JPH07243214A - Bearing plate device for ground anchor - Google Patents

Abstract

PURPOSE:To easily correct the axial misalignment of an anchor by freely adjusting the bearing and inclination angles of a guide cylinder via the turning operation thereof relative to a base plate as well as the turning operation of an adjusting washer formed out of a tapered washer. CONSTITUTION:A base plate 20 is laid on the natural ground 50, with the planes thereof kept in contact with each other, and a guide cylinder 20 having the prescribed inclination angle is mounted on the base plate 20. Also, an adjusting washer 40 formed out of tapered washers 41 and 41 is provided between the base plate 20 and the cylinder 30. Then, the inclination and bearing angles of the cylinder 30 are adjusted via the turning operation of the washer 40 as well as the turning operation of the cylinder 30 relative to the base plate 20, thereby completely aligning the axial lines of the section of an anchor 53 exposed from a bearing plate and the section thereof positioned underground, along the same linear line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing plate device for a ground anchor (hereinafter referred to as "bearing plate device") having a function of correcting misalignment of an axis of an anchor.

[0002]

2. Description of the Related Art As a slope collapse prevention work, an anchor construction method is known in which an anchor having a length reaching a deep underground is formed, and the anchor is tensioned and fixed from the slope side to restrain the collapsed sand. There is. In this anchor construction method, as shown in FIG. 10, a pressure receiving plate c such as a concrete block is inserted into an anchor b protruding from a slope a, and a pressure bearing plate d is attached to the pressure receiving plate c.
Then, the pedestal e is inserted and the fixing tool f fixes the tension.

[0003]

The slope protection technology described above has the following problems.

<A> Exposed from the slope a due to the inclination of the pressure receiving plate c due to the unevenness of the slope a or the shaping error, the drilling error of the anchor hole, the displacement of the pressure receiving plate c due to its own weight drop, and the like. It is technically difficult to align the axis of the anchor b with the axis of the anchor located in the ground. When the fixing is performed in such a state, the anchor b bends at each point of the pressure receiving plate c, the pressure support plate d, and the fixing tool f as shown by black circles and easily abuts these members. There is a risk of disconnecting.

<B> As a method of solving such a problem, there are a method of accurately shaping the planned installation surface of the pressure receiving plate c, a method of manufacturing the pedestal e according to the state of the site, and a shape (tilt angle). It is conceivable to manufacture a plurality of different types of pedestals e and cambers (not shown) and use the pedestals e and the camber properly according to the state of the site. Both methods have a heavy burden in terms of construction cost and construction period, moreover, the feasibility becomes poor due to complicated management, and basic problems cannot be completely solved.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a pressure bearing plate device capable of avoiding bending of the anchor by adjusting the direction of the anchor shaft to be fixed. Especially.

[0007]

According to the present invention, in a bearing plate for a ground anchor interposed between a tension end of an anchor fixed in the ground and the ground, the anchor can be inserted in contact with the ground. A base plate and a cylindrical transmission member attached to the base plate at a fixed inclination angle, the transmission pipe is rotatably attached to the base plate, and the transmission pipe is rotatably operated. It is a bearing plate device for a ground anchor, characterized in that the displacement can be corrected.

According to the present invention, there is provided a support plate for a ground anchor interposed between a tension end of an anchor fixed in the ground and a ground, and a substrate capable of inserting the anchor in contact with the ground. It is placed between the substrate and the tubular transmission member that supports the tension force of the anchor while being separated from the substrate, and transmits this tension force to the substrate, and the transmission member has a certain inclination angle with respect to the substrate. A ground anchor, characterized in that it is composed of an adjustment washer to be applied, the transmission cylinder is rotatably attached to the substrate, and the axial displacement of the anchor can be corrected by rotating the transmission cylinder. It is a pressure bearing plate device.

Further, the present invention relates to a ground anchor bearing plate device which is interposed between a tension end of an anchor fixed in the ground and a ground, and a substrate which is in contact with the ground and through which the anchor can be inserted. A tubular transmission member that is spaced apart from the substrate to support the tension of the anchor and that transmits the tension to the substrate.
An adjustment washer interposed between the substrate and the transmission member, and a guide pipe that is mounted on the anchor protruding from the ground and is inserted into the substrate, and the transmission cylinder is rotatably attached to the substrate. It is a bearing plate device for a ground anchor, characterized in that the transmission cylinder is rotationally operated to correct the axial displacement of the anchor.

Further, the present invention is characterized in that the adjusting washer is composed of a laminated body of a plurality of taper washers, and the axial displacement of the anchor can be corrected by rotationally operating the taper washer. Pressure bearing plate device.

Further, the present invention is a bearing plate device for a ground anchor, characterized in that a plurality of protrusions for adjusting the axial center of the anchor are provided on the inner peripheral surface of the adjustment washer.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

<B> Pressure Bearing Plate Device FIGS. 1 and 2 show an example of the pressure bearing plate device 10. Bearing plate device 1
0 is a substrate 20 that is in contact with the ground and supports the ground, and a substrate 2
The transmission member 30 is rotatably attached so that the inclination angle can be adjusted with respect to zero. Each part will be described below.

<B> Substrate The substrate 20 is a rectangular steel plate having a hole 21 for inserting an anchor in the center thereof and a plurality of bolt holes 22 and pin holes 23 around the hole 21. ing.
The shape of the substrate 20 is not limited to the rectangular shape shown in the drawing, and an appropriate shape can be selected, and a plurality of handles 24 having a substantially U shape may be attached to the peripheral edge of the substrate 20.

<C> Transmission Member The transmission member 30 includes a transmission cylinder 31 of which both ends are open and a transmission cylinder 31.
Upper transmission plate 32 attached to the upper end of the
Adjustment washer 40 attached to the lower end of the
And a floor plate 34 attached to the lower surface of the. The transmission cylinder 31 is a rigid cylinder, and is a member for maintaining a constant gap between the substrate 20 and the upper transmission plate 32 and transmitting the tension force introduced into the anchor to the substrate 20. Upper transmission plate 3
Reference numeral 2 is a member having a pedestal function for installing a fixing tool and an anchor plate, and an opening 3 for inserting an anchor is provided in the center thereof.
3 and is fixed to the upper end of the transmission cylinder 31 by welding or the like so that the upper surface of the upper transmission plate 32 is orthogonal to the axis of the transmission cylinder 31.

<D> Adjusting washer The adjusting washer 40 is composed of a pair of taper washers 41, 41 whose plate thickness gradually changes. Each taper washer 41 has an overall shape of a square or a disk, and an anchor is inserted in the center thereof. Hole 42
By rotating both the tapered washers 41, 41, the wall thickness of the adjustment washer 40, that is, the intersection angle between the upper surface 43 and the lower surface 44 of the adjustment washer 40 can be arbitrarily adjusted.

<V> Base plate The base plate 34 has an opening 35 for inserting an anchor formed in the center of the plate surface, and the bolt holes 2 of the base plate 20 are formed around the opening 35.
2, a plurality of elongated holes 36 corresponding to 2 are formed, and bolts 25,
It is attached to the base plate 20 via a nut 26 so as to be rotatable and adjustable.

<F> Guide pipe The guide pipe 60 has a function as a guide member when the substrate 20 is inserted, and a function of supporting the weight drop of the substrate 20 after the substrate 20 is installed. so,
The diameter of the anchor 53 is set so that the anchor 53 can be fitted. In addition, an opening 61 is formed in the peripheral surface of the guide pipe 60 to increase the adhesiveness with a solidifying material 54 described later.

[0019]

Next, a method of using the pressure bearing plate device will be described by taking the mountain retaining method as an example.

<A> Insertion of anchor As shown in FIG. 3, the anchor hole 5 is formed in the ground 50 at a predetermined inclination.
After the hole 1 is drilled, an anchor 53 with a sheath 52 is inserted into the anchor hole 51 to fill a solidifying material 54 such as mortar, and then a guide pipe 60 is externally attached to the neck of the anchor 53. Further, the planned substrate installation surface around the guide pipe 60 is repaired by the solidifying material 54 to be substantially flat.

<B> Installation of Substrate As shown in FIG. 4, after the hardening of the solidifying material 54, the hole 21 of the substrate 20 is inserted into the anchor 53 and installed on the natural ground 50.

<C> Installation / Adjustment of Transmission Member After the installation of the substrate 20 is completed, the transmission member 30 is attached as shown in FIG. That is, the floor plate 34, the adjustment washer 40, and the transmission member 30 are sequentially inserted into the anchor 53 protruding from the substrate 20 to fix the space between the floor plate 34 and the substrate 20, but for the reason described above, the transmission member 30 is the anchor. It does not always coincide with the axis of 53. Therefore, after the taper washers 41, 41 constituting the adjustment washer 40 are rotatably operated in the field so that the transmission member 30 is substantially aligned with the axial center of the anchor 53, the transmission cylinder 31 and the upper tapered washer 41.
And between the floor plate 34 and the lower taper washer 41, and
The taper washers 41, 41 are fixed by welding. The adjustment washer 40 and the floor plate 3 whose tilt angle and azimuth angle are adjusted in this way
The transmission member 30 to which 4 is connected is inserted into the anchor 53, and the floor plate 34 is temporarily fixed to the substrate 20 with the bolt 25 and the nut 26. If the adjustment washer 40 is insufficiently adjusted,
The floor plate 34 is rotated to finely adjust the inclination angle and direction angle of the transmission member 30, and when the adjustment is completed, the nut 26 is tightened and fixed.

<D> Primary tension As shown in FIG. 5, after the transmission member 30 is filled with a rust preventive material such as cement milk, the well-known anchor plate 55 and anchor head 56 are mounted on the upper transmission plate 33, The anchor 50 is tensioned and fixed by using the tension jack.
The tension force introduced to the anchor 53 is transmitted to the substrate 20 through the transmission member 30, the adjustment washer 40, and the floor plate 34 to support the natural ground 50.

<E> Secondary Tension After further completion of the primary tension, as shown in FIG. 6, the nets are buried around the pressure bearing plate device 10 and a net-type buried mold or a mold that requires a known demolding process. A rectangular concrete pressure plate 70 is built on site using the frame. At this time, the anchor head 56 is exposed on the upper surface of the concrete pressure receiving plate 70, and when the concrete pressure receiving plate 70 hardens, the anchor 53 is released.
Re-tension and settle. Since the pressure bearing plate device 10 and the concrete pressure receiving plate 70 are integrated with each other, the tension force introduced to the anchor 53 supports the ground 50 through the substrate 20 and the concrete pressure receiving plate 70.

[0025]

[Embodiment 2] In the above embodiment, the case where the tilt angle and the azimuth angle of the transmission member 30 are adjusted by the rotation operation of the adjustment washer 40 and the rotation operation of the transmission member 30 with respect to the substrate 20 has been described. You may adjust it only by the element. When adjusting by rotating the transmission member 30, the adjustment washer 40 may be composed of a single taper washer, or the adjustment washer 40 itself may be omitted, and the lower end of the transmission cylinder 31 may be directly laid by a fixed inclination angle. It may be fixed to 34.

[0026]

Third Embodiment Further, instead of the elongated hole 34 of the floor plate 32 shown in FIG. 1, a large number of bolt holes may be drilled around the opening 35 to perform the same function. Also, the substrate 20 and the floor plate 3
The rotation can be adjusted in the same manner by reversing the combination of the holes for allowing the rotation of 4 and connecting them.

[0027]

[Embodiment 4] The adjustment washer 40 includes two or more taper washers 41.
It may be configured with. In the case of this embodiment, the substrate 20
This is effective when the angle of inclination of the transmission member 30 with respect to is tight. For example, if a taper washer tilted at an average angle is fixed to the floor plate 34 and a plurality of taper washers for fine adjustment are installed thereon, the angle can be adjusted easily and accurately.

[0028]

Fifth Embodiment FIG. 7 shows another embodiment in which a plurality of protrusions 45 are provided on the inner peripheral surface of a taper washer 41 which constitutes the adjustment washer 40. The protrusion lengths of the protrusions 45 are all set to be equal, and are set to a size that allows centering when the guide pipe 60 is inserted.

[0029]

Sixth Embodiment FIG. 8 shows another embodiment in which a locking projection 46 is projected on the upper surface of the tapered washer 41. The locking projections 46 are point-shaped or annular projections for positioning the transmission cylinder 31 in alignment with the center of the tapered washer 41, and the formation position thereof is in contact with the inner peripheral surface or the outer peripheral surface of the transmission cylinder 31. Protrude in a possible position. By providing the protrusion 46, the positioning of the transmission cylinder 31 and the taper washer 41 can be facilitated, and the transmission cylinder 31 can be prevented from slipping off from the inclined taper washer 41 before being fixed. Further, as shown in FIG. 9, the upper portion of the locking projection 47 provided on the inner peripheral surface of the hole 42 of the taper washer 41 is projected from the upper surface of the taper washer 41, and the locking projection 46 is placed inside the hole 42. When it is projected to the position, both functions of positioning the transmission cylinder 31 and centering the guide pipe 60 (anchor) can be provided.

[0030]

[Embodiment 7] Although Embodiment 1 has explained the case where the concrete pressure receiving plate 70 is built and subjected to the secondary tension, when the required supporting force of the natural ground 50 is relatively large, only the primary tension is sufficient. Good.

[0031]

[Embodiment 8] In each of the embodiments described above, the guide pipe 60 may be omitted.

[0032]

[Embodiment 9] After fixing the floor plate 34 and the adjustment washer 40 to the substrate 20, the guide pipe 60, the adjustment washer 40, and the floor plate 34 are provided.
By filling the gap with the substrate 20 with a filling material such as a waterproofing agent, a water blocking agent, an anticorrosive material, or a solidifying material, it is possible to effectively prevent infiltration of groundwater or the like into the transmission member 30.

[0033]

[Embodiment 10] When the anchor sheath 52 is not used, a spacer for properly maintaining the distance between the guide pipe 60 and the anchor 53 may be used.

[0034]

Since the present invention is as described above, the following effects can be obtained.

<A> Since the inclination angle and azimuth angle of the transmission member that is attached to be inclined with respect to the substrate can be easily adjusted, the misalignment of the anchor can be eliminated. Therefore, the yield strength of the anchor is reduced and there is no risk of the anchor breaking.

<B> By rotating the adjustment washer or rotating the transmission member with respect to the board, or both of these operations,
Since the misalignment of the anchor axis can be eliminated, the adjustment work does not require much labor, and the construction can be speeded up, and the adjustment range of the anchor axis is wide.

<C> The misalignment of the anchor can be corrected at a position close to the natural ground side. Therefore, there is no deviation due to the weight of the pressure receiving plate, and no deviation due to installation error in installation.
That is, since the concrete pressure receiving plate is manufactured after fixing the anchor, the anchor shaft is not displaced due to the displacement due to the production or the weight of the pressure receiving plate.

<D> It can be applied to the base of a normal earth anchor and is versatile.

<E> In addition to the guide pipe attached to the anchor functioning as a guide member when the board is inserted, the guide pipe has a function of preventing the pressure bearing plate device from lowering due to its own weight, thereby improving the construction accuracy and smoothing the construction. Can be achieved.

<F> By providing a protrusion on the inner peripheral surface of the adjustment washer, centering with the guide pipe (anchor shaft) can be easily performed.

<G> The transmission member can be accurately installed at a predetermined position by providing the locking projection by projecting it from the upper surface of the adjustment washer.

<H> By installing the guide pipe attached to the anchor, it is possible to prevent the concrete pressure receiving plate from dropping due to its own weight when the anchor is cut or when the anchor is re-tensioned.

[Brief description of drawings]

FIG. 1 Exploded view of pressure bearing plate device

FIG. 2 is a vertical sectional view of an anchor head in which a bearing plate device is attached to the anchor.

FIG. 3 is a vertical sectional view of an anchor head in which a guide pipe is attached to the anchor.

FIG. 4 is a vertical sectional view of an anchor head in which a substrate is attached to the anchor.

FIG. 5 is a vertical cross-sectional view of the anchor head that has completed fixing (primary tension).

FIG. 6 is a vertical cross-sectional view of an anchor head on which a concrete pressure receiving plate is built integrally with a pressure bearing plate device and fixing (secondary tension) is completed.

FIG. 7 is an explanatory view of an embodiment in which a protrusion is provided inside the adjustment washer.

FIG. 8 is an explanatory view of an embodiment in which a protrusion is provided on the upper surface of the adjustment washer.

FIG. 9 is an explanatory diagram of an embodiment in which a protrusion is provided on the upper surface of the adjustment washer.

FIG. 10 is a conceptual diagram of anchor technology on which the present invention is based.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kihei Takeda 1-2-13 Negishi, Taito-ku, Tokyo Katsumura Construction Co., Ltd.

Claims (14)

[Claims] 1. A support plate for a ground anchor interposed between a tension end of an anchor fixed in the ground and a ground, a substrate capable of inserting the anchor in contact with the ground, and the substrate A pressure bearing plate device for a ground anchor, which is composed of a tubular transmission member that is attached via a constant inclination angle. 2. A support plate for a ground anchor interposed between a tensioned end of an anchor fixed in the ground and a ground, a substrate capable of inserting the anchor in contact with the ground, and It is interposed between the cylindrical transmission member that supports the tension force of the anchor and transmits the tension force to the substrate, and the substrate and the transmission member, and imparts a constant inclination angle to the substrate. A bearing plate device for a ground anchor that is composed of an adjustment washer. 3. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, and A cylindrical transmission member that supports the tension force of the anchor by separating it and transmits this tension force to the substrate, an adjustment washer that is interposed between the substrate and the transmission member, and an anchor that protrudes from the ground, and is mounted on the anchor. A guide pipe that is inserted into the substrate,
Bearing plate device for ground anchor. 4. A support plate for a ground anchor interposed between a tension end of an anchor fixed in the ground and a ground, a substrate capable of inserting the anchor in contact with the ground, and the substrate A pressure bearing plate device for a ground anchor, comprising a tubular transmission member attached at a constant inclination angle, and the transmission cylinder being rotatably attached to a substrate. 5. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, and It is interposed between the cylindrical transmission member that supports the tension force of the anchor and transmits the tension force to the substrate, and the substrate and the transmission member, and imparts a constant inclination angle to the substrate. A support plate for a ground anchor, comprising an adjusting washer, and the transmission cylinder being rotatably attached to a substrate. 6. A support plate for a ground anchor interposed between a tensioned end of an anchor fixed in the ground and a ground, a substrate capable of inserting the anchor in contact with the ground, and A cylindrical transmission member that supports the tension force of the anchor by separating it and transmits this tension force to the substrate, an adjustment washer that is interposed between the substrate and the transmission member, and an anchor that protrudes from the ground, and is mounted on the anchor. A pressure bearing plate device for a ground anchor, comprising a guide pipe inserted through the substrate, and the transmission cylinder being rotatably attached to the substrate. 7. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, and the substrate It is composed of a cylindrical transmission member that is attached through a certain angle of inclination, and a floor plate provided at the bottom of the transmission cylinder and a board are combined with an elongated hole of circular arc diameter and a bolt hole that are concentric with each other. A pressure bearing plate device for a ground anchor, characterized in that a transmission cylinder is configured to be rotatable by screwing a bolt inserted into a hole. 8. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, and It is interposed between the cylindrical transmission member that supports the tension force of the anchor and transmits the tension force to the substrate, and the substrate and the transmission member, and imparts a constant inclination angle to the substrate. Composed of an adjustment washer, a floor plate provided at the bottom of the transmission tube and a base plate are combined with an elongated hole of circular arc diameter bored concentrically on each of the concentric circles and a bolt hole, and the bolts inserted into both holes are screwed into it. A bearing plate device for a ground anchor, wherein the transmission cylinder is configured to be rotatable. 9. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, A cylindrical transmission member that supports the tension force of the anchor by separating it and transmits this tension force to the substrate, an adjustment washer that is interposed between the substrate and the transmission member, and an anchor that protrudes from the ground, and is mounted on the anchor. A bolt that is composed of a guide pipe that is inserted through the board, and a base plate that is provided in the lower part of the transmission cylinder, and a long hole of circular arc diameter and a bolt hole that are drilled concentrically on the board, respectively, and that are inserted through the holes. A pressure bearing plate device for a ground anchor, characterized in that the transmission cylinder is configured to be rotatable by screwing. 10. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, and It is interposed between the cylindrical transmission member that supports the tension force of the anchor and transmits the tension force to the substrate, and the substrate and the transmission member, and imparts a constant inclination angle to the substrate. An adjustment washer, wherein the adjustment washer is a laminated body of a plurality of taper washers, and the taper washer can be rotated to correct the axial displacement of the anchor. Pressure plate device. 11. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and a ground, a substrate capable of inserting the anchor in contact with the ground, A cylindrical transmission member that supports the tension force of the anchor by separating it and transmits this tension force to the substrate, an adjustment washer that is interposed between the substrate and the transmission member, and an anchor that protrudes from the ground, and is mounted on the anchor. A guide pipe that is inserted into the substrate, the adjustment washer is a stack of a plurality of tapered washers, and the axial displacement of the anchor can be corrected by rotating the tapered washer. A bearing plate device for a ground anchor. 12. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, and It is interposed between the cylindrical transmission member that supports the tension force of the anchor and transmits the tension force to the substrate, and the substrate and the transmission member, and imparts a constant inclination angle to the substrate. An adjustment washer, the transmission cylinder is rotatably attached to the substrate, the adjustment washer is a stack of a plurality of taper washers, and the taper washer is rotated to operate the anchor. A bearing plate device for a ground anchor, which is configured to be able to correct an axis deviation. 13. A ground anchor bearing plate device interposed between a tensioned end of an anchor fixed in the ground and the ground, a substrate capable of inserting the anchor in contact with the ground, A cylindrical transmission member that supports the tension force of the anchor by separating it and transmits this tension force to the substrate, an adjustment washer that is interposed between the substrate and the transmission member, and an anchor that protrudes from the ground, and is mounted on the anchor. A guide pipe that is inserted into the substrate, the transmission cylinder is rotatably attached to the substrate, the adjustment washer is a stack of a plurality of taper washers, and the taper washer is rotated. A bearing plate device for a ground anchor, characterized in that the axial displacement of the anchor can be corrected. 14. The ground anchor pressure-bearing plate device according to claim 2, wherein a plurality of protrusions for adjusting the axial center of the anchor are provided on the inner peripheral surface of the adjustment washer. Bearing plate device for anchors.