Fixing structure of resin concrete panel

Abstract

To provide a fixing structure of a resin concrete panel for preventing spring water from flowing out to the tunnel inner surface side from the resin concrete panel back surface side in a construction method (a panel lining construction method) using the resin concrete panel adopted for repairing and reinforcing an inner wall surface in a lining concrete structure such as a tunnel for a water passage.SOLUTION: A resin concrete panel fixing structure 10 includes a fastening and fixing member 20 for fixing a resin concrete panel 11 to a panel fixing steel member 13, and a water leakage prevention member 30 having a height equal to or greater than a dimension obtained by adding a thickness of a resin concrete panel material and a thickness of a buffer material spacer 40, for preventing a gap from being formed between a fixing hole formed in the resin concrete panel 11 and the fastening and fixing member 20 when the fastening and fixing member 20 is fastened to the fixing hole formed in the resin concrete panel 11.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a fixing structure for fixing resin concrete panels used when installing resin concrete panels for repair and reinforcement on the inner wall surface of an existing concrete lining structure such as an aqueduct tunnel. [Background technology]

[0002] In recent years, a method using resin concrete panels (panel lining method) has been increasingly adopted when repairing and reinforcing lining concrete structures such as waterway tunnels.The panel lining method involves installing fixed steel members made of H-shaped steel or the like along the circumferential surface of the tunnel (at specified intervals in the tunnel axial direction) on the inside of the existing tunnel (steel supports), installing panel fixing steel members to connect the fixed steel members, and then fixing (resin concrete panels) to the panel fixing steel members with bolts or the like.Furthermore, a filler such as mortar is injected into the gap between the resin concrete panel and the existing tunnel lining concrete structure, filling it and allowing it to harden, resulting in an internal repair and reinforcement method.

[0003] When fixing resin concrete panels to panel fixing steel materials with countersunk bolts or the like, gaps can form between the fixing holes in the resin concrete panel and the sealing packing material attached around the countersunk bolts. As a result, spring water from the ground leaks out from the rear side of the resin concrete panel through the gaps between the fixing holes installed in the resin concrete panel and the sealing packing material to the inside of the tunnel, causing problems such as water leakage and efflorescence (a phenomenon in which free lime dissolved in water precipitates on the surface of concrete). The applicants conducted extensive research and development to address this situation, and have developed the present invention.

[0004] Patent Document 1 aims to "provide a spacer for installing resin concrete panels that allows for easy, low-cost height adjustment when fixing resin concrete panels to existing lining concrete without reducing the tunnel's flow path area (Patent Document 1: Abstract)," and discloses "a spacer used when installing repair resin concrete panels on existing lining concrete, which is the inner wall surface of a tunnel, etc., and which is made up of a base member that is installed on the existing lining concrete side and a height adjustment member that is installed on the repair resin concrete panel side, and which is characterized in that the base member and the height adjustment member have a through hole in the center for passing a bolt through (Patent Document 1: Abstract)." [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Utility Model Registration No. 3242020 Summary of the Invention [Problem to be solved by the invention]

[0006] The resin concrete panel installation spacer (Patent Document 1: name of the device) described in Patent Document 1 is a spacer used when installing repair resin concrete panels to existing concrete structures that serve as the interior wall of a tunnel or other structure. The base member and height adjustment member that make up the resin concrete panel installation spacer (Patent Document 1: name of the device) have a through-hole in the center for a bolt, but are not designed to prevent water leakage or efflorescence. Therefore, when the resin concrete panel is fixed to the panel-fixing steel material with a countersunk bolt or the like, a gap may form between the fixing hole (pre-drilled in the resin concrete panel) and the seal packing material attached to the countersunk bolt. This undesirably allows water to leak from the ground into the tunnel through the gap that forms in the fixing hole installed in the resin concrete panel from the back side.

[0007] The object of the present invention is to provide a fixing structure for resin concrete panels that prevents water springing up from the back side of the resin concrete panel (from the ground) from leaking into the inner surface of the tunnel, i.e., prevents water leakage, efflorescence, etc., by preventing gaps from occurring between the fixing holes in the resin concrete panel and countersunk bolts, etc., in a construction method (panel lining construction method) using resin concrete panels that is adopted for repairing and reinforcing lining concrete structures in waterway tunnels, etc. [Means for solving the problem]

[0008] In order to solve the above problem, the invention described in claim 1 is a panel fixing structure that prevents spring water from the back side of the ground of a resin concrete panel installed on an existing lining concrete structure from flowing out to the inner surface of a tunnel through gaps generated in the fixing holes of the resin concrete panel, a fastening member for fastening the resin concrete panel to the panel fixing steel material; This is a fixing structure for a resin concrete panel, characterized in that it is equipped with a water leakage prevention member to prevent gaps from occurring between the fixing hole installed in the resin concrete panel and the fastening member when the fastening member is tightened into the fixing hole installed in the resin concrete panel.

[0009] The invention described in claim 2 is characterized in that, in the invention described in claim 1, the tightening and fixing member is a flat head bolt, and the neck portion of the flat head bolt (the flat head side of the flat head bolt, the upper part of the cylindrical part) is not threaded, which is a fixing structure for a resin concrete panel described in claim 1.

[0010] The invention described in claim 3 is the fixing structure of a resin concrete panel described in claim 1 or claim 2, characterized in that in the invention described in claim 1 or claim 2, the water leakage prevention member is made of rubber and is ring-shaped with a height equal to or greater than the combined thickness of the resin concrete panel material and the thickness of the buffer spacer, and the width of the ring portion is greater than the difference in dimension between the radius of the fastening member (below the neck) and the radius of the fixing hole in the resin concrete panel.In addition, in this specification, the radius of the fastening member (below the neck) is defined as 1 / 2 of the diameter normally called the bolt diameter. [Effects of the Invention]

[0011] The present invention is a panel fixing structure that prevents spring water from the ground leaking into the tunnel interior through gaps that form in the fixing holes installed in the resin concrete panel from the rear side. It includes a fastening member for fixing the resin concrete panel to the panel fixing steel, and a water leakage prevention member that prevents gaps from forming between the fixing holes installed in the resin concrete panel and the fastening member (and between the buffer spacer and the fastening member) when the fastening member is fastened into the fixing hole installed in the resin concrete panel.

[0012] The water leakage prevention member is made of rubber and is ring-shaped with a height equal to or greater than the combined thickness of the resin concrete panel material and the thickness of the buffer spacer, and the width of the ring is greater than the difference in dimension between the radius of the fastening member and the radius of the fixing hole in the resin concrete panel, so that (after installation) there is no gap between the fastening member and the fixing hole in the resin concrete panel (and between the buffer spacer and the fastening member). Furthermore, the fastening member is a countersunk bolt, and the neck portion of the countersunk bolt (the countersunk side of the countersunk bolt, and the top of the cylindrical part) is not threaded (it is smooth with no crests or valleys of the thread structure), so it becomes dense (high density) due to the compression action of the fastening member (made of the same material as the seal packing material), and water leaking from the ground does not flow through.

[0013] As a result of the above, in a construction method using resin concrete panels (panel lining construction method) adopted for repairing and reinforcing lining concrete structures such as waterway tunnels, by preventing gaps from occurring between the fixing holes of the resin concrete panel and the sealing packing material (leakage prevention member in this invention) attached to the countersunk bolt, and by preventing water leaking from the ground from flowing out, it has become possible to realize a fixing structure for the resin concrete panel that prevents spring water (from the ground) from flowing out from the back side of the resin concrete panel to the inside of the tunnel, in other words, preventing water leakage, efflorescence, etc. [Brief explanation of the drawings]

[0014] [Figure 1] 10 is a diagram illustrating the fixing structure of the resin concrete panel. FIG. [Figure 2] 10 is a diagram for explaining the components that constitute the fixing structure of the resin concrete panel. FIG. [Figure 3] 1 is a diagram illustrating a fixing structure of a conventional resin concrete panel that causes water leakage. [Figure 4] FIG. 1 is an overall view of a fixing structure for a resin concrete panel. DETAILED DESCRIPTION OF THE INVENTION

[0015] <Fixing structure of resin concrete panels> An embodiment of a fixing structure 10 for a resin concrete panel according to the present invention will be described in detail below with reference to Figures 1 to 4. Figure 1 is a diagram for explaining the fixing structure for a resin concrete panel according to the present invention. Figure 1(a) shows the state before the resin concrete panel 11 is installed, and Figure 1(b) shows the state after the resin concrete panel 11 has been installed.

[0016] As shown in Figure 1(b), the fixing structure 10 for the resin concrete panel is a fixing structure 10 for the resin concrete panel that prevents spring water from the ground from leaking out (from the back side of the resin concrete panel 11) to the inner surface of the tunnel through gaps that occur in the fixing holes 12 (see Figure 1(a)) installed in the resin concrete panel 11.

[0017] The fixing structure 10 for the resin concrete panel includes a fastening member 20 for fixing the resin concrete panel 11 to the panel fixing steel material 13, and a water leakage prevention member 30 for preventing a gap from occurring between the fixing hole 12 installed in the resin concrete panel 11 and the fastening member 20 when the fastening member 20 is fastened into the fixing hole 12 installed in the resin concrete panel 11 (see Figure 1(b)).

[0018] 2 is a diagram illustrating the components that make up the resin concrete panel fixing structure 10. The fastening member 20 is a so-called countersunk bolt, characterized in that about 10 mm (1 / 3 to 1 / 4 the length of the non-counter-sunk portion of the bolt) of the neck portion (the countersunk side of the countersunk bolt, the upper part of the cylindrical portion: indicated as K in FIG. 2) of the bolt is not threaded (specifically, if the non-counter-sunk portion (cylindrical portion) of the countersunk bolt is 35 mm, the 10 mm of the neck portion is smooth, without any crests or roots of the thread structure). The reason for providing an unthreaded portion is that if the bolt were threaded, it would be composed of a threaded portion and a root portion, and water leaking from the ground would flow spirally along the root portion and eventually enter the gap between the fixing hole and the sealing packing material attached to the countersunk bolt.

[0019] The water leakage prevention member 30 is a so-called waterproof packing, and is (made of rubber) ring-shaped with a height equal to or greater than the combined thickness of the resin concrete panel 11 and the cushioning spacer 40. The width of the ring-shaped portion is designed to be greater than the difference in dimension between the radius of the tightening and fixing member 20 and the radius of the fixing hole 12 in the resin concrete panel 11.

[0020] As an example, if the water leakage prevention member 30 is a (rubber) ring-shaped member (outer diameter 18 mm, inner diameter 10 mm) with a height equal to or greater than the thickness of the resin concrete panel material and the thickness of the buffer spacer, the width of the ring portion will be 4 mm. On the other hand, if the radius of the fixing hole 12 of the resin concrete panel 11 is 7.5 mm, the width of the ring portion is designed to be larger (7.5 mm - 5 mm = 2.5 mm) than the dimensional difference with the radius of the fastening member 20 (5 mm). Considering watertightness, that is, to prevent gaps between the resin concrete panel 11 and the fastening member 20, and between the buffer spacer and the fastening member 20, the water leakage prevention member 30 is preferably equal to or greater than the thickness of the resin concrete panel 11 plus the thickness of the buffer spacer 40.

[0021] Figure 3 is a diagram illustrating the fixing structure of a conventional resin concrete panel 11 that is prone to water leakage. When installing the resin concrete panel 11, it is installed (bolted) with a watertight gasket (a water leakage prevention member 30) attached around the neck of the tightening and fixing member 20 (countersunk bolt). When the tightening and fixing member 20 (countersunk bolt) is tightened, the watertight gasket is (simultaneously) pressed in, and (the watertight gasket) is tightly fitted to the fixing hole 12 of the resin concrete panel 11 and the tightening and fixing member 20 (countersunk bolt), eliminating any gap between the fixing hole 12 of the resin concrete panel 11 and the tightening and fixing member 20 (countersunk bolt) (see Figure 3).

[0022] However, in the (conventional) fixing structure of the resin concrete panel 11, as shown in Figure 3, the (normal) thread is cut about 10 mm (1 / 3 to 1 / 4 of the length of the non-flat portion of the countersunk bolt) in the neck portion (the countersunk side of the countersunk bolt, the upper part of the cylindrical portion; indicated as K in Figure 2). As a result, as shown by the arrow in Figure 3, spring water (which has entered from the thread root portion) penetrates into the gap between the water stop packing (water leakage prevention member 30) and the fastening member 20 (by passing through the thread root portion) and flows out onto the surface of the resin concrete panel 11. In other words, the water stop effect is lost. Ultimately, even if the water stop packing (water leakage prevention member 30) fits securely into the gap between the fixing hole 12 (and buffer spacer 40) of the resin concrete panel 11 and the fastening member 20 (countersunk bolt), it cannot prevent intrusion from the thread root portion of the fastening member 20 (countersunk bolt), and spring water from the ground flows out (see Figure 3).

[0023] Figure 4 is an overall view of the resin concrete panel fixing structure 10. As shown in Figure 4, the resin concrete panel fixing structure 10 is a panel fixing structure 10 (for the resin concrete panel 11) that prevents spring water from the ground from flowing out to the inner surface of the tunnel (from the back side of the resin concrete panel) through gaps that occur in the fixing holes 12 (see Figure 1(a)) installed in the resin concrete panel 11.

[0024] The panel is provided with a fastening member 20 for fastening the resin concrete panel 11 to the panel fixing steel 13, and a water leakage prevention member 30 (see Figure 4) for preventing gaps from forming between the fixing holes 12 (see Figure 1(a)) provided in the resin concrete panel 11 and the fastening member 20 when the fastening member 20 is fastened into the fixing holes 12 (see Figure 1(a)) provided in the resin concrete panel 11 (a buffer spacer 40 (t = 10 x 40 x 40 x φ14) is provided between the resin concrete panel 11 and the panel fixing steel 13). This prevents gaps from forming between the resin concrete panel 11 and the fastening member 20, and between the buffer spacer 40 and the fastening member 20.

[0025] <Effect of the fixing structure of the resin concrete panel> In the present invention, by devising a method to prevent gaps from occurring between the fixing holes 12 of the resin concrete panel 11 and the fastening fixing member 20 (such as a flat head bolt), and by not threading 8 mm to 12 mm of the neck portion of the fastening fixing member 20 (the flat head side of the bolt, the upper part of the cylindrical part), it is possible to prevent water leaking from the ground from flowing out, thereby realizing a fixing structure for the resin concrete panel 11 that prevents spring water (from the ground) from flowing out from the back side of the resin concrete panel 11 to the inner surface of the tunnel, i.e., preventing water leakage, efflorescence, etc.

[0026] The water leakage prevention member 30 is a ring-shaped member (made of rubber) with a height (equal to or greater than the combined thickness of the resin concrete panel material 11 and the cushioning spacer 40), and the width of the ring portion is greater than the difference in dimension between the radius of the ring-shaped portion of the fastening member 20 and the radius of the fixing hole 12 in the resin concrete panel 11, so that (after construction) not only is there no gap between the fastening member 20 and the fixing hole 12 in the resin concrete panel 11, but there is also no gap between the cushioning spacer 40 and the fastening member 20. Furthermore, the fastening member 20 is a countersunk bolt, and 8 to 12 mm of the neck portion of the countersunk bolt (the countersunk side of the countersunk bolt, and the top of the cylindrical portion) is not threaded, so water leaking from the ground will not trickle down.

[0027] To summarize, in a construction method (panel lining construction method) using resin concrete panels 11, which is adopted for repairing and reinforcing the inner wall surfaces of lining concrete structures such as waterway tunnels, by preventing gaps from occurring between the fixing holes 12 of the resin concrete panel 11 and the tightening fixing members 20 (such as flat head bolts), and by preventing water leakage from the ground from flowing down, it has become possible to realize a fixing structure for the resin concrete panel 11 that prevents spring water (from the ground) from flowing out from the back side of the resin concrete panel 11 to the inner surface of the tunnel, in other words, that prevents water leakage, efflorescence, etc.

[0028] <Example of modified fixing structure for resin concrete panels> The fixing structure of the resin concrete panel according to the present invention is not limited to the above-mentioned embodiments, and the configuration of the tightening fixing members, water leakage prevention members, cushioning spacers, etc. can be appropriately changed as needed within the scope of the present invention. [Industrial Applicability]

[0029] The fixing structure of the resin concrete panel of the present invention has the excellent effects as described above, and can therefore be suitably used as a fixing structure for the resin concrete panel in a construction method using the resin concrete panel (panel lining construction method) that prevents spring water (from the ground) from flowing out from the back side of the resin concrete panel to the inside of the tunnel. [Explanation of symbols]

[0030] 10. Fixing structure of resin concrete panel 11. Resin concrete panel 12...Fixing hole 13 Panel fixing steel 20 Fastening member 30. Leak prevention member 40··Buffer spacer

Claims

1. A panel fixing structure that prevents spring water from the back side of the ground of a resin concrete panel installed on an existing lining concrete structure from flowing out to the inner surface of a tunnel through gaps generated in the fixing holes of the resin concrete panel. a fastening member for fastening the resin concrete panel to the panel fixing steel material; A fixing structure for a resin concrete panel, characterized by being equipped with a water leakage prevention member to prevent gaps from occurring between the fixing hole installed in the resin concrete panel and the tightening member when the tightening member is tightened into the fixing hole installed in the resin concrete panel.

2. The fixing structure of a resin concrete panel as described in claim 1, characterized in that the tightening fixing member is a flat head bolt, and the neck portion of the flat head bolt (the flat head side of the flat head bolt, the upper part of the cylindrical part) is not threaded.

3. The resin concrete panel fixing structure described in claim 1 or claim 2, characterized in that the water leakage prevention member is made of rubber and has a ring shape with a height equal to or greater than the combined thickness of the resin concrete panel material and the thickness of the buffer spacer, and the width of the ring portion is greater than the dimensional difference between the radius of the tightening member (the part below the neck) and the radius of the fixing hole in the resin concrete panel.

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