JPS6133090B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bearing plate auxiliary mat for an anchor.

Conventionally, anchors used for protection of slopes during tunnel construction and foundation excavation work such as root cutting have been installed directly on the ground surface and used as bearing plates. Because mountains are often excavated by blasting, the surface of the mountain has large irregularities, and the bearing plate and the bearing plate and fixing nuts often do not come into perfect contact with the surface of the mountain. In addition, in foundation excavation work, anchors are rarely installed at right angles to the ground surface, and bevel washers with a predetermined inclination angle are prepared in advance, but in many cases they do not blend well with the ground surface. For this reason, bending stress is applied to the anchor, and the load is applied to a part of the rock and it becomes a point support, causing a concentrated load on a part of the plate, which may cause the ground to collapse and cause the anchor to loosen. Become.

In order to solve the above-mentioned drawbacks, the present invention provides a bearing plate auxiliary mat for anchors, which is made of fibers with dewatering properties that promote the rapid hardening of concrete of approximately the same size or shape as the bearing plate. After a bag-shaped auxiliary mat made of wood with a predetermined thickness is installed between the ground surface and the bearing plate, a solidifying agent of expandable material such as mortar resin or aluminum powder is injected, or it is expanded in advance. By soaking a bag-shaped auxiliary mat injected with a solidifying agent made of a flexible material between the ground surface and the bearing plate, the material is self-expanding and can be used to connect the bearing plate to the ground surface. It fully adapts to the changes in the unevenness of the
It is something that makes you feel close to each other. Furthermore, it is possible to adjust the gel time by mixing an accelerating agent into the setting agent, and the shape of the auxiliary mat is not particularly limited, such as arcuate or rectangular, as long as it is compatible with the shape of the bearing plate. It is also possible to use various modifications without having to do so.

Next, embodiments of the present invention will be described based on the drawings.

1A and 1B show a bearing plate auxiliary mat for an anchor according to the present invention. FIG. 1A is a perspective view of an on-site filling auxiliary mat 1, which is made of a fiber material (for example, sackcloth Tetron 6-E) having dewatering properties that promotes quick hardening of concrete.
30 pieces x 25 pieces, or Tetoron cotton cloth 10-e x 60 pieces
40 etc.) are sewn into a bag shape, and an anchor insertion hole 2 is provided approximately in the center, and a protrusion 4 having an injection port 5 is sewn to a part of the periphery.
This auxiliary mat 1 is installed between the ground surface and the bearing plate, and after injecting an expandable solidifying agent from the injection port 5 at the site, the opening is fastened with a string or clip to prevent it from flowing out. It is something.

FIG. 1B shows a bag-shaped auxiliary mat, which is different from the one shown in FIG. As described below, the inflatable material is sealed in advance, and the seal is opened at the site and thoroughly immersed in water before being installed between the ground surface and the bearing plate. It is something. Also, the auxiliary mat 1 in Fig. 1B is also
Similarly, an anchor insertion hole 2 is provided approximately in the center. In this way, the auxiliary mats 1 packed in bags with the solidifying agent are sealed one by one with plastic material or the like to prevent the solidifying agent from drying out, making it convenient to transport and hold. You can use it after soaking it thoroughly. The auxiliary mat 1 according to the present invention is made of a fiber material with dehydration properties, has flexibility, and easily conforms to the unevenness of the ground surface.
It also has the strength to not be damaged by contact with the ground.
Moreover, since the injected solidifying agent is a self-expanding material, it is possible to sufficiently adhere to the tightening nut or the rock.

2 to 6 show construction examples according to the present invention. FIG. 2 shows an example in which the auxiliary mat 1 of the present invention is installed between the ground surface 6 and the bearing plate 7, and the tightening nut 8 of the anchor 9 and the bearing plate 7 can be fastened at right angles.

Figure 3 shows an example of construction using the underground wall earth retaining method, where Figure A shows the situation where earth anchors are used and Figure B shows the situation where lining is used.

Figure 4 shows an example of construction using the steel sheet pile earth retaining method, where Figure A shows the situation where earth anchors are used and Figure B shows the situation where lining is used.

Figure 5 shows an example of construction using the H-shaped steel main pile earth retaining method.
Drawing A shows the situation where the earth anchor is used,
Figure B shows a situation in which the lining is used.

Figure 6 shows an example of construction using the column pile earth retaining method, where Figure A shows a situation where an earth anchor is used, and Figure B shows a situation where a lining is used.

In this invention, since a dehydrating fiber material is used for the bag-shaped auxiliary mat, it is easy to separate water and air from the expandable consolidation agent when anchoring, and since the consolidation agent is an expandable material, It has good adhesion to the anchor and provides optimal tension conditions as an anchor. In addition, in this invention, by providing an injection port in a part of the peripheral edge of the auxiliary mat or in the protrusion, it is possible to use the setting agent by filling it on-site from the injection port in the protrusion.
It is also possible to use it as a bearing auxiliary mat for an anchor by injecting a curing agent in advance from a part of the injection port on the peripheral edge. In addition, when it is desired to obtain strength quickly, an accelerating agent is added to the solidifying agent 4 to adjust the gel time.

[Brief explanation of the drawing]

FIGS. 1A and 1B show an auxiliary mat for on-site packing and bagging according to the present invention, and FIGS. 2 to 6 show various construction examples of the present invention. 1...Auxiliary mat, 2...Anchor insertion hole,
3, 5...Injection port for solidifying agent, 4...Protrusion, 6...
...Mound surface, 7... Bearing plate, 8... Nut, 9... Anchor.

Claims (1)

[Claims] 1 In addition to providing an anchor insertion hole in the center,
A bearing for an anchor, which is a bag-shaped auxiliary mat having a predetermined shape and size made of a dehydrating fiber material with an injection port provided in a part of the periphery, and in which an expandable solidifying agent is injected through the injection port. Plate auxiliary mat.