Quickly dense pouring structure and process for basement post-cast strip pipeline

Abstract

The invention discloses a basement post-cast strip pipeline quick and dense pouring structure which comprises a plurality of sets of reinforcing meshes located in a basement post-cast strip, a plurality of prefabricated cover plates installed on the top of the basement post-cast strip, a plurality of embedded pipelines fixedly installed in the pouring holes of the prefabricated cover plates, and a plurality of reinforcing meshes arranged on the top of the basement post-cast strip, and pouring holes are formed in at least two of the prefabricated cover plates. A water stop wing ring and a waterproof sealing module are fixedly connected to the outer wall of the embedded pipeline, the waterproof sealing module comprises a waterproof layer and a protective layer which are arranged on the periphery of the prefabricated cover plate and the periphery of the embedded pipeline, the embedded pipeline is a cast iron pipe with the diameter being 300 mm, the thickness of the prefabricated cover plate is 100 mm, and the prefabricated cover plate is of a reinforced concrete structure with the mark number being C20. The method has the advantages that permanent sealing of the top of the post-cast strip can be completed before settlement of the main body structure is stable through the prefabricated cover plate and the waterproof sealing module, so that soil backfilling and subsequent procedures of the basement top plate can be intervened in advance, the total project construction period is effectively shortened, and the capital cost and the management cost are remarkably reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a rapid and dense casting structure and process for post-cast strip pipes in underground parking garages. Background Technology

[0002] In large-scale construction projects, to address issues such as differential settlement between the main high-rise building and the lower-rise podium, shrinkage deformation of structural concrete, and temperature stress, post-cast strips are typically installed in the basement floor slab, exterior walls, and roof slab. These post-cast strips temporarily divide the structure into several independent sections. Once the main structure's settlement has largely stabilized (usually after 60 days) or the concrete has completed most of its shrinkage deformation, micro-expansion concrete of a higher strength grade than the original design is poured to connect them into a unified whole.

[0003] This will lead to some problems:

[0004] 1. Construction delays. The post-construction strip can only be closed after the main structure has settled and stabilized, which usually takes several months. This prevents subsequent processes such as backfilling the basement roof and outdoor works from being carried out in advance, thus extending the overall construction period.

[0005] 2. The long-term openness of the post-cast strip poses a significant safety hazard. Rainwater, construction water, and domestic sewage can easily seep into the post-cast strip and basement, causing water accumulation that requires continuous pumping, consuming a large amount of manpower and resources.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the above-mentioned defects and provide a rapid and dense casting structure and process for post-cast strip pipes in underground parking garages.

[0008] To solve the above-mentioned technical problems, the technical solution provided by the present invention is: a rapid-density casting structure for post-cast strip pipes in underground parking garages, comprising:

[0009] Multiple sets of steel mesh located within the post-cast strip of the basement;

[0010] Several precast cover plates are installed on top of the post-cast strip of the basement, and at least two of the precast cover plates have casting holes.

[0011] Several pre-embedded pipes are fixedly installed in the casting holes of the precast cover plate, and water-stop wing rings are fixedly connected to the outer wall of the pre-embedded pipes;

[0012] Waterproof sealing modules include waterproof and protective layers around precast cover plates and embedded pipes.

[0013] A further preferred embodiment of the present invention is that the pre-embedded pipe is a cast iron pipe with a diameter of 300 mm.

[0014] A further preferred embodiment of the present invention is that the thickness of the prefabricated cover plate is 100mm.

[0015] A further preferred embodiment of the present invention is that the precast cover plate is a reinforced concrete structure, designated as C20.

[0016] A further preferred embodiment of the present invention is that the waterproof layer comprises a waterproof leveling layer and a root-penetration resistant waterproof membrane layer laid sequentially from bottom to top.

[0017] A further preferred embodiment of the present invention is that the protective layer is a fine stone concrete layer laid under the waterproof layer, and its grade is not lower than C20.

[0018] A further preferred embodiment of the present invention includes the following steps:

[0019] S1. First, remove the construction waste, laitance and debris from the post-cast strip of the basement, and roughen the concrete interface on both sides to expose the stones to enhance the bonding strength between the new and old concrete.

[0020] S2. Install multiple layers of steel mesh for support and separation within the post-cast strip of the basement;

[0021] S3. Install the pre-embedded pipes on two of the precast cover plates with pouring holes, and make the water-stop wing ring abut against the precast cover plate.

[0022] S4. Install multiple precast cover plates on top of the post-cast strip of the basement and seal the joints.

[0023] S5. Construct a waterproof layer and a protective layer around the precast cover plate and the embedded pipe in sequence;

[0024] S6. Backfilling with soil is carried out on top of the protective layer to achieve advanced closure of the top of the post-cast strip of the basement.

[0025] S7. After the main structure has settled and stabilized, micro-expansion concrete is injected into the cavity of the post-cast strip of the basement through the pre-embedded pipe.

[0026] S8. After pouring, cover with a film or geotextile for at least 14 days to ensure the concrete strength increases and its shrinkage compensation performance is realized.

[0027] A further preferred embodiment of the present invention is as follows: In step S7, the strength of the micro-expansion concrete is one grade higher than that of the concrete on both sides of the structure, and its slump is not less than 200mm, and it is pumped and poured using a concrete delivery pump.

[0028] Compared with the prior art, the present invention has the following advantages, including but not limited to:

[0029] 1. This invention uses prefabricated cover plates and waterproof sealing modules to permanently seal the top of the cast-in-place strip before the main structure settles and stabilizes. This allows for earlier intervention in the backfilling of the basement roof and subsequent processes, effectively shortening the overall project duration and significantly reducing capital and management costs.

[0030] 2. This invention forms a multi-layered, three-dimensional waterproofing system consisting of a "water-stopping wing ring (pipe self-waterproofing) + cover plate joint sealing + additional waterproofing layer + large-area waterproof membrane + concrete protective layer." It specifically addresses the waterproofing problem at the critical leakage point of pipe penetration through the slab, significantly improving the waterproofing reliability of the post-cast strip area. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a first structural diagram of the present invention;

[0033] Figure 2 This is a second structural diagram of the present invention.

[0034] As shown in the figure: 1. Post-cast strip of the basement; 2. Reinforcing mesh; 3. Precast cover plate; 4. Embedded pipes; 5. Water-stop wing ring; 6. Waterproof layer; 7. Protective layer. Detailed Implementation

[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0036] First embodiment:

[0037] Please refer to the instruction manual appendix. Figures 1-2 This embodiment discloses a rapid compaction casting structure and process for post-cast strip pipes in underground parking garages. In this embodiment, a rapid compaction casting structure for post-cast strip pipes in underground parking garages is included.

[0038] Specifically, the post-cast strip 1 of the basement is formed by the gap between two main building structures. Then, multiple sets of steel mesh 2 are installed inside the post-cast strip 1, respectively attached to several side walls of the post-cast strip 1, and also installed in the inner cavity of the post-cast strip 1. In addition, the multiple sets of steel mesh 2 are fixedly connected together to support and separate the entire post-cast strip 1.

[0039] Then, multiple precast cover plates 3 are fixedly installed at the top of the post-cast strip 1 of the basement. The precast cover plates 3 are made of reinforced concrete structure designated C20, and their thickness is 100 mm. Then, a sealing treatment is applied to the joints between the precast cover plates 3 and adjacent precast cover plates 3. In this embodiment, waterproof cement mortar is used to bond the joints between the precast cover plates 3 and adjacent precast cover plates 3.

[0040] Meanwhile, two of the precast cover plates 3 have casting holes at their top ends, and embedded pipes 4 are installed in the casting holes. In this embodiment, the embedded pipes 4 are made of cast iron pipes with a diameter of 300mm.

[0041] A water-stop ring 5 is fixedly connected to the lower part of the outer wall of the pre-embedded pipe 4, and the top of the water-stop ring 5 abuts against the bottom of the precast cover plate 3. This reduces the possibility of water leakage from the pouring hole and the gap of the pre-embedded pipe 4 into the post-cast strip 1 of the basement.

[0042] Then, a layer of fine aggregate concrete with a grade of C20 is first applied to the surface of the precast cover plate 3, and a protective layer 7 is then applied. In this embodiment, the protective layer 7 is trapezoidal truncated pyramidal in shape. Next, a waterproof layer 6 is applied around the outer wall of the embedded pipe 4. Specifically, the waterproof layer 6 includes a waterproof leveling layer and a root-penetration-resistant waterproof membrane layer laid sequentially from bottom to top. Finally, C20 grade concrete is applied to its surface as the outermost layer.

[0043] Second embodiment:

[0044] This invention also includes a rapid and dense pouring process for pipes in post-cast strips of underground parking garages, comprising the following steps:

[0045] Step 1, pre-construction treatment: First, remove construction waste, laitance and debris from the post-cast strip 1 of the basement, and roughen the concrete interface on both sides to expose the stones in the main building structure. This will enhance the bonding strength between the old and new concrete when the concrete is poured later.

[0046] Step 2: Place the reinforcing mesh 2. Install the reinforcing mesh 2 in the inner cavity of the post-cast strip 1 of the basement and on the four side walls.

[0047] Step 3: Install the pre-embedded pipes 4. Install the pre-embedded pipes 4 on two of the precast cover plates 3 with pouring holes, and make the water-stop wing rings 5 ​​abut against the precast cover plates 3.

[0048] Step 4: Install precast cover plates 3, install multiple precast cover plates 3 on top of the post-cast strip 1 of the basement, and use waterproof cement mortar to bond the precast cover plates 3 to the joints of the precast cover plates 3 and adjacent precast cover plates 3.

[0049] Step 5: Install the waterproof layer 6 and the protective layer 7. Apply the trapezoidal truncated pyramidal protective layer 7 to the surface of multiple precast cover plates 3. Then, apply the waterproof layer 6 around the outer wall of the embedded pipe 4.

[0050] Step 6: Backfilling with soil is carried out on top of the protective layer 7 to achieve the pre-sealing of the top of the post-cast strip 1 of the basement.

[0051] Step 7: After the main structure has settled and stabilized, inject micro-expansion concrete into the cavity of the post-cast strip 1 of the basement through the pre-embedded pipe 4, with a slump of not less than 200mm.

[0052] Step 8: After pouring, cover the outer wall of the protective layer 7 with a film or geotextile and cure for 14 days to ensure the concrete strength increases and its shrinkage compensation performance is achieved.

[0053] It should be noted that the strength of the micro-expansion concrete is one grade higher than that of the concrete on both sides of the structure, which is achieved by pumping and grouting using a concrete delivery pump.

[0054] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

[0055] In addition, all electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The specific implementation of this disclosure omits detailed descriptions of known functions and known components. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

Claims

1. A rapid-density casting structure for post-cast strip pipes in an underground parking garage, characterized in that, include: Multiple sets of steel mesh (2) located in the post-cast strip (1) of the basement; Several precast cover plates (3) are installed on top of the post-cast strip (1) of the basement, and at least two of the precast cover plates (3) have pouring holes. Several pre-embedded pipes (4) are fixedly installed in the casting holes of the precast cover plate (3), and water-stop wing rings (5) are fixedly connected to the outer wall of the pre-embedded pipes (4). The waterproof sealing module includes a waterproof layer (6) and a protective layer (7) around the precast cover plate (3) and the embedded pipe (4).

2. The rapid-tightening casting structure for post-cast strip pipes in a basement according to claim 1, characterized in that: The pre-embedded pipe (4) is a cast iron pipe with a diameter of 300mm.

3. The rapid-tightening casting structure for post-cast strip pipes in a basement according to claim 1, characterized in that: The thickness of the prefabricated cover plate (3) is 100mm.

4. The rapid-tightening casting structure for post-cast strip pipes in an underground parking garage according to claim 3, characterized in that: The precast cover plate (3) is a reinforced concrete structure, with a grade of C20.

5. The rapid-tightening casting structure for post-cast strip pipes in an underground parking garage according to claim 1, characterized in that: The waterproof layer (6) includes a waterproof leveling layer and a root-penetration resistant waterproof membrane layer laid from bottom to top.

6. The rapid-tightening casting structure for post-cast strip pipes in an underground parking garage according to claim 5, characterized in that: The protective layer (7) is a fine stone concrete layer laid under the waterproof layer (6), and its grade is not lower than C20.

7. A rapid and dense pouring process for post-cast strip pipes in underground parking garages according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. First, remove the construction waste, laitance and debris from the post-cast strip (1) of the basement, and roughen the concrete interface on both sides to expose the stones to enhance the bonding force between the new and old concrete. S2. Install multiple steel meshes (2) for support and separation in the post-cast strip (1) of the basement. S3. Install the pre-embedded pipes (4) on two of the precast cover plates (3) with casting holes, and make the water-stop wing ring (5) abut against the precast cover plate (3); S4. Install multiple precast cover plates (3) on top of the post-cast strip (1) of the basement and seal the joints. S5. A waterproof layer (6) and a protective layer (7) are constructed in sequence around the precast cover plate (3) and the embedded pipe (4). S6. Backfilling construction is carried out on the protective layer (7) to achieve the advanced closure of the top of the post-cast strip (1) of the basement; S7. After the main structure has settled and stabilized, micro-expansion concrete is injected into the cavity of the post-cast strip (1) of the basement through the pre-embedded pipe (4). S8. After pouring, cover with a film or geotextile for at least 14 days to ensure the concrete strength increases and its shrinkage compensation performance is realized.

8. The rapid and dense pouring process for post-cast strip pipes in an underground parking garage according to claim 7, characterized in that: In step S7, the strength of the micro-expansion concrete is one grade higher than that of the concrete on both sides of the structure, and its slump is not less than 200mm. It is pumped and poured using a concrete delivery pump.

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