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

Abstract

The invention relates to an anti-seepage reinforcing structure of a newly-added rigid waterproof sleeve on the side wall of an existing pool and a construction method. 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] The invention relates to the field of civil engineering and waterproofing technology, and in particular to an anti-seepage reinforcement structure and a construction method for adding a rigid waterproof casing to the side wall of an existing pool. Background Art

[0002] In order to save construction costs and revitalize idle properties, the "reuse + renovation" measures are often adopted to renovate existing buildings to meet the requirements of current national standards. Among them, using existing fire water tanks to supply water can save a lot of construction costs. To take water from existing fire water tanks, it is necessary to drill holes in the side walls of the fire water tanks and install waterproof casings. Since the side walls of the water tanks need to withstand large lateral water pressure when full of water, in order to ensure that the side walls of the water tanks after drilling have sufficient impermeability and safety, corresponding anti-seepage and reinforcement measures must be taken to treat the side walls of the water tanks after drilling.

[0003] According to the National Building Standard Design Drawings, "Concrete Structure Reinforcement Construction" (13G311-1), after a hole is opened in a concrete structure, a new concrete layer is needed to protect and anchor the existing steel bars at the hole, and flat steel is attached around the hole to reinforce the reinforced concrete wall. This method is easy to operate, but does not involve the installation of rigid waterproof casings and wall anti-seepage treatment, and is only applicable to the reinforcement of new holes in conventional reinforced concrete walls.

[0004] The Chinese invention patent with the authorization announcement number CN 112538893 B discloses "a structure for opening a hole in the side wall of an existing water pool and passing a pipe through it". The pipe section is fixed to the hole in the wall of the existing water pool by pouring concrete twice, and the fixed steel bars are implanted into the wall of the existing water pool. The outer ring bars of the hole reinforcement are tied to the fixed steel bars, and the inner ring bars of the hole reinforcement are tied to the pipe section. The fixed steel bars and the outer ring bars of the hole reinforcement are all located in the reinforced concrete poured twice. It realizes opening a hole in the pool wall to connect the pipe when the pool is full of water or temporarily empty, and indirectly reinforces the pool wall after the hole is opened. However, when this method is used, the water-stop steel sheet on the casing and the reinforced concrete structure poured twice are both located on the outside of the side wall of the existing water pool, with poor integrity and weak anti-seepage performance; the indirect reinforcement measures are located in the compression zone on the outside of the pool wall, while the tension zone on the inside of the pool wall is not reinforced.

[0005] The Chinese utility model patent with the authorization announcement number CN 211342004 U discloses "a construction structure for reinforcing and leak-proofing a hole opened in the side wall of an old pool". The two ends of the newly added L-shaped steel bars are respectively welded to the steel waterproof sleeve and the steel bars cut off by the hole in the pool wall. A layer of slightly expanded secondary grouting material is filled between the steel waterproof sleeve and the concrete of the pool wall hole. There is a V-shaped ring groove on the inner wall of the concrete of the pool wall hole, and the slightly expanded secondary grouting material layer is embedded in the V-shaped ring groove. When using this method, the water stop ring on the steel waterproof sleeve is located on the inner and outer surfaces of the side wall of the existing pool, and there is no water stop strip at the interface between the new and old concretes, so the anti-seepage performance is weak; the steel waterproof sleeve and the steel bars cut off by the hole in the pool wall are indirectly connected, which is likely to cause deformation of the steel waterproof sleeve.

[0006] The Chinese utility model patent with the authorization announcement number CN 213809244 U discloses "a leak plugging structure between the pool wall and the pipe wall after a hole is opened in the pool wall". A square hole is opened in the side wall of the pool, and the three mutually connected steel plates and the wall-piercing bolts are used to reinforce the side wall after the hole is opened. A second through hole is opened in the third steel plate arranged on the pool wall on the water-facing side, and the circular water pipe passes through the second through hole and the square hole in the side wall of the pool; a waterproof material transition zone is arranged between the outer edge of the third steel plate and the pool wall on the water-facing side, and slightly expanded waterproof material is filled between the pipe wall of the circular water pipe and the first steel plate. The reinforcement effect on the side wall of the pool by using this method is remarkable, but it does not install a waterproof sleeve and there are bolts penetrating the side wall of the pool, so the anti-seepage performance is weak.

[0007] The Chinese utility model patent with the authorization announcement number CN 213929750 U discloses "a through-wall joint connection structure suitable for adding sleeves to pool-like structures later". The waterproof wing ring is placed on the outer side of the wall of the pool-like structure, and several planted steel bars are rooted in the wall of the pool-like structure around the hole; the circumferential steel bar cage is arranged around the outer periphery of the wall hole and is arranged around the outside of the waterproof sleeve; the on-site secondary cast concrete reinforcement body wraps the outer end of the waterproof sleeve, the outer ends of the waterproof wing ring, several planted steel bars and the circumferential steel bar cage, and forms a reinforced concrete structure reinforcement body; the inner surface of the reinforced concrete structure reinforcement body is closely attached to the outer surface (previously roughened) of the pool-like structure with a water-swelling water stop strip attached. This structure is similar to the Chinese invention patent with the 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 outer side of the pool-like structure, so the integrity is poor and the anti-seepage performance is weak; the reinforcement measures are located in the compression zone on the outer side of the pool wall, while the tension zone on the inner side of the pool wall is not reinforced.

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

[0009] The Chinese utility model patent with the authorization announcement number CN 202073192 U discloses a "reinforcement and anti-seepage structure for opening a hole in an existing reinforced concrete wall". It uses a double-wing ring sleeve, and the truncated steel bars in the reinforced concrete wall are welded to the double-wing ring, enabling the wing ring steel plate of the double-wing ring sleeve to have a certain strengthening effect on the side wall after the hole is opened. However, there is no water-stop strip at the interface between the new and old concretes, resulting in weak anti-seepage performance; the truncated steel bars in the reinforced concrete wall are welded to the double-wing ring, which is likely to cause deformation of the wing ring and the sleeve.

[0010] The Chinese invention patent with the authorization announcement number CN 110594493 B discloses a "structure and construction method for post-burying a sleeve in an existing pool wall". Its additional stirrups, annular additional steel bars, waterproof sleeve, and pre-buried annular steel plate are respectively fixed on the pool wall; the additional stirrups are connected to the annular additional steel bars; both ends of the waterproof sleeve are welded to the pre-buried annular steel plate; anchor bars are welded inside the pre-buried annular steel plate, and two concrete pouring holes are opened in the middle of the pre-buried annular steel plate. The secondary-cast reinforced concrete structure and the pre-buried annular steel plate have a good strengthening effect on the pool wall after the hole is opened; the wing ring of the waterproof sleeve and the water-swellable water-stop strip are located at the center of the pool wall section, having good anti-seepage performance. However, its construction process is relatively complex, and the two concrete pouring holes are on the same side in the middle of the pre-buried annular steel plate, which is not conducive to the secondary concrete pouring.

[0011] The above-listed structural forms all have certain defects and cannot completely solve the anti-seepage and reinforcement problems after adding a rigid waterproof sleeve to the side wall of an existing reinforced concrete fire pool. Therefore, a more safe, reasonable, economical, applicable, and convenient-to-construct structural form needs to be designed. Summary of the Invention

[0012] The present invention provides an anti-seepage and reinforcement structure and construction method for adding a rigid waterproof sleeve to the side wall of an existing pool. The part after adding the rigid waterproof sleeve has good anti-seepage performance, and the side wall of the pool after the hole is opened can withstand the lateral water pressure of the pool through reinforcement. The construction method is simple and has high use safety.

[0013] To achieve the above object, the present invention is realized by adopting the following technical solutions:

[0014] An anti-seepage reinforcement structure for adding a rigid waterproof sleeve to the side wall of an existing water tank, comprising a pre-embedded rigid waterproof sleeve, a steel reinforcement cage, overlapping short bars, a limit clamp, a putty-type water-swelling waterstop ring and a secondary-cast non-shrinking fine aggregate concrete ring; the side wall of the existing water tank is a reinforced concrete structure, a hole is opened at the installation position corresponding to the pre-embedded rigid waterproof sleeve, and the original longitudinal bars are reserved at the hole; the pre-embedded rigid waterproof sleeve is arranged at the center of the hole, a steel reinforcement cage is arranged in the hole outside the periphery of the pre-embedded rigid waterproof sleeve, and a limit clamp is arranged between the two to position the pre-embedded rigid waterproof sleeve through the limit clamp; the steel reinforcement cage is fixedly connected to the original longitudinal bars through overlapping short bars; a putty-type water-swelling waterstop ring is arranged at the center of the corresponding water tank side wall on the new-old concrete joint surface outside the periphery of the pre-embedded rigid waterproof sleeve; concrete is poured in the hole outside the periphery of the pre-embedded rigid waterproof sleeve with the steel reinforcement cage as the framework to form a secondary-cast non-shrinking fine aggregate concrete ring.

[0015] The steel reinforcement cage is composed of an inner ring reinforcement bar, a middle ring reinforcement bar, an outer ring reinforcement bar and a radial hoop; the inner ring reinforcement bar, the middle ring reinforcement bar and the outer ring reinforcement bar are sequentially arranged in the annular space between the outer wall of the pre-embedded rigid waterproof sleeve and the new-old concrete joint surface, and the three are connected by a plurality of radially arranged radial hoops to form a steel reinforcement cage.

[0016] Cementitious capillary crystalline waterproof coating is applied to the inner wall of the water tank within the secondary-cast non-shrinking fine aggregate concrete ring and within the range of 150 - 250 mm of its outward extension.

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

[0018] A waterproof wing ring is arranged outside the center of the periphery of the pre-embedded rigid waterproof sleeve.

[0019] A construction method for an anti-seepage reinforcement structure for adding a rigid waterproof sleeve to the side wall of an existing water tank comprises the following steps:

[0020] 1) Locate the embedding center of the newly added pre-embedded rigid waterproof sleeve on the side wall of the existing water tank, draw a circle with the embedding center as the center and D / 2 (where D is the radius of the pre-embedded rigid waterproof sleeve) as the radius to determine the installation position of the pre-embedded rigid waterproof sleeve; draw a circle with the embedding center as the center and D / 2+(150 - 250) mm as the radius to determine the hole size, and the inner wall of the hole is the position where the new-old concrete joint surface is located;

[0021] 2) Drill a hole at the position of the determined pre-embedded rigid waterproof sleeve to form a hole with a diameter the same as the nominal diameter D of the pre-embedded rigid waterproof sleeve; then chisel the concrete outside the hole until reaching the hole size, i.e., the new-old concrete joint surface; the original longitudinal bars are reserved when chiseling the concrete.

[0022] 3) Chisel the interface between the new and old concrete to make it rough, clean the interface between the new and old concrete with pressured water, and apply an interface agent.

[0023] 4) Fix a putty-type water-swelling waterstop ring with an outer diameter of D + (350 - 450) mm at the center position of the pool wall thickness through steel nails arranged at intervals. When fixing, the swelling surface of the putty-type water-swelling waterstop ring faces the existing concrete side.

[0024] 5) Through steel bar lofting, fabricate inner ring reinforcement bars, middle ring reinforcement bars, outer ring reinforcement bars, radial hoops, and lapping short bars.

[0025] 6) Place the embedded rigid waterproof casing into the pre-opened hole.

[0026] 7) Bend the ends of the original longitudinal bars into the hole and weld them to the lapping short bars for fixation.

[0027] 8) Bind and fix the middle ring reinforcement bars and the outer ring reinforcement bars located at the edge of the pool wall to the original longitudinal bars respectively.

[0028] 9) Adjust the positions of the radially arranged radial hoops at the set angles, and bind and fix the adjusted radial hoops to the middle ring reinforcement bars and the outer ring reinforcement bars located at the edge of the pool wall respectively.

[0029] 10) Bind and fix the inner ring reinforcement bars and the outer ring reinforcement bars located at the center of the pool wall to the radial hoops.

[0030] 11) Measure the distance between the embedded rigid waterproof casing and the radial hoops, and fabricate a limit clamp through steel bar lofting; adjust the position of the embedded rigid waterproof casing through the limit clamp to accurately position the center of the embedded rigid waterproof casing with the embedding center, and make the end flush with the pool wall surface.

[0031] 12) Weld and fix the limit clamp to the radial hoops to form a steel reinforcement cage; then spot-weld the limit clamp to the embedded rigid waterproof casing.

[0032] 13) Arrange formwork on the outside of the hole, and use self-compacting non-shrinking fine aggregate concrete with a strength higher than that of the existing pool reinforced concrete. Pour it through the injection port at the bottom until the self-compacting non-shrinking fine aggregate concrete overflows from the overflow hole; after pouring, a secondary pouring non-shrinking fine aggregate concrete ring is formed.

[0033] 14) Cure the secondary pouring non-shrinking fine aggregate concrete ring, and remove the formwork after it is formed.

[0034] 15) Apply a cementitious capillary crystalline waterproof coating on the inner wall of the pool within the secondary pouring non-shrinking fine aggregate concrete ring and its 150 - 250 mm outward extension range.

[0035] In step 2), the roughness depth after roughening the bonding surface between the new and old concrete is greater than 10 mm.

[0036] In step 4), the spacing of the steel nails ≤ 500 mm, the thickness of the putty type water-swelling waterstop ring ≥ 10 mm, and the width ≥ 30 mm.

[0037] In step 15), the dosage of the cementitious capillary crystalline waterproof coating is not less than 1.5 kg / m 2 , and the thickness is not less than 1.0 mm.

[0038] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0039] 1) Compared with the indirect reinforcement measures located outside the pool wall, the present invention expands the holes at the new added casing, forms a reinforced concrete ring through the reinforcement bars, radial hoops and secondary pouring, and directly reinforces the existing reinforced concrete pool wall after the holes are opened, significantly improving the structural safety.

[0040] 2) The waterproof wing ring of the embedded rigid waterproof casing and the putty type water-swelling waterstop ring are both located at the center of the pool wall thickness, significantly improving the anti-seepage ability of the two parts of the interface between the concrete and the rigid waterproof casing and the bonding surface between the new and old concrete.

[0041] 3) The original longitudinal bars of the existing reinforced concrete pool wall are used to fix the hole reinforcement bars and radial hoops, and a limit clamp is used to fix the embedded rigid waterproof casing, finally forming a stable steel reinforcement cage. When pouring concrete, the embedded rigid waterproof casing will not move out of position; the embedded rigid waterproof casing is not directly connected to the stress longitudinal bars of the pool wall, does not bear the lateral water pressure, and will not deform.

[0042] 4) The construction method is simple. After form removal, the bonding between the new and old concrete is good. The integral property of the secondary poured non-shrinking fine aggregate concrete ring is good. The surface of the existing pool side wall is flat after secondary pouring; the cementitious capillary crystalline waterproof coating is used to treat the inner wall of the pool within the surrounding area, and the anti-seepage performance is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is the elevation view of the hole opening when adding a rigid waterproof casing to the side wall of the existing pool described in the present invention.

[0044] Figure 2 is the elevation view of the reinforcement structure when adding a rigid waterproof casing to the side wall of the existing pool described in the present invention.

[0045] Figure 3 is the sectional view of the reinforcement structure when adding a rigid waterproof casing to the side wall of the existing pool described in the present invention.

[0046] In the figure: 1. Embedded rigid waterproof casing; 2. Inner ring stiffening rib; 3. Middle ring stiffening rib; 4. Outer ring stiffening rib; 5. Radial hoop; 6. Original longitudinal reinforcement; 7. Lapping short reinforcement; 8. Limit clamp; 9. Putty type water-swelling waterstop ring; 10. Secondary casting non-shrinking fine aggregate concrete ring; 11. Interface between new and old concrete; 12. Waterproof wing ring Specific implementation mode

[0047] The following further explains the specific implementation mode of the present invention with reference to the attached drawings:

[0048] As Figures 1-3 shown, the anti-seepage reinforcement structure for adding a rigid waterproof casing to the side wall of an existing water tank of the present invention includes an embedded rigid waterproof casing 1, a steel reinforcement cage, a lapping short reinforcement 7, a limit clamp 8, a putty type water-swelling waterstop ring 9 and a secondary casting non-shrinking fine aggregate concrete ring 10; the side wall of the existing water tank is a reinforced concrete structure, a hole is opened at the installation position corresponding to the embedded rigid waterproof casing 1, and the original longitudinal reinforcement 6 is reserved at the hole; the embedded rigid waterproof casing 1 is arranged at the center of the hole, a steel reinforcement cage is arranged in the hole outside the periphery of the embedded rigid waterproof casing 1, and a limit clamp 8 is arranged between the two to position the embedded rigid waterproof casing 1 through the limit clamp 8; the steel reinforcement cage is fixedly connected with the original longitudinal reinforcement 6 through the lapping short reinforcement 7; a putty type water-swelling waterstop ring 9 is arranged at the interface between the new and old concrete 11 corresponding to the center of the side wall of the water tank outside the periphery of the embedded rigid waterproof casing 1; concrete is poured in the hole outside the periphery of the embedded rigid waterproof casing 1 with the steel reinforcement cage as the framework to form a secondary casting non-shrinking fine aggregate concrete ring 10.

[0049] The steel reinforcement cage is composed of an inner ring stiffening rib 2, a middle ring stiffening rib 3, an outer ring stiffening rib 4 and a radial hoop 5; the inner ring stiffening rib 2, the middle ring stiffening rib 3 and the outer ring stiffening rib 4 are sequentially arranged in the annular space between the outer wall of the embedded rigid waterproof casing 1 and the interface between the new and old concrete 11, and the three are connected by a plurality of radially arranged radial hoops 5 to form a steel reinforcement cage.

[0050] Cementitious capillary crystalline waterproof coating is applied to the inner wall of the water tank within the secondary casting non-shrinking fine aggregate concrete ring 10 and within the range of 150 - 250 mm of its outward expansion.

[0051] The radius of the hole opened in the side wall of the water tank is D / 2 + (150 - 250) mm, where D is the diameter of the embedded rigid waterproof casing 1.

[0052] A waterproof wing ring 12 is arranged outside the center of the periphery of the embedded rigid waterproof casing 1.

[0053] A construction method for the anti-seepage reinforcement structure for adding a rigid waterproof casing to the side wall of an existing water tank includes the following steps:

[0054] 1) Locate the embedding center of the newly added embedded rigid waterproof sleeve 1 on the side wall of the existing pool. Taking the embedding center as the center of the circle and the radius D / 2 of the embedded rigid waterproof sleeve 1 as the radius, draw a circle to determine the installation position of the embedded rigid waterproof sleeve 1; taking the embedding center as the center of the circle and the radius D / 2+(150 - 250)mm as the radius, draw a circle to determine the hole size, and the inner wall of the hole is the position where the new and old concrete joint surface 11 is located;

[0055] 2) Drill a hole at the position of the determined embedded rigid waterproof sleeve 1 to form a hole with a diameter equal to the nominal diameter D of the embedded rigid waterproof sleeve 1; then chisel the concrete outside the hole until the hole size is reached, that is, the new and old concrete joint surface 11; keep the original longitudinal bars 6 when chiseling the concrete;

[0056] 3) Chisel the new and old concrete joint surface 11 rough, clean the new and old concrete joint surface 11 with pressure water, and apply an interface agent;

[0057] 4) Fix the putty - type water - swelling water stop ring 9 with an outer diameter of D+(350 - 450)mm at the center position of the pool wall thickness through steel nails arranged at intervals. When fixing, the swelling surface of the putty - type water - swelling water stop ring 9 faces the existing concrete side;

[0058] 5) Through steel bar lofting, fabricate the inner - ring reinforcement 2, middle - ring reinforcement 3, outer - ring reinforcement 4, radial hoop 5 and lapping short bar 7;

[0059] 6) Place the embedded rigid waterproof sleeve 1 into the opened hole;

[0060] 7) Bend the ends of the original longitudinal bars 6 into the hole and weld them to the lapping short bars 7 for fixation;

[0061] 8) Bind and fix the middle - ring reinforcement 3 and the outer - ring reinforcement 4 located at the edge of the pool wall to the original longitudinal bars 6 respectively;

[0062] 9) Adjust the position of the radially arranged radial hoops 5 at the set angle, and bind and fix the adjusted radial hoops 5 to the middle - ring reinforcement 3 and the outer - ring reinforcement 4 located at the edge of the pool wall respectively;

[0063] 10) Bind and fix the inner - ring reinforcement 2 and the outer - ring reinforcement 4 located at the center of the pool wall to the radial hoops 5;

[0064] 11) Measure the distance between the embedded rigid waterproof sleeve 1 and the radial hoops 5, and fabricate a limit clamp 8 through steel bar lofting; adjust the position of the embedded rigid waterproof sleeve 1 through the limit clamp 8 so that the center of the embedded rigid waterproof sleeve 1 is accurately positioned with the embedding center, and the end is flush with the pool wall surface;

[0065] 12) Weld and fix the limit clamp 8 and the radiation clamp 5 to form a steel reinforcement cage; then spot-weld and fix the limit clamp 8 and the embedded rigid waterproof casing 1.

[0066] 13) Arrange formwork on the outside of the hole, and use self-compacting non-shrinking fine aggregate concrete with a strength higher than that of the existing pool reinforced concrete. Pour it through the injection port at the bottom until the self-compacting non-shrinking fine aggregate concrete overflows from the overflow hole; after pouring, a secondary pouring non-shrinking fine aggregate concrete ring 10 is formed.

[0067] 14) Cure the secondary pouring non-shrinking fine aggregate concrete ring 10, and remove the formwork after it is formed.

[0068] 15) Apply a cementitious capillary crystalline waterproof coating on the inner wall of the pool within the secondary pouring non-shrinking fine aggregate concrete ring 10 and its 150 - 250 mm outward extension range.

[0069] In step 2), the rough depth after chiseling the old and new concrete joint surface 11 is greater than 10 mm.

[0070] In step 4), the spacing of the steel nails ≤ 500 mm, the thickness of the putty-type water-swellable waterstop ring 9 ≥ 10 mm, and the width ≥ 30 mm.

[0071] In step 15), the dosage of the cementitious capillary crystalline waterproof coating is not less than 1.5 kg / m 2 , and the thickness is not less than 1.0 mm.

[0072] It should be understood that in the present invention, terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0073] To more intuitively reflect the present invention, the implementation manner of the present invention will be further described in combination with embodiments. The following embodiments are only the preferred specific implementation manners of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solutions that can be obviously obtained by those skilled in the art within the technical scope disclosed by the present invention, including simple changes or equivalent replacements, are within the protection scope of the present invention.

[0074]

Embodiment

[0075] In this embodiment, a pre-embedded rigid waterproof casing is newly added to the side wall of the existing reinforced concrete fire pool, and an anti-seepage and reinforcement structure is provided. The objects involved in the construction process include: pre-embedded rigid waterproof casing 1, inner ring reinforcement 2, middle ring reinforcement 3, outer ring reinforcement 4, radial hoop 5, original longitudinal reinforcement 6, lapping short reinforcement 7, limit clamp 8, putty-type water-swellable water stop ring 9, and secondary-poured non-shrinking fine aggregate concrete ring 10.

[0076] In this embodiment, around the periphery of the pre-embedded rigid waterproof casing 1, a steel reinforcement cage is jointly formed by the inner ring reinforcement 2, middle ring reinforcement 3, outer ring reinforcement 4 and radial hoop 5, and the pre-embedded rigid waterproof casing 1 is fixed in the newly opened hole in the pool wall; the original longitudinal reinforcement 6 of the existing reinforced concrete fire pool is retained, and the end of the original longitudinal reinforcement 6 is bent into the hole and welded and fixed to the lapping short reinforcement 7; the putty-type water-swellable water stop ring 9 is fixed at the center position of the pool wall thickness; the secondary-poured non-shrinking fine aggregate concrete ring 10 is located between the pre-embedded rigid waterproof casing 1 and the new-old concrete interface 11; the inner wall of the pool within the secondary-poured non-shrinking fine aggregate concrete ring 10 and its 200 mm outward extension range is coated with cementitious capillary crystalline waterproof coating.

[0077] The specific construction process includes the following steps:

[0078] 1) On the pool wall of the existing reinforced concrete fire pool (referred to as the existing fire pool), locate the position of the center line of the newly added pre-embedded rigid waterproof casing, and take this as the center of the circle, draw a circle with a radius of 250 mm, which is the radius of the newly added DN500 pre-embedded rigid waterproof casing, to determine its specific installation position; draw a circle with a radius of 450 mm to determine the range of concrete chiseling, that is, the position of the new-old concrete interface 11;

[0079] 2) Drill holes at the determined position of the pre-embedded rigid waterproof casing to form a hole with a diameter the same as the nominal diameter of the pre-embedded rigid waterproof casing (D = 500 mm); chisel the concrete between the hole on the pool wall of the existing fire pool and the determined new-old concrete interface 11, and retain the original longitudinal reinforcement 6 to form the pouring area of the secondary-poured non-shrinking fine aggregate concrete ring 10;

[0080] 3) Chisel the new-old concrete interface 11 on the pool wall of the existing fire pool to a rough depth of 12 mm, clean the new-old concrete interface with pressurized water, and apply an interface agent to ensure the quality and reliability of the connection interface;

[0081] 4) Fix the putty-type water-swellable water stop ring 9 with a thickness of 10 mm, a width of 30 mm, and an outer diameter of 900 mm to the center position of the pool wall thickness (the pool wall thickness is t) through steel nails with a spacing of 500 mm. When fixing, the swelling surface of the putty-type water-swellable water stop ring 9 faces the existing concrete;

[0082] 5) Select steel bars with the same diameter and strength grade as the original longitudinal bars 6. Through steel bar lofting, fabricate the inner ring reinforcement bars 2, middle ring reinforcement bars 3, outer ring reinforcement bars 4 and lapping short bars 7. Among them, the mutual anchoring length of the formed circular reinforcement bars ≥ 40d (d is the diameter of the original longitudinal bars 6); Select steel bars with the specification of HPB300 and a diameter of 12 mm, and fabricate the radial hoops 5 through steel bar lofting;

[0083] 6) Place the embedded rigid waterproof casing 1 into the pre-opened hole;

[0084] 7) Bend the 100 - mm part at the end of the original longitudinal bars 6 into the hole and weld it fixedly with the lapping short bars 7;

[0085] 8) Bind and fix the middle ring reinforcement bars 3 and the outer ring reinforcement bars 4 at the edge of the pool wall (in the thickness direction) to the original longitudinal bars 6 respectively;

[0086] 9) Adjust the positions of the radial hoops 5 in a radial pattern at an interval of 30° angles, and bind and fix the adjusted radial hoops 5 to the middle ring reinforcement bars 3 and the outer ring reinforcement bars 4 at the edge of the pool wall (in the thickness direction) respectively;

[0087] 10) Bind and fix the inner ring reinforcement bars 2 and the outer ring reinforcement bars 4 at the center of the pool wall (in the thickness direction) to the radial hoops 5;

[0088] 11) According to the size of the gap between the embedded rigid waterproof casing 1 and the radial hoops 5, select steel bars with an appropriate diameter and the specification of HPB300, and fabricate the limit retaining rings 8 through steel bar lofting; Adjust the position of the embedded rigid waterproof casing 1 through the limit retaining rings 8 to ensure the accurate alignment of the embedded rigid waterproof casing 1 with the embedding center, and ensure that its end is flush with the surface of the existing fire pool wall;

[0089] 12) Weld the limit retaining rings 8 fixedly to the radial hoops 5 to form a stable steel reinforcement cage; Then spot - weld the limit retaining rings 8 to the embedded rigid waterproof casing 1.

[0090] 13) Arrange the formwork outside the hole, and use self - compacting non - shrinkage fine aggregate concrete with a strength one grade higher than that of the existing fire pool wall concrete. Pour it through the bottom injection port until the self - compacting non - shrinkage fine aggregate concrete overflows from the overflow hole; After pouring, the secondary - poured non - shrinkage fine aggregate concrete ring 10 is formed;

[0091] 14) Cure the secondary - poured non - shrinkage fine aggregate concrete ring 10, and remove the formwork after it is formed;

[0092] 15) Brush the cement - based penetrating crystalline waterproof coating on the inner wall of the existing fire pool within the secondary - poured non - shrinkage fine aggregate concrete ring 10 and its 200 - mm outer - extended range; The dosage of the cement - based penetrating crystalline waterproof coating is 1.6 kg / m 2, with a thickness of 1.1 mm.

[0093] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An anti-seepage reinforcement structure with a newly added rigid waterproof casing on the side wall of an existing pool, characterized in that: It includes a pre-buried rigid waterproof casing, a steel cage, overlapping short bars, a limiting clamp, a putty-type water-swelling water-stop ring and a secondary cast non-shrinkage fine stone concrete ring; the existing side wall of the water tank is a reinforced concrete structure, and a hole is opened at the installation position corresponding to the pre-buried rigid waterproof casing, and the original longitudinal bars are retained at the hole; the pre-buried rigid waterproof casing is arranged at the center of the hole, and a steel cage is arranged in the hole outside the pre-buried rigid waterproof casing, and a limiting clamp is arranged between the two, and the pre-buried rigid waterproof casing is positioned by the limiting clamp; the steel cage is fixedly connected to the original longitudinal bars by overlapping short bars; a putty-type water-swelling water-stop ring is arranged at the center of the corresponding water tank side wall at the new and old concrete bonding surface outside the pre-buried rigid waterproof casing; concrete is cast in the hole outside the pre-buried rigid waterproof casing with the steel cage as the skeleton to form a secondary cast non-shrinkage fine stone concrete ring.

2. The anti-seepage reinforcement structure of an existing pool side wall with a newly added rigid waterproof casing according to claim 1, characterized in that: The steel cage is composed of inner ring reinforcement ribs, middle ring reinforcement ribs, outer ring reinforcement ribs and radial hoops; the inner ring reinforcement ribs, middle ring reinforcement ribs and outer ring reinforcement ribs are arranged in sequence in the annular space between the outer wall of the embedded rigid waterproof casing and the joint surface of the new and old concrete, and the three are connected by multiple radial hoops arranged along the circumference to form a steel cage.

3. The anti-seepage reinforcement structure of an existing pool side wall with a newly added rigid waterproof sleeve according to claim 1, characterized in that: The secondary pouring non-shrinkage fine stone concrete ring and its outer expansion range of 150 to 250 mm are coated with cement-based penetrating crystalline waterproof coating on the inner wall of the pool.

4. The anti-seepage reinforcement structure of an existing pool side wall with a newly added rigid waterproof casing according to claim 1, characterized in that: The radius of the hole opened in the side wall of the pool is D / 2+(150-250) mm, where D is the diameter of the pre-buried rigid waterproof casing.

5. The anti-seepage reinforcement structure of an existing pool side wall with a newly added rigid waterproof casing according to claim 1, characterized in that: A waterproof wing ring is arranged outside the center of the periphery of the pre-buried rigid waterproof casing.

6. A construction method for an anti-seepage reinforcement structure of a newly added rigid waterproof casing on the side wall of an existing pool as claimed in any one of claims 1 to 5, characterized in that: The steps include: 1) Locate the burial center of the newly embedded rigid waterproof casing on the side wall of the existing pool, draw a circle with the burial center as the center and the radius D / 2 of the embedded rigid waterproof casing as the radius to determine the installation position of the embedded rigid waterproof casing; draw a circle with the burial center as the center and the radius D / 2+(150~250)mm as the radius to determine the hole size, and the inner wall of the hole is the location of the bonding surface between the new and old concrete; 2) Drill a hole at the determined location of the pre-buried rigid waterproof casing to form a hole with a diameter equal to the nominal diameter D of the pre-buried rigid waterproof casing; then chisel away the concrete around the hole until the hole size, i.e., the interface between the new and old concrete, is reached; the original longitudinal reinforcement is retained when chiseling away the concrete; 3) Roughen the interface between the new and old concrete, clean it with pressurized water, and apply interface agent; 4) Fix the putty-type water-swellable water-stop ring with an outer diameter of D+(350-450) mm at the center of the pool wall thickness through steel nails arranged at intervals, and when fixing, the expansion surface of the putty-type water-swellable water-stop ring faces the existing concrete side; 5) Through steel bar lofting, inner ring reinforcement, middle ring reinforcement, outer ring reinforcement, radial hoops and lap short reinforcement are made; 6) Place the embedded rigid waterproof casing into the opened hole; 7) Bend the end of the original longitudinal reinforcement into the hole and weld it to the overlapping short reinforcement; 8) Tie and fix the middle ring reinforcement and the outer ring reinforcement at the edge of the pool wall to the original longitudinal reinforcement respectively; 9) Adjust the positions of the radially arranged radial hoops according to the set angles, and tie and fix the adjusted radial hoops to the middle ring reinforcement ribs and the outer ring reinforcement ribs located at the edge of the pool wall respectively; 10) Tie and secure the inner ring reinforcement, the outer ring reinforcement located at the center of the pool wall and the radial hoop; 11) Measure the distance between the embedded rigid waterproof casing and the radial hoop, and make a limit clamp by steel bar layout; adjust the position of the embedded rigid waterproof casing by the limit clamp, so that the center of the embedded rigid waterproof casing is accurately positioned with the embedding center, and the end is flush with the pool wall surface; 12) Weld the limit clamp and the radial hoop to form a steel cage; then spot weld the limit clamp and the embedded rigid waterproof casing; 13) Arrange the formwork outside the hole, use self-compacting non-shrinkage fine stone concrete with higher strength than the existing water tank reinforced concrete, and pour it through the injection port at the bottom until the poured self-compacting non-shrinkage fine stone concrete overflows from the overflow hole; After pouring is completed, a secondary pouring non-shrinkage fine stone concrete ring is formed; 14) Maintain the secondary cast non-shrinkage fine stone concrete ring and remove the formwork after forming; 15) Apply cement-based penetrating crystalline waterproof coating on the inner wall of the pool within the range of 150 to 250 mm of the secondary cast non-shrinkage fine stone concrete ring and its outer expansion.

7. The construction method of the anti-seepage reinforcement structure of adding a rigid waterproof casing to the side wall of an existing pool according to claim 6, characterized in that: In the step 2), the rough depth of the interface between the new and old concrete is greater than 10 mm after roughening.

8. The construction method of the anti-seepage reinforcement structure of adding a rigid waterproof casing to the side wall of an existing pool according to claim 6, characterized in that: In the step 4), the spacing between the steel nails is ≤500 mm, and the thickness of the putty-type water-swellable water-stop ring is ≥10 mm and the width is ≥30 mm.

9. The construction method of the anti-seepage reinforcement structure of adding a rigid waterproof casing to the side wall of an existing pool according to claim 6, characterized in that: In the step 15), the amount of cement-based penetrating crystalline waterproof coating is not less than 1.5 kg / m 2 , thickness not less than 1.Omm.

Images