Segmented translation installation method for rotating steel ladder under restricted structure floor

Abstract

The present invention discloses a method for the segmented translation installation of a rotating steel ladder under a constrained structure floor, comprising the following steps: installing a guardrail and a hanger according to the designed position of the rotating steel ladder; fixing a vertical adjustment hoist on the hanger, and fixing a horizontal adjustment hoist on the floor height plate of the main building corresponding to each ladder section; segmenting the rotating steel ladder according to the design, and using a tower crane in conjunction with a vertical adjustment hoist and a horizontal adjustment hoist to sequentially lift the ladder sections of the first floor and the middle floor from bottom to top along the height direction of the rotating steel ladder; after the installation of the ladder sections of the first floor and the middle floor is completed, the last run of the top floor and the first run of the top floor are respectively installed, and after the installation is completed, the tower crane is used to vertically lift the middle run of the top floor, and fixedly connected with the first run and the last run of the ladder sections respectively. The present invention utilizes the horizontal adjustment hoist and the vertical adjustment hoist for matching lifting, so that the rotating steel ladder is segmented and translated into position for installation, thereby realizing the in-position installation of the rotating steel ladder.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a segmented translation installation method of a rotating steel ladder under a floor with a restricted structure. Background Art

[0002] With the needs of the development of the times, the pace of urban construction has gradually accelerated, which has also had a great impact on the development of the construction industry. More and more public buildings have become more and more beautiful in shape. In order to maintain the overall beauty and coordination of the project, while taking into account the characteristics of large traffic in public places, indoor pedestrian passages use steel spiral staircases with beautiful shape, high bearing capacity, light weight and can be quickly installed.

[0003] Steel spiral staircases are special-shaped spatial structures. Considering factors such as the production, transportation, and installation of steel spiral staircases, they need to be produced in sections. When the spiral steel ladder cannot be vertically hoisted due to the influence of the upper floor, and a support frame needs to be set up at the bottom to temporarily install and fix the steel ladder, the existing technology cannot solve the technical difficulties of construction. Therefore, a method for the segmented translation installation of a spiral steel ladder under a constrained structure floor is needed. Summary of the Invention

[0004] In order to overcome the defects of the existing technology center, the present invention provides a method for the segmented translation installation of a rotating steel ladder under a restricted structure floor. When the rotating steel staircase cannot be vertically lowered due to the influence of the structural floor, the rotating steel ladder can be installed in segments by tilting and translation by utilizing the horizontal adjustment + vertical adjustment hoist. The rotating steel ladder can be installed in place, which speeds up the installation construction process and shortens the installation period.

[0005] In order to achieve the above-mentioned object, the present invention provides a method for the segmented translation installation of a rotating steel ladder under a constrained structure floor, comprising:

[0006] During the civil construction process, temporary protective railings are installed on both sides of the designed position of the rotating steel ladder according to the designed position. At the same time, hangers are fixed on the top structural slab where the rotating steel ladder is located and on the first staircase from top to bottom along the height direction of the rotating steel ladder.

[0007] After the hanger is installed, a vertical adjustment hoist is fixed on the hanger, and at the same time, a horizontal adjustment hoist for diagonally pulling the stair section into place and fixing it is fixed on the floor height plate corresponding to each stair section;

[0008] Divide the rotating steel ladder into sections according to the design, and use a tower crane in conjunction with a vertical adjustment hoist and a horizontal adjustment hoist to sequentially hoist the first and middle floor sections from bottom to top along the height direction of the rotating steel ladder;

[0009] After the installation of the first and middle floor stair sections is completed, the last run of the top floor and the first run of the top floor are installed respectively. After the installation is completed, the middle run of the top floor is vertically lifted by a tower crane and fixedly connected to the first and last run of the stair sections respectively.

[0010] Preferably, the hanger includes an I-beam fixedly mounted on the side of the structural panel anti-ridge beam away from the structural panel, and two vertical adjustment hoists fixed and suspended at both ends of the I-beam along the length direction by steel wire ropes.

[0011] Preferably, an embedded plate is fixedly installed on the side of the anti-ridge beam away from the structural plate surface, the I-beam is fixedly welded to the embedded plate, and two suspension ears are fixedly installed on the I-beam corresponding to the two vertical adjustment hoists, and the vertical adjustment hoists are connected to the suspension ears through steel wire ropes.

[0012] Preferably, a mounting plate is fixedly installed on the ladder section beam at the starting end of the rotating steel ladder, and an adjustment ear plate is fixedly installed on the structural beam of the corresponding floor in the main building. Circular holes are correspondingly opened on the mounting plate and the adjustment ear plate, and bolts for fixedly connecting the ladder section at the starting end of the rotating steel ladder to the structural beam are inserted into the circular holes.

[0013] Preferably, both ends of the horizontal adjustment hoist are fixedly connected to the installation ladder section of the rotary steel ladder and the main building floor structure panel corresponding to the installation ladder section.

[0014] The two ends of the vertical adjustment hoist are respectively fixedly connected to the hanger and the installation ladder section of the rotary steel ladder.

[0015] Preferably, a rocker is fixedly mounted on a side of the second sprocket away from the connecting shaft.

[0016] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0017] 1) The technical problem of being unable to install a rotating steel ladder under a restricted floor structure is solved.

[0018] 2) There is no need to set up a full-height support frame at the lower part of the rotating steel ladder. The upper part is temporarily installed and fixed by a hand hoist, which saves investment in measures.

[0019] 3) Accelerated the installation and construction process and shortened the installation period. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of a three-dimensional model of a rotating steel ladder used in the segmented translation installation method of a rotating steel ladder under a constrained structure floor according to the present invention.

[0022] Figure 2 The figure is a schematic diagram of the positional relationship between the rotating steel ladder and the structural floor in the segmented translational installation method of the rotating steel ladder under the constrained structure floor of the present invention.

[0023] Figure 3 The present invention is a planar layout diagram of the hanger used in the segmented translation installation method of the rotating steel ladder under the constrained structure floor.

[0024] Figure 4 For attachment Figure 3 Cross-sectional view of the center hanger.

[0025] Figure 5 This is a schematic diagram of the installation of the lower node of the ladder section at the starting end of the 6th to 7th floor in the segmented translation installation method of the rotary steel ladder under the constrained structure floor of the present invention.

[0026] Figure 6 This is a schematic diagram of the position of the hand chain hoist when installing the first stair section between the 6th and 7th floors in the segmented translation installation method of the rotary steel ladder under the constrained structure floor of the present invention.

[0027] Figure 7 This is a schematic diagram of the position of the hand chain hoist when installing the first stair section between the 7th and 8th floors in the segmented translation installation method of the rotary steel ladder under the constrained structure floor of the present invention.

[0028] Figure 8 This is a schematic diagram of the position of the hand chain hoist when installing the first stair section between the 8th and 9th floors in the segmented translation installation method of the rotary steel ladder under the constrained structure floor of the present invention.

[0029] The corresponding relationship of the reference numbers in the accompanying drawings is as follows:

[0030] 1-revolving steel ladder; 2-outer edge of revolving steel ladder; 3-edge of 9th floor slab opening; 4-hanging bracket; 5-tower crane; 6-structural plate of 6th floor of main building; 7-structural plate of 7th floor of main building; 8-structural plate of 8th floor of main building; 9-structural plate of 9th floor of main building; 10-buried plate; 11-vertical adjustment hoist; 12-horizontal adjustment hoist; 13-hanging lug; 14-steel wire rope; 15-anti-ridge beam; 16-structural plate surface; 17-installation hanging plate; 18-round hole; 19-adjustment lug plate; 20-structural beam; 21-starting end ladder section; 22-I-beam. DETAILED DESCRIPTION

[0031] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0032] The technical problem to be solved by the present invention is that the existing installation method of the rotating steel ladder is that when the rotating steel ladder is under a restricted structure floor, the rotating steel ladder cannot be vertically hoisted due to the influence of the upper floor, and a supporting frame needs to be set up at the bottom to temporarily install and fix the rotating steel ladder, which cannot meet the requirements of hoisting construction. Instead, a segmented translation installation method for the rotating steel ladder under a restricted structure floor is proposed. Through the segmented oblique hoisting construction method, a steel bracket is set at the restricted floor position to realize the rotating steel ladder without setting up a full-floor support frame at the bottom and being segmented and obliquely hoisted into place from the floor position for installation, which speeds up the installation construction process, shortens the installation period, and improves the construction efficiency.

[0033] See also Figures 1-8 As shown, in a certain project, the rotating steel ladder 1 is located at the 6th to 9th floors in the area where the KF to KE axes intersect the K-12 to K-14 axes. Figure 1 The bid numbers 6, 7, 8 and 9 represent the 6th-floor structural plate, 7th-floor structural plate, 8th-floor structural plate and 9th-floor structural plate of the main building where the rotating steel ladder 1 is located. The outer diameter of the rotating steel ladder 1 is 6.5m, the inner diameter is 4.9m and the height is 15.094m. The entire rotating steel ladder 1 is divided into 7 runs and 6 rest platforms, of which 6th to 7th floors have 2 runs, 7th to 8th floors have 2 runs, and 8th to 9th floors have 3 runs. The main cross-section of the ladder beam is a box-type cross-section of 500*300 (width*height). H-shaped steel beams are embedded in the slabs of the 6th, 7th, 8th and 9th floors as the supporting nodes of the entire rotating steel ladder 1. The 9 top floors of the rotating steel ladder 1 are provided with structural sealing plates. At the same time, the outer edge line of the rotating steel ladder 1 is on the inner side of the outer edge line of the structure, as shown in the attached figure. Figure 2 shown.

[0034] See also Figures 1 to 8As shown, the present invention provides a method for the segmented translation installation of a rotating steel ladder under a constrained structure floor, comprising the following steps:

[0035] 1) Installation preparation and hanger setting

[0036] (1) During the civil construction process, according to the design position of the rotating steel ladder 1, temporary protective railings are installed on both sides of the stairs before all stair steps are installed. The railing height is 1.2m, and the vertical poles are made of φ48*3 steel pipes with a spacing of 600mm. Two cross bars are set, and the cross bars are made of 10-20mm round steel or steel bars.

[0037] (2) According to the installation sequence of the revolving steel ladder 1, the hanger 4 is fixedly installed on the top structural plate surface where the revolving steel ladder 1 is located and on the first turn ladder section from top to bottom along the height direction of the revolving steel ladder 1. It should be noted that the hanger 4 is considered in two parts here. One is to consider setting the hanger 4 on the 9-story structural plate 9 of the main building in the first turn from top to bottom. In addition, the second turn is to directly weld the hanging ears on the stairs on the first turn for hoist hanging. Preferably, the hanger 4 includes an I-beam 22 fixedly installed on the side of the anti-ridge beam 15 of the structural plate surface 16 away from the structural plate surface 16, and the anti-ridge beam 15 is fixedly installed on the side away from the structural plate surface 16 with an embedded plate 10. The hanger 4 is installed and fixed on the anti-ridge beam 15, and the embedded plate 10 is fixed after the 16mm diameter chemical anchor bolt is used to plant the reinforcement, and the I-beam 22 is welded and fixed to the embedded plate.

[0038] (3) After the hanger 4 is installed, a vertical adjustment hoist 11 is fixedly installed on the hanger 4, and at the same time, a horizontal adjustment hoist 12 is fixedly installed on the main building floor height plate corresponding to each installation ladder section. Preferably, the two ends of the vertical adjustment hoist are respectively fixedly connected to the hanger 4 and the installation ladder section of the rotating steel ladder to be installed, and the two ends of the horizontal adjustment hoist 12 are respectively fixedly connected to the installation ladder section of the rotating steel ladder 1 and the main building floor structure plate corresponding to the installation ladder section. Here, the weight of the vertical adjustment hoist 11 and the horizontal adjustment hoist 12 are both 5 tons The horizontal adjustment hoist 12 is used to adjust the horizontality of the installation ladder section. At the same time, the installation ladder section is diagonally pulled into place by cooperating with a main rope with a diameter of 32mm and a length of 12m as a diagonal rope. It should be noted that here, two vertical adjustment hoists 11 are suspended and fixed at both ends of the I-beam 22 along the length direction through a steel wire rope 14 with a diameter of 18mm, and two hanging ears 13 are fixedly installed on the corresponding two vertical adjustment hoists 11 on the I-beam 22. The vertical adjustment hoist 11 is connected to the hanging ear 13 through the steel wire rope 14.

[0039] 2) Install the first run of 6-7 layers

[0040] (1) Before lifting, connect two steel wire ropes with a diameter of 18mm and a length of 6m at the upper and lower positions of the outer ring of the installation ladder, and fix two 5-ton horizontal adjustment hoists 12 on the corresponding installation structure layer surface, which are fixed on the 6th floor structure plate 6 of the main building, as shown in the attached figure. Figure 6 shown.

[0041] (2) Slowly lower it through the opening on the 9th floor to a position approximately equal to the installation height, connect the two pre-set 6m long and 18mm diameter steel wire ropes to the two pre-set horizontal adjustment hoists 12 on the floor, and use the horizontal adjustment hoist 12 to slowly pull the installation ladder section closer to the installation position. The tower crane 5 cooperates and slowly lowers the hook to fix the node below the ladder section. Then adjust the plane position of the ladder section through the two horizontal adjustment hoists 12, and adjust the elevation of the ladder section through the tower crane 5 in conjunction with the vertical adjustment hoist 11. Then use the level and total station to check the elevation and horizontal position of the ladder section. After the deviation meets the requirements, weld the node below the ladder section.

[0042] (3) After the lower node of the ladder section is fixed, two 5-ton vertical adjustment hoists 11 are used to suspend and connect with the structural steel beams of the 7th floor structural plate 7 of the main building, and the tower crane 5 is unhooked.

[0043] It should be noted that, here, a mounting plate 17 is fixedly installed on the ladder section 21 beam at the starting end of the rotating steel ladder 1, and the size of the mounting plate 17 is 300mm*100mm*20mm (length*width*thickness). At the same time, an adjustment ear plate 19 is fixedly installed on the structural beam 20 of the corresponding floor in the main building, and the size of the adjustment ear plate 19 is 150mm*100mm*20mm (length*width*thickness). The mounting plate 17 and the adjustment ear plate 19 are both provided with corresponding circular holes 18. The circular holes 18 The diameter is 30mm, and a bolt is inserted into the circular hole 18 for fixing the starting end ladder section of the rotating steel ladder to the structural beam 20. At the same time, the bolt adopts a high-strength bolt with a strength grade of M20*70. It is hoisted by a tower crane 5. During hoisting, a main steel wire rope with a diameter of 32mm is connected to the hook on the tower crane 5. The installation ladder section is connected to the main rope on the tower crane 5 through 4 steel wire ropes with a diameter of 18mm and in conjunction with the horizontal adjustment hoist 12. The installation ladder section is leveled in advance with the horizontal adjustment hoist 12 during hoisting.

[0044] 3) Install 6-8 layer three runners

[0045] Similarly, install the remaining 3 runs of 6-8 layers.

[0046] 4) Install 8-9 layer three runners

[0047] (1) Install the last run from the 8th floor to the 9th floor first. During installation, lift it vertically through the tower crane at the 9th floor floor opening. Connect and fix the upper end of the installation ladder section to the structural steel beam of the 9th floor structural plate of the main building. Use two 5-ton vertical adjustment hoists 11 to hang and fix the lower end, and adjust the elevation and level. Use two horizontal adjustment hoists 12 to cooperate with the steel wire rope to connect one side to the 8th floor structural plate of the main building, and the other side to the 9th floor structural plate of the main building through the 9th floor floor opening. Figure 8 As shown, after the position of the ladder section is adjusted by the cooperation of the vertical adjustment hoist 11 and the horizontal adjustment hoist 12, the upper end is welded and fixed, and the vertical adjustment hoist 11 and the wire rope on both sides of the lower end are removed.

[0048] (2) Similarly, when installing the first run from the 8th floor to the 9th floor, due to height restrictions and a large inclined angle, the ladder section needs to be lowered to the lower stairs by a tower crane in advance, and then a hole with a diameter of 10 cm is opened at the 9th plate surface of the 9th floor structural plate of the main building. The main steel wire rope is lowered from the hole and connected to the hook for lifting into place. The drilling position needs to be determined before the first lifting, and the horizontal projection position of the main rope on the ladder section, and the hole position is determined according to the drawing.

[0049] (3) Install 8-9 layers of intermediate runners

[0050] Use a tower crane to vertically lift and install the middle run between the 8th and 9th floors. After adjusting the position, fold and secure this stair section with the first run between the 8th and 9th floors and the last run between the 8th and 9th floors.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A method for the segmented translation installation of a rotating steel ladder under a restricted structure floor, characterized in that: The following steps are involved: During the civil construction process, temporary protective railings are installed on both sides of the designed position of the rotating steel ladder according to the designed position. At the same time, hangers are fixed on the top structural slab where the rotating steel ladder is located and on the first staircase from top to bottom along the height direction of the rotating steel ladder. After the hanger is installed, a vertical adjustment hoist is fixed on the hanger, and at the same time, a horizontal adjustment hoist for diagonally pulling the stair section into place and fixing it is fixed on the floor height plate corresponding to each stair section; Divide the rotating steel ladder into sections according to the design, and use a tower crane in conjunction with a vertical adjustment hoist and a horizontal adjustment hoist to sequentially hoist the first and middle floor sections from bottom to top along the height direction of the rotating steel ladder; After the installation of the first and middle floor stair sections is completed, the last run of the top floor and the first run of the top floor are installed respectively. After the installation is completed, the middle run of the top floor is vertically lifted by a tower crane and fixedly connected to the first and last run of the stair sections respectively.

2. The method for installing a rotating steel ladder in sections and translating under a restricted structure floor according to claim 1, characterized in that: The hanger includes an I-beam fixedly mounted on a side of the structural plate anti-ridge beam away from the structural plate surface, and two vertical adjustment hoists fixed by steel wire ropes and suspended at both ends of the I-beam along the length direction.

3. The method for installing a rotating steel ladder in sections and translating under a restricted structure floor as claimed in claim 2, characterized in that: An embedded plate is fixedly installed on the side of the anti-ridge beam away from the structural plate surface, the I-beam is fixedly welded to the embedded plate, and two hanging ears are fixedly installed on the I-beam corresponding to the two vertical adjustment hoists, and the vertical adjustment hoists are connected to the hanging ears through steel wire ropes.

4. The method for installing a rotating steel ladder in sections and translating under a restricted structure floor according to claim 1, wherein: A mounting plate is fixedly installed on the ladder section beam at the starting end of the rotating steel ladder, and an adjustment ear plate is fixedly installed on the structural beam of the corresponding floor in the main building. Circular holes are correspondingly opened on the mounting plate and the adjustment ear plate, and bolts for fixing the ladder section at the starting end of the rotating steel ladder to the structural beam are inserted into the circular holes.

5. The method for installing a rotating steel ladder in sections and translating under a restricted structure floor as claimed in claim 1 is characterized in that: The two ends of the horizontal adjustment hoist are respectively fixedly connected to the installation ladder section of the rotary steel ladder and the main building floor structure plate surface corresponding to the installation ladder section.

6. The method for installing a rotating steel ladder in sections and translating under a restricted structure floor as claimed in claim 1 is characterized in that: The two ends of the vertical adjustment hoist are respectively fixedly connected to the hanger and the installation ladder section of the rotary steel ladder.

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