Basement roof post-cast strip structure

Abstract

The utility model provides a basement roof post-cast strip structure which comprises a prefabricated cover plate and cast-in-place structural plates located on the two sides of the prefabricated cover plate and used for supporting the prefabricated cover plate, a cast-in-place structural layer is further arranged between the two cast-in-place structural plates, and the cast-in-place structural layer is located below the prefabricated cover plate. The prefabricated cover plate is provided with a sleeve used for pouring concrete to the cast-in-place structure layer, and the top of the sleeve is exposed out of the prefabricated cover plate. Compared with an existing post-cast strip which is completely cast in place, the post-cast strip has the advantages that the construction speed of the post-cast strip is increased, and the difficulty of cleaning work is greatly reduced due to the fact that the cast-in-place area is reduced; besides, multiple waterproof measures such as waterproof mortar, a blind seepage pipe, a coiled material waterproof layer, a water stop steel plate and a waterproof sleeve are adopted, the construction quality of the post-cast strip is guaranteed, the sealing effect of the post-cast strip is good, and the leakage problem is not prone to occurring.

Description

Technical Field

[0001] This utility model relates to the field of construction, and in particular to a post-cast strip structure for basement roof slabs. Background Technology

[0002] After the main structure of the building is completed, a post-pouring strip is poured. The post-pouring strip can prevent harmful cracks from forming in the cast-in-place reinforced concrete structure due to uneven shrinkage or settlement. Currently, the construction of post-pouring strips has problems such as slow construction speed and difficulty in cleaning, which affects the overall progress of the project. In addition, some cast-in-place post-pouring strips are prone to leakage problems due to poor sealing quality.

[0003] Therefore, it is necessary to design a new post-cast strip structure for basement roof slabs to overcome the above problems. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a post-pouring strip structure for basement roof slabs. This utility model solves at least some of the problems in the prior art.

[0005] This utility model is implemented as follows:

[0006] This utility model provides a post-cast strip structure for a basement roof slab, including a precast cover plate, cast-in-place structural slabs located on both sides of the precast cover plate and used to support the precast cover plate, and a cast-in-place structural layer between the two cast-in-place structural slabs. The cast-in-place structural layer is located below the precast cover plate. The precast cover plate is provided with a sleeve for pouring concrete into the cast-in-place structural layer, and the top of the sleeve is exposed outside the precast cover plate.

[0007] Furthermore, the cast-in-place structural slab is provided with an L-shaped groove on the side facing the precast cover plate. The L-shaped groove includes a horizontal surface for supporting the precast cover plate and a vertical surface connected to the side wall of the precast cover plate. Waterproof mortar is provided between the horizontal surface and the lower surface of the precast cover plate, and between the vertical surface and the side wall of the precast cover plate.

[0008] Furthermore, the upper surfaces of both the precast cover plate and the cast-in-place structural slab are covered with a waterproof membrane.

[0009] Furthermore, the post-cast strip structure of the basement roof slab also includes blind seepage pipes, and the precast cover plate is provided with an arc-shaped groove for laying the blind seepage pipes.

[0010] Furthermore, the cast-in-place structural slab has a water-stop steel plate extending into the cast-in-place structural layer.

[0011] Furthermore, the prefabricated cover plate has an upward protrusion in the middle, and the sleeve is disposed at the protrusion.

[0012] Furthermore, the sleeve is a waterproof sleeve, and a water-stop ring is provided on the outer wall of the waterproof sleeve, the water-stop ring being located inside the prefabricated cover plate.

[0013] Furthermore, the precast cover plate is a reinforced concrete precast cover plate.

[0014] Furthermore, the cast-in-place structural layer is a reinforced concrete layer.

[0015] Furthermore, the cast-in-place structural layer is in close contact with the lower surface of the precast cover plate.

[0016] This utility model has the following beneficial effects:

[0017] This utility model provides a post-cast strip structure for basement roof slabs, employing a precast reinforced concrete cover slab plus a cast-in-place structural layer. Compared to existing fully cast-in-place post-cast strips, this utility model accelerates the construction speed of the post-cast strip because the cast-in-place area is reduced, significantly lowering the difficulty of cleaning. In addition, this utility model employs multiple waterproofing measures, including waterproof mortar, blind seepage pipes, rolled waterproofing layers, water-stop steel plates, and waterproof sleeves, ensuring the construction quality of the post-cast strip. The post-cast strip has a good sealing effect and is less prone to leakage problems. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A cross-sectional view of the post-cast strip structure of the basement roof slab provided for an embodiment of this utility model (before the concrete is poured into the cast-in-place structural layer 5);

[0020] Figure 2 A cross-sectional view of the post-cast strip structure of the basement roof slab provided for an embodiment of this utility model (after the concrete of the cast-in-place structural layer 5 is poured);

[0021] Figure 3 A schematic diagram of a precast reinforced concrete cover plate provided in an embodiment of this utility model.

[0022] In the diagram: 1. Waterproof sleeve; 2. Waterproof membrane layer; 3. Blind seepage pipe; 4. Precast reinforced concrete cover plate; 5. Cast-in-place structural layer; 6. Water-stop steel plate; 7. Cast-in-place structural slab; 8. Waterproof mortar. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a number" means two or more.

[0025] like Figures 1-3 This utility model embodiment provides a post-cast strip structure for a basement roof slab, including a precast cover plate, cast-in-place structural slabs 7 located on both sides of the precast cover plate and used to support the precast cover plate, and a cast-in-place structural layer 5 between the two cast-in-place structural slabs 7. The cast-in-place structural layer 5 is located below the precast cover plate, and the precast cover plate is provided with a sleeve for pouring concrete into the cast-in-place structural layer 5. The concrete is poured up to the opening of the sleeve, and the top of the sleeve is exposed outside the precast cover plate. In this embodiment, the precast cover plate is a reinforced concrete precast cover plate 4. In this embodiment, the cast-in-place structural layer 5 is a reinforced concrete structure. The cast-in-place structural layer 5 is in close contact with the lower surface of the precast cover plate.

[0026] The cast-in-place structural slab 7 is the main building structure that is cast first, and it is located on both sides of the post-cast strip.

[0027] Reinforcing bars and waterstop steel plates 6 are reserved in the cast-in-place structural layer 5 below the precast reinforced concrete cover plate 4. Concrete is poured into the cast-in-place structural layer 5 later through the sleeve on the precast reinforced concrete cover plate 4.

[0028] In this embodiment, the cast-in-place structural slab 7 has an L-shaped groove on the side facing the precast reinforced concrete cover slab 4. The L-shaped groove includes a horizontal surface for supporting the precast reinforced concrete cover slab 4 and a vertical surface connected to the side wall of the precast reinforced concrete cover slab 4. Waterproof mortar 8 is provided between the horizontal surface and the lower surface of the precast reinforced concrete cover slab 4, and between the vertical surface and the side wall of the precast reinforced concrete cover slab 4. The waterproof mortar 8 has the effects of grouting and waterproofing. The L-shaped groove is reserved during the construction of the cast-in-place structural slab 7. The L-shaped groove can be used to support the precast reinforced concrete cover slab 4 and also serves as a water-blocking surface.

[0029] In this embodiment, the upper surfaces of both the precast reinforced concrete cover plate 4 and the cast-in-place structural slab 7 are covered with a waterproof membrane 2, which serves to waterproof the surface.

[0030] In this embodiment, the post-cast strip structure of the basement roof slab also includes a blind drainage pipe 3. The precast reinforced concrete cover plate 4 is provided with an arc-shaped groove for laying the blind drainage pipe 3. A waterproof membrane layer 2 is also laid in the arc-shaped groove. The extension direction of the blind drainage pipe 3 is the same as the extension direction of the post-cast strip.

[0031] In this embodiment, the cast-in-place structural slab 7 has a water-stop steel plate 6 extending into the cast-in-place structural layer 5.

[0032] In this embodiment, the precast cover plate has an upward-facing protrusion in the middle, the cross-section of which is trapezoidal. The sleeve is located at the protrusion. The protrusion serves to block water, and its two sides have downward slopes, thus also providing drainage. In this embodiment, the sleeve is a waterproof sleeve 1, and a water-stop ring is provided on its outer wall, located inside the precast cover plate. The outer wall of the waterproof sleeve has a galvanized layer for rust prevention. The protrusion prevents rainwater from accumulating around the galvanized waterproof sleeve 1 with the water-stop ring, reducing erosion and the risk of leakage. The waterproof sleeve 1 with the water-stop ring is used to prevent water seepage at the junction of the sleeve and the precast cover plate.

[0033] In this embodiment, there are several precast cover plates, and each precast cover plate is spliced ​​together sequentially along the extension direction of the post-cast strip.

[0034] This utility model provides a post-cast strip structure for basement roof slabs, employing a precast reinforced concrete cover slab 4 plus a cast-in-place structural layer 5. Compared to existing fully cast-in-place post-cast strips, this utility model accelerates the construction speed of the post-cast strip because the cast-in-place area is reduced, and the difficulty of cleaning work is also greatly reduced. In addition, this utility model adopts multiple waterproof measures such as waterproof mortar 8, blind seepage pipe 3, waterproof membrane layer 2, water-stop steel plate 6, and waterproof sleeve 1, ensuring the construction quality of the post-cast strip, resulting in a good sealing effect and reducing the likelihood of leakage problems.

[0035] The post-cast strip structure for the basement roof slab provided by this utility model adopts a combination of permanent and temporary methods to seal the post-cast strip in advance, which speeds up the overall progress of the project, effectively improves the image of civilized construction on site, and facilitates the next process. In this utility model, the water-blocking function of the "L"-shaped water-blocking surface at the junction of the precast reinforced concrete cover plate 4 and the cast-in-place structural slab 7 and the drainage function of the blind seepage pipe 3 together improve the sealing quality of the post-cast strip and reduce the risk of leakage caused by the sealing quality of the post-cast strip.

[0036] The waterproof sleeve 1 and the precast reinforced concrete cover 4 are integrated during the prefabrication process. The precast reinforced concrete cover 4 has arc-shaped grooves on both sides that match the specifications of the blind seepage pipe 3. After the waterproof membrane layer 2 is laid, the blind seepage pipe 3 is placed in the arc-shaped groove.

[0037] Before temporarily sealing the post-pouring strip with a precast reinforced concrete cover plate 4, the reinforcement binding of the cast-in-place structural layer 5 is completed first. According to the specific construction conditions on site, after the conditions for temporary sealing of the post-pouring strip are met, waterproof mortar 8 is first used to fill the horizontal interface between the cast-in-place structural slab 7 and the precast reinforced concrete cover plate 4. Then, the precast reinforced concrete cover plate 4 is placed on the cast-in-place structural slab 7. After the conditions for complete sealing of the post-pouring strip are met on site, the vertical gap between the cast-in-place structural slab 7 and the precast reinforced concrete cover plate 4 is filled tightly with waterproof mortar 8.

[0038] Once the conditions for pouring the lower cast-in-place structural layer 5 are met, concrete pouring is carried out through the galvanized waterproof sleeve 1 with a water-stop ring set in the middle of the precast reinforced concrete cover plate 4. The galvanized waterproof sleeve 1 with a water-stop ring also functions as a concrete grouting hole, a concrete vibration hole, and a venting hole. The concrete is poured up to the opening of the galvanized waterproof sleeve 1 with a water-stop ring.

[0039] The specific construction method for the post-cast strip structure of the basement roof slab includes the following steps:

[0040] 1. Design and fabrication of precast reinforced concrete cover plate 4: The specifications, dimensions, concrete strength grade, and steel bar specifications of the precast reinforced concrete cover plate 4 shall be adjusted according to actual needs. The length of the precast reinforced concrete cover plate 4 is preferably 1.2m to 1.5m. It should not be too short or too long. If it is too short, it will increase the number of galvanized waterproof sleeves 1 used, increase the cost, and also increase the number of concrete joints, increasing the risk of leakage. If it is too long, it will result in the overall weight of the precast reinforced concrete cover plate 4 being too large, which is not conducive to transportation and installation. The inner diameter of the waterproof sleeve 1 is required to be larger than the diameter of the concrete vibrator.

[0041] 2. Chipping and cleaning of post-pouring strip: After the cast-in-place structural slabs 7 on both sides of the post-pouring strip are poured, the concrete on the side of the cast-in-place structural slab 7 facing the post-pouring strip is roughened. The length of the waterstop steel plate 6 extending into the cast-in-place structural layer 5 should be appropriate. After chiseling, it is washed with a high-pressure water gun.

[0042] 3. Formwork and support erection for post-pouring strip: After the concrete at the post-pouring strip is roughened and cleaned, the formwork installation and bottom frame erection of the cast-in-place structural layer 5 are carried out. The formwork must be tightly attached to the bottom of the reinforced concrete precast slab 4 to avoid grout leakage at the bottom.

[0043] 4. Installation of precast reinforced concrete cover plate 4: Before installing the precast reinforced concrete cover plate 4, apply waterproof mortar 8 to the horizontal surface of the L-shaped groove of the cast-in-place structural slab 7 to waterproof the joint and serve as a grouting agent. Hoist the precast reinforced concrete cover plate 4 into the L-shaped groove and level and align it. After the basement roof slab on both sides of the post-pouring strip has shrunk or settled and the post-pouring strip has met the conditions for secondary pouring, use waterproof mortar 8 to fill the vertical joint between the precast reinforced concrete cover plate 4 and the cast-in-place structural slabs 7 on both sides.

[0044] 5. Casting of the cast-in-place structural layer 5: After the conditions for casting the lower cast-in-place structural layer 5 are met, concrete is poured through the galvanized waterproof sleeve 1 in the middle of the precast reinforced concrete cover plate 4. At the same time, the galvanized waterproof sleeve 1 is used as a vibration hole. The concrete is compacted by using an immersion vibrator until the concrete is poured up to the opening of the galvanized waterproof sleeve 1.

[0045] 6. Construction of the roll waterproofing layer 2: First, construct the roll waterproofing layer 2 on the top of the vertical joint between the precast reinforced concrete cover slab 4 and the cast-in-place structural slab 7, and then construct the overall roll waterproofing layer 2 according to the waterproofing method in the construction drawings.

[0046] 7. Installation of blind seepage pipe 3: After the waterproof membrane layer 2 is completed, before pouring the waterproof protective layer concrete on the basement roof slab, the blind seepage pipe 3 wrapped with permeable geotextile is placed in the arc groove of the precast reinforced concrete cover slab 4; when pouring the waterproof protective layer concrete, the waterproof protective layer concrete only covers the precast reinforced concrete cover slab 4 and the cast-in-place structural slab 7, and does not cover the blind seepage pipe 3. The blind seepage pipe 3 is generally protected by laying gravel. The gaps in the gravel can ensure that water can flow smoothly through the blind seepage pipe to the drainage ditch; the waterproof sleeve 1 is finally buried under the waterproof protective layer concrete.

[0047] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A post-cast strip structure for basement roof slabs, characterized in that: The device includes a precast cover plate, cast-in-place structural slabs located on both sides of the precast cover plate and used to support the precast cover plate, and a cast-in-place structural layer between the two cast-in-place structural slabs. The cast-in-place structural layer is located below the precast cover plate. The precast cover plate is provided with a sleeve for pouring concrete into the cast-in-place structural layer, and the top of the sleeve is exposed outside the precast cover plate.

2. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The cast-in-place structural slab has an L-shaped groove on the side facing the precast cover plate. The L-shaped groove includes a horizontal surface for supporting the precast cover plate and a vertical surface connected to the side wall of the precast cover plate. Waterproof mortar is provided between the horizontal surface and the lower surface of the precast cover plate, and between the vertical surface and the side wall of the precast cover plate.

3. The post-cast strip structure for the basement roof slab as described in claim 2, characterized in that: The upper surfaces of both the precast cover plate and the cast-in-place structural slab are covered with a waterproof membrane.

4. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: It also includes blind infiltration pipes, and the prefabricated cover plate is provided with an arc-shaped groove for laying the blind infiltration pipes.

5. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The cast-in-place structural slab has a water-stop steel plate extending into the cast-in-place structural layer.

6. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The prefabricated cover plate has an upward protrusion in the middle, and the sleeve is provided at the protrusion.

7. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The sleeve is a waterproof sleeve, and a water-stop ring is provided on the outer wall of the waterproof sleeve. The water-stop ring is located inside the prefabricated cover plate.

8. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The precast cover plate is a reinforced concrete precast cover plate.

9. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The cast-in-place structural layer is a reinforced concrete layer.

10. The post-cast strip structure for the basement roof slab as described in claim 1, characterized in that: The cast-in-place structural layer is in close contact with the lower surface of the precast cover plate.

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