Prefabricated stair structure and mounting method thereof

Abstract

The invention discloses a prefabricated stair structure and a mounting method thereof, and relates to the field of stair structures, the prefabricated stair structure comprises a first stair plate and a wall body movably arranged at one end of the first stair plate, and a fixing mechanism for connecting the first stair plate with the wall body is fixedly arranged at the end, close to the wall body, of the first stair plate; a second stair plate is movably arranged at the end, away from the wall body, of the first stair plate, and a reinforcing mechanism for connecting the first stair plate and the second stair plate is fixedly arranged in the end, close to the second stair plate, of the first stair plate. The fixing mechanism comprises a fixing block and a supporting plate slidably penetrating through the lower end of the fixing block, a rack meshed with the top end of the supporting plate is rotatably arranged on one side of the upper end of the fixing block, and a cross block meshed with the straight gear is slidably arranged in the middle of the upper end of the fixing block. Synchronous fixing of the first stair plate and the second stair plate is achieved, the whole stair structure forms a stable whole, and convenience and accuracy of stair installation are improved.

Description

Technical Field

[0001] The present application relates to structural components and building materials, and more specifically to the field of staircase structures, and in particular to a prefabricated staircase structure and an installation method thereof. Background Art

[0002] Prefabricated staircase structure refers to a staircase structure in which the stairs are pre-fabricated in the factory and then transported to the construction site for installation. It is easy to improve construction efficiency and shorten the project cycle. The factory strictly controls the quality to ensure the accuracy and durability of the components. In addition, it is also easy to reduce on-site costs and reduce pollution and resource waste caused by wet operations.

[0003] At present, prefabricated staircase structures are mostly composed of stair slabs, platform slabs and platform beams. During the hoisting process, the overall weight of the stairs is too heavy, which makes the hoisting operation difficult. In addition, in limited space and complex construction environments, the excessive weight makes it difficult to accurately control the installation position and angle of the stairs. If you are not careful, it is easy to cause collisions between components, resulting in damage to the prefabricated staircase components, affecting the building quality and service life, and increasing construction risks. Summary of the invention

[0004] In order to improve the problem that the prefabricated staircase structure is too heavy, resulting in difficulty in lifting and difficulty in accurately controlling the installation position, the present application provides a prefabricated staircase structure and an installation method thereof.

[0005] The present application provides a prefabricated staircase structure and an installation method thereof using the following technical solutions: A prefabricated stair structure comprises a stair tread 1 and a wall on which one end of the stair tread 1 is movably arranged, wherein the end of the stair tread 1 close to the wall is fixedly provided with a fixing mechanism for connecting the stair tread 1 to the wall, the end of the stair tread 1 away from the wall is movably provided with a stair tread 2, and the end of the stair tread 1 close to the stair tread 2 is fixedly provided with a reinforcing mechanism for connecting the stair tread 1 to the stair tread 2; the fixing mechanism comprises a fixing block and a supporting plate slidably penetrated through the lower end of the fixing block, a supporting plate meshing with the top end of the supporting plate is rotatably provided on one side of the upper end of the fixing block, and a cross block meshing with a spur gear is slidably provided in the middle of the upper end of the fixing block.

[0006] By adopting the above technical solution, the fixing mechanism realizes a stable connection between stair tread one and the wall through the cooperation of the fixing block, the support plate and the cross block with the spur gear. The reinforcement mechanism is arranged inside the connecting end of stair tread one and stair tread two to facilitate strengthening the connection between stair tread one and stair tread two.

[0007] Preferably, the reinforcement mechanism comprises a fixed rod and limit blocks 1 slidably arranged at both ends of the fixed rod, and a transmission rod 1 and a transmission rod 2 are movably arranged at the upper and lower ends of the two limit blocks 1 respectively.

[0008] By adopting the above technical solution, the reinforcement mechanism realizes the reinforcement and stable transmission of the connection between stair tread 1 and stair tread 2 through a fixed rod and a slidable limit block 1 at both ends, in cooperation with transmission rod 1 and transmission rod 2 at the upper and lower ends of limit block 1.

[0009] Preferably, both ends of the fixing rod away from the support plate are movably provided with limit blocks 2, the middle parts of the two limit blocks 2 are slidably penetrated by clamping blocks, and the opposite side of the end of the two clamping blocks away from the limit block 2 is fixed with a rectangular block.

[0010] By adopting the above technical solution, the second limit block slides inside and penetrates the clamping block, and is cooperated with by the rectangular block on the opposite side of the end of the clamping block to form a clamping limit and structural reinforcement effect on the stair slab connection area.

[0011] Preferably, a fixing groove 2 is formed at one end of the stair tread 1 facing away from the wall, and opposite sides of the two limit blocks 2 are fixed to the inner walls of both sides of the fixing groove 2.

[0012] By adopting the above technical solution, the structure provides support for the limit block 2 and related components, ensuring the reliability and stability of the structure at the connection between the stair tread 1 and the stair tread 2.

[0013] Preferably, the end of the stair board 1 facing away from the wall is located above the fixed groove 2 and has rectangular grooves on both sides, and the inner bottom surface of the two rectangular grooves and the top of the two limit blocks 1 are fixed with fixed columns 1 that rotate and pass through the two ends of the two transmission rods 1.

[0014] By adopting the above technical solution, the structure provides a stable fulcrum and a rotation path for the transmission rod 1 through the cooperation of the rectangular groove, the fixing column 1 and the transmission rod 1.

[0015] Preferably, the bottom ends of the two limit blocks 1 and the bottom ends of the two clamping blocks on one side close to the fixed rod are fixed with fixed columns 2 which rotate and pass through the two ends of the two transmission rods 2.

[0016] By adopting the above technical solution, the second fixed column is used as the rotation fulcrum of the second transmission rod, so that the transmission rod can rotate around the second fixed column, thereby driving the clamping block to slide in the second limit block, thereby achieving the clamping and fixing of the second stair board by the clamping block.

[0017] Preferably, one end of the support plate away from the fixing block slides through the stair tread 1.

[0018] By adopting the above technical solution, the support plate penetrates the stair tread one to achieve the preset depth of the fixed block and the stair tread one. The design of the support plate is convenient for sliding inside the stair tread one under the action of external force. During installation, it cooperates with other parts of the fixing mechanism to achieve a stable connection with the wall and support for the stair tread one.

[0019] Preferably, reinforcing bars are fixedly arranged at both ends of one side of the first stair slab close to the second stair slab, and the reinforcing bars penetrate through the second stair slab.

[0020] By adopting the above technical solution, the reinforcing bars penetrate through the second stair slab, which is convenient for enhancing the connection strength between the first stair slab and the second stair slab.

[0021] Preferably, the fixing mechanism and the reinforcing bars act as a beam body to support the first stair slab and the second stair slab.

[0022] By adopting the above technical solution, the cooperation of the fixing mechanism and the reinforcing bars realizes the function of the beam, provides support for the first stair slab and the second stair slab, and ensures the stability of the stair structure.

[0023] A precast stair installation method for the above precast stair structure includes the following steps: S1. When installing the stairs, first use a crane to lift the two ends of the first stair slab, insert the fixing mechanism into the first fixing groove on the wall surface, and then use a steel wire rope to preliminarily fix the first stair slab and the wall. S2. Then lift the two ends of the second stair slab, move the second stair slab towards the first stair slab. After a part of the reinforcing bars on one side of the first stair slab is inserted into both ends of one side of the second stair slab, push the second stair slab to drive the first stair slab to move towards the wall, so that the support plate moves under the longitudinal force, drives the cross block to move upward and snap into the cross groove above the first fixing groove, and at the same time drives the two clamping blocks and the two rectangular blocks to move relatively, so that the two rectangular blocks snap into the middle of the clamping block. S3. Finally, pour cement mortar at the first grouting hole, the second grouting hole of the first stair slab and the third grouting hole of the second stair slab to reinforce the connection between the first stair slab, the second stair slab and the wall.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By using a crane to hoist the first stair slab, embedding the fixing block into the first fixing groove of the wall, and temporarily fixing it with a steel wire rope, then hoisting the second stair slab, it is ensured that the first stair slab remains stable during the subsequent hoisting of the second stair slab and will not be displaced or shaken due to external forces. Insert the reinforcing bars into the second stair slab, the support plate drives the spur gear, and the cross block snaps into the cross groove, providing an important fixing point for the stair structure, enhancing the overall stability of the stairs. At the same time, drive the fixing rod to move, so that the rectangular block is embedded into the clamping block, realizing the synchronous fixation of the first stair slab and the second stair slab, making the entire stair structure form a stable whole, improving the convenience and accuracy of stair installation, and enhancing the safety and reliability of the stairs during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an overall axonometric schematic diagram of the present application; Figure 2 is a partial structural decomposition diagram of the present application; Figure 3 This is a schematic structural diagram of the fixing mechanism and the reinforcement mechanism of the present application; Figure 4 This is a partial structural schematic diagram of the fixing mechanism of the present application; Figure 5 This is a partial structural schematic diagram of the reinforcement mechanism of the present application; Figure 6 This is a schematic internal structure diagram of the first staircase slab of the present application; Figure 7 This is a partial sectional view of the present application; Figure 8 is Figure 7 the enlarged view at A in Figure 9 is Figure 7 the enlarged view at B in.

[0026] Reference signs: 1, the first staircase slab; 2, the fixing mechanism; 3, the reinforcement mechanism; 4, the second staircase slab; 5, the wall; 6, the first fixing groove; 7, the cross groove; 8, the first grouting hole; 9, the second grouting hole; 10, the steel bar; 11, the third grouting hole; 12, the first sliding groove; 201, the fixing block; 202, the support plate; 203, the cross block; 204, the spur gear; 205, the grouting hole; 206, the movable groove; 207, the second sliding groove; 208, the grouting cavity; 301, the fixing rod; 302, the first limiting block; 303, the first transmission rod; 304, the second transmission rod; 305, the second limiting block; 306, the clamping block; 307, the rectangular block; 308, the second fixing groove; 309, the rectangular groove; 310, the first fixing column; 311, the second fixing column; 313, the clamping groove; 314, the clamping block. Detailed implementation manners

[0027] The following further elaborates on the present application in conjunction with the attached Figures 1-9 drawings.

[0028] The embodiment of the present application discloses a precast staircase structure and its installation method.

[0029] Embodiment 1 Refer to Figure 1 , Figure 2The prefabricated staircase structure of the present application belongs to structural components and building materials, and provides a prefabricated staircase structure, including a stair tread 1 and a wall 5 movably arranged at one end of the stair tread 1, a fixing mechanism 2 is fixedly arranged at the end of the stair tread 1 close to the wall 5, and a fixing groove 6 corresponding to the fixing mechanism 2 is opened on the side of the wall 5 facing the fixing mechanism 2, the fixing mechanism 2 is used to fix the stair tread 1 to the wall 5, and a stair tread 2 4 is movably arranged at the end of the stair tread 1 away from the wall 5, and a reinforcement mechanism 3 is fixed inside the end of the stair tread 1 close to the stair tread 2 4, and the reinforcement mechanism 3 is used to fix the stair tread 1 to the stair tread 2 4, and the fixing mechanism 2 and the reinforcement mechanism 3 are both made of structural steel and other construction steel materials; after the fixing mechanism 2 and the reinforcement mechanism 3 are installed in place, the butt joint end faces of the stair tread 1 and the wall 5, and the butt joint end faces of the stair tread 1 and the stair tread 2 4 are tightly fitted without gaps.

[0030] Before the installation of the staircase structure, a groove of a fixing groove 6 and a cross groove 7 is formed at the wall 5 corresponding to each step of the staircase by a cast-in-place concrete mold. After the cement mortar is completely solidified, the mold is removed. The fixing mechanism 2 and the reinforcement mechanism 3 are fixed on both sides of the stair slab 1 through unified prefabrication in the factory, and a grouting hole 18 and a grouting hole 29 are opened at the top of the stair slab 1, and a grouting hole 3 11 is opened on both sides of the top of the stair slab 2 4. The two ends of the stair slab 1 are hoisted by a crane, so that the fixing mechanism 2 is accurately inserted into the fixing groove 6, and the stair slab 1 is preliminarily fixed with a steel wire rope. The two ends of the stair slab 2 4 are hoisted by a crane, so that the steel bar 10 is inserted into the circular groove on one side of the stair slab 2 4, and then the stair slab 2 4 is pushed toward the wall 5 to drive the stair slab 1 close to the wall 5, so that the fixing mechanism 2 is completely inserted and fixed in the fixing groove 6, and the reinforcement mechanism 3 fixes the stair slab 2 4 at the same time, and the cement mortar is injected into the grouting hole 1 8, the grouting hole 2 9 and the grouting hole 3 11 and sealed.

[0031] Reference Figure 3 , Figure 4 The fixing mechanism 2 includes a fixing block 201 and a support plate 202 that is slidably arranged at the lower end of the fixing block 201. The fixing block 201 is fixed to the stair slab 1 at one side close to the stair slab 1. A movable groove 206 is provided in the middle of the upper end of the fixing block 201. A second slide groove 207 is provided in the middle of the lower end of the fixing block 201. The movable groove 206 is connected with the second slide groove 207. The support plate 202 slides inside the second slide groove 207, and the shape of the second slide groove 207 is adapted to the shape of the support plate 202 (such as Figure 4As shown in the figure), a spur gear 204 is rotatably arranged on one inner wall of the movable groove 206. A rotating shaft is fixedly penetrated through the middle of the spur gear 204. The two ends of the rotating shaft are respectively rotatably connected to the two inner walls of one end of the movable groove 206 close to the wall body 5. A first meshing groove is formed in the middle of the top end of the support plate 202. The length of the first meshing groove is equal to the distance when the fixing block 201 is completely inserted into the first fixing groove 6. The first meshing groove meshes with the teeth on the surface of the spur gear 204. A cross block 203 is slidably arranged on the inner wall of the movable groove 206. The shape of the cross block 203 is adapted to the shape of the movable groove 206 (as Figure 4 shown in the figure). A second meshing groove is formed on one side of the cross block 203 close to the spur gear 204. The second meshing groove meshes with the teeth on the surface of the spur gear 204. And the support plate 202 is located directly below the spur gear 204 and the cross block 203.

[0032] During use, the fixing mechanism 2 drives the support plate 202 to move towards the wall body 5, so that the side of the support plate 202 close to the first fixing groove 6 abuts against the inner wall of the side surface of the first fixing groove 6. Continuously moving the fixing mechanism 2 causes the support plate 202 to be pushed and move towards the first stair plate 1, thereby driving the spur gear 204 to rotate and causing the cross block 203 to move upward. When the spur gear 204 is at one end of the first meshing groove at the top end of the support plate 202 close to the wall body 5, the cross block 203 is completely embedded in the cross groove 7, and the support plate 202 drives the first stair plate 1 to be tightly attached to and fixed with the wall body 5. When the spur gear 204 is at the other end of the first meshing groove at the top end of the support plate 202 away from the wall body 5, the support plate 202 drives the first stair plate 1 to be separated from the wall body 5, so that the two grouting holes 205 are exposed in the first grouting hole 8.

[0033] A grouting cavity 208 is provided in the middle of one end of the support plate 202 close to the wall 5, and grouting holes 205 are provided on both sides of the meshing groove 1 at the top of the support plate 202, and the two grouting holes 205 are connected with the grouting cavity 208. The grouting holes 205 and the grouting cavity 208 are used to fill cement mortar into the connection between the stair slab 1 and the wall 5 when the support plate 202 moves to a suitable position; a fixing groove 6 is provided at the fixing mechanism 2 on the side of the wall 5 facing the stair slab 1, and the depth of the fixing groove 6 is equal to three-fifths of the thickness of the wall 5, and a cross groove 7 matching the shape of the cross block 203 is provided on the inner top surface and the inner bottom surface of the fixing groove 6. The cross block 203 is provided with a plurality of cross grooves 7, and the cross block 203 is provided with a plurality of cross grooves 7. There is a chamfer on the top edge of 3 to facilitate the cross block 203 to slide smoothly into the cross groove 7; the cross groove 7 located at the top is used to stably clamp the cross block 203 when the cross block 203 rises, and the cross groove 7 located at the bottom is used to enhance the stability between the stair slab 1 and the wall 5 when the cement mortar enters the wall 5. A grouting hole 8 is opened on the top of the stair slab 1 close to the side of the wall 5. The grouting hole 8 is located directly above the two grouting holes 205 when the support plate 202 moves to the preset position, so as to expose the two grouting holes 205. After the stair slab 1 and the wall 5 are fixed, cement mortar is poured in to make the connection between the stair slab 1 and the wall 5 more stable.

[0034] When the two grouting holes 205 are completely exposed in the grouting hole 8, it means that the support plate 202 moves to the preset position, and then cement mortar is poured into the grouting hole 8. The cement mortar flows into the fixed groove 6, the cross groove 7, the movable groove 206 and the slide groove 207 through the grouting hole 205 and the grouting cavity 208 to reinforce the connection between the wall 5 and the stair slab 1, and then the grouting hole 8 is sealed with a sealing plug to prevent the cement mortar from overflowing.

[0035] Reference Figures 5-9 , a fixing groove 2 308 is provided on the side away from the fixing mechanism 2, a rectangular groove 309 is provided on the stair plate 1 located above the fixing groove 2 308, and a slide groove 12 is provided in the middle of the stair plate 1 located in the fixing groove 2 308, and the shape of the slide groove 12 is adapted to the specific shape and position distribution of the support plate 202 (such as Figure 6As shown in the figure, the first chute 12 communicates with the second chute 207. One end of the support plate 202 away from the fixed block 201 slides through the inside of the first stair plate 1 through the first chute 12. A second grouting hole 9 is provided directly above the top end of the first stair plate 1 in the second fixing groove 308. The second grouting hole 9 is used to pour cement mortar for reinforcement after the second stair plate 4 and the third grouting hole 11 are fixed; the reinforcement mechanism 3 includes a fixed rod 301 and a first limiting block 302 slidably arranged at both ends of the fixed rod 301. One end of the fixed rod 301 close to the support plate 202 is fixed to the support plate 202. First fixing columns 310 are fixedly provided on the top ends of the two first limiting blocks 302 and the inner bottom surfaces of the two rectangular grooves 309. The bottom ends of the two first fixing columns 310 close to the two first limiting blocks 302 are respectively fixed to the top ends of the two first limiting blocks 302. The two ends of the two first fixing columns 310 away from the two first limiting blocks 302 are respectively fixed to the inner top surface and the inner bottom surface of the two rectangular grooves 309.

[0036] The movement of the support plate 202 causes the fixed rod 301 to push towards the second stair plate 4, and then causes the two first limiting blocks 302 to slide in opposite directions, causing the two first transmission rods 303 to rotate respectively around the first fixing columns 310 at the top ends of the two first limiting blocks 302. At the same time, the two second transmission rods 304 rotate respectively around the two second fixing columns 311 at the bottom ends of the two first fixing columns 310, thereby driving the two clamping blocks 306 to slide in opposite directions inside the second limiting block 305.

[0037] The first transmission rods 303 and the second transmission rods 304 are respectively movably arranged at the upper and lower ends of the two first limiting blocks 302. The two ends of the two first transmission rods 303 are respectively symmetrically rotatably sleeved on the four first fixing columns 310. Second fixing columns 311 are fixedly provided at the bottom ends of the two first limiting blocks 302 and the bottom ends of the two clamping blocks 306 close to the second limiting block 305. The two ends of the two second transmission rods 304 are respectively symmetrically rotatably sleeved on the four second fixing columns 311; on the opposite sides of the two ends of the fixed rod 301 away from the support plate 202, second limiting blocks 305 are respectively movably arranged. The opposite sides of the two second limiting blocks 305 are fixed to the middle parts of the two sides of the inner wall of the second fixing groove 308. Clamping blocks 306 are respectively slidably arranged in the middle parts of the two second limiting blocks 305. The shape of the clamping blocks 306 is (as Figure 3 shown). Rectangular blocks 307 are fixedly provided on the opposite sides of the ends of the two clamping blocks 306 away from the second limiting block 305; through the compound lever movement of the fixed rod 301, the first limiting block 302, the first transmission rod 303 and the second transmission rod 304, the linear displacement is converted into the transverse clamping movement of the clamping block 306; the moving distance of the fixed rod 301 is equal to the sliding distance of the clamping block 306 inside the second limiting block 305. When the fixed rod 301 moves to the limit distance, the two rectangular blocks 307 are in contact.

[0038] Drive two rectangular blocks 307 to move in opposite directions at the same time, so that the two rectangular blocks 307 move towards the second staircase plate 4 in opposite directions at the same time and move to the grooves in the middle of the clamping blocks 314, thereby firmly fixing the second staircase plate 4 and the first staircase plate 1.

[0039] A clamping groove 313 is formed at the upper end of the side of the second staircase plate 4 close to the first staircase plate 1. A clamping block 314 is fixedly arranged in the middle of the clamping groove 313. A groove is formed in the middle of the clamping block 314. The shape of the groove is adapted to the shape of the rectangular block 307 and is used to clamp the two rectangular blocks 307 when the two rectangular blocks 307 approach each other. Reinforcing bars 10 are fixedly arranged at both ends of the side of the first staircase plate 1 close to the second staircase plate 4. Circular grooves are formed at the corresponding positions of the two reinforcing bars 10 on the second staircase plate 4. The two reinforcing bars 10 are inserted into the two circular grooves. A grouting hole three 11 is formed in the middle of the top end of the second staircase plate 4 directly above the two reinforcing bars 10. The grouting hole three 11 is used to pour cement mortar into the reinforcing bars 10 and the circular grooves for reinforcement when the reinforcing bars 10 are inserted into the circular grooves.

[0040] After injecting cement mortar into the grouting hole one 8, pour cement mortar into the grouting hole two 9 and the grouting hole three 11. The cement mortar flows through the grouting hole two 9 and the grouting hole three 11 into the gap between the first staircase plate 1 and the second staircase plate 4, and into the gap between the reinforcing bar 10 and the circular groove. Then, seal the grouting hole two 9 and the grouting hole three 11 with a sealing plug.

[0041] The implementation principle of a prefabricated staircase structure in an embodiment of the present application is as follows: lift the two ends of the stair slab 1 by a crane, insert the fixing mechanism 2 into the fixing groove 6 and perform preliminary fixing with a steel wire rope; then lift the two ends of the stair slab 24, insert the steel bar 10 into the circular groove on one side of the stair slab 24, push the stair slab 24 to drive the stair slab 1 close to the wall 5, so that the fixing mechanism 2 drives the support plate 202 to move, so that the support plate 202 contacts the inner wall of the fixing groove 6, and then drives the spur gear 204 to rotate to make the cross block 203 rise. When the cross block 203 is completely embedded in the cross groove 7, the two grouting holes 205 will be exposed in the grouting hole 8, and the support plate 202 simultaneously drives the fixing rod 301 to move toward the stair slab 24, so that the limit block 1 302 moves along the fixing rod 301 slides, so that the transmission rod 1 303 and the transmission rod 2 304 are transmitted, thereby driving the clamping block 306 and the rectangular block 307 to move in relative directions, so that the two rectangular blocks 307 are clamped in the clamping block 314; cement mortar is poured into the grouting hole 8, and the cement mortar flows into the fixed groove 1 6 and the cross groove 7, the movable groove 206 and the slide groove 2 207 through the grouting hole 205 and the grouting cavity 208, so that the gap at the connection between the wall 5 and the stair slab 1 is sealed and reinforced, and cement mortar is poured into the grouting hole 2 9 and the grouting hole 3 11, and the cement mortar flows into the connection between the stair slab 1 and the stair slab 2 4 and the gap between the steel bar 10 and the circular groove, and then the grouting hole 1 8, the grouting hole 2 9 and the grouting hole 3 11 are sealed with sealing plugs to prevent the cement mortar from overflowing.

[0042] Example 2 A prefabricated stair installation method, applied to the above-mentioned prefabricated stair structure, comprises the following steps: S1. When the stair slab 1 is hoisted to one side of the wall 5, the position of the stair slab 1 is monitored in real time by a laser positioning device, so that the operator can accurately control the crane to gradually bring the stair slab 1 closer to the wall 5, insert the fixing mechanism 2 into the fixing groove 6, and then temporarily fix it between the stair slab 1 and the wall 5 by a steel wire rope. When the staff winds the steel wire rope around the fixing points of the stair slab 1 and the wall 5 and applies a certain pulling force, friction is generated between the steel wire rope and the surface of the stair slab 1 to prevent the stair slab 1 from being displaced during the subsequent installation process; S2. The crane starts again and conducts a hoisting operation on the second stair slab 4, causing the second stair slab 4 to move along a predetermined trajectory towards the direction of the first stair slab 1. When the second stair slab 4 gradually approaches the first stair slab 1, the operator adjusts the position of the second stair slab 4 with the assistance of visual observation and measuring tools, aligning the reinforcing bar 10 part on one side of the first stair slab 1 with the corresponding positions at both ends on one side of the second stair slab 4, and inserting the reinforcing bar 10 part into the circular grooves on one side of the second stair slab 4. Subsequently, the staff member pushes the second stair slab 4. Since the first stair slab 1 and the wall 5 are preliminarily fixed by a steel wire rope, the displacement of the first stair slab 1 in the vertical direction is restricted, causing the first stair slab 1 to move horizontally towards the wall 5, making the support plate 202 move longitudinally under the action of force, driving the spur gear 204 to rotate, causing the cross block 203 to move upward and embed into the cross groove 7, and at the same time causing the clamping block 306 and the rectangular block 307 to move in opposite directions and snap into the groove in the middle of the clamping block 314; S3. After the first grouting hole 8, the second grouting hole 9 of the first stair slab 1 and the third grouting hole 11 of the second stair slab 4 are filled with cement mortar, the cement mortar quickly penetrates into the tiny gaps and crevices between the components by virtue of its fluidity and filling property. Then, the first grouting hole 8, the second grouting hole 9 and the third grouting hole 11 are sealed to prevent the cement mortar from overflowing.

[0043] The above are only optional embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A precast staircase structure, characterized in that: The invention comprises a stair tread (1) and a wall (5) movably arranged at one end of the stair tread (1), wherein a fixing mechanism (2) for connecting the stair tread (1) with the wall (5) is fixedly arranged at one end of the stair tread (1) close to the wall (5), a stair tread (4) is movably arranged at one end of the stair tread (1) away from the wall (5), and a reinforcing mechanism (3) for connecting the stair tread (1) with the stair tread (4) is fixedly arranged inside one end of the stair tread (1) close to the stair tread (4); The fixing mechanism (2) comprises a fixing block (201) and a support plate (202) slidably disposed through the lower end of the fixing block (201); a support plate (202) rotatably disposed on one side of the upper end of the fixing block (201) and meshing with the top end of the support plate (202); and a cross block (203) slidably disposed in the middle of the upper end of the fixing block (201) and meshing with the spur gear (204).

2. A precast staircase structure according to claim 1, characterized in that: The reinforcement mechanism (3) comprises a fixed rod (301) and a first limit block (302) slidably arranged at both ends of the fixed rod (301), and a first transmission rod (303) and a second transmission rod (304) are movably arranged at the upper and lower ends of the two first limit blocks (302).

3. A precast staircase structure according to claim 2, characterized in that: The two ends of the fixed rod (301) away from the support plate (202) are movably provided with two limit blocks (305), the middle parts of the two limit blocks (305) are slidably penetrated by a clamping block (306), and the two clamping blocks (306) are fixedly provided with a rectangular block (307) on the opposite side of the end away from the limit block (305).

4. A precast staircase structure according to claim 3, characterized in that: A fixing groove 2 (308) is provided at one end of the stair slab 1 (1) facing away from the wall (5), and opposite sides of the two limiting blocks 2 (305) are fixed to the inner walls of both sides of the fixing groove 2 (308).

5. A precast staircase structure according to claim 1, characterized in that: The end of the stair tread 1 (1) facing away from the wall (5) is located above the fixing groove 2 (308) and is provided with rectangular grooves (309) on both sides. The inner bottom surfaces of the two rectangular grooves (309) and the top ends of the two limit blocks 1 (302) are fixed with fixing columns 1 (310) that rotate and pass through the two ends of the two transmission rods 1 (303).

6. A precast staircase structure according to claim 5, characterized in that: The bottom ends of the two limit blocks (302) and the bottom ends of the two clamping blocks (306) on one side close to the fixed rod (301) are both fixed with fixed columns (311) that rotate and penetrate through the two ends of the two transmission rods (304).

7. A precast staircase structure according to claim 1, characterized in that: One end of the support plate (202) away from the fixing block (201) slides through the stair tread one (1).

8. A precast staircase structure according to claim 1, characterized in that: Both ends of the stair slab 1 (1) on one side close to the stair slab 2 (4) are fixed with steel bars (10) penetrating the stair slab 2 (4).

9. A precast staircase structure according to claim 1, characterized in that: The fixing mechanism (2) and the steel bar (10) act as a beam body and support the first stair slab (1) and the second stair slab (4).

10. A method for installing a prefabricated staircase, applied to a prefabricated staircase structure according to any one of claims 1 to 9, comprising the following steps: S1. When installing the staircase, first use a crane to lift the two ends of the first staircase slab (1), insert the fixing mechanism (2) into the first fixing groove (6) on the surface of the wall (5), and then use a steel wire rope to preliminarily fix the first staircase slab (1) and the wall (5). S2. Then lift the two ends of the second staircase slab (4), move the second staircase slab (4) towards the first staircase slab (1). After a part of the steel bars (10) on one side of the first staircase slab (1) are inserted into the two ends on one side of the second staircase slab (4), push the second staircase slab (4) to drive the first staircase slab (1) to move towards the wall (5), so that the support plate (202) moves under the longitudinal force, driving the cross block (203) to move upward and engage into the cross groove (7) above the first fixing groove (6). At the same time, drive the two clamping blocks (306) and the two rectangular blocks (307) to move relatively, so that the two rectangular blocks (307) are engaged into the middle of the clamping block (314). S3. Finally, pour cement mortar at the first grouting hole (8), the second grouting hole (9) of the first staircase slab (1) and the third grouting hole (11) of the second staircase slab (4) to reinforce the connection between the first staircase slab (1), the second staircase slab (4) and the wall (5).

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