so that the central compression member and the upper beam bottom plate do not contact each other before the deformation of (δ1) occurs.

When the support plate is installed, the leg end is deformed downward in advance, since the leg end may be bent downward by a predetermined amount. It can also be used for a body-shaped supporting plate. However, since the required initial deformation varies depending on construction conditions such as the soil condition at the site, it is difficult to determine the amount of bending in advance.

The central compression member 33 is shown schematically in FIG. Figure 4
(a) is a plan view, and FIG. 4 (b) is a front view. When the upper beam 5 and the lower beam 3 are combined, the central compression member 33 has an outer shape of a truncated regular pyramid so that it can be inserted into the space of the central point 12 having a truncated regular pyramid shape formed at the center. are doing. By inserting this central compression member 33 in the shape of a truncated regular pyramid into the central point 12,
The central score 12 acts to spread out, and the effect of the present invention can be achieved.

The central compression member 33 is integral with the ball seat 27 and has a trapezoidal cross section. A cylindrical cavity is provided above the central compression member hole 35 at the lower center, and a semi-spherical ball seat 27 is provided so as to cover the cylindrical hollow upper part. The ball seat 27 is for adjusting the installation angle of the anchor 107, and has an opening 29 through which the anchor 107 passes. It should be noted that an angle adjusting member or the like can be inserted between the anchor plate and the nut of the anchor head to cope with this installation angle, but in this case, the ball seat 27 becomes unnecessary. The lid member in this case is shown in FIGS. 4 (c) and 4 (d).

The height (H) of the central compression member 33 is slightly different from the design value when the central compression member 33 is manufactured,
Even if it becomes smaller than the dimension of 12 and becomes loose when inserted into the central point 12, it is manufactured with a margin so that the wedge effect can be exerted. The bottom of the central compression member 33 is prevented from reaching the lower beam girder bottom plate 13 of the upper beam 5 even when the wedge effect cannot be exerted due to the loosest.

The central compression member 33 is integrally manufactured by casting iron or steel, for example, but may be integrally manufactured by welding using a steel plate. As described above, by using the central compression member 33 produced by casting or welding using, for example, an iron material or a steel material, a supporting plate that is rigid and easy to assemble can be produced. The central compression member 33 can also be made by combining concrete and steel.

The support plate 1 is manufactured in a state of being separated from the upper beam 3, the lower beam 5, and the central compression member 33. Therefore, since the beams can be inverted in the width direction of each beam at the time of manufacturing, the work is easy, the work space is small, and the reversing device and the welding device can be small. Furthermore, a small storage space is required. In addition, it can be transported to the installation location while being separated.

The upper beam 3, the lower beam 5, and the central compression member 33 in the separated state are transported to an actual installation location and installed as follows. First, the lower beam 3 is placed, and the upper beam 5 is fitted thereon so as to form a cross. This fitting operation can be performed in a short time using a small crane. After that, the central compression member 33 is inserted into the space between the four partition plates 23, that is, the central scored portion 12. The inserted central compression member 33 applies a pushing force with a jack or the like. Adjust the pushing force and push the leg down until it deforms downward. Direct anchor force is used to equalize the ground reaction force.

For the support plate provided with the central compression member having a trapezoidal cross section, the mechanical behavior after assembly was subjected to a bending load test using a full-size specimen. as a result,
The support plate with a central compression member with a trapezoidal cross section is mechanically integrated because of the wedge-shaped structure, so it has the same strength characteristics as an integrated support plate, and has a flexural rigidity after assembly.
The proof stress does not decrease.

FIGS. 6 to 8 show a second embodiment of the present invention. As shown in FIG. 6, the support plate 1 is a combination of the lower beam 3, the upper beam 5, and the central compression member 33, and has a cross shape. FIG. 6 (a) shows a combination of the lower beam 3 and the upper beam 5,
The central compression member 33 is shown separately. FIG. 6 (b) is a schematic plan view of the support plate 1 in which the central compression member 33 is inserted into the central point 12 formed by combining the lower beam 3 and the upper beam 5.

The lower beam 3 and the upper beam 5 are each composed of two pairs of legs 7, 2
Pairs of leg bottom plate 9, two pairs of partition plates 25 and one pair of lower beam girder bottom plate 1
It is composed of three. A lower beam hole 15 is formed substantially at the center of the lower beam junction bottom plate 13, and an upper beam hole 16 is formed substantially at the center of the upper beam junction bottom plate 13. The lower beam girder bottom plate 13 and the upper beam girder bottom plate 14 are fitted at right angles, and the central girder 12 surrounded by the partition 23 of the lower girder 3 and the partition 23 of the upper girder 5 is formed. Form.

The beam will be described below. A schematic diagram of the lower beam 3 is shown in FIG. 7, and a schematic diagram of the upper beam 5 is shown in FIG. (A) of each figure is a plan view, and (b) is a front view. The central point 12 has a truncated cone shape. The design concept of the constituent members is the same as the first embodiment. Hereinafter, points different from the first embodiment will be described.

When the lower beam 3 and the upper beam 5 are combined, the partition plate 23 is inclined so that the cross section becomes smaller at a constant rate toward the lower side of the central score portion 12 so that the end portion of the leg 7 is Attached to. The partition plate 25 having a circular cross section is provided with a partition plate having a folded plate projecting in a 45-degree direction, but the folded plate portion may be omitted.

The lower beam girder bottom plate 13 and the upper beam girder bottom plate 14
The shape of the lower beam 3 and the upper beam 5 is an oval shape in which a crescent portion is cut from both ends with respect to any one of the vertical and horizontal axes passing through the center of a planar circle. In order to overlap the lower beam 3 on the lower side and the upper beam 5 on the upper side,
The mounting position of the lower beam 3 is attached to the upper part by the thickness of the lower beam bottom plate, and the mounting dimensions of the lower beam 3 and the lower beam girder bottom plate 13 and the upper girder girder bottom plate 14 also have a gradient It is decided in consideration of.

The central compression member 33 is shown schematically in FIG. Figure 9
(a) is a plan view, and FIG. 9 (b) is a front view. The center compression member 33 has a truncated conical cross section so that when the upper beam 5 and the lower beam 3 are combined, the central compression member 33 can fit into the space of the central point 12 having a truncated cone shape formed at the center.

The third embodiment of the present invention will be described with reference to the schematic diagram of FIG. FIG. 10 (a) is a cross-sectional view of a support plate in which a central compression member 33 is inserted in a central point. In the first and second embodiments, when the central compression member 33 is inserted, an example is shown in which the surface where the central compression member 33 contacts the partition plate 23 is smooth.

FIG. 10 (b) shows a bearing plate having a saw-toothed surface formed on the surface where the central compression member 33 and the partition plate 23 are in contact with each other, and having a saw-toothed upper surface 43. In the present invention, since the anchor force is directly used to equalize the ground reaction force, the support plates are combined at the installation position and the central compression member 33 is inserted. At this time, a member provided with a saw-tooth surface 43 which has been subjected to a saw-tooth processing in advance on a surface where the central compression member 33 and the partition plate 23 are in contact with each other is used. Thereby, it is possible to accurately push in the work at the installation site, for example, by driving every pitch.

In this example, the bottom of the central compression member 33 is
Since the wedge effect can be sufficiently achieved by pushing in the trapezoidal central compression member 33, it is not always necessary to reach the lower beam junction bottom plate 13. In addition, since it is difficult to come off when inserted, it is structurally completely integrated when assembly is completed, and does not separate during small transport to the installation position. Therefore, the saw-tooth surface 43 is not limited to the saw-tooth shape, and may be wavy or rectangular as long as it can be formed on the surface where the central compression member 33 and the partition plate 23 are in contact.

The fourth embodiment of the present invention will be described with reference to the schematic diagram of FIG. FIG. 11 (a) is a cross-sectional view of a supporting plate in which a wedge-shaped pedestal 45 is incorporated at a central point portion and a central compression member 33 is inserted inside the pedestal. FIG. 11 (b) shows the central compression member 33.
It is a perspective view of. FIG. 11C is a perspective view of a cylindrical wedge-shaped pedestal 45 in which wedges 46 are combined. FIG. 11D is a perspective view of the wedge 46. FIG.

In this example, the circular partition plate 25 is provided perpendicular to the leg bottom plate surface. A wedge-shaped pedestal 45 in which a wedge 46 obtained by dividing a hollow frustoconical member into four parts is arranged inside the partition plate 25 in which the beams are combined. A slope is provided on the inner surface of the wedge-shaped pedestal 45, and the central compression member 33 is inserted inside the slope. The outer surface of the central compression member 33 is also provided with a gradient. Therefore, after assembling the upper beam and the lower beam, the supporting plate is completed by pushing the central compression member 33 using an appropriate pushing device.

In the present embodiment, the bottom of the wedge-shaped pedestal 45 can sufficiently achieve the wedge effect by pushing the trapezoidal central compression member 33, so that it is not always necessary to reach the lower beam girder bottom plate 13. In addition, it is also possible to use a member in which both surfaces where the center compression member 33 and the wedge-shaped member seat 45 are in contact are processed in advance in a sawtooth shape.

Further, the partition plate 25 may be provided with a slope so that the central point portion is formed into a truncated cone shape, and the outer peripheral surface of the wedge-shaped pedestal 45 may be provided with a slope in accordance with the partition plate 25 (not shown). That is, the effect of the present invention can be further enhanced by using the wedge-shaped pedestal 45 and the central compression member 33 having the same gradient in the direction.

In a fifth embodiment of the present invention, the portion formed by the box-shaped leg 7 and the leg bottom plate 9 in the first embodiment is a reinforced concrete member.
Only parts different from the first embodiment will be described below. FIG. 12 shows the lower beam in the present embodiment. FIG. 12A is a schematic plan view, and FIG. 12B is a schematic front view. FIG. 12 (c) is a schematic sectional view. Reinforced concrete legs 51 are provided in a straight line on both sides of the lower beam girder bottom plate 13 made of steel and the partition plate 23 attached at an angle. Reinforced concrete legs
51 has a trapezoidal cross section. Since the bending moment acting on the leg is large at the center, the cross section of the leg is designed so that its height and width decrease toward the end.

FIG. 13 shows a reinforcing bar arrangement diagram used when manufacturing the reinforced concrete legs 51. FIG. 13A is a schematic plan view, and FIG. 13B is a schematic front view. FIG. 13 (c) is a schematic sectional view. Reinforcing bars are tension bars 52, compression bars 53, distribution bars
54, one side of the tension reinforcing bar 52 and the compression reinforcing bar 53
It was attached by welding. The lower beam 3 was produced by casting concrete in a formwork capable of fixing the steel lower beam girder bottom plate 13 and the two partition plates 23 with bolts. Here, the reinforced concrete legs of the lower beam have been described, but the reinforced concrete legs of the upper beam have exactly the same structure (the drawing is omitted).

Reference values for the separation type supporting plate having a nominal tensile strength of 50 tf in the present embodiment are as follows. The total length of the upper and lower beams is 3400 mm, the height of the leg trapezoidal cross section just before the central point 12 is 320 mm, and the bottom width is 450 mm. The used rebar is a tension rebar 52 with a nominal diameter of 22 mm and a compression rebar.
53 is a deformed reinforcing bar with a nominal diameter of 19 mm. In addition, the embodiment
Also in 2, it is possible to manufacture with a reinforced concrete member instead of the leg member (composed of the leg 7 and the leg bottom plate 9) made of a steel plate.

A sixth embodiment of the present invention is the fifth embodiment of the present invention, wherein the reinforced concrete member is a prestressed concrete structural member. FIG. 14 shows the lower beam in this embodiment. The cross section of the leg of the lower beam is the same as that of the fifth embodiment. However, a fixing space for introducing prestress is provided at the end of the leg.

FIG. 14 shows the arrangement of the PC steel bars. FIG. 14 (a) is a schematic plan view, and FIG. 14 (b) is a schematic front view. Fig. 14
(c) is a schematic sectional view. In the present embodiment, a prestress is introduced by a post-tension method. That is, the PC steel bar 56 is arranged on the tensile side of the cross section, and high-strength concrete is cast. After the curing period and the removal of the formwork, a tensile force was applied to the PC steel bar 56 so that prestress was applied to the concrete. Here, the leg made of pressed concrete of the lower beam has been described, but the leg made of pressed concrete of the upper beam has exactly the same structure (not shown). When the upper beam is overlapped with the lower beam, the lower beam end plate side fixing bracket 57 and the upper beam bottom plate do not hit each other. Also, when the center compression member is fitted, the upper beam does not hit the compression member. The bottom plate has four notches, and the central compression member has two grooves on one side, for a total of eight grooves.

Reference values for the separation-type supporting plate having a nominal tensile strength of 50 tf in the present embodiment are as follows. The total length of the upper and lower beams is 3400 mm, the height of the leg trapezoidal section in front of the central point is 230 mm, and the bottom width is 450 mm. PC used
The nominal diameter of the steel bar is 22mm. As described above, by adopting the prestressed concrete structure, the cross section can be made smaller than in the case of the reinforced concrete structure, and the workability is improved because the economy and weight are reduced. Here, the reason why the bottom width is made the same is that there is a restriction on the contact pressure.
If a larger ground pressure is allowed, the width can be reduced, resulting in a more reasonable cross section.

In the above, the post-tension method is used as a method for introducing the pre-press. However, it is also possible to adopt a pre-tension method in which a pre-stress is introduced before the concrete is poured and the concrete is poured as it is. . Further, as a tensile member for introducing a compressive force to concrete, a stranded PC steel wire or the like can be used in addition to a PC steel rod. Also in the second to fourth embodiments, leg members made of steel plate (composed of leg 7 and leg bottom plate 9)
Instead, it can be made of prestressed concrete.

[0069]

According to the present invention, the separation type supporting plate in which the lower beam and the upper beam are assembled in a cross shape at the installation site, and the central compression member is fitted into the central space thereof and integrated therewith has a small size during transportation. There is no problem of weight at all, and by making the central compression member wedge-shaped, the characteristics are equal to or higher than those of the integrated pressure plate. Also,
Since the central compression member is wedge-shaped, initial deformation can be applied to the legs of the support plate, so that the ground reaction force can be made substantially uniform, and even near the end of the legs, slopes can be formed. Sediment can be suppressed effectively.

[Brief description of the drawings]

FIG. 1 is a perspective view of a support plate according to a first embodiment of the present invention.

FIG. 2 is a view of a lower beam according to the first embodiment of the present invention.

FIG. 3 is a diagram of an upper beam according to the first embodiment of the present invention.

FIG. 4 is a view of a central compression member according to the first embodiment of the present invention.

FIG. 5 is a diagram showing displacement of a support plate and a ground reaction force.

FIG. 6 is a perspective view of a support plate according to a second embodiment of the present invention.

FIG. 7 is a view of a lower beam according to the second embodiment of the present invention.

FIG. 8 is a diagram of an upper beam according to a second embodiment of the present invention.

FIG. 9 is a view of a central compression member according to a second embodiment of the present invention.

FIG. 10 is a cross-sectional view of a support plate according to a third embodiment of the present invention.

FIG. 11 is a cross-sectional view and a perspective view of a support plate according to a fourth embodiment of the present invention.

FIG. 12 is a schematic view of a support plate according to a fifth embodiment of the present invention.

FIG. 13 is a bar layout diagram according to the fifth embodiment of the present invention.

FIG. 14 is a schematic view of a support plate according to a sixth embodiment of the present invention.

FIG. 15 is a layout view of a PC steel bar according to a sixth embodiment of the present invention.

FIG. 16 is a vertical sectional view of a mountain skin showing an anchor method.

FIG. 17 is a plan view of various supporting plates.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support plate 3 Lower beam 5 Upper beam 7 Leg 9 Leg bottom plate 12 Central score 13 Lower beam score bottom plate 14 Upper beam score bottom plate 15 Lower beam hole 16 Upper beam hole 23 Folded plate-shaped diaphragm 25 Circular partition plate 27 Ball seat 29 Opening 33 Central compression member 35 Central compression member hole 43 Serrated surface 45 Wedge-shaped pedestal 46 Wedge 51 Concrete leg 52 Tension bar 53 Compressed bar 54 Distribution bar 55 Fixing space 56 PC bar 57 Fixing Hardware 101 Road 103 Mountain skin 105 Slope 107 Earth anchor 109 Support plate 111 Hole 113 Arm 115 Auxiliary plate 117 Fastener

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Yonemura 5-11-3 Shimbashi, Minato-ku, Tokyo Toko Construction Co., Ltd. (72) Inventor Muneto Satomura 5-11-3 Shimbashi, Minato-ku, Tokyo Toko Construction Co., Ltd. (72) Inventor Junichi Takio 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Within Nihon Kokan Co., Ltd. (72) Inventor Hiroshi Toida 6-14-11 Tsukushino, Abiko-shi, Chiba F-term (reference) 2D044 DB51 EA01

Claims (14)

[Claims] 1. A separation-type supporting plate comprising the following members. (a) Lower beam girder bottom plate (13) with lower beam hole (15) in the center
And a box-shaped leg (7), which is linearly arranged on both sides of this and has a centrally mounted partition (23) inclined thereto
A lower beam (3) integrally formed with the leg bottom plate (9) on which the
(b) Upper beam girder bottom plate (14) with upper beam hole (16) in the center
And a leg bottom plate (9) on which a box-shaped leg (7) with a partition plate (23) attached to the center side is placed, which is linearly arranged on both sides of this and sandwiches it. The formed upper beam (5), (c) the lower beam girder bottom plate (13) and the upper beam girder bottom plate (14), the upper beam (5) and the lower girder (3) cross each other. When combined as described above, the partition (23) of the lower beam (3) and the partition (23) of the upper beam (5)
(D) inserted into the central score portion (12), the lower beam hole (15) and the upper beam hole (1).
6) and a central compression member (33) for fixing an earth anchor (107) passing therethrough. 2. A separation support plate comprising the following members. (a) Lower beam girder bottom plate (13) with lower beam hole (15) in the center
And a box-shaped reinforced concrete or prestressed concrete leg with a partition plate (23) attached to the center inclining, which is linearly arranged on both sides of this.
(51) and the lower beam (3) integrally formed, (b) an upper beam girder bottom plate (14) having an upper beam hole (16) in the center, and straight lines on both sides of this. Upper beam integrally formed with a box-shaped reinforced concrete or prestressed concrete leg (51) attached to the center side with a partition plate (23)
(5) and (c) the lower beam girder bottom plate (13) and the upper beam girder bottom plate (14) were combined such that the upper beam (5) and the lower girder (3) were perpendicular to each other. At this time, a central score (12) formed between the partition (23) of the lower beam (3) and the partition (23) of the upper beam (5).
(D) the lower beam hole, which is inserted in the central score (12),
(15) and the earth anchor (10) passing through the upper beam hole (16).
Central compression member (33) for fixing 7). 3. The shape of the lower beam girder bottom plate (13) and the upper beam girder bottom plate (14) is such that any one of the vertical and horizontal axes passing through the center of the circle is symmetrical, and 3. The separation support plate according to claim 1, wherein the support plate has an oval shape. 4. The shape of the central score portion (12) is selected from a truncated cone shape, a truncated quadrangular pyramid shape, and a truncated polygonal shape.
The separation type support plate according to claim 1, wherein the separation type support plate is one type. 5. The central score portion (12) includes two pairs of legs (3) of a lower beam (3) instead of the lower beam score bottom plate (13) and the upper beam score bottom plate (14). Each of the two sets of legs (5), 5) and the upper beam (5), is joined by using a PC steel wire, and the lower beam (3) and the upper beam (5) are formed at right angles to each other. The separation type support plate according to claim 1, 2, or 4, wherein: 6. The central compression member (33) is provided with a cylindrical hollow above the central compression member hole (35) at the lower part of the center, and an anchor (107) is installed so as to cover the upper part of the hollow cylinder. Claim: A ball seat (27) with an opening (29) for adjusting the angle, or only a central compression member (35) is provided. 3. The separation type supporting plate according to any one of 1 and 2. 7. The central compression member (33) includes a central compression member.
The separation type support according to any one of claims 1, 2, and 6, further comprising a serrated surface (43) on a surface where the (33) and each partition (23) are in contact. Platen. 8. The method according to claim 1, wherein the central compression member is made by casting or welding using iron or steel. 7
2. The separation support plate according to 1. 9. The height of the central compression member (33) is provided so that the bottom of the central compression member (33) does not reach the upper beam girder bottom plate (14). The separation type supporting plate according to claim 1, claim 2, or claim 6. 10. The central compression member (33) is mounted in the center of a cylindrical wedge-shaped pedestal (45) obtained by combining a wedge (46) obtained by dividing a hollow truncated cone-shaped member into four parts. The separation type supporting plate according to any one of claims 1, 2, and 6 to 9, wherein 11. The central compression member (33) includes a hollow truncated cone-shaped member inside a vertically provided circular partition (25).
Cylindrical wedge-shaped pedestal (4
The separation supporting plate according to any one of claims 1, 2, and 6 to 10, wherein the separation supporting plate is inserted in the center of (5). 12. The central compression member (33) is formed by dividing a hollow truncated cone-shaped member having an outer peripheral surface having substantially the same gradient into four inside a circular partition plate (25) having a gradient. Wedge (46)
The cylindrical wedge-shaped pedestal (45) combined with is mounted at the center of the cylindrical wedge-shaped pedestal (45).
A separation type support plate according to any one of claims 6 to 11. 13. An upper beam (3) and a lower beam (5) are connected to a central point (12).
After assembling, insert a wedge-shaped structure into the central point after assembly and apply a pushing force with a jack or the like at the time of assembly at the site, or center the wedge-shaped structure using the tensile tension of the anchor A method for assembling a separation-type support plate, characterized in that a support plate (1) for fixing an earth anchor (107) is obtained by pushing the support member into a case portion and integrating two members. 14. A wedge-shaped structure is pushed in when two members of a separation-type support plate are cross-fitted at a central point and a wedge-shaped structure is inserted into the central point and assembled. Adjust the power,
Push in until the legs are deformed downward, and ground anchor
The method for assembling a separation-type support plate according to claim 13, wherein a support plate (1) for fixing the (107) is obtained.