CN115749171A - UHPC (ultra high performance polycarbonate) assembled prefabricated staircase structure and construction method thereof - Google Patents
UHPC (ultra high performance polycarbonate) assembled prefabricated staircase structure and construction method thereof Download PDFInfo
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- CN115749171A CN115749171A CN202211638809.8A CN202211638809A CN115749171A CN 115749171 A CN115749171 A CN 115749171A CN 202211638809 A CN202211638809 A CN 202211638809A CN 115749171 A CN115749171 A CN 115749171A
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Abstract
The utility model relates to a UHPC assembled prefabricated staircase structure, it includes the steel ladder roof beam, down the steel ladder roof beam and a plurality of prefabricated unit mark time, the steel ladder roof beam of going up is installed on upper supporting platform, the steel ladder roof beam is installed on lower floor's supporting platform down, go up the steel ladder roof beam and all offer the terraced roof beam groove that is used for laying prefabricated unit and marks time with lower steel ladder roof beam on, it is used for marking time the fixed subassembly of fixing at terraced roof beam inslot with prefabricated unit all to be provided with on the steel ladder roof beam and the lower steel ladder roof beam, prefabricated unit still is provided with the coupling assembling that is used for fixed next prefabricated unit to mark time on marking time. This application has the effect that makes assembled stair more convenient in the construction installation.
Description
Technical Field
The application relates to the technical field of prefabricated buildings, in particular to a UHPC prefabricated staircase structure and a construction method thereof.
Background
The prefabricated building is a building which is formed by transferring a large amount of field operation work in the traditional construction mode to a factory, processing and manufacturing building components and accessories such as floor slabs, wall boards, stairs, balconies and the like in the factory, transporting the components and accessories to a building construction site, and assembling and installing the components and the accessories on the site in a reliable connection mode.
At present, when the assembled building stair is constructed, supporting platforms of floors are required to be built at construction positions, steel ladder beams are installed on the supporting platforms of two adjacent layers respectively, then the assembled stair is hoisted to a specified position through a tower crane, two ends of the assembled stair are clamped into ladder beam grooves of the steel ladder beams on the supporting platforms of the two adjacent layers respectively, and the two ends of the assembled stair are fixed with the steel ladder beams respectively, so that the construction of the assembled stair is completed.
However, the existing fabricated stairway is large in size and heavy in weight, and the fabricated stairway needs to leave a large enough construction space when being hoisted, so that the fabricated stairway is very inconvenient to hoist.
Disclosure of Invention
In order to solve the problem of inconvenient hoisting of the prefabricated stairway, the application provides a UHPC prefabricated stairway structure and a construction method thereof.
In a first aspect, the application provides a UHPC assembled prefabricated staircase structure, adopts following technical scheme:
the utility model provides a UHPC assembled prefabricated staircase structure, includes that steel ladder roof beam, lower steel ladder roof beam and a plurality of prefabricated unit mark time, steel ladder roof beam is installed on upper supporting platform, steel ladder roof beam is installed on lower supporting platform down, all offer the terraced roof beam groove that is used for laying prefabricated unit and marks time on steel ladder roof beam and the lower steel ladder roof beam, it all is provided with on steel ladder roof beam and the lower steel ladder roof beam and is used for marking time the fixed subassembly of fixing the prefabricated unit at terraced roof beam inslot, the prefabricated unit is marked time and is still be provided with the coupling assembling that is used for fixed next prefabricated unit to mark time.
By adopting the technical scheme, when the assembled building stair is constructed, an upper steel ladder beam and a lower steel ladder beam are respectively installed on upper and lower layers of supporting platforms, a plurality of prefabricated units are transported to a construction site, one prefabricated unit step is placed in a ladder beam groove of the lower steel ladder beam and is fixed through a fixing assembly, then the prefabricated units are sequentially assembled and fixed through a connecting assembly, and when the uppermost prefabricated unit step is placed in the ladder beam groove of the upper steel ladder beam, the uppermost prefabricated unit step is fixed in the ladder beam groove of the upper steel ladder beam through the fixing assembly, so that the assembled building stair is constructed; the prefabricated unit is divided into a plurality of prefabricated units for stepping, the prefabricated units can be transported in batches to be installed on site through the construction elevator, the limitation of tower crane hoisting is removed, and the prefabricated stairway is more convenient to construct and install.
Optionally, still include a supporting beam, a supporting beam is used for fixing on upper supporting platform, a spout has been seted up along a supporting beam's length direction on a supporting beam, it is provided with the slider to slide in the spout, it is used for preventing the gliding first mounting of slider to be provided with on the supporting beam, it is provided with the mounting bracket to slide along the horizontal direction on the slider, just the sliding direction perpendicular to a supporting beam's of mounting bracket length direction, be provided with on the mounting bracket and be used for preventing the gliding second mounting of slider, it sets up on the mounting bracket to go up the steel ladder roof beam.
Through adopting above-mentioned technical scheme, go up the deviation on the easy emergence position of steel ladder roof beam when the installation, slide on a supporting beam through promoting the slider, drive going up steel ladder roof beam and remove about, slide on the slider through ordering about the mount frame, drive going up steel ladder roof beam back-and-forth movement to adjust the horizontal position of going up steel ladder roof beam, the prefabricated unit of being convenient for is marked time and is gone up the butt joint of steel ladder roof beam.
Optionally, the mounting bracket is provided with a mounting groove along the vertical direction, the steel ladder beam slides along the vertical direction and is arranged in the mounting groove, and the mounting bracket is provided with a jacking assembly for jacking the steel ladder beam.
Through adopting above-mentioned technical scheme, order about steel ladder roof beam through the jacking subassembly and go up and down, adjust the ascending position of steel ladder roof beam vertical side, convenience when further improving prefabricated unit and marking time and steel ladder roof beam butt joint.
Optionally, the jacking subassembly includes jacking bolt and swivel nut, jacking bolt rotates and sets up on last steel ladder beam, just jacking bolt's axial is parallel with the slip direction of last steel ladder beam, the swivel nut is fixed to be set up in the mounting groove, just the swivel nut is parallel with the axial of jacking screw rod, the jacking screw rod is worn to locate the swivel nut and with swivel nut threaded connection.
By adopting the technical scheme, the jacking screw rod can be driven to move axially in the screw sleeve by rotating the jacking screw rod, and the upper steel ladder beam is driven to lift up and down.
Optionally, a grouting bag is arranged in the mounting groove, a grouting pipe is fixedly arranged on the mounting frame, and the grouting pipe is communicated with the grouting bag.
Through adopting above-mentioned technical scheme, the prefabricated unit of assembled stair is marked time and is accomplished the back with going up steel ladder roof beam butt joint, pours into cement mortar into in to the grout bag through the slip casting pipe, and cement mortar solidifies the back, supports going up steel ladder roof beam through cement mortar, increases assembled stair structure's stability.
Optionally, the connecting assembly includes a connecting frame, first bolts and second bolts, the precast unit step includes a horizontal section and a vertical section, the horizontal section and the vertical section are integrally formed, at least two first bolts are fixedly arranged on the bottom wall of the horizontal section, the second bolts are fixedly arranged on the side wall of the vertical section far away from the horizontal section, and nuts are respectively connected to the first bolts and the second bolts through threads;
the link is the Z shape, the link includes horizontal segment down, goes up the horizontal segment and indulges the section, the horizontal segment's diapire that the horizontal segment was marked time to the horizontal segment that the horizontal segment was used for the prefabricated unit of butt downside to mark time is used for down the horizontal segment, indulge the lateral wall that the vertical section that the section is used for the prefabricated unit of butt downside to mark time kept away from the horizontal segment, upward the horizontal segment is used for the diapire of the horizontal segment that the prefabricated unit of butt upside was marked time to go up the section, all offer the first through-hole that is used for supplying first bolt to pass down on horizontal segment and the last horizontal segment, offer the second through-hole that is used for supplying the second bolt to pass on the vertical segment.
Through adopting above-mentioned technical scheme, place the junction that the link was marked time at two adjacent prefabricated units, the diapire of the horizontal segment that the lower horizontal segment butt downside prefabricated unit of messenger's link was marked time, the lateral wall of the horizontal segment is kept away from to the vertical section that the vertical segment butt downside prefabricated unit of link was marked time, the diapire of the horizontal segment that the last horizontal segment butt of link was marked time of side system unit, and make the first bolt on the upper horizontal segment of both sides prefabricated unit was marked time about making insert respectively the first through-hole on horizontal segment and the last horizontal segment down, the second bolt on the vertical segment that makes the downside prefabricated unit mark time inserts the second through-hole on the vertical segment, later sheathe nut on first bolt and second bolt respectively and tighten, accomplish the connection of two adjacent prefabricated unit marks time and fix.
Optionally, a rib plate is arranged between the upper horizontal segment and the vertical segment.
Through adopting above-mentioned technical scheme, the last horizontal segment through the link mainly bears the load that comes from the prefabricated unit of upside and mark time, increases the stability of node between horizontal segment and the vertical section through the floor.
Optionally, the fixing assembly comprises a pressing strip and a third fixing piece, the bottom wall of the ladder beam groove is provided with an insertion hole for inserting a first bolt, two side walls of the ladder beam groove are provided with guide grooves communicated with the mounting groove, two sides of the pressing strip are arranged in the guide grooves in a sliding mode respectively, the pressing strip is used for compressing the top wall of the horizontal section, and the third fixing piece is used for preventing the pressing strip from sliding in the guide grooves.
Through adopting above-mentioned technical scheme, because be provided with two at least first bolts on the horizontal segment, the prefabricated unit is marked time when putting into the ladder roof beam groove, make the first bolt that does not participate in the link installation on the horizontal segment insert in the spliced eye, thereby prevent the prefabricated unit and mark time at ladder roof beam inslot horizontal migration, later, through the slip layering, make the layering compress tightly the roof of horizontal segment, and prevent the layering to slide in the guide way through the third mounting, thereby prevent the prefabricated unit and mark time at ladder roof beam inslot longitudinal sliding, thereby mark time with the prefabricated unit and fix in the ladder roof beam inslot of last steel ladder roof beam or lower steel ladder roof beam.
In a second aspect, the application provides a construction method of a UHPC assembled prefabricated staircase structure, which adopts the following technical scheme:
a construction method of a UHPC assembled prefabricated staircase structure comprises the following steps:
s1, mounting a lower steel ladder beam on a lower-layer supporting platform, and fixing a supporting beam on an upper-layer supporting platform;
s2, transporting the plurality of prefabricated unit steps to a construction site, placing one of the prefabricated unit steps in a ladder beam groove of a lower steel ladder beam, fixing the prefabricated unit steps through a fixing assembly, and then sequentially assembling and fixing the prefabricated unit steps through a connecting assembly;
s3, when the prefabricated unit step on the uppermost layer is in butt joint with the upper steel ladder beam, the upper steel ladder beam is driven to move left and right by pushing the sliding block to slide on the supporting beam, the mounting frame is driven to slide on the sliding block to drive the upper steel ladder beam to move back and forth, the sliding block is prevented from sliding through the first fixing piece, the sliding block and the mounting frame are prevented from sliding relatively through the second fixing piece, the horizontal position of the upper steel ladder beam is adjusted, the upper steel ladder beam is driven to lift through the jacking assembly, the position of the upper steel ladder beam in the vertical direction is adjusted, the prefabricated unit step is placed in a ladder beam groove of the upper steel ladder beam, and the prefabricated unit step on the uppermost layer is fixed in a ladder beam groove of the upper steel ladder beam through the fixing assembly;
and S4, cement mortar is injected into the grouting bag through the grouting pipe, and after the cement mortar is solidified, the upper steel ladder beam is supported through the cement mortar, so that the construction of the fabricated stair is completed.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the assembled type building stair is constructed, an upper steel ladder beam and a lower steel ladder beam are respectively installed on upper and lower layers of supporting platforms, a plurality of prefabricated unit steps are transported to a construction site, one prefabricated unit step is placed in a ladder beam groove of the lower steel ladder beam and fixed through a fixing assembly, then the prefabricated unit steps are sequentially assembled and fixed through a connecting assembly, and after the prefabricated unit step on the uppermost layer is placed in the ladder beam groove of the upper steel ladder beam, the prefabricated unit step on the uppermost layer is fixed in the ladder beam groove of the upper steel ladder beam through the fixing assembly, so that the assembled type stair construction is completed; the prefabricated staircase is split into a plurality of prefabricated unit steps, the prefabricated unit steps can be transported to a site for installation in batches through a construction elevator, the limitation of tower crane hoisting is removed, and the prefabricated staircase is more convenient to construct and install;
2. when the steel-climbing ladder beam is installed, position deviation is easy to occur, the steel-climbing ladder beam is driven to move left and right by pushing the sliding block to slide on the supporting beam, and the steel-climbing ladder beam is driven to move back and forth by driving the installation frame to slide on the sliding block, so that the horizontal position of the steel-climbing ladder beam is adjusted, and the prefabricated unit steps can be conveniently butted with the steel-climbing ladder beam;
3. the connecting frame is placed at the joint of the two adjacent prefabricated unit steps, the lower transverse section of the connecting frame is abutted to the bottom wall of the horizontal section of the lower prefabricated unit step, the vertical section of the lower prefabricated unit step is abutted to the vertical section of the lower prefabricated unit step of the connecting frame and is far away from the side wall of the horizontal section, the upper transverse section of the connecting frame is abutted to the bottom wall of the horizontal section of the upper prefabricated unit step, first bolts on the upper horizontal section of the upper prefabricated unit step and the lower prefabricated unit step are respectively inserted into first through holes on the lower transverse section and the upper transverse section, second bolts on the vertical section of the lower prefabricated unit step are inserted into second through holes on the vertical section, nuts are respectively sleeved on the first bolts and the second bolts and are screwed down, and the connection and fixation of the two adjacent prefabricated unit steps are completed.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;
FIG. 2 is an exploded view of a part of the structure of the embodiment of the present application, which is mainly used for expressing the mounting structure of the steel ladder beam;
FIG. 3 is an exploded view of the structure of the embodiment of the present application, which is mainly used for illustrating the installation relationship between the mounting frame and the upper steel ladder beam;
FIG. 4 is a partial schematic structural diagram of an embodiment of the present application, which is mainly used for expressing a schematic structural diagram of a connecting component;
FIG. 5 is a partial schematic structural diagram of an embodiment of the present application, which is mainly used for expressing the installation relationship between the prefabricated unit steps and the lower steel ladder beam.
Description of the reference numerals: 1. descending a steel ladder beam; 2. a support beam; 21. a chute; 22. a slider; 23. a support bar; 24. a first fixing member; 25. a first kidney-shaped groove; 3. a mounting frame; 31. a T-shaped slot; 32. a second fixing member; 33. a second kidney-shaped slot; 34. mounting grooves; 35. a guide cylinder; 36. grouting bags; 37. a grouting pipe; 4. going up a steel ladder beam; 41. a guide bar; 52. a vertical section; 5. prefabricating unit steps; 51. a horizontal segment; 6. a fixing assembly; 61. layering; 62. a third fixing member; 7. a connecting assembly; 71. a connecting frame; 711. a lower transverse section; 712. an upper transverse section; 713. a longitudinal section; 72. a first bolt; 73. a second bolt; 8. a jacking assembly; 81. jacking bolts; 82. a threaded sleeve.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses UHPC assembled prefabricated staircase structure. Referring to fig. 1, including fixed lower steel ladder beam 1 that sets up on lower floor's supporting platform, fixed a supporting beam 2 that sets up on upper supporting platform, slide and set up mounting bracket 3 on a supporting beam 2, slide upper steel ladder beam 4 that sets up on mounting bracket 3 along vertical direction, and a plurality of prefabricated unit 5 of marking time, ladder beam groove has all been seted up on upper steel ladder beam 4 and lower steel ladder beam 1, all be provided with the fixed subassembly 6 that is used for fixed prefabricated unit 5 of marking time on upper steel ladder beam 4 and the lower steel ladder beam 1, still be provided with the coupling assembling 7 that is used for fixed next prefabricated unit 5 of marking time on the prefabricated unit 5 of marking time.
Referring to fig. 1 and 2, two supporting beams 2 are provided, a lower steel ladder beam 1 and two supporting beams 2 are fixed on a supporting platform through bolts or directly welded on the supporting platform, when the lower steel ladder beam 1 and the supporting beams 2 are installed, the length directions of the lower steel ladder beam 1 and the supporting beams 2 need to be ensured to be horizontal, the two supporting beams 2 are located on the same horizontal plane, and the length directions of the two supporting beams 2 are parallel to the length direction of the lower steel ladder beam 1.
Referring to fig. 2, the top wall of two supporting beams 2 has all seted up spout 21 along a supporting beam 2's length direction, it is provided with two sliders 22 to slide respectively in two supporting beams 2's the spout 21, each slider 22 one-to-one on two supporting beams 2, and be fixed with bracing piece 23 on two mutually corresponding sliders 22 jointly, the length direction level of bracing piece 23 and the length direction of a supporting beam 2 of perpendicular to, and the length direction of two bracing pieces 23 is parallel, the cross-section of bracing piece 23 is the T shape, set up two and bracing piece 23 to the T-slot 31 of adaptation on the mounting bracket 3, and two T-slot 31's both ends all link up the lateral wall of mounting bracket 3, and two bracing pieces 23 are used for inserting in the two T-slot 31 of mounting bracket 3 respectively.
Referring to fig. 2, slider 22 all can be dismantled and set up in a supporting beam 2's spout 21, it is used for preventing gliding first mounting 24 of slider 22 to be provided with on a supporting beam 2, first mounting 24 includes first tight draw bolt, the first kidney slot 25 that communicates with spout 21 is all seted up along a supporting beam 2's length direction to the lateral wall of two supporting beams 2, the first screw hole with first tight draw bolt looks adaptation is all seted up to the lateral wall of each slider 22, place back in spout 21 when slider 22, first screw hole corresponds with first kidney slot 25 position.
Referring to fig. 2, a second fixing member 32 for preventing the sliding of the slider 22 is disposed on the mounting bracket 3, the second fixing member 32 includes a second tensioning bolt, two second slots 33 are respectively disposed on two sidewalls of the mounting bracket 3, one of the second slots 33 is communicated with one of the T-shaped slots 31, the other second slot 33 is communicated with the other T-shaped slot 31, a second threaded hole adapted to the second tensioning bolt is disposed on a sidewall of the support rod 23, and after the support rod 23 is inserted into the two T-shaped slots 31 on the mounting bracket 3, the second slot 33 corresponds to the second threaded hole.
After the supporting beams 2 are installed and fixed, the two supporting rods 23 are erected on the two supporting beams 2, the two sliding blocks 22 on the supporting rods 23 are arranged in the sliding grooves 21 of the two supporting beams 2 in a sliding mode respectively, the first tensioning bolt is inserted into the first threaded hole, the mounting frame 3 is erected on the two supporting rods 23, the two supporting rods 23 are inserted into the two T-shaped grooves 31 of the mounting frame 3 respectively, the second tensioning bolt is inserted into the second threaded hole, the upper steel ladder beam 4 is driven to move left and right by pushing the sliding blocks 22 to slide on the supporting beams 2, the mounting frame 3 is driven to slide on the supporting rods 23 to drive the upper steel ladder beam 4 to move back and forth, therefore, the horizontal position of the upper steel ladder beam 4 is adjusted, the prefabricated unit step 5 is conveniently abutted to the upper steel ladder beam 4, and after the position of the mounting frame 3 is adjusted, the mounting frame 3 can be fixed on the supporting beams 2 by screwing the first tensioning bolt and the second tensioning bolt.
Referring to fig. 2 and 3, an installation groove 34 is formed in the installation frame 3 in the vertical direction, the steel-feeding ladder beam 4 slides in the vertical direction and is arranged in the installation groove 34, two guide cylinders 35 are fixedly arranged on the bottom wall of the installation groove 34, the axial directions of the two guide cylinders 35 are vertical, two guide rods 41 are fixedly arranged on the bottom wall of the steel-feeding ladder beam 4, the length directions of the two guide rods 41 are vertical and correspond to the two guide cylinders 35 one to one, and the two guide rods 41 respectively slide and penetrate through the corresponding guide cylinders 35.
Referring to fig. 3, a jacking assembly 8 for jacking the upper steel ladder beam 4 is arranged on the mounting frame 3, the jacking assembly 8 comprises a jacking bolt 81 and a threaded sleeve 82, a mounting hole is formed in the bottom wall of the ladder beam groove along the vertical direction, a countersunk groove communicated with the mounting hole is further formed in the bottom wall of the ladder beam groove, a jacking screw rod penetrates through the mounting hole and is rotatably connected with the upper steel ladder beam 4, an annular block is fixedly arranged on the side wall of the jacking screw rod, an annular groove is formed in the side wall of the mounting hole, the annular block is rotatably arranged in the annular groove, the head of the jacking screw rod is positioned in the countersunk groove, the threaded sleeve 82 is fixedly arranged in the mounting groove 34, the threaded sleeve 82 is axially parallel to the jacking screw rod, and the jacking screw rod penetrates through the threaded sleeve 82 and is in threaded connection with the threaded sleeve 82; through rotating the jacking screw rod, can order about the jacking screw rod along axial displacement in swivel nut 82 to drive steel ladder beam 4 oscilaltion, adjust the ascending position in the vertical direction of steel ladder beam 4, the convenience when further improving prefabricated unit and marking time 5 and steel ladder beam 4 butt joint.
Referring to fig. 2 and 3, a grouting bag 36 is arranged in the mounting groove 34, a grouting pipe 37 is fixedly arranged on the mounting frame 3, the grouting pipe 37 is communicated with the grouting bag 36, and the grouting bag 36 is made of a PVC transparent plastic material; prefabricated unit of assembled stair 5 steps on the back with going up steel ladder beam 4 butt joint completion, injects cement mortar into grout bag 36 through slip casting pipe 37, and cement mortar solidifies the back, supports going up steel ladder beam 4 through cement mortar, increases assembled stair structure's stability.
Referring to fig. 4, the cross-section of prefabricated unit mark time 5 is the L shape, and the inside of prefabricated unit mark time 5 inlays and is equipped with the steel sheet of L shape, prefabricated unit mark time 5 includes horizontal segment 51 and vertical section 52, horizontal segment 51 and vertical section 52 integrated into one piece, coupling assembling 7 includes link 71, first bolt 72 and second bolt 73, the fixed four first bolts 72 that are provided with of diapire of horizontal segment 51, the one end of first bolt 72 is pre-buried in horizontal segment 51 and with the steel sheet welding, vertical section 52 is kept away from on the lateral wall of horizontal segment 51 and fixedly is provided with two second bolts 73, the one end of two second bolts 73 is pre-buried in vertical section 52 and with the steel sheet welding, equal threaded connection has the nut on first bolt 72 and the second bolt 73.
Referring to fig. 4, the connecting frame 71 is Z-shaped, the connecting frame 71 includes a lower horizontal section 711, an upper horizontal section 712 and a vertical section 713, the lower horizontal section 711 is used for abutting against the bottom wall of the horizontal section 51 of the lower prefabricated unit step 5, the vertical section 713 is used for abutting against the side wall of the vertical section 52 of the lower prefabricated unit step 5 far away from the horizontal section 51, the upper horizontal section 712 is used for abutting against the bottom wall of the horizontal section 51 of the upper prefabricated unit step 5, two first through holes for the first bolt 72 to pass through are respectively formed in the lower horizontal section 711 and the upper horizontal section 712, two second through holes for the second bolt 73 to pass through are formed in the vertical section 713, and a rib plate is arranged between the upper horizontal section 712 and the vertical section 713.
The connecting frame 71 is placed at the connecting position of two adjacent prefabricated unit steps 5, the lower transverse section 711 of the connecting frame 71 is abutted against the bottom wall of the horizontal section 51 of the lower prefabricated unit step 5, the longitudinal section 713 of the connecting frame 71 is abutted against the side wall, far away from the horizontal section 51, of the vertical section 52 of the lower prefabricated unit step 5, the upper transverse section 712 of the connecting frame 71 is abutted against the bottom wall of the horizontal section 51 of the upper prefabricated unit step, two first bolts 72 on the horizontal sections 51 of the upper prefabricated unit step 5 and the lower prefabricated unit step 5 are respectively inserted into two corresponding first through holes in the lower transverse section 711 and the upper transverse section 712, two second bolts 73 on the vertical section 52 of the lower prefabricated unit step 5 are inserted into two corresponding second through holes in the longitudinal section 713, and then the first bolts 72 and the second bolts 73 are respectively sleeved with nuts and screwed, so that the connection and fixation of the two adjacent prefabricated unit steps 5 are completed.
Referring to fig. 2 and 5, the fixing assembly 6 includes a pressing bar 61 and a third fixing member 62, two insertion holes for inserting the first bolts 72 are respectively provided on the bottom walls of the upper ladder beam grooves of the upper steel ladder beam 4 and the lower steel ladder beam 1, guide grooves communicated with the mounting groove 34 are respectively provided on two side walls of the ladder beam grooves along the vertical direction, two sides of the pressing bar 61 are respectively slidably disposed in the two guide grooves, the pressing bar 61 is used for pressing the top wall of the horizontal section 51, and when the uppermost prefabricated unit step 5 is assembled and spliced with the upper steel ladder beam 4, the second bolt 73 on the vertical section 52 can be firstly cut off, or when the prefabricated unit step 5 is prefabricated in a factory, the second bolt 73 is not pre-buried in the vertical section 52 of one of the prefabricated units 5.
Referring to fig. 5, the third fixing member 62 includes a third bolt, fixing plates are fixedly disposed on both sides of the pressing bar 61, third through holes for the third bolt to pass through are provided on the two fixing plates, third threaded holes adapted to the third bolt are provided on both side walls of the ladder beam groove, and the third through holes are aligned to the third threaded holes after the pressing bar 61 abuts against the top wall of the horizontal section 51.
When the precast unit steps 5 are assembled, two first bolts 72 are respectively arranged on the horizontal sections 51 of the two precast unit steps 5 positioned at the most lateral side and do not participate in the installation of the connecting frames 71, and the two precast unit steps 5 positioned at the most lateral side need to be respectively arranged in the ladder beam grooves of the upper steel ladder beam 4 and the lower steel ladder beam 1, when the precast unit steps 5 are arranged in the ladder beam grooves, the two first bolts 72 which do not participate in the installation of the connecting frames 71 on the horizontal sections 51 are inserted into the two inserting holes, so that the horizontal movement of the precast unit steps 5 in the ladder beam grooves is effectively prevented, then, the pressing strips 61 are pressed against the top walls of the horizontal sections 51 through sliding of the pressing strips 61, and then, the third bolts penetrate through the third through holes and are inserted into the third threaded holes, so that the precast unit steps 5 are prevented from longitudinally sliding in the ladder beam grooves, and the precast unit steps 5 are fixed in the ladder beam grooves of the upper steel ladder beam 4 or the lower steel ladder beam 1.
The implementation principle of a UHPC assembled prefabricated staircase structure of the embodiment of this application is: when the assembled building stair is constructed, the lower steel stair beam 1 is fixed on the lower layer supporting platform through bolts, the two supporting beams 2 are fixed on the upper layer supporting platform through bolts, the two supporting rods 23 are erected on the two supporting beams 2, the two sliding blocks 22 on the supporting rods 23 are arranged in the sliding grooves 21 of the two supporting beams 2 in a sliding mode respectively, the first tensioning bolt is inserted into the first threaded hole, the mounting frame 3 is erected on the two supporting rods 23, the two supporting rods 23 are inserted into the two T-shaped grooves 31 of the mounting frame 3 respectively, and the second tensioning bolt is inserted into the second threaded hole.
The method comprises the steps of transporting a plurality of prefabricated units 5 to a construction site, placing one of the prefabricated units 5 in a ladder beam groove of a lower steel ladder beam 1, respectively inserting two first bolts 72 positioned on the lateral side of a horizontal section 51 of the prefabricated unit step 5 into two inserting holes in the lower steel ladder beam 1, then sliding a pressing strip 61 on the lower steel ladder beam 1 to enable the pressing strip 61 to press the top wall of the horizontal section 51, penetrating a third bolt through a third through hole and inserting the third bolt into a third threaded hole, and fixing the prefabricated unit step 5 in the ladder beam groove of the lower steel ladder beam 1.
Assembling another prefabricated unit step 5 above the assembled prefabricated unit steps 5, placing a connecting frame 71 at the joint of two adjacent prefabricated unit steps 5, enabling a lower transverse section 711 of the connecting frame 71 to abut against the bottom wall of a horizontal section 51 of the lower prefabricated unit step 5, enabling a longitudinal section 713 of the connecting frame 71 to abut against the side wall, far away from the horizontal section 51, of a vertical section 52 of the lower prefabricated unit step 5, enabling an upper transverse section 712 of the connecting frame 71 to abut against the bottom wall of the horizontal section 51 of the upper prefabricated unit step, enabling two first bolts 72 on the horizontal sections 51 of the upper prefabricated unit step 5 and the lower prefabricated unit step 5 to be respectively inserted into two corresponding first through holes on the lower transverse section 711 and the upper transverse section 712, enabling two second bolts 73 on the vertical section 52 of the lower prefabricated unit step 5 to be inserted into two second through holes on the longitudinal section 713, then respectively sleeving and screwing nuts on the first bolts 72 and the second bolts 73 to complete the connection and fixation of the two adjacent prefabricated unit steps 5, and then repeating the above steps to assemble the rest prefabricated unit steps 5.
When the prefabricated unit of the superiors is marked 5 and is docked with steel ladder roof beam 4, promote slider 22 and slide on a supporting beam 2, it removes about driving steel ladder roof beam 4, slide on bracing piece 23 through ordering about mounting bracket 3, drive steel ladder roof beam 4 back-and-forth movement, adjust the horizontal position of steel ladder roof beam 4, after mounting bracket 3 position adjustment, through screwing up first tie bolt and the tight tie bolt of second, fix mounting bracket 3 on a supporting beam 2, through rotating the jacking screw rod, order about the jacking screw rod along axial displacement in swivel nut 82, and drive steel ladder roof beam 4 oscilaltion, adjust the position on the vertical side of steel ladder roof beam 4.
After the uppermost prefabricated unit step 5 is placed in the ladder beam groove of the upper steel ladder beam 4, the uppermost prefabricated unit step 5 is fixed in the ladder beam groove of the upper steel ladder beam 4 through the fixing assembly 6, cement mortar is injected into the grouting bag 36 through the grouting pipe 37, and after the cement mortar is solidified, the upper steel ladder beam 4 is supported through the cement mortar, so that the construction of the fabricated stairway is completed; the prefabricated unit is disassembled into the prefabricated units to be marked 5, the prefabricated units are marked 5 and can be transported to the field for installation in batches through the construction elevator, the limitation of tower crane hoisting is removed, and the prefabricated stairway is convenient to construct and install.
The embodiment of the application also discloses a construction method of the UHPC assembled prefabricated staircase structure, which comprises the following steps:
s1, fixing a lower steel ladder beam 1 on a lower-layer supporting platform through bolts, fixing two supporting beams 2 on an upper-layer supporting platform through bolts, ensuring that the length directions of the lower steel ladder beam 1 and the supporting beams 2 are horizontal, enabling the two supporting beams 2 to be located on the same horizontal plane, enabling the length directions of the two supporting beams 2 to be parallel to the length direction of the lower steel ladder beam 1, erecting two supporting rods 23 on the two supporting beams 2, enabling two sliding blocks 22 on the supporting rods 23 to be arranged in sliding grooves 21 of the two supporting beams 2 in a sliding mode respectively, inserting a first tensioning bolt into a first threaded hole, erecting a mounting frame 3 on the two supporting rods 23, enabling the two supporting rods 23 to be inserted into two T-shaped grooves 31 of the mounting frame 3 respectively, and inserting a second tensioning bolt into a second threaded hole;
s2, transporting a plurality of prefabricated unit steps 5 to a construction site, placing one of the prefabricated unit steps 5 in a ladder beam groove of a lower steel ladder beam 1, inserting two first bolts 72 positioned at the edge side on a horizontal section 51 of the prefabricated unit step 5 into two inserting holes on the lower steel ladder beam 1 respectively, sliding a pressing strip 61 on the lower steel ladder beam 1 to enable the pressing strip 61 to press the top wall of the horizontal section 51, penetrating a third bolt through a third through hole and inserting the third bolt into a third threaded hole, fixing the prefabricated unit step 5 in the ladder beam groove of the lower steel ladder beam 1, assembling another prefabricated unit step 5 above the assembled prefabricated unit step 5, placing a connecting frame 71 at the connection position of two adjacent prefabricated unit steps 5, enabling a lower transverse section 711 of the connecting frame 71 to abut against the bottom wall of the horizontal section 51 of the lower prefabricated unit step 5, abutting against a vertical section 52 of the lower prefabricated unit step 5 away from the side wall of the horizontal section 51, abutting against an upper horizontal section 712 of the upper prefabricated unit step 5, inserting the upper transverse section of the second bolt 72 into the upper transverse section of the prefabricated unit step 5 and the upper transverse section 712 of the second transverse section of the prefabricated unit step 5, and screwing the prefabricated unit step 5 into the upper transverse section 712, respectively, and the prefabricated unit step 73, and screwing the prefabricated units 73 on the two prefabricated units 73 after the prefabricated units 73;
s3, when the prefabricated unit step 5 on the uppermost layer is in butt joint with the upper steel ladder beam 4, the sliding block 22 is pushed to slide on the supporting beam 2 to drive the upper steel ladder beam 4 to move left and right, the mounting frame 3 is driven to slide on the supporting rod 23 to drive the upper steel ladder beam 4 to move back and forth, the horizontal position of the upper steel ladder beam 4 is adjusted, after the position of the mounting frame 3 is adjusted, the mounting frame 3 is fixed on the supporting beam 2 by screwing the first tensioning bolt and the second tensioning bolt, the jacking screw rod is driven to move axially in the threaded sleeve 82 by rotating the jacking screw rod, the upper steel ladder beam 4 is driven to lift up and down, the position of the upper steel ladder beam 4 in the vertical direction is adjusted, and after the prefabricated unit step 5 on the uppermost layer is placed in the ladder beam groove of the upper steel ladder beam 4, the prefabricated unit step 5 on the uppermost layer is fixed in the ladder beam groove of the upper steel ladder beam 4 through the fixing assembly 6;
and S4, injecting cement mortar into the grouting bag 36 through the grouting pipe 37, and after the cement mortar is solidified, supporting the upper steel ladder beam 4 through the cement mortar to complete the construction of the fabricated stairway.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides a UHPC assembled prefabricated staircase structure which characterized in that: including last steel ladder roof beam (4), lower steel ladder roof beam (1) and a plurality of prefabricated unit (5) of marking time, go up steel ladder roof beam (4) and install on upper supporting platform, install on lower floor's supporting platform steel ladder roof beam (1) down, go up steel ladder roof beam (4) and all offer the ladder roof beam groove that is used for laying prefabricated unit (5) of marking time down on steel ladder roof beam (1) down, go up steel ladder roof beam (4) and all be provided with on steel ladder roof beam (1) down and be used for marking time (5) with prefabricated unit and fix fixed subassembly (6) at ladder roof beam inslot, still be provided with coupling assembling (7) that are used for fixed next prefabricated unit (5) of marking time on prefabricated unit (5).
2. A UHPC fabricated prefabricated staircase structure according to claim 1, characterized in that: still include a supporting beam (2), a supporting beam (2) are used for fixing on upper supporting platform, a supporting beam (2) is gone up and has been seted up spout (21) along the length direction of a supporting beam (2), it is provided with slider (22) to slide in spout (21), be provided with on a supporting beam (2) and be used for preventing gliding first mounting (24) of slider (22), it is provided with mounting bracket (3) to slide along the horizontal direction on slider (22), just the length direction of a sliding direction perpendicular to a supporting beam (2) of mounting bracket (3), be provided with on mounting bracket (3) and be used for preventing gliding second mounting (32) of slider (22), go up steel ladder roof beam (4) and set up on mounting bracket (3).
3. A UHPC fabricated prefabricated staircase structure according to claim 2, characterized in that: mounting bracket (3) are gone up and have been seted up mounting groove (34) along vertical direction, go up steel ladder roof beam (4) and slide along vertical direction and set up in mounting groove (34), be provided with jacking subassembly (8) that are used for jacking steel ladder roof beam (4) on mounting bracket (3).
4. A UHPC fabricated prefabricated staircase structure according to claim 3, characterized in that: jacking subassembly (8) include jacking bolt (81) and swivel nut (82), jacking bolt (81) rotate to set up on last steel ladder beam (4), just the axial of jacking bolt (81) is parallel with the slip direction of last steel ladder beam (4), swivel nut (82) are fixed to be set up in mounting groove (34), just swivel nut (82) and the axial direction parallel of jacking screw rod, the jacking screw rod is worn to locate swivel nut (82) and with swivel nut (82) threaded connection.
5. A UHPC fabricated prefabricated staircase structure according to claim 3, characterized in that: a grouting bag (36) is arranged in the mounting groove (34), a grouting pipe (37) is fixedly arranged on the mounting frame (3), and the grouting pipe (37) is communicated with the grouting bag (36).
6. A UHPC fabricated prefabricated staircase structure according to claim 1, wherein: the connecting assembly (7) comprises a connecting frame (71), first bolts (72) and second bolts (73), the prefabricated unit step (5) comprises a horizontal section (51) and a vertical section (52), the horizontal section (51) and the vertical section (52) are integrally formed, at least two first bolts (72) are fixedly arranged on the bottom wall of the horizontal section (51), the second bolts (73) are fixedly arranged on the side wall, far away from the horizontal section (51), of the vertical section (52), and nuts are in threaded connection with the first bolts (72) and the second bolts (73);
link (71) are the Z shape, link (71) include horizontal segment (711), last horizontal segment (712) and indulge section (713) down, horizontal segment (711) are used for butt the diapire of horizontal segment (51) that the prefabricated unit of downside was marked time (5), indulge section (713) and be used for butt the vertical section (52) that the prefabricated unit of downside was marked time (5) to keep away from the lateral wall of horizontal segment (51), it is used for butt the diapire of horizontal segment (51) that the prefabricated unit of upside was marked time (5) to go up horizontal segment (712), all offer the first through-hole that is used for supplying first bolt (72) to pass on horizontal segment (711) and the last horizontal segment (712), offer the second through-hole that is used for supplying second bolt (73) to pass on indulging section (713).
7. A UHPC fabricated prefabricated staircase structure as claimed in claim 6, wherein: and a rib plate is arranged between the upper transverse section (712) and the longitudinal section (713).
8. A UHPC fabricated prefabricated staircase structure as claimed in claim 6, wherein: the fixing assembly (6) comprises a pressing strip (61) and a third fixing piece (62), inserting holes for inserting the first bolts (72) are formed in the bottom wall of the ladder beam groove, guide grooves communicated with the mounting groove (34) are formed in the two side walls of the ladder beam groove, the two sides of the pressing strip (61) are arranged in the guide grooves in a sliding mode respectively, the pressing strip (61) is used for pressing the top wall of the horizontal section (51), and the third fixing piece (62) is used for preventing the pressing strip (61) from sliding in the guide grooves.
9. The construction method of the UHPC assembled prefabricated staircase structure of claim 5, characterized in that the method comprises the following steps:
s1, mounting a lower steel ladder beam (1) on a lower-layer supporting platform, and fixing a supporting beam (2) on an upper-layer supporting platform;
s2, transporting a plurality of prefabricated unit steps (5) to a construction site, placing one of the prefabricated unit steps (5) in a ladder beam groove of a lower steel ladder beam (1), fixing the prefabricated unit steps (5) through a fixing assembly (6), and then sequentially assembling and fixing the prefabricated unit steps (5) through a connecting assembly (7);
s3, when the prefabricated unit step (5) on the uppermost layer is in butt joint with the upper steel ladder beam (4), the upper steel ladder beam (4) is driven to move left and right by pushing the sliding block (22) to slide on the supporting beam (2), the upper steel ladder beam (4) is driven to move back and forth by driving the mounting frame (3) to slide on the sliding block (22), the sliding block (22) is prevented from sliding by the first fixing piece (24), the sliding block (22) and the mounting frame (3) are prevented from sliding relatively by the second fixing piece (32), the horizontal position of the upper steel ladder beam (4) is adjusted, the upper steel ladder beam (4) is driven to lift by the jacking assembly (8), the position of the upper steel ladder beam (4) in the vertical direction is adjusted, so that the prefabricated unit step (5) is placed in a ladder beam groove of the upper steel ladder beam (4), and the prefabricated unit step (5) on the uppermost layer is fixed in the ladder beam groove of the upper steel ladder beam (4) by the fixing assembly (6);
and S4, injecting cement mortar into the grouting bag (36) through the grouting pipe (37), and after the cement mortar is solidified, supporting the steel stair ascending beam (4) through the cement mortar to complete the construction of the fabricated stair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211638809.8A CN115749171A (en) | 2022-12-20 | 2022-12-20 | UHPC (ultra high performance polycarbonate) assembled prefabricated staircase structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211638809.8A CN115749171A (en) | 2022-12-20 | 2022-12-20 | UHPC (ultra high performance polycarbonate) assembled prefabricated staircase structure and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115749171A true CN115749171A (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211638809.8A Pending CN115749171A (en) | 2022-12-20 | 2022-12-20 | UHPC (ultra high performance polycarbonate) assembled prefabricated staircase structure and construction method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN115749171A (en) |
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- 2022-12-20 CN CN202211638809.8A patent/CN115749171A/en active Pending
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