A construction method for a building water-stop inverted beam

Abstract

The present invention discloses a construction method for a building water-stop counter beam. A plurality of brackets two made of waste steel bars on-site are welded at the positions of the water-stop counter beam marked on the floor slab steel bar framework. The side forms are placed on the plurality of brackets two, and the left and right side forms are respectively pressed against the left and right outer sides of two steel bars two on the brackets two. Then, two square timbers are respectively embedded between the left and right side forms and the bent parts of the steel bar one, so that the left and right square timbers tightly squeeze the left and right side forms. The upper parts of the two side forms are fixed with tension bolts, and then the floor slab concrete is poured. Before the floor slab concrete starts to set, the water-stop counter beam concrete is poured. In this application, the bent part of the steel bar one in the bracket two is located at the upper edge of the steel bar three, and this bent part is exposed on the upper surface of the floor slab. The exposed bent part of the steel bar one can be buried in the mortar layer through subsequent paving work without the need for cutting, which saves time and effort and has a relatively low construction cost.

Description

Technical Field

[0001] The present invention relates to the field of building construction, and more specifically, to a construction method for a building water-stop inverted beam. Background Art

[0002] A water-stop inverted beam generally refers to an inverted beam or an inverted plain concrete water-stop belt provided at the root of a wall when a water-containing room such as a kitchen or a bathroom is isolated from the outside. Most of the water-stop inverted beams in kitchens and bathrooms are cast in secondary structures. When casting the concrete of the water-stop inverted beam on the already constructed floor slab, it is a combination of new and old concretes. If the joint treatment is not good, leakage is likely to occur, directly affecting the later installation and construction effects. For example, in a precast member of a water-stop inverted beam and a construction method of a water-stop inverted beam proposed in a Chinese patent with the application number 201910009894.3, the width of the precast member and the water-stop inverted beam is defined by the side plates on both sides. The rib plates are used to connect the two side plates on both sides of the precast member. There is a groove between the rib plates and the side plates. On the one hand, it is convenient for the water-stop inverted beam to be cast and engaged with the opening stirrups. On the other hand, the lower end of the cast water-stop inverted beam is integral, increasing the anti-seepage effect. The setting of the tongue-and-groove is convenient for the precast members to be engaged together, and the adjacent precast members are connected by passing the tension bolts through the reserved holes on both sides. The steel bars are used to connect with the beam at the lower end of the water-stop inverted beam.

[0003] Although the above technical solution solves the problems that when casting the existing water-stop inverted beam, the formwork needs to be disassembled, and the construction efficiency is low and the cost is high, the formed concrete of the made water-stop inverted beam has a good appearance, a high one-time forming efficiency, good waterproof performance, and there is no need to demold the water-stop inverted beam. However, when prefabricating these members, the formwork erection and demolding work of the precast members are still required, and it is also necessary to wait for solidification and cure them, increasing the prefabrication cost. The precast members need to be installed at the site. The water-stop inverted beam is cast and formed between the two precast side plates. The precast side plates and the concrete of the water-stop inverted beam are a combination of new and old concretes. If the joint surface is not treated well, there will be a gap between them, affecting the integrity of the water-stop inverted beam. The above application also mentions that when the structural concrete reaches the initial setting, the concrete of the water-stop inverted beam is cast again. In this way, a cold joint may be generated between the structural concrete and the concrete of the water-stop inverted beam, and it is easy to seep water.

[0004] In order to solve the problem of leakage caused by poor joint treatment when casting the secondary structure of the water-stop inverted beam, and the problem of the deviation of the position of the inverted beam when the water-stop inverted beam and the floor slab concrete are cast at one time, the existing "Construction Method for One-time Casting of Kitchen and Bathroom Water-stop Inverted Beams and Floor Concrete" uses the waste steel bar heads on the site to weld small "I-shaped" supports and weld them with the cast-in-place floor slab steel bars, as Figure 7 、 Figure 8 and Figure 9As shown in the figure, the third steel bar 13 is welded between two first steel bars 11, and two second steel bars 12 are vertically welded on the third steel bar 13 to form an "I-shaped" support 1. One support 1 is arranged about one meter longitudinally along the beam, and the square timber 2 and the side form 4 of the water stop inverted beam 5 are firmly fixed between the first steel bar 1 and the second steel bar 6. Then, the top of the side form 4 is fixed with the lath 3. After the concrete of the floor slab 8 is poured and vibrated, the concrete of the water stop inverted beam 5 is poured. After the concrete of the floor slab 8 and the water stop inverted beam 4 solidifies and cures, the formwork is removed.

[0005] Although the above method solves the problems of leakage caused by poor joint treatment during the casting of the secondary structure of the water stop inverted beam and the deviation of the position of the inverted beam during the one-time casting of the concrete of the water stop inverted beam and the floor slab, after the formwork is removed, in order to prevent affecting the waterproof construction and tile paving of the kitchen and bathroom floors, it is necessary to cut off the exposed parts of the first steel bars one by one, which is time-consuming and laborious. Summary of the Invention

[0006] Technical Problem to be Solved

[0007] The present invention provides a construction method for a building water stop inverted beam, which is simple in construction and low in cost, and also solves the problems of water seepage at the joint between the water stop inverted beam and the floor slab and the time-consuming and laborious post-construction treatment after the construction of the water stop inverted beam.

[0008] Technical Solution

[0009] To achieve the above object, the present invention provides a construction method for a building water stop inverted beam. The specific construction method steps are as follows:

[0010] S1: After the welding of the floor slab steel bar skeleton is completed, a plurality of second supports are fabricated. Two first steel bars are bent into a V shape and inverted, and the lower edges of the bending starting points of the two first steel bars are respectively welded to the upper edges of the two ends of the third steel bar. Two second steel bars are arranged parallel to each other and symmetrically welded to the upper middle part of the third steel bar to form the second support;

[0011] S2: A plurality of second supports are welded to the floor slab steel bar skeleton along the length direction of the water stop inverted beam, and the axes of the plurality of second supports coincide;

[0012] S3: The side form is supported, and the side form is placed on the plurality of second supports, and the left and right side forms on both sides are respectively close to the left and right outer sides of the two second steel bars on the second support;

[0013] S4: Two square timbers are respectively embedded between the left and right side forms and the bent parts of the first steel bars, so that the left and right square timbers squeeze the left and right side forms;

[0014] S5: The upper parts of the left and right side forms are fixed with the tension bolts;

[0015] S6: After the concrete of the floor slab is poured and vibrated compactly and before the initial setting of the concrete of the floor slab, the concrete of the water stop inverted beam is poured between the two side forms on both sides;

[0016] S7: Use an inserted vibrator to vibrate the concrete of the water stop inverted beam until it is dense;

[0017] S8: Level and smooth the upper surfaces of the concrete of the water stop inverted beam and the floor slab;

[0018] S9: After the concrete of the water stop inverted beam and the floor slab reaches the design strength, remove the side forms on the left and right sides of the water stop inverted beam and the formwork of the floor slab;

[0019] S10: Cure the concrete of the water stop inverted beam and the floor slab.

[0020] Preferably, the diameters of the first steel bar, the second steel bar, and the third steel bar are all 8 mm. The distance between the outer sides of the two second steel bars in the second support is the same as the width of the water stop inverted beam. The distance in the width direction of the water stop inverted beam between the bent part of the first steel bar on the third steel bar and the second steel bar in the second support is the same as the sum of the thicknesses of the side form and the square timber.

[0021] Preferably, the interval distance of the second support along the length direction of the water stop inverted beam is 1 m. The specific installation steps of the second support in S2 are as follows:

[0022] S2.1: According to the design requirements, make positioning marks of the water stop inverted beam on the floor slab steel bar framework;

[0023] S2.2: Use a level to control the upper edges of the third steel bars in the two second supports at the head and tail ends of the water stop inverted beam on the same elevation plane respectively, and weld the two second supports at the head and tail ends of the water stop inverted beam to the floor slab steel bar framework through the lower part of the first steel bar respectively;

[0024] S2.3: Pull a positioning line between the two second supports and at the welding points of their two second steel bars and third steel bars, and use a level to control the two fixed ends of the two positioning lines on the same elevation plane;

[0025] S2.4: According to the position of the positioning line, weld multiple second supports to the floor slab steel bar framework every 1 m.

[0026] Preferably, the material of the side form is bamboo plywood with a thickness of 20 mm.

[0027] Preferably, screw slots are correspondingly opened every 1 m along the length direction of the upper edges of the left and right side forms of the water stop inverted beam.

[0028] Preferably, the tie bolt includes a fastener and a screw rod. Two fasteners are provided and are respectively threadedly connected to both ends of the screw rod. The specific construction method steps for fixing the upper part of the side form in S5 are as follows:

[0029] S5.1: First, complete the opening of the screw grooves on the upper edges of the side forms before setting up the side forms.

[0030] S5.2: Set up the side forms and align the screw grooves on the upper edges of the left and right side forms.

[0031] S5.3: Place the screws in the left and right screw grooves.

[0032] S5.4: Tighten the fasteners at both ends of the screw towards the side form, and make the distance between the inner sides of the upper part of the side form the same as the width of the water stop beam.

[0033] Preferably, the two docking ends of the side form are respectively set as a tongue-and-groove and a protrusion adapted to the size of the tongue-and-groove. When adjacent two side forms are docked through the tongue-and-groove end and the protrusion end, a sealing strip is arranged at the docking part.

[0034] Preferably, the second reinforcing bar in the second support is bent into a V shape, and the two second reinforcing bars are symmetrically arranged in parallel along the length direction of the water stop beam, and the lower edge of the bending starting point is welded to the upper edge of the third reinforcing bar.

[0035] Preferably, the maintenance method for the water stop beam and the floor slab is covering and sprinkling water for maintenance. The specific maintenance method steps of S10 are as follows:

[0036] S10.1: Sprinkle water on the water stop beam and the floor slab concrete after removing the formwork.

[0037] S10.2: Cover the finished concrete with a plastic film.

[0038] S10.3: Press the plastic film with bricks and cure for 7 - 14 days.

[0039] The present invention has the following beneficial effects:

[0040] 1. Weld multiple second supports made of on-site waste reinforcing bars at the marked positions on the floor slab reinforcing bar framework, and control the upper edges of multiple third reinforcing bars at the same elevation plane through a level. In this way, the position and elevation of the water stop beam on the floor slab are determined. Making the second support with waste reinforcing bar heads also saves costs.

[0041] 2. The bent parts of the first reinforcing bar and the second reinforcing bar in multiple second supports can fix the left and right square timbers and side forms. Adjacent two side forms are docked through the tongue-and-groove and protrusion at their heads and tails, and a sealing strip is arranged at the connection part between adjacent two side forms. In this way, it can prevent the adjacent two side forms from being misaligned due to the lateral impact of concrete at the docking part during concrete pouring, and the sealing strip can also prevent slurry leakage.

[0042] 3. Fix the upper parts of the two side forms with tie bolts, which is faster and more stable compared to the method of fixing slats to the upper parts of the side forms with iron nails. Compared with the method of passing the screw into the hole, a screw groove is opened at the upper edge of the side form, which can prevent the screw from getting stuck during the insertion process. Moreover, when removing the screw, a small amount of concrete will adhere to the screw. If it is pulled out from the hole, it is easy to be stuck by the concrete and is rather laborious. However, with the screw groove in this application, when removing the tie bolt, even if there is a small amount of concrete on the screw, the screw can be taken out from the screw groove, facilitating the installation and removal of the tie bolt;

[0043] 4. The second steel bar in the second support is embedded in the concrete of the water-stop reverse beam, which is more conducive to the combination of the water-stop reverse beam and the floor slab. The bent part of the first steel bar in the second support is located above the upper edge of the third steel bar, and this bent part is exposed on the upper surface of the floor slab. The exposed bent part of the first steel bar can be embedded in the mortar layer through subsequent paving work without the need for cutting, saving time and effort. Compared with the original construction method, the same "I-shaped" first support is used along the length direction of the water-stop reverse beam. In order to prevent affecting the waterproof construction and tile paving of the kitchen and bathroom floors, it is necessary to cut off the vertical exposed parts of the first steel bar one by one. There are a large number of exposed first steel bars in the original first support, and the cutting workload is large when dealing with the final work.

[0044] 5. The second steel bar can also be set in a V shape, which can increase the bonding force between the second steel bar and the water-stop reverse beam, and also increase the supporting force of the second steel bar on the water-stop reverse beam, making the connection between the water-stop reverse beam and the floor slab more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of the connection between the water-stop reverse beam and the floor slab of a construction method of a building water-stop reverse beam according to the present invention;

[0046] Figure 2 For Figure 1 A enlarged view of;

[0047] Figure 3 For Figure 1 B enlarged view of;

[0048] Figure 4 Structural and layout diagram of the second support in the first embodiment of a construction method of a building water-stop reverse beam according to the present invention;

[0049] Figure 5 Structural diagram of the water-stop reverse beam after form removal in a construction method of a building water-stop reverse beam according to the present invention;

[0050] Figure 6 Structural and layout diagram of the second support in the second embodiment of a construction method of a building water-stop reverse beam according to the present invention;

[0051] Figure 7The front view of a construction method for a building water-stop inverted beam according to the present invention;

[0052] Figure 8 is Figure 7 the enlarged view C of

[0053] Figure 9 The front view of the water-stop inverted beam structure before improvement;

[0054] Figure 10 The structure and layout diagram of support one before improvement;

[0055] Figure 11 The structure diagram of the water-stop inverted beam after form removal before improvement.

[0056] In the figure, 1 is support one; 1a is support two; 11 is steel bar one; 12 is steel bar two; 13 is steel bar three; 2 is square wood; 3 is slat; 4 is side form; 41 is screw groove; 5 is water-stop inverted beam; 6 is floor slab; 61 is floor slab steel bar framework; 7 is tie bolt; 71 is fastener; 72 is screw rod; 8 is sealing strip. Specific embodiments

[0057] The following further elaborates on the present invention in conjunction with the accompanying drawings and embodiments, so that those skilled in the art can implement it with reference to the text of the specification.

[0058] The present invention proposes a construction method for a building water-stop inverted beam 5, and the specific construction method steps are as follows:

[0059] S1: After the floor slab steel bar framework 61 is welded, a plurality of support two 1a are fabricated. Bend two steel bars one 11 into a V shape and invert them. The lower edges of the bending starting points of the two steel bars one 11 are respectively welded to the upper edges of the two ends of the steel bar three 13. Arrange two steel bars two 12 parallel to each other and symmetrically weld them to the upper middle part of the steel bar three 13 to form support two 1a. The steel bar two 12 can also be bent into a V shape. The two steel bars two 12 are arranged parallel and symmetrically along the length direction of the water-stop inverted beam 5, and the lower edges of their bending starting points are welded to the upper edge of the steel bar three 13;

[0060] S2: Weld a plurality of support two 1a to the floor slab steel bar framework 61 along the length direction of the water-stop inverted beam 5, and the axes of the plurality of support two 1a coincide. The spacing distance of the support two 1a along the length direction of the water-stop inverted beam 5 is 1 m. The diameters of the steel bar one 11, the steel bar two 12, and the steel bar three 13 are all 8 mm. The distance between the outer sides of the two steel bars two 12 in the support two 1a is the same as the width of the water-stop inverted beam (5). The distance between the bent part of the steel bar one 11 on the steel bar three 13 and the steel bar two 12 along the width direction of the water-stop inverted beam 5 is the same as the sum of the thicknesses of the side form 4 and the square wood 2. The specific installation steps of the support two 1a are as follows:

[0061] S2.1: Make positioning marks for the water-stop inverted beam 5 on the floor slab steel bar framework 61 according to the design requirements;

[0062] S2.2: Use a level to control the upper edges of the steel bars 13 in the two supports II 1a at the head and tail ends of the water-stop inverted beam 5 on the same elevation plane respectively, and weld the two supports II 1a at the head and tail ends of the water-stop inverted beam 5 to the floor slab steel bar framework 61 through the lower part of the steel bar I 11 respectively;

[0063] S2.3: Pull a positioning line between the two supports II 1a and at the welding points of their two steel bars II 12 and steel bars 13, and use a level to control the two fixed ends of the two positioning lines on the same elevation plane;

[0064] S2.4: Weld multiple supports II 1a to the floor slab steel bar framework 61 every 1 m according to the position of the positioning line.

[0065] S3: Set up the side formwork 4, place the side formwork 4 on multiple supports II 1a, and the left and right side formworks 4 are respectively close to the left and right outer sides of the two steel bars II 12 on the supports II 1a. The side formwork 4 is made of bamboo plywood with a thickness of 20 mm. Screw slots 41 are correspondingly opened every 1 m along the length direction of the water-stop inverted beam 5 on the upper edges of the left and right side formworks 4. The two docking ends of the side formwork 4 are respectively set as a tongue-and-groove and a protrusion adapted to the size of the tongue-and-groove. When adjacent two side formworks 4 are docked through the tongue-and-groove end and the protrusion end, a sealing strip 8 is arranged at the docking part;

[0066] S4: Embed the two square timbers 2 between the left and right side formworks 4 and the bent parts of the steel bar I 11 respectively, so that the left and right square timbers 2 squeeze the left and right side formworks 4 tightly;

[0067] S5: Fix the upper parts of the left and right side formworks 4 with the tension bolts 7. The tension bolt 7 includes a fastener 71 and a screw rod 72. Two fasteners 71 are arranged and are respectively threadedly connected to both ends of the screw rod 72. The specific construction method steps for fixing the upper part of the side formwork 4 are as follows:

[0068] S5.1: Complete the opening of the screw slots 41 on the upper edge of the side formwork 4 before setting up the side formwork 4;

[0069] S5.2: Set up the side formwork 4 and align the bolt holes on the upper edges of the left and right side formworks 4;

[0070] S5.3: Place the screw rod 72 in the left and right screw slots 41;

[0071] S5.4: Tighten the fasteners 71 at both ends of the screw rod 72 towards the side formwork 4, and make the distance between the inner sides of the upper parts of the side formwork 4 the same as the width of the water-stop inverted beam 5;

[0072] S6: After the concrete of the floor slab 6 is vibrated and compacted and before the concrete of the floor slab 6 starts to set, pour the concrete of the water-stop inverted beam 5 between the side forms 4 on both sides.

[0073] S7: Use an inserted vibrator to vibrate and compact the concrete of the water-stop inverted beam 5.

[0074] S8: Level and smooth the upper surfaces of the concrete of the water-stop inverted beam 5 and the floor slab 6.

[0075] S9: After the concrete of the water-stop inverted beam 5 and the floor slab 6 reach the designed strength, remove the side forms 4 on the left and right sides of the water-stop inverted beam 5 and the formwork of the floor slab 6.

[0076] S10: Cure the concrete of the water-stop inverted beam 5 and the floor slab 6. The curing method for the water-stop inverted beam 5 and the floor slab 6 is covering and sprinkling water for curing. The specific steps of the curing method are as follows:

[0077] S10.1: Sprinkle water on the concrete of the water-stop inverted beam 5 and the floor slab 6 after form removal.

[0078] S10.2: Cover the finished concrete with a plastic film.

[0079] S10.3: Press the plastic film with bricks and cure for 7 - 14 days. Embodiment

[0080] The structure corresponding to the construction method of a building water-stop inverted beam 5 proposed by the present invention is as shown in Figure 1 and Figure 4 and includes a structure of support one 1, square timber 2, support two 1a, side form 4 and tie bolts 7. A plurality of support two 1a are provided. The plurality of support two 1a are coaxially arranged along the length direction of the water-stop inverted beam 5 and are welded on the upper surface of the floor slab steel bar framework 61. As shown in Figure 4 and includes steel bar one 11, steel bar two 12 and steel bar three 13. Two steel bar one 11 are bent into a V shape and inverted. The two steel bar one 11 are parallel to each other. The lower edges of the bending starting points of the two steel bar one 11 are respectively welded to the upper edges of the two ends of the steel bar three (13). The two steel bar two 12 are arranged parallel to each other and symmetrically welded to the upper middle part of the steel bar three 13. The support two 1a is welded to the floor slab steel bar framework 61 through the lower parts of the two steel bar one 11. The length of the steel bar two 12 is less than the height of the water-stop inverted beam 5. The distance between the outer sides of the left and right two steel bar two 12 is the same as the width of the water-stop inverted beam 5. The distance in the width direction of the water-stop inverted beam 5 between the bent part of the steel bar one 11 on the upper edge of the steel bar three 13 and the steel bar two 12 in the support two 1a is the same as the sum of the thicknesses of the side form 4 and the square timber 2. As shown in Figure 1 , Figure 7 and Figure 8As shown in the figure, the side formwork 4 is placed on multiple second supports 1a, and the side formworks 4 on the left and right sides are respectively pressed against the left and right outer sides of two second steel bars 12 on the second supports 1a. Two square timbers 2 are respectively embedded between the left and right side formworks 4 and the bent parts of the first steel bar 11, so that the square timbers 2 on the left and right sides squeeze the side formworks 4 on the left and right sides. The upper parts of the side formworks 4 on the left and right sides are fixed by tie bolts 7. The concrete of the floor slab 6 is poured on the floor slab steel bar framework 61 and wraps the floor slab steel bar framework 61. The water-stop inverted beam 5 is poured in the left and right side formworks 4 and fixedly connected to the upper surface of the floor slab 6. The elevation of the upper surface of the water-stop inverted beam 5 is lower than the elevation of the lower edge of the tie bolt 7.

[0081] The diameters of the first steel bar 11, the second steel bar 12 and the third steel bar 13 are all 8 mm.

[0082] The spacing distance of multiple second supports 1a along the length direction of the water-stop inverted beam 5 is 1 m.

[0083] The material of the side formwork 4 is a bamboo plywood with a thickness of 20 mm. This material has high hardness, high flexural and compressive strength, its surface is smooth and flat, it is easy to demold, the surface of the concrete is smooth, flat and delicate after demolding, and the formwork erection and processing are fast.

[0084] As Figure 1 and Figure 2 shown in the figure, screw slots 41 are correspondingly opened every 1 m along the length direction of the water-stop inverted beam 5 at the upper edges of the side formworks 4 on the left and right sides.

[0085] As Figure 2 shown in the figure, the tie bolt 7 includes a fastener 71 and a screw rod 72. The screw rod 72 is placed in the screw slot 41, and two fasteners 71 are provided and respectively thread-connected to both ends of the screw rod 72.

[0086] As Figure 3 shown in the figure, the two butt ends of the side formwork 4 are respectively provided with a rabbet and a protrusion adapted to the size of the rabbet. When adjacent two side formworks 4 are butted through the rabbet end and the protrusion end, a sealing strip 8 is arranged at the butt joint.

[0087] The curing method for the water-stop inverted beam 5 and the floor slab 6 is covering and sprinkling curing.

[0088] With the present invention, positioning marks for the water-stop counter beam 5 are made on the floor slab steel bar framework 61 after welding according to the design requirements. A plurality of second supports 1a made of waste steel bars on-site are welded at the marked positions on the floor slab steel bar framework 61, and the upper edges of the third steel bars 13 are controlled to be on the same elevation plane by a level, thus determining the position and elevation of the water-stop counter beam 5 on the floor slab 6. Using waste steel bar heads to make the second supports 1a also saves costs. The side formwork 4 is placed on the plurality of second supports 1a, and the left and right side formworks 4 are respectively pressed against the left and right outer sides of the two second steel bars 12 on the second supports 1a. Then, two square timbers 2 are respectively embedded between the left and right side formworks 4 and the bent parts of the first steel bars 11, so that the left and right square timbers 2 press tightly against the left and right side formworks 4. Adjacent side formworks 4 are butted through the tongue-and-groove and protrusions at their heads and tails, and a sealing strip 8 is arranged at the connection between adjacent side formworks 4. This can prevent the adjacent side formworks 4 from being displaced due to the lateral impact of concrete during concrete pouring, and the sealing strip 8 can also prevent leakage of mortar. The upper parts of the two side formworks 4 are fixed by tension bolts 7, which is faster and more stable compared to the method of fixing the slats 3 to the upper parts of the side formworks 4 with iron nails. Compared with the method of inserting the screw rod 72 into the hole, by providing a screw rod groove 41 on the upper edge of the side formwork 4, it can prevent the screw rod 72 from getting stuck during the insertion process. Moreover, when removing the screw rod 72, a small amount of concrete will adhere to the screw rod 72. If it is pulled out from the hole, it is easily stuck by the concrete and is rather laborious. However, with the screw rod groove 41 in the present application, when removing the tension bolt 7, even if there is a small amount of concrete on the screw rod 72, the screw rod 72 can be taken out from the screw rod groove 41, facilitating the installation and removal of the tension bolt 7. After the side formwork 4 is set up, the concrete of the floor slab 6 is poured. After the concrete of the floor slab 6 is poured and vibrated, the concrete of the water-stop counter beam 5 is poured before the concrete of the floor slab 6 starts to set. This can prevent cold joints from occurring between the water-stop counter beam 5 and the floor slab 6 and water seepage, and improve the integrity of the water-stop counter beam 5 and the floor slab 6. After the concrete of the water-stop counter beam 5 and the floor slab 6 reaches the design strength, the side formwork 4 and the formwork of the floor slab 6 are removed and water spraying maintenance is carried out. At this time, the second steel bars 12 in the second supports 1a are buried in the concrete of the water-stop counter beam 5, which is more conducive to the combination of the water-stop counter beam 5 and the floor slab 6. As shown in Figure 5 , Figure 10 and Figure 11 , in the second support, the bent part of the first steel bar is located on the upper edge of the third steel bar, and this bent part is exposed on the upper surface of the floor slab. The exposed bent part of the first steel bar can be buried in the mortar layer through subsequent paving work without the need for cutting, saving time and effort. Compared with the original construction method, the same "I-shaped" first support 1 is used along the length direction of the water-stop counter beam. In order to prevent affecting the waterproof construction of the kitchen and bathroom floors and the laying of ceramic tiles, it is necessary to cut off the vertical exposed parts of the first steel bars 11 one by one. The number of exposed first steel bars 11 in the original first support 1 is relatively large, and the cutting workload is large when dealing with the final work. Embodiment

[0089] This embodiment has the same structure as Embodiment 1, and the difference lies in that, as Figure 6 shown, the two steel bars II 12 in the support II 1a are bent into a V shape, and the two steel bars II 12 are symmetrically arranged in parallel along the length direction of the water stop inverted beam 5, and the lower edge of the bending starting point is welded to the upper edge of the steel bar III 13. In this way, after the concrete construction of the water stop inverted beam 5 is completed, the steel bar II 12 set in a V shape will increase the adhesion force with the water stop inverted beam 5, and also increase the supporting force of the steel bar II 12 on the water stop inverted beam 5, making the connection between the water stop inverted beam 5 and the floor slab 6 more stable.

[0090] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated and described examples here.

Claims

1. A construction method for a building water-stop inverted beam, characterized in that, the specific construction method steps are as follows: S1: After the floor steel bar framework (61) is welded, make multiple second supports (1a). Bend two first steel bars (11) into a V shape and invert them. Weld the lower edges of the bending starting points of the two first steel bars (11) to the upper edges of both ends of the third steel bar (13). Arrange two second steel bars (12) parallel to each other and symmetrically weld them to the upper middle part of the third steel bar (13) to form the second support (1a); S2: Weld multiple second supports (1a) to the floor steel bar framework (61) along the length direction of the water-stop inverted beam (5), and the axes of the multiple second supports (1a) coincide; S3: Set up the side formwork (4). Place the side formwork (4) on the multiple second supports (1a), and the left and right side formworks (4) are respectively close to the left and right outer sides of the two second steel bars (12) on the second support (1a); S4: Embed two square timbers (2) between the left and right side formworks (4) and the bent parts of the first steel bar (11) respectively, so that the left and right square timbers (2) squeeze the left and right side formworks (4); S5: Fix the upper parts of the left and right side formworks (4) with the tension bolts (7); S6: After the concrete of the floor slab (6) is poured and vibrated densely and before the concrete of the floor slab (6) begins to set, pour the concrete of the water-stop inverted beam (5) between the two side formworks (4); S7: Use an inserted vibrator to vibrate the concrete of the water-stop inverted beam (5) densely; S8: Smooth and level the upper surfaces of the concrete of the water-stop inverted beam (5) and the floor slab (6); S9: After the concrete of the water-stop inverted beam (5) and the floor slab (6) reach the design strength, remove the side formworks (4) on the left and right sides of the water-stop inverted beam (5) and the formwork of the floor slab (6); S10: Cure the concrete of the water-stop inverted beam (5) and the floor slab (6).

2. The construction method for a building water-stop inverted beam according to claim 1, characterized in that, the diameters of the first steel bar (11), the second steel bar (12) and the third steel bar (13) are all 8mm. The distance between the outer sides of the two second steel bars (12) in the second support (1a) is the same as the width of the water-stop inverted beam (5). The distance in the width direction of the water-stop inverted beam (5) between the bent part of the first steel bar (11) on the third steel bar (13) and the second steel bar (12) in the second support (1a) is the same as the sum of the thicknesses of the side formwork (4) and the square timber (2).

3. The construction method for a building water-stop inverted beam according to claim 1, characterized in that, the interval distance of the second support (1a) along the length direction of the water-stop inverted beam (5) is 1m. The specific installation steps of the second support (1a) in S2 are as follows: S2.1: According to the design requirements, make the positioning marks of the water-stop inverted beam (5) on the floor steel bar framework (61); S2.2: Use a level to control the upper edges of the third steel bars (13) in the two second supports (1a) at the head and tail ends of the water-stop inverted beam (5) on the same elevation plane respectively, and weld the two second supports (1a) at the head and tail ends of the water-stop inverted beam (5) to the floor steel bar framework (61) through the lower parts of the first steel bars (11) respectively; S2.3: Pull a positioning line between two second brackets (1a) and at the welding points of its two second steel bars (12) and third steel bars (13), and use a level to control the two fixed ends of the two positioning lines on the same elevation plane; S2.4: According to the position of the positioning line, weld multiple second brackets (1a) to the floor slab steel bar skeleton (61) every 1 m.

4. A construction method of a building water-stop inverted beam according to claim 1, characterized in that, the side formwork (4) is made of bamboo plywood with a thickness of 20 mm.

5. A construction method of a building water-stop inverted beam according to claim 1, characterized in that, screw slots (41) are correspondingly opened every 1 m along the length direction of the water-stop inverted beam (5) at the upper edges of the side formworks (4) on the left and right sides.

6. A construction method of a building water-stop inverted beam according to claim 5, characterized in that, the tie bolt (7) includes a fastener (71) and a screw rod (72), two fasteners (71) are provided and are respectively threadedly connected to both ends of the screw rod (72), and the specific construction method steps for fixing the upper part of the side formwork (4) in S5 are as follows: S5.1: Before setting up the side formwork (4), first complete the opening of the screw slots (41) at the upper edge of the side formwork (4); S5.2: Set up the side formwork (4) and align the screw slots (41) at the upper edges of the left and right side formworks (4); S5.3: Place the screw rod (72) in the left and right screw slots (41); S5.4: Tighten the fasteners (71) at both ends of the screw rod (72) towards the side formwork (4), and make the distance between the inner sides of the upper part of the side formwork (4) the same as the width of the water-stop inverted beam (5).

7. A construction method of a building water-stop inverted beam according to claim 5, characterized in that, the two docking ends of the side formwork (4) are respectively provided with a tongue-and-groove and a protrusion adapted to the size of the tongue-and-groove. When adjacent two side formworks (4) are docked through the tongue-and-groove end and the protrusion end, a sealing strip (8) is arranged at the docking place.

8. A construction method of a building water-stop inverted beam according to claim 1, characterized in that, the second steel bar (12) in the second bracket (1a) is bent into a V shape, and the two second steel bars (12) are symmetrically arranged in parallel along the length direction of the water-stop inverted beam (5), and the lower edge of the bending starting point is welded to the upper edge of the third steel bar (13).

9. A construction method of a building water-stop inverted beam according to claim 1, characterized in that, the curing method of the water-stop inverted beam (5) and the floor slab (6) is covering and sprinkling curing, and the specific curing method steps of S10 are as follows: S10.1: Sprinkle water on the concrete of the water-stop inverted beam (5) and the floor slab (6) after removing the formwork; S10.2: Cover the finished concrete with a plastic film; S10.3: Press the plastic film with bricks and cure for 7 - 14 d.

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