Mounting structure and mounting method for water stop strip between new concrete and old concrete of gate culvert

Abstract

The invention relates to a mounting structure and a mounting method for a water stop strip between new concrete and old concrete of a gate culvert. The device is installed between an old concrete structure and a new concrete structure. Comprising a cutting groove formed in the middle of the vertical face of the old concrete structure, a water-swelling water stop belt is installed in the cutting groove, a water stop piece is arranged in the cutting groove, the inner end edge of the water stop piece makes contact with the water-swelling water stop belt, a left pressing plate and a right pressing plate are installed on the vertical face of the old concrete structure, and the two pressing plates clamp the water stop piece. The interior of the cutting groove is grouted to form a grouting body, an epoxy mortar layer covering the pressing plate is arranged on the vertical face of the old concrete structure, a polyethylene high-pressure closed-pore plate is arranged on the outer side of the epoxy mortar layer, and the outer side edge of the polyethylene high-pressure closed-pore plate makes contact with the water stop piece. The part, located outside, of the water stop strip is integrally poured and formed in the new concrete structure, and the polyethylene high-pressure closed-pore plate is located between the epoxy mortar layer and the vertical face of the new concrete structure. The defects that according to an existing installation structure, a water stop piece is not firm in installation, the water stop effect is poor, and construction is inconvenient are overcome.

Description

Technical Field

[0001] The present invention belongs to the field of water stop installation between old and new concrete structures of water conservancy sluices and culverts, and particularly relates to an installation structure and installation method of a water stop sheet between old and new concrete of a sluice and culvert. Background Technique

[0002] In partial demolition and reconstruction projects or continuation projects of inverted siphon sluices and box culvert projects in water conservancy projects, in order to adapt to the different settlement and deformation characteristics of old and new structures, it is generally necessary to set deformation joints at the joints of old and new structures and install water stop sheets to meet the requirements of structural waterproofing and leakage prevention. The commonly used construction method is to chisel a deep groove on the old concrete structure, install the water stop sheet, and then fill the groove with concrete or asphalt to fix the water stop sheet. Using this method, it is inconvenient to fill the concrete or asphalt, it is difficult to ensure dense filling, and the adhesion between the concrete or asphalt water stop sheet and the old concrete structure is not strong, and it is easy to loosen and fall off under the settlement deformation pressure and water pressure, and the risk of leakage is relatively large. The newly emerged technology of expanding and anchoring the water stop sheet in a shallow grooved slot has the problem of drilling holes in the water stop sheet, which is easy to cause leakage of the water stop sheet, and the shallow grooved slot construction is inconvenient, the base surface is uneven, and the actual operation effect is not good.

[0003] In summary, it is necessary to develop and design a new installation structure and installation method of a water stop sheet between old and new concrete of a sluice and culvert to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an installation structure of a water stop sheet between old and new concrete of a sluice and culvert, which overcomes the disadvantages of the existing water stop sheet being not firmly installed, poor water stop effect, and inconvenient construction.

[0005] The technical solution adopted by the present invention is: an installation structure of a water stop sheet between old and new concrete of a sluice and culvert, which is installed between the old concrete structure and the new concrete structure; it includes a cutting groove provided in the middle of the vertical surface of the old concrete structure, a water swelling water stop belt is installed in the groove of the cutting groove, a water stop sheet is provided in the cutting groove and the inner end edge of the water stop sheet is in contact with the water swelling water stop belt, two pressure plates are installed on the vertical surface of the old concrete structure and the two pressure plates clamp the water stop sheet, grouting is formed in the cutting groove to form a grouting body, an epoxy mortar layer covering the pressure plate is provided on the vertical surface of the old concrete structure, a polyethylene high-pressure closed-cell board is provided outside the epoxy mortar layer and the outer edge of the polyethylene high-pressure closed-cell board is in contact with the water stop sheet, the part of the water stop sheet located outside is integrally cast into the interior of the new concrete structure, and the polyethylene high-pressure closed-cell board is located between the epoxy mortar layer and the vertical surface of the new concrete structure.

[0006] Preferably, the two pressure plates are respectively installed and fixed on the vertical surface of the old concrete structure by expansion bolts.

[0007] Preferably, grouting holes are provided at the inner edges of the two pressing plates, and grouting equipment grouts into the cutting groove through the grouting holes to form the grouting body.

[0008] Preferably, a protrusion facing the water-receiving surface is provided at the root of the exposed part of the water-stop sheet, and the outer edge of the polyethylene high-pressure closed-cell board is embedded inside the protrusion.

[0009] Preferably, foam rubber is filled in the gap between the two pressing plates and the water-stop sheet.

[0010] Preferably, both ends of the water-stop sheet have bent portions, and the bent portions located in the cutting groove are in contact with the water-swelling water-stop belt.

[0011] Preferably, the water-stop sheet is made of red copper, with a width of 30 - 40 mm; the depth of the cutting groove is 15 - 20 cm, and the width is 3 - 5 cm; the pressing plates are made of stainless steel plates, with a width of 10 - 15 cm and a thickness of 5 - 10 mm; the thickness of the water-swelling water-stop belt is 10 - 20 mm; the thickness of the epoxy mortar layer is 5 - 10 mm.

[0012] Another object of the present invention is to provide an installation method for the water-stop sheet installation structure between the old and new concretes of the sluice culvert. The method includes the following steps:

[0013] Step S1, a cutting groove is opened in the middle of the vertical surface of the old concrete structure;

[0014] Step S2, a water-swelling water-stop belt is installed at the bottom of the cutting groove;

[0015] Step S3, a water-stop sheet is installed in the cutting groove, and the bent portion of the water-stop sheet is in contact with the water-swelling water-stop belt;

[0016] Step S4, expansion bolts are installed on the vertical surface of the old concrete structure, and the two pressing plates are installed and fixed on the vertical surface of the old concrete structure by using expansion bolts, and the two pressing plates clamp and fix the water-stop sheet;

[0017] Step S5, foam rubber is filled in the gap between the pressing plate and the water-stop sheet;

[0018] Step S6, grouting is carried out into the inside of the cutting groove through the grouting holes on the pressing plate to form a grouting body;

[0019] Step S7, epoxy mortar is applied on the vertical surface of the old concrete structure and the outside of the pressing plate to form an epoxy mortar layer;

[0020] Step S8, a polyethylene high-pressure closed-cell board is installed, and the outer edge of the polyethylene high-pressure closed-cell board is embedded inside the protrusion at the exposed root position of the water-stop sheet;

[0021] Step S9, cast-in-place construction is carried out on the new concrete structure, and the external part of the water-stop sheet is integrally cast and formed inside the new concrete structure.

[0022] The advantages and positive effects of the present invention are as follows:

[0023] The present invention provides a water stop installation structure and installation method between new and old concrete of a sluice culvert. Compared with the existing water stop installation structure and installation method, the present installation structure uses a pressing plate to fixedly clamp the water stop, which can make the cutting groove a closed grouting space, and can make the water stop closely adhere to the grouting body, forming a firm combination with the old concrete structure. The water stop clamped by the pressing plate, the epoxy mortar layer and the polyethylene high-pressure closed-cell board in the present installation structure reliably seal the gap between the old concrete structure and the new concrete structure. Since a water swelling water stop is arranged inside the cutting groove, the water seeping into the cutting groove can cause the water swelling water stop to expand, thereby cutting off the penetration path through the cutting groove. Therefore, the present installation structure has a better water stop effect.

[0024] The present water stop installation structure is provided with a grouting hole on its pressing plate. After the installation pressing plate clamps and fixes the water stop, grouting can be carried out into the cutting groove through the grouting hole to form a grouting body, and the epoxy mortar layer and the polyethylene high-pressure closed-cell board are constructed on the outside. Therefore, the present installation structure also has the advantage of convenient construction. Description of the Drawings

[0025] Figure 1 is a schematic top cross-sectional structure diagram of the present invention;

[0026] Figure 2 is Figure 1 the elevation structure diagram at the A-A position in

[0027] In the figure:

[0028] 1. Old concrete structure; 2. New concrete structure; 3. Cutting groove; 4. Water stop; 5. Pressing plate; 6. Grouting body; 7. Water swelling water stop; 8. Foam glue; 9. Grouting hole; 10. Expansion bolt; 11. Epoxy mortar layer; 12. Polyethylene high-pressure closed-cell board. Detailed Embodiment

[0029] In order to further understand the invention content, characteristics and efficacy of the present invention, the following examples are given for detailed description.

[0030] Please refer to Figure 1 and Figure 2 , the water stop installation structure between new and old concrete of the sluice culvert of the present invention is installed between the old concrete structure 1 and the new concrete structure 2. The old concrete structure 1 refers to the original concrete wall, and the new concrete structure 2 refers to the cast-in-place concrete wall. The new concrete structure 2 is the continuous construction part of the old concrete structure 1. The water stop 4 and its installation structure are located between the old concrete structure 1 and the new concrete structure 2, playing a role in water stop.

[0031] The installation structure of the water stop sheet includes a cutting groove 3 arranged in the middle of the vertical surface of the old concrete structure 1. A water swelling water stop belt 7 is installed in the groove of the cutting groove 3. A water stop sheet 4 is arranged in the cutting groove 3, and the inner end edge of the water stop sheet 4 is in contact with the water swelling water stop belt 7. The cutting groove 3 is formed by cutting on the end vertical surface of the old concrete structure 1 with an orbital wall cutting machine. During cutting, damage to the steel bars inside the old concrete structure 1 should be avoided. The water swelling water stop belt 7 is a rubber belt with the effect of swelling when encountering water. It is obtained by purchasing. Its function is that when external water permeates into the inside of the cutting groove 3, the water swelling water stop belt 7 swells when encountering water, closing the permeation channel and achieving the effect of enhancing water stop. In this embodiment, the thickness of the water swelling water stop belt 7 is 10 - 20 mm, preferably 15 mm.

[0032] In this embodiment, the water stop sheet 4 is made of copper and has a width of 30 - 40 mm, preferably 35 mm, and is formed by pressing a copper plate. In this embodiment, the depth of the cutting groove 3 is 15 - 20 cm, preferably 18 cm, and the width is 3 - 5 cm, preferably 4 cm.

[0033] On the vertical surface of the old concrete structure 1, there are two left and right pressing plates 5 installed, and the two pressing plates 5 clamp the water stop sheet 4. Grouting is carried out inside the cutting groove 3 to form a grouting body 6. In this embodiment, the pressing plate 5 is a stainless steel plate with a width of 10 - 15 cm, preferably 12 cm, and a thickness of 5 - 10 mm, preferably 8 cm.

[0034] The two pressing plates 5 close the port of the cutting groove 3, forming a grouting space inside. Another function of the pressing plate 5 is to clamp and fix the water stop sheet 4 before grouting to maintain the relative position of the water stop sheet 4 in the cutting groove 3. In this embodiment, grouting holes 9 are arranged on the inner side edges of the two pressing plates 5, and the grouting equipment grouts into the cutting groove 3 through the grouting holes 9 to form the grouting body 6. As Figure 2 shown, one grouting hole 9 is arranged at the upper and lower parts of the inner side edge of each pressing plate 5. In terms of the grouting process, "high funnel grouting" or "pressure grouting" can be adopted for grouting, and the grouting material can be C40 high-strength grouting material.

[0035] In this embodiment, the two pressing plates 5 are respectively installed and fixed on the vertical surface of the old concrete structure 1 by expansion bolts 10. Before installing the pressing plates 5, expansion bolts 10 are driven at the upper and lower parts of the vertical surface of the old concrete structure 1, and then the two pressing plates 5 are installed.

[0036] In order to improve the waterproof effect at the combined position between the pressing plate 5 and the water stop sheet 4, foam rubber 8 is filled in the gap between the two pressing plates 5 and the water stop sheet 4. The foam rubber 8 is filled into the aforementioned gap before grouting, so it also has the function of closing the gap between the pressing plate 5 and the water stop sheet 4 to avoid grout leakage.

[0037] An epoxy mortar layer 11 covering the pressing plate 5 is provided on the facade of the old concrete structure 1. A polyethylene high-pressure closed-cell board 12 is provided on the outer side of the epoxy mortar layer 11, and the outer edge of the polyethylene high-pressure closed-cell board 12 contacts the water stop sheet 4. The part of the water stop sheet 4 located outside is integrally cast inside the new concrete structure 2, and the polyethylene high-pressure closed-cell board 12 is located between the epoxy mortar layer 11 and the facade of the new concrete structure 2.

[0038] The epoxy mortar layer 11 provides a certain protective effect on the facade of the old concrete structure 1 and the two pressing plates 5, preventing water from entering the interior between the pressing plate 5 and the facade of the old concrete structure 1, achieving a better water stop effect. At the same time, the exposed end of the expansion bolt 10 is located in the epoxy mortar layer 11, so the epoxy mortar layer 11 also has the function of leveling the facade. In this embodiment, the thickness of the epoxy mortar layer 11 is 5 - 10 mm, preferably 8 mm.

[0039] The polyethylene high-pressure closed-cell board 12, also known as the polyethylene closed-cell foam board, is a foam board with characteristics such as strong recovery rate, low surface water absorption rate, good anti-seepage performance, not flowing at high temperatures, and not brittle at low temperatures. It is often used as a joint board in various expansion joints.

[0040] In this embodiment, a protrusion facing the water-receiving surface is provided at the root of the exposed part of the water stop sheet 4, and the outer edge of the polyethylene high-pressure closed-cell board 12 (that is, the edge on the water-receiving surface side) is embedded into the interior of the protrusion. One side of the polyethylene high-pressure closed-cell board 12 contacts the outer facade of the epoxy mortar layer 11, and the other side contacts the facade of the new concrete structure 2.

[0041] In this embodiment, both ends of the water stop sheet 4 have bending parts, and the bending part located in the cut groove 3 contacts the water-swelling water stop belt 7. The bending part provided inside the new concrete structure 2 can improve the structural strength of the combination with the new concrete structure 2.

[0042] The installation method of the water stop sheet installation structure between the old and new concrete of the sluice culvert includes the following construction steps:

[0043] Step S1, a cut groove 3 is opened in the middle of the facade of the old concrete structure 1;

[0044] Step S2, install the water-swelling water stop belt 7 at the bottom of the cut groove 3;

[0045] Step S3, install the water stop sheet 4 in the cut groove 3, and the bending part of the water stop sheet 4 contacts the water-swelling water stop belt 7;

[0046] Step S4: Install expansion bolts 10 on the facade of the old concrete structure 1, and fix the two pressure plates 5 to the facade of the old concrete structure 1 by using the expansion bolts 10. The two pressure plates 5 clamp and fix the waterstop 4.

[0047] Step S5: Fill the gap between the pressure plate 5 and the waterstop 4 with foam rubber 8.

[0048] Step S6: Grout into the inside of the cut groove 3 through the grouting hole 9 on the pressure plate 5 to form a grouting body 6.

[0049] Step S7: Apply epoxy mortar on the facade of the old concrete structure 1 and the outside of the pressure plate 5 to form an epoxy mortar layer 11.

[0050] Step S8: Install a polyethylene high-pressure closed-cell board 12, and embed the outer edge of the polyethylene high-pressure closed-cell board 12 into the protrusion at the exposed root position of the waterstop 4.

[0051] Step S9: Carry out in-situ casting construction for the new concrete structure 2, and integrally cast the external part of the waterstop 4 inside the new concrete structure 2.

Claims

1. A water stop installation structure between new and old concrete of a sluice culvert, which is installed between an old concrete structure (1) and a new concrete structure (2); characterized in that: It includes a cutting groove (3) arranged in the middle of the facade of the old concrete structure (1). A water-swelling waterstop (7) is installed in the groove of the cutting groove (3). A waterstop sheet (4) is arranged in the cutting groove (3), and the inner end edge of the waterstop sheet (4) contacts the water-swelling waterstop (7). Two left and right pressing plates (5) are installed on the facade of the old concrete structure (1), and the two pressing plates (5) clamp the waterstop sheet (4). Grouting is carried out inside the cutting groove (3) to form a grouting body (6). An epoxy mortar layer (11) covering the pressing plates (5) is arranged on the facade of the old concrete structure (1). A polyethylene high-pressure closed-cell board (12) is arranged outside the epoxy mortar layer (11), and the outer edge of the polyethylene high-pressure closed-cell board (12) contacts the waterstop sheet (4). The part of the waterstop sheet (4) located outside is integrally cast into the interior of the new concrete structure (2). The polyethylene high-pressure closed-cell board (12) is located between the epoxy mortar layer (11) and the facade of the new concrete structure (2).

2. The installation structure of the water stop between the old and new concrete of the sluice culvert according to claim 1, characterized in that: The two pressing plates (5) are respectively installed and fixed on the facade of the old concrete structure (1) by expansion bolts.

3. The water stop installation structure between the new and old concrete of the sluice culvert according to claim 2, characterized in that: Grouting holes (9) are arranged at the inner edges of the two pressing plates (5). The grouting equipment grouts into the cutting groove (3) through the grouting holes (9) to form the grouting body (6).

4. The water stop installation structure between the new and old concrete of the sluice culvert according to claim 3, characterized in that: A protrusion facing the water-receiving surface is arranged at the root of the exposed part of the waterstop sheet (4), and the outer edge of the polyethylene high-pressure closed-cell board (12) is embedded into the interior of the protrusion.

5. The water stop installation structure between the new and old concrete of the sluice culvert according to claim 4, characterized in that: Foam glue (8) is filled in the gap between the two pressing plates (5) and the waterstop sheet (4).

6. The water stop installation structure between the new and old concrete of the sluice culvert as described in claim 5, characterized in that: Both end edges of the waterstop sheet (4) have bending parts, and the bending parts located in the cutting groove (3) contact the water-swelling waterstop (7).

7. The water stop installation structure between the new and old concrete of the sluice culvert according to claim 6, characterized in that: The waterstop sheet (4) is made of copper, with a width of 30 - 40 mm; the depth of the cutting groove (3) is 15 - 20 cm, and the width is 3 - 5 cm; the pressing plate (5) is made of stainless steel, with a width of 10 - 15 cm and a thickness of 5 - 10 mm; the thickness of the water-swelling waterstop (7) is 10 - 20 mm; the thickness of the epoxy mortar layer (11) is 5 - 10 mm.

8. The installation method of the water stop sheet installation structure between the new and old concrete of the sluice culvert as described in claim 7, characterized in that: It includes the following steps Step S1, a cutting groove (3) is opened in the middle of the facade of the old concrete structure (1); Step S2, a water-swelling waterstop (7) is installed at the bottom of the cutting groove (3); Step S3, a waterstop sheet (4) is installed in the cutting groove (3), and the bending part of the waterstop sheet (4) contacts the water-swelling waterstop (7); Step S4, expansion bolts (10) are installed on the facade of the old concrete structure (1), and the two pressing plates (5) are installed and fixed on the facade of the old concrete structure (1) by the expansion bolts (10), and the two pressing plates (5) clamp and fix the waterstop sheet (4); Step S5, foam glue (8) is filled in the gap between the pressing plate (5) and the waterstop sheet (4); Step S6, grouting is carried out inside the cutting groove (3) through the grouting holes (9) on the pressing plate (5) to form a grouting body (6); Step S7, epoxy mortar is brushed on the facade of the old concrete structure (1) outside the pressing plate (5) to form an epoxy mortar layer (11); Step S8, install the high-pressure polyethylene closed-cell board (12), and embed the outer edge of the high-pressure polyethylene closed-cell board (12) into the protrusion at the exposed root position of the water stop sheet (4). Step S9, perform in-situ casting construction on the new concrete structure (2), and integrally cast the external part of the water stop sheet (4) inside the new concrete structure (2).

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