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

Abstract

The utility model relates to a water stop strip mounting structure 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 installation structure overcomes the defects that a water stop piece is not firmly installed, the water stop effect is poor, and construction is inconvenient in an existing installation structure.

Description

Technical Field

[0001] This utility model belongs to the field of water-stop installation between new and old concrete structures of water conservancy gates and culverts, and particularly relates to an installation structure for water-stop plates between new and old concrete structures of gates and culverts. Background Technology

[0002] In the partial demolition and reconstruction or continued construction of inverted siphon gates and box culverts in water conservancy projects, expansion joints are generally required at the connection points between the old and new structures to accommodate their different settlement and deformation characteristics, and waterstops are installed to meet the requirements for waterproofing and seepage prevention. A common construction method involves excavating a deep trench in the old concrete structure, installing the waterstop, and then filling the trench with concrete or asphalt to fix the waterstop. However, this method is inconvenient for filling with concrete or asphalt, makes it difficult to ensure a dense filling, and the adhesion between the concrete or asphalt waterstop and the old concrete structure is weak, making it prone to loosening and detachment under settlement and water pressure, resulting in a significant risk of leakage. A more recently developed technique involves shallow grooves with expansion anchors for waterstops, which requires drilling holes in the waterstop, easily leading to leakage. Furthermore, shallow groove construction is inconvenient, the base surface is uneven, and the actual operational effect is unsatisfactory.

[0003] In summary, a new type of installation structure for waterstop plates between old and new concrete sections in sluice gates and culverts needs to be developed to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide an installation structure for waterstop plates between new and old concrete sections of a sluice gate, overcoming the shortcomings of existing waterstop plates such as unstable installation, poor water-stopping effect, and inconvenient construction.

[0005] The technical solution adopted by this utility model is as follows: a water-stop plate installation structure between old and new concrete structures in a sluice gate, which is installed between the old and new concrete structures; including a groove set in the middle of the facade of the old concrete structure, a water-swellable water-stop strip installed in the groove, a water-stop plate set in the groove with its inner edge in contact with the water-swellable water-stop strip, two pressure plates set on the facade of the old concrete structure with the two pressure plates clamping the water-stop plate, grouting inside the groove to form a grout body, an epoxy mortar layer covering the pressure plates on the facade of the old concrete structure, a polyethylene high-pressure closed-cell plate set on the outside of the epoxy mortar layer with its outer edge in contact with the water-stop plate, the part of the water-stop plate located on the outside being integrally cast inside the new concrete structure, and the polyethylene high-pressure closed-cell plate located between the epoxy mortar layer and the facade of the new concrete structure.

[0006] Preferably, each of the two pressure plates is installed and fixed to the facade of the old concrete structure using expansion bolts.

[0007] Preferably, grouting holes are provided on the inner edges of the two pressure plates, and the grouting equipment injects grout into the groove through the grouting holes to form the grouting body.

[0008] Preferably, the exposed portion of the waterstop sheet has a protrusion at its root facing the backwater surface, and the outer edge of the polyethylene high-pressure closed-cell plate is embedded in the interior of the protrusion.

[0009] Preferably, the gap between the two pressure plates and the waterstop is filled with foam adhesive.

[0010] Preferably, both ends of the waterstop sheet have bent portions, and the bent portions located in the grooves are in contact with the water-swellable waterstop strip.

[0011] Preferably, the waterstop is made of copper and has a width of 30-40mm; the groove has a depth of 15-20cm and a width of 3-5cm; the pressure plate is made of stainless steel and has a width of 10-15cm and a thickness of 5-10mm; the water-swellable waterstop has a thickness of 10-20mm; and the epoxy mortar layer has a thickness of 5-10mm.

[0012] The advantages and positive effects of this utility model are:

[0013] This utility model provides a water-stop installation structure between the old and new concrete of a sluice gate. Compared with existing water-stop installation structures, this structure uses a pressure plate to fix and clamp the water-stop, making the groove a closed grouting space and allowing the water-stop to adhere tightly to the grout, forming a strong bond with the old concrete structure. This installation structure, with its pressure plate-clamped water-stop, epoxy mortar layer, and polyethylene high-pressure closed-cell plate, reliably seals the gap between the old and new concrete structures. Because a water-swellable water-stop strip is installed inside the groove, water seeping into the groove causes the water-swellable water-stop strip to expand, thereby cutting off the seepage path through the groove. Therefore, this installation structure has a superior water-stopping effect.

[0014] This waterstop installation structure has grouting holes on its pressure plate. After the pressure plate clamps and fixes the waterstop, grout can be injected into the groove through the grouting holes to form a grout body. The epoxy mortar layer and the polyethylene high-pressure closed-cell plate are constructed on the outside. Therefore, this installation structure also has the advantage of convenient construction. Attached Figure Description

[0015] Figure 1 This is a top sectional view of the structure of this utility model;

[0016] Figure 2 yes Figure 1 A schematic diagram of the elevation structure at position AA in the middle.

[0017] In the picture:

[0018] 1. Old concrete structure; 2. New concrete structure; 3. Groove; 4. Waterstop plate; 5. Pressure plate; 6. Grouting body; 7. Water-swellable waterstop; 8. Foam adhesive; 9. Grouting hole; 10. Expansion bolt; 11. Epoxy mortar layer; 12. Polyethylene high-pressure closed-cell board. Detailed Implementation

[0019] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0020] Please see Figure 1 and Figure 2 This utility model discloses a water-stop plate installation structure between the old and new concrete structures of a sluice gate. The old concrete structure 1 refers to the existing concrete wall, and the new concrete structure 2 refers to the cast-in-place concrete wall, with the new concrete structure 2 serving as a continuation of the old concrete structure 1. The water-stop plate 4 and its installation structure are located between the old and new concrete structures 1, serving to stop water flow.

[0021] The waterstop installation structure includes a groove 3 set in the middle of the facade of the old concrete structure 1. A water-swellable waterstop 7 is installed in the groove 3, and a waterstop 4 is provided in the groove 3 with its inner edge in contact with the water-swellable waterstop 7. The groove 3 is formed by cutting the end facade of the old concrete structure 1 using a track-type wall cutting machine. During cutting, care should be taken to avoid damaging the internal steel reinforcement of the old concrete structure 1. The water-swellable waterstop 7 is a rubber strip that expands when exposed to water. It is purchased and its function is to expand when external water seeps into the interior of the groove 3, sealing the seepage channel and enhancing the water-stopping effect. In this embodiment, the thickness of the water-swellable waterstop 7 is 10-20mm, preferably 15mm.

[0022] In this embodiment, the water-stopping plate 4 is made of copper, with a width of 30-40mm, preferably 35mm, and is formed by pressing copper sheet. In this embodiment, the groove 3 has a depth of 15-20cm, preferably 18cm, and a width of 3-5cm, preferably 4cm.

[0023] Two pressure plates 5 are installed on the facade of the old concrete structure 1, clamping the waterstop plate 4. Grout is injected into the groove 3 to form a grout body 6. In this embodiment, the pressure plate 5 is a stainless steel plate with a width of 10-15cm, preferably 12cm, and a thickness of 5-10mm, preferably 8cm.

[0024] Two pressure plates 5 seal the ends of the groove 3, creating a grouting space inside. Another function of the pressure plates 5 is to clamp and fix the waterstop plate 4 before grouting, maintaining its relative position within the groove 3. In this embodiment, grouting holes 9 are provided on the inner edges of the two pressure plates 5, and the grouting equipment injects grout into the groove 3 through these holes to form the grout body 6. Figure 2 As shown, a grouting hole 9 is provided at the upper and lower parts of the inner edge of each pressure plate 5. In terms of grouting process, "high funnel grouting" or "pressure grouting" can be used for grouting, and C40 high-strength grouting material can be used.

[0025] In this embodiment, each of the two pressure plates 5 is installed and fixed to the facade of the old concrete structure 1 using expansion bolts 10. Expansion bolts 10 are installed on the upper and lower parts of the facade of the old concrete structure 1 between the installation of the pressure plates 5, and then the two pressure plates 5 are installed.

[0026] To enhance the waterproofing effect at the joint between the pressure plate 5 and the waterstop 4, foam adhesive 8 is filled into the gap between the two pressure plates 5 and the waterstop 4. The foam adhesive 8 is filled into the aforementioned gap before grouting, thus also serving to seal the gap between the pressure plate 5 and the waterstop 4 to prevent grout leakage.

[0027] An epoxy mortar layer 11 covering a pressure plate 5 is provided on the facade of the old concrete structure 1. A polyethylene high-pressure closed-cell plate 12 is provided on the outside of the epoxy mortar layer 11, and the outer edge of the polyethylene high-pressure closed-cell plate 12 contacts the waterstop 4. The portion of the waterstop 4 located on the outside is integrally cast inside the new concrete structure 2, and the polyethylene high-pressure closed-cell plate 12 is located between the epoxy mortar layer 11 and the facade of the new concrete structure 2.

[0028] The epoxy mortar layer 11 provides a certain degree of protection to the facade of the old concrete structure 1 and the two pressure plates 5, preventing water from entering the interior through the gap between the pressure plates 5 and the facade of the old concrete structure 1, thus achieving a better waterproofing effect. Simultaneously, the exposed ends of the expansion bolts 10 are located within the epoxy mortar layer 11, therefore the epoxy mortar layer 11 also serves to level the facade. In this embodiment, the thickness of the epoxy mortar layer 11 is 5–10 mm, preferably 8 mm.

[0029] Polyethylene high-pressure closed-cell board 12, also known as polyethylene closed-cell foam board, is a foam board with strong resilience. It has the characteristics of low surface water absorption, good impermeability, no flow at high temperature and no brittleness at low temperature. It is often used as a joint board in various expansion joints.

[0030] In this embodiment, the exposed portion of the waterstop plate 4 has a protrusion at its root facing the back water surface. The outer edge of the polyethylene high-pressure closed-cell plate 12 (that is, the edge on the back water surface side) is embedded into the interior of the protrusion. One side of the polyethylene high-pressure closed-cell plate 12 is in contact with the outer facade of the epoxy mortar layer 11, and the other side is in contact with the facade of the new concrete structure 2.

[0031] In this embodiment, both ends of the waterstop 4 have bent portions, and the bent portions located in the groove 3 are in contact with the water-swellable waterstop 7. The bent portions set inside the new concrete structure 2 can improve the structural strength of the bond with the new concrete structure 2.

[0032] Construction method:

[0033] Step S1: Cut a groove 3 in the middle of the facade of the old concrete structure 1;

[0034] Step S2: Install water-swellable waterstop 7 at the bottom of the groove 3;

[0035] Step S3: Install the waterstop plate 4 in the groove 3 and make the bent part of the waterstop plate 4 contact the water-swellable waterstop 7.

[0036] Step S4: Install expansion bolts 10 on the facade of the old concrete structure 1, and fix the two pressure plates 5 on the facade of the old concrete structure 1 using expansion bolts 10. The two pressure plates 5 clamp and fix the waterstop plate 4.

[0037] Step S5: Fill the gap between the pressure plate 5 and the waterstop plate 4 with foam glue 8;

[0038] Step S6: Grout is injected into the interior of the groove 3 through the grouting hole 9 on the pressure plate 5 to form a grouting body 6;

[0039] Step S7: Apply epoxy mortar to the facade of the old concrete structure 1 and the outer side of the pressure plate 5 to form an epoxy mortar layer 11.

[0040] Step S8: Install the polyethylene high-pressure closed-cell plate 12, so that the outer edge of the polyethylene high-pressure closed-cell plate 12 is embedded into the protrusion at the exposed root position of the waterstop plate 4.

[0041] Step S9: The new concrete structure 2 is cast in place, and the outer part of the waterstop 4 is integrally cast into the interior of the new concrete structure 2.

Claims

1. A waterstop installation structure between old and new concrete sections of a sluice gate, installed between the old concrete structure (1) and the new concrete structure (2); characterized in that: This includes a groove (3) set in the middle of the facade of the old concrete structure (1), a water-swellable waterstop (7) installed in the groove (3), a waterstop plate (4) provided in the groove (3) with the inner edge of the waterstop plate (4) in contact with the water-swellable waterstop (7), two pressure plates (5) installed on the facade of the old concrete structure (1) and clamping the waterstop plate (4), and grouting inside the groove (3) to form a grouting body (6). An epoxy mortar layer (11) covering a pressure plate (5) is provided on the facade of the concrete structure (1). A polyethylene high-pressure closed-cell plate (12) is provided on the outside of the epoxy mortar layer (11), and the outer edge of the polyethylene high-pressure closed-cell plate (12) is in contact with the waterstop (4). The waterstop (4) is integrally cast inside the new concrete structure (2) on the outside. The polyethylene high-pressure closed-cell plate (12) is located between the epoxy mortar layer (11) and the facade of the new concrete structure (2).

2. The waterstop installation structure between the old and new concrete sections of the sluice gate as described in claim 1, characterized in that: The two pressure plates (5) are each installed and fixed to the facade of the old concrete structure (1) using expansion bolts.

3. The waterstop installation structure between the old and new concrete sections of the sluice gate as described in claim 2, characterized in that: Grouting holes (9) are provided on the inner edges of the two pressure plates (5). The grouting equipment injects grout into the groove (3) through the grouting holes (9) to form the grouting body (6).

4. The waterstop installation structure between the old and new concrete sections of the sluice gate as described in claim 3, characterized in that: The exposed portion of the waterstop (4) has a protrusion at its root facing the backwater surface, and the outer edge of the polyethylene high-pressure closed-cell plate (12) is embedded in the interior of the protrusion.

5. The waterstop installation structure between the old and new concrete sections of the sluice gate as described in claim 4, characterized in that: Foam adhesive (8) is filled in the gap between the two pressure plates (5) and the waterstop plate (4).

6. The waterstop installation structure between the old and new concrete sections of the sluice gate as described in claim 5, characterized in that: Both ends of the waterstop (4) have bent portions, and the bent portions located in the groove (3) are in contact with the water-swellable waterstop (7).

7. The waterstop installation structure between the old and new concrete sections of the sluice gate as described in claim 6, characterized in that: The waterstop plate (4) is made of copper and has a width of 30-40 mm; the groove (3) has a depth of 15-20 cm and a width of 3-5 cm; the pressure plate (5) is made of stainless steel and has a width of 10-15 cm and a thickness of 5-10 mm; the water-swellable waterstop strip (7) has a thickness of 10-20 mm; and the epoxy mortar layer (11) has a thickness of 5-10 mm.

Images