Water stop structure between new concrete and old concrete

Abstract

The utility model discloses a water stop structure between new concrete and old concrete. The water stop structure comprises an old concrete layer, a new concrete layer, a structural joint arranged between the old concrete layer and the new concrete layer and a water stop copper sheet. One end of the water stop copper sheet in the width direction is connected with the old concrete layer through an anchoring structure, and the other end of the water stop copper sheet is arranged in the new concrete layer; a first waterproof sealing layer and second waterproof sealing layers are arranged in the structural joint, the first waterproof sealing layer is filled in the structural joint where the water stop copper sheet is connected with the old concrete layer and completely wraps the water stop copper sheet and the anchoring structure which are located in the structural joint, and the second waterproof sealing layers are filled in the structural joint on the two sides of the first waterproof sealing layer. The water stop structure between the new concrete and the old concrete solves the technical problem that an old concrete structure is prone to being damaged when an existing connecting structure is constructed.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering anti-seepage, and specifically relates to a water-stop structure between new and old concrete. Background Art

[0002] In civil engineering, in order to avoid temperature expansion and contraction, foundation settlement and earthquake collision, etc., structural joints are usually used to divide concrete structures during structural design. However, building structures are inevitably exposed to various water environments during use. In order to prevent or reduce the harm and losses caused by leakage, water-stopping structures need to be set up in the structural joints. Copper sheet water-stopping is widely used because of its safety, reliability and excellent performance. With the rapid growth of the national economy, some civil buildings are often faced with the situation that some structures are aging and need to be demolished and rebuilt, while some structures are still good and can still be used, or only one side of the structural joints caused by other factors need to be demolished. This process will inevitably damage the original water-stopping copper sheet in the structural joints. When rebuilding the demolished structures, the water-stopping structure between the new and old concrete structural joints must also be restored and rebuilt.

[0003] China Utility Model Authorization Announcement No. CN209082427U discloses a new and old concrete water-stop connection structure with a pressure head, including a new concrete layer and an original concrete layer, a structural joint is arranged between the new concrete layer and the original concrete layer, a groove is chiseled in the original concrete layer, a new rubber water-stop is placed in the groove, a waterproof fixing layer is filled in the groove, the other end of the rubber water-stop is fixed in the original concrete layer, a polyethylene foam board is filled in the structural joint, a polyurea elastic coating is sprayed on the water-facing surface of the structural joint, an expansion water-stop strip is placed on the upper part of the polyurea elastic coating, and a polysulfide sealant layer is applied on the upper part of the expansion water-stop strip. The utility model adopts the method of chiseling grooves on the original concrete to restore the water-stop structure, but in practice, it is found that most of the original concrete structures are equipped with longitudinal and transverse force-bearing and distribution steel bars under the surface. Chiseling grooves on the original concrete is not only time-consuming and labor-intensive, but also easy to cause damage to the force-bearing steel bars, affecting the safety of the structure. Utility Model Content

[0004] In view of the above problems, the utility model aims to provide a water-stopping structure between new and old concrete, which can solve the technical problem that the existing connection structure is prone to damage to the old concrete structure during construction.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A water-stopping structure between old and new concrete comprises an old concrete layer, a new concrete layer and a structural joint arranged between the old concrete layer and the new concrete layer; its structural features are: it also comprises a water-stopping copper sheet; one end of the water-stopping copper sheet along the width direction is connected to the old concrete layer through an anchoring structure, and the other end is arranged in the new concrete layer; a first waterproof sealing layer and a second waterproof sealing layer are arranged in the structural joint, the first waterproof sealing layer is filled in the structural joint where the water-stopping copper sheet is connected to the old concrete layer, and completely wraps the water-stopping copper sheet and the anchoring structure located in the structural joint, and the second waterproof sealing layer is filled in the structural joint on both sides of the first waterproof sealing layer.

[0007] In the water-stopping structure of the utility model, the water-stopping copper sheet is connected to the old concrete layer through an anchoring structure. When drilling anchor holes on the old concrete layer, the anchor holes can be avoided according to the steel bars arranged inside the old concrete layer, without causing damage to the old concrete layer structure. The anchoring structure is simple to construct and more efficient. Filling the first waterproof sealing layer and the second waterproof sealing layer in the structural joint can prevent the poured new concrete from flowing into the structural joint, and can also effectively prevent the formation of a weak sealing part at the structural joint, further improving the sealing performance of the entire water-stopping structure.

[0008] Preferably, the water-stop copper sheet includes a horizontal portion, a vertical portion and a bent portion, wherein the bent portion is located between the horizontal portion and the vertical portion; the horizontal portion is connected to the old concrete layer through an anchoring structure, the bent portion is arranged in the structural joint, the vertical portion enters the new concrete layer along a direction perpendicular to the water flow, and the horizontal portion is located on the water-facing side of the vertical portion. The horizontal portion of the water-stop copper sheet is sealed and fastened to the surface of the old concrete layer through the anchoring structure, and the bent portion has good expansion and contraction performance in the vertical direction, and can effectively adapt to uneven settlement or other relative deformation on both sides of the structural joint.

[0009] Specifically, the cross-sectional shape of the bent portion is a U-shaped structure, and the opening of the U-shaped structure faces the water-facing side.

[0010] Preferably, a first gasket is provided between the horizontal portion and the old concrete layer, a second gasket and a flat steel are provided in sequence on the upper portion of the horizontal portion, and the flat steel, the second gasket, the horizontal portion, the first gasket and the old concrete layer are connected via an anchoring structure. The first gasket and the second gasket can improve the sealing performance of the connection structure on both sides of the horizontal portion.

[0011] Specifically, the horizontal part is isolated from the old concrete layer by a first gasket, and the horizontal part is isolated from the flat steel by a second gasket, and both the first gasket and the second gasket are rubber gaskets. The rubber gasket can prevent the water-stop copper sheet from contacting other metals to form a galvanic cell structure, thereby increasing the service life of the water-stop copper sheet.

[0012] Specifically, the anchoring structure includes a bolt and a nut matching the bolt; one end of the bolt is anchored to the old concrete layer, and the other end passes through the first gasket, the horizontal part, the second gasket and the flat steel in sequence, and is fastened by the nut.

[0013] Preferably, the first waterproof sealing layer is made of asphalt felt.

[0014] Preferably, the second waterproof sealing layer is made of asphalt wood board.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model has a water-stop structure between new and old concrete. The water-stop copper sheet is pressed tightly against the surface of the old concrete layer through the anchoring structure, which will not damage the structure of the old concrete layer. The anchoring structure is easy to construct, more efficient, safe and reliable, and has excellent performance.

[0017] 2. The water-stopping structure between new and old concrete of the utility model is provided with a bending part on the vertical part of the water-stopping copper sheet. The bending part has good expansion and contraction performance in the vertical direction and can effectively adapt to the uneven settlement or other relative deformation on both sides of the structural joint;

[0018] 3. The utility model provides a waterproof structure between new and old concrete, with rubber gaskets arranged on both the upper and lower sides of the horizontal part of the waterproof copper sheet, thereby eliminating the gap between the horizontal part of the waterproof copper sheet and the old concrete layer, improving the sealing performance, and at the same time, forming an isolation structure on both the upper and lower sides of the horizontal part of the waterproof copper sheet, thereby avoiding contact with other metals to form a galvanic cell structure, and improving the service life of the waterproof copper sheet;

[0019] 4. The utility model's waterproof structure between new and old concrete uses asphalt felt and asphalt wood boards to fill the structural joints to prevent the newly poured concrete from flowing into the structural joints. At the same time, it can effectively avoid the formation of weak sealing parts at the structural joints, further improving the sealing performance of the entire waterproof structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a water-stopping structure between new and old concrete of the utility model;

[0021] Figure 2 for Figure 1 Axonometric drawing of .

[0022] In the figure:

[0023] 1-old concrete layer, 2-new concrete layer, 3-waterstop copper sheet, 31-horizontal part, 32-vertical part, 33-bending part, 4-structural joint, 5-flat steel, 6-second gasket, 7-anchoring structure, 71-bolt, 72-nut, 8-first gasket, 9-first waterproof sealing layer, 10-second waterproof sealing layer. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0025] like Figure 1 As shown, a water-stop structure between old and new concrete in this embodiment includes an old concrete layer 1 and a new concrete layer 2 cast on the old concrete layer 1, and a structural joint 4 between the old concrete layer 1 and the new concrete layer 2 extends along the direction of water flow. A water-stop copper sheet 3 is installed between the old concrete layer 1 and the new concrete layer 2 through an anchoring structure 7, and the water-stop copper sheet 3 extends into the new concrete layer 2 in a direction perpendicular to the water flow and blocks the structural joint 4. Figure 2 As shown, the water-stop copper sheet 3 includes a horizontal portion 31 sealed and fastened to the surface of the old concrete layer 1 by an anchoring structure 7, a vertical portion 32 fixed on the horizontal portion 31 and extending vertically, and a bending portion 33 connecting the horizontal portion 31 and the vertical portion 32, and the vertical portion 32 enters the new concrete layer 2 along the direction perpendicular to the water flow. The bending portion 33 is an arc-shaped bending structure with a U-shaped cross-section and the U-mouth facing the water-facing side, and the bending portion 33 can be expanded and contracted. When uneven settlement or other relative deformation occurs on both sides of the structural joint 4, the bending portion 33 can be expanded and contracted to adapt, and the expansion and contraction change of the bending portion 33 is greater than the maximum relative displacement on both sides of the structural joint 4. A first gasket 8 is provided below the horizontal portion 31, and a second gasket 6 and a flat steel 5 are provided in sequence on the upper portion of the horizontal portion 31. The first gasket 8 and the second gasket 6 are both rubber gaskets. The anchoring structure 7 includes a bolt 71 and a nut 72 matching the bolt 71. One end of the bolt 71 is anchored to the old concrete layer 1, and the other end passes through the first gasket 8, the horizontal portion 31, the second gasket 6 and the flat steel 5 in sequence, and is fastened by the nut 72. Rubber gaskets are arranged on the upper and lower sides of the horizontal portion 31 to eliminate the gap between the water-stop copper sheet 3 and the old concrete layer 1, and an isolation structure is formed on the upper and lower sides of the horizontal portion 31 to prevent the water-stop copper sheet 3 from contacting other metals to form a galvanic cell structure.

[0026] This embodiment also requires filling and sealing the structural seam 4, such as Figure 1 and Figure 2As shown, at the designed structural joint 4, the first waterproof sealing layer 9 is filled around the anchor structure 7 and the bending portion 33 of the water-stop copper sheet 3, and the first waterproof sealing layer 9 completely wraps the anchor structure 7 and the bending portion 33. The second waterproof sealing layer 10 is filled on both the upstream and downstream sides of the first waterproof sealing layer 9 to prevent the newly poured concrete from flowing into the structural joint 4. The first waterproof sealing layer 9 is asphalt felt, and the second waterproof sealing layer 10 is asphalt wood board.

[0027] The specific installation construction method of the new and old concrete water-stopping structure of this embodiment is carried out according to the following steps:

[0028] 1. Drill anchor holes on the old concrete layer 1 at the set intervals, and clean the surface of the old concrete layer 1 within the range of the designed installation of the water-stop copper sheet 3; the position and number of the anchor holes are adjustable and are not limited to a specific position. If the steel bars inside the old concrete layer 1 appear at the position of the opened anchor holes, you can reselect the position for drilling;

[0029] 2. Drill corresponding holes on the horizontal portion 31 of the water-stop copper sheet 3, the first gasket 8, the second gasket 6, and the flat steel 5 at a set interval, and fix the horizontal portion 31 to the surface of the old concrete layer 1 through the anchor hole. The fixing method includes: placing the first gasket 8 and the second gasket 6 below and above the horizontal portion 31 of the water-stop copper sheet 3, respectively, placing the flat steel 5 on the second gasket 6, and passing the bolt 71 through the holes on the flat steel 5, the second gasket 6, the horizontal portion 31, and the first gasket 8 in sequence, and the lower end of the bolt 7 extends into the anchor hole, so that the entire anchoring structure 7 formed makes the horizontal portion 31 of the water-stop copper sheet 3 close to the upper surface of the old concrete layer 1;

[0030] 3. At the designed structural joint 4, fill the first waterproof sealing layer 9 around the anchor structure 7 and the bending part 33 of the waterproof copper sheet 3. The asphalt felt needs to completely wrap the anchor structure 7 and the bending part 33 of the waterproof copper sheet 3; install the second waterproof sealing layer 10 on both sides of the upstream and downstream of the asphalt felt to fill the joint;

[0031] 4. Pour new concrete layer 2 on the old concrete layer 1.

[0032] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A water-stop structure between new and old concrete, comprising an old concrete layer (1), a new concrete layer (2) and a structural joint (4) arranged between the old concrete layer (1) and the new concrete layer (2); characterized in that: It also includes a water-stop copper sheet (3); One end of the water-stop copper sheet (3) in the width direction is connected to the old concrete layer (1) via an anchoring structure (7), and the other end is arranged in the new concrete layer (2); A first waterproof sealing layer (9) and a second waterproof sealing layer (10) are provided in the structural joint (4); the first waterproof sealing layer (9) is filled in the structural joint (4) where the water-stop copper sheet (3) is connected to the old concrete layer (1), and completely wraps the water-stop copper sheet (3) and the anchoring structure (7) located in the structural joint (4); and the second waterproof sealing layer (10) is filled in the structural joint (4) on both sides of the first waterproof sealing layer (9).

2. The water-stopping structure between new and old concrete according to claim 1 is characterized in that: The water-stop copper sheet (3) comprises a horizontal portion (31), a vertical portion (32) and a bent portion (33), wherein the bent portion (33) is located between the horizontal portion (31) and the vertical portion (32); the horizontal portion (31) is connected to the old concrete layer (1) via an anchoring structure (7), the bent portion (33) is arranged in the structural joint (4), the vertical portion (32) enters the new concrete layer (2) along a direction perpendicular to the water flow, and the horizontal portion (31) is located on the water-facing side of the vertical portion (32).

3. The water-stopping structure between new and old concrete according to claim 2 is characterized in that: The cross-sectional shape of the bent portion (33) is a U-shaped structure, and the opening of the U-shaped structure faces the water-facing side.

4. The water-stopping structure between new and old concrete according to claim 2 is characterized in that: A first gasket (8) is provided between the horizontal portion (31) and the old concrete layer (1), a second gasket (6) and a flat steel (5) are provided in sequence on the upper portion of the horizontal portion (31), and the flat steel (5), the second gasket (6), the horizontal portion (31), the first gasket (8) and the old concrete layer (1) are connected via an anchoring structure (7).

5. The water-stopping structure between new and old concrete according to claim 4 is characterized in that: The horizontal portion (31) is isolated from the old concrete layer (1) by a first gasket (8), and the horizontal portion (31) is isolated from the flat steel (5) by a second gasket (6), and both the first gasket (8) and the second gasket (6) are rubber gaskets.

6. The water-stopping structure between new and old concrete according to claim 4 is characterized in that: The anchoring structure (7) comprises a bolt (71) and a nut (72) matching the bolt (71); one end of the bolt (71) is anchored to the old concrete layer (1), and the other end passes through the first gasket (8), the horizontal part (31), the second gasket (6) and the flat steel (5) in sequence and is fastened by the nut (72).

7. The water-stopping structure between new and old concrete according to claim 1 is characterized in that: The first waterproof sealing layer (9) is made of asphalt felt.

8. The water-stopping structure between new and old concrete according to claim 1 is characterized in that: The second waterproof sealing layer (10) is made of asphalt wood board.

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