Opposite-pull screw, unilateral formwork system and construction method of unilateral formwork system

Abstract

The invention relates to the technical field of lower room building construction, and discloses a split screw, a single-side formwork system and a construction method of the single-side formwork system. The opposite-pull screw comprises a rod body, the rod body is provided with a steel bar planting section, a fat groove section and an outer wall section which are sequentially arranged, the first end of the steel bar planting section is fixedly connected with a steel structure of the support pile, the second end of the steel bar planting section is fixedly connected with the first end of the fat groove section, and the second end of the fat groove section is detachably connected with the first end of the outer wall section; the water stopping structure is arranged on the fertilizer groove section in a sleeving mode, and the water stopping structure can expand when encountering water so as to seal the penetrating waterproof layer. The water stopping structure is arranged on the fertilizer groove section in a sleeving mode, the integrity of the waterproof layer at the key position is guaranteed through sealing of the fertilizer groove section, and therefore the reliability of the whole waterproof system is improved. When meeting water, the water stop structure can rapidly expand and tightly seal the penetrating waterproof layer, water permeation is effectively prevented, the water stop structure can provide reliable waterproof protection for a building, and the service life of the building is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of basement building construction, and in particular to a tensioning screw rod and a single-side formwork system and a construction method of the single-side formwork system. Background Art

[0002] With the development of the construction industry, the functionality and importance of basements have been greatly improved. Basements are no longer just places to store sundries. They can be turned into home theaters, study rooms, wine cellars, or gyms, etc. These uses must be based on a dry and leak-free environment. Without good waterproofing measures, expensive audio-visual equipment, precious books, and delicate fitness equipment may be damaged by water. Moreover, basements are located underground, surrounded by soil and groundwater. Soil moisture will produce osmotic pressure on its walls and ground, and groundwater level fluctuations also threaten the dry environment of the basement.

[0003] At present, in the construction of cast-in-place concrete on the exterior wall of the basement of a building, a whole through-the-wall screw is generally used to set up and support the formwork. This type of tension screw is widely used in engineering practice. However, this type of tension screw is only equipped with a water stop in the concrete filling area. However, due to the presence of perforations at the connection between the tension screw and the wall, the waterproof effect is poor and water seepage is prone to occur. Summary of the invention

[0004] In view of this, the present invention provides a tension screw rod to solve the problem of poor waterproof effect of the tension screw rod in the prior art.

[0005] In a first aspect, the present invention provides a tension screw rod, comprising:

[0006] The rod body comprises a reinforcing bar section, a fat trough section and an outer wall section which are arranged in sequence, wherein the first end of the reinforcing bar section is fixedly connected to the steel structure of the support pile, the second end of the reinforcing bar section is fixedly connected to the first end of the fat trough section, and the second end of the fat trough section is detachably connected to the first end of the outer wall section;

[0007] A water-stop structure is sleeved on the fertilizer trough section, and the water-stop structure can swell when encountering water to seal the penetrating waterproof layer.

[0008] Optionally, the water-stop structure includes an expansion water-stop ring sleeved on the fat trough section and a water-stop glue provided in a gap between the expansion water-stop ring and the fat trough section.

[0009] Optionally, the embedded reinforcement section is a steel bar.

[0010] Optionally, the first end of the anchor bar section is fixedly connected to the steel structure of the support pile by welding, and the second end of the anchor bar section is fixedly connected to the first end of the fertilizer trough section by welding.

[0011] Optionally, the second end of the manure trough section and the first end of the outer wall section are respectively provided with threads; and further comprising a threaded connector suitable for threading the second end of the manure trough section and the first end of the outer wall section.

[0012] Optionally, it also includes:

[0013] A water stop plate is sleeved on the manure trough section and / or the outer wall section.

[0014] Beneficial Effects

[0015] In an optional embodiment, the tensioning screw includes a rod body, which has a reinforcing bar section, a fat trough section and an outer wall section arranged in sequence, the first end of the reinforcing bar section is fixedly connected to the steel structure of the support pile, the second end of the reinforcing bar section is fixedly connected to the first end of the fat trough section, and the second end of the fat trough section is detachably connected to the first end of the outer wall section; a water-stop structure, the water-stop structure is sleeved on the fat trough section, and the water-stop structure can swell when it encounters water to seal the waterproof layer that penetrates. The water-stop structure is sleeved on the fat trough section, and by sealing the fat trough section, the integrity of the waterproof layer at key positions is ensured, thereby improving the reliability of the entire waterproof system. When encountering water, the water-stop structure can expand rapidly, tightly seal the waterproof layer that penetrates, and effectively prevent water penetration. The water-stop structure can provide reliable waterproof protection for the building, reduce the risk of leakage, and extend the service life of the building.

[0016] In the second aspect, the present invention also provides a single-sided formwork system, comprising: the tension screw as described above, and also comprising a formwork and an installation and fixing assembly, wherein one end of the tension screw is arranged inside the supporting pile, and the other end is exposed to the formwork and fixed by the installation and fixing assembly, and the gap between the formwork and the supporting pile is filled with a fertilizer trough layer, a waterproof layer and an outer wall layer in sequence, the fertilizer trough layer is arranged between the supporting pile and the outer wall layer, and the waterproof layer is arranged between the fertilizer trough layer and the outer wall layer.

[0017] Optionally, the water-stopping structure is attached to the surface of the waterproof layer facing the outer wall layer.

[0018] Beneficial Effects

[0019] Compared with the traditional method of pouring concrete using pre-buried tie screws, the single-sided formwork system provided by the present invention requires accurate positioning and fixing of the pre-buried tie screws before pouring concrete, and it is difficult to change the position once it is determined. However, the tie screws for embedding reinforcement can be positioned, drilled and installed according to actual construction needs after the support piles and other structures are completed. The construction is more flexible and can adapt to different engineering conditions and design changes. It has the advantages of high construction flexibility and reduced construction difficulty.

[0020] In a third aspect, the present invention further provides a construction method of a single-sided formwork system, comprising the following steps:

[0021] The first end of the reinforcing bar segment is fixedly connected to the steel structure of the supporting pile;

[0022] The second end of the reinforcing bar segment is fixedly connected to the first end of the fertilizer trough segment;

[0023] The template is set up at the second end of the fertilizer trough section and fixed by installing a fixing component, and concrete is filled between the template and the supporting piles to form the fertilizer trough layer;

[0024] After removing the installation and fixing assembly and the template in sequence, the second end of the fat trough section is connected to the first end of the outer wall section;

[0025] A waterproof layer is arranged outside the fertilizer tank layer, and a water-stop structure is arranged at the position where the tension screw penetrates the waterproof layer;

[0026] The template is sequentially set up at the second end of the outer wall section and fixed by the installation and fixing assembly, and concrete is filled between the template and the waterproof layer to form the outer wall layer;

[0027] After removing the installation and fixing components and the template in sequence, the construction is completed.

[0028] Optionally, the method further includes providing water stop plates in the manure trough section and the outer wall section respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic structural diagram of a tension screw rod according to an embodiment of the present invention;

[0031] Figure 2 It is a schematic structural diagram of a single-sided formwork system according to an embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 11. Rebar section; 12. Fertilizer trough section; 13. External wall section; 14. Expansion water stop ring; 15. Threaded connector; 16. Water stop plate;

[0034] 2. Template; 31. Keel; 32. Steel pipe; 33. Stopper;

[0035] 41. Support piles; 42. Fertilizer trough layer; 43. External wall layer; 44. Waterproof layer. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0037] Combine the following Figure 1 to Figure 2 , describing an embodiment of the present invention.

[0038] According to an embodiment of the present invention, on the one hand, a tension screw rod is provided, comprising:

[0039] The rod body comprises a reinforcing bar section 11, a fat trough section 12 and an outer wall section 13 which are arranged in sequence, wherein the first end of the reinforcing bar section 11 is fixedly connected to the steel structure of the support pile 41, the second end of the reinforcing bar section 11 is fixedly connected to the first end of the fat trough section 12, and the second end of the fat trough section 12 is detachably connected to the first end of the outer wall section 13;

[0040] The water-stop structure is sleeved on the fertilizer tank section 12 and can swell when exposed to water to seal the penetrating waterproof layer 44 .

[0041] It is easy to understand that there is no fixed standard value for the length of the rebar segment 11, the fat trough segment 12 and the outer wall segment 13. The length will be determined according to factors such as specific project requirements, structural design and construction conditions. Here, there is no restriction on the specific length, and it can be calculated according to actual construction needs. The rebar segment 11, the fat trough segment 12 and the outer wall segment 13 usually use steel bars with higher strength.

[0042] It should be noted that the water-stopping structure is made of high-molecular inorganic water-absorbing and expanding materials and rubber. When encountering water, these materials will quickly absorb water and expand, filling the gap between the concrete and the tension bolts, thereby achieving a water-stopping effect.

[0043] The tension screw provided in the embodiment of the present invention includes a rod body, which has a reinforcing bar section 11, a fat trough section 12 and an outer wall section 13 arranged in sequence, the first end of the reinforcing bar section 11 is fixedly connected to the steel structure of the support pile 41, the second end of the reinforcing bar section 11 is fixedly connected to the first end of the fat trough section 12, and the second end of the fat trough section 12 is detachably connected to the first end of the outer wall section 13; a water-stop structure, the water-stop structure is sleeved on the fat trough section 12, and the water-stop structure can swell when it encounters water to seal the waterproof layer 44 that penetrates. The water-stop structure is sleeved on the fat trough section 12, and the integrity of the waterproof layer 44 at key positions is ensured by sealing the fat trough section 12, thereby improving the reliability of the entire waterproof system. When encountering water, the water-stop structure can expand rapidly, tightly seal the waterproof layer 44 that penetrates, and effectively prevent water penetration. The water-stop structure can provide reliable waterproof protection for the building, reduce the risk of leakage, and extend the service life of the building.

[0044] Furthermore, the water-stop structure includes an expansion water-stop ring 14 sleeved on the fat trough section 12 and a water-stop glue provided in the gap between the expansion water-stop ring 14 and the fat trough section 12 .

[0045] It is easy to understand that the expansion water stop ring 14 can effectively fill the gap between the concrete and the tension screw after swelling in water, forming the first water stop line of defense. The water stop glue can play a role in the case that the expansion water stop ring 14 fails to completely seal, further preventing water penetration. The combination of the two provides double water stop protection, greatly improving the water stop effect.

[0046] In another optional embodiment, a water-stop strip that swells when exposed to water may also be selected as the water-stop structure.

[0047] In another optional embodiment, sealant plus rubber pad can also be used as a water stop structure. The sealant can fill the gap and play a sealing role, and the rubber pad can increase the sealing and cushioning properties. However, the waterproof effect of the sealant plus rubber pad is not as good as that of the expansion water stop ring 14. It can be used in some projects with high cost control requirements and relatively low waterproof requirements.

[0048] Furthermore, the embedded reinforcement section 11 is a steel bar.

[0049] It is easy to understand that the steel bar has high tensile strength and compressive strength, and can be firmly connected to the steel structure of the support pile 41, ensuring that the tension screw will not easily break or loosen when subjected to various external forces. Even in a complex engineering environment, such as lateral pressure during concrete pouring, earthquakes, etc., a stable connection state can be maintained.

[0050] Furthermore, the first end of the anchor bar segment 11 is fixedly connected to the steel structure of the support pile 41 by welding, and the second end of the anchor bar segment 11 is fixedly connected to the first end of the fertilizer trough segment 12 by welding.

[0051] It is easy to understand that welding can form a firm connection between the embedded reinforcement section 11 and the steel structure of the support pile 41 and the fertilizer trough section 12, with high connection strength. It can withstand large external forces such as tension, pressure and shear force, ensuring that the tension screw will not loosen or break during use, ensuring the stability and safety of the structure.

[0052] Furthermore, the second end of the fertilizer trough section 12 and the first end of the outer wall section 13 are respectively provided with threads; and a threaded connector 15 is also included, which is suitable for threadedly connecting the second end of the fertilizer trough section 12 and the first end of the outer wall section 13.

[0053] It is easy to understand that the threaded connection can be adjusted and tightened according to actual needs to adapt to different construction conditions and requirements. For example, when encountering changes in concrete thickness or construction errors, the length of the tension screw can be adjusted by rotating the threaded connector 15 to ensure that the tension screw can always play an effective supporting and fixing role.

[0054] Furthermore, it also includes:

[0055] The water stop plate 16 is sleeved on the fertilizer tank section 12 .

[0056] Furthermore, the water stop sheet 16 is sleeved on the outer wall section 13 .

[0057] It should be noted that the position and number of the water stop plates 16 can be set at intervals according to actual needs, and usually have a certain curvature, such as an arc or groove shape, to ensure that the seepage water will not directly seep out in the horizontal direction, thereby improving the water stop effect.

[0058] According to an embodiment of the present invention, on the other hand, a single-sided formwork system is also provided, comprising: the tension screw as described above, and also comprising a formwork 2 and an installation and fixing assembly, wherein one end of the tension screw is arranged inside the supporting pile 41, and the other end is exposed to the formwork 2 and fixed by the installation and fixing assembly, and the gap between the formwork 2 and the supporting pile 41 is filled with a fertilizer trough layer 42, a waterproof layer 44 and an outer wall layer 43 in sequence, the fertilizer trough layer 42 is arranged between the supporting pile 41 and the outer wall layer 43, and the waterproof layer 44 is arranged between the fertilizer trough layer 42 and the outer wall layer 43.

[0059] It should be noted that when pouring the fertilizer tank layer 42 and the outer wall layer 43, a keel 31 needs to be provided on the outside of the formwork 2, and the keel 31 is fixed by a steel pipe 32, and the steel pipe 32 is fixed by a clamping piece 33 provided on the tension screw rod to ensure the fixation of the formwork 2. The keel 31, the steel pipe 32 and the clamping piece 33 constitute an installation and fixing assembly.

[0060] It is easy to understand that the keel 31 plays a major supporting and reinforcing role in the single-sided formwork system. The keel 31 is usually made of wood or metal, which has a certain strength and rigidity and can withstand the lateral pressure during concrete pouring. Here, there is no restriction on the specific material of the keel 31, as long as stable support is ensured. When installing the keel 31, the position of the keel 31 needs to be adjusted so that it is evenly distributed on the formwork 2 to ensure that all parts of the formwork 2 can be effectively supported. Then, the keel 31 is fixed to the formwork 2 through the cooperation of the clamping piece 33 and the steel pipe 32 to ensure that the keel 31 will not be displaced during the construction process.

[0061] It is easy to understand that the steel pipe 32 is used to enhance the stability and strength of the entire fixing system. The steel pipe 32 can be of different diameters and wall thicknesses, and can be selected according to the actual needs of the project. In actual construction, the steel pipe 32 is placed horizontally or vertically on the outside of the keel 31 to form a cross support structure with the keel 31. The steel pipe 32 is connected to the keel 31 by using the clamp 33, so that the two are closely combined. In this way, the lateral pressure on the template 2 can be effectively dispersed, and the overall stability of the fixing system can be improved.

[0062] It is easy to understand that the clamping member 33 plays a key locking role in the process of fixing the formwork 2. The clamping member 33 is usually made of metal and can firmly clamp the tension screw and other fixing components. When installing the fixing assembly, the clamping member 33 is put on the tension screw and adjusted to a suitable position. Then, by tightening the nut or other means, the clamping member 33 is tightly pressed against the formwork 2, the keel 31, the steel pipe 32 and other components, thereby locking the entire fixing system together. The design of the clamping member 33 should ensure that it can withstand greater pressure and will not loosen or fall off during the construction process.

[0063] In detail, the locking member 33 in this embodiment is a butterfly buckle. The butterfly buckle is easy to install and simple to operate. In actual construction, it is only necessary to open the two wings of the butterfly buckle, put it on the tension screw, and then tighten the nut to complete the fixation. The butterfly buckle has a strong clamping force and can firmly fix the formwork 2, keel 31, steel pipe 32 and other components. The special structural design of the butterfly buckle enables it to tightly clamp the tension screw with its two wings after tightening the nut to provide stable support.

[0064] Compared with the traditional method of pouring concrete using pre-buried tie screws, the single-sided formwork system provided by the present invention requires accurate positioning and fixing of the pre-buried tie screws before pouring concrete, and it is difficult to change the position once it is determined. However, the tie screws for embedding reinforcement can be positioned, drilled and installed according to actual construction needs after the support piles 41 and other structures are completed, making the construction more flexible and able to adapt to different engineering conditions and design changes. It has the advantages of high construction flexibility and reduced construction difficulty.

[0065] Further, the water stop structure is attached to the surface of the waterproof layer 44 facing the outer wall layer 43. Of course, the water stop structure can also be attached to the surface of the waterproof layer 44 facing the fertilizer tank layer 42, or both surfaces are provided with water stop structures.

[0066] According to an embodiment of the present invention, on the other hand, a construction method of a single-sided formwork system is provided, comprising the following steps:

[0067] The first end of the embedded reinforcement section 11 is fixedly connected to the steel structure of the supporting pile 41; specifically, the connection between the embedded reinforcement section 11 and the steel structure of the supporting pile 41 can be achieved by direct insertion or by first grooving and then inserting. The insertion position and number are determined according to actual requirements.

[0068] The second end of the reinforcing bar segment 11 is fixedly connected to the first end of the fertilizer trough segment 12; specifically, the connection can be made by welding or by means of a threaded sleeve.

[0069] A template 2 is set up at the second end of the manure trough section 12 and fixed by an installation and fixing assembly consisting of a keel 31, a steel pipe 32 and a clamping piece 33, and concrete is filled between the template 2 and the supporting piles 41 to form a manure trough layer 42.

[0070] After removing the installation and fixing components and the template 2 in sequence, the second end of the fertilizer trough section 12 is connected to the first end of the outer wall section 13.

[0071] A waterproof layer 44 is arranged outside the fat groove layer 42, and a water-stop structure is arranged at the position where the tension screw penetrates the waterproof layer 44. The specific steps are: firstly, an expansion water-stop ring 14 is sleeved on the tension screw, and it is pushed until it fits the waterproof layer, and then a water-stop glue is filled in the gap between the expansion water-stop ring 14 and the tension screw to seal it.

[0072] The template 2 is sequentially set up at the second end of the outer wall section 13 and fixed by an installation and fixing assembly consisting of a keel 31, a steel pipe 32 and a clamping member 33, and concrete is filled between the template 2 and the waterproof layer 44 to form an outer wall layer 43;

[0073] After removing the installation fixing components and formwork 2 in sequence, the basement exterior wall construction is completed.

[0074] Furthermore, the method further includes the step of respectively providing water stop plates 16 in the manure trough section 12 and the outer wall section 13 .

[0075] The maximum wall thickness of the single-sided formwork system of this embodiment is 1100mm, and the spacing of the tension screws on the wall is horizontal * vertical = 500mm * 400mm. Calculated based on the height of the single-sided cast wall of 6m, the maximum axial force generated by the concrete pouring and transmitted to the three-stage tension screws and butterfly clips is 11.835kn (less than 17kn). According to the mechanical monitoring report of the butterfly clip, the rotating clamp of the butterfly clip will not be damaged when the force P = 17kn, and the greater the tension, the smaller the displacement of the steel bar clamped by the butterfly clip (the more it is pulled, the tighter it is). Therefore, the butterfly clip and the three-stage tension screw system fully meet the lateral force requirements during concrete pouring in the single-sided formwork system. Therefore, the three-stage tension screws and butterfly clips can replace the vertical diagonal braces of traditional single-sided formwork.

[0076] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A tension screw, characterized in that: include: A rod body, comprising a reinforcing bar section (11), a fat trough section (12) and an outer wall section (13) arranged in sequence, wherein the first end of the reinforcing bar section (11) is fixedly connected to the steel structure of the support pile (41), the second end of the reinforcing bar section (11) is fixedly connected to the first end of the fat trough section (12), and the second end of the fat trough section (12) is detachably connected to the first end of the outer wall section (13); A water-stop structure is sleeved on the fertilizer tank section (12), and the water-stop structure can swell when exposed to water to seal the penetrating waterproof layer (44).

2. The tension screw according to claim 1, characterized in that: The water-stop structure comprises an expansion water-stop ring (14) sleeved on the fat trough section (12) and a water-stop glue arranged in the gap between the expansion water-stop ring (14) and the fat trough section (12).

3. The tension screw according to claim 1, characterized in that: The embedded reinforcement section (11) is a steel bar.

4. The tension screw according to claim 3, characterized in that: The first end of the reinforcing bar segment (11) is fixedly connected to the steel structure of the supporting pile (41) by welding, and the second end of the reinforcing bar segment (11) is fixedly connected to the first end of the fertilizer trough segment (12) by welding.

5. The tension screw according to claim 4, characterized in that: The second end of the manure trough section (12) and the first end of the outer wall section (13) are respectively provided with threads; and a threaded connector (15) is also included, which is suitable for threadedly connecting the second end of the manure trough section (12) and the first end of the outer wall section (13).

6. The tension screw according to any one of claims 1 to 5, characterized in that: Also includes: A water stop plate (16), wherein the water stop plate (16) is sleeved on the manure trough section (12) and / or the outer wall section (13).

7. A single-sided formwork system, characterized in that: include: The tensioning screw as described in any one of claims 1 to 6 further includes a template (2) and an installation and fixing component, one end of the tensioning screw is arranged inside the supporting pile (41), and the other end is exposed to the template (2) and fixed by the installation and fixing component, and the gap between the template (2) and the supporting pile (41) is filled with a fertilizer trough layer (42), a waterproof layer (44) and an outer wall layer (43) in sequence, the fertilizer trough layer (42) is arranged between the supporting pile (41) and the outer wall layer (43), and the waterproof layer (44) is arranged between the fertilizer trough layer (42) and the outer wall layer (43).

8. The single-sided formwork system according to claim 7, characterized in that: The water-stopping structure is attached to the surface of the waterproof layer (44) facing the outer wall layer (43).

9. A construction method of a single-sided formwork system according to claim 7 or 8, characterized in that: The following steps are involved: The first end of the reinforcing bar segment (11) is fixedly connected to the steel structure of the supporting pile (41); The second end of the reinforcing bar segment (11) is fixedly connected to the first end of the fertilizer trough segment (12), The template (2) is set up at the second end of the fertilizer trough section (12) and fixed by installing a fixing component, and concrete is filled between the template (2) and the supporting pile (41) to form the fertilizer trough layer (42); After removing the installation and fixing assembly and the template (2) in sequence, the second end of the fertilizer trough section (12) is connected to the first end of the outer wall section (13); A waterproof layer (44) is arranged outside the fertilizer tank layer (42), and a water-stop structure is arranged at the position where the tension screw penetrates the waterproof layer (44); The template (2) is sequentially set up at the second end of the outer wall section (13) and fixed by the installation and fixing assembly, and concrete is filled between the template (2) and the waterproof layer (44) to form the outer wall layer (43); After the installation and fixing components and the template (2) are removed in sequence, the construction is completed.

10. The construction method of the single-side formwork system according to claim 9, characterized in that: The method also includes the steps of respectively arranging water stop plates (16) in the manure trough section (12) and the outer wall section (13).

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