Anti-seepage reinforcing structure of newly added rigid waterproof sleeve on side wall of existing pool

Abstract

The utility model relates to an anti-seepage reinforcing structure of a newly-added rigid waterproof sleeve on the side wall of an existing pool. The anti-seepage reinforcing structure comprises the pre-buried rigid waterproof sleeve, a reinforcement cage, a lap joint short rib, a limiting hoop, a putty type water-swelling waterstop ring and a secondary pouring shrinkage-free fine aggregate concrete ring. A hole is formed in the side wall of the existing pool, an embedded rigid waterproof sleeve is arranged in the center of the hole, a reinforcement cage is arranged on the periphery of the embedded rigid waterproof sleeve, and the reinforcement cage is fixedly connected with original longitudinal bars through lap joint short bars. A putty type water-swelling waterstop ring is arranged at the position, corresponding to the center of the side wall of the pool, of the new and old concrete combination surface on the periphery of the pre-embedded rigid waterproof sleeve; and concrete is poured in holes in the periphery of the pre-buried rigid waterproof sleeve by taking the reinforcement cage as a framework, so that a secondary pouring shrinkage-free fine aggregate concrete ring is formed. The part with the newly added rigid waterproof sleeve has good impermeability, the pored side wall of the pool can bear the lateral water pressure of the pool after being reinforced, the construction method is simple, and the use safety is high.

Description

Technical Field

[0001] This utility model relates to the fields of civil engineering and waterproofing technology, and in particular to a seepage prevention and reinforcement structure for adding a rigid waterproof sleeve to the side wall of an existing water tank. Background Technology

[0002] To save construction costs and revitalize idle properties, a "reuse + renovation" approach is often adopted to modify existing buildings to meet current national standards. Utilizing existing fire water tanks for water supply can significantly reduce construction costs. Drawing water from existing fire water tanks requires drilling holes in the tank's sidewalls and installing waterproof sleeves. Since the tank sidewalls must withstand considerable lateral water pressure when full, appropriate seepage prevention and reinforcement measures must be taken to ensure sufficient impermeability and safety after drilling.

[0003] According to the National Building Standard Design Atlas, the "Reinforcement Construction of Concrete Structures" (13G311-1) stipulates that after openings are made in concrete structures, the existing reinforcing steel bars at the opening location must be protected and anchored with a new layer of concrete, and flat steel bars must be pasted around the opening to reinforce the reinforced concrete wall. This method is simple to operate, but it does not involve the installation of rigid waterproof sleeves or the treatment of wall seepage prevention, and is only suitable for reinforcing new openings in conventional reinforced concrete walls.

[0004] Chinese invention patent CN 112538893 B discloses "a structure for pipe insertion through openings in the sidewall of an existing water tank." This method involves fixing pipe sections to openings in the existing water tank wall through secondary concrete pouring. Reinforcing bars are embedded in the existing water tank wall, and outer reinforcing bars are tied to the fixing bars, while inner reinforcing bars are tied to the pipe sections. Both the fixing bars and the outer reinforcing bars are located within the secondary reinforced concrete. This method allows for pipe insertion through openings in the tank wall, whether the tank is full or briefly empty, indirectly reinforcing the wall after the opening. However, with this method, the water-stop steel plates on the pipe and the secondary reinforced concrete structure are located on the outer sidewall of the existing water tank, resulting in poor overall integrity and weak impermeability. Furthermore, the indirect reinforcement measures are located in the pressure zone on the outer side of the tank wall, while the tension zone on the inner side of the tank wall remains unreinforced.

[0005] Chinese utility model patent CN 211342004 U discloses a "construction structure for reinforcing and preventing leakage of an existing water tank sidewall with openings." The method involves welding both ends of an additional L-shaped steel bar to a steel waterproof sleeve and to steel bars cut off by the opening within the water tank wall. A layer of micro-expansion secondary grouting material is filled between the steel waterproof sleeve and the concrete of the opening in the water tank wall. A V-shaped groove is provided on the inner wall of the concrete of the opening in the water tank wall, and the micro-expansion secondary grouting material layer is embedded in the V-shaped groove. However, with this method, the water-stop ring on the steel waterproof sleeve is located on the inner and outer surfaces of the existing water tank sidewall, and there is no water-stop strip at the interface between the old and new concrete, resulting in weak impermeability. Furthermore, the indirect connection between the steel waterproof sleeve and the steel bars cut off by the opening in the water tank wall easily causes deformation of the steel waterproof sleeve.

[0006] Chinese utility model patent CN 213809244 U discloses a "leak-sealing structure between the pool wall and the water pipe wall after a hole is made in the pool wall." The method involves creating a square hole in the pool side wall, reinforcing the side wall with three interconnected steel plates and through-wall bolts. A second through hole is created on a third steel plate located on the water-facing side of the pool wall, through which a circular water pipe passes. A waterproof transition strip is provided between the outer edge of the third steel plate and the water-facing side of the pool wall, and a micro-expansion waterproof material is filled between the circular water pipe wall and the first steel plate. While this method significantly reinforces the pool side wall, the lack of a waterproof sleeve and the presence of bolts penetrating the side wall result in relatively weak impermeability.

[0007] Chinese utility model patent CN 213929750 U discloses "a wall-penetrating connection structure for a sleeve added later in a water tank-like structure". The structure places a waterproof wing ring on the outside of the wall of the water tank-like structure, and several reinforcing bars are embedded in the wall around the opening. A circumferential reinforcing cage is set around the outside of the wall opening and surrounds the outside of the waterproof sleeve. A secondary concrete reinforcement is poured on-site to wrap the outer end of the waterproof sleeve, the waterproof wing ring, the outer ends of the reinforcing bars, and the circumferential reinforcing cage, forming a reinforced concrete reinforcement structure. The inner surface of this reinforced concrete reinforcement structure is tightly bonded to the outer surface of the water tank-like structure (which has been pre-roughened) and has a water-swellable sealing strip attached. The structure is similar to the Chinese invention patent with authorization announcement number CN 112538893 B. The waterproof wing ring on the sleeve and the secondary cast reinforced concrete structure are both located on the outside of the pool-like structure, resulting in poor integrity and weak impermeability. The reinforcement measures are located in the pressure zone on the outside of the pool wall, while the tension zone on the inside of the pool wall is not reinforced.

[0008] Chinese utility model patent with authorization announcement number CN 208105923 U discloses "a connection node structure for adding a waterproof sleeve to an existing water tank". It is similar to Chinese invention patent with authorization announcement number CN 112538893 B and Chinese utility model patent with authorization announcement number CN 213929750 U. The waterproof wing ring on the sleeve and the secondary cast reinforced concrete structure are located on the outside of the water tank structure, which has poor integrity and weak anti-seepage performance. The reinforcement measures are located in the pressure zone on the outside of the pool wall, while the tension zone on the inside of the pool wall is not reinforced.

[0009] Chinese utility model patent CN 202073192 U discloses "a reinforcement and seepage prevention structure for opening holes in existing reinforced concrete walls," which uses a double-wing ring sleeve. Cut-off reinforcing bars from the reinforced concrete wall are welded to the double-wing rings, giving the wing ring steel plates a certain degree of reinforcement to the sidewalls after the opening. However, it lacks a water-stop strip at the interface between the old and new concrete, resulting in weak seepage resistance; the welding of cut-off reinforcing bars from the reinforced concrete wall to the double-wing rings easily causes deformation of the wing rings and sleeve.

[0010] Chinese invention patent CN 110594493 B discloses a "structure and construction method for embedding a sleeve in an existing pool wall". The structure includes additional stirrups, annular additional reinforcing bars, a waterproof sleeve, and a pre-embedded annular steel plate, all fixed to the pool wall. The additional stirrups are connected to the annular additional reinforcing bars. The waterproof sleeve is welded to the pre-embedded annular steel plate at both ends. Anchor bars are welded to the inner side of the pre-embedded annular steel plate, and two concrete pouring holes are opened in the middle of the pre-embedded annular steel plate. The secondary reinforced concrete structure and the pre-embedded annular steel plate provide good reinforcement to the pool wall after the holes are opened. The wing ring and water-swellable sealing strip of the waterproof sleeve are located at the center of the pool wall cross-section, providing good impermeability. However, the construction process is relatively complex, and the two concrete pouring holes are located on the same side of the middle of the pre-embedded annular steel plate, which is not conducive to secondary concrete pouring.

[0011] The structural forms listed above all have certain drawbacks and cannot completely solve the problems of seepage prevention and reinforcement after adding rigid waterproof sleeves to the side walls of existing reinforced concrete fire water tanks. Therefore, it is necessary to design a safer, more reasonable, economical, and easier-to-construct structural form. Summary of the Invention

[0012] This utility model provides a seepage-proof reinforcement structure for adding a rigid waterproof sleeve to the side wall of an existing water tank. The part after adding the rigid waterproof sleeve has good seepage resistance. After the water tank side wall with the hole is reinforced, it can withstand the lateral water pressure of the water tank. The construction method is simple and the use is safe.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] A seepage-proof reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank includes a pre-embedded rigid waterproof sleeve, a reinforcing cage, lapped short bars, a limiting clamp, a putty-type water-swellable sealing ring, and a secondary cast non-shrink fine aggregate concrete ring. The sidewall of the existing water tank is a reinforced concrete structure. Holes are made at the installation locations of the pre-embedded rigid waterproof sleeve, and the original longitudinal reinforcement is retained at the holes. The pre-embedded rigid waterproof sleeve is located at the center of the hole. A reinforcing cage is installed in the hole surrounding the pre-embedded rigid waterproof sleeve, and a limiting clamp is installed between the two to position the pre-embedded rigid waterproof sleeve. The reinforcing cage is fixedly connected to the original longitudinal reinforcement through lapped short bars. A putty-type water-swellable sealing ring is installed at the center of the corresponding water tank sidewall at the interface between the old and new concrete surrounding the pre-embedded rigid waterproof sleeve. Concrete is poured in the hole surrounding the pre-embedded rigid waterproof sleeve with the reinforcing cage as the framework to form a secondary cast non-shrink fine aggregate concrete ring.

[0015] The steel cage consists of an inner ring reinforcing bar, a middle ring reinforcing bar, an outer ring reinforcing bar, and radial hoops. The inner ring reinforcing bar, the middle ring reinforcing bar, and the outer ring reinforcing bar are sequentially arranged in the annular space between the outer wall of the pre-embedded rigid waterproof sleeve and the interface between the old and new concrete. The three are connected by multiple radial hoops arranged circumferentially to form the steel cage.

[0016] The inner wall of the water tank is coated with a cement-based penetrating crystalline waterproof coating within the range of the secondary cast non-shrink fine aggregate concrete ring and its outer extension of 150-250mm.

[0017] The radius of the hole in the side wall of the pool is D / 2+(150~250)mm, where D is the diameter of the pre-embedded rigid waterproof sleeve.

[0018] The pre-embedded rigid waterproof sleeve is provided with a waterproof wing ring at its outer center.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1) Compared with indirect reinforcement measures located on the outside of the pool wall, this utility model expands the hole at the newly added sleeve and forms a reinforced concrete ring through reinforcing bars, radial hoops and secondary pouring, which directly reinforces the existing reinforced concrete pool wall after the hole is opened, thus significantly improving the structural safety.

[0021] 2) The waterproof wing ring and putty-type water-swellable sealing ring of the pre-embedded rigid waterproof sleeve are located at the center of the pool wall thickness, which significantly improves the impermeability of the two parts: the interface between the concrete and the rigid waterproof sleeve and the interface between the new and old concrete.

[0022] 3) The existing longitudinal reinforcement bars of the existing reinforced concrete pool wall are used to fix the reinforcing bars and radial hoops at the opening, and the pre-embedded rigid waterproof sleeve is fixed with limiting clamps to form a stable steel cage. The pre-embedded rigid waterproof sleeve will not move or misalign when the concrete is poured. The pre-embedded rigid waterproof sleeve is not directly connected to the longitudinal reinforcement bars of the pool wall, does not bear lateral water pressure, and will not deform.

[0023] 4) The construction method is simple, the old and new concrete are well bonded after demolding, the second pour of non-shrink fine stone concrete ring has good integrity, and the surface of the existing water tank side wall is smooth after the second pour; the water tank inner wall in the surrounding area is treated with cement-based penetrating crystalline waterproof coating, and the impermeability is further improved. Attached Figure Description

[0024] Figure 1 This is an elevation view of the opening when adding a rigid waterproof sleeve to the side wall of an existing water tank as described in this utility model.

[0025] Figure 2 This is an elevation view of the reinforcement structure when a rigid waterproof sleeve is added to the side wall of an existing water tank as described in this utility model.

[0026] Figure 3 This is a cross-sectional view of the reinforcement structure when a rigid waterproof sleeve is added to the side wall of an existing water tank as described in this utility model.

[0027] In the diagram: 1. Embedded rigid waterproof sleeve; 2. Inner ring reinforcing bar; 3. Middle ring reinforcing bar; 4. Outer ring reinforcing bar; 5. Radial hoop; 6. Existing longitudinal reinforcement; 7. Overlapping short reinforcement; 8. Limiting clamp; 9. Putty-type water-swellable sealing ring; 10. Secondary cast non-shrink fine aggregate concrete ring; 11. Bonding surface between new and old concrete; 12. Waterproof wing ring. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0029] like Figures 1-3As shown, the present invention relates to a seepage-proof reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank, comprising a pre-embedded rigid waterproof sleeve 1, a reinforcing cage, lapped short bars 7, a limiting clamp 8, a putty-type water-swellable sealing ring 9, and a secondary cast non-shrink fine aggregate concrete ring 10; the sidewall of the existing water tank is a reinforced concrete structure, and holes are made at the installation locations of the pre-embedded rigid waterproof sleeve 1, with the original longitudinal reinforcement 6 retained at the holes; the pre-embedded rigid waterproof sleeve 1 is located at the center of the hole, and the pre-embedded rigid waterproof sleeve 1... A steel cage is installed in the hole around the water sleeve 1, and a limiting clamp 8 is installed between the two to position the pre-embedded rigid waterproof sleeve 1. The steel cage is fixedly connected to the original longitudinal reinforcement 6 through lapped short bars 7. A putty-type water-swellable sealing ring 9 is installed at the center of the corresponding water tank side wall on the interface 11 of the new and old concrete around the pre-embedded rigid waterproof sleeve 1. Concrete is poured in the hole around the pre-embedded rigid waterproof sleeve 1 with the steel cage as the skeleton to form a secondary cast non-shrink fine stone concrete ring 10.

[0030] The steel reinforcement cage consists of an inner ring reinforcing bar 2, a middle ring reinforcing bar 3, an outer ring reinforcing bar 4, and radial hoops 5. The inner ring reinforcing bar 2, the middle ring reinforcing bar 3, and the outer ring reinforcing bar 4 are sequentially arranged in the annular space between the outer wall of the pre-embedded rigid waterproof sleeve 1 and the interface between the old and new concrete 11. The three are connected by multiple radial hoops 5 arranged along the circumference to form the steel reinforcement cage.

[0031] The inner wall of the water tank is coated with a cement-based penetrating crystalline waterproof coating within the range of the secondary cast non-shrink fine aggregate concrete ring 10 and its outer extension of 150-250mm.

[0032] The radius of the hole in the side wall of the pool is D / 2+(150~250)mm, where D is the diameter of the pre-embedded rigid waterproof sleeve 1.

[0033] A waterproof wing ring 12 is provided on the outer center of the pre-embedded rigid waterproof sleeve 1.

[0034] The construction method of the seepage prevention and reinforcement structure of the existing water tank sidewall with the addition of a rigid waterproof sleeve, as described in this utility model, is as follows:

[0035] 1) Locate the center of the newly added pre-embedded rigid waterproof sleeve 1 on the side wall of the existing water tank. Draw a circle with the center of the pre-embedded rigid waterproof sleeve 1 as the radius D / 2 to determine the installation position of the pre-embedded rigid waterproof sleeve 1. Draw a circle with the center of the pre-embedded rigid waterproof sleeve 1 as the radius D / 2+(150~250)mm to determine the hole size. The inner wall of the hole is the location of the interface 11 between the old and new concrete.

[0036] 2) Drill a hole at the location of the pre-embedded rigid waterproof sleeve 1 to form an opening with the same diameter as the nominal diameter D of the pre-embedded rigid waterproof sleeve 1; then chisel away the concrete around the opening until the hole size is reached, i.e., the interface 11 between the old and new concrete; the original longitudinal reinforcement 6 is retained when chiseling away the concrete.

[0037] 3) Roughen the interface 11 between the old and new concrete, clean the interface 11 with pressurized water, and apply an interface agent.

[0038] 4) Fix the putty-type water-swellable sealing ring 9 with an outer diameter of D+(350~450)mm to the center of the pool wall thickness using spaced steel nails. When fixing, the expansion surface of the putty-type water-swellable sealing ring 9 faces the existing concrete side.

[0039] 5) By laying out the reinforcing bars, fabricate the inner ring reinforcing bars 2, the middle ring reinforcing bars 3, the outer ring reinforcing bars 4, the radial hoops 5, and the lapped short bars 7;

[0040] 6) Place the pre-embedded rigid waterproof sleeve 1 into the already opened hole;

[0041] 7) Bend the end of the original longitudinal reinforcement 6 into the hole and weld it to the lapped short reinforcement 7 for fixation;

[0042] 8) Tie and fix the middle ring reinforcing rib 3 and the outer ring reinforcing rib 4 located at the edge of the pool wall to the original longitudinal reinforcing rib 6 respectively;

[0043] 9) Adjust the position of the radially arranged hoops 5 according to the set angle, and tie and fix the adjusted radial hoops 5 to the middle ring reinforcing rib 3 and the outer ring reinforcing rib 4 located at the edge of the pool wall respectively;

[0044] 10) Tie and fix the inner ring reinforcing rib 2, the outer ring reinforcing rib 4 located at the center of the pool wall, and the radial hoop 5;

[0045] 11) Measure the distance between the pre-embedded rigid waterproof sleeve 1 and the radial hoop 5, and make the limiting clamp 8 by laying out the steel bars; adjust the position of the pre-embedded rigid waterproof sleeve 1 by the limiting clamp 8 so that the center of the pre-embedded rigid waterproof sleeve 1 is accurately positioned with the embedding center and the end is flush with the surface of the pool wall.

[0046] 12) Weld and fix the limiting clamp 8 to the radial clamp 5 to form a steel cage; then spot weld the limiting clamp 8 to the pre-embedded rigid waterproof sleeve 1.

[0047] 13) Set up a template on the outside of the hole, and use self-compacting non-shrink fine aggregate concrete with a strength higher than that of the existing reinforced concrete of the water tank. Pour the concrete through the bottom inlet until the poured self-compacting non-shrink fine aggregate concrete overflows from the overflow hole; after the pouring is completed, a secondary pouring non-shrink fine aggregate concrete ring 10 is formed.

[0048] 14) Curing of the secondary-cast non-shrink fine aggregate concrete ring 10, and removal of the formwork after molding;

[0049] 15) Apply cement-based penetrating crystalline waterproof coating to the inner wall of the pool within a range of 150-250mm of the secondary cast non-shrink fine aggregate concrete ring 10 and its outer extension.

[0050] In step 2), the roughness depth of the interface between the old and new concrete 11 after roughening is greater than 10mm.

[0051] In step 4), the spacing between the steel nails is ≤500mm, and the thickness of the putty-type water-swellable sealing ring 9 is ≥10mm and the width is ≥30mm.

[0052] In step 15), the dosage of cement-based penetrating crystalline waterproof coating shall not be less than 1.5 kg / m². 2 The thickness is not less than 1.0 mm.

[0053] It should be understood that in this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model. They are not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model.

[0054] To more intuitively illustrate this utility model, the implementation methods of this utility model will be further described in conjunction with the embodiments. The following embodiments are merely preferred specific implementations of this utility model, but the protection scope of this utility model is not limited thereto. Any technical solutions that can be obviously obtained by those skilled in the art within the technical scope disclosed in this utility model, including simple variations or equivalent substitutions, are all within the protection scope of this utility model.

[0055]

Example

[0056] In this embodiment, a pre-embedded rigid waterproof sleeve is added to the side wall of the existing reinforced concrete fire water tank, and a seepage prevention and reinforcement structure is provided. The objects involved in the construction process include: 1. Pre-embedded rigid waterproof sleeve, 2. Inner ring reinforcing bar, 3. Middle ring reinforcing bar, 4. Outer ring reinforcing bar, 5. Radial hoop, 6. Existing longitudinal reinforcement, 7. Overlapping short reinforcement, 8. Limiting clamp, 9. Putty-type water-swellable sealing ring, and 10. Secondary cast non-shrink fine aggregate concrete ring.

[0057] In this embodiment, a steel cage is formed around the pre-embedded rigid waterproof sleeve 1 by the inner ring reinforcing rib 2, the middle ring reinforcing rib 3, the outer ring reinforcing rib 4, and the radial hoop 5, which fixes the pre-embedded rigid waterproof sleeve 1 into the newly opened hole in the pool wall; the original longitudinal reinforcement 6 of the existing reinforced concrete fire water tank is retained, and the ends of the original longitudinal reinforcement 6 are bent into the hole and welded to the lapped short reinforcement 7; the putty-type water-swellable sealing ring 9 is fixed at the center of the pool wall thickness; the secondary cast non-shrink fine stone concrete ring 10 is located between the pre-embedded rigid waterproof sleeve 1 and the interface 11 of the new and old concrete; the inner wall of the pool within the secondary cast non-shrink fine stone concrete ring 10 and its outer 200mm range is coated with cement-based penetrating crystalline waterproof coating.

[0058] The specific construction process includes the following steps:

[0059] 1) On the wall of the existing reinforced concrete fire water tank (hereinafter referred to as the existing fire water tank), locate the center line of the newly added pre-embedded rigid waterproof sleeve, and use this as the center to draw a circle with a radius of 250mm for the newly added DN500 pre-embedded rigid waterproof sleeve to determine its specific installation position; draw a circle with a radius of 450mm to determine the range of concrete to be removed, i.e. the position of the interface 11 between the old and new concrete.

[0060] 2) Drill holes at the location of the pre-embedded rigid waterproof sleeve to form an opening with the same diameter as the nominal diameter of the pre-embedded rigid waterproof sleeve (D=500mm); remove the concrete between the opening on the existing fire water tank wall and the determined interface 11 between the new and old concrete, and retain the original longitudinal reinforcement 6 to form the pouring area of ​​the secondary pouring non-shrink fine stone concrete ring 10.

[0061] 3) Roughen the interface between the old and new concrete on the wall of the existing fire water tank to a roughness depth of 12mm. Clean the interface between the old and new concrete with pressurized water and apply an interface agent to ensure the quality and reliability of the connection interface.

[0062] 4) Fix a putty-type water-swellable sealing ring 9 with a thickness of 10mm, a width of 30mm, and an outer diameter of 900mm to the center position of the pool wall thickness (pool wall thickness is t) using steel nails spaced at 500mm intervals. When fixing, the expansion surface of the putty-type water-swellable sealing ring 9 faces the existing concrete.

[0063] 5) Select steel bars with the same diameter and strength grade as the original longitudinal reinforcement 6, and fabricate inner ring reinforcement 2, middle ring reinforcement 3, outer ring reinforcement 4 and lapped short bars 7 through steel bar layout. The mutual anchorage length of the ring reinforcement is ≥40d (d is the diameter of the original longitudinal reinforcement 6); select steel bars with HPB300 specification and diameter of 12mm, and fabricate radial hoops 5 through steel bar layout.

[0064] 6) Place the pre-embedded rigid waterproof sleeve 1 into the already opened hole;

[0065] 7) Bend the 100mm portion of the original longitudinal reinforcement 6 into the hole and weld it to the lapped short reinforcement 7 for fixation;

[0066] 8) Tie and fix the middle ring reinforcing rib 3 and the outer ring reinforcing rib 4 located at the edge of the pool wall (in the thickness direction) to the original longitudinal rib 6 respectively;

[0067] 9) Adjust the position of the radial hoops 5 at 30° intervals, and tie and fix the adjusted radial hoops 5 to the middle ring reinforcing rib 3 and the outer ring reinforcing rib 4 located at the edge of the pool wall (thickness direction);

[0068] 10) Tie and fix the inner ring reinforcing rib 2 and the outer ring reinforcing rib 4 located at the center (thickness direction) of the pool wall to the radial hoop 5;

[0069] 11) Based on the size of the gap between the pre-embedded rigid waterproof sleeve 1 and the radial hoop 5, select steel bars of appropriate diameter and specification HPB300, and make limiting clamps 8 by laying out the steel bars; adjust the position of the pre-embedded rigid waterproof sleeve 1 by using the limiting clamps 8 to ensure that the pre-embedded rigid waterproof sleeve 1 is accurately aligned with the design center and that its end is flush with the surface of the existing fire water tank wall.

[0070] 12) Weld the limiting clamp 8 to the radial clamp 5 to form a stable steel cage; then spot weld the limiting clamp 8 to the pre-embedded rigid waterproof sleeve 1.

[0071] 13) Set up the template outside the hole, and use self-compacting non-shrink fine aggregate concrete with a strength one grade higher than the existing fire water tank wall concrete. Pour it through the bottom injection port until the self-compacting non-shrink fine aggregate concrete overflows from the overflow hole; after the pouring is completed, a secondary pouring non-shrink fine aggregate concrete ring 10 is formed.

[0072] 14) Curing of the secondary-cast non-shrink fine aggregate concrete ring 10, and removal of the formwork after molding;

[0073] 15) Apply cement-based penetrating crystalline waterproof coating to the inner wall of the existing fire water tank within a 200mm radius of the secondary cast non-shrink fine aggregate concrete ring 10; the dosage of cement-based penetrating crystalline waterproof coating is 1.6 kg / m². 2 The thickness is 1.1mm.

[0074] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A seepage-proof reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank, characterized in that, The system includes a pre-embedded rigid waterproof sleeve, a reinforcing cage, lapped short bars, a limiting clamp, a putty-type water-swellable sealing ring, and a secondary cast-in-place non-shrink fine aggregate concrete ring. The existing water tank sidewall is a reinforced concrete structure. Holes are made at the installation locations of the pre-embedded rigid waterproof sleeves, and the original longitudinal reinforcement is retained at the holes. The pre-embedded rigid waterproof sleeve is placed at the center of the hole, and a reinforcing cage is installed in the hole surrounding the pre-embedded rigid waterproof sleeve. A limiting clamp is installed between the two to position the pre-embedded rigid waterproof sleeve. The reinforcing cage is fixedly connected to the original longitudinal reinforcement through lapped short bars. A putty-type water-swellable sealing ring is installed at the center of the corresponding water tank sidewall at the interface between the old and new concrete surrounding the pre-embedded rigid waterproof sleeve. Concrete is poured in the hole surrounding the pre-embedded rigid waterproof sleeve with the reinforcing cage as the framework to form a secondary cast-in-place non-shrink fine aggregate concrete ring.

2. The seepage prevention and reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank according to claim 1, characterized in that, The steel cage consists of an inner ring reinforcing bar, a middle ring reinforcing bar, an outer ring reinforcing bar, and radial hoops. The inner ring reinforcing bar, the middle ring reinforcing bar, and the outer ring reinforcing bar are sequentially arranged in the annular space between the outer wall of the pre-embedded rigid waterproof sleeve and the interface between the old and new concrete. The three are connected by multiple radial hoops arranged circumferentially to form the steel cage.

3. The seepage prevention and reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank according to claim 1, characterized in that, The inner wall of the water tank is coated with a cement-based penetrating crystalline waterproof coating within the range of the secondary cast non-shrink fine aggregate concrete ring and its outer extension of 150-250mm.

4. The seepage prevention and reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank according to claim 1, characterized in that, The radius of the hole in the side wall of the pool is D / 2+(150~250)mm, where D is the diameter of the pre-embedded rigid waterproof sleeve.

5. The seepage prevention and reinforcement structure for adding a rigid waterproof sleeve to the sidewall of an existing water tank according to claim 1, characterized in that, The pre-embedded rigid waterproof sleeve is provided with a waterproof wing ring at its outer center.

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