JPH04108929A - Wear-resistant plate structure for concrete in sewerage facilities - Google Patents

Abstract

PURPOSE:To secure wear resistance by providing a wear-resistant surface-side rubber layer and a harder reinforcing fiber contained hard rubber layer formed inside thereof, which are fixed to a concrete structure with fixing members inserted into fixing member insertion holes in a wear-resistant plate body. CONSTITUTION:A surface-side rubber layer 7 excellent in wear resistance and a reinforcing fiber contained hard rubber layer 8 integrally formed inside thereof are provided on a wear-resistant plate body 6 of a wear-resistant structure 5 for concrete. To fix the wear-resistant plate body 6 to a concrete structure 10, holes 11 to insert fixing members therein are formed in the wear-resistant body 6. To fix the wear-resistant plate body 6 to the concrete structure 10, the holes 11 to insert the fixing members therein are formed in the body 6, which is fixed with fixing members 12 consisting of hole anchors 13 inserted into the insertion holes 11, fitting bolts 14 and washers 15. It is thus possible to cut the body in keeping with the structure.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is for use in concrete constructions provided to protect concrete structures from abrasion at junction holes of sewage facilities and parts where sewage falls from a height of 1st grade. Regarding wear-resistant plate structure.

[Conventional technology]

Many parts of sewage facilities are constructed of concrete, and in order to prevent abrasion and corrosion of the concrete, they are usually designed to keep the flow velocity of sewage water within 3 m/sec. However, when constructing a pipe in an area where there is a topographical difference in height, it is necessary to provide a confluence manhole or a manhole in which the first flow velocity exceeds the above-mentioned velocity, and it is necessary to take some measures to prevent concrete abrasion and corrosion. Concrete protection measures will need to be provided.

Conventionally, as such a protection means, a method has been adopted in which a stone, a stainless steel plate, a rubber plate containing an iron plate, or the like is pasted as a wear-resistant plate for concrete in such a manhole. Figure 3 shows an example in which a rubber plate with an iron plate is used. Figure 3 (a
) is a plan view of manhole 1 with the upper part removed, Figure 3(b)
is a sectional view taken along the line A-A in Fig. 3(a), and Fig. 3(c) is a sectional view taken along line A-A in Fig. 3(a).
Figure 3(a) is a cross-sectional view taken along line BB, Figure 3(d) is a developed view of the rubber plate containing an iron plate, and Figure 3(e) is a partially enlarged side sectional view of the vicinity of the fixing member insertion hole of the rubber plate containing an iron plate. .

In Fig. 3, a rubber plate 4 containing an iron plate 4a is stretched in the manhole 1, covering the surface of an invert part with a semicircular cross section that connects a pipe 2.3 with a head. The plate 4 is fixed to the concrete structure of the invert portion by a fixing member (not shown) such as a hole anchor. This iron-filled rubber plate 4 has a shape that corresponds to the shape of the invert part to which it is attached, but since it is difficult to cut the iron-filled rubber plate at the construction site, it is necessary to adjust the shape of each invert part. Based on this, the development diagram shown in Figure 3 (d) is created by design calculation for each manhole, and a rubber plate containing an iron plate is made in advance at the factory according to the shape of this development diagram and brought to the manhole and stretched. I have to.

[Problem to be solved by the invention]

In the conventional abrasion plate structure for concrete, as mentioned above, a development diagram is designed individually for each hole, and a rubber plate with steel plates is created in a factory according to the development plan and brought to the site. Design calculations are required for each hole, so it takes time to manufacture it, and even if it is formed into a predetermined shape through the time-consuming process of cutting and bending the steel-filled rubber plate according to the development drawing. However, due to errors in the installation of pipes at construction sites, they do not actually fit perfectly with the invert parts, and the installation often does not have a clean finish.

The present invention has been made in view of the problems of the conventional concrete wear-resistant plate structure, and has excellent wear resistance.
Furthermore, the present invention aims to provide a wear-resistant plate structure for concrete that can be cut to match the shape of the concrete structure at the construction site and has a clean finish when installed.

[Means and effects for solving the problem] The structure of a wear-resistant plate for concrete for sewage facilities according to claim 1 which achieves the above object includes a surface rubber layer having excellent wear resistance; A wear-resistant plate main body, which is provided on the inside and has a reinforcing fiber-containing hard rubber layer having a higher hardness than the front side rubber layer and has a plurality of fixing member insertion holes, is inserted into the fixing member insertion hole. It is characterized in that it is fixed to a concrete structure using a fixing member.

According to the present invention, the wear-resistant plate main body is composed of a surface side rubber layer with excellent wear resistance and a hard rubber layer containing reinforcing fibers that is harder than the surface side rubber layer, so that the necessary wear resistance is ensured. In addition, the main body of the wear-resistant plate can be easily cut to match the shape of the concrete structure at the construction site.

In addition to the structural requirements of claim 1, the structure of the wear-resistant plate for concrete in sewerage facilities according to claim 2 has the following features: the fixing member is a hole anchor, the attachment is a bolt, and the hole anchor and the attachment are bolts. A washer is inserted between the washer and the washer is formed with a claw extending in the circumferential direction, and the fixing member insertion hole has an upper diameter larger than the diameter of the washer and a lower diameter smaller than the washer. A stepped portion made of a hard rubber layer is formed so that it is smaller than the diameter of the
When the wear-resistant plate main body is fixed to the concrete structure by the fixing member, the claw portion of the washer bites into the stepped portion.

According to the present invention, the washer in the fixing member is formed with a claw portion extending in the circumferential direction, and when the fixing member fixes the wear-resistant plate body to a concrete structure, the claw portion of the washer is made of hard rubber containing reinforcing fibers. Because it cuts into the stepped part consisting of layers,
Even if a force is applied in a direction that causes the wear plate main body to be peeled off from the concrete structure, the rubber around the fixing member insertion hole stretches to prevent the removal bolt from being pulled out from the insertion hole.

〔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 one embodiment of the structure of a wear-resistant plate for concrete 1 according to the present invention, and FIG. 2 is a plan view of the main body of the wear-resistant plate. The wear-resistant plate main body 6 of the wear-resistant plate structure 5 for concrete includes a surface side rubber layer 7 with excellent wear resistance,
A hard rubber layer 8 containing reinforcing fibers is integrally provided on the inside thereof. The hardness of the surface side rubber layer 7 is H360~
70 is preferred; if the hardness is lower than this, the surface will be easily damaged, and if the hardness is higher than this, the abrasion resistance will decrease, which is not preferred. For example, 5BR (styrene butadiene rubber) can be used as the rubber grit having such hardness and sufficient wear resistance. Furthermore, the hard rubber layer 8 is not required to have wear resistance, but instead expands when force is applied in the direction in which the wear-resistant plate body 6 is peeled off from the concrete structure, and the mounting bolt 4 is pulled out. It is necessary to have sufficient hardness so that it does not occur. The hardness of the hard rubber layer 8 that satisfies such requirements is preferably in the range of H880 to H90, and as such hard rubber, rubber containing reinforcing fibers such as vinylon cloth-filled SBR can be used. In addition, in this embodiment, in order to prevent the completed wear-resistant plate body 6 from being bent due to the expansion and contraction of the front side rubber layer 7 during the manufacturing process of the wear-resistant plate body 6, the hard rubber layer 8 is further inside the hard rubber layer 8. The rubber layer 9 is also integrally formed. As this inner rubber layer 9, the same rubber as the front side rubber layer 7 can be used, for example, SBR. The total thickness of the wear-resistant plate main body 6 of this embodiment made of the three layers of rubber is 20 to 30 mm.

The surface of the front side rubber layer 7 is preferably embossed to prevent slipping so that workers can pass through it safely during construction and maintenance inspections.

In order to fix the wear-resistant plate main body 6 to the concrete 1/structure 10, a plurality of fixing member insertion holes 11 are formed in the wear-resistant plate main body 6. The wear-resistant plate main body 6 has a hole anchor 13 inserted into the fixing part 4A insertion hole]1,
It is fixed to the concrete structure]0 by a fixing member 12 consisting of a J bolt 14 and a washer 15. As is clear from FIG. 1, the fixing member insertion hole 11 has a stepped portion made of the hard rubber layer 8 such that the diameter of the upper part is larger than the diameter of the washer 15 and the diameter of the lower part is smaller than the diameter of the washer 5. 16 are formed.

As shown in the side sectional view of FIG. 4, the washer 5 of the fixing member 12 is a circular member in which an insertion hole 15a for several bolts 4 is formed in the center, and a circumferential direction is formed on the lower surface of the washer 5. An annular claw portion], 5 b is provided.

Next, the wear-resistant plate main body 5 having the above structure is laid on the concrete structure 10, and the fixing member 12 is attached to the concrete structure 10.
This section explains the construction method for fixing to.

First, at the construction site, the actual concrete structure]
A vinyl sheet or the like is applied to 0, a cut line is drawn along with the actual material, the vinyl sheet or the like is placed on the wear-resistant plate body 6, and the wear-resistant plate body 6 is cut along the cut line. After placing the plurality of wear-resistant plate bodies 6 cut in this manner at predetermined positions on the concrete 1/structure 10 and checking how well they fit, the concrete structure 0 corresponding to the fixing member insertion hole 11 is placed. A hole anchor driving hole is drilled at the position, and the hole anchor 1 is inserted through the fixing member insertion hole 11.
After driving in 3, remove (-4 bolt) 4 with washer] 5
The wear-resistant plate main body 6 is fixed to the concrete 1/structure 10 by screwing into the fitting hole anchor 13. At this time, the claw portion 15b of the washer 15 firmly bites into the stepped portion 6 made of a hard rubber layer, thereby increasing the anchoring strength of the wear-resistant plate body 6 to the concrete structure 10. Thereafter, a filler is filled in each fixing member insertion hole 11 and the gap between each wear-resistant plate main body 6 to form a flat surface, thereby completing the wear-resistant plate structure 5 for concrete.

Furthermore, as shown in Fig. 5, even on the curved surface of the concrete 1/structure 10, the wear-resistant plate main body 6 can be stretched to match the curved shape of the curved surface, and it can be stretched just like a conventional rubber plate with iron plate. There is no need to pre-bend at the factory.

〔Effect of the invention〕

As described above, according to the present invention, the wear-resistant plate main body is
It consists of a surface rubber layer with excellent abrasion resistance and a hard rubber layer with reinforcing fibers that is harder than this layer, so it is possible to secure the necessary abrasion resistance and to make it easier to use concrete at the construction site.・(1η) The main body of the wear-resistant plate can be easily cut to match the shape of the building, and the installation can be done with a clean finish.

In addition, unlike conventional rubber plates with iron plates, there is no need to perform design calculations for each hole individually, so it is possible to shorten the time until the start of construction and save on construction costs.

In addition, unlike curved parts of concrete structures and the connections between curved parts and flat parts, complicated bending processes are not required in advance at the factory, unlike rubber plates with iron plates, so it is possible to construct wear-resistant plate structures in these parts. can be done extremely 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 when the fixing member fixes the wear-resistant plate body to a concrete structure, the claw portion of the washer is filled with reinforcing fibers. Because it bites into the stepped part made of a hard rubber layer, even if force is applied in the direction of the wear-resistant plate main body being torn off from the concrete structure, the rubber around the fixing member insertion hole will stretch and the mounting bolts will close to the fixing member insertion hole. This prevents the wear-resistant plate from being pulled out of the concrete structure, further increasing the anchoring strength of the wear-resistant plate body to the concrete structure.

[Brief explanation of the drawing]

Fig. 1 is a partially enlarged side sectional view showing one embodiment of the structure of a wear-resistant plate for concrete according to the present invention, Fig. 2 is a plan view of the main body of the wear-resistant plate, and Fig. 3 uses a conventional rubber plate containing a steel plate. Figure 3 (a) is a diagram showing the structure of a wear-resistant plate for concrete.
) is a plan view with the upper part of the manhole removed, FIG. 3(b) is a sectional view taken along line A-A in FIG. 3(a), and FIG. 3(c) is a plan view showing B in FIG. 3(d) shows a developed view of the rubber plate containing an iron plate, and FIG. 3(e) shows a partially enlarged side sectional view of the fixing member insertion hole of the rubber plate containing an iron plate. 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 the connection portion between the curved surface portion and the flat portion of the concrete structure.

Claims (2)

[Claims] (1) A surface-side rubber layer with excellent abrasion resistance, and a reinforcing fiber-containing hard rubber layer provided inside the surface-side rubber layer and having a higher hardness than the surface-side rubber layer; 1. A wear-resistant plate structure for concrete for a sewerage facility, characterized in that a wear-resistant plate main body in which a fixing member insertion hole is formed is fixed to a concrete structure by a fixing member inserted into the fixing member insertion hole. (2) The fixing member includes a hole anchor, a mounting bolt, and a washer inserted between the hole anchor and the mounting bolt, and the washer has a claw portion extending in the inner circumferential direction, The fixing member insertion hole has a stepped portion made of a hard rubber layer so that the diameter of the upper part is larger than the diameter of the washer and the diameter of the lower part is smaller than the diameter of the washer. 2. The structure of a wear-resistant plate for concrete for sewage facilities according to claim 1, wherein the claw portion of the washer bites into the stepped portion when the wear plate main body is fixed to a concrete structure.