Waterproofing structure for protective wall joint using a watertight sheet

Abstract

The present invention relates to a waterproof structure for a protective wall joint using a watertight sheet, comprising: a road pavement layer; protective walls formed on both sides of the road pavement layer; and a watertight sheet attached to the joint between the road pavement layer and the protective wall; wherein a plurality of grooves are formed on the inner surface of the protective wall that contacts the road pavement layer, and a primer is applied to the joint between the protective wall and the road pavement layer to form a primer layer while filling the grooves, and the watertight sheet is attached to the primer layer, and a joint of the watertight sheet is formed in the grooves, and a plurality of perforations are formed at the end of the watertight sheet where the joint is formed, and a second primer layer is formed by applying a primer to the outer side of the joint of the watertight sheet, and a reinforcing member having a mesh formed in the second primer layer is impregnated in the joint of the watertight sheet.

Description

Technology Field

[0001] The present invention relates to a structure that improves watertightness at the joint between a protective wall and a road pavement layer by using a watertight sheet. Background Technology

[0003] Generally, on bridges and the like, guardrails are installed at the shoulders on both sides to guide the direction of travel and prevent vehicle accidents.

[0004] However, gaps may form at the joint between the road pavement layer and the guardrail due to expansion and contraction caused by temperature, and through this, rainwater may leak and fall onto the parking lot or road below the bridge, causing secondary damage.

[0005] As an example of a conventional waterproofing method, Korean Patent Registration No. 10-1798443 presents a method for constructing an SBS modified asphalt waterproofing sheet, characterized by including: a floor plate cleaning step for removing irregularities and cleaning the bridge floor plate (1); a primer layer forming step for forming a primer layer by applying a primer to the upper surface of the floor plate; a waterproofing sheet forming step for forming a waterproofing sheet by heating the SBS modified asphalt waterproofing sheet (A) and adhering it to the primer layer; and a paving layer forming step for forming a paving layer on the upper surface of the SBS modified asphalt waterproofing sheet (A).

[0006] However, in the case of the above technology, while waterproofing is ensured on the upper surface of the bridge deck, there is a problem in that watertightness cannot be ensured at the joint between the guardrail and the road pavement layer. Prior art literature

[0008] Republic of Korea Patent Registration No. 10-1798443 The problem to be solved

[0009] The present invention aims to provide a structure for ensuring watertightness at the joint between a protective wall and a road pavement layer using a watertight sheet. means of solving the problem

[0011] As a means to solve the aforementioned problems, a waterproof structure for a protective wall joint using a watertight sheet of the present invention (hereinafter referred to as "the structure of the present invention") comprises: a road pavement layer; a protective wall formed on both sides of the road pavement layer; and a watertight sheet attached to the joint between the road pavement layer and the protective wall; wherein a plurality of grooves are formed on the inner surface of the protective wall that contacts the road pavement layer, and a primer is applied to the joint between the protective wall and the road pavement layer to form a primer layer while filling the grooves, and the watertight sheet is attached to the primer layer, and a joint of the watertight sheet is formed in the grooves, and a plurality of perforations are formed at the end of the watertight sheet where the joint is formed, and a second primer layer is formed by applying a primer to the outer side of the joint of the watertight sheet, and a reinforcing member having a mesh formed in the second primer layer is impregnated in the joint of the watertight sheet.

[0012] As an example, the above-mentioned watertight sheet is characterized by including attachment parts at both ends that are attached to a protective wall and a road pavement layer, and a connecting part that allows for expansion and contraction while connecting the attachment parts.

[0013] As one example, the above-mentioned connecting part is characterized by having a smooth inner surface and, on the outer surface, having transverse grooves formed at regular intervals in the transverse direction and longitudinal grooves formed in the longitudinal direction.

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[0017] As one example, the reinforcing member is characterized by being composed of a web in an I-shape and flanges at both ends of the web, wherein the web and one flange are inserted into a groove and impregnated into a primer layer, and the other flange is positioned on the outer side of the end of the opposing watertight sheet and impregnated into a second primer layer.

[0018] As an example, the reinforcing member is characterized by further comprising an extension end that is bent at one end of a flange. Effects of the invention

[0020] As explained above, the present invention has the advantage of ensuring watertightness at the joint between the protective wall and the road pavement layer by means of a watertight sheet.

[0021] In addition, the structure of the present invention has the advantage that tearing or lifting caused by expansion or contraction due to temperature changes at the joint can be controlled by the structure of the watertight sheet.

[0022] In addition, the structure of the present invention has the advantage of improving structural integrity by relieving stress at the joints of the watertight sheet. Brief explanation of the drawing

[0024] FIG. 1 is a drawing showing the structure of the present invention. FIG. 2 is a drawing illustrating an embodiment of a watertight sheet as a configuration of the structure of the present invention. FIG. 3 is a drawing illustrating another embodiment of the watertight sheet shown in FIG. 2. FIGS. 4 and FIGS. 5 are drawings illustrating an embodiment of the present invention. FIG. 6 is a cross-sectional view showing the joint (J) in FIG. 4. FIG. 7 is a front view showing the state before the second primer layer is applied as the joint (J) shown in FIG. 6. FIG. 8 is a plan view showing the state in which a second primer layer is applied to the joint (J) shown in FIG. 6. FIG. 9 is a partial diagram showing an example in which a reinforcing member is further configured in the joint (J) shown in FIG. 6. FIG. 10 is an operating state diagram of the reinforcing member shown in FIG. 9. FIG. 11 is a drawing showing an embodiment of the reinforcing member illustrated in FIG. 10. Specific details for implementing the invention

[0025] Hereinafter, the structure and operation of the present invention will be explained in more detail with reference to the attached drawings. In describing the present invention, terms and words used in this specification and claims must be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to describe his invention in the best way possible.

[0027] The structure (1) of the present invention is characterized by comprising a road paving layer (2) as shown in FIG. 1, a protective wall (3) formed on both sides of the road paving layer (2), and a watertight sheet (4) attached in a folded form to the joint portion as the inner surface of the coating paving layer (2) and the protective wall (3).

[0028] The above protective wall (3) is a structure installed to protect the safety of vehicles or pedestrians on bridges, roads, etc., and the protective wall (3) is composed of a foundation part that is fixed to the ground and made of concrete, although no drawing number is shown, and a wall part that is formed on the upper part of the foundation part and made of concrete.

[0029] The above road pavement layer (2) comes into direct contact with the vehicle and may be composed of asphalt pavement or concrete pavement.

[0030] In particular, the present invention is characterized by the fact that a watertight sheet (4) is formed at the joint portion between the protective wall (3) and the road pavement layer (2).

[0031] In the case of the road pavement layer (4), watertightness can be ensured by the material or structure, but watertightness may be reduced at the joint with the guardrail (3). Therefore, in the present invention, a watertight sheet (4) is further configured to improve watertightness at the joint between the guardrail (3) and the road pavement layer (2).

[0032] In addition, the present invention presents an embodiment of a watertight sheet (4) as shown in FIG. 2. The watertight sheet (4) of this embodiment is characterized by including an attachment part (41) that is attached to a protective wall (3) and a road pavement layer (2) at both ends, and a connecting part (42) that connects the attachment part (41) and allows for expansion.

[0033] In this embodiment, the watertight sheet (4) is configured such that attachment portions (41) are attached to the protective wall (3) and the road pavement layer (2) by means of a primer, etc., and the connecting portions (42) between the attachment portions (41) are made of a flexible material to accommodate expansion and contraction due to temperature changes, thereby enabling the control of the penetration of moisture and chlorides even when a gap is formed between the protective wall (3) and the road pavement layer (2).

[0034] Here, the connecting part (42) is made of a material that is flexible, and the material is not specifically limited.

[0035] In addition, as shown in FIG. 3, the connecting part (42) is further provided with an example in which the inner surface is formed as a smooth surface (421), and the outer surface has transverse grooves (422-1) formed in the transverse direction and longitudinal grooves (422-2) formed in the longitudinal direction at regular intervals.

[0036] The reason the inner surface is configured to be a smooth surface (421) is to increase the contact area with the protective wall (3) and the road pavement layer (2) to strengthen adhesion.

[0037] In particular, a transverse groove (422-1) is formed in the transverse direction and a longitudinal groove (422-2) is formed in the longitudinal direction on the exposed surface. The reason for forming the transverse groove (422-1) and the longitudinal groove (422-2) at regular intervals is to induce uniform expansion and contraction throughout, thereby controlling the occurrence of problems such as tearing or lifting caused by stress concentration in specific parts during expansion and contraction due to temperature changes in the protective wall (3) and the road pavement layer (2).

[0038] That is, in this embodiment, uniform expansion and contraction in the transverse and longitudinal directions of the connecting part (42) is induced by the transverse groove (422-1) and the longitudinal groove (422-2), thereby controlling local damage such as tearing caused by stress concentration in a specific direction or point, and controlling lifting such as partial deformation.

[0039] Meanwhile, the watertight sheet (4) attached in this way has a problem in that partial lifting occurs from the protective wall (3) due to repeated loads such as vehicles afterwards. In other words, there is a problem in that points are formed where watertightness and durability may be reduced.

[0040] Accordingly, in the present invention, a structure capable of further improving the adhesion of the watertight sheet (4) is presented in FIGS. 4 and FIGS. 5.

[0041] In this embodiment, a plurality of grooves (31) are formed on the inner surface of the protective wall (3), and a primer is applied to the joint portion between the protective wall (3) and the road pavement layer (2) while filling the grooves (31) to form a primer layer (5), and the watertight sheet (4) is attached to the primer layer (5).

[0042] A primer is applied to the joint portion between the protective wall (3) and the road pavement layer (2) to form a primer layer (5) and to attach a watertight sheet (4). In the case of the primer layer (5), the primer is filled into the groove (31) formed in the protective wall (3) so that the watertight sheet (4) attached to the primer layer (50) in the protective wall (7) is more firmly fixed.

[0043] That is, as seen in Fig. 5, the primer is filled into the groove (31) and the primer is applied to the end of the road pavement layer (2) that has already been poured, so that the primer layer (5) is constructed.

[0044] To this end, the above groove (31) can be formed to extend from the top to the bottom of the portion in contact with the road pavement layer (2) as seen in the drawing, on the inner side of the above protective wall (3).

[0045] In addition, as shown in FIG. 4, the grooves (31) are formed in multiple numbers at regular intervals on the inner wall of the protective wall (3), so that a joint (J) of the watertight sheet (4) is formed in some of the grooves (31).

[0046] To this end, a plurality of holes (43) are formed at the ends of the watertight sheet (4) so ​​that the primer constituting the primer layer (5) and the primer constituting the second primer layer (6) described below are filled into the holes (43), thereby ensuring that the watertight sheet (4) is firmly fixed at the joint (J).

[0047] In addition, a primer is applied to the outer side of the joint (J) of the watertight sheet (4) to form a second primer layer (6).

[0048] In this configuration, as shown in FIG. 7, the end of the watertight sheet (4) forming the joint (J) is attached to the primer layer (5) in the groove (31), and the primer forming the primer layer (5) is filled between the perforation (43) and the end of the watertight sheet (4). Subsequently, as shown in FIG. 8, a second primer layer (6) is applied to the outer side of the end of the watertight sheet (4) forming the joint (J) so that the watertight sheets (4) are firmly fixed in the joint (J). The materials of the primer layer (5) and the second primer layer (6) mitigate expansion and contraction due to heat and impact due to external force in the joint (J), thereby controlling the problem of reduced watertightness caused by tearing in the joint (J).

[0049] The primers constituting the primer layer (5) and the second primer layer (6) should be composed of the same material and, in addition to adhesion, composed of a material capable of elastic behavior so as to enable the aforementioned performance such as shock absorption. Since there are various known materials for this purpose, a detailed description thereof is omitted.

[0050] In addition, the present invention is characterized in that a reinforcing member (7) with a mesh formed thereon is impregnated into the second primer layer (6) at the joint (J) of the watertight sheet (4).

[0051] The above reinforcing member (7) is configured to reinforce the strength of the joint (J) of the watertight sheet (4), and is intended to further increase the resistance to tearing, damage, etc. at the joint (J) due to shrinkage and expansion caused by external force or changes in ambient temperature.

[0052] The reinforcing member (7) above should be formed with a mesh to facilitate impregnation into the primer, and its material should be composed of an elastic material so that it can be easily mounted as described below and the impact can be mitigated by the elastic material.

[0053] To this end, the reinforcing member (7) is configured with a web (71) in an I-shape as seen in FIG. 9, etc., and flanges (72) at both ends of the web (71). The web (71) and one flange (72) are inserted into the groove (31) and impregnated into the primer layer (5), and the other flange (72) is positioned on the outer side of the end of the opposing watertight sheet (4) and impregnated into the second primer layer (6).

[0054] As shown in FIGS. 9 and 10, the reinforcing member (7) is inserted between the joint (J) and the end of the watertight sheet (4) while the flange (72) narrows due to the elastic restoring force of the flange (72), and after insertion, the flange (72) is restored to a circular shape in the groove (31) so that the web (71) and the flange (72) are impregnated into the primer layer (5) between the groove (31) and the end of the watertight sheet (4), and subsequently, as the second primer layer (6) is applied, the flange (72) exposed on the outside of the end of the watertight sheet (4) is impregnated into the second primer layer (6).

[0055] In this way, the reinforcing member (7) is configured so that the primer layer (5), the second primer layer (6), and the ends of each watertight sheet (4) can move more firmly as a single unit at the joint (J). In addition to this single unit movement, each flange (72) of the reinforcing member (7), as well as the web (71) in particular, is made to function as a spring, thereby further doubling the shock absorption capacity of the primer layer (5) and the second primer layer (6). In particular, it further doubles the resistance to external forces that may act on the joint (J).

[0056] In addition, as shown in FIG. 11, an extension end (73) that is bent at one end of a flange (92) is further configured in the reinforcing member (7). This extension end (73) is impregnated into the second primer layer (6) on the outer side of the end of the watertight sheet (4) located on the upper side of the road pavement layer (2), thereby further doubling the strength and shock absorption ability of the joint (J) mentioned above.

[0058] From the above description, those skilled in the art will understand that various changes and modifications are possible within the scope of the technical concept of the present invention. Accordingly, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be determined by the claims. Explanation of the symbols

[0060] 1: Structure of the present invention 2: Road pavement layer 3 : Barrier 4 : Watertight sheet 5: Primer layer 6: Second primer layer 7 : Reinforcing member

Claims

Claim 1 A waterproof structure for a protective wall joint using a watertight sheet, comprising: a road pavement layer; protective walls formed on both sides of the road pavement layer; and a watertight sheet attached to the joint between the road pavement layer and the protective walls; wherein a plurality of grooves are formed on the inner surface of the protective wall that contacts the road pavement layer, and a primer is applied to the joint between the protective wall and the road pavement layer to fill the grooves and form a primer layer, and the watertight sheet is attached to the primer layer, and a joint of the watertight sheet is formed in the grooves, and a plurality of perforations are formed at the end of the watertight sheet where the joint is formed, and a second primer layer is formed by applying a primer to the outer side of the joint of the watertight sheet, and a reinforcing member having a mesh formed thereon is impregnated in the second primer layer at the joint of the watertight sheet. Claim 2 A waterproof structure for a protective wall joint using a watertight sheet according to claim 1, characterized in that the watertight sheet includes an attachment portion attached to a protective wall and a road pavement layer at both ends and a connecting portion that allows for expansion and contraction while connecting the attachment portions. Claim 3 A waterproof structure for a protective wall joint using a watertight sheet, characterized in that, in claim 2, the connecting part has an inner surface formed as a smooth surface, and on the outer surface, transverse grooves are formed in the transverse direction and longitudinal grooves are formed in the longitudinal direction at regular intervals. Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A waterproof structure for a protective wall joint using a watertight sheet, characterized in that, in claim 1, the reinforcing member is composed of a web in an I-shape and flanges at both ends of the web, the web and one flange are inserted into a groove and impregnated into a primer layer, and the other flange is located on the outer side of the end of the opposing watertight sheet and impregnated into a second primer layer. Claim 8 A waterproof structure for a protective wall joint using a watertight sheet, characterized in that, in claim 7, the reinforcing member further comprises an extension end bent at one end of a flange.

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