Post-cast strip concrete formwork structure
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANXI MECHANIZATION CONSTRUCTION GROUP CO LTD
- Filing Date
- 2025-05-23
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, the formwork erection and concrete hardening time of post-pouring strips in the construction of underpasses are long, resulting in low construction efficiency of post-pouring strips and failing to address the low construction efficiency of external wall waterproofing layer construction and backfilling.
The precast reinforced concrete formwork structure is used, which is connected by bolts and waterstop plates. It is prefabricated, reducing on-site construction time. After the concrete hardens, the exterior wall waterproofing layer and backfilling can be carried out without removing the formwork.
By advancing the backfilling process, the construction period is saved, the construction efficiency of the post-pouring strip is improved, the project is delivered on time, and the construction quality and waterproofing effect are enhanced.
Smart Images
Figure CN224228249U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building formwork technology, and in particular to a formwork structure for post-cast strip concrete. Background Technology
[0002] The construction of an underpass is a complex and systematic project, requiring a large amount of formwork during the main structure construction. The construction process for the underpass also has specific time requirements.
[0003] In the existing technology, after the last section of the main structure of two adjacent sections of the underpass is completed, it is necessary to wait 28 days before the formwork of the post-pouring strip can be erected. The construction of the post-pouring strip must be carried out 45 days after the top slab concrete is poured. After the post-pouring strip concrete is poured, it is cured until it reaches the design strength requirements, and then the construction of the external wall waterproof layer and backfilling are carried out in sequence.
[0004] The existing exterior wall formwork will be removed after the concrete inside hardens to the design strength. During the concrete hardening period, the exterior wall waterproofing layer construction and backfilling construction cannot be carried out, resulting in low construction efficiency of the post-pouring strip. Utility Model Content
[0005] This utility model aims to solve, at least to a certain extent, one of the technical problems in the related art.
[0006] Therefore, the purpose of this utility model is to propose a post-cast strip concrete formwork structure that can accelerate the backfilling progress of buildings and improve the efficiency of post-cast strip construction.
[0007] To achieve the above objectives, this utility model proposes a post-cast strip concrete formwork structure, comprising:
[0008] Precast reinforced concrete formwork;
[0009] Multiple screws, one end of which is connected to the same side of the precast reinforced concrete formwork, and the other end of which is used to penetrate conventional formwork;
[0010] A water-stop plate is located in the middle of the screw.
[0011] According to the post-pouring strip concrete formwork structure of this utility model, by setting up a precast reinforced concrete formwork, multiple screws are connected to the same surface of the precast reinforced concrete formwork. The precast reinforced concrete formwork can be pre-manufactured, reducing on-site construction time. After the post-pouring strip concrete is poured, the precast reinforced concrete formwork does not need to be removed before subsequent external wall waterproofing layer construction and backfilling construction can be carried out, which advances the backfilling process, thereby saving a lot of construction time and improving the efficiency of post-pouring strip construction.
[0012] According to one embodiment of the present invention, a sleeve is further included, the sleeve having an internal thread, the sleeve being embedded in the precast reinforced concrete template for threaded connection with one end of the screw.
[0013] According to one embodiment of the present invention, the cross-section of the water-stop sheet is quadrilateral, and the water-stop sheet is welded to the middle part of the screw.
[0014] According to one embodiment of the present invention, the number of screws is 3 to 10.
[0015] According to one embodiment of the present invention, the precast reinforced concrete formwork is provided with a first step and a second step at both ends along a first direction, and the first step and the second step are complementary.
[0016] According to one embodiment of the present invention, a sealant is also included, which is applied to the gap between the sleeve and the screw.
[0017] According to one embodiment of the present invention, the cross-section of the water-stop sheet is square, and the side length of the water-stop sheet is 100mm.
[0018] According to one embodiment of the present invention, the thickness of the first step or the second step is half the thickness of the precast reinforced concrete formwork.
[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:
[0021] Figure 1 This is a schematic diagram of the post-cast strip concrete formwork structure proposed in one embodiment of this utility model.
[0022] Figure 2 This is a cross-sectional schematic diagram of an example of the application of the post-cast strip concrete formwork structure proposed in an embodiment of this utility model to an airport underpass.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1-Screw rod, 2-Waterstop plate, 3-Precast reinforced concrete formwork, 4-Conventional formwork, 5-Sleeve, 6-Subbase, 7-Base plate, 31-First step, 32-Second step. Detailed Implementation
[0025] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.
[0026] The following is for reference. Figure 1 and Figure 2 This describes the post-cast strip concrete formwork structure according to an embodiment of the present utility model.
[0027] See Figure 1 The post-cast strip concrete formwork structure according to the present utility model includes a precast reinforced concrete formwork 3, multiple screw rods 1, and a waterstop plate.
[0028] Precast reinforced concrete formwork 3 is typically manufactured in a factory and has an internal steel reinforcement skeleton, with the concrete layer encasing the outside of the skeleton. The type of precast reinforced concrete formwork 3 is determined based on actual needs and is not limited thereto. For example, the precast reinforced concrete formwork 3 is generally rectangular in shape for ease of fabrication. One end of the screw rod 1 connects to the same side of the precast reinforced concrete formwork 3, and the other end of the screw rod 1 is used to penetrate the conventional formwork 4. One end of the screw rod 1 can be connected via pre-embedded connectors within the precast reinforced concrete formwork 3. The screw rod is a key connector in construction used to fix the formwork, withstand the lateral pressure of the concrete, and ensure the stability of the formwork structure. The number of screw rods 1 is selected according to actual needs. A waterstop 2 is located in the middle of the screw rod 1 and is directly embedded in the concrete to form a waterproof barrier. The specific shape of the waterstop 2 is selected according to actual needs.
[0029] Post-cast strip concrete formwork structures can be practically applied to various types of engineering construction, such as... Figure 2 As shown, during the construction of the airport underpass, a base slab 7 is installed on the foundation layer 6. The post-cast concrete formwork structure is vertically installed, and the exterior walls of the structure are fitted with precast reinforced concrete formwork 3. The interior walls use conventional formwork 4. After the precast reinforced concrete formwork 3 and the conventional formwork 4 are connected by bolts 1, concrete is poured into the interior space. Subsequent exterior wall waterproofing and backfilling can be carried out without waiting for the concrete to harden. After the concrete hardens, the precast reinforced concrete formwork 3 does not need to be removed; it remains in place. Only the conventional formwork needs to be removed for subsequent reuse.
[0030] According to the post-cast strip concrete formwork structure of this utility model embodiment, by setting up a precast reinforced concrete formwork, multiple screws are connected to the same surface of the precast reinforced concrete formwork. The precast reinforced concrete formwork can be pre-manufactured, reducing on-site construction time. After the post-cast strip concrete is poured, the precast reinforced concrete formwork does not need to be removed before subsequent external wall waterproofing layer construction and backfilling construction can be carried out, that is, the backfilling process is brought forward, thereby saving a lot of construction time and improving the efficiency of post-cast strip construction.
[0031] like Figure 1 As shown, in some embodiments, the post-cast concrete formwork structure also includes a sleeve 5 with internal threads. The sleeve 5 is pre-embedded in the precast reinforced concrete formwork 3 for threaded connection with one end of the screw rod 1. The sleeve 5 is a pre-embedded connector, and the number of sleeves 5 corresponds to the number of screw rods 1. Since the sleeves are pre-embedded in the precast reinforced concrete formwork 3, the water-stop screw rod only needs to be screwed into the sleeve on site, which greatly simplifies the installation steps and improves construction efficiency. In one example, the sleeve 5 is an M14×1.5 internally threaded sleeve, which is precisely positioned and pre-embedded inside the precast reinforced concrete formwork 3 to fix one end of the screw rod 1, improving the overall waterproof performance.
[0032] The number of screws 1 can be 3 to 10, and the number of screws 1 is selected according to the load conditions. For example, the diameter of screw 1 is 14mm, the length is 1500mm, and the pitch is 1.5mm.
[0033] The post-cast concrete formwork structure also includes sealant, which is applied to the gap between sleeve 5 and bolt 1. The sealant effectively prevents moisture from seeping into the structure through the bolt holes. The type of sealant is selected based on actual needs. For example, silicone sealant is chosen, providing good sealing performance.
[0034] The waterstop 2 has a quadrilateral cross-section and is welded to the middle of the screw 1. The quadrilateral cross-section of the waterstop 2 provides a larger surface area for contact with the concrete, increasing the adhesion between the waterstop 2 and the concrete. In one example, the waterstop 2 has a square cross-section, with a side length of 100mm and a thickness of 3mm, and is fully welded to the screw 1 on both sides.
[0035] In some embodiments, such as Figure 1 As shown, the precast reinforced concrete formwork 3 has a first step 31 and a second step 32 at both ends along the first direction, which are complementary. The first step 31 and the second step 32 overlap to form a thickness consistent with the body of the precast reinforced concrete formwork 3, enabling a seamless connection between the precast reinforced concrete formworks. In other words, the precast reinforced concrete formwork 3 can overlap to form a structure suitable for large-area exterior wall casting. In one example, the thickness of the first step 31 or the second step 32 is half the thickness of the precast reinforced concrete formwork 3.
[0036] It should be noted that after the precast reinforced concrete formwork 3 is installed, external waterproofing is required. After the waterproofing inspection is passed, backfilling can be carried out without affecting the construction progress of the post-pouring strip.
[0037] As can be seen from the above, the post-cast strip concrete formwork structure of this utility model can optimize the construction process, significantly shorten the backfilling time, thereby shortening the overall construction period, ensuring on-time project delivery, and saving construction costs. At the same time, the application of this structure improves construction quality; the simple structural design ensures the quality of the post-cast strip construction and provides better waterproofing.
[0038] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0041] In the description of this utility model, the terms "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0042] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.
[0043] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A post-cast concrete formwork structure, characterized in that, include: Precast reinforced concrete formwork (3); Multiple screws (1), one end of which is connected to the same side of the precast reinforced concrete formwork (3), and the other end of which is used to penetrate the conventional formwork (4). A water-stop plate (2) is provided in the middle of the screw (1); Sleeve (5), which has an internal thread, is embedded in the precast reinforced concrete template (3) for threaded connection with one end of the screw (1).
2. The post-cast strip concrete formwork structure according to claim 1, characterized in that, The cross-section of the water-stop plate (2) is quadrilateral, and the water-stop plate (2) is welded to the middle part of the screw (1).
3. The post-cast strip concrete formwork structure according to claim 1, characterized in that, The number of screws (1) is 3 to 10.
4. The post-cast strip concrete formwork structure according to claim 1, characterized in that, The precast reinforced concrete formwork (3) is provided with a first step (31) and a second step (32) at both ends along the first direction, and the first step (31) and the second step (32) are complementary.
5. The post-cast strip concrete formwork structure according to claim 1, characterized in that, It also includes a sealant, which is applied to the gap between the sleeve (5) and the screw (1).
6. The post-cast strip concrete formwork structure according to claim 1, characterized in that, The cross-section of the waterstop (2) is square, and the side length of the waterstop (2) is 100mm.
7. The post-cast strip concrete formwork structure according to claim 4, characterized in that, The thickness of the first step (31) or the second step (32) is half the thickness of the precast reinforced concrete formwork (3).