Construction method for closing post-cast strip of building roof backfill in advance

Abstract

The invention discloses a building roof backfill post-cast strip early sealing construction method which comprises the following steps: after concrete construction on two sides of a post-cast strip is completed, cleaning construction joints of the post-cast strip in time; the post-cast strip is covered with a steel cover plate with the width larger than that of the post-cast strip; steel sleeves are welded and reserved on a steel cover plate of the post-cast strip at certain intervals, and the height of the steel sleeves is larger than that of a backfill soil finished surface; waterproof strips are placed between the steel cover plate and the concrete on the two sides of the post-cast strip, the steel cover plate presses the waterproof strips on the floor slab, and sealing of the post-cast strip is completed; other building construction methods such as a board waterproof layer, a protective layer and backfill are carried out in the normal construction procedure; after the retention time of the post-cast strip meets the requirement, post-cast strip concrete is poured into the post-cast strip from the reserved steel sleeve, and the steel sleeve is closed after concrete pouring is completed; water prevention and backfilling of the plate surface can be carried out after the post-cast strip steel cover plate is closed, and the post-cast strip does not need to be reserved and poured, so that the construction period is shortened.

Description

Technical Field

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

[0002] There is usually a certain thickness of backfill soil above the floor slabs of building basements, garage roofs, planting roofs, etc. Due to the large structural area, it is necessary to set up post-cast strips to prevent harmful cracks in the structure due to uneven temperature and shrinkage. Generally, the sealing time of the post-cast strips should be delayed by more than 45 days. The backfill soil can be backfilled after the post-cast strips are sealed (the waterproof layer, protective layer, etc. are completed). Therefore, a certain operating space must be reserved at the post-cast strips for the time being and not backfilled to create conditions for subsequent pouring. In order to ensure the quality of backfill soil, garage roof waterproofing and post-cast strip backfill, it is generally adopted that when backfilling soil above the top slab, the post-cast strip is reserved and not filled. After the post-cast strip meets the retention time requirements and is poured, the waterproofing construction is carried out and then the area is backfilled, which leads to extended construction period, the floor surface waterproofing layer and protective layer cannot be completed in one construction, many waterproof joints are retained, and the quality of waterproof construction cannot be guaranteed. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a method for early sealing of the post-cast strip of the building roof backfill, so as to ensure the quality of the post-cast strip and the waterproof construction therein, backfill the soil in advance, and save the construction period.

[0004] The method for early sealing of the post-cast strip of the building roof backfill provided by the present invention adopts the following technical scheme:

[0005] A method for early sealing of a building roof backfill post-casting strip comprises the following steps:

[0006] S1. After the concrete construction on both sides of the post-casting belt is completed, the construction joints of the post-casting belt shall be cleaned in time;

[0007] S2. Cover the post-cast strip with a steel cover plate whose width is greater than that of the post-cast strip;

[0008] S3. Weld a steel casing at a certain interval on the steel cover plate of the post-casting belt, and the height of the steel casing is greater than the finished surface of the backfill soil;

[0009] S4. Waterproof strips are placed between the steel cover plate and the concrete on both sides of the post-cast strip. The steel cover plate presses the waterproof strips tightly against the floor slab to complete the sealing of the post-cast strip.

[0010] S5. Carry out the construction of the slab waterproof layer, protective layer, backfill soil and other construction methods according to the normal construction procedures;

[0011] S6. After the retention time of the post-casting strip meets the requirements, pour the post-casting strip concrete from the reserved steel casing into the post-casting strip. After the concrete pouring is completed, close the steel casing.

[0012] Furthermore, the end of the waterproof strip extends inwardly of the post-cast strip and bends downward to fit against the side wall of the post-cast strip.

[0013] Furthermore, the waterproof strip is bent and fitted to one end of the side wall of the post-cast strip and extends upward, and an opening is provided on the bottom side of the steel cover plate for inserting the waterproof strip.

[0014] Furthermore, it also includes a formwork arranged at the bottom of the floor slab, and the formwork includes a formwork for closing the bottom of the post-cast strip and a formwork frame for supporting the formwork.

[0015] Furthermore, a water stop block is provided on the upper side of the template, and the water stop block abuts against the side walls of the post-cast strip.

[0016] Furthermore, the board surface waterproof layer covers the floor slab, the steel cover plate and the side wall of the steel casing.

[0017] In summary, the present invention includes at least one of the following beneficial effects: board surface waterproofing and backfilling can be carried out after the steel cover plate of the post-cast strip is closed, without waiting for the post-cast strip to be retained for casting, thus saving construction time; board surface waterproofing can be completed in one construction, reducing retained joints and ensuring the quality of waterproofing construction; the steel cover plate of the post-cast strip is closed in time to reduce the cleaning work of the post-cast strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Section view along line AA. DETAILED DESCRIPTION

[0020] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0021] The following is combined with Figure 1-2 The present invention is described in further detail.

[0022] The embodiment of the present invention discloses a method for early sealing of the backfilled post-cast strip of a building roof. Figure 1-2 The method for early sealing of the backfilled post-cast strip of the building roof comprises the following steps:

[0023] S1. After the concrete construction on both sides of the post-casting belt is completed, the construction joints of the post-casting belt shall be cleaned in time;

[0024] S2. Cover the post-cast strip with a steel cover plate 1 whose width is greater than that of the post-cast strip, and extend both sides of the steel cover plate 1 on the floor slab so that the steel cover plate can completely cover the space of the post-cast strip, thereby sealing the post-cast strip;

[0025] S3. A steel casing 2 is welded and reserved at a certain interval on the steel cover plate 1 of the post-cast strip. The number of steel casings 2 is determined according to the size of the post-cast strip. The height of the steel casing 2 is greater than the finished surface of the backfill soil. A through hole is formed on the steel cover plate 1 according to the size of the steel casing 2, so that the steel casing 2 can be just inserted into the through hole of the steel cover plate 1. The steel casing 2 is fixedly connected to the steel cover plate 1 by welding, so that the two steel casings and the steel cover plate 1 are integrated;

[0026] S4, a waterproof strip 3 is placed between the steel cover plate 1 and the concrete on both sides of the post-cast strip. The steel cover plate 1 presses the waterproof strip 3 against the floor slab to complete the sealing of the post-cast strip. The waterproof strip 3 is a rubber strip. The waterproof strip 3 can prevent leakage from between the steel cover plate 1 and the floor slab when pouring concrete, and the sealing effect is better.

[0027] S5, the normal construction procedure is to carry out the construction of the board surface waterproof layer 4, the protective layer 5, the backfill soil and other construction methods. The board surface waterproof layer 4 is made of waterproof membrane, which is laid on the floor slab and the steel cover 1. After the waterproof membrane is laid, cement mortar is laid on the waterproof membrane to form a waterproof protective layer 5;

[0028] S6. After the retention time of the post-casting strip meets the requirements, the post-casting strip concrete is poured from the reserved steel casing 2 into the post-casting strip. After the concrete pouring is completed, the steel casing 2 is closed. When pouring concrete, it is poured into the post-casting strip through the steel casing 2. The steel casing 2 forms a concrete pouring channel. The pouring continues until the steel bar tube 2 is filled with concrete. At the same time, the steel casing 2 is closed, which reduces the subsequent construction process.

[0029] In this embodiment, the end of the waterproof strip 3 extends into the inner edge of the post-cast strip and bends downward to fit the side wall of the post-cast strip. The waterproof strip 3 is glued to the floor slab by waterproof glue to seal the steel cover plate 1 and the floor slab. The waterproof strip 3 is fixed to the inner wall of the post-cast strip, which can further achieve a sealing effect and avoid water seepage between the waterproof strip 3 and the floor slab.

[0030] In this embodiment, the waterproof strip 3 is bent and fitted to one end of the side wall of the post-cast strip and extends upward. The bottom side of the steel cover plate 1 is provided with an opening for the insertion of the waterproof strip 3. Two parallel grooves are processed on the bottom side of the steel cover plate 1. The end of the waterproof strip 3 extends upward and is inserted into the groove. The downwardly extending part can block the concrete and enhance the sealing effect between the floor slab and the steel cover plate 1.

[0031] In this embodiment, it also includes a formwork 6 arranged at the bottom of the floor slab, and the formwork 6 includes a template 61 for closing the bottom of the post-cast strip and a formwork frame 62 for supporting the template 61. The formwork frame 62 is provided with wooden blocks for making the template 61, so that the template 61 can completely seal the bottom of the post-cast strip.

[0032] In this embodiment, a water stop block 63 is provided on the upper side of the template 61, and the water stop block 63 abuts against the side walls of the post-cast strip. The water stop block 63 is made of rubber blocks. After the template 61 is fixed on the floor slab, the water stop block 63 is pasted and fixed on the template 61, and the two sides of the water stop block 63 are pasted and fixed on the side walls of the post-cast strip. The water stop block 63 can seal the gap between the template 61 and the floor slab to prevent leakage from the gap between the template 61 and the floor slab.

[0033] In this embodiment, the board surface waterproof layer 4 covers the floor slab, the steel cover plate 1 and the side walls of the steel casing 2. After the waterproof membrane covers the floor slab and the steel cover plate 1, it wraps the side walls of the steel casing 2 to prevent leakage at the welding point between the steel casing 2 and the steel cover plate 1.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A method for early sealing of a building roof backfill post-casting strip, characterized in that: The following steps are involved: S1. After the concrete construction on both sides of the post-casting belt is completed, the construction joints of the post-casting belt shall be cleaned in time; S2, using a steel cover plate (1) with a width greater than that of the post-cast strip to cover the post-cast strip; S3. A steel casing (2) is welded and reserved at a certain interval on the steel cover plate (1) of the post-casting zone, and the height of the steel casing (2) is greater than the finished surface of the backfill soil; S4, placing a waterproof strip (3) between the steel cover plate (1) and the concrete on both sides of the post-cast strip, and the steel cover plate (1) presses the waterproof strip (3) against the floor slab to complete the sealing of the post-cast strip; S5. Perform the construction of the slab waterproofing layer (4), protective layer (5), backfilling and other construction methods according to the normal construction procedure; S6. After the retention time of the post-casting strip meets the requirement, the post-casting strip concrete is poured from the reserved steel casing (2) into the post-casting strip. After the concrete pouring is completed, the steel casing (2) is closed.

2. The method for early sealing of the backfilled post-cast strip of the building roof according to claim 1, characterized in that: The end of the waterproof strip (3) extends inside the post-cast strip and is bent downward to fit on the side wall of the post-cast strip.

3. The method for early sealing of the backfilled post-cast strip of the building roof according to claim 5, characterized in that: The waterproof strip (3) is bent and fitted on one end of the side wall of the post-cast strip and extends upwards, and an opening is provided on the bottom side of the steel cover plate (1) for inserting the waterproof strip (3).

4. The method for early sealing of the backfilled post-cast strip of the building roof according to claim 1, characterized in that: It also includes a formwork (6) arranged at the bottom of the floor slab, wherein the formwork (6) includes a template (61) for closing the bottom of the post-cast strip and a formwork frame (62) for supporting the template (61).

5. The method for early sealing of the backfilled post-cast strip of the building roof according to claim 5, characterized in that: A water stop block (63) is provided on the upper side of the template (61), and the water stop block (63) abuts against the side walls of the post-casting strip on both sides.

6. The method for early sealing of the backfilled post-cast strip of the building roof according to claim 1, characterized in that: The board surface waterproof layer (4) covers the floor slab, the steel cover plate (1) and the side wall of the steel casing (2).

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