JP3325470B2 - Anchor method and anchor pressure plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchoring method. The present invention also relates to an anchor pressure receiving plate used in the anchoring method.

[0002]

2. Description of the Related Art Japan has a mountainous terrain, many slopes adjacent to residential areas and agricultural lands, and there are many areas where serious damage is likely to occur due to slope collapse or landslides.
Therefore, an anchor method is known as an effective method for preventing slope collapse and landslide. What is the anchor method?
An anchor is installed on a solid rock without danger of collapse, an anchor connecting member such as a PC steel wire is pulled out to the ground from this anchor, and this anchor connecting member is connected to an anchor pressure receiving plate provided on the ground surface, and the ground surface is anchored. The ground is held by pressing with a pressure receiving plate. In the conventional anchoring method, the anchor pressure receiving plate completed in the factory is transported to the anchor burying position and connected to the anchor connecting member.

[0003] By the way, as the anchor pressure receiving plate used in the anchoring method, those made of reinforced concrete have long been used. However, the reinforced concrete anchor pressure plate has a disadvantage that the weight is extremely large and a large-sized civil engineering construction machine is indispensable for installation. Further, the anchor pressure receiving plate made of reinforced concrete has a problem that cracks easily occur. In order to solve these problems, the present inventors have proposed an anchor pressure receiving plate made of fiber reinforced resin (Japanese Patent Laid-Open No. 6-108456).

[0004]

The anchor pressure receiving plate proposed by the present inventors is much lighter than that made of reinforced concrete, and is much easier to transport and install than in the past. However, there is a need among those skilled in the art to develop an anchor construction method that makes transport and installation of the anchor pressure plate easier, and an anchor pressure plate that is easier to transport. In other words, in places where the anchor method is used, it may be difficult to enter large-scale civil engineering and construction machinery due to reasons such as steep slopes and narrow roads around the road. Install anchor pressure plates in such places. In order to do this, the anchor pressure plate must be carried in manually. In such a place, it is necessary to manually move the positioning of the anchor pressure receiving plate. Here, although the prior art anchor pressure plate is reduced in weight, it is too heavy to be transported manually. Therefore, in the prior art, it is difficult to use the anchoring method in such a place, and there has been no other method than to prevent the slope from collapsing by other methods or to leave the slope at risk of collapse.

Further, it is conceivable to carry the anchor pressure receiving plate, which is a laminate, to a construction site in a state of plates constituting each layer, and to bond and laminate the plates at the construction site. And because the plate body slips down,
It was difficult to stack each plate in a regular positional relationship. Further, it is difficult to completely bond the respective plates in such an environment, and in many cases, the anchor pressure receiving plate joined at the construction site lacks the integrity of the plates and does not exhibit the design strength. The present invention focuses on the above-mentioned problems of the prior art, and proposes a new anchor construction method, thereby making it possible to prevent the collapse by the anchor construction method even in a place where the conventional technique could not cope. It is assumed that. The present invention also proposes an anchor pressure receiving plate that is easier to carry.

[0006]

According to a first aspect of the present invention, there is provided an anchor pressure receiving plate in which a plurality of plate members are bonded and laminated, and an anchor buried underground. In an anchoring method of connecting with an anchor connecting member and holding down a ground surface, a pipe body having a screw formed at least at an upper end portion is erected on a plate body laminated on a lower layer of the anchor pressure receiving plate and laminated on the lower layer. A through-hole is provided in the plate body laminated on the upper part of the plate body, and the plate body laminated on the lower layer is installed on the anchor embedding position in a state where the anchor connecting member is inserted into the pipe, and the plate body is laminated on the upper part. The plate bodies are sequentially laminated by inserting a through hole through the tube body with an adhesive interposed therebetween, and a female screw member is attached to the upper end of the tube body to fasten the plate bodies to bond and laminate the plate bodies. An anchor method characterized by That.

A second aspect of the present invention is to achieve the same object.
According to the invention described in the above, an anchor pressure receiving plate in which a plurality of plate bodies are bonded and laminated, and an anchor buried in the ground are connected by an anchor connecting member, and an anchor method for holding down the ground surface, the lower layer of the anchor pressure receiving plate A pipe body provided with a screw hole in the plate body laminated on the bottom, a through-hole provided in a plate body laminated on the plate body laminated on the lower layer, and a screw formed at least in the vicinity of both ends of the outer periphery The body is fixed with screws in the screw holes provided in the plate body laminated on the lower layer, and the pipe body is erected on the plate body laminated on the lower layer, and the plate is connected with the anchor connecting member inserted through the pipe body. The body is placed on the anchor embedding position, the plate body laminated on the upper part is inserted in the through hole through the tube with the adhesive interposed, and sequentially laminated, and a female screw member is provided at the upper end of the tube body. Attach and tighten the plate, and after the bonding is completed And then removing the tube, a Anchorages characterized by coupling the anchor connecting member and the anchor the pressure receiving plate.

[0008] In contrast to the prior art anchor method in which an anchor pressure plate completed at a factory is transported to a construction site, the above two inventions disclose the anchor pressure plate in the form of a semi-finished product at the construction site. At the construction site to complete the anchor pressure plate. That is, claim 1
In the anchoring method described in (1), a plate body constituting each layer and a pipe body having at least one end formed with a screw are transported to a construction site. The pipe body may be carried in a state of being erected in advance on a plate body laminated on the lower layer. Then, at the construction site, a plate to be laminated as a lower layer is arranged at a position where the anchor is buried, and a pipe is connected to this plate. In the case where the pipe is carried in a state where the pipe body is erected in advance as described above, the plate layered as a lower layer is placed at the anchor burying position as it is.
Also, the anchor connecting member is inserted through the above-mentioned tube.

[0009] Then, an adhesive is applied to a required portion, and the plate is sequentially laminated by inserting the tube into a through hole of the plate laminated on the upper layer. For this reason, even in the case of a sloping ground, the plate members of the upper layer portion do not shift and fall, and the plate members can be stacked with a regular positional relationship. And in this invention, since a female screw member is attached to the upper end part of a pipe body, a board body is tightened and a board body is adhered and laminated | stacked, even a construction site can perform perfect adhesion of each layer. Further, as described above, since the anchor connecting member is inserted into the pipe in advance, the anchor connecting member and the anchor pressure receiving plate can be connected by a known method, and curing of the inclined surface by the anchor method can be completed. it can.

[0010] The invention according to claim 2 is suitable when it is necessary to remove the pipe prior to the connection between the anchor connecting member and the anchor pressure receiving plate. That is, in the anchoring method according to the second aspect, a screw hole is provided in the plate body laminated below the anchor pressure receiving plate, and the pipe body is erected on the plate body by screw fitting. Also in the invention according to claim 2, the anchor connecting member is inserted through the above-described tube body in the same manner as the invention according to claim 1 described above, and the plate body to be laminated on the upper layer is formed with the through hole of the plate body. The sheets are inserted into the tube and laminated sequentially, the female screw member is attached, the plates are tightened, and the plates are bonded and laminated. In the invention according to claim 2,
After the female screw member is attached and the plate member is tightened to bond the plate member, the female screw member is removed. When the female screw member is removed, the upper part of the tube protrudes from the laminated plate. Therefore, when the protruding portion is gripped by a jig or the like and rotated, the fitting of the screw to the plate laminated on the lower layer is released, so that the tube can be pulled out.

The invention according to claim 3 is an improvement of the above two inventions, wherein a plate constituting an anchor pressure receiving plate is formed of a fiber reinforced resin,
3. The anchoring method according to claim 1, wherein the plate bodies are sequentially stacked in order of increasing area and decreasing in area.

A fourth aspect of the present invention is an improvement of the above-described aspect, wherein a bolt is inserted into a plate constituting an anchor pressure receiving plate together with the tube. An anchor method according to any one of Items 1 to 3.

[0013] In the anchor method of the present invention, in addition to the fastening by the pipe, the connection by screws is also performed, so that the connection between the layers is stronger.

[0014]

Embodiments of the present invention will be described below. FIG. 1 is a cross-sectional view illustrating an anchor method according to an embodiment of the present invention. FIG. 2 is an exploded cross-sectional view showing the anchor pressure receiving plate joining process in the anchor method according to the embodiment of the present invention. FIG. 3 is a sectional view showing the anchor pressure receiving plate in the anchor method according to the embodiment of the present invention, in a state where each layer is integrally fastened. FIG. 4 is a cross-sectional view illustrating the anchor pressure receiving plate in the anchor method according to the embodiment of the present invention, in a state where the pipe is removed. FIG.
1 is a perspective view showing an anchor pressure receiving plate in an anchor method according to an embodiment of the present invention.

The anchoring method of the present invention starts by excavating the slope 1 (see FIG. 1) of the sloped land and forming the excavation hole 4 reaching the solid rock 3 beyond the slide line 2 as in the prior art. Is done. Then, an anchor connecting member 5 such as a PC steel wire is inserted into the excavation hole, and a distal end portion of the anchor connecting member,
That is, a grout material such as cement is filled in a portion inside the bedrock 3 and the portion is fixed to the bedrock 3 to form the anchor 6.

The other end of the anchor connecting member 5 is drawn out to the ground surface. Subsequently, the anchor pressure receiving plate 10 is installed in the relevant portion. The material of the anchor pressure receiving plate is the same as that of the prior art, and a fiber reinforced resin is used. As the fiber for reinforcing the resin, for example, inorganic fibers such as glass fiber, carbon fiber, metal fiber, and ceramic fiber, and organic fibers such as aromatic polyamide fiber can be used. Among the above fibers, the use of glass fiber is most recommended from the viewpoint of strength and economy. The form of fiber is yarn, cloth,
A long fiber form such as roving, roving cloth and cross mat is suitable, and if necessary, short fibers such as chips and middle fibers and hollow fillers such as milk balloons may be used in combination.

As the resin, a thermosetting resin is used, and a resin which forms a hard foam is particularly preferable. Specific types of resins include, for example, hard urethane resins, unsaturated polyester resins, epoxy resins, and the like. The most suitable material for the anchor pressure receiving plate is a foam in which hard urethane resin is reinforced with long glass fibers (for example, Eslon Neo-Lumber FFU manufactured by Sekisui Chemical Co., Ltd.).

The installation method and mechanical structure of the anchor pressure receiving plate 10 are the most important points of the present invention and will be described in detail. What should be particularly noted in the anchoring method of the present embodiment is that the plates 11, 12, 13, 14, 15 constituting each layer.
Is to be carried into the construction site in a separate state. In the anchor method according to the present embodiment, the plate members 11 and 1
2, 13, 14, 15, the pipe 17 and the female screw member 2
0 and seat 19 are used. In the present embodiment,
An anchor pressure receiving plate 10 laminated on a cruciform plate made of fiber reinforced resin is installed. The anchor pressure receiving plate 10 has a five-layer structure, and the plate bodies 11, 12, 13, 14, 15 constituting each layer have a smaller area as going upward. Each layer is laminated such that the orientation directions of the fibers of the adjacent layers are orthogonal. However, it is desirable that the plate member (referred to as a pedestal) 15 to be laminated on the uppermost side is one in which relatively short fibers are randomly inserted.

In this embodiment, each of the plates 11, 1
2, 13, 14, and 15 have 2 through holes at the center.
1, 22, 23, 24 and 25 are provided. However, a counterbore 30 is formed on the bottom surface of the lowermost plate body 11. The steel plate 31 provided with the female screw 34 is integrally attached to the counterbore 30 by a screw 33, and the through hole 21 of the plate body 11, which is the lowest layer, is a screw hole. In addition, the steel plate 31 attached to the counterbore 30
Can be replaced with a threaded flange for the tube. The lowermost plate body 11 is provided with a prepared hole 35 at a predetermined position. Plate 1 constituting intermediate layer
2, 13, 14 are provided with screw insertion holes 36, 37, 38 near the ends of the respective crosses.

The pipe 17 is, for example, an SGP (gas pipe) and has screws 45 and 46 at both ends. The female screw member 20 is specifically a nut.

In the anchoring method according to the present embodiment, the plates 11, 12, 13, 14, 15 are carried into the construction site in a separated state as described above, and the lowermost plate 11
Is installed on the anchor 6 at the embedded position. More specifically, the plate 11 is positioned by aligning the through hole (screw hole) 21 of the plate 11 with the excavation hole 4. Anchor connecting member 5
Is drawn out from the through hole (screw hole) 21 to the outside. Then, the screw 46 of the pipe member 17 is screwed into the through hole (screw hole) 21 of the plate body 11, and the pipe member 17 is erected perpendicularly to the plate body 11. At this time, the anchor connecting member 5
On the other end side, the tube member 17 is inserted and pulled out from the tube member 17.

Subsequently, an adhesive (not shown) is applied to the surface of the plate 11. Then, the second plate 12 from the bottom is placed on the plate 11. Here, the pipe member 1 is attached to the lowermost plate 11.
7, the second plate 12 is provided with a through-hole 22 at the center, so that when the through-hole 22 is inserted through the tube 17, the plate 12 Can be used as guides so that the center positions match. After the plates 12 are stacked, a screw (coach screw) 50 is inserted into the screw insertion hole 36 to fix the plate 12 to the plate 11. Thereafter, the plates 13 and 14 are sequentially stacked by the same means, and a screw (coach screw) 50 is inserted into the screw insertion hole 37.
Then, the plate bodies 13 and 14 are fixed to the plate bodies 11 and 12 by passing through the hole 38. The plate 15 is bonded to the uppermost part.

Then, a tube 17 protruding from the plate 15 is
The female screw member 20 is attached via the washer 19, and the female screw member 20 is tightened.
The central portions of 13, 14, 15 are strongly tightened to each other.
In this state, the plates 11, 12, 13, 1
Wait for the 4,15 adhesive to cure. When the curing of the adhesive is completed, the female screw member 20 and the washer 19 are removed. Subsequently, the tip of the tube 17 is grasped by a predetermined jig or a pipe wrench or the like, and the tube 17 is rotated in the loosening direction of the screw. As a result, the screw 46 at the lower end of the tube 17 and the screw 34 of the plate 11 are released, and the tube 17 can be pulled out. FIG. 4 shows a state in which the pipe body 17 has been pulled out. The other end of the anchor connecting member 5 is inserted through the through hole 52. It is desirable that the screw (coach screw) 50 be left attached. In addition, there is no method of taking out the steel plate 31 provided on the bottom of the plate body 11, and the steel plate 31 remains in the mounted state. However, no particular problem occurs.

The subsequent steps are the same as those in the prior art, and the anchor pressure receiving plate 10 and the anchor connecting member 5 are connected by known means.

In the above embodiment, the plates 11, 1
2, 13, 14, and 15 exemplify a cross shape, but the present invention is not limited to this shape, and the plate body may be any shape such as a square or a rectangle.
However, since it is expected that the present invention is often used when it is difficult to enter a crane or the like and the anchor pressure receiving plate must be carried into the construction site manually, the weight of the plate is reduced. Moreover, a cross-shaped member that can suppress a large area of the ground is considered to be most suitable for the present invention.

In the above-described embodiment, the screw hole 21 is formed by screwing the steel plate 31 provided with the female screw 34 to the lowermost plate 11. The method of forming the screw holes 21 by attaching the metal plate to the plate body 11 as described above is a recommended configuration because the screw holes have high rigidity. However, as a simpler method, a method of directly threading the plate body 11 is also possible. The plate body provided with the screw holes 21 is usually located at the lowermost layer. However, in some cases, the plate body of the lowermost layer is provided with a through hole (a stupid hole), and the second step, or A screw hole for screwing the tube 17 may be provided in the third plate.

Further, in the above-described embodiment, a measure for removing the pipe 17 has been exemplified. However, the anchor pressure receiving plate 10 and the anchor connecting member 5 may be connected with the pipe 17 remaining. However, in general, it is desirable that the surface of the anchor pressure receiving plate 10 is smooth, and that the pipe 17 and the female screw member 20 may be rusted. When only the effect of loading the anchor pressure receiving plate is sufficient, a round bar is used in place of the tube 17 and the round bar is used as a core and the plates 11, 12, 13, and 1 are used.
4, 15 may be combined.

[0028]

EXAMPLE A cross-shaped anchor pressure plate 10 as shown in FIG. 5 was made from a foam (trade name: Eslone Neo-Lumbar) made of hard urethane resin reinforced by long glass fiber manufactured by Sekisui Chemical Co., Ltd. However, its total weight is 26
It was 6 kg. It is extremely difficult for an operator to carry the anchor pressure receiving plate 10 having this weight and climb the inclined surface. Next, as an example of the present invention, a plate body of each stage was separately carried, and a similar anchor pressure receiving plate 10 was made at a construction site. The weight of each stage at this time was as follows, and it was possible to carry in manually.

[0029]

[Table 1]

[0030]

According to the anchoring method of the present invention, the anchor pressure receiving plate can be transported for each layer, so that the anchor pressure receiving plate can be carried in narrow places where civil engineering equipment cannot pass or steep slopes. is there. Also, the positioning of the anchor pressure receiving plate can be performed for each layer in the anchor method according to the present invention, and thus can be performed manually. Therefore, the anchoring method can be used even in a place where it is necessary to abandon the adoption of the anchoring method in the related art, and there is an excellent effect that contributes to prevention of collapse of the sloped land. Also, in the case where the anchor pressure receiving plate is carried in using a civil engineering machine, in the case of the present invention, there is an effect that a small civil engineering machine is sufficient. ADVANTAGE OF THE INVENTION The anchor pressure receiving plate of this invention has the effect that the adhesion | attachment lamination of a plate body is possible also in an incline, such as a construction site.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an anchor method according to an embodiment of the present invention.

FIG. 2 is an exploded cross-sectional view illustrating a joining step of an anchor pressure receiving plate in the anchor method according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the anchor pressure receiving plate in the anchor method according to the embodiment of the present invention, in a state where each layer is integrally fastened.

FIG. 4 is a cross-sectional view showing the anchor pressure receiving plate in the anchor method according to the embodiment of the present invention, in a state where the pipe is removed.

FIG. 5 is a perspective view showing an anchor pressure receiving plate in the anchor method according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Slope 5 Anchor connection member 6 Anchor 10 Anchor pressure receiving plate 11 Plate body 12, 13, 14, 15 plate 17 which becomes the lowest layer 17 Tube body 20 Female screw member 21 Through hole (screw hole) 31 Steel plate 34 Female screw

Claims (5)

(57) [Claims] 1. An anchor method in which an anchor pressure receiving plate in which a plurality of plate bodies are bonded and laminated and an anchor buried in the ground is connected by an anchor connecting member to hold down the ground surface, at least a screw is provided at an upper end portion. The formed tube is
The plate body stacked on the lower layer of the anchor pressure receiving plate is erected, and the plate body stacked on the plate body stacked on the lower layer is provided with a through hole, and the anchor connecting member is inserted into the pipe. In the state, the plate to be laminated on the lower layer is installed on the anchor embedding position, and the plate to be laminated on the upper part is sequentially laminated by inserting through holes into the tube with an adhesive interposed therebetween, and the tube is A female screw member is attached to the upper end of the slab, and the plates are tightened to bond and laminate the plates together. 2. An anchor method in which an anchor pressure plate in which a plurality of plate bodies are bonded and laminated and an anchor buried in the ground is connected by an anchor connecting member to hold down the ground surface, and the anchor pressure plate is provided below the anchor pressure plate. A tube body provided with a screw hole in the plate body to be laminated, a through-hole in the plate body laminated on the plate body laminated in the lower layer, and a screw formed at least in the vicinity of both ends of the outer periphery. Is fixed to the screw hole provided in the plate body laminated on the lower layer, and a pipe body is erected on the plate body laminated on the lower layer while the anchor connecting member is inserted through the tube body. Is installed on the anchor embedding position, the plate body laminated on the upper part is sequentially laminated by inserting the through hole into the tube body with the adhesive interposed, and a female screw member is attached to the upper end of the tube body And tighten the female body after the bonding is completed. An anchoring method comprising removing a pipe and a pipe body and connecting an anchor connecting member and an anchor pressure receiving plate. 3. A plate constituting the anchor pressure receiving plate is formed of a fiber reinforced resin, and the plates are sequentially stacked in order of increasing area and decreasing in area. Item 3. An anchor method according to item 1 or 2. 4. The anchoring method according to claim 1, wherein a bolt is inserted into the plate constituting the anchor pressure receiving plate together with the tube. 5. An anchor pressure receiving plate in which a plurality of plate members are adhered and laminated, wherein one end of a core member having a thread formed at least in the vicinity of both ends on the outer periphery is fixed to the plate member laminated on the lower layer. Standing up, a through-hole is provided in the plate body laminated on the upper part of the plate body laminated on the lower layer, the plate body laminated on the upper part is laminated with the through hole inserted through the core, An anchor pressure receiving plate, wherein a female screw member is attached to an upper end portion of the core body.