A pre-embedded inflatable bag cast-in-place reinforced concrete hollow wall and a construction process thereof

Abstract

This disclosure relates to the field of construction, and more particularly to a pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall and its construction process. The hollow wall includes a wall formwork, a reinforcing mesh, an inflatable bladder, horizontal tie bars, a second reinforcing mesh, another wall formwork, and a concrete cover. The horizontal tie bars are configured to connect with the first and second reinforcing meshes. The concrete cover is poured to fill the area between the first and second wall formworks. The inflatable bladder has a bonding area and multiple air chambers. The multiple air chambers are connected by the bonding area to form a whole. Multiple vertical through holes are formed within the bonding area. The horizontal tie bars pass through the through holes. The inflatable bladder also includes multiple positioning rods. The positioning rods protrude vertically from the plane of the inflatable bladder. The first end of the positioning rod is connected to the center of the air chamber, and the second end of the positioning rod can abut against the first or second wall formwork. The positioning rods have fixing holes. The positioning rods are tied and fixed to the first or second reinforcing mesh through the fixing holes.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of building engineering, and in particular to a pre-embedded inflatable bag cast-in-place reinforced concrete hollow wall and a construction process thereof. BACKGROUND

[0002] The filler wall in building engineering is generally built by bricks, blocks, and boards. Brick filler walls have been gradually eliminated because sintered bricks are not conducive to green environmental protection and the construction efficiency is low. Block and board filler walls have low strength and are prone to cracking, and are generally used for interior partition walls. When used for exterior walls, they are prone to cracking, water leakage, and shedding of the outer thermal insulation layer.

[0003] To avoid the quality problems such as cracking, water leakage, and shedding of the outer thermal insulation layer of block and board filler walls, many building exterior walls have begun to use cast-in-place concrete walls in recent years. Cast-in-place concrete walls have high strength, are conducive to fixing the outer thermal insulation layer, and can prevent the outer thermal insulation layer from falling off. At the same time, cast-in-place concrete walls also have good overall performance and cracking resistance, which can prevent the exterior wall from cracking and leaking. However, cast-in-place concrete walls have large rigidity, which changes the rigidity size and rigidity distribution of the main structure and has an adverse effect on the seismic resistance of the main structure. At the same time, the self-weight of the cast-in-place concrete wall is large, which increases the load and seismic action of the main structure. Therefore, in order to reduce the influence of the large rigidity of the filler wall on the main structure and to reduce the self-weight of the wall and increase the self-insulation performance of the wall, cast-in-place concrete filler walls generally adopt the structure of hollow walls or sandwich walls.

[0004] At present, the implementation method of cast-in-place concrete hollow walls is generally to pre-embed PVC pipes in the middle of the wall, and the implementation method of cast-in-place concrete sandwich walls is generally to pre-embed lightweight thermal insulation boards in the middle of the wall. The core-pulling method of pre-embedding PVC pipes in hollow walls has a low core-pulling rate, the weight-reducing effect is not obvious, and the PVC pipes are difficult to fix, the ends need to be blocked, and the PVC pipes are easy to shift during pouring of the concrete, which affects the quality of the wall. The method of pre-embedding lightweight thermal insulation boards in sandwich walls is difficult to fix due to the low strength and difficulty of the lightweight thermal insulation boards, and the pre-embedded lightweight thermal insulation boards are easy to shift during pouring of the concrete, which results in insufficient thickness of the concrete protective layer of the thermal insulation boards and affects the quality of the wall. Moreover, the transverse tie steel bars of the lightweight thermal insulation boards are easy to conflict with the steel bars in the cast-in-place concrete wall, which makes it difficult to bind the steel bars.

[0005] In summary, the pre-embedding of PVC pipes and lightweight thermal insulation boards in the construction of cast-in-place concrete hollow walls is difficult to fix, affects the binding of the steel bars, the pre-embedded pipes and boards are easy to shift during pouring of the concrete, which affects the quality of the hollow wall and easily causes engineering quality accidents and engineering safety accidents. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] Traditional methods of embedding PVC pipes or lightweight insulation boards in cast-in-place hollow concrete walls present challenges such as difficulty in fixing the embedded core-pulling components, low core-pulling rate, and easy displacement during concrete pouring, which affect the quality of the hollow wall and the binding of the embedded core-pulling components.

[0008] Technical solution:

[0009] On one hand, a pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall is provided, comprising a wall formwork, a steel mesh, an inflatable bladder, multiple horizontal tie bars, a steel mesh, a wall formwork, and a concrete cover. The wall formwork, steel mesh, inflatable bladder, steel mesh, and wall formwork are sequentially arranged along the thickness direction of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall. The multiple horizontal tie bars are configured to connect with the steel mesh and steel mesh to form an integral steel cage. The inflatable bladder is filled with gas. The concrete cover is poured and filled in the area between the wall formwork, steel mesh, inflatable bladder, multiple horizontal tie bars, steel mesh, and wall formwork. The inflatable bladder is parallel to the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall. The inflatable bladder forms an adhesive area and multiple air chambers. The multiple air chambers are connected by the adhesive area. The bonding area is connected to form a whole; multiple air chambers are interconnected; multiple through holes are formed in the bonding area, perpendicularly penetrating the bonding area; the through holes are positioned corresponding to the horizontal tie bars; the horizontal tie bars pass through the through holes; the inflatable bladder also includes multiple positioning rods; the positioning rods protrude vertically from the plane of the inflatable bladder; the positioning rods are positioned one-to-one with the air chambers; the first end of the positioning rod is connected to the center of the air chamber, and the second end of the positioning rod is configured to abut against the first or second wall template after the inflatable bladder is fully inflated, thereby ensuring that the inflatable bladder is located in the middle position between the first and second wall templates; the positioning rods have fixing holes; the fixing holes are positioned corresponding to the first or second steel mesh, so that the positioning rods can be tied and fixed to the first or second steel mesh through the fixing holes.

[0010] In some embodiments, the pre-embedded inflatable airbag cast-in-place reinforced concrete hollow wall further includes binding straps; the binding straps are configured to pass through the fixing holes to bind and fix the positioning rod to the first reinforcing mesh or the second reinforcing mesh.

[0011] In some embodiments, the binding strap is made of wire.

[0012] In some embodiments, a preset distance is maintained between the through hole and each of the adjacent plurality of air chambers.

[0013] In some embodiments, the bonding area is further formed with a plurality of connecting vents; the connecting vents are located in the plane of the bonding area; the connecting vents are configured to connect two adjacent air chambers to each other.

[0014] In some embodiments, the plurality of air chambers are identical in size and shape and are arranged in a matrix.

[0015] In some embodiments, the spacing between the through hole and the adjacent plurality of air chambers is equal.

[0016] In some embodiments, the inflatable bladder further includes an inflation nozzle; the inflation nozzle communicates with one of the air chambers; the inflation nozzle includes a one-way valve and a sealing cap; the one-way valve is configured to allow gas to flow unidirectionally from the inlet of the inflation nozzle to a plurality of the air chambers inside the inflatable bladder; the sealing cap is configured to seal the inlet of the inflation nozzle.

[0017] In some embodiments, the positioning rod is cylindrical; the second end of the positioning rod is spherical; the positioning rod further includes a base; and the first end of the positioning rod is connected to the air chamber through the base.

[0018] In some embodiments, the base is disc-shaped.

[0019] In some embodiments, the positioning rod is made of plastic.

[0020] In some embodiments, the positioning rod is made of nylon.

[0021] In some embodiments, the pre-embedded inflatable airbag cast-in-place reinforced concrete hollow wall further includes a concrete protective layer pad one and a concrete protective layer pad two; the concrete protective layer pad one is tied and fixed to the side of the steel mesh one near the wall formwork one; the concrete protective layer pad two is tied and fixed to the side of the steel mesh two near the wall formwork two.

[0022] On the other hand, the construction process for the aforementioned pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall includes the following steps:

[0023] (1) Fabricate the inflatable bladder;

[0024] (2) Fabricate the first steel mesh and the second steel mesh;

[0025] (3) Place the uninflated airbag between the first and second steel meshes; then inflate the airbag until it can stand upright; subsequently, pass the horizontal tie bars through the multiple through holes of the airbag and tie the two ends of the horizontal tie bars to the first and second steel meshes respectively to form the integral steel cage.

[0026] (4) The positioning rods on both sides of the airbag are tied and fixed to the first steel mesh and the second steel mesh respectively through the fixing holes on the positioning rods on both sides of the airbag;

[0027] (5) Support the wall template one and the wall template two so that the wall template one, the steel mesh one, the air bladder, the steel mesh two and the wall template two are arranged sequentially along the thickness direction of the pre-embedded air bladder cast-in-place reinforced concrete hollow wall;

[0028] (6) Continue to inflate the airbag until the second ends of the positioning rods on both sides of the airbag can abut against the first wall template and the second wall template respectively, thereby ensuring that the airbag is located in the middle position between the first wall template and the second wall template, and then stop inflating.

[0029] (7) Pour concrete in the area between the wall formwork one, the steel mesh one, the air bladder, the multiple horizontal tie bars, the steel mesh two and the wall formwork two, and vibrate to compact it;

[0030] (8) Curing the concrete until it reaches the design strength to form the concrete protective layer;

[0031] (9) After step (8), remove the first wall template and the second wall template to obtain a pre-embedded airbag cast-in-place reinforced concrete hollow wall.

[0032] In some embodiments, step (1) includes: using an airtight material as raw material, cutting and bonding it to make the inflatable bag.

[0033] In some embodiments, the airtight material includes at least one of rubber, plastic, and fiber cloth.

[0034] In some embodiments, the size of the inflatable bladder is determined based on the size of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall.

[0035] In some embodiments, between steps (4) and (5), the following steps are also included: (a) binding and fixing the first concrete protective layer spacer to the side of the first steel reinforcement mesh near the first wall formwork; binding and fixing the second concrete protective layer spacer to the side of the second steel reinforcement mesh near the second wall formwork.

[0036] Beneficial effects:

[0037] 1. This invention, during the construction of cast-in-place concrete walls, achieves the effect of core extraction within the cast-in-place concrete wall by pre-embedding inflatable bladders between wall formwork one and wall formwork two, and inflating the bladders before pouring concrete. The inflatable bladders are for single use only and are not removed after concrete pouring. Each air chamber on the inflatable bladder has outwardly protruding positioning rods connected to the middle of both sides. The positioning rods are perpendicular to the wall surface. After the inflatable bladder is inflated, the positioning rods gradually move outward. When the second end of the positioning rod abuts against wall formwork one or wall formwork two, the inflatable bladder is fully inflated, thus ensuring that the inflatable bladder is positioned between wall formwork one and wall formwork two. Fixing holes are provided on the positioning rods. Therefore, when installing the inflatable bladder, simply insert the binding straps through the fixing holes on the positioning rod and tie the positioning rod to the surrounding steel mesh to fix the position of the inflatable bladder. This prevents the inflatable bladder from shifting left or right or up or down during concrete pouring, thus achieving accurate positioning and fixation of the inflatable bladder. This also prevents the inflatable bladder from shifting forward or backward during subsequent concrete pouring. Setting up the positioning rod ensures the accurate positioning of the inflatable bladder within the pre-embedded inflatable bladder in the cast-in-place reinforced concrete hollow wall, guaranteeing the construction quality of the hollow wall.

[0038] 2. This invention features multiple through holes pre-drilled in the bonding area of ​​the inflatable bladder, allowing horizontal tie bars between the steel meshes on both sides of the hollow concrete wall to pass through. The multiple through holes in the inflatable bladder address the issue of horizontal tie bars passing through the steel meshes on both sides of the wall, without affecting the arrangement and binding of the steel reinforcement within the wall.

[0039] 3. The advantages of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall of the present invention include:

[0040] (1) By pre-embedding air bladders to form hollow wall panels, the self-weight of concrete walls can be reduced, the self-insulation effect of the walls can be improved, and the traditional sandwich composite insulation wall panels can be replaced.

[0041] (2) The airbag is equipped with a positioning rod, which makes the airbag accurately positioned and less likely to shift during concrete pouring, resulting in a high-quality hollow concrete wall.

[0042] (3) The airbag is arranged with through holes, which does not affect the arrangement of horizontal tie bars in the concrete wall.

[0043] (4) The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall of the present invention can also be used for the production of precast concrete wall panels. The construction process of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall of the present invention is suitable for industrialized and standardized production of precast hollow wall panels.

[0044] (5) This invention solves the technical problems of traditional pre-embedded PVC pipes or pre-embedded lightweight insulation boards in cast-in-place concrete hollow walls, such as difficulty in fixing the pre-embedded core pullers, low core puller rate, easy displacement during concrete pouring, affecting the quality of hollow walls, and the impact of pre-embedded core pullers on steel reinforcement binding.

[0045] (6) This invention provides a cast-in-place hollow concrete wall structure with high core extraction rate, reliable quality, simple and easy construction, and low cost. It provides a precise, reliable, simple and efficient construction method for cast-in-place hollow concrete walls and a low-cost, high-quality core extraction solution for cast-in-place hollow concrete walls.

[0046] (7) The present invention can ensure that the cast-in-place concrete hollow wall has a high core extraction rate, so as to reduce the self-weight of the wall, reduce the stiffness, and increase the self-insulation function.

[0047] (8) The embedded core puller of the present invention is inexpensive, simple to manufacture, and convenient and quick to install; the embedded core puller of the present invention is firmly fixed in the concrete wall and accurately positioned, and is not easy to move when pouring concrete; the embedded core puller of the present invention does not affect the arrangement and binding of the steel bars in the wall.

[0048] (9) The present invention can improve the construction quality of cast-in-place hollow concrete walls, reduce construction difficulty, and save construction costs. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly introduced below. However, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. Furthermore, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc., involved in the embodiments of this disclosure.

[0050] Figure 1 An elevation view of a cast-in-place reinforced concrete hollow wall with pre-embedded inflatable bladders according to some embodiments;

[0051] Figure 2 for Figure 1 AA section diagram of the cast-in-place reinforced concrete hollow wall with pre-embedded inflatable airbags;

[0052] Figure 3 for Figure 1 BB section diagram of the cast-in-place reinforced concrete hollow wall with pre-embedded inflatable airbags;

[0053] Figure 4 An exploded view of an air inlet in a cast-in-place reinforced concrete hollow wall with an embedded air bladder, according to some embodiments.

[0054] Figure 5 This is a structural diagram of a positioning rod in a cast-in-place reinforced concrete hollow wall with a pre-embedded inflatable bladder, according to some embodiments. Detailed Implementation

[0055] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0056] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0057] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0058] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. The term "coupled" indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communication coupling" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0059] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0060] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0061] As used herein, depending on the context, the term “if” may optionally be interpreted as meaning “when”, “in the event of”, “in response to determination”, or “in response to detection”. Similarly, depending on the context, the phrase “if it is determined that…” or “if [the stated condition or event] is detected” may optionally be interpreted as meaning “in the event of determination that…”, “in response to determination that…”, “when [the stated condition or event] is detected”, or “in response to the detection of [the stated condition or event]”.

[0062] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0063] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0064] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0065] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0066] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched regions shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0067] In some embodiments, a pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall is provided, such as... Figures 1 to 5 As shown, it includes wall formwork 1a, reinforcing mesh 2a, inflatable bladder 3, multiple horizontal tie bars 4, reinforcing mesh 2b, wall formwork 2b, and concrete cover 5; wall formwork 1a, reinforcing mesh 2a, inflatable bladder 3, reinforcing mesh 2b, and wall formwork 2b are arranged sequentially along the thickness direction of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall; multiple horizontal tie bars 4 are configured to connect with reinforcing mesh 2a and reinforcing mesh 2b to form an integral reinforcing cage; inflatable bladder The interior of the air-filled wall is filled with gas; the concrete protective layer 5 is poured and filled in the area between the wall formwork 1a, the steel mesh 2a, the air-filled airbag 3, multiple horizontal tie bars 4, the steel mesh 2b, and the wall formwork 1b; the air-filled airbag 3 is parallel to the pre-embedded airbag cast-in-place reinforced concrete hollow wall; the air-filled airbag 3 forms a bonding area 31 and multiple air chambers 32; the multiple air chambers 32 are connected to each other through the bonding area 31 to form a whole; the multiple air chambers 32 are interconnected; multiple vertical... A through hole 310 is provided through the bonding area; the through hole 310 is positioned corresponding to the horizontal tie bar 4; the horizontal tie bar 4 passes through the through hole 310; the inflatable bladder 3 also includes multiple positioning rods 33; the positioning rods 33 protrude vertically from the plane of the inflatable bladder 3 (i.e., the extension direction of the positioning rods 33 is perpendicular to the wall surface); the positioning rods 33 are positioned one-to-one with the air chambers 32; the first end of the positioning rod 33 is connected to the center of the air chamber 32, and the second end of the positioning rod 33 is configured to abut against the wall template 1a or the wall template 2b after the inflatable bladder 3 is fully inflated, thereby ensuring that the inflatable bladder 3 is located in the middle position between the wall template 1a and the wall template 2b. The thickness of the concrete protective layer in the corresponding area can be adjusted by setting the length of the positioning rod 33; the positioning rod 33 is provided with a fixing hole 330; the fixing hole 330 is positioned corresponding to the steel mesh 2a or the steel mesh 2b, so that the positioning rod 33 can be tied and fixed to the steel mesh 2a or the steel mesh 2b through the fixing hole 330.

[0068] In some embodiments, the construction process for the aforementioned pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall is provided, referring to... Figures 1 to 5 The process mainly consists of three steps: 1. Fabrication of the inflatable bladder; 2. Installation of the reinforcing cage, inflatable bladder, wall formwork, etc.; 3. Pouring concrete, concrete curing, and formwork removal, specifically including the following steps:

[0069] (1) Make the airbag 3;

[0070] (2) Fabricate steel mesh 2a and steel mesh 2b; ensure that steel mesh 2a and steel mesh 2b are reliably connected to the steel bars of the lower wall;

[0071] (3) Place the uninflated airbag 3 between the steel mesh 1 2a and the steel mesh 2b; then inflate the airbag 3 to give it a preliminary shape until it can stand up on its own; then, pass horizontal tie bars 4 through the multiple through holes 310 of the airbag 3, and tie the two ends of the horizontal tie bars 4 to the steel mesh 1 2a and the steel mesh 2b respectively to form an integral steel cage.

[0072] (4) The positioning rods 33 on both sides of the airbag 3 are tied and fixed to the steel mesh 2a and the steel mesh 2b respectively through the fixing holes 330 on the positioning rods 33 on both sides of the airbag 3; Specifically, the binding tape is inserted into the fixing holes 330 on the positioning rods 33 to tie and fix the positioning rods 33 to the steel mesh 2a or the steel mesh 2b.

[0073] (5) Check and adjust the position of the airbag 3. After confirming that it is correct, set up the wall template 1a and the wall template 2b so that the wall template 1a, the steel mesh 1a, the airbag 3, the steel mesh 2b and the wall template 2b are set up in sequence along the thickness direction of the pre-embedded airbag cast-in-place reinforced concrete hollow wall.

[0074] (6) Continue to inflate the airbag 3 until the second ends of the positioning rods 33 on both sides of the airbag 3 can abut against the wall template 1a and the wall template 2b respectively, thereby ensuring that the airbag 3 is located in the middle position of the wall template 1a and the wall template 2b, and then stop inflating.

[0075] (7) Pour concrete in the area between wall formwork 1a, steel mesh 2a, airbag 3, multiple horizontal tie bars 4, steel mesh 2b and wall formwork 2b, and vibrate to compact it;

[0076] (8) The concrete is cured until it reaches the design strength, forming a concrete protective layer 5;

[0077] (9) After step (8), remove wall template 1a and wall template 2b to obtain a pre-embedded airbag cast-in-place reinforced concrete hollow wall.

[0078] In the aforementioned embodiments, during the construction of the cast-in-place concrete wall, an inflatable bladder 3 is pre-embedded between the wall formwork 1a and the wall formwork 1b, and the inflatable bladder 3 is inflated before pouring concrete to achieve the effect of removing the core from the cast-in-place concrete wall. In this invention, the inflatable bladder 3 is for single use and is not removed after the concrete is poured. The inflatable bladder 3 has multiple outwardly protruding positioning rods 33 on both sides. Specifically, each air chamber 32 on the inflatable bladder 3 has an outwardly protruding positioning rod 33 connected to the middle of both sides. The positioning rod 33 is perpendicular to the wall surface. After the airbag 3 is inflated, the positioning rod 33 gradually moves outward. When the second end of the positioning rod 33 abuts against the wall template 1a or wall template 2b, the airbag 3 is fully inflated. This ensures that the airbag 3 is positioned between the wall template 1a and wall template 2b, achieving accurate positioning and fixation of the airbag 3. This prevents the airbag 3 from shifting forward or backward during subsequent concrete pouring. The positioning rod 33 has a fixing hole 330. Therefore, when installing the airbag 3, simply insert a binding strap (such as wire) into the fixing hole 330 on the positioning rod 33 and bind the positioning rod 33 to the surrounding steel mesh (steel mesh 2a or steel mesh 2b) to fix the position of the airbag 3 and prevent the airbag from shifting left or right or up or down during concrete pouring. The positioning rod 33 ensures the accurate positioning of the inflatable bladder 3 within the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall, guaranteeing the construction quality of the hollow wall. Multiple through holes 310 are pre-drilled in the bonding area 31 of the inflatable bladder 3, allowing the horizontal tie bars 4 between the two reinforcing meshes (i.e., reinforcing mesh 1 2a and reinforcing mesh 2b) within the hollow concrete wall to pass through. This invention pre-drills multiple through holes 310 in the inflatable bladder 3, addressing the issue of the horizontal tie bars 4 between the two reinforcing meshes within the wall, without affecting the arrangement and binding of the reinforcing bars within the wall.

[0079] The advantages of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall of the present invention include: by pre-embedding inflatable bladders 3 to form hollow wall panels, the self-weight of the concrete wall can be reduced, the self-insulation effect of the wall can be improved, and it can replace the traditional sandwich composite insulation wall panels. The inflatable bladder 3 is equipped with a positioning rod 33, which ensures accurate positioning of the inflatable bladder 3, making it less prone to displacement during concrete pouring, resulting in a high-quality finished hollow concrete wall. Through holes 310 are arranged on the inflatable bladder 3, which does not affect the arrangement of the horizontal tie bars 4 inside the concrete wall. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall of the present invention can also be used for the production of precast concrete wall panels. The construction process of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall of the present invention is suitable for industrialized and standardized production of precast hollow wall panels. The present invention solves the technical problems of difficulty in fixing the pre-embedded core-pulling parts, low core-pulling rate, easy displacement during concrete pouring, and impact on the quality of the hollow wall, as well as the technical problems of the pre-embedded core-pulling parts affecting the reinforcement binding, which are inherent in traditional pre-embedded PVC pipes or pre-embedded lightweight insulation boards in cast-in-place concrete hollow walls.

[0080] This invention provides a cast-in-place hollow concrete wall structure with high core extraction rate, reliable quality, simple and easy construction, and low cost. It offers a precise, reliable, simple, and efficient construction method for cast-in-place hollow concrete walls, providing a low-cost, high-quality core extraction solution. This invention ensures a high core extraction rate in the cast-in-place hollow concrete wall, thereby reducing the wall's self-weight, stiffness, and increasing its self-insulating function. The pre-embedded core extraction components are inexpensive, simple to manufacture, and convenient and quick to install. These components are firmly fixed within the concrete wall, accurately positioned, and unlikely to shift during concrete pouring. They do not affect the arrangement and binding of the reinforcing steel bars within the wall. This invention improves the construction quality of cast-in-place hollow concrete walls, reduces construction difficulty, and saves construction costs.

[0081] In some embodiments, such as Figure 2 As shown, the pre-embedded inflatable airbag cast-in-place reinforced concrete hollow wall also includes binding straps; the binding straps are configured to pass through the fixing holes 330 to bind and fix the positioning rod 33 to the steel mesh 2a or the steel mesh 2b.

[0082] In some embodiments, the cable ties are made of wire.

[0083] In some embodiments, such as Figure 1 As shown, the through hole 310 and the adjacent multiple air chambers 32 maintain a preset distance.

[0084] In some embodiments, such as Figures 1 to 3 As shown, the bonding area 31 also has multiple connecting vents 311; the connecting vents 311 are located in the plane of the bonding area 31; the connecting vents 311 are configured to connect two adjacent air chambers 32 to each other. Therefore, on the one hand, the number of required air nozzles can be reduced, facilitating construction; on the other hand, the connecting vents 311 enable two adjacent air chambers 32 to be interconnected, ensuring equal air pressure in each air chamber 32, thereby better guaranteeing the comprehensive mechanical performance of the wall structure.

[0085] In some embodiments, such as Figures 1 to 3 As shown, the multiple air chambers 32 are the same size and shape, and are arranged in a matrix. Furthermore, the air chambers 32 are aligned horizontally and vertically.

[0086] In some embodiments, such as Figure 1 As shown, the spacing between the through hole 310 and the adjacent multiple air chambers 32 is equal.

[0087] In some embodiments, such as Figure 1 , Figure 2 and Figure 4As shown, the inflatable bladder 3 also includes an inflation nozzle 34; the inflation nozzle 34 is connected to an air chamber 32; the inflation nozzle 34 includes a one-way valve 341 and a sealing cap 342; the one-way valve 341 is configured to allow gas to flow unidirectionally from the inlet 34r of the inflation nozzle 34 to the multiple air chambers 32 inside the inflatable bladder 3, and not to flow in the reverse direction, thereby ensuring that the inflatable bladder 3 does not leak air when inflated; the sealing cap 342 is configured to seal the inlet 34r of the inflation nozzle 34 after the inflatable bladder 3 is fully inflated.

[0088] In some embodiments, such as Figure 1 and Figure 2 As shown, the inflation nozzle 34 is located on the top of the inflation bag 3.

[0089] In some embodiments, such as Figure 2 and Figure 5 As shown, the positioning rod 33 is cylindrical; the second end 332 of the positioning rod 33 is spherical; the positioning rod 33 also includes a base 331; the first end of the positioning rod 33 is connected to the air chamber 32 through the base 331 (for example, by adhesive bonding).

[0090] In some embodiments, such as Figure 5 As shown, the base 331 is disc-shaped.

[0091] In some embodiments, the positioning rod 33 is made of plastic.

[0092] In some embodiments, the positioning rod 33 is made of nylon.

[0093] In some embodiments, the airbag 3 is made of two pieces of airtight material that are cut and bonded together. The two pieces of airtight material are identical in shape and size. The two pieces of airtight material are bonded together in the bonding area 31, dividing the airbag 3 into multiple air chambers 32. The air chambers 32 are aligned longitudinally and laterally, are of the same size, and are distributed in a matrix. The air chambers 32 are connected by connecting air holes 311. An inflation nozzle 34 is arranged at the top of the airbag 3. A positioning rod 33 protruding outward is fixed in the middle of each air chamber 32 of the airbag 3. Multiple through holes 310 are arranged in the bonding area 31 between the air chambers 32 of the airbag 3. The positions of the through holes 310 correspond to the positions of the horizontal tie bars 4 between the steel meshes (i.e., steel mesh 2a and steel mesh 2b) on both sides of the pre-embedded airbag cast-in-place reinforced concrete hollow wall. When the airbag 3 is cut into sheets, the through holes 310 are reserved at the positions corresponding to the horizontal tie bars 4. The pre-embedded core-pulling component of the present invention is an inflatable bladder 3, which has a low manufacturing cost.

[0094] In some embodiments, the airtight material includes at least one of rubber, plastic, and fiber cloth.

[0095] In some embodiments, the two airtight materials used for the airbag 3 should be cut and prepared according to the size of the cast-in-place concrete wall used, taking into account the shape changes of the airbag 3 before and after inflation.

[0096] In some embodiments, two pieces of airtight material that have been pre-cut are bonded together in the bonding area 31 by hot melt bonding or adhesive bonding to form an airbag 3 (e.g. Figure 1 (As shown).

[0097] In some embodiments, an inflation nozzle 34 is installed on the top of the airbag 3, and a one-way valve 341 is installed at the bottom of the inflation nozzle 34. Gas can only flow from the outside into the airbag 3 and cannot flow in the reverse direction, thereby preventing air leakage when the airbag 3 is inflated. A sealing cap 342 is provided on the top of the inflation nozzle 34, which can be used to seal the inlet 34r of the inflation nozzle 34 after inflation.

[0098] In some embodiments, the size of the airbag 3 is determined based on the size of the pre-embedded airbag cast-in-place reinforced concrete hollow wall.

[0099] In some embodiments, such as Figure 2 As shown, the pre-embedded inflatable airbag cast-in-place reinforced concrete hollow wall also includes concrete protective layer spacer one and concrete protective layer spacer two; concrete protective layer spacer one is tied and fixed to the side of the steel mesh 2a near the wall formwork 1a; concrete protective layer spacer two is tied and fixed to the side of the steel mesh 2b near the wall formwork 2b.

[0100] In some embodiments, refer to Figures 1 to 5 Between steps (4) and (5), the following steps are also included: (a) binding and fixing concrete cover block one to the side of reinforcing mesh one 2a near wall formwork one 1a; binding and fixing concrete cover block two to the side of reinforcing mesh two 2b near wall formwork two 1b. Thus, the thickness of the concrete cover 5 of the reinforcing mesh (i.e., reinforcing mesh one 2a and reinforcing mesh two 2b) can be controlled.

[0101] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0102] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A cast-in-place reinforced concrete hollow wall with pre-embedded inflatable bladders, characterized in that, The structure includes a wall formwork, a reinforcing mesh, an inflatable bladder, multiple horizontal tie bars, a second reinforcing mesh, another wall formwork, and a concrete cover. The wall formwork, reinforcing mesh, inflatable bladder, second reinforcing mesh, and second wall formwork are sequentially arranged along the thickness direction of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall. The multiple horizontal tie bars are configured to connect with the first and second reinforcing meshes to form an integral reinforcing cage. The inflatable bladder is filled with gas. The concrete cover is poured and filled in the area between the wall formwork, reinforcing mesh, inflatable bladder, multiple horizontal tie bars, second reinforcing mesh, and second wall formwork. The inflatable bladder is parallel to the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall; the inflatable bladder forms a bonding area and multiple air chambers; the multiple air chambers are connected to each other through the bonding area to form a whole; the multiple air chambers are interconnected; multiple through holes are formed in the bonding area, perpendicularly penetrating the bonding area; the through holes are corresponding to the positions of the horizontal tie bars; the horizontal tie bars pass through the through holes; the inflatable bladder also includes multiple positioning rods; the positioning rods protrude vertically from the plane of the inflatable bladder; the positioning rods are corresponding to the air chambers one by one; the first end of the positioning rod is connected to the center of the air chamber, and the second end of the positioning rod is configured to abut against the first wall template and the second wall template after the inflatable bladder is fully inflated, thereby ensuring that the inflatable bladder is located in the middle position of the first wall template and the second wall template; the positioning rod has a fixing hole; the fixing hole is corresponding to the position of the first or second steel mesh, so as to bind and fix the positioning rod to the first or second steel mesh through the fixing hole.

2. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 1, characterized in that, It also includes binding straps; the binding straps are configured to pass through the fixing holes to bind and fix the positioning rod to the first reinforcing mesh or the second reinforcing mesh.

3. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 1, characterized in that, The bonding area also has a plurality of connecting vents; the connecting vents are located in the plane of the bonding area; the connecting vents are configured to connect two adjacent air chambers to each other.

4. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 1, characterized in that, The multiple air chambers are the same size and shape and are arranged in a matrix.

5. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 4, characterized in that, The distance between the through hole and the adjacent plurality of air chambers is equal.

6. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 1, characterized in that, The inflatable bladder also includes an inflation nozzle; the inflation nozzle communicates with one of the air chambers; the inflation nozzle includes a one-way valve and a sealing cap; the one-way valve is configured to allow gas to flow unidirectionally from the inlet of the inflation nozzle to the plurality of air chambers inside the inflatable bladder; the sealing cap is configured to seal the inlet of the inflation nozzle.

7. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 1, characterized in that, The positioning rod is cylindrical; the second end of the positioning rod is spherical; the positioning rod also includes a base; the first end of the positioning rod is connected to the air chamber through the base.

8. The pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 1, characterized in that, It also includes concrete protective layer spacer one and concrete protective layer spacer two; the concrete protective layer spacer one is tied and fixed to the side of the steel mesh one that is close to the wall formwork one; the concrete protective layer spacer two is tied and fixed to the side of the steel mesh two that is close to the wall formwork two.

9. The construction process of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to any one of claims 1 to 8, characterized in that, Includes the following steps: (1) Fabricate the inflatable bladder; (2) Fabricate the first and second steel meshes; (3) Place the uninflated airbag between the first and second steel meshes; then inflate the airbag until it can stand upright; subsequently, pass the horizontal tie bars through the multiple through holes of the airbag and tie the two ends of the horizontal tie bars to the first and second steel meshes respectively to form the integral steel cage. (4) The positioning rods on both sides of the airbag are tied and fixed to the first steel mesh and the second steel mesh respectively through the fixing holes on the positioning rods on both sides of the airbag; (5) Support the wall template one and the wall template two so that the wall template one, the steel mesh one, the air bladder, the steel mesh two and the wall template two are arranged sequentially along the thickness direction of the pre-embedded air bladder cast-in-place reinforced concrete hollow wall; (6) Continue to inflate the airbag until the second ends of the positioning rods on both sides of the airbag can abut against the first wall template and the second wall template respectively, thereby ensuring that the airbag is located in the middle position between the first wall template and the second wall template, and then stop inflating. (7) Pour concrete in the area between the wall formwork one, the steel mesh one, the air bladder, the multiple horizontal tie bars, the steel mesh two and the wall formwork two, and vibrate to compact it; (8) Curing the concrete until it reaches the design strength to form the concrete protective layer; (9) After step (8), remove the first wall template and the second wall template to obtain a pre-embedded airbag cast-in-place reinforced concrete hollow wall.

10. The construction process of the pre-embedded inflatable bladder cast-in-place reinforced concrete hollow wall according to claim 9, characterized in that, Between step (4) and step (5), the following steps are also included: (a) Tie and fix the concrete protective layer spacer one to the side of the steel mesh one that is close to the wall formwork one; tie and fix the concrete protective layer spacer two to the side of the steel mesh two that is close to the wall formwork two.

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