JPH0826581B2 - Abrasion resistant concrete structure for sewerage facilities - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is for concrete provided for protecting a concrete structure in a portion where sewage falls from a high place such as a confluence hole of a sewerage facility or a head drop construction from abrasion. Abrasion resistant plate structure.

[Conventional technology]

Many sewerage facilities are constructed of concrete,
In order to prevent wear erosion of concrete, it is usually designed to keep the flow rate of sewage within 3 m / sec. However, when laying a pipe in an area with a topographical difference in height, there is no choice but to provide a confluence hole, a drop hole, etc. It is necessary to provide concrete protection measures.

As such protection means, conventionally, a method has been adopted in which stones, stainless steel plates, rubber plates containing iron plates, etc. are stretched over such human holes as wear resistant plates for concrete. FIG. 3 shows an example in which a rubber plate containing an iron plate is used. FIG. 3 (a) is a plan view showing the human hole 1 with the upper part removed, FIG. 3 (b) is a cross-sectional view taken along the line AA of FIG.
Is a sectional view taken along the line BB in FIG. 3 (a), FIG. 3 (d) is a development view of the rubber plate containing an iron plate, and FIG. 3 (e) is a partial enlargement of the rubber plate containing an iron plate near the fixing member insertion hole. It is a side sectional view.

In FIG. 3, an iron plate is formed by covering the surface of an invert portion having a semicircular cross section that connects the pipe lines 2 and 3 having a drop in the human hole 1.
A rubber plate 4 containing 4a is stretched, and the rubber plate 4 containing an iron plate is fixed to a concrete structure in the invert portion by a fixing member (not shown) such as a hole anchor. The iron plate-containing rubber plate 4 has a shape corresponding to the shape of the invert portion to which it is attached. However, it is difficult to cut the iron plate-containing rubber plate at the construction site, so the shape of each invert portion is changed. Based on this, the development drawing shown in Fig. 3 (d) is created for each human hole by design calculation, and a rubber plate containing an iron plate is created in advance at the factory according to the shape of this development hole so that it can be brought into the human hole and stretched. I have to.

[Problems to be Solved by the Invention]

In the conventional wear-resistant plate structure for concrete,
As mentioned above, a development plan is individually designed for each human hole, and a rubber plate containing an iron plate is created at the factory according to it, and brought to the site, but it is necessary to make a design calculation for each human hole. It takes time to complete, and even if the rubber plate containing the iron plate is cut or bent in accordance with the development drawing to form it into a predetermined shape through the labor-intensive process, it may be due to errors in the installation of the pipe at the construction site. Actually, there is a problem that it is not fitted exactly to the invert part and the mounting finish is often not clean.

The present invention has been made in consideration of the problems of the conventional wear-resistant plate structure for concrete, has excellent wear resistance, and can be cut at a construction site in accordance with the shape of a concrete structure, and has a finished installation. It is also intended to provide a clean wear-resistant plate structure for concrete.

[Means and Actions for Solving the Problems]

The wear-resistant plate structure for concrete of sewerage facility according to claim 1, which achieves the above-mentioned object, is provided with a surface-side rubber layer having excellent wear resistance and the inside of the surface-side rubber layer, A reinforcing rubber-containing hard rubber layer having a high hardness and an inner rubber layer which is provided inside the hard rubber layer and is made of substantially the same material as the surface-side rubber layer are integrally formed. The wear resistant plate body having the fixing member insertion hole is fixed to the concrete structure by the fixing member inserted in the fixing member insertion hole.

According to the present invention, the wear-resistant plate main body is composed of the surface-side rubber layer having excellent wear resistance and the hard rubber layer containing the reinforcing fiber having a hardness higher than that, thus ensuring the necessary wear resistance. In addition, the wear-resistant plate body can be easily cut at the construction site according to the shape of the concrete structure.

Further, in the wear-resistant plate structure for concrete of a sewerage facility according to claim 2, in addition to the constituent features of claim 1, the fixing member is provided with a hole anchor, a mounting bolt, and between the hole anchor and the mounting bolt. The washer has a claw portion extending in the circumferential direction, and the fixing member insertion hole has an upper diameter larger than that of the washer and a lower diameter of the washer. A step made of the hard rubber layer containing the reinforcing fiber is formed so as to have a diameter smaller than the diameter, and when the wear-resistant plate body is fixed to the concrete structure by the fixing member, the claw part of the washer is formed on the step. It is characterized by eating.

According to the present invention, the washer in the fixing member is formed with the claw portion extending in the circumferential direction, and the claw portion of the washer when the wear-resistant plate body is fixed to the concrete structure by the fixing member is a hard rubber containing reinforcing fibers. Since it erodes into the stepped part consisting of layers, even if a force is applied in the direction in which the wear resistant plate body is peeled off from the concrete structure, the rubber around the fixing member insertion hole extends and the mounting bolts from the insertion hole. It is prevented from getting out.

〔Example〕

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

FIG. 1 is a partially enlarged side sectional view of an embodiment of a wear resistant plate structure for concrete according to the present invention, and FIG. 2 is a plan view of the wear resistant plate body. The wear-resistant plate body 6 of the wear-resistant plate structure 5 for concrete has a surface-side rubber layer 7 having excellent wear resistance,
A hard rubber layer 8 containing reinforcing fibers is integrally provided inside thereof. The hardness of the surface side rubber layer 7 is preferably HS60 to 70. If the hardness is lower than this, the surface is likely to be scratched, and if it is higher than this, abrasion resistance is deteriorated, which is not preferable. As a rubber material having such hardness and sufficient abrasion resistance, for example, SBR (styrene butadiene rubber) can be used. The hard rubber layer 8 is
The wear resistance is not required, but the wear resistance plate main body 6 has sufficient hardness so as to extend and prevent the mounting bolt 14 from pulling out when a force is applied in the direction of peeling from the concrete structure 10. is necessary. The hardness of the hard rubber layer 8 satisfying such requirements is preferably in the range of HS80 to 90. As such hard rubber, for example, rubber containing reinforcing fiber such as SBR containing vinylon cloth can be used. Further, in this embodiment, in order to prevent the abrasion resistant plate body 6 completed by the expansion and contraction of the front side rubber layer 7 from being curved in the manufacturing process of the abrasion resistant plate body 6, the inner side is further inside the hard rubber layer 8. The rubber layer 9 is integrally formed. As the inner rubber layer 9, the same rubber as the front side rubber layer 7, for example, SBR can be used. The total thickness of the wear-resistant plate body 6 of the present embodiment made of the above three layers of rubber is 20 to 30 mm.

The surface of the surface side rubber layer 7 is preferably embossed to prevent slipping so that a worker can safely proceed during construction and inspection for maintenance.

In order to fix the wear resistant plate body 6 to the concrete structure 10, the wear resistant plate body 6 has a plurality of fixing member insertion holes 11
Are formed. The wear-resistant plate body 6 includes a hole anchor 13 and a mounting bolt 14 inserted in the fixing member insertion hole 11.
It is fixed to the concrete structure 10 by a fixing member 12 including a washer 15. The fixing member insertion hole 11 is the first
As is clear from the figure, the stepped portion 16 made of the hard rubber layer 8 is formed so that the upper diameter is larger than the diameter of the washer 15 and the lower diameter is smaller than the diameter of the washer 15.

As shown in the side sectional view of FIG. 4, the washer 15 of the fixing member 12 is a circular member in which the insertion hole 15a of the mounting bolt 14 is formed in the center, and its lower surface extends in the circumferential direction. An annular claw portion 15b is provided.

Next, the wear-resistant plate body 5 having the above-mentioned structure
A construction method of laying on the concrete structure 10 and fixing it to the concrete structure 10 with the fixing member 12 will be described.

First, at the construction site, the actual concrete structure
A vinyl sheet or the like is applied to 10 and a cut line is drawn according to the actual product. The vinyl sheet or the like is superposed on the wear-resistant plate body 6 and the wear-resistant plate body 6 is cut along the cut line. After disposing the plurality of wear-resistant plate bodies 6 cut in this way at predetermined positions on the concrete structure 10 and confirming the fitting condition, a hole is formed at the position of the concrete structure 10 corresponding to the fixing member insertion hole 11. After forming an anchor driving hole and driving the hole anchor 13 through the fixing member insertion hole 11, the washer 15 is fitted to the mounting bolt 14 and the hole anchor.
The wear-resistant plate body 6 is fixed to the concrete structure 10 by screwing it into 13. At this time, the claw portion 15b of the washer 15 firmly bites into the stepped portion 16 made of a hard rubber layer to enhance the anchoring strength of the wear resistant plate body 6 to the concrete structure 10. Then, the gap between each fixing member insertion hole 11 and each wear resistant plate body 6 is filled with a filler to form a flat surface, and the wear resistant plate structure 5 for concrete is completed.

In addition, even in the curved surface part of the concrete structure 10,
As shown in the figure, it suffices that the wear-resistant plate body 6 be attached according to the curved surface shape of the curved surface portion. It is not necessary to perform bending in advance at the factory unlike the conventional rubber plate with an iron plate.

[Effects of the Invention] As described above, according to the present invention, the wear-resistant plate body is composed of the surface-side rubber layer having excellent wear resistance and the hard rubber layer containing the reinforcing fiber having a higher hardness than this. Therefore, it is possible to secure the necessary wear resistance and
The wear-resistant plate body can be easily cut according to the shape of the concrete structure at the construction site, and the installation finish can be made clean.

Further, since it is not necessary to individually perform design calculation for each human hole unlike the conventional rubber plate with an iron plate, it is possible to shorten the time until the start of construction. Construction costs can also be saved.

Also, the curved parts of the concrete structure and the joints between the curved parts and the flat parts do not require complicated bending work in advance at the factory unlike rubber plates with iron plates, so construction of wear resistant plate structures in these parts is required. Can be done very easily.

Further, according to the present invention, the washer in the fixing member is formed with a claw portion extending in the circumferential direction, and the claw portion of the washer contains reinforcing fibers when the wear-resistant plate body is fixed to the concrete structure by the fixing member. Even if a force is applied in the direction in which the wear resistant plate body is peeled off from the concrete structure, the rubber around the fixing member insertion hole extends and the mounting bolts It is prevented from being pulled out from the human hole, and the anchor strength of the wear resistant plate body to the concrete structure is further enhanced.

Further, according to the present invention, the inner rubber layer made of substantially the same material as the surface-side rubber layer is integrally formed inside the hard rubber layer containing the reinforcing fibers. It is possible to prevent the completed wear-resistant plate body from bending due to the expansion and contraction of the layers.

[Brief description of drawings]

FIG. 1 is a partially enlarged side sectional view showing an embodiment of a wear resistant plate structure for concrete according to the present invention, FIG. 2 is a plan view of a wear resistant plate body, and FIG. 3 uses a conventional rubber plate containing an iron plate. FIG. 3 (a) is a plan view showing the wear-resistant plate structure for concrete with the upper part of the human hole removed, and FIG. 3 (b) is a sectional view taken along line AA of FIG. 3 (a). Figure, Figure 3 (c)
Is a cross-sectional view taken along the line BB of FIG. 1 (a), FIG. 3 (d) is a development view of the rubber plate containing an iron plate, and FIG. 3 (e) is a fixing member insertion hole near the fixing plate of the rubber plate containing an iron plate. The partial expanded side sectional view of FIG. FIG. 4 is a side sectional view of the washer, and FIG. 5 is a perspective view showing an example of a wear-resistant plate structure at a connecting portion between a curved surface portion and a flat portion of a concrete structure. 5 ... Wear-resistant plate structure for concrete, 6 ... Wear-resistant plate body, 7 ... Surface rubber layer, 8 ... Hard rubber layer, 10 ... Concrete structure, 11 ... Fixing member insertion hole, 12 ... Fixing member, 13 …… Hole anchor, 14 …… Mounting bolt, 15
...... Washer, 15b …… Claw, 16 …… Step

Claims (2)

[Claims] 1. A surface-side rubber layer having excellent wear resistance, a hard rubber layer containing reinforcing fibers provided inside the surface-side rubber layer and having a hardness higher than that of the surface-side rubber layer, and the hard rubber. The wear-resistant plate body provided inside the layer, integrally formed with the inner rubber layer of the same material as the surface side rubber layer, and having a plurality of fixing member insertion holes, A wear resistant plate structure for concrete in a sewerage facility, characterized by being fixed to a concrete structure by a fixing member inserted into a member insertion hole. 2. The fixing member comprises a hole anchor, a mounting bolt, and a washer inserted between the hole anchor and the mounting bolt, the washer having a claw portion extending in the inner circumferential direction. Further, the fixing member insertion hole is formed with a stepped portion made of the hard rubber layer containing the reinforcing fiber such that the diameter of the upper portion is larger than the diameter of the washer and the diameter of the lower portion is smaller than the diameter of the washer. 2. The wear-resistant plate structure for concrete of sewerage facilities according to claim 1, wherein when the wear-resistant plate body is fixed to the concrete structure by the fixing member, the claw portion of the washer bites into the step.