JP2002030664A - Tie rod fixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tie rod fixing device capable of allowing a construction error since a fixing can be performed in correspondence with various sizes of H steel piles, eliminating the need of a formwork at the time of placing of slab concrete and, in the fixing on the ground side, properly transmitting the tensile force of a tie rod to an anchor side. SOLUTION: In this fixing device 3 on a front wall side, an H steel pile 7 is held by generally hook-shaped clamp members 30 and 31. The clamp members are formed of the steel materials of generally channel shape in cross section, and the overlapped position of overlapping pieces having elongated holes provided therein is displaced appropriately to hold the steel pile. A tie rod 6 is passed through two elongated holes in the overlapped state, a flat seat plate 32 and a recessed receiving seat plate 33 are pressed against the front and rear surfaces thereof, and the seat plates are tightened with round head nuts 34. In the fixing device 5 on the ground side, a connection plate 5, a turnbuckle 52, and the tie rod 6 are connected to a pressure retaining plate 50 fixed to an anchor rod 9 in that order. A pair of connection pieces 501 are installed on the pressure retaining plate symmetrically with respect to a hole part allowing the anchor rod to be passed therethrough, and the connection plate 53 is connected to the connection pieces 501.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tie rod anchoring device to be embedded in a concrete floor slab of an intermediate layer or a surface layer in the construction of widening embankment on a slope, and more particularly, to a tie rod anchoring to an H-shaped steel pile on a front wall. In addition, the present invention relates to a tie rod fixing device in which the other end is connected to an anchor rod exposed on the ground surface so as to be tensioned by a predetermined tensile force.

[0002]

2. Description of the Related Art With regard to the construction of widened embankments on slopes, a construction method called lightweight embankment, which uses lightweight foam plastic as an embankment material, is known. We are trying to reduce the earth pressure.

[0003] In other words, the construction of a lightweight embankment is performed, for example, on a widened embankment on an inclined land, as shown in FIG.
And the front wall 102 are filled with a foamed plastic 103 as an embankment material. Also, in order to disperse a load, protect the foamed plastic 103, and make uneven terrain, etc., an intermediate portion and an uppermost portion of the foamed plastic 103 are provided. Concrete floor slabs 104 and 105 are provided respectively.

As described above, the lightweight foamed plastic 10
Since 3 is filled as the embankment material, the earth pressure acting on the back surface of the front wall 102 can be reduced. However, in this case, it is difficult to make the back slope 101 integral with the filling layer of the foamed plastic 103, and the earth pressure can be reduced but is still larger than the earth pressure value of the stable slope.

For this reason, concrete slabs 104, 10
A tie rod 106 is buried in 5 as a tension member, and the tie rod 106 connects the sloped ground 101 (ground) side and the front wall 102 side to ensure the stability of the structure. In other words, one end of the tie rod 106 is
2 and the other end is connected to the slope 101
Of the tie rod 10 at this time,
A predetermined tensile force is applied to 6 to fix it in a tensioned state.

[0006] The steel stake 107 has an H-shaped cross section. For fixing the tie rod 106 to the H-shaped steel stake 107, as shown in FIG. FIG. 8 (B) shows a connection bracket (hereinafter referred to as an A bracket) having a configuration in which the steel pile 107 is sandwiched between the U-shaped sandwiching pieces 132 and 132 and the tie rod 106 is fixed to a mounting hole at the center of the flat steel strip 131. ), Substantially hook-shaped sandwiching pieces 142, 142 rotatably attached to both ends of the strip 141.
Thus, a club hook type connection fitting (hereinafter referred to as a B fitting) having a configuration in which the steel stake 107 is interposed therebetween and the tie rod 106 is fixed to the mounting hole at the center of the strip 141 is used.

To fix the tie rod 106 to the anchor rod 109 on the ground side, as shown in FIG. 9, a support plate 150 is attached to the tip of the anchor rod 109 and pressed against the ground surface. Turnbuckle 152 with jaw bolt 151 at the tip
Are connected, and a connecting fitting (referred to as a C fitting) configured to connect the jaw bolt 151 to the connecting portion 155 of the support plate 150 is used.

[0008]

However, the above-described conventional tie rod fixing structure has the following problems.

(1) In the construction of the front wall, the size of the H-shaped steel pile 107 to be used is variously changed according to design conditions such as wall strength. However, in the A and B fittings described above, the steel pile 10
If the size of 7 is changed, it cannot be mounted. Therefore, it is necessary to prepare a dedicated product of a corresponding size that can be sandwiched, which is not preferable in terms of cost.

Further, the tie rods 106 may not be able to be arranged at regular positions due to errors in the fitting of the parts generated during construction. However, in the above-described A and B fittings, if the tie rods 106 do not face each other, extra parts are required for the parts. Deformation force acts, and it becomes impossible to exhibit design strength as a structure.

Further, since the metal fitting A is made of flat steel, the cross-sectional strength tends to be insufficient. The metal fitting B has a stress concentrated on a substantially hook-shaped bent portion. And it cannot be made compact.

At the time of placing the floor slab concrete, it is necessary to surround the A and B fittings with a formwork in order to prevent burial.
Poor workability.

(2) In the fixing of the ground side by the metal fitting C,
The connecting portion 155 of the support plate 150 is pulled by the tie rod 106 that has been tensioned.
, And this causes improper pressure on the ground surface.

The present invention has been made in view of such circumstances, and it is possible to perform fixing by fixing the piles in correspondence with various sizes of H-shaped steel piles, tolerate a connection error at the time of construction, and to provide a sufficient Has cross-sectional strength and can be made compact,
There is no need for a formwork when placing slab concrete and the workability is good, and when fixing on the ground side, a tie rod fixing device that can properly transmit the tie rod tensile force to the anchor side and does not apply improper pressure to the ground surface The purpose is to provide.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, a fixing device according to a first aspect of the present invention is buried in a concrete slab by being tensioned with a predetermined tensile force in construction of widening embankment on an inclined ground. A tie rod fixing device, comprising: a pair of substantially hook-shaped clamp members in which an overlapping piece and an arm piece are connected in a substantially L-shape, and a contact piece is connected to a tip end of the arm piece in a locking posture; In preparation for the above, the overlapping piece is provided with a long hole through which the tip of the tie rod passes, and the overlapping position of the overlapping piece is appropriately shifted so that the arm piece is sandwiched between the H-shaped steel piles on the front wall. The tie rods penetrated through the two elongated holes in the overlapped state are put on the seat plate from the front and back of the elongated holes and fastened by the nut member.

According to a second aspect of the present invention, there is provided a fixing device for a tie rod.
The clamp member is formed of a steel material having a substantially U-shaped cross section.

According to a third aspect of the present invention, there is provided a fixing device for a tie rod.
The nut member is a round head nut having a substantially round head, and the seat plate is configured as a concave receiving seat plate having a recess corresponding to the head shape of the round head nut.

According to a fourth aspect of the present invention, there is provided a fixing device for a tie rod.
The seat plate is configured as an inclined receiving seat plate having a receiving surface inclined at a predetermined angle.

According to a fifth aspect of the present invention, there is provided a fixing device for a tie rod.
The height of the clamp member is configured to match the thickness of the concrete slab.

A fixing device according to a sixth aspect of the present invention is a fixing device for a tie rod to be buried in a concrete slab by being tensioned by a predetermined tensile force in the construction of widening embankment on an inclined ground, and the like. A support plate attached to the tip in a substantially facing position and pressed against the ground surface, a turnbuckle connecting a jaw bolt to the tip and connecting the other end to a tip of the tie rod, the support plate and the jaw bolt And a connection position between the support plate and the connection member such that a point of application of a tensile force applied from the tie rod to the support plate substantially coincides with a fixing portion between the anchor rod and the support plate. Set and configure.

According to a seventh aspect of the present invention, there is provided a fixing device for a tie rod,
The support plate is provided with a pair of connecting pieces at symmetrical positions with respect to the hole through which the anchor rod passes, and the connecting member is connected to the connecting pieces as a pair of strips bent into a substantially crank shape. Constitute.

The fixing device according to claim 8 is a fixing device for a tie rod which is buried in a concrete slab by being tensioned by a predetermined tensile force when performing widening embankment on an inclined ground, etc., wherein the tie rod is H-shaped on a front wall. The fixing device according to any one of claims 1 to 5, further comprising a fixing device according to any one of claims 1 to 5, wherein the fixing device fixes the tie rod to an anchor rod exposed on the ground surface. And a fixing device described in (1).

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tie rod fixing device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the present invention.
(A) is a plan view of a concrete slab in which a tie rod is embedded, and (B) is a cross-sectional view thereof.

The concrete floor slab 4 is installed on an intermediate layer of a lightweight embankment for widening a slope. An H-shaped steel pile 7 is disposed at an appropriate position on the front wall 2, and an anchor (not shown) is deeply driven into the ground of the sloping ground 1 on the rear side, and an anchor rod 9 is extended from the anchor. It is exposed on the ground surface.

A tie rod 6 is embedded in the concrete floor slab 4, and the tie rod 6 is
On the ground side, it is fixed to the steel pile 7 via the fixing device 3, and on the ground side, it is fixed to the anchor rod 9 via the fixing device 5.

As shown in FIG. 2, the fixing device 3 connected to the steel pile 7 is provided with two pairs of substantially hook-shaped clamp members 30, 31, which are fixed to the steel pile 7 for fixing. Configuration.

That is, each of the clamp members 30 and 31 is formed of a steel material having a substantially U-shaped cross section, and
311 is connected to the arm pieces 302 and 312 in a substantially L-shape, and the tips 303 and 313 are connected to the ends of the arm pieces 302 and 312 in a bent posture to form a substantially hook shape. One of the superposed pieces 301 is configured to have a narrow member width and can be superimposed on and adhere to the other superposed piece 311.
Are provided with long holes 304 and 314 through which the tip of the tie rod 6 passes.

The clamp members 30 and 31 move the overlapping positions of the overlapping pieces 301 and 311 as appropriate so that the arm pieces 302 and 312 are interposed and linked to the steel pile 7. At this time, the two elongated holes 30 in the superposed state
4 and 314 through the tie rods 6 through the slots 30
4,314 are tightened with nut members from the front and back. That is, the flat seat plate 32 and the concave receiving seat plate 33 are brought into contact with the front and back of the long holes 304 and 314, and are tightened by the round head nut 34.

As described above, the pair of clamp members 30, 3
1 is a long hole 30 in the overlapping pieces 301 and 311.
Since the 4,314 is provided, it can be slid according to the width of the H-shaped steel pile 7, and can be interlocked and linked. Therefore, the fixing can be performed by sandwiching the H-shaped steel piles 7 corresponding to various sizes. As a result, cost can be reduced.

As shown in FIG. 3, the head of the round head nut 34 has a substantially round head, and is used by facing a concave receiving seat plate 33 having a recess corresponding to the head shape. . This is because the clamp members 30 sandwiched between the steel piles 7
This is to allow the tie rod 6 to tilt when the tie rod 6 cannot be directly opposed to the base 31. That is, as shown in FIG.
, The head of the round head nut 34 can be displaced. Therefore, tie rod 6
Even if it is not possible to directly face the tie rod 6, the tilting posture of the tie rod 6 can be tolerated by shifting the head of the round head nut 34 with respect to the concave receiving seat plate 33, and the connection error at the time of construction is allowed. it can. Accordingly, it is possible to prevent an excessive deformation force from acting on each part, and it is possible to construct a structure that can properly exhibit design strength.

The round head nut 34 and the concave receiving seat plate 33 may not be used. For example, as shown in FIG. 4, an inclined receiving seat plate 35 having a receiving surface inclined at a predetermined angle may be used, and an inclined receiving seat plate 35 having a receiving surface with an inclination corresponding to the inclination of the tie rod 6 is prepared. It may be tightened by a normal nut member 36.

The height of the clamp members 30, 31 is
The setting is made to match the thickness of the concrete floor slab 4 in which the tie rods 6 are embedded. Here, these clamp members 3
Since 0 and 31 are formed of a steel material having a substantially U-shaped cross section,
The side facing the steel pile 7 is surrounded by each piece. Therefore, no formwork is required when the concrete slab 4 is cast. Therefore, the workability is extremely good, which is preferable for labor saving.

Further, since the clamp members 30, 31 are formed of a steel material having a substantially U-shaped cross section, the cross-sectional strength is sufficiently increased. Therefore, the size can be reduced.

The fixing device 5 connected to the anchor rod 9
As shown in FIG. 5, the support plate 50 on the anchor rod 9 side includes
In this configuration, fixing is performed by connecting with a connecting plate 53 and a turnbuckle 52.

That is, the support plate 50 is positioned symmetrically with respect to the hole 500 through which the anchor rod 9 passes,
1, 501 is provided, attached to the tip of the anchor rod 9 exposed on the ground surface in a substantially directly facing posture, and pressed against the ground surface. A turnbuckle 52 is attached to the tip of the tie rod 6.
And a jaw bolt 51 is attached to the tip of the turnbuckle 52. Further, the connecting plate 53 is a band plate bent and formed into a substantially crank shape. Two pairs are prepared and connected to the connecting pieces 501 and 501, respectively, and the other end is overlapped and connected to the jaw bolt 51.

As described above, since the connecting pieces 501 and 501 are provided symmetrically with respect to the hole 500 through which the anchor rod 9 passes, the tie rod 6 is used to turn the turnbuckle 52,
The point of application of the resultant force of the tensile force applied to the support plate 50 via the jaw bolt 51 and the connecting plate 53 substantially coincides with the fixed portion (that is, the hole 500) between the support plate 50 and the anchor rod 9. Accordingly, there is almost no biasing force with respect to the axis of the anchor rod 9, and the pulling force on the tie rod 6 side can be transmitted directly to the anchor rod 9 side. That is, the tensile force of the tie rod 6 can be properly transmitted to the anchor side, and an improper pressure is not applied to the ground surface.

[0038]

As described above, according to the present invention, the following excellent effects are exhibited.

(1) According to the first aspect of the present invention, a substantially hook-like shape is provided in which the overlapping piece and the arm piece are connected in a substantially L-shape, and the abutment piece is connected to the tip of the arm piece in a folded position. By providing two pairs of clamp members, the overlapping piece is provided with a long hole through which the tip of the tie rod passes, and the overlapping position of the overlapping piece is appropriately shifted so that the arm piece is attached to the H-shaped steel pile on the front wall. The tie rods that are sandwiched and linked to each other and penetrated through the two elongated holes in the overlapped state are tightened by the nut members by contacting the seat plate from the front and back of the elongated holes.
The piles can be sandwiched according to the various sizes of the steel piles and can be fixed. As a result, cost can be reduced.

(2) According to the second aspect of the present invention, since the clamp member is formed of a steel material having a substantially U-shaped cross section, the cross-sectional strength is sufficiently increased. Therefore, the size can be reduced.

(3) According to the third aspect of the present invention, the nut member is a round head nut having a substantially round head, and the seat plate has a recess corresponding to the head shape of the round head nut. Since the concave receiving seat plate is formed, the head of the round head nut can be displaced with respect to the concave receiving seat plate. Therefore, even if it is not possible to face the tie rod directly due to a connection error at the time of construction, by shifting the head of the round head nut with respect to the concave receiving seat plate, the inclination posture of the tie rod can be allowed, Tolerance errors during construction can be tolerated. This allows
Excessive deformation force can be prevented from acting on each part, and a structure that can properly exhibit design strength can be constructed.

(4) According to the fourth aspect of the present invention, the seat plate is an inclined receiving seat plate having a receiving surface inclined at a predetermined angle, so that a tie rod tilted due to a mounting error at the time of construction can be connected. Errors can be tolerated.

(5) According to the fifth aspect of the present invention, the height of the clamp member is made equal to the thickness of the concrete slab, so that the inside facing the steel pile is surrounded, and the concrete of the slab is struck. No formwork is required during installation. For this reason,
The workability is extremely good, which is preferable for labor saving.

(6) According to a sixth aspect of the present invention, the supporting rod is attached to the tip of the anchor rod exposed on the ground surface in a substantially opposite posture and pressed against the ground surface, and the jaw bolt is connected to the tip. The other end includes a turnbuckle connected to the tip of the tie rod, and a connecting member connecting the support plate and the jaw bolt, and a point of application of a tensile force applied from the tie rod to the support plate is substantially at a fixing portion between the anchor rod and the support plate. Since the connecting position between the supporting plate and the connecting member is set so as to match,
The tie rod pulling force can be properly transmitted to the anchor side, preventing improper pressure from acting on the ground surface.

(7) According to a seventh aspect of the present invention, a pair of connecting pieces are provided on the support plate at symmetrical positions with respect to the hole through which the anchor rod passes, and the connecting member is formed into a pair of substantially crank-shaped bent members. Are respectively connected to the connecting pieces as a strip. In this case, the point of application of the tensile force applied from the tie rod to the support plate substantially coincides with the fixed portion between the anchor rod and the support plate, so that the same operation and effect as in claim 6 are obtained.

(8) The invention according to claim 8 has the fixing device according to any one of claims 1 to 5 as a fixing device for fixing the tie rod to the H-shaped steel pile on the front wall, and the tie rod is exposed on the ground surface. Since the fixing device according to claims 6 or 7 is provided as a fixing device for fixing to the anchor rod, the above (1) to (1)
The effect and effect as (7) can be obtained comprehensively, and it can be fixed by sandwiching according to various sizes of H-shaped steel piles, tolerance for connection at the time of construction can be tolerated, and sufficient sectional strength can be obtained. It is compact and compact, no formwork is required when placing slab concrete, and the workability is good, and when anchoring on the ground side, the tensile force of the tie rod can be properly transmitted to the anchor side, so that improper pressure does not act on the ground surface It becomes a highly reliable tie rod fixing device.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (A) is a plan view of a concrete slab in which tie rods are embedded, and (B) is a cross-sectional view thereof.

FIG. 2 is an exploded perspective view showing a fixing device on an H-shaped steel pile side of FIG. 1;

3A and 3B are diagrams for explaining fitting of a round head nut and a concave receiving seat plate, wherein FIG. 3A shows a posture in which the round head nut is erected, and FIG. 3B shows that the round head nut is inclined. Indicates posture.

FIG. 4 is a sectional view showing another example of a nut and a seat plate.

FIG. 5 is a perspective view showing a ground-side fixing device of FIG. 1;

FIG. 6 is an enlarged sectional view showing a ground-side fixing device of FIG. 1;

FIG. 7 is a cross-sectional view showing a construction example of a lightweight embankment.

FIGS. 8A and 8B are plan views showing a conventional example of the fixing device on the side of the H-shaped steel pile, wherein FIG. 8A is a flat metal connection fitting, and FIG. 8B is a club hook type connection fitting.

FIG. 9 is a side view showing a conventional example of a ground-side fixing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slope ground 2 Front wall 3,5 Anchor 4 Concrete floor slab 6 Tie rod 7 Steel pile 9 Anchor rod 30, 31 Clamp member 32 Flat seat plate 33 Depressed seat plate 34 Round head nut 35 Inclined seat plate 36 Nut member 50 Pressure plate 51 jaw bolt 52 turnbuckle 53 connecting plate (connecting member) 301,311 overlapping piece 302,312 arm piece 303,313 contact piece 304,314 long hole 500 hole 501 connecting piece

 ──────────────────────────────────────────────────続 き The continuation of the front page F term (reference) 2D041 GA05 2D044 CA08

Claims (8)

[Claims] 1. A tie rod fixing device which is buried in a concrete floor slab by being tensioned by a predetermined tensile force in the construction of widening embankment or the like on an inclined ground, wherein the overlapping piece and the arm piece are connected in a substantially L-shape. A pair of substantially hook-shaped clamp members each having a contact piece connected to the tip of the arm piece in a folded position, and the overlapping piece is provided with a long hole through which the tip of the tie rod passes.
By appropriately shifting the overlapping position of the overlapping pieces, the arm pieces are sandwiched and linked to the H-shaped steel pile on the front wall, and the tie rods penetrated through the two elongated holes in the overlapping state have their lengths changed. A fixing device for a tie rod, wherein a seat plate is applied from both sides of a hole and tightened by a nut member. 2. The tie rod fixing device according to claim 1, wherein the clamp member is formed of a steel material having a substantially U-shaped cross section. 3. The nut member is a round head nut having a substantially round head, and the seat plate is a concave seat plate having a recess corresponding to the head shape of the round head nut. The tie rod fixing device according to claim 1 or 2, wherein 4. The tie rod fixing device according to claim 1, wherein the seat plate is an inclined receiving seat plate having a receiving surface inclined at a predetermined angle. 5. The tie rod fixing device according to claim 1, wherein a height of the clamp member is made equal to a thickness of the concrete slab. 6. A fixing device for a tie rod to be buried in a concrete slab by being tensioned by a predetermined tensile force in the construction of widening embankment on a slope, etc., wherein the tie rod is fixed to a front end of an anchor rod exposed on a ground surface. A support plate attached and pressed against the ground surface, a turnbuckle connecting the jaw bolt to the tip and connecting the other end to the tip of the tie rod, and a connecting member connecting the support plate and the jaw bolt, The connection position between the support plate and the connecting member is set such that the point of action of the tensile force applied from the tie rod to the support plate substantially coincides with the fixed portion between the anchor rod and the support plate. Tie rod fixing device. 7. A pair of connecting pieces are provided on the support plate at symmetric positions with respect to a hole through which the anchor rod passes, and the connecting member is formed as a pair of strips bent into a substantially crank shape. 7. The tie rod fixing device according to claim 6, wherein the tie rod fixing device is connected to the tie rods. 8. A fixing device for a tie rod to be buried in a concrete slab by being tensioned by a predetermined tensile force in the construction of widening embankment or the like on an inclined ground, wherein the tie rod is fixed to an H-shaped steel pile on a front wall. A fixing device according to any one of claims 1 to 5 as a device, and a fixing device according to any one of claims 6 to 7 as a fixing device for fixing the tie rod to an anchor rod exposed on the ground surface. A fixing device for a tie rod.