Fixing Structure of Resin Concrete Panel

Abstract

Provided is a fixing structure of a resin concrete panel for use in a method (panel lining method) that employs resin concrete panels for repair and reinforcement of an inner wall surface in a concrete structure for covering a tunnel or the like for a waterway, and that prevents water gushing from the back side of the resin concrete panel from flowing out to the inner surface side of the tunnel. 【Solution means】 A fastening and fixing member 20 for fixing a resin concrete panel 11 to a panel fixing steel material 13, and a water leakage prevention member 30 having a height equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel material and the thickness of a buffer material spacer 40 are provided so that no gap is generated between a fixing hole provided in the resin concrete panel 11 and the fastening and fixing member 20 when the fastening and fixing member 20 is tightened into the fixing hole provided in the resin concrete panel 11. The fixing structure 10 of the resin concrete panel is thus characterized.

Description

Technical Field

[0001] The present invention relates to a fixing structure for fixing a resin concrete panel used when installing a repair and reinforcement resin concrete panel on the inner wall surface of a covering concrete structure such as an existing water channel tunnel.

Background Art

[0002] In recent years, when repairing and reinforcing covering concrete structures such as water channel tunnels, a construction method using a resin concrete panel (panel lining method) has often been adopted. In the panel lining method, fixing steel materials made of H-shaped steel or the like are installed along the tunnel circumferential surface on the inner surface side of the existing tunnel (at predetermined intervals in the tunnel axial direction) (steel support), and after installing panel fixing steel materials so as to connect the fixing steel materials to each other, (the resin concrete panel) is fixed to the panel fixing steel materials by bolting or the like. Further, an internal repair and reinforcement method is performed in which a filling material such as mortar is injected into the gap between the resin concrete panel and the existing tunnel covering concrete structure and filled and solidified.

[0003] When fixing the resin concrete panel to the panel fixing steel material with a round head bolt or the like, a gap may occur between the fixing hole of the resin concrete panel and the seal packing material attached around the round head bolt. As a result, water gushing from the ground flows out to the inner surface side of the tunnel through the gap generated between the fixing hole provided in the resin concrete panel and the seal packing material on the back side of the resin concrete panel, and problems such as water leakage and efflorescence (also called "white bloom" or "efflo", a phenomenon in which free lime components dissolved in water precipitate on the surface of concrete) have occurred. In order to address such a situation, the applicants have conducted intensive research and development and arrived at the present invention.

[0004] Patent Document 1 sets as its problem "to provide a spacer for installing a resin concrete panel that can easily perform height adjustment at low cost when fixing the resin concrete panel to the existing lining concrete without reducing the flow area of the tunnel" (Patent Document 1: Summary), and discloses "a spacer used in the installation work of a repair resin concrete panel on the existing lining concrete that is the inner wall surface of a tunnel or the like, comprising a pedestal member installed on the existing lining concrete side and a height adjustment member installed on the repair resin concrete panel side, wherein the pedestal member and the height adjustment member have through holes at the center for passing bolts" (extracted from Patent Document 1: Summary).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] The spacer for installing a resin concrete panel according to Patent Document 1 (Patent Document 1: Name of the Invention) is a spacer used in the attachment work of a repair resin concrete panel to the existing lining concrete that is the inner wall surface of a tunnel or the like. The pedestal member and the height adjustment member that constitute the spacer for installing a resin concrete panel (Patent Document 1: Name of the Invention) have through holes at the center for passing bolts, but do not have a configuration for preventing water leakage and efflorescence. Therefore, when fixing the resin concrete panel to the panel fixing steel material with a pan head bolt or the like, a gap may occur between the fixing hole (originally drilled in the resin concrete panel) and the seal packing material attached to the pan head bolt. As a result, water gushing from the ground flows out to the inside of the tunnel through the gap generated in the fixing hole provided in the resin concrete panel from the back side of the resin concrete panel, which is not preferable.

[0007] An object of the present invention is to prevent water leakage, efflorescence, etc. by preventing water gushing from the back side of the ground (from the natural ground) from flowing out to the inner surface side of the tunnel through the gaps generated between the fixing holes of the resin concrete panel in the construction method (panel lining method) using the resin concrete panel adopted for the repair and reinforcement of the lining concrete structure in the water channel tunnel or the like. That is, to provide a fixing structure for the resin concrete panel that prevents water leakage, efflorescence, etc.

Means for Solving the Problems

[0008] In order to solve the above problems, the invention described in claim 1 is a panel fixing structure for preventing water gushing from the back side of the ground of the resin concrete panel installed in the existing lining concrete structure from flowing out to the inner surface side of the tunnel through the gaps generated in the fixing holes of the resin concrete panel, The length of 1 / 3 to 1 / 4 of the plate side of the neck portion, which is a tightening and fixing member for fixing the resin concrete panel to the panel fixing steel material, is an unthreaded dish bolt, and When the tightening Fixation member is tightened into the fixing hole provided in the resin concrete panel, a water leakage prevention member is provided so that no gap is generated between the fixing hole provided in the resin concrete panel and the Said tightening Fixation member. The water leakage prevention member is made of rubber and has a ring shape with a height equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel material and the thickness of the buffer material spacer. The width of the ring portion is larger than the dimensional difference between the radius of the neck portion of the tightening and fixing member and the radius of the fixing hole of the resin concrete panel, and it is a fixing structure for the resin concrete panel that shrinks with respect to the force compressing in the vertical direction. The water leakage prevention member is made of rubber and has a height equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel material and the thickness of the buffer material spacer. Installed between the resin concrete panel and the panel fixing steel material The water leakage prevention member is in a ring shape with a height equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel material and the thickness of the buffer material spacer. The width of the ring portion is larger than the dimensional difference between the radius of the neck portion of the tightening and fixing member and the radius of the fixing hole of the resin concrete panel, and it is characterized by being a fixing structure for the resin concrete panel that shrinks with respect to the force compressing in the vertical direction.

Effects of the Invention

[0011] The present invention is a panel fixing structure for preventing water gushing from the ground from flowing out to the tunnel inner surface side through a gap generated in a fixing hole provided in a resin concrete panel from the back side of the resin concrete panel. It includes a tightening member for fixing the resin concrete panel to a panel fixing steel material, and a water leakage prevention member for preventing a gap from occurring between the fixing hole provided in the resin concrete panel and the tightening member (and between the buffer material spacer and the tightening member) when the tightening member is tightened into the fixing hole provided in the resin concrete panel.

[0012] The water leakage prevention member is made of rubber and has a ring shape with a height equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel material and the thickness of the buffer material spacer. The width of the ring portion is larger than the dimensional difference between the radius of the tightening member and the radius of the fixing hole of the resin concrete panel. Therefore, a gap cannot be formed between the tightening member and the fixing hole of the resin concrete panel (and between the buffer material spacer and the tightening member) after construction. Furthermore, the tightening member is a dish bolt, and the neck portion of the dish bolt (the upper part of the cylindrical portion on the dish side of the dish bolt) is not threaded (because there are no thread ridges or valleys in the screw structure and it is smooth). Due to the compression action of the tightening member (made of the same material as the seal packing material), it becomes dense (with a high density), and water leakage from the ground cannot flow through.

[0013] From the above, in a construction method (panel lining method) using a resin concrete panel employed for repair and reinforcement of lining concrete structures such as tunnels for waterways, by preventing a gap from occurring between the fixing hole of the resin concrete panel and a seal packing material or the like (the water leakage prevention member in the present invention) attached to the dish bolt, and further by preventing water leakage from the ground from flowing out, it becomes possible to realize a fixing structure of the resin concrete panel that prevents water gushing (from the ground) from flowing out to the tunnel inner surface side from the back side of the resin concrete panel, that is, to prevent water leakage, efflorescence, etc.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0015] <Fixing Structure of Resin Concrete Panel> Hereinafter, an embodiment of the fixing structure 10 of a resin concrete panel according to the present invention will be described in detail with reference to FIGS. 1 to 4. FIG. 1 is a diagram for explaining the fixing structure of a resin concrete panel according to the present invention. FIG. 1(a) shows the state before installing the resin concrete panel 11, and FIG. 1(b) shows the state after installing the resin concrete panel 11.

[0016] As shown in FIG. 1(b), the fixing structure 10 of the resin concrete panel is a fixing structure 10 of the resin concrete panel that prevents the spring water from the ground (from the back side of the resin concrete panel 11) from flowing out to the inner surface side of the tunnel through the gap generated in the fixing hole 12 (see FIG. 1(a)) provided in the resin concrete panel 11.

[0017] The fixing structure 10 of the resin concrete panel includes a tightening 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 provided in the resin concrete panel 11 and the tightening member 20 when the tightening member 20 is tightened into the fixing hole 12 provided in the resin concrete panel 11 (see FIG. 1(b)).

[0018] FIG. 2 is a diagram for explaining the members constituting the fixing structure 10 of the resin concrete panel. The tightening member 20 is a so-called dish bolt, and it is characterized in that about 10 mm (1 / 3 to 1 / 4 of the length of the part other than the dish of the dish bolt) of the neck part of the dish bolt (the upper part of the cylindrical part on the dish side of the dish bolt: described as K in FIG. 2) is not threaded. (Specifically, if the part other than the dish of the dish bolt (cylindrical part) is 35 mm, the neck part of 10 mm is smooth without the thread ridges and valleys of the screw structure.) The reason for providing the unthreaded part is that if it is threaded, since it is composed of a thread ridge part and a thread valley part, water leakage from the base may flow spirally along the thread valley part and finally enter the gap between the fixing hole and the seal packing material attached to the dish bolt.

[0019] The water leakage prevention member 30 is a so-called water stop packing, and has a ring-shaped appearance with a height equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel 11 and the thickness of the buffer material spacer 40 (made of rubber). The width of the ring-shaped part is designed to be larger than the dimensional difference between the radius of the tightening and fixing member 20 and the radius of the fixing hole 12 of the resin concrete panel 11.

[0020] As an example, if the water leakage prevention member 30 has a ring shape (outer diameter 18 mm, inner diameter 10 mm) made of rubber and with a height equal to or greater than the sum of the thickness of the resin concrete panel material and the thickness of the buffer material spacer, the width of the ring part 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, it is designed to be larger than the dimensional difference (7.5 mm - 5 mm = 2.5 mm) from the radius (5 mm) of the tightening and fixing member 20 (width of the ring part: 4 mm). Considering water stoppage performance, it is preferable that the water leakage prevention member 30 is equal to or greater than the sum of the thickness of the resin concrete panel 11 and the thickness of the buffer material spacer 40 so that no gap occurs between the resin concrete panel 11 and the tightening and fixing member 20, and between the buffer material spacer and the tightening and fixing member 20.

[0021] FIG. 3 is a diagram for explaining a fixing structure of a conventional resin concrete panel 11 where water leakage occurs. When installing the resin concrete panel 11, it is installed (bolt tightened) with a water stop packing (water leakage prevention member 30) attached around the neck of the tightening fixing member 20 (flange bolt). When the tightening fixing member 20 (flange bolt) is tightened, the water stop packing is also pushed in at the same time, and the water stop packing is in close contact with the fixing hole 12 of the resin concrete panel 11 and the tightening fixing member 20 (flange bolt), and the gap between the fixing hole 12 of the resin concrete panel 11 and the tightening fixing member 20 (flange bolt) disappears (see FIG. 3).

[0022] However, in the fixing structure of the (conventional) resin concrete panel 11, as shown in FIG. 3, screw threading is performed at about 10 mm of the neck portion of the flange bolt (the upper part of the cylindrical portion on the flange side of the flange bolt: denoted as K in FIG. 2), which is about 1 / 3 to 1 / 4 of the length of the part other than the flange of the flange bolt. Then, as indicated by the arrow in FIG. 3, the spring water (invading from the thread groove portion) passes through the thread groove portion and infiltrates into the gap between the water stop packing (water leakage prevention member 30) and the tightening fixing member 20, and flows out to the surface of the resin concrete panel 11. That is, the water stop effect is lost. Eventually, even if the water stop packing (water leakage prevention member 30) fits tightly into the gap between the fixing hole 12 (and the buffer material spacer 40) of the resin concrete panel 11 and the tightening member 20 (flange bolt), it is impossible to prevent the invasion from the thread groove portion of the tightening fixing member 20 (flange bolt), and the spring water from the ground will flow out (see FIG. 3).

[0023] FIG. 4 is an overall view of the fixing structure 10 of the resin concrete panel. The fixing structure 10 of the resin concrete panel is a panel fixing structure 10 of the resin concrete panel 11 that prevents spring water from the ground from flowing out to the inner surface side of the tunnel (from the back side of the resin concrete panel) through the gap generated in the fixing hole 12 (see FIG. 1(a)) installed in the resin concrete panel 11 from the resin concrete panel 11.

[0024] A tightening member 20 for fixing the resin concrete panel 11 to the panel fixing steel material 13, and when the tightening member 20 is tightened into a fixing hole 12 (see Fig. 1(a)) provided in the resin concrete panel 11, (a cushioning material spacer 40 (t = 10×40×40×φ14) is provided between the resin concrete panel 11 and the panel fixing steel material 13) it is provided with a water leakage prevention member 30 for preventing a gap from occurring between the fixing hole 12 provided in the resin concrete panel 11 and the tightening and fixing member 20 (see Fig. 4). (By doing so) gaps between the resin concrete panel 11 and the tightening member 20, and between the cushioning material spacer 40 and the tightening and fixing member 20 are prevented from occurring.

[0025] <Effect of the fixing structure of the resin concrete panel> In the present invention, by devising so that no gap occurs between the fixing hole 12 of the resin concrete panel 11 and the tightening and fixing member 20 (such as a dish bolt), further, 8 mm to 12 mm of the neck portion (the upper part of the cylindrical portion on the dish side of the dish bolt) of the tightening and fixing member 20 (dish bolt) is not threaded, that is, by preventing water leakage from the ground from flowing out along, water gushing from the ground does not flow out to the inner surface side of the tunnel from the back side of the resin concrete panel 11, that is, a fixing structure of the resin concrete panel 11 for preventing water leakage, efflorescence, etc. can be realized.

[0026] The water leakage prevention member 30 has a ring shape with a height (equal to or greater than the dimension obtained by adding the thickness of the resin concrete panel material 11 and the thickness of the cushioning material spacer 40 (made of rubber)). Since the width of the ring portion is larger than the dimensional difference between the radius of the ring-shaped portion of the clamping and fixing member 20 and the radius of the fixing hole 12 of the resin concrete panel 11, not only is it impossible to create a gap between the clamping and fixing member 20 and the fixing hole 12 of the resin concrete panel 11 after construction, but also it is impossible to create a gap between the cushioning material spacer 40 and the clamping and fixing member 20. Furthermore, the clamping and fixing member 20 is a dish bolt, and since the 8 mm to 12 mm of the neck portion of the dish bolt (the upper part of the cylindrical portion on the dish side of the dish bolt) is not threaded, water leakage from the ground does not flow through.

[0027] To summarize the above, in the construction method (panel lining method) using the resin concrete panel 11, which is adopted for repairing and reinforcing the inner wall surface of a concrete structure such as a tunnel for a waterway, by preventing a gap from occurring between the fixing hole 12 of the resin concrete panel 11 and the clamping and fixing member 20 (such as a dish bolt), and further by preventing water leakage from the ground from flowing through, it has become possible to realize a fixing structure of the resin concrete panel 11 that prevents water gushing from the back side of the resin concrete panel 11 (from the ground) from flowing out to the inner surface side of the tunnel, that is, to prevent water leakage, efflorescence, etc.

[0028] <Modification example of the fixing structure of the resin concrete panel> The fixing structure of the resin concrete panel according to the present invention is not limited to the aspects of the above-described embodiments at all, and the configurations of the clamping and fixing member, the water leakage prevention member, the cushioning material spacer, etc. can be appropriately changed as necessary without departing from the gist of the present invention.

Industrial applicability

[0029] The fixing structure of the resin concrete panel according to the present invention has the excellent effects as described above. Therefore, in a construction method using a resin concrete panel (panel lining method), it can be suitably used as a fixing structure of the resin concrete panel that prevents the water gushing out from the back side of the resin concrete panel (from the ground) from flowing out to the inner surface side of the tunnel.

Explanation of Signs

[0030] 10 ··· Fixing structure of resin concrete panel 11 ··· Resin concrete panel 12 ··· Fixing hole 13 ··· Panel fixing steel material 20 ··· Tightening Fixation Member 30 ··· Water leakage prevention member 40 ··· Buffer spacer

Claims

[Claim 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 a gap generated in the fixing hole of the resin concrete panel, A flat head bolt is a fastening member for fastening a resin concrete panel to a steel panel fixing material, and the length of the flat head side of the neck portion is 1 / 3 to 1 / 4 of the length that is not threaded. The resin concrete panel is provided with a water leakage prevention member for preventing a gap from occurring between the fastening member and the fastening hole provided in the resin concrete panel when the fastening member is fastened into the fastening hole provided in the resin concrete panel, 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 cushioning spacer installed between the resin concrete panel and the panel fixing steel, and the width of the ring portion is greater than the dimensional difference between the radius of the neck portion of the tightening fixing member and the radius of the fixing hole in the resin concrete panel, and is characterized in that it shrinks in response to a compressive force in the vertical direction.

Images