A construction method for early closure of post-cast strips on exterior walls

Abstract

The present invention discloses a construction method for sealing the post-cast strip of an exterior wall in advance, comprising the following steps: S1, making a customized template: customizing the template according to the height of the post-cast strip; S2, making concrete blocks: casting fine stone concrete precast blocks; S3, hoisting and splicing the concrete blocks: by pre-reserving hoisting holes and using a tower crane to hoist the precast blocks to a designated location, and then splicing the upper and lower concave and convex joints, the problem of leakage in the joints of two concrete blocks is solved. The present invention forms concrete precast blocks by casting through template design, and seals the post-cast strip of the exterior wall in advance, which not only meets the quality of waterproof construction and the progress of backfill construction in advance, but also effectively reduces the cost of early closure. At the same time, hoisting holes are reserved on the precast blocks, and the tower crane is used for hoisting, which effectively solves the problem of heavy concrete blocks and difficult transportation. At the same time, the upper and lower concave and convex joints are used to solve the problem of leakage in the joints of the precast blocks. Installation and splicing are convenient and easy to construct.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method for early sealing of a post-cast strip of an exterior wall. Background Art

[0002] The settlement post-cast strip is set up to solve the settlement difference between the main building and the podium of a high-rise building. It can only be poured after the main structure is completed and the settlement is basically stable. It is a construction reserved strip set up for concrete pouring in the later stage of construction to reduce the impact of differential settlement between foundations on the foundation and superstructure.

[0003] During the project construction process, the settlement post-cast joints need to wait until the main structure is capped and the main building settlement is stable before they can be closed, which seriously affects the progress of the exterior wall waterproofing and fertilizer trough backfilling construction. In order to speed up the construction progress, the post-cast joints will be closed in advance. The first method uses bricklaying and plastering to close it in advance. The waterproof membrane is not firmly adhered to the post-cast joint position and is easy to fall off. In addition, after the backfill is completed, the lateral pressure of the soil can easily cause the brick wall to overturn inward, resulting in waterproofing failure. The second method uses steel plates to close the exterior wall post-cast joints. This method is too expensive and too uneconomical. Therefore, a construction method for early closing of the exterior wall post-cast joints is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a construction method for early sealing of the post-cast strip of the exterior wall.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A construction method for early sealing of an exterior wall post-cast strip comprises the following steps:

[0007] S1. Make customized templates: customize the templates according to the height of the post-casting strip;

[0008] S2. Making concrete blocks: pouring fine stone concrete prefabricated blocks;

[0009] S3. Concrete block hoisting and splicing: By reserving hoisting holes and using a tower crane to hoist the prefabricated blocks to the designated location, the upper and lower concave and convex joints are then spliced together, solving the problem of mortar leakage between the two concrete blocks;

[0010] S4. Connection and fixation: The prefabricated blocks and the water-stop steel plates are equipped with a connection mechanism to connect the connection columns on the prefabricated blocks with the water-stop steel plates at the post-cast strips on the exterior walls. This prevents the concrete blocks from being too high and causing instability, and also prevents the waterproof membrane from cracking after being pasted, thus ensuring the construction quality of the waterproof membrane.

[0011] S5. Carry out acceptance inspection: Check whether the prefabricated blocks are stably spliced, whether the connection between the connecting columns and the water-stop steel plates is firm, and whether the base requirements for the pasting of waterproof membranes are met.

[0012] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, the connecting mechanism in step 4 includes a prefabricated block and the exterior wall at the post-cast strip, the cross-section of the prefabricated block is an isosceles trapezoidal structure, and two symmetrically distributed sliding cavities are provided in the prefabricated block, each of the sliding cavities is slidably connected with a slide, and the side of the slide close to the exterior wall is fixedly connected with a connecting column, and the exterior walls on both sides of the post-cast strip are embedded with waterstop steel plates, and each of the waterstop steel plates is fixedly connected with a fixed block on the side away from the prefabricated block, and the fixed block and the waterstop steel plate are jointly provided with a connecting hole.

[0013] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, the fixed block is provided with a movable groove on the hole wall of the connecting hole, a clamping block is slidably connected in the movable groove, one end of the clamping block is fixedly connected to a pull rod in the movable groove, the end of the pull rod away from the clamping block extends to the outside of the fixed block and is fixedly connected to a pull ball, a first spring connected to the clamping block and the inner groove wall of the movable groove is sleeved on the pull rod, and a clamping hole is provided on the end of each connecting column away from the slide plate.

[0014] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, a protrusion is fixedly connected to the top of the prefabricated block, a groove is provided at the bottom of the prefabricated block, two symmetrically distributed lifting holes are provided on the protrusion, and a waterproof layer is provided on the outer surface of the prefabricated block and the exterior wall.

[0015] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, a cavity is opened at the center position of the prefabricated block, and the cavity walls on both sides of the cavity are connected to a main shaft for rotation together, and a rotating drum is coaxially fixedly connected to the main shaft, and two spiral guide grooves are opened on the cavity walls on both sides of the cavity and are connected to the two sliding cavities. A sliding rod is slidably connected in each of the sliding grooves, and one end of each sliding rod is fixedly connected to the adjacent slide, and the ends of the two sliding rods away from the slide are respectively connected to the two guide grooves.

[0016] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, the main shaft extends to the outside of the prefabricated block on the side close to the exterior wall, and the end of the main shaft located outside the prefabricated block is coaxially fixedly connected to a rectangular rod, a sliding sleeve is slidably connected to the rectangular rod, and a control wheel is coaxially fixedly connected to the sliding sleeve.

[0017] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, the prefabricated block is located on one side of the control wheel and is provided with a plurality of limit grooves in a circular array around the main axis, and an L-shaped limit rod is fixedly connected to the outer wall of the sliding sleeve.

[0018] In the above-mentioned construction method for early sealing of the post-cast strip of the exterior wall, symmetrically distributed fixing grooves are provided on the groove walls at both ends of the groove, a connecting block is slidably connected in the fixing groove, one end of the connecting block located in the fixing groove is fixedly connected to a second spring, and the end of the second spring away from the connecting block is fixedly connected to the inner groove wall of the fixing groove, and symmetrically distributed connecting grooves are provided at both ends of the protrusion, and the end of the connecting block away from the second spring is a lock tongue-shaped structure with the inclined surface facing downward.

[0019] The present invention has the following advantages:

[0020] The present invention forms prefabricated concrete blocks through template design and casting, and seals the exterior wall post-casting strips in advance, which not only meets the waterproof construction quality and the backfill construction schedule in advance, but also effectively reduces the cost of early sealing. At the same time, hoisting holes are reserved on the prefabricated blocks, and tower crane hoisting is used to effectively solve the problem of heavy concrete blocks and difficult transportation.

[0021] After the connection between the connecting column and the water-stop steel plate is fixedly connected, the control wheel is rotated in the opposite direction to make the slide slide back to pull back the connecting column. Since one end of the connecting column is fixed, when the connecting column is pulled back, the entire prefabricated block is moved closer to the outer wall, so that the prefabricated block and the outer wall are more closely attached, which is beneficial to the subsequent laying of the waterproof membrane and improves the waterproof effect.

[0022] The present invention arranges protrusions and grooves on the upper and lower parts of the prefabricated blocks respectively, and solves the problem of mortar leakage in the joints of the two prefabricated blocks by using the protrusions and grooves. At the same time, it makes the joint of the two prefabricated blocks more stable and firm, and the installation and splicing are convenient and easy to construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a construction method for early sealing of an exterior wall post-cast strip proposed by the present invention;

[0024] Figure 2 This is a structural schematic diagram of the prefabricated block portion in a construction method for early sealing of an exterior wall post-cast strip proposed by the present invention;

[0025] Figure 3 This is a bottom view of the prefabricated block portion in a construction method for early sealing of an exterior wall post-cast strip proposed by the present invention;

[0026] Figure 4 for Figure 1 A in the middle is an enlarged schematic diagram;

[0027] Figure 5 for Figure 1 Enlarged schematic diagram of point B in the middle.

[0028] In the figure: 1 outer wall, 2 prefabricated block, 3 waterstop steel plate, 4 protrusion, 5 groove, 6 lifting hole, 7 waterproof layer, 8 sliding cavity, 9 slide plate, 10 connecting column, 11 fixed block, 12 connecting hole, 13 moving groove, 14 clamping block, 15 pull rod, 16 first spring, 17 pull ball, 18 clamping hole, 19 cavity, 20 main shaft, 21 rotating drum, 22 sliding groove, 23 sliding rod, 24 guide groove, 25 rectangular rod, 26 sliding sleeve, 27 control wheel, 28 limiting groove, 29 limiting rod, 30 fixing groove, 31 connecting block, 32 second spring, 33 connecting groove. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention.

[0030] Reference Figure 1-5 A construction method for sealing an exterior wall post-cast strip in advance comprises the following steps:

[0031] S1. Make customized templates: customize the templates according to the height of the post-casting strip;

[0032] S2, making concrete blocks: pouring fine stone concrete prefabricated blocks 2;

[0033] S3, concrete block hoisting and splicing: by reserving the hoisting hole 6 and using the tower crane to hoist the prefabricated block 2 to the designated location, and then splicing the upper and lower concave and convex joints, the problem of mortar leakage between the two concrete blocks is solved;

[0034] S4. Connection and Fixing: The prefabricated block 2 and the water-stop steel plate 3 are provided with a connecting mechanism to connect the connecting column 10 on the prefabricated block 2 with the water-stop steel plate 3 at the post-casting strip on the outer wall 1. This prevents the concrete blocks from being too high and causing instability, and also prevents the waterproof membrane from cracking after being pasted, thereby ensuring the construction quality of the waterproof membrane.

[0035] S5. Carry out acceptance inspection: Check whether the prefabricated blocks 2 are stably spliced, whether the connection between the connecting column 10 and the water-stop steel plate 3 is firm, and whether the base requirements for the waterproof membrane are met.

[0036] In step 4, the connecting mechanism includes a prefabricated block 2 and an outer wall 1 at the post-cast joint. The cross-section of the prefabricated block 2 is an isosceles trapezoidal structure. Two symmetrically distributed sliding cavities 8 are provided in the prefabricated block 2. A slide plate 9 is slidably connected in each sliding cavity 8. The side of the slide plate 9 close to the outer wall 1 is fixedly connected to a connecting column 10. Waterstop steel plates 3 are embedded in the outer walls 1 on both sides of the post-cast joint. Each waterstop steel plate 3 is fixedly connected to a fixed block 11 on the side away from the prefabricated block 2. The fixed block 11 and the waterstop steel plate 3 are jointly provided with a connecting hole 12.

[0037] The fixed block 11 is located on the wall of the connecting hole 12 and is provided with a movable groove 13. A clamping block 14 is slidably connected in the movable groove 13. The clamping block 14 is located in the movable groove 13 and is fixedly connected to a pull rod 15 at one end. The end of the pull rod 15 away from the clamping block 14 extends to the outside of the fixed block 11 and is fixedly connected to a pull ball 17. A first spring 16 connected to the clamping block 14 and the inner groove wall of the movable groove 13 is sleeved on the pull rod 15. A clamping hole 18 is provided at the end of each connecting column 10 away from the slide 9.

[0038] A cavity 19 is provided at the center of the prefabricated block 2, and the two side walls of the cavity 19 are connected to a main shaft 20 for rotation. The main shaft 20 is coaxially fixedly connected to a rotating drum 21, and two spiral guide grooves 24 are provided on the rotating drum 21. The two side walls of the cavity 19 are respectively provided with sliding grooves 22 and connected to the two sliding cavities 8. A sliding rod 23 is slidingly connected in each sliding groove 22, and one end of each sliding rod 23 is fixedly connected to the adjacent slide 9. The ends of the two sliding rods 23 away from the slide 9 are respectively connected to the two guide grooves 24, and the two guide grooves 24 on the rotating drum 21 are symmetrically distributed around the center.

[0039] The side of the main shaft 20 close to the outer wall 1 extends to the outside of the prefabricated block 2. The end of the main shaft 20 located outside the prefabricated block 2 is coaxially fixedly connected to a rectangular rod 25, and a sliding sleeve 26 is slidably connected to the rectangular rod 25. The sliding sleeve 26 is coaxially fixedly connected to a control wheel 27. The prefabricated block 2 is located on one side of the control wheel 27 and is provided with a plurality of limit grooves 28 in a circular array around the main shaft 20. An L-shaped limit rod 29 is fixedly connected to the outer wall of the sliding sleeve 26.

[0040] A protrusion 4 is fixedly connected to the top of the prefabricated block 2, a groove 5 is provided at the bottom of the prefabricated block 2, and two symmetrically distributed lifting holes 6 are provided on the protrusion 4. A waterproof layer 7 is provided on the outer surface of the prefabricated block 2 and the outer wall 1. The groove walls at both ends of the groove 5 are provided with symmetrically distributed fixing grooves 30, and a connecting block 31 is slidably connected in the fixing groove 30. One end of the connecting block 31 is located in the fixing groove 30 and is fixedly connected to a second spring 32. The end of the second spring 32 away from the connecting block 31 is fixedly connected to the inner groove wall of the fixing groove 30. Symmetrically distributed connecting grooves 33 are provided at both ends of the protrusion 4, and the end of the connecting block 31 away from the second spring 32 is a lock tongue structure with the inclined surface facing downward. When the two concrete prefabricated blocks 2 are spliced with the upper and lower concave and convex joints, the inclined surface of the connecting block 31 is squeezed by the protrusion 4 below to achieve automatic card connection.

[0041] When the present invention is used for construction, the tower crane rope is fixedly connected to the two lifting holes 6 at the protrusion 4 on the prefabricated block 2, and the prefabricated block 2 is lifted to the outer wall 1 at the installation location. Then, the connecting column 10 is aligned with the connecting holes 12 at the two water-stop steel plates 3 on the post-casting strip. Then, the sliding sleeve 26 is pulled outward to make the limit rod 29 leave the limit groove 28 of the prefabricated block 2. Then, the control wheel 27 is rotated to drive the sliding sleeve 26 to rotate. The rectangular rod 25 is twisted by the sliding sleeve 26 so that the main shaft 20 and the rotating drum 21 rotate together with the sliding sleeve 26. The spiral guide groove 24 is used to pull the sliding rod 23 in the sliding groove 22 to slide, so that the sliding plate 9 in the sliding cavity 8. The connecting column 10 moves outward and is inserted into the connecting hole 12 of the water-stop steel plate 3. Then, the pull balls 17 at the two fixed blocks 11 are pulled. By pulling the pull rod 15, the block 14 leaves the connecting hole 12. After that, Continue to rotate the control wheel 27 to push the connecting column 10 further into the connecting hole 12. After the locking hole 18 on the connecting column 10 moves to the corresponding position of the movable groove 13, release the pull ball 17. Under the elastic force of the first spring 16, the locking block 14 slides back into the locking hole 18 of the connecting column 10, so that the fixed block 11 is fixedly connected to the connecting column 10. Then, rotate the control wheel 27 in the opposite direction to make the slide plate 9 slide back and pull back the connecting column 10. Since one end of the connecting column 10 is fixed, when the connecting column 10 is pulled back, the entire prefabricated block 2 will be moved closer to the outer wall 1, so that the prefabricated block 2 and the outer wall 1 are more closely attached, which is beneficial to the later laying of the waterproof membrane and also improves the waterproof effect. After the control wheel 27 is rotated into place, push the sliding sleeve 26 forward to allow the limit rod 29 to be inserted into the corresponding limit groove 28 to complete the locking.

[0042] When the next prefabricated block 2 is hoisted and spliced, it is only necessary to align the groove 5 on the hoisted prefabricated block 2 with the rear lower part of the protrusion 4 on the fixed prefabricated block 2 to complete the quick splicing. During the lowering process of the prefabricated block 2, the protrusion 4 at the bottom will squeeze the inclined surfaces of the connecting blocks 31 on both sides of the groove 5, so that the connecting blocks 31 all slide into the fixing groove 30. After the protrusion 4 has completely entered the groove 5, the connecting block 31 slides into the connecting groove 33 of the protrusion 4 under the elastic force of the second spring 32, making the splicing of the two prefabricated blocks 2 more stable.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A construction method for early sealing of post-cast strips of exterior walls, characterized in that: The following steps are involved: S1. Make customized templates: customize the templates according to the height of the post-casting strip; S2, making concrete blocks: pouring fine stone concrete prefabricated blocks (2); S3, hoisting and splicing of concrete blocks: by reserving hoisting holes (6) and using a tower crane to hoist the prefabricated block (2) to the designated location, and then splicing the upper and lower concave and convex joints, the problem of mortar leakage between the two concrete blocks is solved; S4. Connection and fixation: The prefabricated block (2) and the water-stop steel plate (3) are provided with a connection mechanism to connect the connection column (10) on the prefabricated block (2) with the water-stop steel plate (3) at the post-casting strip on the outer wall (1), thereby preventing the concrete blocks from being too high and causing instability, and also preventing the waterproof membrane from being cracked after being pasted, thereby ensuring the construction quality of the waterproof membrane; S5. Check and accept: Check whether the prefabricated blocks (2) are stably connected, whether the connection columns (10) and the water-stop steel plates (3) are firmly connected, and whether the base requirements for the waterproof membrane are met; In step 4, the connection mechanism includes a prefabricated block (2) and an outer wall (1) at the post-cast strip, the cross section of the prefabricated block (2) is an isosceles trapezoidal structure, two symmetrically distributed sliding cavities (8) are provided in the prefabricated block (2), a slide plate (9) is slidably connected in each of the slide cavities (8), a connecting column (10) is fixedly connected to the side of the slide plate (9) close to the outer wall (1), water-stop steel plates (3) are embedded in the outer wall (1) on both sides of the post-cast strip, and a fixed block (11) is fixedly connected to the side of each water-stop steel plate (3) away from the prefabricated block (2), and a connecting hole (12) is provided in common with the fixed block (11) and the water-stop steel plate (3); A cavity (19) is provided at the center of the prefabricated block (2), and the two side walls of the cavity (19) are connected to a main shaft (20) for rotation, and the main shaft (20) is coaxially fixedly connected to a rotating drum (21), and two spiral guide grooves (24) are provided on the two side walls of the cavity (19), respectively. The two side walls are provided with sliding grooves (22) and are connected to the two sliding cavities (8), and a sliding rod (23) is slidably connected in each of the sliding grooves (22), and one end of each sliding rod (23) is fixedly connected to the adjacent slide (9), and the ends of the two sliding rods (23) away from the slide (9) are respectively connected to the two guide grooves (24); The main shaft (20) extends from one side close to the outer wall (1) to the outside of the prefabricated block (2); one end of the main shaft (20) located outside the prefabricated block (2) is coaxially fixedly connected to a rectangular rod (25); a sliding sleeve (26) is slidably connected to the rectangular rod (25); and a control wheel (27) is coaxially fixedly connected to the sliding sleeve (26); The prefabricated block (2) is provided with a plurality of limiting grooves (28) in a circular array around the main shaft (20) on one side of the control wheel (27), and an L-shaped limiting rod (29) is fixedly connected to the outer wall of the sliding sleeve (26).

2. A construction method for early sealing of an exterior wall post-casting strip according to claim 1, characterized in that: The fixed block (11) is provided with a movable groove (13) on the wall of the connecting hole (12), a clamping block (14) is slidably connected in the movable groove (13), one end of the clamping block (14) is fixedly connected to a pull rod (15) in the movable groove (13), the end of the pull rod (15) away from the clamping block (14) extends to the outside of the fixed block (11) and is fixedly connected to a pull ball (17), a first spring (16) is sleeved on the pull rod (15) and is connected to the clamping block (14) and the inner groove wall of the movable groove (13), and a clamping hole (18) is provided on the end of each connecting column (10) away from the slide plate (9).

3. The construction method for early sealing of the post-cast strip of the exterior wall according to claim 1, characterized in that: A protrusion (4) is fixedly connected to the top of the prefabricated block (2), a groove (5) is provided at the bottom of the prefabricated block (2), two symmetrically distributed hanging holes (6) are provided on the protrusion (4), and a waterproof layer (7) is provided on the outer surface of the prefabricated block (2) and the outer wall (1).

4. A construction method for early sealing of post-cast strips of exterior walls according to claim 3, characterized in that: The groove (5) has symmetrically distributed fixing grooves (30) on its two end walls, and a connecting block (31) is slidably connected in the fixing groove (30). One end of the connecting block (31) located in the fixing groove (30) is fixedly connected to a second spring (32), and one end of the second spring (32) away from the connecting block (31) is fixedly connected to the inner groove wall of the fixing groove (30). The protrusion (4) has symmetrically distributed connecting grooves (33) on its two ends, and one end of the connecting block (31) away from the second spring (32) is a lock tongue-shaped structure with an inclined surface facing downward.

Images