A segmented leap-level construction structure and construction method for a stairwell in a super-high-rise core tube

Abstract

The present invention discloses a segmented leap-level construction structure and construction method for a stairwell in a super-high-rise core tube, and relates to the technical field of stairwell construction in a super-high-rise core tube. The technical solution is as follows: the structure includes two construction sections, an upper section and a lower section. The upper section includes a support frame erected below the first-floor staircase position, and the support frame includes an oblique vertical rod, a transverse reinforcement rod, and a top horizontal rod. The bottom of the oblique vertical rod and one end of the top horizontal rod are both fixedly connected to the steel beam of the stairwell. The beneficial effect of the present invention is as follows: the scheme divides the core tube stairwell into two or more construction sections, an upper section and a lower section. The lower section adopts a traditional construction mode to be constructed layer by layer from the first-floor floor slab upwards, and the upper section realizes the construction of the first-floor structure. When the first-floor structure of the upper section is completed, the upper structure of the first-floor structure can be gradually constructed upwards on the basis of the first-floor structure, thereby realizing the simultaneous construction of multiple construction sections.

Description

Technical Field

[0001] The present invention relates to the technical field of stairwell construction in a super-high-rise core tube, and in particular to a segmented leap-level construction structure and a construction method for a stairwell in a super-high-rise core tube. Background Art

[0002] Super-high-rise buildings often adopt the "core tube + outer frame steel structure" form, and most utilize climbing formwork or a construction platform system to construct the core tube shear wall structure first, with the horizontal structure within the core tube and the outer frame horizontal structure constructed later. Due to the existence of the climbing formwork system, the tower crane rope cannot enter the lower part of the climbing formwork. Therefore, the core tube horizontal structure materials can only be transported horizontally through the outer frame floor slabs to the stairwell for construction. The construction speed is slow, especially in the stairwell within the core tube. Due to the small space in the stairwell, the transportation of materials is difficult. The traditional construction method is to construct each floor upwards step by step, which is slow. As a result, the stairwell within the core tube often becomes a significant factor restricting the project schedule. Summary of the Invention

[0003] In order to achieve the above-mentioned purpose of the invention and to address the above-mentioned technical problems, the present invention provides a segmented and split-level construction structure and construction method for a stairwell in a super-high-rise core tube.

[0004] The technical solution is as follows: it includes two construction sections, the upper section and the lower section. The upper section includes a support frame set up below the first-floor staircase. The support frame includes oblique vertical rods, transverse reinforcement rods and top horizontal rods. The bottom of the oblique vertical rods and one end of the top horizontal rod are fixedly connected to the steel beam of the staircase.

[0005] A steel springboard is provided on the top of the top horizontal rod;

[0006] Several embedded plates are set up on the side of the stairwell close to the shear wall. The embedded plates include steel plates and embedded threaded steel bars in a rectangular array fixed to one side of the steel plates. The embedded threaded steel bars are fixed to the shear wall using chemical anchoring.

[0007] A plurality of double channel steels are provided between the embedded plate and the steel beam, the double channel steels are located on the top of the steel springboard, and the double channel steels are fixedly connected to the embedded plate and the steel beam;

[0008] A plurality of first step vertical pole bases are provided on the top of the double channel steel, and the first step vertical pole bases are arranged perpendicular to the double channel steel. A formwork frame is provided on the top of the first step vertical pole base, and the formwork frame includes a steel bar base, an adjustment base, a vertical support, an oblique support, a horizontal rod and a rest platform formwork;

[0009] A stair formwork is provided on the top of the oblique support, and a rest platform formwork is provided on the top of the vertical support. The stair formwork includes a bottom formwork main back rib, a bottom formwork secondary back rib, a stair bottom formwork, a stair side formwork, a side formwork main back rib, a side formwork secondary back rib, a side formwork fastening bolt, a step formwork and supporting wooden planks; the bottom of the rest platform formwork is provided with a platform main back rib and a platform secondary back rib.

[0010] The oblique vertical poles and the transverse reinforcement poles are vertically arranged, the top horizontal poles are horizontally arranged on the tops of the oblique vertical poles, and the oblique vertical poles, the transverse reinforcement poles and the top horizontal poles are fixedly connected by fasteners.

[0011] The tops of the vertical supports and the oblique supports are both provided with adjustable bases;

[0012] An adjustment base is provided at the bottom of the vertical support between the first step upright pole base and the rest platform template, and a steel bar base is provided at the bottom of the vertical support between the two rest platform templates above the first step upright pole base;

[0013] The bottom of the oblique support is provided with the steel bar base;

[0014] The steel bar base at the bottom of the vertical support is composed of two transverse steel bars and one vertical steel bar, and the top of the vertical steel bar is inserted into the steel pipe of the vertical support;

[0015] The steel bar base at the bottom of the oblique support is composed of two transverse steel bars and one oblique steel bar, and the top of the oblique steel bar is inserted into the steel pipe of the oblique support;

[0016] The vertical supports are fixedly connected by two horizontal rods, the oblique supports are fixedly connected by two horizontal rods, the horizontal rods and the vertical supports are connected by fasteners; the horizontal rods and the oblique supports are connected by fasteners.

[0017] The adjustment base includes a threaded rod and an adjustment nut sleeved on the threaded rod, one end of the threaded rod is threadedly connected to the bottom of the vertically supported steel pipe, and the other end of the threaded rod is provided with a U-shaped support;

[0018] The U-shaped support at the bottom of the vertical support is clamped with the base of the first step upright pole;

[0019] The U-shaped support located at the top of the vertical support is clamped with the main back rib of the platform;

[0020] The U-shaped support located at the top of the oblique support is clamped with the main back rib of the bottom mold.

[0021] The stair bottom formwork is arranged obliquely, a bottom formwork secondary back rib is arranged at the bottom of the stair bottom formwork, and a bottom formwork main back rib is arranged at the bottom of the bottom formwork secondary back rib.

[0022] Stair side forms are arranged on both sides of the stair bottom formwork, and a plurality of notches are provided on the top of the stair side forms. The step formwork and supporting wood are arranged in the notches, and the step formwork and supporting wood are fixedly connected by steel nails;

[0023] The outer side of the stair side form is provided with a side form secondary back rib, and the outer side of the side form secondary back rib is provided with a side form main back rib. The side form main back ribs on both sides of the stair bottom form are fixedly connected by side form fastening bolts.

[0024] The side form fastening bolts use M12 tension screws.

[0025] The vertical supports of the upper and lower layers of the rest platform template are located on a vertical straight line, and the parallel oblique supports at the bottom of the upper and lower stair templates are parallel to each other.

[0026] It also includes a concrete pump pipe and a chute. The concrete pump pipe is arranged on the rest platform template of the M+1 layer. An inclined chute is arranged at the position of the stairwell pipe shaft. The chute is fixedly connected to the stair tread steel bars through steel bars. The discharge port of the concrete pump pipe corresponds to the top of the chute, and the bottom of the chute is against the rest platform template between the M layer and the M+1 layer.

[0027] The construction method of the segmented split-level construction structure of the stairwell in the super-high-rise core tube includes the following steps:

[0028] S1. Divide the stairwell in the core vertically into two or more construction sections: upper and lower sections. The lower section shall be constructed using the traditional construction method, starting from the ground floor and working upwards floor by floor.

[0029] A support frame is set up below the first floor staircase of the upper section. The support frame is made of φ48*3.6 steel pipes. The spacing between adjacent oblique vertical bars is 1m, the spacing between adjacent transverse reinforcement bars is 1.5m, and the spacing between adjacent top horizontal bars is 1m. The oblique vertical bars, transverse reinforcement bars and top horizontal bars are all fixed with fasteners to ensure the integrity of the support frame.

[0030] S2. After the support frame is erected and fixed, a steel springboard is laid on the top horizontal bar. The steel springboard serves as a temporary operating platform for construction workers. The platform is only used as an operating platform for workers to install the temporary support platform. It is strictly forbidden to stack materials on the platform.

[0031] S3. After the support frame is installed, the construction workers install embedded plates on the side of the stairwell close to the shear wall. The embedded plates serve as temporary supports. The interval between adjacent embedded plates is 1m. The steel plate size is 300*300*12mm. The embedded threaded steel bars are fixed to the shear wall with 16# embedded threaded steel bars with a length of 300mm.

[0032] S4. After the embedded plate is installed, double channel steel is installed with the embedded plate and steel beam as support. The double channel steel adopts 125*65mm channel steel. The double channel steel is fully welded to the embedded plate and steel beam to ensure that the double channel steel does not move.

[0033] S5. After the double channel steel is installed, install the first step vertical pole base on the top of the double channel steel, and then start installing the formwork frame on the first step vertical pole base. The spacing between adjacent vertical supports is 1.4m, the thickness of the rest platform formwork is 10cm, and the first horizontal bar is set up 15cm above the elevation of the rest platform formwork structure. The horizontal bar is connected to the vertical support with fasteners. The second horizontal bar is set up above the first horizontal bar. The spacing between the second horizontal bar and the first horizontal bar is 1m, and the second horizontal bar is also connected to the vertical support with fasteners.

[0034] The vertical supports of the upper and lower layers of the rest platform formwork are located on a vertical straight line to ensure that the vertical support force of the upper layer can be transmitted to the vertical support of the lower layer;

[0035] A steel base is set at the bottom of the vertical support between the two rest platform templates above the base of the first step upright. A steel base is set at the bottom of the diagonal support. The steel base is made of 22# steel bars to ensure that the bottom of the vertical support and the diagonal support are above the concrete structure elevation of the stairs, which can avoid the waste of materials caused by pouring the vertical support and the diagonal support into the concrete.

[0036] The spacing between the diagonal supports is 1.3m. The diagonal supports are connected and fixed by two horizontal rods. The spacing between the two horizontal rods is 1m. The horizontal rods and the diagonal supports are connected by fasteners. The diagonal supports at the bottom of the upper and lower stair templates are parallel to each other.

[0037] The U-shaped support at the bottom of the vertical support is connected to the base of the first step pole;

[0038] The U-shaped support at the top of the vertical support is connected to the main back rib of the platform;

[0039] The U-shaped support located at the top of the oblique support is connected to the main back rib of the bottom mold;

[0040] S6. After the formwork frame is erected, start installing the stair formwork. The stair formwork uses 18# mirror formwork and needs to be laid out according to the stair drawing before installation;

[0041] The secondary back ribs of the bottom formwork are made of 60*80mm wooden planks with a spacing of 250mm; the main back ribs of the bottom formwork are made of 100*100mm wooden planks with a spacing of 1.3m;

[0042] Before slotting the stair side formwork, slots should be made according to the position and depth of the step formwork and supporting wood (two 60*80mm wood). The step formwork and supporting wood should be fixed with steel nails.

[0043] The secondary back ribs of the side formwork are two 60*80mm wooden squares, and the main back ribs of the side formwork are two 50*100mm wooden squares. The main back ribs of the side formwork are fixed with two M12 tension screws.

[0044] The construction joint of the stair tread should be set on the tread within 1 / 3 of the end of the stair tread and perpendicular to the tread (generally three complete steps);

[0045] S7. Since the stairwell space is small and multiple stair sections need to be poured at the same time when pouring stair concrete, it is difficult for the pump pipe to penetrate into each stair section. Therefore, this patent sets a concrete pump pipe as a device for transporting concrete from the pump truck to the working surface. The concrete pump pipe is arranged on the M+1 floor rest platform template, and an inclined chute is arranged at the position of the stairwell pipe shaft. The chute is made of half a φ300mm PVC pipe and is fixed by connecting it with the stair tread steel bars through scrap steel bars. The concrete enters the first to third run pouring surfaces through the concrete pump pipe and the chute, completing the stair tread pouring construction from bottom to top.

[0046] The beneficial effects brought about by the technical solution provided by the embodiment of the present invention are: this solution provides a segmented and leap-level construction structure and construction method for the stairwell in the super-high-rise core tube. Compared with the traditional super-high-rise stairwell that is constructed step by step upward, this solution divides the entire stairwell of the core tube into two or more construction sections, the upper section and the lower section, in a vertical direction. The lowest lower section construction section adopts the traditional construction mode to be constructed layer by layer from the first floor slab upward, while the upper sections are all in a suspended state, and there is no first floor slab as support for gradual construction upward. Therefore, the main difficulty in realizing this patent lies in how to realize the construction of the first-floor structure of the upper section. When the first-floor structure of the upper section is completed, the upper structure of the first-floor structure can be gradually constructed upward on the basis of the first-floor structure, realizing the simultaneous construction of multiple construction sections, realizing leap-level construction, and significantly improving the construction efficiency of the core tube stairwell. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 Schematic diagram of the structure of the support frame according to an embodiment of the present invention.

[0048] Figure 2 This is a schematic diagram of the structure after the support frame, steel springboard and embedded plate are installed according to an embodiment of the present invention.

[0049] Figure 3 It is a structural schematic diagram of the embedded plate according to an embodiment of the present invention.

[0050] Figure 4 for Figure 3Schematic diagram of the structure after double channel steel is installed on the foundation.

[0051] Figure 5 Schematic diagram of the template frame set up in the embodiment of the present invention Figure 1 .

[0052] Figure 6 Figure 5 A partial enlarged view of .

[0053] Figure 7 This is a structural schematic diagram of the bottom of the rest platform template according to an embodiment of the present invention.

[0054] Figure 8 It is a structural schematic diagram of a steel bar base according to an embodiment of the present invention.

[0055] Figure 9 Schematic diagram of the structure of the stair bottom formwork according to an embodiment of the present invention.

[0056] Figure 10 It is a schematic structural diagram of the stair side formwork and tread formwork according to an embodiment of the present invention.

[0057] Figure 11 This is a schematic diagram of pouring concrete for stairs according to an embodiment of the present invention.

[0058] The accompanying drawings are marked as follows: 1. Support frame; 101. Oblique vertical pole; 102. Horizontal reinforcement pole; 103. Top horizontal pole; 2. Steel springboard; 3. Embedded plate; 301. Steel plate; 302. Embedded threaded steel bar; 4. Double channel steel; 5. Formwork frame; 501. Steel bar base; 502. Vertical support; 503. Oblique support; 504. Horizontal pole; 505. Rest platform formwork; 5051. Platform main back rib; 5052. Platform secondary back rib; 507 , adjusting base; 5071, threaded rod; 5072, adjusting nut; 5073, U-shaped support; 6, stair formwork; 601, main back rib of bottom formwork; 602, secondary back rib of bottom formwork; 603, stair bottom formwork; 604, stair side formwork; 605, main back rib of side formwork; 606, secondary back rib of side formwork; 607, side formwork fastening bolts; 608, step formwork; 609, supporting wood; 7, concrete pump pipe; 8, chute; 9, steel beam; 10, first step upright base. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0060] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0062] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] Example 1

[0064] See also Figures 1 to 11 The present invention provides a segmented leap-level construction structure and construction method for a stairwell in a super-high-rise core tube, which includes two construction sections, an upper segment and a lower segment. The upper segment includes a support frame 1 erected below the first-floor staircase. The support frame 1 includes an oblique vertical rod 101, a transverse reinforcement rod 102, and a top horizontal rod 103. The bottom of the oblique vertical rod 101 and one end of the top horizontal rod 103 are both fixedly connected to the steel beam 9 of the stairwell.

[0065] A steel springboard 2 is provided on the top of the top horizontal rod 103;

[0066] Several embedded plates 3 are set on the side of the stairwell close to the shear wall. The embedded plates 3 include a steel plate 301 and a rectangular array of embedded threaded steel bars 302 fixed on one side of the steel plate 301. The embedded threaded steel bars 302 are fixed to the shear wall using chemical anchoring.

[0067] A plurality of double channel steels 4 are provided between the embedded plate 3 and the steel beam 9. The double channel steels 4 are located on the top of the steel springboard 2. The double channel steels 4 are fixedly connected to the embedded plate 3 and the steel beam 9.

[0068] A plurality of first step upright pole bases 10 are provided on the top of the double channel steel 4. The first step upright pole base 10 is arranged perpendicular to the double channel steel 4. A formwork frame 5 is provided on the top of the first step upright pole base 10. The formwork frame 5 includes a steel bar base 501, an adjustment base 507, a vertical support 502, an oblique support 503, a horizontal rod 504 and a rest platform formwork 505.

[0069] A stair formwork 6 is provided on the top of the oblique support 503, and a rest platform formwork 505 is provided on the top of the vertical support 502. The stair formwork 6 includes a bottom formwork main back rib 601, a bottom formwork secondary back rib 602, a stair bottom formwork 603, a stair side formwork 604, a side formwork main back rib 605, a side formwork secondary back rib 606, a side formwork fastening bolt 607, a step formwork 608 and a supporting wooden square 609; the bottom of the rest platform formwork 505 is provided with a platform main back rib 5051 and a platform secondary back rib 5052.

[0070] The oblique vertical rods 101 and the transverse reinforcement rods 102 are vertically arranged, and the top horizontal rods 103 are horizontally arranged on the top of the oblique vertical rods 101. The oblique vertical rods 101, the transverse reinforcement rods 102 and the top horizontal rods 103 are fixedly connected by fasteners.

[0071] The tops of the vertical supports 502 and the diagonal supports 503 are both provided with adjustment bases 507;

[0072] An adjustment base 507 is provided at the bottom of the vertical support 502 located between the first step upright base 10 and the rest platform template 505, and a steel bar base 501 is provided at the bottom of the vertical support 502 located between the two rest platform templates 505 above the first step upright base 10;

[0073] A steel base 501 is provided at the bottom of the oblique support 503;

[0074] The steel base 501 at the bottom of the vertical support 502 is composed of two horizontal steel bars and one vertical steel bar, and the top of the vertical steel bar is inserted into the steel pipe of the vertical support 502;

[0075] The steel base 501 at the bottom of the oblique support 503 is composed of two transverse steel bars and one oblique steel bar, and the top of the oblique steel bar is inserted into the steel pipe of the oblique support 503;

[0076] The vertical supports 502 are fixedly connected by two horizontal rods 504 , and the diagonal supports 503 are fixedly connected by two horizontal rods 504 . The horizontal rods 504 and the vertical supports 502 are connected by fasteners; the horizontal rods 504 and the diagonal supports 503 are connected by fasteners.

[0077] The adjustment base 507 includes a threaded rod 5071 and an adjustment nut 5072 sleeved on the threaded rod 5071. One end of the threaded rod 5071 is threadedly connected to the bottom of the steel pipe of the vertical support 502. The other end of the threaded rod 5071 is provided with a U-shaped support 5073.

[0078] The U-shaped support 5073 at the bottom of the vertical support 502 is engaged with the first step upright base 10;

[0079] The U-shaped support 5073 located at the top of the vertical support 502 is engaged with the main back rib 5051 of the platform;

[0080] The U-shaped support 5073 located at the top of the oblique support 503 is engaged with the main back rib 601 of the bottom mold.

[0081] The stair bottom formwork 603 is arranged at an inclination, and a bottom formwork secondary back rib 602 is arranged at the bottom of the stair bottom formwork 603 , and a bottom formwork main back rib 601 is arranged at the bottom of the bottom formwork secondary back rib 602 .

[0082] Stair side forms 604 are set on both sides of the stair bottom form 603. Several notches are opened on the top of the stair side form 604. Step formwork 608 and supporting wood 609 are set in the notches. The step formwork 608 and supporting wood 609 are fixed together by steel nails.

[0083] The outer side of the stair side form 604 is provided with a side form secondary back rib 606, and the outer side of the side form secondary back rib 606 is provided with a side form main back rib 605. The side form main back ribs 605 on both sides of the stair bottom form 603 are fixedly connected by side form fastening bolts 607.

[0084] The vertical supports 502 of the upper and lower layers of the rest platform template 505 are located on a vertical straight line, and the oblique supports 503 at the bottom of the upper and lower stair templates 6 that are parallel to each other are parallel to each other.

[0085] It also includes a concrete pump pipe 7 and a chute 8. The concrete pump pipe 7 is arranged on the M+1 floor rest platform template 505. An inclined chute 8 is arranged at the stairwell pipe shaft position. The chute 8 is fixedly connected to the stair tread steel bars through steel bars. The discharge port of the concrete pump pipe 7 corresponds to the top of the chute 8, and the bottom of the chute 8 is against the rest platform template 505 between the M floor and the M+1 floor.

[0086] The construction method of the segmented split-level construction structure of the stairwell in the super-high-rise core tube includes the following steps:

[0087] S1. Divide the stairwell in the core vertically into two or more construction sections: upper and lower sections. The lower section shall be constructed using the traditional construction method, starting from the ground floor and working upwards floor by floor.

[0088] A support frame 1 is set up below the first floor staircase of the upper section. The support frame 1 is made of φ48*3.6 steel pipe. The spacing between adjacent oblique vertical rods 101 is 1m, the spacing between adjacent transverse reinforcement rods 102 is 1.5m, and the spacing between adjacent top horizontal rods 103 is 1m. The oblique vertical rods 101, transverse reinforcement rods 102 and top horizontal rods 103 are all fixedly connected by fasteners to ensure the integrity of the support frame 1.

[0089] S2. After the support frame 1 is erected and fixed, the top horizontal bar 103 is covered with a steel springboard 2. The steel springboard 2 serves as a temporary operating platform for construction workers. The platform is only used as an operating platform for workers to install the temporary support platform. It is strictly forbidden to stack materials on the platform.

[0090] After the support frame 1 is installed, the construction workers install the embedded plate 3 on the side of the stairwell close to the shear wall. The embedded plate 3 serves as a temporary support. The interval between adjacent embedded plates 3 is 1m. The steel plate 301 has a size of 300*300*12mm. The embedded threaded steel bar 302 is fixed to the shear wall with a length of 16# embedded threaded steel bar of 300mm.

[0091] After S4 and the embedded plate 3 are installed, the double channel steel 4 is installed with the embedded plate 3 and the steel beam 9 as support. The double channel steel 4 is made of 125*65mm channel steel. The double channel steel 4 is fully welded to the embedded plate 3 and the steel beam 9 to ensure that the double channel steel 4 does not move.

[0092] S5. After the installation of the double channel steel 4 is completed, the first step vertical pole base 10 is installed on the top of the double channel steel 4, and then the formwork frame 5 is installed on the first step vertical pole base 10. The spacing between adjacent vertical supports 502 is 1.4m, the thickness of the rest platform formwork 505 is 10cm, and the first horizontal rod 504 is set up 15cm above the structural elevation of the rest platform formwork 505. The horizontal rod 504 is connected to the vertical support 502 through a fastener. The second horizontal rod 504 is set up above the first horizontal rod 504. The spacing between the second horizontal rod 504 and the first horizontal rod 504 is 1m, and the second horizontal rod 504 is also connected to the vertical support 502 through a fastener.

[0093] The vertical supports 502 of the upper and lower layers of the rest platform template 505 are located on a vertical straight line, ensuring that the force of the vertical supports 502 of the upper layer can be transmitted to the vertical supports 502 of the lower layer;

[0094] A steel base 501 is set at the bottom of the vertical support 502 between the two rest platform templates 505 above the first step upright base 10, and a steel base 501 is set at the bottom of the diagonal support 503. The steel base 501 is made of 22# steel bars to ensure that the bottoms of the vertical support 502 and the diagonal support 503 are located above the stair concrete structure elevation, which can avoid the waste of materials caused by pouring the vertical support 502 and the diagonal support 503 into the concrete;

[0095] The spacing between the diagonal supports 503 is 1.3m. The diagonal supports 503 are connected and fixed by two horizontal rods 504. The spacing between the two horizontal rods 504 is 1m. The horizontal rods 504 and the diagonal supports 503 are connected by fasteners. The diagonal supports 503 at the bottom of the upper and lower stair templates 6 are parallel to each other.

[0096] The U-shaped support 5073 at the bottom of the vertical support 502 is engaged with the first step upright base 10;

[0097] The U-shaped support 5073 located at the top of the vertical support 502 is engaged with the main back rib 5051 of the platform;

[0098] The U-shaped support 5073 located at the top of the oblique support 503 is engaged with the main back rib 601 of the bottom mold;

[0099] After S6 and the formwork frame 5 are erected, the stair formwork 6 is installed. The stair formwork 6 uses 18# mirror formwork and needs to be laid out according to the stair drawing before installation;

[0100] The secondary back ribs 602 of the bottom mold are made of 60*80mm wood with a spacing of 250mm; the main back ribs 601 of the bottom mold are made of 100*100mm wood with a spacing of 1.3m;

[0101] Before slotting the stair side formwork 604, slots are cut according to the position and depth of the step formwork 608 and the supporting wood 609 (two 60*80mm wood pieces). The step formwork 608 and the supporting wood 609 are fixed with steel nails.

[0102] The secondary back ribs 606 of the side formwork are two 60*80mm wooden squares, and the main back ribs 605 of the side formwork are two 50*100mm wooden squares. The main back ribs 605 of the side formwork are fixed with two M12 tension screws.

[0103] The construction joint of the stair tread should be set on the tread within 1 / 3 of the end of the stair tread and perpendicular to the tread (generally three complete steps);

[0104] S7. Since the stairwell space is small and multiple stair sections need to be poured at the same time when pouring stair concrete, it is difficult for the pump pipe to penetrate into each stair section. Therefore, in this patent, a concrete pump pipe 7 is set as a device for transporting concrete from the pump truck to the working surface. The concrete pump pipe 7 is arranged on the M+1 floor rest platform template 505, and an inclined chute 8 is arranged at the position of the stairwell pipe shaft. The chute 8 is made of half a φ300mm PVC pipe and is fixed by connecting it with the stair tread steel bars through scrap steel bars. The concrete enters the first to third run pouring surfaces through the concrete pump pipe 7 and the chute 8, completing the stair tread pouring construction from bottom to top.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A segmented, split-level construction structure for stairwells within a super-high-rise core tube, characterized in that: The structure comprises two construction sections, an upper section and a lower section. The upper section comprises a support frame (1) erected below the first-floor staircase. The support frame (1) comprises an oblique vertical rod (101), a transverse reinforcement rod (102), and a top horizontal rod (103). The bottom of the oblique vertical rod (101) and one end of the top horizontal rod (103) are both fixedly connected to the steel beam (9) of the stairwell. A steel springboard (2) is provided on the top of the top horizontal rod (103); A plurality of embedded plates (3) are provided on one side of the stairwell close to the shear wall. The embedded plates (3) include a steel plate (301) and a rectangular array of embedded threaded steel bars (302) fixedly provided on one side of the steel plate (301). The embedded threaded steel bars (302) are fixed to the shear wall by chemical anchoring. A plurality of double channel steels (4) are provided between the embedded plate (3) and the steel beam (9), the double channel steels (4) being located on the top of the steel springboard (2), and the double channel steels (4) are fixedly connected to the embedded plate (3) and the steel beam (9); A plurality of first step upright pole bases (10) are provided on the top of the double channel steel (4), and the first step upright pole bases (10) are arranged perpendicular to the double channel steel (4). A formwork frame (5) is provided on the top of the first step upright pole base (10), and the formwork frame (5) includes a steel bar base (501), an adjustment base (507), a vertical support (502), an oblique support (503), a horizontal rod (504) and a rest platform formwork (505); A staircase formwork (6) is provided on the top of the oblique support (503), and a rest platform formwork (505) is provided on the top of the vertical support (502). The staircase formwork (6) comprises a bottom formwork main back rib (601), a bottom formwork secondary back rib (602), a staircase bottom formwork (603), a staircase side formwork (604), a side formwork main back rib (605), a side formwork secondary back rib (606), a side formwork fastening bolt (607), a step formwork (608) and supporting wood (609); a platform main back rib (5051) and a platform secondary back rib (5052) are provided at the bottom of the rest platform formwork (505); The tops of the vertical supports (502) and the oblique supports (503) are both provided with adjustment bases (507); An adjustment base (507) is provided at the bottom of the vertical support (502) located between the first step vertical pole base (10) and the rest platform template (505), and a steel bar base (501) is provided at the bottom of the vertical support (502) located between the two rest platform templates (505) above the first step vertical pole base (10); The bottom of the oblique support (503) is provided with the steel bar base (501); The steel bar base (501) at the bottom of the vertical support (502) is composed of two transverse steel bars and one vertical steel bar, and the top of the vertical steel bar is inserted into the steel pipe of the vertical support (502); The steel bar base (501) at the bottom of the oblique support (503) is composed of two transverse steel bars and one oblique steel bar, and the top of the oblique steel bar is inserted into the steel pipe of the oblique support (503); The vertical supports (502) are fixedly connected by two horizontal rods (504), the oblique supports (503) are fixedly connected by two horizontal rods (504), the horizontal rods (504) and the vertical supports (502) are connected by fasteners; the horizontal rods (504) and the oblique supports (503) are connected by fasteners; The adjustment base (507) comprises a threaded rod (5071) and an adjustment nut (5072) sleeved on the threaded rod (5071); one end of the threaded rod (5071) is threadedly connected to the bottom of the steel pipe of the vertical support (502); and the other end of the threaded rod (5071) is provided with a U-shaped support (5073); The U-shaped support (5073) located at the bottom of the vertical support (502) is engaged with the first step upright pole base (10); The U-shaped support (5073) located at the top of the vertical support (502) is engaged with the main back rib (5051) of the platform; The U-shaped support (5073) located at the top of the oblique support (503) is engaged with the main back rib (601) of the bottom mold; The staircase bottom mold (603) is arranged obliquely, and a bottom mold secondary back rib (602) is arranged at the bottom of the staircase bottom mold (603), and a bottom mold primary back rib (601) is arranged at the bottom of the bottom mold secondary back rib (602); Staircase side forms (604) are provided on both sides of the staircase bottom form (603), and a plurality of notches are provided on the top of the staircase side form (604), wherein the step form (608) and the supporting wood (609) are provided in the notches, and the step form (608) and the supporting wood (609) are fixedly connected by steel nails; The outer side of the staircase side form (604) is provided with a side form secondary back rib (606), and the outer side of the side form secondary back rib (606) is provided with a side form main back rib (605), and the side form main back ribs (605) on both sides of the staircase bottom form (603) are fixedly connected by side form fastening bolts (607); It also includes a concrete pump pipe (7) and a chute (8), wherein the concrete pump pipe (7) is arranged on the rest platform template (505) of the M+1 layer, and an inclined chute (8) is arranged at the position of the staircase pipe shaft, and the chute (8) is fixedly connected to the stair tread steel bars through steel bars, and the discharge port of the concrete pump pipe (7) corresponds to the top of the chute (8), and the bottom of the chute (8) is against the rest platform template (505) between the M layer and the M+1 layer; When the first-floor structure of the upper section is completed, the upper structure of the first-floor structure can be constructed gradually upwards based on the first-floor structure.

2. The segmented and split-level construction structure of the stairwell in the super-high-rise core tube according to claim 1 is characterized in that: The oblique vertical rods (101) and the transverse reinforcement rods (102) are vertically arranged between each other, and the top horizontal rods (103) are horizontally arranged on the tops of the oblique vertical rods (101). The oblique vertical rods (101), the transverse reinforcement rods (102) and the top horizontal rods (103) are all fixedly connected by fasteners.

3. The segmented and split-level construction structure of the stairwell in the super-high-rise core tube according to claim 1 is characterized in that: The vertical supports (502) of the upper and lower layers of the rest platform template (505) are located on a vertical straight line, and the parallel oblique supports (503) at the bottom of the upper and lower stair templates (6) are also parallel to each other.

4. The construction method of the segmented leap-level construction structure of the stairwell in the super-high-rise core tube according to claim 1 is characterized in that: The following steps are involved: S1. Divide the stairwell in the core vertically into two or more construction sections: upper and lower sections. The lower section shall be constructed using the traditional construction method, starting from the ground floor and working upwards floor by floor. A support frame (1) is set up below the first floor staircase of the upper section. The support frame (1) is made of φ48*3.6 steel pipe. The spacing between adjacent oblique vertical bars (101) is 1m, the spacing between adjacent transverse reinforcement bars (102) is 1.5m, and the spacing between adjacent top horizontal bars (103) is 1m. The oblique vertical bars (101), the transverse reinforcement bars (102) and the top horizontal bars (103) are all fixedly connected by fasteners to ensure the integrity of the support frame (1). S2. After the support frame (1) is erected and fixed, a steel springboard (2) is laid on the top horizontal rod (103). The steel springboard (2) serves as a temporary operating platform for construction workers. The platform is only used as an operating platform for workers to install the temporary support platform. It is strictly forbidden to stack materials on the platform. S3. After the support frame (1) is installed, the construction workers install the embedded plate (3) on the side of the staircase close to the shear wall. The embedded plate (3) plays a temporary supporting role. The interval between adjacent embedded plates (3) is 1m. The size of the steel plate (301) is 300*300*12mm. The embedded threaded steel bar (302) is fixed to the shear wall with a length of 300mm. S4. After the embedded plate (3) is installed, the double channel steel (4) is installed with the embedded plate (3) and the steel beam (9) as support. The double channel steel (4) uses a 125*65mm channel steel. The double channel steel (4) is fully welded to the embedded plate (3) and the steel beam (9) to ensure that the double channel steel (4) does not move. S5. After the installation of the double channel steel (4), the first step vertical pole base (10) is installed on the top of the double channel steel (4), and then the formwork frame (5) is installed on the first step vertical pole base (10). The spacing between adjacent vertical supports (502) is 1.4m. The thickness of the rest platform formwork (505) is 10cm. The first horizontal rod (504) is set up 15cm above the structural elevation of the rest platform formwork (505). The horizontal rod (504) and the vertical support (502) are connected by fasteners. The second horizontal rod (504) is set up above the first horizontal rod (504). The spacing between the second horizontal rod (504) and the first horizontal rod (504) is 1m. The second horizontal rod (504) and the vertical support (502) are also connected by fasteners. The vertical supports (502) of the upper and lower layers of the rest platform template (505) are located on a vertical straight line, ensuring that the force of the vertical supports (502) of the upper layer can be transmitted to the vertical supports (502) of the lower layer; A steel base (501) is provided at the bottom of the vertical support (502) between the two rest platform templates (505) above the first step upright base (10), and a steel base (501) is provided at the bottom of the diagonal support (503). The steel base (501) is made of 22# steel bars to ensure that the bottoms of the vertical support (502) and the diagonal support (503) are located above the stair concrete structure elevation, thereby avoiding the waste of materials caused by pouring the vertical support (502) and the diagonal support (503) into the concrete; The spacing between the oblique supports (503) is 1.3m, and the oblique supports (503) are connected and fixed by two horizontal rods (504), and the spacing between the two horizontal rods (504) is 1m. The horizontal rods (504) and the oblique supports (503) are connected by fasteners, and the oblique supports (503) at the bottom of the upper and lower stair templates (6) are parallel to each other; The U-shaped support (5073) at the bottom of the vertical support (502) is engaged with the first step upright base (10); The U-shaped support (5073) located at the top of the vertical support (502) is engaged with the main back rib (5051) of the platform; The U-shaped support (5073) located at the top of the oblique support (503) is engaged with the main back rib (601) of the bottom mold; S6. After the template frame (5) is erected, the stair template (6) is installed. The stair template (6) uses an 18# mirror template and needs to be set out according to the stair drawing before installation; The secondary back ribs (602) of the bottom mold are made of 60*80mm wood with a spacing of 250mm; the main back ribs (601) of the bottom mold are made of 100*100mm wood with a spacing of 1.3m; Before slotting the stair side formwork (604), slots are made according to the position and depth of the step template (608) and the supporting wood (609), and the step template (608) and the supporting wood (609) are fixed with steel nails; The secondary back ribs (606) of the side mold are two 60*80mm wooden squares, the main back ribs (605) of the side mold are two 50*100mm wooden squares, and the main back ribs (605) of the side mold are fixed with two M12 tension screws; The construction joint of the stair tread should be set on the tread within 1 / 3 of the end of the stair tread and perpendicular to the tread; S7. Since the stairwell is small and multiple stair sections need to be poured at the same time when pouring stair concrete, it is difficult for the pump pipe to penetrate into each stair section. Therefore, in this patent, a concrete pump pipe (7) is set as a device for transporting concrete from a pump truck to the working surface. The concrete pump pipe (7) is arranged on the M+1 floor rest platform template (505), and an inclined chute (8) is arranged at the position of the stairwell pipe well. The chute (8) is made of half a φ300mm PVC pipe and is fixed by connecting the scrap steel bars with the stair tread steel bars. The concrete enters the first to third run pouring surfaces through the concrete pump pipe (7) and the chute (8), completing the stair tread pouring construction from bottom to top.

Images