Bottom plate anti-seepage structure and construction method thereof

Abstract

The invention provides a bottom plate anti-seepage structure which comprises a U-shaped plate, bent anchor pieces are arranged on the two sides of a notch of the U-shaped plate, flange plates are further arranged on the two sides of the U-shaped plate, and after a post-cast strip is formed in a pouring mode, the bottom of the U-shaped plate is connected with a coiled material waterproof layer arranged at the bottom of a concrete layer through a composite waterproof material layer. The bent anchor piece and the flange plate are poured in the concrete layer; and the cover plate covers the notch of the U-shaped plate in the retention period of the post-cast strip, and after the retention period of the post-cast strip is over, a cavity is formed between the cover plate and the U-shaped plate, and grouting materials are injected into the cavity. The U-shaped plate is synchronously poured into the post-cast strip in the forming process of the post-cast strip, gaps between new concrete and old concrete of the post-cast strip are filled with the U-shaped plate, and the waterproof and anti-seepage effects of the post-cast strip are improved in cooperation with a secondary waterproof material filling mode.

Description

Technical Field

[0001] The invention belongs to the field of anti-leakage structures, and in particular relates to a bottom plate anti-leakage structure and a construction method thereof. Background Art

[0002] A post-cast strip is a concrete strip left at the corresponding positions of the foundation slab, wall, or beam in accordance with design or construction specifications to prevent harmful cracks that may be caused by uneven shrinkage or settlement of the reinforced concrete structure during construction.

[0003] However, it is difficult to clean and roughen the traditional post-cast joints. Generally, the cleaning and roughening are not done properly, which can easily lead to leakage. In addition, due to the long retention time, the bottom waterproof layer is often damaged, and there will be two cold joints between the new and old concrete in the post-cast joints, which are weak links for leakage. Summary of the invention

[0004] The invention provides a bottom plate anti-leakage structure, aiming to solve the problem that leakage is easy to occur in the post-casting zone at present.

[0005] The present invention is implemented in this way: a bottom plate anti-leakage structure, comprising:

[0006] U-shaped plate, with bent anchors on both sides of the notch of the U-shaped plate, and flange plates on both sides of the U-shaped plate. After the post-casting strip is cast, the bottom of the U-shaped plate is connected to the roll waterproof layer provided at the bottom of the concrete layer through a composite waterproof material layer, and the bent anchors and flange plates are cast in the concrete layer;

[0007] A cover plate is provided, wherein the cover plate covers the notch of the U-shaped plate during the retention period of the post-cast strip. When the retention period of the post-cast strip expires, grouting material is injected into the cavity formed between the cover plate and the U-shaped plate.

[0008] Preferably, the U-shaped plate is provided with a lower through groove and an upper through groove, and structural steel bars are provided in the concrete layer and pass through the U-shaped plate through the lower through groove and the upper through groove, and the U-shaped plate is welded to the structural steel bars.

[0009] Preferably, an expansion water stop strip is provided at a position of the U-shaped plate away from the notch, the expansion water stop strip is arranged on the outer wall of the U-shaped plate, and the expansion water stop strip is cast in the concrete layer.

[0010] Preferably, the composite waterproof material layer includes an asphalt grease waterproof reinforcement layer and an propylene salt grouting material layer. The U-shaped plate is welded to the structural steel bars, and the asphalt grease waterproof reinforcement layer is filled between the bottom of the U-shaped plate and the rolled waterproof layer. After the retention period of the post-cast strip, the propylene salt grouting material that forms the propylene salt grouting material layer is injected into the bottom bulge provided at the bottom of the U-shaped plate.

[0011] Preferably, a grouting nozzle is provided on the bottom ridge, and the grouting nozzle penetrates the bottom of the U-shaped plate, and the propylene salt grouting material is injected into the gap between the U-shaped plate and the asphalt paste waterproof reinforcement layer through the grouting nozzle to form an propylene salt grouting material layer.

[0012] Preferably, the cover plate comprises an upper sealing plate and a side plate, the upper sealing plate is provided with an exhaust hole for exhausting air during the grouting process, and the side plate extends into the interior of the U-shaped plate.

[0013] Preferably, the inner wall of the U-shaped plate is provided with a limiting protrusion, the side plate is provided with a slot adapted to the limiting protrusion, and the side plate is snap-connected with the inner wall of the U-shaped plate.

[0014] The present invention also provides a method for constructing the bottom plate anti-leakage structure as described above, comprising:

[0015] Step 1: construct a base plate cushion layer on the building surface to be poured, and lay a waterproofing layer on the base plate cushion layer, and apply an asphalt jelly waterproofing reinforcement layer in the area where the post-casting strip is reserved; place a U-shaped plate on the asphalt jelly waterproofing reinforcement layer, wherein the U-shaped plate adopts a supporting facility to maintain the U-shaped plate perpendicular to the base plate cushion layer, and the asphalt jelly waterproofing reinforcement layer is tightly bonded to the bottom of the U-shaped plate; install an expansion water stop strip, and bond the expansion water stop strip to the outside of the U-shaped plate near the bottom of the U-shaped plate with a special adhesive;

[0016] Step 2: construct the surface steel bars required for the concrete layer on the bottom plate cushion layer, wherein the surface steel bars are formed by tying structural steel bars, and the structural steel bars respectively penetrate the lower through-groove and the upper through-groove, and the structural steel bars are fixed to the U-shaped plate by spot welding to prevent the U-shaped metal plate from deviating when pouring concrete;

[0017] The cover plate is temporarily covered on the notch of the U-shaped plate, and then the concrete material forming the concrete layer is poured on both sides of the U-shaped plate. After the pouring is completed, the cover plate is opened to flush the concrete inside the U-shaped plate. After the flushing is completed, the cover plate is covered on the U-shaped plate again to reduce the construction waste and dust from entering the U-shaped plate;

[0018] Step 3: After the structure settles and stabilizes, open the cover plate, clean the construction waste and dust in the cavity inside the U-shaped plate. If water is found in the cavity inside the U-shaped plate before pouring, drain the water away by drainage first; pour propylene salt grouting material through the grouting nozzle, and maintain constant pressure grouting; after the second grouting nozzle discharges slurry, keep constant pressure for 1-2 minutes to form a propylene salt grouting material layer. After the grouting is completed, seal the grouting nozzle with asphalt hemp silk, seal the lower through groove left by the structural steel bars installed in the U-shaped plate with polysulfide sealing paste, and apply epoxy resin steel adhesive on the inside of the U-shaped plate cavity;

[0019] Step 4: Finally, fill the U-shaped plate with grouting material. After the grouting material is filled, immediately cover the cover plate and knock on the cover plate to discharge the bubbles in the cavity through the vent hole. When the grouting material overflows from the vent hole on the top of the cover plate, it means that the internal grouting material has been poured densely. Observe for 15 days. After no leakage, the work is completed.

[0020] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0021] 1. The bottom plate anti-leakage structure provided by the present invention is synchronously cast into the post-casting strip during the formation process of the post-casting strip through the U-shaped plate, and the U-shaped plate is used as the inner lining of the post-casting strip. The overall structure is directly cast inside the post-casting strip during the grouting process of the post-casting strip. The gap between the new and old concrete of the post-casting strip is filled with the U-shaped plate, so as to avoid the rough structure and gap on the surface of the post-casting strip affecting the casting sealing and anti-leakage effect.

[0022] 2. The expansion water stop strip and asphalt paste waterproof reinforcement layer in the bottom plate anti-seepage structure provided by the present invention are formed before the concrete layer is poured, and serve as the main waterproof layer. After the structural settlement is stable, the propylene salt grouting material layer is used to fill the gap under the bottom of the U-shaped plate to further improve the waterproof penetration effect. The secondary waterproof material filling method is used to improve the waterproof effect of the waterproof layer, avoiding damage to the post-cast strip due to settlement or external damage during the retention period. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a bottom plate anti-leakage structure provided by the present invention.

[0024] Figure 2 It is a schematic diagram of a U-shaped plate structure of a bottom plate anti-leakage structure provided by the present invention.

[0025] Figure 3 The present invention provides a U-shaped plate and cover plate structure schematic diagram of a bottom plate anti-leakage structure.

[0026] Figure 4 It is a schematic diagram of the internal structure of a U-shaped plate of a bottom plate anti-leakage structure provided by the present invention.

[0027] Figure 5 It is a structural schematic diagram of a cover plate in a bottom plate anti-leakage structure provided by the present invention.

[0028] Figure 6 It is a schematic diagram of bent anchors with different structures in a bottom plate anti-leakage structure provided by the present invention.

[0029] Description of reference numerals:

[0030] 100, U-shaped plate; 101, lower through groove; 102, upper through groove; 103, bottom ridge; 110, bent anchor; 120, flange plate; 130, expansion water stop strip; 140, grouting nozzle;

[0031] 200, cover plate; 210, upper sealing plate; 220, side plate;

[0032] 300, structural steel bars 300;

[0033] 401. Rolled waterproofing layer; 402. Asphalt paste waterproofing reinforcement layer 402; 403. Acrylic salt grouting material layer; 404. Grouting material; 405. Concrete layer. DETAILED DESCRIPTION

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] The embodiment of the present invention provides a bottom plate anti-leakage structure, which is applied to the post-casting strip left in the concrete layer 405, such as Figure 1-Figure 6 As shown, the bottom plate anti-leakage structure comprises:

[0037] A U-shaped plate 100, wherein bent anchors 110 are provided on both sides of the notch of the U-shaped plate 100, and flange plates 120 are also provided on both sides of the U-shaped plate 100. After the post-casting strip is cast and formed, the bottom of the U-shaped plate 100 is connected to the roll waterproof layer 401 provided at the bottom of the concrete layer 405 through a composite waterproof material layer, and the bent anchors 110 and the flange plates 120 are cast in the concrete layer 405;

[0038] A cover plate is provided, wherein the cover plate covers the notch of the U-shaped plate 100 during the retention period of the post-cast strip. When the retention period of the post-cast strip expires, a cavity is formed between the cover plate and the U-shaped plate 100 and grouting material 404 is injected into the cavity.

[0039] The U-shaped plate 100 is provided with an expansion water stop strip 120 away from the notch, and the expansion water stop strip 120 is arranged on the outer wall of the U-shaped plate 100. The expansion water stop strip 120 is cast in the concrete layer 405. The composite waterproof material layer includes an asphalt jelly waterproof reinforcement layer 402 and an propylene salt grouting material layer 403. The U-shaped plate 100 is welded to the structural steel bar 300, and the asphalt jelly waterproof reinforcement layer 402 is filled between the bottom of the U-shaped plate 100 and the rolled waterproof layer 401. After the retention period of the post-cast strip, the propylene salt grouting material layer 403 is injected into the bottom bulge 103 provided at the bottom of the U-shaped plate 100. The propylene salt grouting material layer 403 fills the gap formed by the asphalt jelly waterproof reinforcement layer 402 and the bottom of the U-shaped plate 100 due to the layer drop.

[0040] In this embodiment, the U-shaped plate 100 is synchronously poured into the post-casting strip during the formation of the post-casting strip, and the U-shaped plate 100 is used as the inner lining of the post-casting strip, and the U-shaped plate 100 is used as the template of the post-casting strip to avoid the rough structure on the surface of the post-casting strip affecting the sealing and anti-leakage effect of the later casting, and the overall structure is directly cast inside the post-casting strip during the later post-casting strip filling process. Unlike the traditional template structure that needs to consider the problem of demolding, the U-shaped plate is used to fill the gap between the new and old concrete of the post-casting strip to avoid the gap in the post-casting strip affecting the casting sealing and anti-leakage effect; at the same time, the U-shaped plate 100 adopts the bent anchor 110 and the flange plate 120 structure to be cast together with the concrete layer 405 on both sides of the post-casting strip, and with the help of the bent anchor 110 and the flange plate 120, the connectivity of the U-shaped plate 100 with the filling layer formed by the concrete layer 405 and the grouting material 404 is enhanced;

[0041] The composite waterproof material layer at the bottom of the U-shaped plate 100 and the expansion water stop strip 130 at the outer wall of the U-shaped plate 100 enhance the anti-seepage effect. The expansion water stop strip 130 and the asphalt grease waterproof reinforcement layer 402 are formed before the concrete layer 405 is poured, and serve as the main waterproof layer. After the structural settlement is stable, the propylene salt grouting material layer 403 fills the gap below the bottom of the U-shaped plate 100 to further enhance the waterproof penetration effect. The secondary waterproof material filling method is used to enhance the waterproof effect of the waterproof layer, and avoid the post-casting belt from being damaged due to settlement or external damage during the retention period, resulting in later leakage.

[0042] It should be noted that, in order to facilitate understanding and observation, partial structures of the U-shaped plate 100 and the concrete layer 405 are cut off for demonstration. The length of the U-shaped plate 100 is usually 3-4 meters. After being welded together in several groups, it is added into the post-cast strip to match the length of the post-cast strip.

[0043] As a preferred implementation in this embodiment, the U-shaped plate 100 is provided with a lower through groove 101 and an upper through groove 102, and a structural steel bar 300 is provided in the concrete layer 405 and passes through the U-shaped plate 100 through the lower through groove 101 and the upper through groove 102, and the U-shaped plate 100 is welded to the structural steel bar 300;

[0044] In this embodiment, a surface layer of steel bars providing support is provided inside the concrete layer 405, and the surface layer of steel bars is formed by tying the structural steel bars 300. The U-shaped plate 100 is provided with a lower through groove 101 and an upper through groove 102 for accommodating the structural steel bars 300 to pass through. After the assembly is completed, the U-shaped plate 100 and the structural steel bars 300 are connected by spot welding.

[0045] As a preferred implementation in this embodiment, a grouting nozzle 140 is provided on the bottom bulge 103. After the structural settlement is stable, a gap is easily formed below the bottom bulge 103. The grouting nozzle 140 penetrates the bottom of the U-shaped plate 100, and the propylene salt grouting material is injected into the gap between the U-shaped plate 100 and the asphalt jelly waterproof reinforcement layer 402 through the grouting nozzle 140 to form an propylene salt grouting material layer 403;

[0046] As a preferred implementation in this embodiment, the cover plate 200 includes an upper sealing plate 210 and a side plate 220, the upper sealing plate 210 is provided with an exhaust hole for exhausting during the grouting process, and the side plate 220 extends into the interior of the U-shaped plate 100; the inner wall of the U-shaped plate 100 is provided with a limiting protrusion, and the side plate 220 is provided with a card groove adapted to the limiting protrusion, and the side plate 220 is connected to the inner wall of the U-shaped plate 100 by snapping, and the connection method of the cover plate 200 and the U-shaped plate 100 can also be fixed by bolts;

[0047] The side wall of the U-shaped plate 100 may adopt a wave-shaped or folded-line shaped unequal-surface structure, and the unequal-surface structure is used to enhance the connection strength between the U-shaped plate 100 and the concrete layer 405 and the filling layer;

[0048] like Figure 5 As shown, the curved anchor 110 may adopt a straight structure parallel to the waterproof roll material 401 or a straight structure inclined to the waterproof roll material 401, or a bending structure may be adopted at the end of the curved anchor 110 to enhance the stretching effect;

[0049] The present invention also provides a method for constructing the bottom plate anti-leakage structure as described above, comprising:

[0050] Step 1: construct a base plate cushion layer on the building surface to be poured, and lay a roll waterproof layer 401 on the base plate cushion layer, and apply an asphalt jelly waterproof reinforcement layer 402 in the area where the post-casting strip is reserved; place a U-shaped plate 100 on the asphalt jelly waterproof reinforcement layer 402, wherein the U-shaped plate 100 uses a supporting facility to maintain the U-shaped plate 100 perpendicular to the base plate cushion layer, and the asphalt jelly waterproof reinforcement layer 402 is tightly bonded to the bottom of the U-shaped plate 100; install an expansion water stop strip 130, and bond the expansion water stop strip 130 to the outside of the U-shaped plate 100 near the bottom of the U-shaped plate 100 with a special adhesive;

[0051] Step 2: construct the required surface steel bars of the concrete layer 105 on the bottom plate cushion layer. The surface steel bars are composed of structural steel bars 300 that are tied together. The structural steel bars 300 penetrate the lower through-groove 101 and the upper through-groove 102 respectively. The structural steel bars 300 are fixed to the U-shaped plate 100 by spot welding to prevent the U-shaped metal plate from being displaced when pouring concrete.

[0052] The cover plate 200 is temporarily covered on the notch of the U-shaped plate 100, and then the concrete material forming the concrete layer 405 is poured on both sides of the U-shaped plate 100. After the pouring is completed, the cover plate 200 is opened to flush the concrete inside the U-shaped plate 100. After the flushing is completed, the cover plate 200 is covered on the U-shaped plate 100 again to reduce the construction waste and dust from entering the U-shaped plate 100.

[0053] Step 3: After the structural settlement is stable, open the cover plate 200, clean the construction waste and dust in the inner cavity of the U-shaped plate 100, if water is found in the inner cavity of the U-shaped plate 100 before pouring, drain the water away by drainage first; pour propylene salt grouting material through the grouting nozzle 140, and maintain constant pressure grouting; after the second grouting nozzle 140 discharges slurry, keep constant pressure for 1 to 2 minutes to form a propylene salt grouting material layer 403, after the grouting is completed, seal the grouting nozzle 140 with asphalt hemp, seal the lower through groove 101 left by installing the structural steel bar 300 in the U-shaped plate 100 with polysulfide sealing paste, and apply epoxy resin steel adhesive on the inner side of the cavity of the U-shaped plate 100;

[0054] Step 4: Finally, fill the inner cavity of the U-shaped plate 100 with the grouting material 404. After the grouting material 404 is filled, immediately cover the cover plate 200 and knock the cover plate 200 to discharge the bubbles in the cavity through the vent holes. When the grouting material 404 overflows from the vent holes on the top of the cover plate, it means that the inner grouting material 404 has been poured densely. Observe for 7 to 15 days. After no leakage, the work is accepted as completed.

[0055] In this embodiment, the concrete grade used in the grouting material 404 is greater than the concrete grade used in the concrete layer 105 .

[0056] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A bottom plate anti-leakage structure, applied to the post-casting strip left in the concrete layer, characterized in that: include: U-shaped plate, with bent anchors on both sides of the notch of the U-shaped plate, and flange plates on both sides of the U-shaped plate. After the post-casting strip is cast, the bottom of the U-shaped plate is connected to the roll waterproof layer provided at the bottom of the concrete layer through a composite waterproof material layer, and the bent anchors and flange plates are cast in the concrete layer; A cover plate is provided, wherein the cover plate covers the notch of the U-shaped plate during the retention period of the post-cast strip. When the retention period of the post-cast strip expires, grouting material is injected into the cavity formed between the cover plate and the U-shaped plate.

2. A bottom plate anti-leakage structure according to claim 1, characterized in that: The U-shaped plate is provided with a lower through groove and an upper through groove, and structural steel bars are provided in the concrete layer and pass through the U-shaped plate through the lower through groove and the upper through groove, and the U-shaped plate is welded to the structural steel bars.

3. A bottom plate anti-leakage structure as claimed in claim 2, characterized in that: The U-shaped plate is provided with an expansion water stop strip away from the notch. The expansion water stop strip is arranged on the outer wall of the U-shaped plate and is cast in the concrete layer.

4. A bottom plate anti-leakage structure as claimed in claim 3, characterized in that: The composite waterproof material layer includes an asphalt grease waterproof reinforcement layer and an propylene salt grouting material layer. The U-shaped plate is welded to the structural steel bars, and the asphalt grease waterproof reinforcement layer is filled between the bottom of the U-shaped plate and the rolled waterproof layer. After the retention period of the post-cast strip, the propylene salt grouting material that forms the propylene salt grouting material layer is injected into the bottom bulge provided at the bottom of the U-shaped plate.

5. A bottom plate anti-leakage structure as claimed in claim 4, characterized in that: A grouting nozzle is provided on the bottom bulge, and the grouting nozzle penetrates the bottom of the U-shaped plate. The propylene salt grouting material is injected into the gap between the U-shaped plate and the asphalt paste waterproof reinforcement layer through the grouting nozzle to form an propylene salt grouting material layer.

6. A bottom plate anti-leakage structure as claimed in claim 5, characterized in that: The cover plate comprises an upper sealing plate and a side plate, wherein the upper sealing plate is provided with an exhaust hole for exhausting air during the grouting process, and the side plate extends into the interior of the U-shaped plate.

7. A bottom plate anti-leakage structure according to claim 6, characterized in that: The inner wall of the U-shaped plate is provided with a limiting protrusion, the side plate is provided with a clamping groove adapted to the limiting protrusion, and the side plate is clamped and connected with the inner wall of the U-shaped plate.

8. A construction method of the bottom plate anti-leakage structure according to claim 7, characterized in that: The construction method of the bottom plate anti-leakage structure comprises: Step 1: construct a base plate cushion layer and a waterproofing layer of rolled material on the building surface to be poured, apply an asphalt jelly waterproof reinforcement layer in the area where the post-casting strip is reserved, bond the bottom of the U-shaped plate to the asphalt jelly waterproof reinforcement layer, and bond the expansion water stop strip to the outside of the U-shaped metal plate; Step 2: construct surface layer steel bars on the bottom plate cushion layer through structural steel bars, the structural steel bars are welded to the U-shaped plate, concrete is poured on both sides of the U-shaped plate to form a concrete layer, and after the pouring is completed, a cover plate is covered on the U-shaped plate; Step 3: After the structure settles and stabilizes, open the cover plate and clean the inside of the U-shaped plate; inject propylene salt grouting material through the grouting nozzle to form an propylene salt grouting material layer; apply epoxy resin steel adhesive on the inside of the U-shaped plate cavity; Step 4: Finally, fill the internal cavity of the U-shaped plate with grouting material and cover it with a cover plate to complete the construction of the bottom plate anti-leakage structure.

9. A method for constructing a bottom plate anti-leakage structure according to claim 8, characterized in that: The concrete grade used in the grouting material is greater than the concrete grade used in the concrete layer.

Images