A prefabricated building waterproof wall structure and its construction method

Abstract

This invention relates to a prefabricated building waterproof wall structure and its construction method. The waterproof wall structure includes a floor slab connector installed at the top of the floor slab and a wall connector installed at the bottom of the prefabricated wall. The floor slab connector includes two rows of through-bars arranged along the length of the wall and a supporting ridge beam located between the two rows of bars. The wall connector includes two rows of bar casting holes arranged along the length of the wall and a positioning groove plate located between the two rows of bar casting holes. The supporting ridge beam can be inserted into each bar casting hole and then cast and fixed. The positioning groove plate abuts against the supporting ridge beam to achieve wall positioning. Compared with the traditional concrete grouting joint connection structure, this method can improve the toughness of the wall and the sealing joint, and avoid stress concentration that causes cracks and leakage.

Description

Technical Field

[0001] This invention relates to a prefabricated building waterproof wall structure and its construction method, belonging to the technical field of building construction. Background Technology

[0002] Prefabricated buildings refer to buildings where a large amount of on-site work in traditional construction methods is transferred to factories. Building components and accessories are processed and manufactured in factories, transported to the construction site, and assembled on-site using reliable connection methods. Prefabricated buildings mainly include precast concrete structures, steel structures, and modern wood structures. Because they adopt standardized design, factory production, assembly construction, information management, and intelligent applications, they represent modern industrialized production methods.

[0003] like Figure 5 The diagram illustrates a common waterproofing structure for precast walls in the prefabricated building industry. This installation method includes a pre-reserved reinforcing bar (b) fixed to floor slab a. A reinforcing bar groove (d) is provided on the precast wall c corresponding to the position of the pre-reserved reinforcing bar (b). After the precast wall c is assembled with floor slab a, the pre-reserved reinforcing bar (b) passes into the reinforcing bar groove (d) and is connected and fixed by pouring concrete grout. In this structure, the bottom surface of the precast wall c is connected to the top surface of floor slab a by filling with mortar. However, because the mortar is poured later, the connection between the wall and the floor slab cannot be well solidified and fused. Furthermore, the wall installation method itself lacks energy-absorbing toughness and stress-dissipating structure. When the wall is subjected to horizontal loads caused by strong winds or earthquakes, it easily becomes a stress concentration point on the wall surface, leading to stress concentration and cracks causing leakage in the later stages of use. (Summary of the Invention)

[0004] To address the aforementioned problems in existing technologies, this invention provides a prefabricated building waterproof wall structure and its construction method.

[0005] The technical solution of the present invention is as follows:

[0006] A prefabricated building waterproof wall structure includes a floor slab connector installed at the top of the floor slab and a wall connector installed at the bottom of the prefabricated wall. The floor slab connector includes two rows of through-bars arranged along the length of the wall and a supporting ridge beam located between the two rows of bars. The wall connector includes two rows of bar casting holes arranged along the length of the wall and a positioning groove plate located between the two rows of bar casting holes. The supporting ridge beam can be inserted into each bar casting hole and then cast and fixed. The positioning groove plate abuts against the supporting ridge beam to achieve wall positioning.

[0007] The floor slab connector includes a cast anchor plate, and the through-bar and supporting ridge beam are fixedly welded to the top surface of the cast anchor plate; a filling groove is chiseled at the top of the floor slab corresponding to the wall installation position, and the cast anchor plate is placed in the filling groove and filled with concrete.

[0008] The landfill trench has reserved reinforcement bars for the floor slab, and the bottom surface of the cast anchor plate is fixedly welded with connecting bars corresponding to the reserved reinforcement bars of the floor slab. The bottom end of the connecting bars is fixedly welded to the top end of the reserved reinforcement bars.

[0009] Two rows of J-shaped pre-embedded ribs are fixedly welded to the top two sides of the positioning groove plate.

[0010] A grouting hole is provided between the top ends of the two rows of steel bar casting holes, and the inner end of the grouting hole is connected to the inner side of the wall. A grouting connecting hole is provided between the lower ends of the two rows of steel bar casting holes, and the inner end of the grouting connecting hole is connected to the inner side of the wall.

[0011] The waterproof wall structure also includes two sets of waterproof sealing grooves. The waterproof sealing grooves are opened on the bottom surface of the precast wall and at the positions corresponding to the two rows of steel reinforcement pouring holes. A rubber sealing strip is installed in the waterproof sealing groove. The rubber sealing strip has a steel reinforcement through hole corresponding to the position of the steel reinforcement pouring hole.

[0012] The thickness of the rubber sealing strip is greater than the depth of the waterproof sealing groove by - mm.

[0013] The precast wall is filled with foamed filler between its bottom surface and the top surface of the floor slab, and sealant is applied at the inside corner between the precast wall and the floor slab.

[0014] A construction method for a prefabricated building waterproof wall structure includes the following construction steps:

[0015] Step 1: Precast the precast wall structure, embed wall connectors at the bottom of the precast wall, leave a waterproof sealing groove, and insert a rubber sealing strip into the waterproof sealing groove;

[0016] Step 2: Drill a backfill groove on the top surface of the floor slab at the corresponding installation location of the precast wall;

[0017] Step 3: Insert the floor slab connector into the floor slab, and weld the bottom connecting rib of the floor slab connector to the reserved rib.

[0018] Step 4: Pour concrete into the backfill trench to bury the anchor plate and expose the through-bar and supporting ridge beam. Level the top surface with the top surface of the floor slab.

[0019] Step 5: Hoist the precast wall above the floor slab, and slowly lower it after the through-bar rebars are aligned with the rebar casting holes until the supporting ridge beam abuts against the positioning groove plate to achieve proper installation and positioning;

[0020] Step 6: Connect at least two sets of adjusting cables between the inner side of the precast wall and the top surface of the floor slab, and use a plumb line to adjust the precast wall to be perpendicular to the floor slab plane;

[0021] Step 7: Pour concrete grout into the reinforcing bar pouring hole through the grouting hole until the grout flows out from the pouring connection hole;

[0022] Step 8: After the grout has solidified, fill the space between the bottom of the precast wall and the top of the floor slab with foaming filler and apply sealant at the inside corners of the wall and the floor slab.

[0023] Step 9: Remove the adjustment cables to complete the installation of the precast wall.

[0024] The adjusting cable includes a turnbuckle, which has bolt rods at both ends. The bolt rods are connected to hinge heads at their ends. The hinge heads are movably connected to hinge seats, which are provided with bolt holes and can be fixed to the wall or floor with expansion bolts.

[0025] The present invention has the following beneficial effects:

[0026] This invention discloses a prefabricated building waterproof wall structure, which adopts a movable support consisting of a supporting ridge beam and a positioning groove plate, combined with a soft seal consisting of a rubber sealing strip and a card-filling mechanism, to form a new type of wall installation structure. Compared with the traditional concrete grouting joint connection structure, it can improve the toughness of the wall and the sealing joint, and avoid stress concentration that causes cracks and leakage. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a prefabricated building waterproof wall structure and its construction method according to the present invention;

[0028] Figure 2 This is a structural schematic diagram of a prefabricated building waterproof wall structure and its construction method according to the present invention;

[0029] Figure 3 This is a structural schematic diagram of a prefabricated building waterproof wall structure and its construction method according to the present invention;

[0030] Figure 4 This is a structural schematic diagram of a prefabricated building waterproof wall structure and its construction method according to the present invention;

[0031] Figure 5 This is a structural schematic diagram of a prefabricated building waterproof wall structure and its construction method according to the present invention. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] See Figure 1-4A prefabricated building waterproof wall structure includes a floor slab connector 1 installed at the top of a floor slab 100 and a wall connector 2 installed at the bottom of a prefabricated wall 200. The floor slab connector 1 includes two rows of through steel bars 101 arranged along the length of the wall and a supporting ridge beam 102 located between the two rows of steel bars. The supporting ridge beam 102 structure includes a round rod beam at the top and a support seat at the bottom. The positioning groove plate 202 is a round-bottomed inverted V-shaped groove structure. The supporting ridge beam 102 cooperates with the positioning groove plate 202, which is actually a round... The top of the beam abuts against the bottom of the V-shaped groove. The floor slab connector 1 also includes a cast anchor plate 103, through steel bars 101 and supporting ridge beam 102 fixedly welded to the top surface of the cast anchor plate 103. A filling groove 4 is chiseled at the top of the floor slab corresponding to the wall installation position. The cast anchor plate 103 is placed in the filling groove 4 and filled by concrete pouring. The filling groove 4 has reserved reinforcement bars 3 of the floor slab. A connecting reinforcement bar 104 is fixedly welded to the bottom surface of the cast anchor plate 103 corresponding to the reserved reinforcement bar 3 of the floor slab. The bottom end of the connecting reinforcement bar 104 is fixedly welded to the top end of the reserved reinforcement bar 3.

[0035] Traditional precast wall installation relies on the connection between the pre-reserved reinforcing bars in the floor slab and the rebar holes in the wall for initial positioning. Due to the large gap between the pre-reserved reinforcing bars and the rebar holes, complex adjustments are required. The construction difficulty lies in the large size and weight of the precast walls, and the fact that direct positioning and adjustment are not easy during hoisting, making the construction process complex and difficult to control the accuracy of the installation position. In this embodiment, a movable support consisting of a supporting ridge beam 102 and a positioning groove plate 202 is used. During the precast wall installation stage, the connection between the supporting ridge beam 102 and the positioning groove plate 202 facilitates wall positioning. Only the accuracy of the supporting ridge beam 102 needs to be ensured during the pre-embedding of the floor slab connector 1. Subsequently, during the hoisting of the precast wall, there is no need to repeatedly adjust the wall position; the wall can simply be placed directly on the supporting ridge beam 102, and after full contact, the left and right positions can be determined.

[0036] The wall connector 2 includes two rows of steel reinforcement casting holes 201 arranged along the length of the wall, and a positioning groove plate 202 located between the two rows of steel reinforcement casting holes 201. A grouting hole 204 is provided between the top ends of the two rows of steel reinforcement casting holes 201, and the inner end of the grouting hole 204 is connected to the inner side of the wall. A casting connecting hole 205 is provided between the lower ends of the two rows of steel reinforcement casting holes 201, and the inner end of the casting connecting hole 205 is connected to the inner side of the wall. Two rows of J-shaped pre-embedded steel bars 203 are fixedly welded to the top two sides of the positioning groove plate 202. The supporting ridge beam 102 can be inserted into each steel reinforcement casting hole 201 and then cast and fixed. The positioning groove plate 202 and the supporting ridge beam 102 abut against each other to achieve wall positioning.

[0037] The waterproof wall structure also includes two sets of waterproof sealing grooves 5. The waterproof sealing grooves 5 are opened on the bottom surface of the precast wall and at the corresponding positions of the two rows of steel reinforcement pouring holes 201. A rubber sealing strip 6 is installed in the waterproof sealing groove 5. A steel reinforcement through hole 601 is opened at the position of the steel reinforcement pouring hole 201. The thickness of the rubber sealing strip 6 is 3-5mm greater than the depth of the waterproof sealing groove 5. After the wall is installed, the rubber sealing strip 6 is compressed longitudinally by gravity, thereby ensuring that its top and bottom are fully sealed, thus ensuring water tightness.

[0038] Foamed filler 8 is filled between the bottom surface of the precast wall and the top surface of the floor slab, and sealant 9 is applied at the inside corner of the precast wall and the floor slab. Both foamed filler 8 and sealant 9 have a certain degree of toughness and are not prone to cracking due to wall stress.

[0039] Traditional wall structures use mortar to fill the gaps between the wall and the floor slab, forming joints at corners. Since the mortar is poured later, the joint between the wall and the floor slab cannot properly solidify and fuse. Furthermore, the wall installation itself lacks energy-absorbing toughness and stress-dissipating structures, easily becoming stress concentration points on the wall surface. Later in use, stress concentration can easily lead to cracks and leaks. In this embodiment, after the supporting ridge beam 102 abuts against the positioning groove plate 202, a certain gap is left between the bottom surface of the wall and the surface of the floor slab. This gap is blocked by a rubber sealing strip and filled with a soft seal. When the wall is subjected to horizontal loads caused by strong winds or earthquakes, even if the wall tilts slightly, it will not affect the sealing structure's failure. After the wall recovers its stress, the flexibility of the sealing structure can still recover and effectively seal.

[0040] Example 2

[0041] According to the prefabricated building waterproof wall structure of Embodiment 1 above, a construction method for the prefabricated building waterproof wall structure is also provided, including the following construction steps:

[0042] Step 1: Precast the precast wall structure, embed the wall connector 2 at the bottom of the precast wall, leave a waterproof sealing groove 5 and insert a rubber sealing strip 6 into the waterproof sealing groove 5;

[0043] Step 2: Drill a backfill groove 4 on the top surface of the floor slab at the corresponding precast wall installation location;

[0044] Step 3: Insert the floor slab connector 1 into the floor slab 100, and fix and weld the bottom connecting bar 104 of the floor slab connector 1 to the reserved bar 3.

[0045] Step 4: Pour concrete into the filling trench 4 to bury the anchor plate 103 and expose the through steel bar 101 and the supporting ridge beam 102. Level the top surface of the concrete with the top surface of the floor slab.

[0046] Step 5: Hoist the precast wall above the floor slab, and slowly lower it after the through steel bar 101 corresponds to the steel bar casting hole 201 until the supporting ridge beam 102 abuts against the positioning groove plate 202 to achieve installation and positioning.

[0047] Step Six: Connect at least two sets of adjusting cables 7 between the inner side of the precast wall and the top surface of the floor slab, and use a plumb line to adjust the precast wall to be perpendicular to the floor slab plane; wherein, the adjusting cable 7 includes a turnbuckle 701, the turnbuckle 701 has bolt rods 702 at both ends, the bolt rods 702 are connected to the ends of the bolt rods 702, the hinge heads 703 are movably connected to the hinge seats 704, the hinge seats 704 are provided with bolt holes, which can be fixed to the wall or floor slab with expansion bolts. By turning the turnbuckle 701, the overall length of the adjusting cable 7 can be changed, thereby adjusting the inclination of the precast wall to make it perpendicular to the floor slab surface.

[0048] Step 7: Pour concrete grout into the reinforcing bar pouring hole 201 through the grouting hole 204 until the grout flows out from the pouring connection hole 205;

[0049] Step 8: After the grout has solidified, fill the space between the bottom of the precast wall and the top of the floor slab with foamed filler 8 and apply sealant 9 at the inside corner of the wall and the floor slab;

[0050] Step 9: Remove the adjusting cable 7 to complete the precast wall installation.

[0051] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A prefabricated building waterproof wall structure, characterized in that: The system includes a floor slab connector (1) installed at the top of the floor slab (100) and a wall connector (2) installed at the bottom of the precast wall (200). The floor slab connector (1) includes two rows of through-bars (101) arranged along the length of the wall and a supporting ridge beam (102) located between the two rows of bars. The wall connector (2) includes two rows of bar casting holes (201) arranged along the length of the wall and a positioning groove plate (202) located between the two rows of bar casting holes (201). The through-bars (101) It can be inserted into each steel bar casting hole (201) and then cast and fixed. The positioning groove plate (202) and the supporting ridge beam (102) abut against each other to achieve wall positioning. The anti-seepage wall structure also includes two sets of waterproof sealing grooves (5). The waterproof sealing grooves (5) are opened on the bottom surface of the precast wall and at the corresponding positions of the two rows of steel bar casting holes (201). A rubber sealing strip (6) is provided in the waterproof sealing groove (5). The rubber sealing strip (6) has a steel bar through hole (601) corresponding to the position of the steel bar casting hole (201).

2. The prefabricated building waterproof wall structure as described in claim 1, characterized in that: The floor slab connector (1) includes a cast anchor plate (103), the through steel bar (101) and the supporting ridge beam (102) are fixedly welded to the top surface of the cast anchor plate (103); a filling groove (4) is chiseled at the top of the floor slab corresponding to the wall installation position, the cast anchor plate (103) is placed in the filling groove (4) and filled by concrete pouring.

3. The prefabricated building waterproof wall structure as described in claim 2, characterized in that: The filling trench (4) has a reserved reinforcement (3) for the floor slab. The bottom surface of the cast anchor plate (103) is fixedly welded with a connecting reinforcement (104) corresponding to the reserved reinforcement (3) of the floor slab. The bottom end of the connecting reinforcement (104) is fixedly welded to the top end of the reserved reinforcement (3).

4. The prefabricated building waterproof wall structure as described in claim 1, characterized in that: Two rows of J-shaped pre-embedded ribs (203) are fixedly welded to the top two sides of the positioning groove plate (202).

5. The prefabricated building waterproof wall structure as described in claim 1, characterized in that: A grouting hole (204) is provided between the top ends of the two rows of steel bar casting holes (201), and the inner end of the grouting hole (204) is connected to the inner side of the wall. A grouting connecting hole (205) is provided between the lower ends of the two rows of steel bar casting holes (201), and the inner end of the grouting connecting hole (205) is connected to the inner side of the wall.

6. The prefabricated building waterproof wall structure as described in claim 1, characterized in that: The thickness of the rubber sealing strip (6) is 3-5 mm greater than the depth of the waterproof sealing groove (5).

7. The prefabricated building waterproof wall structure as described in claim 1, characterized in that: Foaming filler (8) is filled between the bottom surface of the precast wall and the top surface of the floor slab, and sealant (9) is applied at the inside corner of the precast wall and the floor slab.

8. A construction method for a prefabricated building waterproof wall structure, characterized in that, The construction steps include the following: Step 1: Prefabricate the prefabricated wall structure, embed wall connectors (2) at the bottom of the prefabricated wall, leave a waterproof sealing groove (5) and insert a rubber sealing strip (6) into the waterproof sealing groove (5); Step 2: Cut a backfill groove (4) at the corresponding precast wall installation position on the top surface of the floor slab; Step 3: Place the floor slab connector (1) into the floor slab (100), and fix and weld the bottom connecting bar (104) of the floor slab connector (1) to the reserved bar (3); Step 4: Pour concrete in the filling trench (4) to bury the anchor plate (103) and expose the through-welded steel bars (101) and the supporting ridge beam (102). Level the top surface with the top surface of the floor slab. Step 5: Hoist the precast wall above the floor slab, and slowly lower it so that the through-bar (101) corresponds to the bar casting hole (201) until the supporting ridge beam (102) abuts against the positioning groove plate (202) to achieve installation and positioning. Step 6: Connect at least two sets of adjusting cables (7) between the inner side of the precast wall and the top surface of the floor slab, and use a plumb line to adjust the precast wall to be perpendicular to the floor slab plane; Step 7: Pour concrete grout into the reinforcing bar pouring hole (201) through the grouting hole (204) until the grout flows out from the pouring connection hole (205); Step 8: After the grout has solidified, fill the space between the bottom of the precast wall and the top of the floor slab with foaming filler (8) and apply sealant at the inside corner of the wall and the floor slab (9). Step 9: Remove the adjusting cable (7) and complete the precast wall installation.

9. A construction method for a prefabricated building waterproof wall structure as described in claim 8, characterized in that: The adjusting cable (7) includes a turnbuckle (701), which has bolt rods (702) at both ends. The bolt rods (702) are connected to a hinge head (703) at the end. The hinge head (703) is movably connected to a hinge seat (704). The hinge seat (704) is provided with bolt holes and can be fixed to the wall or floor with expansion bolts.

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