Construction method of post-cast strip independent support

Abstract

The invention belongs to the technical field of engineering construction, and discloses a post-cast strip independent support construction method, which comprises the following steps: firstly, designing an independent support arrangement diagram, then arranging point positions according to the independent support arrangement diagram, pre-burying positioning pieces, mounting a frame body and a template at the arranged point positions, and forming holes in the template according to the independent support arrangement diagram. And then a supporting pipe is installed at the hole, the positioning piece extends into the supporting pipe, concrete is poured into the supporting pipe and vibrated densely, then concrete pouring of the current-layer structure is carried out, after the concrete strength grade of the current-layer structure meets the construction requirement, the formwork is removed, concrete pouring of the post-pouring belt is carried out, and then the supporting pipe is removed. Through the arrangement, the construction method of the post-cast strip independent support can conveniently and effectively support the post-cast strip, the construction efficiency is improved, and the construction cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, and in particular to a construction method for independently supporting a post-cast strip. Background Art

[0002] At present, the traditional post-casting belt support system generally uses scaffolding to separate the support system of the post-casting belt from the support system of the underground garage. When removing the mold, the independent post-casting belt support system is not removed, and it will be removed after the post-casting belt construction is completed. However, the post-casting belt is generally not closed until the settlement or shrinkage of the building is basically stable, so the support system on both sides of the post-casting belt needs to be maintained for a long time, which brings the following problems to the long-term construction work:

[0003] (1) The beam and slab formwork at the post-casting zone needs to be supported separately and cannot be removed, thus occupying a large amount of turnover materials;

[0004] (2) The demolition time of the post-cast strip support frame and the surrounding frames is inconsistent. In order to achieve the separate demolition of the two, the connection relationship between the post-cast strip frame and the surrounding frames is complicated, the construction is cumbersome and the cost is high.

[0005] (3) The post-cast strip support system occupies a large space, affects subsequent construction, and is inconvenient for construction operations.

[0006] (4) The post-cast joint support system is often privately dismantled and then rebuilt at the construction site, which can easily cause problems such as structural cracks.

[0007] Therefore, a construction method for independently supporting a post-cast strip is urgently needed to solve the above technical problems. Summary of the invention

[0008] The purpose of the present invention is to provide a construction method for independently supporting a post-cast strip, which can facilitate effective support of the post-cast strip, improve construction efficiency and save construction costs.

[0009] To achieve this object, the present invention adopts the following technical solutions:

[0010] A construction method for independently supporting a post-cast belt, comprising:

[0011] Step 1: Design independent support layout;

[0012] Step 2: Arrange points according to the independent support layout diagram, and embed positioning parts at the arrangement points;

[0013] Step 3: Install the frame and template, and drill holes in the template according to the independent support layout diagram;

[0014] Step 4: Install the support tube at the opening so that the positioning piece extends into the support tube;

[0015] Step 5: pour concrete in the support pipe and vibrate to make it dense;

[0016] Step 6: pouring concrete of the layer structure;

[0017] Step 7: Remove the template;

[0018] Step 8: pouring concrete of the post-cast zone;

[0019] Step 9: Remove the support tube.

[0020] Optionally, in step one, the diameter of the support pipe itself and the setting spacing are calculated according to the construction drawing.

[0021] Optionally, in step 2, the positioning member includes an anchoring section and an extension section, the anchoring section is connected to the main structure, the extension section is used to extend into the support tube, and the extension direction of the anchoring section and the extension direction of the extension section are set at an angle.

[0022] Optionally, in step three, a hole is made in the template using a template hole opener, and the hole is polished.

[0023] Optionally, in step four, support pipes are arranged at intervals on opposite sides of the post-cast strip, and two ends of the support pipes are respectively connected to the upper structural layer and the lower structural layer.

[0024] Optionally, the length of the support tube = layer height - thickness of the structural layer itself + five millimeters.

[0025] Optionally, a connecting piece is extended in the support tube, and before the support tube is installed, the connecting piece is connected to the positioning piece.

[0026] Optionally, in step five, the concrete in the support tube is poured in layers, and the layered pouring height is ≤500 mm.

[0027] Optionally, C20 fine stone concrete is poured inside the support pipe.

[0028] Optionally, in step eight, the concrete of the post-cast zone is poured two weeks after the main structure is capped.

[0029] Beneficial effects of the present invention:

[0030] The present invention provides a construction method for independent support of post-cast strips. First, an independent support layout diagram is designed to clarify the layout and points of the post-cast strip support system, providing guidance for subsequent construction. Then, points are arranged according to the independent support layout diagram, and positioning parts are embedded at the arranged points to ensure the accuracy and stability of the post-cast strip support system. By embedding positioning parts, accurate positioning and fixing points are provided for the installation of support pipes, which is conducive to reducing construction errors. Then, a frame and a template are installed, and holes are opened on the template according to the independent support layout diagram so as to install the support pipe at the opening, thereby improving construction efficiency. During the installation of the support pipe, the positioning parts are extended into the support pipe, and then concrete is poured in the support pipe and vibrated to be dense, which is not only conducive to improving the connection strength and stability between the positioning parts and the support pipe, but also, by pouring concrete in the support pipe to form a good support for the building structure, there is no need to adopt a complex support system, which is conducive to material turnover and cost saving. Then, the concrete pouring of the current layer structure is carried out. When the concrete strength grade of the current layer structure reaches the construction requirements, the formwork is removed, and the concrete pouring of the post-casting strip is carried out to ensure the connection strength and stability between the post-casting strip and the building structure. After that, the support pipe is removed, so that the concrete column in the support pipe serves as an independent support for the post-casting strip. Through the above-mentioned arrangement, the construction method of the post-casting strip independent support of the present application can facilitate the effective support of the post-casting strip, improve the construction efficiency, and save the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flow chart of a construction method for independent support of a post-cast strip provided by an embodiment of the present invention;

[0032] Figure 2 is a plan view of the main structure provided by an embodiment of the present invention;

[0033] Figure 3 It is a cross-sectional view of the main structure provided by an embodiment of the present invention.

[0034] In the figure:

[0035] 100. Main structure; 101. Upper structural layer; 102. Lower structural layer; 1. Positioning piece; 11. Anchoring section; 12. Extension section; 2. Support pipe; 3. Connecting piece. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0037] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0040] like Figure 1-Figure 3 As shown, this embodiment provides a construction method for independently supporting a post-cast strip, and the construction method for independently supporting a post-cast strip includes the following steps:

[0041] Step 1: Design independent support layout.

[0042] Specifically, in step 1, according to the construction drawings, the diameter and spacing of the support pipe 2 are calculated. It can be understood that the diameter of the support pipe 2 is calculated based on the load requirements of the building structure, the bearing capacity of the support pipe 2 and the actual situation of the construction site, and it is ensured that the arrangement of the support pipe 2 can effectively support the post-casting strip and the surrounding structural system. Such an arrangement helps to reduce construction errors, improve construction efficiency, and ensure the safety and stability of the building structure.

[0043] More specifically, in this embodiment, the support pipe 2 is made of PVC pipe or PPR pipe, and no particular limitation is imposed on the specific material of the support pipe 2, as long as the above-mentioned functions can be achieved.

[0044] Step 2: Arrange points according to the independent support layout diagram, and embed positioning members 1 at the arrangement points. The positioning members 1 are provided to not only facilitate the effective connection between the concrete column in the support tube 2 and the main structure 100, but also prevent the concrete column from collapsing due to external forces during use.

[0045] Specifically, in step 2, the positioning member 1 includes an anchoring section 11 and an extension section 12. The anchoring section 11 is connected to the main structure 100 to ensure that the positioning member 1 can be firmly fixed on the main structure 100. The extension section 12 is used to extend into the support pipe 2, which can effectively guide the installation of the support pipe 2, ensure the accurate installation position of the support pipe 2, and improve the stability and bearing capacity of the independent support of the post-casting strip. The extension direction of the anchoring section 11 and the extension direction of the extension section 12 are set at an angle, which improves the connection strength between the positioning member 1 and other components, and helps to improve the stability of the building structure.

[0046] More specifically, in this embodiment, the positioning member 1 uses φ12 steel bars to fix the steel bars, so that the materials can be obtained locally, and the anchoring section 11 and the extension section 12 are arranged perpendicular to each other. In other embodiments, the positioning member 1 can also use components such as screws, and the specific structure of the positioning member 1 is not limited here, as long as the above-mentioned functions can be achieved.

[0047] Step 3: Install the frame and template, and drill holes in the template according to the independent support layout diagram.

[0048] Specifically, in step three, a hole is opened in the template by a template hole opener, and the hole is polished so that the support tube 2 can be accurately installed in the hole in subsequent operations, which helps to improve the stability and bearing capacity of the overall structure and reduce construction errors and safety hazards. The specific structure and working principle of the template hole opener are clear to those skilled in the art and will not be described in detail here.

[0049] Step 4: Install the support tube 2 at the opening so that the positioning member 1 extends into the support tube 2.

[0050] Specifically, in step 4, the support pipes 2 are arranged at intervals on the opposite sides of the post-cast strip to provide uniform support force. The two ends of the support pipe 2 are respectively connected to the upper structure layer 101 and the lower structure layer 102, which can ensure the firm connection between the independent support of the post-cast strip and the main structure 100, and improve the overall stability and bearing capacity of the main structure 100.

[0051] It should be noted that during the installation of the support tube 2, the verticality of the support tube 2 needs to be inspected and controlled to ensure that the support tube 2 maintains the correct position and direction to avoid structural distortion, tilting and collapse, thereby improving the stability of the entire structure.

[0052] More specifically, the length of the support tube 2 = layer height - thickness of the structural layer itself + five millimeters. Among them, the layer height is generally 2.6 to 5.8 meters, and the thickness of the structural layer itself generally refers to the plate thickness or beam height. The plate thickness is generally 80 to 160 millimeters, and the beam height is generally 200 to 400 millimeters. This setting ensures that the support tube 2 can not only effectively support the load between the upper structural layer 101 and the lower structural layer 102, but also ensure the support effect of the support tube 2, avoiding the problem of inconvenient installation or poor support effect caused by the support tube 2 being too long or too short. By setting a five-millimeter reserved gap, it helps the support tube 2 adapt to small construction errors and concrete expansion, and improves the adaptability and stability of the support tube 2.

[0053] More specifically, a connecting piece 3 is extended in the support tube 2. Before installing the support tube 2, the connecting piece 3 is connected to the positioning piece 1, which can further enhance the connection strength and stability between the support tube 2 and the main structure 100, and can prevent the support tube 2 from being displaced or deformed when pouring concrete or bearing loads, thereby ensuring the overall stability and safety of the independent support of the post-cast strip.

[0054] Among them, the connector 3 of this embodiment uses φ12 steel bars, which are inserted into the support tube 2 and tied and connected with the positioning member 1 by the φ12 steel bars to improve the connection strength between the above components. Moreover, the connector 3 itself is generally 250 mm higher than the top plate of the current structure to facilitate the construction of the next structure. When the current structure is the basement roof, the height of the φ12 steel bar is consistent with the height of the top plate of the current structure. In other embodiments, the connector 3 can also be made of carbon fiber or glass fiber. The specific structure of the connector 3 is not limited too much here, as long as it can achieve the above functions.

[0055] Step 5: Pour concrete into the support pipe 2 and vibrate to compact it.

[0056] Specifically, in step 5, the concrete in the support tube 2 is poured in layers, and the layered pouring height is ≤500 mm, which helps to control the pouring speed and temperature of the concrete, and prevents temperature cracks and shrinkage cracks caused by pouring too fast or at too high a temperature. At the same time, layered pouring can also ensure the uniform distribution and density of the concrete in the support tube 2, and improve the bearing capacity and durability of the independent support of the post-casting strip.

[0057] Specifically, C20 fine stone concrete is used for pouring in the support tube 2. It is understandable that due to the narrow space in the support tube 2, it is not convenient for pouring concrete. However, since C20 fine stone concrete has high fluidity and filling properties, it can better fill the gaps in the support tube 2. By pouring fine stone concrete, the density and strength of the concrete in the support tube 2 can be effectively guaranteed, avoiding the failure of independent support due to the lack of concrete density, and even bringing structural safety risks. Moreover, the use of low-grade concrete facilitates later demolition, avoiding the problem of difficult demolition in the later stage caused by the use of higher-grade concrete.

[0058] Step 6: Concrete pouring of the current layer structure. By pouring concrete of the current layer structure, the quality of the concrete of the current layer structure is ensured, thereby improving the overall stability and bearing capacity of the building structure. At the same time, the concrete pouring of the current layer structure also helps the smooth progress of subsequent construction.

[0059] Step 7: Remove the formwork. Removing the formwork can provide convenience and space for subsequent construction, and also help reduce construction period and cost. At the same time, removing the formwork can also ensure the surface flatness and aesthetics of the concrete structure, improving the overall quality of the building structure.

[0060] Step 8: Concrete pouring of the post-cast strip. This arrangement helps to enhance the connection strength and stability between the post-cast strip and the main structure 100. At the same time, concrete pouring of the post-cast strip can also reduce structural weaknesses and safety hazards caused by construction joints, and improve the overall bearing capacity and seismic performance of the main structure 100.

[0061] Specifically, in step eight, two weeks after the main structure 100 is capped, the post-cast zone concrete is poured. This arrangement can ensure that the main structure 100 has been fully solidified and stabilized, reducing the impact of the deformation of the main structure 100 on the post-cast zone concrete, thereby improving the overall stability and safety of the main structure 100.

[0062] Step nine, remove the support tube 2, so that the concrete column in the support tube 2 can be used as an independent support for the post-cast strip. This not only eliminates the need for a complex support system, but also facilitates material turnover and saves costs, and avoids the situation where the post-cast strip support returns to the top after removal.

[0063] It should be noted that the present embodiment provides a construction method for independent support of post-cast strips. First, an independent support layout diagram is designed to clarify the layout and points of the post-cast strip support system and provide guidance for subsequent construction. Then, the points are arranged according to the independent support layout diagram, and the positioning members 1 are embedded at the arranged points to ensure the accuracy and stability of the post-cast strip support system. By embedding the positioning members 1, accurate positioning and fixing points are provided for the installation of the support tube 2, which is conducive to reducing construction errors. Then, the frame and the template are installed, and holes are opened on the template according to the independent support layout diagram so that the support tube 2 can be installed at the opening, thereby improving the construction efficiency. During the installation of the support tube 2, the positioning member 1 is extended into the support tube 2, and then concrete is poured in the support tube 2 and vibrated to be dense, which is not only conducive to improving the connection strength and stability between the positioning member 1 and the support tube 2, but also, by pouring concrete in the support tube 2 to form a good support for the building structure, there is no need to adopt a complex support system, which is conducive to material turnover and cost saving. Then, the concrete pouring of the current layer structure is carried out. When the concrete strength grade of the current layer structure reaches the construction requirements, the formwork is removed, and the concrete pouring of the post-casting strip is carried out to ensure the connection strength and stability between the post-casting strip and the building structure. After that, the support pipe 2 is removed, so that the concrete column in the support pipe 2 serves as an independent support for the post-casting strip. Through the above arrangement, the construction method of the post-casting strip independent support of this embodiment can facilitate the effective support of the post-casting strip, improve the construction efficiency, and save the construction cost.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The construction method of independent support of post-cast belt is characterized by: include: Step 1: Design independent support layout; Step 2: Arrange points according to the independent support layout diagram, and embed positioning parts (1) at the arrangement points; Step 3: Install the frame and template, and drill holes in the template according to the independent support layout diagram; Step 4: Install the support tube (2) at the opening so that the positioning member (1) extends into the support tube (2); Step 5: pouring concrete in the support pipe (2) and vibrating it to make it dense; Step 6: pouring concrete of the layer structure; Step 7: Remove the template; Step 8: pouring concrete of the post-cast zone; Step 9: Remove the support tube (2).

2. The construction method of independent support of post-cast strip according to claim 1 is characterized in that: In step one, the diameter of the support pipe (2) and the setting spacing are calculated according to the construction drawing.

3. The construction method of independent support of post-cast strip according to claim 1 is characterized in that: In step 2, the positioning member (1) comprises an anchoring section (11) and an extension section (12), the anchoring section (11) is connected to the main structure (100), and the extension section (12) is used to extend into the support tube (2), and the extension direction of the anchoring section (11) and the extension direction of the extension section (12) are arranged at an angle.

4. The construction method of independent support of post-cast strip according to claim 1 is characterized in that: In step three, a hole is made in the template using a template hole opener, and the hole is polished.

5. The construction method of independent support of post-cast strip according to claim 1 is characterized in that: In step 4, the support pipes (2) are arranged at intervals on two opposite sides of the post-casting strip, and the two ends of the support pipes (2) are respectively connected to the upper structural layer (101) and the lower structural layer (102).

6. The construction method of independent support of post-cast strip according to claim 1 is characterized in that: The length of the support tube (2) = layer height - thickness of the structural layer itself + five millimeters.

7. The construction method of independent support of post-cast strip according to claim 1 is characterized in that: A connecting piece (3) is extended in the support tube (2), and before the support tube (2) is installed, the connecting piece (3) is connected to the positioning piece (1).

8. The construction method of independent support of post-cast strip according to claim 1, characterized in that: In step 5, the concrete in the support pipe (2) is poured in layers, and the layered pouring height is ≤500 mm.

9. The construction method of independent support of post-cast strip according to claim 1, characterized in that: The inside of the support pipe (2) is poured with C20 fine stone concrete.

10. The construction method for independent support of post-cast strip according to any one of claims 1 to 9, characterized in that: In step eight, two weeks after the main structure (100) is capped, the concrete of the post-cast zone is poured.

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