A directional steel formwork for stair steps and construction method thereof

Abstract

The present invention discloses a directional steel formwork for stair steps, comprising a support frame, a support formwork and a step ladder steel formwork, wherein the support frame is vertically fixedly installed between upper and lower floors and is used to support and fix the support formwork, the support formwork is obliquely installed between the upper floor and the lower floor, the step ladder steel formwork is fixed along the surface of the support formwork, two or more fixed channel steel bars are installed in parallel above the step ladder steel formwork, and the fixed channel steel bars, the step ladder steel formwork and the support formwork are fixedly connected by a tie rod assembly, and the present invention also discloses a construction method, wherein concrete slurry is continuously poured from the grouting port at the top of the step ladder steel formwork until it is full, and after the concrete slurry reaches the specified strength, the steel formworks can be removed in sequence. The present invention can make it easy to remove the concrete after pouring and shaping, and each component of the support formwork can be reused, which is convenient for turnover and reduces the material consumption and cost of construction.

Description

Technical Field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a directional steel template for stair treads and a construction method. Background Art

[0002] Stairs are an important structure in housing construction. At present, with the development of housing construction science, the requirements for housing, infrastructure and other building patterns are constantly improving, and the architectural design style is also constantly developing. The design patterns of high-rise and super-high-rise buildings are increasing. On the other hand, the construction industry itself has certain requirements for the safety, quality, progress and cost of buildings. As an important structure in housing construction, stairs are an important passage between upper and lower floors. Due to their special shape, special molds are required for pouring construction. In the current stair construction process, the stair steel formwork is first made according to the designed shape and size, and then the assembly plate is assembled into a trapezoidal support steel formwork, and then concrete is poured on the support steel formwork. During the pouring process, quality defects such as leakage and mold expansion often occur. The support steel formwork is fixed and assembled by connectors such as ingots. Since it is not convenient to disassemble and turn over the formwork again after concrete pouring, and some fixed connectors are located inside the formwork, it is difficult to remove the formwork. After the steel formwork is disassembled, it can be clearly observed that the surface of the stair concrete after pouring is honeycombed and pockmarked, and the flatness of the step surface is poor, which seriously affects the quality of concrete pouring. Summary of the invention

[0003] The purpose of the present invention is to provide a directional steel formwork for stair steps and a construction method. The directional steel formwork of the present invention can be easily removed after the concrete is poured and shaped. Each component of the directional steel formwork can be reused, which is convenient for turnover, reducing the material consumption and cost of construction. In addition, the surface of the concrete staircase has a good appearance, the tread surface is relatively flat, and the construction efficiency is improved. In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0004] According to one aspect of the present invention, a directional steel formwork for stair steps is provided, comprising a supporting frame, a supporting formwork and a tread steel formwork, wherein the supporting frame is vertically fixedly installed between upper and lower floors and is used to support and fix the supporting formwork, the supporting formwork is obliquely installed between the upper floor and the lower floor, the tread steel formwork is fixed along the surface of the supporting formwork, so that a storage space for placing concrete embedded parts is formed between the bottom of the tread steel formwork and the surface of the supporting formwork, and two or more fixed channel steel bars are installed in parallel above the tread steel formwork, the fixed channel steel bars are parallel to the plane where the tread steel formwork is located, and the fixed channel steel bars, the tread steel formwork and the supporting formwork are fixedly connected by a tie rod assembly, and the tie rod assembly vertically passes through the fixed channel steel bars, the tread steel formwork and the supporting formwork in sequence and is locked and fixed.

[0005] The above scheme is further preferred, that the tie rod assembly includes a tie screw, an upper locking nut, a lower locking nut, a sleeve and a cap, the sleeve cap is arranged on the outer surface of the supporting formwork, one end of the sleeve vertically passes through the step ladder steel mold and the supporting formwork and then is sleeved in the cap, the other end of the sleeve extends out of the step ladder steel mold, one end of the tie screw vertically passes through the fixed channel steel bar, one end of the sleeve, the step ladder steel mold, the supporting formwork, the other end of the sleeve and the cap in sequence, and is threadedly connected to the lower locking nut, and the lower locking nut is fixed to the outer surface of the supporting formwork, and the other end of the tie screw is fixed to the fixed channel steel bar through the upper locking nut.

[0006] The above scheme is further preferred, wherein the lower locking nut comprises a lower locking portion and an upper locking portion which are integrally formed with each other, the inner diameter of the upper locking portion is smaller than the inner diameter of the lower locking portion, the sleeve cap comprises a bottom plate surface and a convex cap extending upward from the bottom plate surface, and a through hole for passing a tension screw is provided at the top of the sleeve cap, wherein the bottom plate surface is in close contact with the outer surface of the supporting template, the lower locking portion is sleeved on the outer wall of the convex cap and is connected by a thread, one end of the sleeve is inserted into the convex cap, and the other end of the sleeve extends out of the outside of the step ladder steel mold, the sleeve is vertically inserted from one side of the step ladder steel mold and passes through the outer surface of the supporting template and extends into the convex cap, one end of the tension screw vertically passes through the fixed channel steel bar, one end of the sleeve, the step ladder steel mold, the supporting template, the other end of the sleeve and the convex cap in turn, and is threadedly connected to the upper locking portion, and the other end of the tension screw is fixed to the fixed channel steel bar through an upper locking nut.

[0007] The above solution is further preferred in that a butterfly-shaped twisting portion is also provided on the outer wall at the transition point between the lower locking portion and the upper locking portion.

[0008] The above scheme is further preferred in that a supporting gasket is also sleeved on the tension screw between the outer surface of the supporting template and the sleeve cap.

[0009] The above scheme is further preferred, that the fixed channel steel bar is obliquely arranged between the upper floor and the lower floor and is parallel to the plane where the step ladder steel mold is located, the upper end of the fixed channel steel bar is extended parallel to the upper surface of the upper floor and then fixed to the upper surface of the upper floor by an upper adjusting rod, the lower end of the fixed channel steel bar is extended parallel to the upper surface of the lower floor and then fixed to the upper surface of the lower floor by a lower adjusting rod, a plurality of L-shaped forming angles are arranged on the fixed channel steel bar, and the fixed channel steel bar is fixedly connected to the ascending step part of the step ladder steel mold through the L-shaped forming angles.

[0010] The above scheme is further preferred in that a support baffle is integrally formed and extends out from one side or both sides of the step ladder steel mold, and one side or both sides of the step ladder steel mold are supported on the upper surface of the support template through the support baffle, so that the step ladder steel mold, the support baffle and the support template form a storage space for placing concrete embedded parts, and a plurality of sieve holes are arranged on the flat step part of the step ladder steel mold.

[0011] The above scheme is further preferred, in which a slurry retaining plate is provided on the outer edge of the uppermost plane step of the step ladder steel mold, and a grouting port is provided on the uppermost plane step of the step ladder steel mold, and the size of the grouting port is close to the uppermost plane step part of the step ladder steel mold.

[0012] The above scheme is further preferred in that one or more grouting openings are further provided on the flat stepped portion of the step ladder steel mold, and a blocking door body for blocking the grouting openings is further provided on the edge of the opening of the grouting opening.

[0013] The above scheme is further preferred in that a supporting cross tube is provided on the lower surface of the supporting formwork, and a supporting connection assembly is provided on the supporting frame near the lowermost end and the uppermost end of the supporting formwork, and the supporting cross tube is connected to the top end of the supporting frame through the supporting connection assembly, so that the supporting formwork is fixed to the supporting frame through the supporting cross tube and the supporting connection assembly.

[0014] According to another aspect of the present invention, the present invention provides a construction method for a stair tread directional steel formwork, comprising the following steps:

[0015] Step 1, make the support formwork according to the size of the stairs, and hoist the support formwork between the upper floor and the lower floor for installation, the support formwork includes a support frame, a support formwork, a step ladder steel formwork, a fixed channel steel bar and a tie rod assembly; hoist the support formwork between the upper floor and the lower floor, select support frames of different heights to support and fix the support formwork, and adjust the height of the support frame so that the upper and lower ends of the support formwork are aligned with the height of the upper floor and the lower floor respectively;

[0016] Step 2: Make concrete embedded parts on the supporting formwork, hoist the step ladder steel formwork onto the supporting formwork, make the storage space formed between the bottom of the step ladder steel formwork and the surface of the supporting formwork larger than the space occupied by the concrete embedded parts; and completely cover the concrete embedded parts on the inner side of the edge of the supporting formwork;

[0017] Step 3, fix the fixed channel steel bar obliquely above the step ladder steel formwork 3 and connect and fix them to each other through L-shaped shaping angle steel, so as to firmly fix the step ladder steel formwork on the supporting formwork between the upper floor and the lower floor;

[0018] Step 4, fix the fixed channel steel bar obliquely on the top of the step ladder steel formwork and connect and fix them to each other through L-shaped fixed angle steel, so as to firmly fix the step ladder steel formwork on the supporting formwork between the upper floor and the lower floor;

[0019] Step 5, the sleeve is passed through the step ladder steel formwork and the supporting formwork in sequence, one end of which is reserved outside the step ladder steel formwork, and the other end is inserted into the sleeve cap on the lower surface of the supporting formwork, and then the tension screw is passed through the fixed channel steel bar, the sleeve and the sleeve cap in sequence, one end of the tension screw is threadedly connected with the tension screw and the sleeve cap through the lower locking nut, and the other end of the tension screw is fixed to the fixed channel steel bar through the upper locking nut, so that the sleeve is sleeved outside the tension screw, so that the tension screw inserted in the storage space is protected by the sleeve;

[0020] Step 6: Pour concrete slurry continuously from the grouting port at the top of the step ladder steel formwork, vibrating while pouring until it is full. After the concrete slurry reaches the specified strength, remove the tension screws, the step ladder steel formwork and the supporting formwork in turn.

[0021] The above scheme is further preferred. The above construction method of the present invention also includes spraying a release agent on the upper surface of the supporting formwork and the inner surface of the step ladder steel formwork respectively to make it easier to disassemble the steel formwork, and continuously pouring concrete slurry through the grouting port, vibrating while pouring until the grouting is completed.

[0022] In summary, since the present invention adopts the above technical solution, the present invention has the following technical effects:

[0023] (1) The directional steel formwork of the present invention is directly assembled with the supporting formwork through an integrally formed step steel formwork, and the lower surface of the step steel formwork is formed into an opening shape. After being directly assembled with the supporting formwork, a relatively closed storage space is formed, which reduces the production process of the supporting membrane and reduces the process of smoothing and finishing during pouring. The surface of the concrete stairs has a good appearance and the construction efficiency is improved. After the stairs are finalized, the disassembled step steel formwork and the supporting formwork tie rod assembly can be recycled, which saves material resources and costs and better improves the quality of the finished stairs. The manufacturing process is simple and can be customized according to the actual size.

[0024] (2) The directional steel formwork of the present invention is easy to assemble and disassemble, and each component can be reused, which is convenient for turnover, reducing the material consumption and cost of construction, and ensuring the molding quality during concrete pouring. After the concrete is poured and shaped, the step ladder steel formwork and the tension screw can be easily removed, further improving the convenience of disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1It is a schematic diagram of the construction structure of a stair tread directional steel formwork of the present invention;

[0026] Figure 2 It is a schematic diagram of the installation position structure of the support formwork and the step ladder steel formwork of the present invention;

[0027] Figure 3 It is a front three-dimensional structural schematic diagram of the step ladder steel mold of the present invention;

[0028] Figure 4 It is a schematic diagram of the back three-dimensional structure of the step ladder steel mold of the present invention;

[0029] Figure 5 It is a front view structural schematic diagram of the step ladder steel mold of the present invention;

[0030] Figure 6 is a schematic structural diagram of a support connection assembly of the present invention;

[0031] Figure 7 It is a schematic diagram of the assembly structure of the tie rod assembly of the present invention;

[0032] Figure 8 is a schematic diagram of the connection structure of the tie rod assembly of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the cap of the present invention;

[0034] In the accompanying drawings, there are a support frame 1, a support formwork 2, a step ladder steel formwork 3, a fixed channel steel bar 4, a pull rod assembly 5, a support cross tube 10, a support base plate 11, a movable support plate 12, a support ear 13, a lifting and adjusting seat 14, a concrete embedded part 20, a storage space 21, a sieve hole 31, a slurry retaining plate 32, a grouting port 33, a grouting port 34, a blocking door body 35, an upper adjusting rod 40, a lower adjusting rod 41, a tension screw 50, an upper locking nut 51, a lower locking nut 52, a sleeve 53, a sleeve cap 54, a support gasket 55, an upper floor 101, a lower floor 102, a lower locking portion 520, an upper locking portion 521, a butterfly-shaped twisting portion 522, a chassis surface 540, a convex cap 541, and a through hole 542. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are only for the purpose of enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a stair step directional steel formwork according to the present invention comprises a support frame 1, a support formwork 2 and a step ladder steel formwork 3, the number of steps of the step ladder steel formwork 3 is 8-30, preferably 16, the support frame 1 is vertically fixedly installed between the upper and lower floors and is used to support and fix the support formwork 2, the support formwork 2 is obliquely installed between the upper floor 101 and the lower floor 102, the step ladder steel formwork 3 is fixed along the surface of the support formwork 2, so that a storage space 21 for placing concrete embedded parts 20 is formed between the bottom of the step ladder steel formwork 3 and the surface of the support formwork 2 Two or more fixed channel steel bars 4 are installed in parallel above the step ladder steel mold 3. The fixed channel steel bars 4 are parallel to the plane where the step ladder steel mold 3 is located. The width of the fixed channel steel bars 4 is 8cm-15cm, and the thickness is 2cm-5mm. The fixed channel steel bars 4, the step ladder steel mold 3 and the supporting template 2 are fixedly connected by a tie rod assembly 5. The tie rod assembly 5 vertically passes through the fixed channel steel bars 4, the step ladder steel mold 3 and the supporting template 2 in turn and is locked and fixed; the fixed channel steel bars 4 are obliquely arranged between the upper floor 101 and the lower floor 102 The upper end of the fixed channel steel bar 4 is extended parallel to the upper surface of the upper floor 101 and then fixed to the upper surface of the upper floor 101 through an upper adjusting rod 40. The lower end of the fixed channel steel bar 4 is extended parallel to the upper surface of the lower floor 102 and then fixed to the upper surface of the lower floor 102 through a lower adjusting rod 41. A plurality of L-shaped shaping angle steels 6 are arranged on the fixed channel steel bar 4. The fixed channel steel bar 4 is fixedly connected to the ascending step portion of the step ladder steel mold 3 through the L-shaped shaping angle steels 6. The two L-shaped shaping angle steels 6 are connected to the ascending step portion of the step ladder steel mold 3. The upper and lower steps of the step ladder steel formwork 3 are fixed and limited to ensure the installation accuracy of the step ladder steel formwork 3 and improve the construction quality of the stairs; a support cross pipe 10 is arranged on the lower surface of the support formwork 2, and a support connection assembly is arranged on the support frame 1 near the lower and upper ends of the support formwork 2. The support cross pipe 10 is connected to the top of the support frame 1 through the support connection assembly, so that the support formwork 2 is fixed to the top of the support frame 1 through the support cross pipe 10 and the support connection assembly. The support connection assembly includes a fixed support bottom plate 11 and a movable support plate 12, such as Figure 6As shown, the support base plate 11 is detachably fixed to the support frame 1 (a support frame formed by supporting steel pipes), one end of the fixed support base plate 11 is hinged (rotatably connected) to one end of the movable support plate 12, and a plurality of support ears 13 are arranged on the outer surface of the support formwork 2, and the support ears 13 are used to respectively connect the fixed support base plate 11 and the movable support plate 12. During construction, the support ears 13 are first fixed to a suitable position on the outer surface of the support formwork 2, and then the fixed support base plate 11 is fixedly connected to the support ears 13, so that the fixed support base plate 11 is installed at the top of the support frame 1 in a horizontal or inclined state, and then the support cross pipe 10 is fixedly installed on the fixed support base plate 11, and then the lifting adjustment seat 14 at the bottom of the support frame 1 is adjusted to adjust The height of the entire support frame 1 is adjusted so that the support template 2 is stably fixedly installed on the support cross tube 10, and supported and fixed by the support frame 1, and finally the movable support plate 12 is rotated upward along the fixed support bottom plate 11 to a suitable position, so that the movable support plate 12 forms a certain angle and is in close contact with the support cross tube 10, so that the movable support plate 12 clamps the support cross tube 10 and is fixedly connected with the support ear 13 corresponding to the small surface of the support template 2 through the free end of the movable support plate 12. When disassembling, the movable support plate 12 on the support frame fixedly connected to the same support cross tube 10 can be disassembled from the corresponding support ear 13, and then the support cross tube 10 can be taken out, so as to remove the support template 2. The support template 2 is easy to install and disassemble.

[0037] In the present invention, if Figure 3 and Figure 4As shown, a support baffle 30 is integrally formed and extended on one side or both sides of the step ladder steel mold 3, and one side or both sides of the step ladder steel mold 3 is supported on the upper surface of the support template 2 by the support baffle 30, and the support baffles 30 on one side or both sides of the step ladder steel mold 3 extend downward from the lower surface of the step ladder steel mold 3, and the edges of the support baffles 30 are parallel to the support template 2, so that the step ladder steel mold 3, the support baffles 30 and the support template 2 form a storage space 21 for placing concrete embedded parts 20, and a plurality of sieve holes 31 are arranged on the plane step part of the step ladder steel mold 3; a slurry retaining plate 32 is arranged on the outer edge of the plane step at the uppermost end of the step ladder steel mold 3, and a grouting port 33 is arranged on the plane step at the uppermost end of the step ladder steel mold 3, and the size of the grouting port 33 is close to that of the step ladder The flat step portion at the top of the step steel formwork 3 is also provided with one or more grouting ports 34, and a blocking door body 35 for blocking the grouting port 34 is also provided at the edge of the opening of the grouting port 34. The blocking door body 35 is closed when pouring concrete mortar, and is opened when additional concrete mortar needs to be poured, thereby avoiding insufficient amount of concrete mortar poured in the space of the step staircase steel formwork 3 and preventing voids from forming inside the concrete step staircase. In the present invention, concrete mortar is poured from the grouting port 33 at the top, and the amount of concrete mortar is prepared by mixing sand, cement, water, etc. according to the size of the stairs. When pouring concrete mortar, concrete is poured into the storage space 21 while being vibrated, and air entering the storage space 21 is discharged through the sieve hole 31 along with the concrete mortar. When the sieve holes 31 stop emitting air and concrete flows outward, the sieve holes 31 are blocked and sealed. After the entire storage space 21 is filled, the pouring is stopped. For the storage space 21 that is not fully poured with enough mortar, voids are easily formed, which can be poured by blocking the mortar filling opening 34. During the pouring and vibration process, the force on the concrete can cause the continuously added concrete slurry to continuously slide down on the supporting formwork 2 under the action of gravity, compacting the concrete at the lower end of the supporting formwork 2. Through the protection and fixing effect of the step ladder steel mold 3 on the concrete slurry, a concrete step stair with good surface appearance quality is obtained, which does not need to be manually smoothed and pressed, and the concrete step stair has high construction efficiency. After the concrete step stair is fixed and formed, the step ladder steel mold 3 and the supporting formwork 2 connected by the pull rod assembly 5 are disassembled, and the step ladder steel mold 3 can be disassembled and recycled.

[0038] In the present invention, if Figure 7 , Figure 8 and Fig. 9As shown, the tie rod assembly 5 includes a tie screw 50, an upper locking nut 51, a lower locking nut 52, a sleeve 53 and a cap 54. The cap 54 is arranged on the outer surface of the supporting formwork 2. One end of the sleeve 53 vertically passes through the step ladder steel mold 3 and the supporting formwork 2 and is sleeved in the cap 54. The other end of the sleeve 53 extends out of the step ladder steel mold 3. One end of the tie screw 50 vertically passes through the fixed channel steel bar 4, one end of the sleeve 53, the step ladder steel mold 3, the supporting formwork 2, the other end of the sleeve 53 and the cap 54 in sequence to be threadedly connected with the lower locking nut 52, and the lower locking nut The nut 52 is fixed on the outer surface of the supporting formwork 2, and the other end of the tension screw 50 is fixed to the fixed channel steel bar 4 through the upper locking nut 51. The tension screw 50 between the outer surface of the supporting formwork 2 and the sleeve cap 54 is also sleeved with a support gasket 55. The support gasket 55 supports the sleeve cap 54 to prevent the slurry from seeping into the convex cap 541 when pouring concrete slurry. At the same time, the thickness of the support gasket 55 can be increased to increase the height of the sleeve cap 54 on the outer surface of the supporting formwork 2, so that the part of the sleeve 53 extending into the sleeve cap 54 has a larger movable gap space, so that the tension screw 50 can be easily disassembled.

[0039] In the present invention, if Figure 7 , Figure 8 and Fig. 9As shown, the lower locking nut 52 includes a lower locking portion 520 and an upper locking portion 521 which are integrally formed with each other, the inner diameter of the upper locking portion 521 is smaller than the inner diameter of the lower locking portion 520, the sleeve cap 54 includes a bottom plate surface 540 and a convex cap 541 extending upward from the bottom plate surface 540, and a through hole 542 for the tension screw 50 to pass through is provided at the top end of the sleeve cap 54, the bottom plate surface 540 is in close contact with the outer surface of the support formwork 2, the lower locking portion 520 is sleeved on the outer wall of the convex cap 541 and is connected by threads, one end of the sleeve 53 is inserted into the convex cap 541, and the other end of the sleeve 53 extends out of the outside of the step ladder steel formwork 3, and the sleeve 53 is vertically inserted from one side of the step ladder steel formwork 3 and passes through the support formwork The outer surface of the plate 2 extends all the way into the convex cap 541, and one end of the tension screw 50 vertically passes through the fixed channel steel bar 4, one end of the sleeve 53, the step ladder steel mold 3, the support template 2, the other end of the sleeve 53 and the convex cap 541 in sequence to be threadedly connected with the upper locking portion 521, and the other end (upper end) of the tension screw 50 is fixed to the fixed channel steel bar 4 through the upper locking nut 51, and a butterfly-shaped screwing portion 522 is further provided on the outer wall of the transition between the lower locking portion 520 and the upper locking portion 521, and the lower locking portion 520 on the lower locking nut 52 is threadedly connected to the outer wall of the convex cap 541 through the butterfly-shaped screwing portion 522, and the upper locking portion 521 on the lower locking nut 52 is connected to the lower end of the tension screw 50. The lower end of the tension screw 50 is fixed to the outer surface of the support formwork 2 through the sleeve cap 54 and the lower locking nut 52, and then the upper end of the tension screw 50 is fixed to the fixed channel steel bar 4 through the upper locking nut 51, so that the support formwork 2 and the step ladder steel formwork 3 are tensioned and fixed between the fixed channel steel bar 4 and the lower locking nut 52 through the tension screw 50, and a sleeve 53 (rubber sleeve or plastic sleeve) is sleeved on the tension screw 50 that penetrates into the step ladder steel formwork 3, and the upper end of the sleeve 53 is exposed on the outside of the upper surface of the step ladder steel formwork 3, and the lower end of the sleeve 53 passes through the support formwork 2 and is inserted into the convex cap 541. The inner top of the convex cap 541 is an arc-shaped wall surface, so that the convex cap 541 can support the sleeve 53 conveniently. After the tension screw 50 passes through the lower end of the sleeve 53 and the through hole 542 of the convex cap 541, the lower locking part 520 (a nut, threaded barrel or threaded tube with internal threads) is threadedly connected to the outer wall of the convex cap 541, and the upper locking part 521 (a nut or threaded barrel with internal threads) is connected to the tension screw 50. The tension screw 50 is a metal screw. Under the support of the chassis surface 540 and the lower surface of the supporting formwork 2, it is connected to the upper end of the tension screw 50 through the upper locking nut 51, so that the tension screw 50 forms a tension between the supporting formwork 2 and the step ladder steel formwork 3 and is fixed together. When pouring concrete slurry, the sleeve 53 is in direct contact with the concrete slurry in the storage space 21, while the tension screw 50 does not contact the poured concrete slurry.When disassembling after the concrete is poured and shaped, the tension screw 50 can be directly taken out from the sleeve 53, so that the tension screw 50 will not be damaged. At the same time, the sleeve 53 can be taken out so that it can be reused. The support formwork of the present invention is easy to assemble and disassemble, and each component can be reused, which is convenient for turnover, reduces the material consumption and cost of construction, and ensures the molding quality during concrete pouring. After the concrete is poured and shaped, the step ladder steel formwork 3 and the tension screw can be easily removed, which further improves the convenience of disassembly.

[0040] Combination Figures 1 to 9 The construction process of the stair tread directional steel formwork is further described, and the construction process includes the following steps:

[0041] Step 1, make the support formwork according to the size of the stairs, and hoist the support formwork between the upper floor 101 and the lower floor 102 for installation, the support formwork includes a support frame 1, a support formwork 2, a step ladder steel formwork 3, a fixed channel steel bar 4 and a tie rod assembly 5; hoist the support formwork 2 between the upper floor 101 and the lower floor 102, select support frames 1 of different heights to support and fix the support formwork 2, and adjust the height of the support frame 1 so that the upper and lower ends of the support formwork 2 are aligned with the height of the upper floor 101 and the lower floor 102 respectively;

[0042] Step 2, spraying a release agent on the upper surface of the support formwork 2 and the inner surface of the step ladder steel formwork 3 respectively, making a concrete embedded part 20 on the support formwork 2 (i.e. making a suitable steel bar skeleton and placing it on the upper surface of the support formwork 2), hoisting the step ladder steel formwork 3 onto the support formwork 2, so that the storage space 21 formed between the bottom of the step ladder steel formwork 3 and the surface of the support formwork 2 is larger than the space occupied by the concrete embedded part 20; and completely covering the concrete embedded part 20 on the inner side of the edge of the support formwork 2;

[0043] Step 3, fix the fixed channel steel bar 4 obliquely above the step ladder steel formwork 3 and connect and fix them to each other through the L-shaped shaping angle steel 6, so as to firmly fix the step ladder steel formwork 3 on the supporting formwork 2 between the upper floor 101 and the lower floor 102;

[0044] Step 4, fix the fixed channel steel bar 4 obliquely above the step ladder steel formwork 3 and connect and fix them to each other through the L-shaped shaping angle steel 6, so as to firmly fix the step ladder steel formwork 3 on the supporting formwork 2 between the upper floor 101 and the lower floor 102;

[0045] Step 5, the sleeve 53 is passed through the step ladder steel formwork 3 and the supporting formwork 2 in sequence, one end of which is reserved outside the step ladder steel formwork 3, and the other end is inserted into the sleeve cap 54 on the lower surface of the supporting formwork 2, and then the tension screw 50 is passed through the fixed channel steel bar 4, the sleeve 53 and the sleeve cap 54 in sequence, one end of the tension screw 50 is threadedly connected with the tension screw 50 and the sleeve cap 54 through the lower locking nut 52, and the other end of the tension screw 50 is fixed to the fixed channel steel bar 4 through the upper locking nut 51, so that the sleeve 53 is sleeved outside the tension screw 50, so that the tension screw 50 inserted in the storage space 21 is protected by the sleeve 53;

[0046] Step 6, pour concrete slurry continuously from the grouting port 33 at the top of the step ladder steel formwork 3, vibrating while pouring until it is full. For the poured concrete slurry, for the storage space 21 that is not fully poured with enough mortar, open the blocking door body 35 to continuously pour concrete slurry through the grouting port 34, vibrating while pouring until the grouting is completed, and close the blocking door body 35; when the concrete slurry reaches the specified strength, remove the tension screw 50, the step ladder steel formwork 3 and the supporting formwork 2 in turn.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A directional steel formwork for stair steps, characterized in that: The invention comprises a support frame (1), a support formwork (2) and a step ladder steel formwork (3); the support frame (1) is vertically fixedly installed between the upper and lower floors and is used to support and fix the support formwork (2); the support formwork (2) is obliquely installed between the upper floor (101) and the lower floor (102); the step ladder steel formwork (3) is fixed along the surface of the support formwork (2), so that a concrete embedded part (20) is formed between the bottom of the step ladder steel formwork (3) and the surface of the support formwork (2). A storage space (21) is provided, wherein two or more fixed channel steel bars (4) are installed in parallel above the step ladder steel mold (3), wherein the fixed channel steel bars (4) are parallel to the plane where the step ladder steel mold (3) is located, and the fixed channel steel bars (4), the step ladder steel mold (3) and the supporting mold plate (2) are fixedly connected by a tie rod assembly (5), and the tie rod assembly (5) vertically passes through the fixed channel steel bars (4), the step ladder steel mold (3) and the supporting mold plate (2) in sequence and is locked and fixed; The tie rod assembly (5) comprises a tie screw (50), an upper locking nut (51), a lower locking nut (52), a sleeve (53) and a sleeve cap (54); the sleeve cap (54) is arranged on the outer surface of the support formwork (2); one end of the sleeve (53) vertically passes through the step ladder steel formwork (3) and the support formwork (2) and is sleeved in the sleeve cap (54); the other end of the sleeve (53) extends out of the step ladder steel formwork (3); one end of the tie screw (50) vertically passes through the fixed channel steel bar (4), one end of the sleeve (53), the step ladder steel formwork (3), the support formwork (2), the sleeve (53) and the sleeve cap (54) in sequence. ) and the sleeve cap (54) are threadedly connected with the lower locking nut (52), and the lower locking nut (52) is fixed to the outer surface of the support template (2); the other end of the tension screw (50) is fixed to the fixed channel steel bar (4) through the upper locking nut (51); the lower locking nut (52) includes a lower locking part (520) and an upper locking part (521) which are integrally formed with each other; the inner diameter of the upper locking part (521) is smaller than the inner diameter of the lower locking part (520); the upper end of the sleeve (53) is exposed outside the upper surface of the step ladder steel mold (3), and the lower end of the sleeve (53) passes through the support template (2); A support transverse tube (10) is arranged on the lower surface of the support template (2), and a support connection assembly is arranged on the support frame (1) near the lowermost end and the uppermost end of the support template (2). The support transverse tube (10) is connected to the top end of the support frame (1) through the support connection assembly, so that the support template (2) is fixed to the support frame (1) through the support transverse tube (10) and the support connection assembly. A lifting adjustment seat (14) is arranged at the bottom end of the adjustment support frame (1). The support connection assembly includes a fixed support base plate (11) and a movable support plate (12). The support base plate (11) is detachably fixed to the support frame (1), and one end of the fixed support base plate (11) is hinged to one end of the movable support plate (12). A plurality of support ears (13) are arranged on the outer surface of the support template (2), and the support ears (13) are used to respectively connect the fixed support base plate (11) and the movable support plate (12).

2. A stair tread directional steel formwork according to claim 1, characterized in that: The sleeve cap (54) comprises a bottom surface (540) and a convex cap (541) extending upward from the bottom surface (540); a through hole (542) for the tension screw (50) to pass through is provided at the top end of the sleeve cap (54); the bottom surface (540) is in close contact with the outer surface of the supporting formwork (2); the lower locking portion (520) is sleeved on the outer wall of the convex cap (541) and connected by threads; one end of the sleeve (53) is inserted into the convex cap (541); the other end of the sleeve (53) extends out of the step ladder steel formwork (3); Externally, the sleeve (53) is vertically inserted from one side of the step ladder steel mold (3) and passes through the outer surface of the supporting template (2) and extends into the convex cap (541). One end of the tension screw (50) vertically passes through the fixed channel steel bar (4), one end of the sleeve (53), the step ladder steel mold (3), the supporting template (2), the other end of the sleeve (53) and the convex cap (541) in sequence and is threadedly connected with the upper locking part (521). The other end of the tension screw 50 is fixed to the fixed channel steel bar (4) by an upper locking nut (51).

3. A stair tread directional steel formwork according to claim 2, characterized in that: A butterfly-shaped screwing portion (522) is also provided on the outer wall of the transition point between the lower locking portion (520) and the upper locking portion (521), and a supporting gasket (55) is also sleeved on the tension screw (50) between the outer surface of the supporting template (2) and the sleeve cap (54).

4. The stair tread directional steel formwork according to claim 1, characterized in that: The fixed channel steel bar (4) is obliquely arranged between the upper floor (101) and the lower floor (102) and is parallel to the plane where the step ladder steel mold (3) is located. The upper end of the fixed channel steel bar (4) extends parallel to the upper surface of the upper floor (101) and is then fixed to the upper surface of the upper floor (101) through an upper adjustment rod (40). The lower end of the fixed channel steel bar (4) extends parallel to the upper surface of the lower floor (102) and is then fixed to the upper surface of the lower floor (102) through a lower adjustment rod (41). A plurality of L-shaped shaping angle steels (6) are arranged on the fixed channel steel bar (4). The fixed channel steel bar (4) is fixedly connected to the ascending step portion of the step ladder steel mold (3) through the L-shaped shaping angle steels (6).

5. A stair tread directional steel formwork according to claim 1 or 2 or 3 or 4, characterized in that: A support baffle (30) is integrally formed and extended from one side or both sides of the step ladder steel mold (3), and one side or both sides of the step ladder steel mold (3) are supported on the upper surface of the support template (2) through the support baffle (30), so that the step ladder steel mold (3), the support baffle (30) and the support template (2) enclose a storage space (21) for placing concrete embedded parts (20), and a plurality of sieve holes (31) are arranged on the plane step portion of the step ladder steel mold (3).

6. A stair tread directional steel formwork according to claim 5, characterized in that: A grouting enclosure (32) is hingedly provided on the outer edge of the uppermost plane step of the step ladder steel mold (3); a grouting opening (33) is provided on the uppermost plane step of the step ladder steel mold (3); the size of the grouting opening (33) is close to the uppermost plane step portion of the step ladder steel mold (3); one or more grouting openings (34) are also provided on the plane step portion of the step ladder steel mold (3); and a blocking door body (35) for blocking the grouting opening (34) is also provided on the edge of the opening of the grouting opening (33).

7. A construction method for a stair tread directional steel formwork according to any one of claims 1 to 6, characterized in that: The steps include: Step 1, manufacturing the support formwork according to the size of the stairs, and hoisting the support formwork between the upper floor (101) and the lower floor (102) for installation, wherein the support formwork comprises a support frame (1), a support formwork (2), a step ladder steel formwork (3), a fixed channel steel bar (4) and a tie rod assembly (5); hoisting the support formwork (2) between the upper floor (101) and the lower floor (102), selecting support frames (1) of different heights to support and fix the support formwork (2), and adjusting the height of the support frame (1) so that the upper and lower ends of the support formwork (2) are aligned with the height of the upper floor (101) and the lower floor (102) respectively; Step 2, making a concrete embedded part (20) on the supporting formwork (2), hoisting the step ladder steel formwork (3) onto the supporting formwork (2), making the storage space (21) formed between the bottom of the step ladder steel formwork (3) and the surface of the supporting formwork (2) larger than the space occupied by the concrete embedded part (20), and completely covering the concrete embedded part (20) on the inner side of the edge of the supporting formwork (2); Step 3, the fixed channel steel bar (4) is installed and fixed on the top of the step ladder steel formwork (3) at an angle and connected and fixed to each other through the L-shaped fixed angle steel (6), so that the step ladder steel formwork (3) is firmly fixed on the supporting formwork (2) between the upper floor (101) and the lower floor (102); Step 4, the fixed channel steel bar (4) is installed and fixed on the top of the step ladder steel formwork (3) at an angle and connected and fixed to each other through the L-shaped fixed angle steel (6), so that the step ladder steel formwork (3) is firmly fixed on the supporting formwork (2) between the upper floor (101) and the lower floor (102); Step 5, the sleeve (53) is passed through the step ladder steel mold (3) and the supporting mold (2) in sequence, one end of which is reserved outside the step ladder steel mold (3), and the other end is inserted into the sleeve cap (54) on the lower surface of the supporting mold (2), and then the tension screw (50) is passed through the fixed channel steel bar (4), the sleeve (53) and the sleeve cap (54) in sequence, one end of the tension screw (50) is threadedly connected with the tension screw (50) and the sleeve cap (54) through the lower locking nut (52), and the other end of the tension screw (50) is fixed to the fixed channel steel bar (4) through the upper locking nut (51), so that the sleeve (53) is sleeved outside the tension screw (50), so that the tension screw (50) inserted in the storage space (21) is protected by the sleeve (53); Step 6, pouring concrete slurry continuously from the grouting port (33) at the top of the step ladder steel formwork (3), vibrating while pouring until it is full. After the concrete slurry reaches the specified strength, the tension screw (50), the step ladder steel formwork (3) and the supporting formwork (2) are removed in turn.

8. The construction method of a stair tread directional steel formwork according to claim 7, characterized in that: The method also includes spraying a release agent on the upper surface of the support formwork (2) and the inner surface of the step ladder steel formwork (3), and continuously pouring concrete slurry through the grouting opening (34), vibrating while pouring, until the grouting is completed.

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