A formwork-free construction technology for irregular curved shear walls

Abstract

This invention relates to a formwork-free construction process for irregular arc-shaped shear walls, comprising: Step 1, wall reinforcement binding: positioning and marking out the irregular arc-shaped shear wall, followed by reinforcement binding to form a reinforcement cage wall; Step 2, wall pouring: filling the reinforcement cage wall with prepared grout at a preset speed; Step 3, wall finishing: after pouring, finishing the wall surface promptly according to the hardening degree of the grout; Step 4, wall inspection and maintenance: after finishing the wall surface, inspecting for any obvious unevenness, grinding and repairing it, and then performing maintenance. After the reinforcement of the irregularly shaped wall is bound and fixed, the prepared grout is filled into the wall, and skilled workers finish the walls on both sides, eliminating the need for formwork erection. This method is safe, practical, efficient, and produces a simple and aesthetically pleasing overall effect, saving costs and construction time, while ensuring controllable construction quality.

Description

Technical Field

[0001] This invention relates to the field of shear wall construction technology, and in particular to a formwork-free construction process for irregular arc-shaped shear walls. Background Technology

[0002] Shear walls, also known as wind-resistant walls, earthquake-resistant walls, or structural walls, are walls in buildings or structures that primarily bear horizontal and vertical loads (gravity) caused by wind or earthquakes, preventing structural shear failure. They are generally made of reinforced concrete. Shear wall construction typically uses reinforced bolt formwork for casting, a simple method. However, this method presents many difficulties for irregularly shaped shear walls, such as irregular curved shear walls, where matching formwork is challenging, making formwork erection difficult and potentially affecting construction results. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a formwork-free construction process for irregular arc-shaped shear walls, comprising:

[0004] Step 1: Reinforcing steel binding of the wall. Position and mark the irregular arc-shaped shear wall, and then bind the reinforcing steel to form a reinforcing steel cage wall.

[0005] Step 2: Wall pouring. The prepared grout is filled into the steel cage wall at a preset speed.

[0006] Step 3: Wall finishing. After the wall is poured, finish the surface in a timely manner according to the hardening degree of the grout.

[0007] Step 4: Wall inspection and maintenance. After the wall finish is completed, check the wall for any obvious bumps or dents, and grind and repair them, and then perform maintenance treatment.

[0008] Furthermore, the method for tying the reinforcing bars in step one is as follows: the pre-embedded wall reinforcing bars are directly tied, or the wall is rebar installed and then lapped and tied.

[0009] Furthermore, in step two, each preset weight of the grouting material comprises the following components in parts by weight:

[0010] Cement, 100;

[0011] Water, 17;

[0012] Sika Z-HV powder, 0.7;

[0013] Sika NN Liquid, 1.0.

[0014] Furthermore, each preset weight is one tray, and the grouting material in each tray includes: cement, 100kg; water, 17kg; Sika Z-HV powder, 0.7kg; and Sika NN liquid, 1.0kg.

[0015] Furthermore, in step two, the mixing time for each preset weight of grout is greater than or equal to 5 minutes.

[0016] Furthermore, in step two, the viscosity of the grout is 45s-60s. The viscosity test is determined by the time required to drain 1000ml of grout through a standard 1000ml funnel.

[0017] Furthermore, the pouring time for each preset weight of the grout is less than or equal to 30 minutes.

[0018] Furthermore, during the pouring of the grout in step two, the viscosity of the grout is monitored in real time.

[0019] Furthermore, in step four, the wall inspection is carried out 12 hours after the surface is finished.

[0020] Furthermore, the grouting material is adjusted in real time according to the climate, temperature and other conditions of the construction site.

[0021] Furthermore, the maintenance treatment is a moistening treatment; the surface of the lightweight material is kept moist through the moistening treatment.

[0022] In summary, the beneficial technical effects of this invention are as follows: After the steel reinforcement of the irregular wall is tied and fixed, the specially prepared grout is filled into the interior of the wall using a grouting machine, and the surface is finished on both sides of the wall by skilled operators, eliminating the need for formwork erection. This method is safe, practical, efficient, and produces a simple and beautiful overall effect. This construction process eliminates the need for wall formwork system erection, saving costs and construction time, and ensuring controllable construction quality. Attached Figure Description

[0023] The above and other objects, features, and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0024] Figure 1 This is a schematic diagram of the construction process of the present invention. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] Reference Figure 1 The diagram illustrates a formwork-free construction process for an irregular arc-shaped shear wall, as disclosed in this invention. The process includes the following steps: Step 1: Reinforcement binding. The irregular arc-shaped shear wall is positioned and marked according to the design drawings, and then reinforcement is bound to form a reinforcement cage wall. Step 2: Wall pouring. The prepared grout is filled into the reinforcement cage wall at a preset speed. Step 3: Wall finishing. After wall pouring, the surface is finished promptly according to the hardening degree of the grout. Step 4: Wall inspection and maintenance. After finishing the wall surface, the wall is inspected for obvious unevenness, and it is ground and repaired, followed by maintenance.

[0027] Preferred embodiments of the present invention are as follows:

[0028] Step 1: Reinforcing steel tying. Based on the design drawings, locate and lay out the irregular curved shear wall, then tie the reinforcing steel to form a reinforcing cage wall. According to the design drawings, locate and lay out the curved wall. If the wall reinforcement is pre-embedded, it can be tied directly; if it is a post-installed wall, it needs to be spliced ​​after rebar installation. The tying of the wall reinforcement can be done manually and mechanically. The wall reinforcement is fixed using tying wire or spot welding to prevent displacement. Simultaneously, the team should adjust the grouting material according to the specific local climate and temperature conditions to ensure its appropriate consistency and prevent it from flowing.

[0029] Step Two: Wall Casting. The prepared grout is filled into the reinforced cage wall. The specially prepared grout is filled into the wall using a grouting machine. The mix proportions of this grout are as follows: The cement used for grouting should be 42.5 grade ordinary Portland cement, and the admixtures should be Sika Z-HV and Sika NN. Each batch of grout includes the following components:

[0030] Cement, 100kg;

[0031] Water, 17 liters;

[0032] Sika Z-HV, 0.7kg (powder);

[0033] Sika NN, 1.0 (liquid);

[0034] Each batch of grout should be mixed for no less than 5 minutes, ensuring uniform mixing. Each batch of grout must be poured within 30 minutes. After each batch of grout is mixed evenly, its viscosity must be tested. The viscosity should be controlled between 45s and 60s (specifically, the viscosity of the grout is determined by the time it takes for 1000ml of grout to drain through a standard 1000ml funnel). Two sets of 40*40*160 (mm) test blocks of grout should be prepared.

[0035] During the grouting process, the filling speed must be strictly controlled. If the grout is found to be flowing significantly, it must be stopped and the cause checked, such as whether the grout is mixed evenly or whether the amount of water used is excessive. By directly filling the grout into the steel cage cavity, the construction of the wall formwork system is eliminated, which saves costs and construction time, and the quality of the finished product is controllable.

[0036] Step 3: Wall finishing. After the wall is poured, the finishing should be carried out promptly according to the hardening degree of the grout. Technical workers should work together to finish the walls on both sides. The finishing process should follow the progress of the grouting to prevent the grout from becoming difficult to shape after its initial hardening.

[0037] Step 4: Wall Inspection and Maintenance. After the wall finishing is completed, check for any obvious unevenness or dents, and sand or repair them as needed, followed by maintenance. 12 hours after wall finishing, keep the wall surface moist for moist curing; check for any obvious unevenness or dents and repair them as needed, ensuring proper base treatment to prepare for subsequent finishing processes.

[0038] In summary, the beneficial technical effects of this invention are as follows: after the steel reinforcement of the irregular wall is tied and fixed, the specially prepared grout is filled into the interior of the wall using a grouting machine, and the surface is finished on both sides of the wall by skilled operators, eliminating the need for formwork erection. This method is safe, practical, efficient, and produces a simple and beautiful overall effect. This construction process eliminates the need for wall formwork system erection, saving costs and construction time, and ensuring controllable construction quality.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A formwork-free construction process for irregular arc-shaped shear walls, characterized in that, include: Step 1: Reinforcing steel binding of the wall. Position and mark the irregular arc-shaped shear wall, and then bind the reinforcing steel to form a reinforcing steel cage wall. Step 2: Wall pouring. The prepared grout is filled into the steel cage wall at a preset speed. Step 3: Wall finishing. After the wall is poured, finish the surface in a timely manner according to the hardening degree of the grout. Step 4: Wall inspection and maintenance. After the wall finish is completed, check the wall for any obvious bumps or dents, and grind and repair them, and then perform maintenance treatment. In step two, each preset weight of grouting material comprises the following components by weight: Cement, 100; Water, 17; Sika Z-HV powder, 0.7; Sika NN liquid, 1.0; In step two, the mixing time for each preset weight of grouting material is greater than or equal to 5 minutes. In step two, the viscosity of the grout is 45s-60s. The viscosity test is determined by the time required to drain 1000ml of grout through a standard 1000ml funnel. The pouring time for each preset weight of the grout is less than or equal to 30 minutes.

2. The formwork-free construction process for irregular arc-shaped shear walls according to claim 1, characterized in that, The method for tying the reinforcing bars in step one is as follows: the pre-embedded wall reinforcing bars are tied directly, or the wall is rebar installed and then lapped and tied.

3. The formwork-free construction process for irregular arc-shaped shear walls according to claim 1, characterized in that, In step two, the viscosity of the grout is monitored continuously during the pouring of the grout.

4. The formwork-free construction process for irregular arc-shaped shear walls according to claim 1, characterized in that, In step four, the wall is inspected and maintained 12 hours after the surface is finished.

5. The formwork-free construction process for irregular arc-shaped shear walls according to claim 1, characterized in that, The grouting material is adjusted in real time according to the climate, temperature and other conditions of the construction site.

6. The formwork-free construction process for irregular arc-shaped shear walls according to claim 4, characterized in that, The maintenance treatment is a moistening treatment; the surface of the lightweight body is kept moist through the moistening treatment.

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