A high-altitude large-span cantilever platform jacking construction system and construction method

Abstract

The application discloses a high-altitude large-span cantilever platform pushing construction system and a construction method thereof, and relates to the field of construction technology.The construction system comprises a cantilever platform, a pushing sliding mechanism and an anchoring mechanism.The cantilever platform is composed of an I-beam main girder, a sub girder, a platform panel and a protective rail, the I-beam main girder at the inner side end of the cantilever platform extends beyond the sub girder and the platform panel and extends to the inner side of the structural floor, and the center of gravity of the cantilever platform is always located within the range of the structural floor.The pushing sliding mechanism comprises a sliding track beam arranged on the structural floor, an I-beam main girder is arranged on the top of the sliding track beam, and a pushing oil cylinder is arranged between the inner side end of the I-beam main girder and the sliding track beam.The anchoring mechanism anchors the sliding track beam on the structural floor and slides and clamps the I-beam main girder on the top of the sliding track beam.The application realizes efficient installation and disassembly of the cantilever platform by using a hydraulic synchronous pushing system, the assembly process is carried out indoors, there is no risk of high-altitude edge operation, and the personal safety of construction personnel is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of cantilever platforms, and in particular to a high-altitude large-span cantilever platform jacking construction system and a construction method thereof. Background Art

[0002] During building renovation or construction projects, cantilever platforms are often required for material storage, safety protection, and catching welding slag during subsequent processes. Conventional cantilever platforms are often installed using a tower crane. However, in building renovation projects, existing structures above the cantilever platform may interfere with the tower crane, making it impossible to install using a tower crane. If a tower crane is available, conventional cantilever platforms can be assembled on the ground and then hoisted to the designated location. However, if a tower crane is unavailable or unavailable, constructing a cantilever platform requires extending a cantilever steel beam from indoors, then constructing a secondary beam and laying wooden scaffolding on top of the beam. This installation process requires workers to work at height, which poses a high risk of falling objects. Furthermore, this construction method is only suitable for smaller cantilever platforms and is not suitable for large cantilever platforms. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-altitude large-span cantilever platform jacking construction system and a construction method thereof, so as to solve the technical problems described in the background technology.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] The jacking mechanism comprises a first anchor support and a second anchor support respectively arranged at the inner and outer ends of the sliding track beam, the first anchor support and the second anchor support anchor the sliding track beam to the structural floor and slide the I-beam main beam to the top of the sliding track beam.

[0006] The first fastening nut is threadably mounted on the first tensioning screw below the first lower anchor plate, above the first middle anchor plate, and above the first upper anchor plate, and presses and fixes the first lower anchor plate, the first middle anchor plate, and the first upper anchor plate.

[0007] The two cams are connected to each other via a plurality of latching plates, each of which is connected to the first and second latching plates at two ends respectively.

[0008] Preferably, the second anchor support includes a second lower anchor plate, a second middle anchor plate, a second upper anchor plate, a steel beam pad, a second tensioning screw and a second fastening nut. The second lower anchor plate and the second middle anchor plate are correspondingly arranged under the sliding track beam and are respectively close to the bottom surface of the structural beam and the top surface of the structural floor slab. A vertically extending second tensioning screw is respectively passed through the four corners of the two, and the second middle anchor plate is welded to the sliding track beam. The four second tensioning screws are symmetrically arranged on both sides of the I-beam main beam, and their top ends are slightly higher than the lower wing plate of the I-beam main beam and pass through the second The upper anchor plate, the second upper anchor plate includes two pieces parallel to each other, and the two second upper anchor plates are respectively arranged on both sides of the I-beam main beam, and their two ends are respectively sleeved on the two tension screws on the same side of the I-beam main beam, the inner plate surface is attached to the top surface of the lower wing plate of the I-beam main beam, and a steel beam pad is inserted between the outer plate surface and the second middle anchor plate, the second fastening nut is threadedly sleeved on the second tension screw below the second lower anchor plate, above the second middle anchor plate and above the second upper anchor plate, and the second lower anchor plate, the second middle anchor plate and the second upper anchor plate are pressed and fixed.

[0009] Preferably, anti-overturning plates are provided on both sides of the I-beam main beam, and the anti-overturning plates are in an inverted L-shape, with the vertical plates arranged close to the edge of the lower wing plate of the I-beam main beam, and the bottom of the vertical plates are welded and fixed to the first anchor support or the second anchor support, and the horizontal plates are vertically welded to the top of the vertical plates and arranged close to the top surface of the lower wing plate of the I-beam main beam.

[0010] Preferably, in order to prevent the I-beam main beam from being pushed excessively, a limiting clamp plate is provided at the inner end of the I-beam main beam. The limiting clamp plate is welded to the lower wing plates on both sides of the I-beam main beam, and the plate surface extends horizontally to the outside of the I-beam main beam, and the anti-overturning clamp plate is located on the sliding path of the limiting clamp plate.

[0011] Preferably, the pushing oil cylinder is connected to the hydraulic pump source system, and a pressure sensor and a stroke sensor are installed on the rod body to facilitate pressure and stroke monitoring of each pushing oil cylinder, and all pushing oil cylinders are synchronously pushed through a computer control system.

[0012] Preferably, in order to prevent scattered objects from falling from the gap between the cantilever platform and the structural floor, a footboard is provided through the structural floor inside the innermost sharing secondary beam, and the footboard blocks and closes the gap between the sharing secondary beam and the structural floor.

[0013] In addition, the present invention also provides a construction method for the above-mentioned high-altitude large-span cantilever platform jacking construction system, comprising the following steps:

[0014] Step 1: Lay the sliding track beam and the I-beam main beam on the top of the structural floor, and fix the sliding track beam and the I-beam main beam on the structural floor through the first anchor support and the second anchor support;

[0015] Step 2: Weld a first pair of movable lugs on the top of the I-beam main beam and install a push cylinder between the first anchor support and the movable lugs;

[0016] Step 3: Assemble the secondary beam, platform panel and guardrail of a cantilever platform on the outer side of the I-beam main beam;

[0017] Step 4: After the first span cantilever platform is assembled, the computer control system controls the jacking cylinders to perform synchronous jacking. The synchronous jacking is carried out step by step. The stroke of each jacking is no more than one jacking stroke of the jacking cylinder. After each jacking is completed, a pair of movable ear plates are welded on the top of the I-beam main beam and the next synchronous jacking is carried out.

[0018] Step 5: Repeat steps 3 to 4 until all span cantilever platforms are assembled and pushed into place;

[0019] Step 6: Open an operation hole on the platform panel above the second anchor support, and tighten the first fastening nut and the second fastening nut respectively to adjust the first anchor support and the second anchor support from the sliding clamping state to the compression anchoring state to lock and fix the I-beam main beam;

[0020] Step 7: After the cantilever platform service period is completed, loosen the first fastening nut and the second fastening nut again to adjust the first anchor support and the second anchor support from the compressed anchoring state to the sliding clamping state;

[0021] Step 8: Control each jacking cylinder to pull back synchronously through the computer control system, and remove the guardrails, platform panels and secondary beams of each span of the cantilevered platform one by one;

[0022] Step nine: After the guardrails, platform panels and secondary sharing beams of the cantilever platform are all pulled back and removed, gradually remove the jacking cylinder, the first anchor support, the second anchor support, the I-beam main beam and the sliding track beam, and store and organize the removed components for subsequent turnover use.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention utilizes a hydraulic synchronous jacking system to achieve efficient installation and disassembly of the cantilever platform. Installation and disassembly operations can be performed without the aid of a tower crane. There are no special requirements for the size of the cantilever platform to be constructed, making it applicable to a wider range of applications. Furthermore, the cantilever platform's span assembly process and the synchronous jacking process are performed alternately, greatly improving the efficiency of the cantilever platform installation and saving manpower and material resources.

[0025] 2. The assembly process of the present invention is completely carried out indoors, and there is no risk of working at high altitudes near edges, thus ensuring the personal safety of construction workers;

[0026] 3. The center of gravity of the cantilever platform of the present invention always falls on the structural floor before and after pushing, and the targeted structural design of the front and rear two anchor supports and the anti-overturning plate and the limit plate greatly reduces the overturning probability of the cantilever platform. On the basis of ensuring the stability of the cantilever platform structure, the convenience of assembling the cantilever platform and the comfort during use are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or other aspects and advantages of the present invention will become clearer and more easily understood through the detailed description made in conjunction with the following drawings, which are only illustrative and do not limit the present invention, wherein:

[0028] Figure 1 This is a structural schematic diagram of a high-altitude, large-span cantilever platform jacking construction system according to the present invention;

[0029] Figure 2This is a schematic cross-sectional view of a high-altitude, large-span cantilever platform jacking construction system according to the present invention;

[0030] Figure 3 This is a structural schematic diagram of the first anchor support of a high-altitude, large-span cantilever platform jacking construction system according to the present invention;

[0031] Figure 4 This is a structural schematic diagram of the second anchor support of a high-altitude, large-span cantilever platform jacking construction system according to the present invention;

[0032] Figure 5 The present invention provides a schematic diagram of the construction steps of an installation process for a high-altitude, large-span cantilever platform jacking construction system.

[0033] Figure markings: 1-structural floor, 2-structural beam, 3-sliding track beam, 4-I-beam main beam, 5-first anchor support, 501-first lower anchor plate, 502-first middle anchor plate, 503-first upper anchor plate, 504-first tension screw, 505-first fastening nut, 6-second anchor support, 601-second lower anchor plate, 602-second middle anchor plate, 603-second upper anchor plate, 604-steel beam pad, 605-second tension screw, 606-second fastening nut, 7-thrust support, 701-load-bearing arm plate, 702-reinforcement cross plate, 703-fixed ear plate, 8-movable ear plate, 9-thrust cylinder, 10-anti-overturning clamp, 11-limiting clamp, 12-connecting ear plate, 13-sharing secondary beam, 14-platform panel, 15-guardrail, 16-reinforced scissors support. DETAILED DESCRIPTION

[0034] Hereinafter, an embodiment of a high-altitude, large-span cantilever platform jacking construction system and a construction method thereof of the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention. They are all illustrative and exemplary and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims and description of this application, including technical solutions that adopt any obvious replacements and modifications to the embodiments described herein.

[0035] In the description of the present invention, it should be noted that the terms "top," "bottom," "upper," "middle," "lower," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] The drawings in this specification are schematic diagrams that assist in illustrating the concepts of the present invention and schematically illustrate the shapes of the various components and their interrelationships. Please note that to clearly illustrate the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0037] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments are only used to explain the present invention and are not intended to limit the scope of the present invention. Figures 1-5 , the preferred embodiments of the present invention are further described in detail:

[0038] like Figures 1-2 As shown, a preferred high-altitude large-span cantilever platform jacking construction system of the present invention includes a cantilever platform, a jacking sliding mechanism and an anchoring mechanism. The cantilever platform is assembled by an I-beam main beam 4, a sharing secondary beam 13, a platform panel 14 and a guardrail 15 in different spans. The I-beam main beam 4 is welded with connecting ear plates 12 at intervals in the abdominal cavity, and the sharing secondary beam 13 is fixedly installed on the connecting ear plates 12 by high-strength bolts. Reinforced scissors braces are welded between the I-beam main beam 4 and the sharing secondary beam 13 at the outer corner position. The outer end of the cantilever platform extends outside the structural floor 1, and the I-beam main beam 4 at the inner end exceeds the range of the sharing secondary beam 13 and the platform panel 14 and extends to the inner side of the structural floor 1, and its center of gravity is always within the range of the structural floor 1;

[0039] The pushing and sliding mechanism includes a plurality of sliding track beams 3 arranged at intervals on the structural floor 1, and the plurality of sliding track beams 3 are laid along the depth direction of the structural floor 1, and an I-beam main beam 4 is slidably arranged on the top of each sliding track beam, and a pushing oil cylinder 9 is provided between the inner end of each sliding track beam and the I-beam main beam 4, and the anchoring mechanism includes a first anchor support 5 and a second anchor support 6 respectively provided at the inner and outer ends of the sliding track beam 3, and the first anchor support 5 and the second anchor support 6 anchor the sliding track beam 3 on the structural floor 1 and slide the I-beam main beam 4 to the top of the sliding track beam 3;

[0040] like Figure 3As shown, the first anchor support 5 includes a first lower anchor plate 501, a first middle anchor plate 502, a first upper anchor plate 503, a first tension screw 504 and a first fastening nut 505. The first lower anchor plate 501 and the first middle anchor plate 502 are correspondingly arranged below the sliding track beam 3 and are respectively close to the bottom surface of the structural beam 2 and the top surface of the structural floor 1. A vertically extending first tension screw 504 is respectively passed through the four corners of the two, and the first middle anchor plate 502 is welded to the sliding track beam 3. The four first tension screws 504 are symmetrically arranged on both sides of the I-beam main beam 4. The top end is higher than the I-beam main beam 4 and passes through the first upper anchor plate 503. The first upper anchor plate 503 is provided with two parallel pieces. The two first upper anchor plates 503 both span the I-beam main beam 4 and are sleeved on the first tension screws 504 on both sides of the I-beam main beam 4. The first upper anchor plate 503 encloses the I-beam main beam 4 in the space enclosed by it, the first tension screws 504 and the sliding track beam 3. The first fastening nut 505 is threadedly sleeved on the first tension screws 504 below the first lower anchor plate 501, above the first middle anchor plate 502 and above the first upper anchor plate 503. The first lower anchor plate 501, the first middle anchor plate 502 and the first upper anchor plate 503 are pressed and fixed; the first middle anchor plate 502 between the two first upper anchor plates 503 is provided with a jacking support 7 that spans the I-beam main beam 4, and the jacking support 7 includes a load-bearing arm plate 701 correspondingly arranged on both sides of the I-beam main beam 4, the bottom ends of the two load-bearing arm plates 701 are welded to the first middle anchor plate 502, and the top ends of the two are correspondingly provided with a fixed ear plate 703, a reinforcing cross plate 702 is provided between the two fixed ear plates 703 and is connected to the jacking cylinder 9 through a pin shaft, The plate 702 is horizontally arranged above the I-beam main beam 4 and connects the two fixed ear plates 703 into one. The pushing oil cylinder 9 is connected to the hydraulic pump source system. The pressure sensor and stroke sensor are installed on its rod body. The end away from the fixed ear plate 703 is connected to the movable ear plate 8 welded in pairs on the top of the I-beam main beam 4 through a pin shaft. All the pushing oil cylinders 9 are synchronously pushed by a computer control system. The movable ear plates 8 are arranged in several pairs at intervals along the extension direction of the I-beam main beam 4, and the interval between two adjacent pairs of movable ear plates 8 is no greater than one pushing stroke of the pushing oil cylinder 9.

[0041] like Figure 4As shown, the second anchor support 6 includes a second lower anchor plate 601, a second middle anchor plate 602, a second upper anchor plate 603, a steel beam pad 604, a second tension screw 605 and a second fastening nut 606. The second lower anchor plate 601 and the second middle anchor plate 602 are correspondingly arranged below the sliding track beam 3 and are respectively close to the bottom surface of the structural beam 2 and the top surface of the structural floor 1. A vertically extending second tension screw 605 is respectively passed through the four corners of the two, and the second middle anchor plate 602 is welded to the sliding track beam 3. The four second tension screws 605 are symmetrically arranged on both sides of the I-beam main beam 4, and their top ends are higher than the lower wing plate of the I-beam main beam 4 and pass through the second upper anchor plate 6 03, the second upper anchor plate 603 includes two pieces parallel to each other, and the two second upper anchor plates 603 are respectively arranged on both sides of the I-beam main beam 4, and their two ends are respectively sleeved on the two tension screws 605 on the same side of the I-beam main beam 4, the inner plate surface thereof is attached to the top surface of the lower wing plate of the I-beam main beam 4, and a steel beam pad 604 is inserted between the outer plate surface thereof and the second middle anchor plate 602, the second fastening nut 606 is threadedly sleeved on the second tension screw 605 below the second lower anchor plate 601, above the second middle anchor plate 602 and above the second upper anchor plate 603, and presses and fixes the second lower anchor plate 601, the second middle anchor plate 602 and the second upper anchor plate 603;

[0042] In order to improve the anti-overturning ability of the cantilever platform, anti-overturning clips 10 are correspondingly provided on both sides of the I-beam main beam 4, and a limiting clip 11 is correspondingly provided on the inner end of the I-beam main beam 4. The anti-overturning clip 10 is in an inverted L-shape, and its vertical plate is arranged close to the edge of the lower wing plate of the I-beam main beam 4, and the bottom of its vertical plate is welded and fixed to the first middle anchor plate 502 or the second middle anchor plate 602, and its horizontal plate is vertically welded to the top of its vertical plate and is arranged close to the top surface of the lower wing plate of the I-beam main beam 4. The limiting clips 11 are correspondingly welded to the lower wing plates on both sides of the I-beam main beam 4, and its plate surface extends horizontally to the outside of the I-beam main beam 4, and the anti-overturning clip 10 is located on the sliding path of the limiting clip 11;

[0043] After the cantilever platform slides into place, in order to prevent scattered items from falling, a footboard is provided through the structural floor 1 inside the innermost sharing secondary beam 13, and the footboard blocks and closes the gap between the sharing secondary beam 13 and the structural floor 1.

[0044] like Figure 5 As shown, the present invention also provides a construction method of the above-mentioned high-altitude large-span cantilever platform jacking construction system, comprising the following steps:

[0045] Step 1: Lay the sliding track beam 3 and the I-beam main beam 4 on the top of the structural floor 1, and fix the sliding track beam 3 and the I-beam main beam 4 on the structural floor 1 through the first anchor support 5 and the second anchor support 6;

[0046] Step 2: Weld the first pair of movable lugs 8 on the top of the I-beam main beam 4 and install the jacking cylinder 9 between the fixed lug 703 of the jacking support 7 and the movable lug 8;

[0047] Step 3: Assemble the secondary beam 13, platform panel 14 and guardrail 15 of a cantilever platform on the outer end of the I-beam main beam 4;

[0048] Step 4: After the first span cantilever platform is assembled, the computer control system controls the jacking cylinders 9 to perform synchronous jacking. The synchronous jacking is carried out step by step. The jacking stroke of each jacking is no more than one jacking stroke of the jacking cylinder 9. After each jacking is completed, a pair of movable ear plates 8 are welded on the top of the I-beam main beam 4 and the next synchronous jacking is carried out.

[0049] Step 5: Repeat steps 3 to 4 until all span cantilever platforms are assembled and pushed into place;

[0050] Step 6: Open an operation hole at the platform panel 14 above the second anchor support 6, and hinge the platform panel 14 cut off at the operation hole to its original position to form a snap-on cover. Tighten the first fastening nut 505 at the top of the first upper anchor plate 503 and the second fastening nut 606 at the top of the second upper anchor plate 603 respectively, and adjust the first anchor support 5 and the second anchor support 6 from the sliding clamping state to the compression anchoring state to lock and fix the I-beam main beam 4;

[0051] Step 7: After the cantilever platform service period is over, loosen the first fastening nut 505 on the top of the first upper anchor plate 503 and the second fastening nut 606 on the top of the second upper anchor plate 603 respectively, and readjust the first anchor support 5 and the second anchor support 6 from the compressed anchoring state to the sliding clamping state;

[0052] Step 8: Control the jacking cylinders 9 to pull back synchronously through the computer control system, and remove the guardrails 15, platform panels 14 and secondary beams 13 of each span of the cantilevered platform one by one.

[0053] Step nine: After the guardrail 15, platform panel 14 and sharing secondary beam 13 of the cantilever platform are all pulled back and removed, gradually remove the push cylinder 9, the first anchor support 5, the second anchor support 6, the I-beam main beam 4 and the sliding track beam 3, and store and organize the removed components for subsequent turnover use.

[0054] 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 high-altitude, large-span cantilever platform jacking construction system, characterized by: The invention comprises a cantilever platform, a push-slide mechanism and an anchor mechanism, wherein the cantilever platform is assembled by spanning an I-beam main beam (4), a sharing secondary beam (13), a platform panel (14) and a guardrail (15), wherein the outer end of the cantilever platform extends beyond the structural floor (1), and the I-beam main beam (4) at the inner end thereof exceeds the range of the sharing secondary beam (13) and the platform panel (14) and extends to the inner side of the structural floor (1), and the center of gravity thereof is always located within the range of the structural floor (1). The push-slide mechanism comprises a plurality of sliding track beams (3) arranged at intervals on the structural floor (1). , a plurality of sliding track beams (3) are laid along the depth direction of the structural floor (1), and an I-beam main beam (4) is slidably arranged on the top of each of the sliding track beams, and a push cylinder (9) is arranged between the inner end of each of the sliding track beams and the I-beam main beam (4), and the anchoring mechanism includes a first anchoring support (5) and a second anchoring support (6) respectively arranged at the inner and outer ends of the sliding track beam (3), and the first anchoring support (5) and the second anchoring support (6) anchor the sliding track beam (3) on the structural floor (1) and slide the I-beam main beam (4) to the top of the sliding track beam (3); The first anchor support (5) includes a first lower anchor plate (501), a first middle anchor plate (502), a first upper anchor plate (503), a first tension screw (504) and a first fastening nut (505), wherein the first lower anchor plate (501) and the first middle anchor plate (502) are respectively arranged below the sliding track beam (3) and attached to the bottom surface of the structural beam (2) and the top surface of the structural floor (1), and a vertically extending first tension screw (504) is respectively passed through the four corners of the two, and the first middle anchor plate (502) is welded to the sliding track beam (3), and the four first tension screws (504) are symmetrically arranged on the I-beam main beam. (4) on both sides, the top of which is higher than the I-beam main beam (4) and passes through the first upper anchor plate (503), the first upper anchor plate (503) is arranged across the I-beam main beam (4) and closes the I-beam main beam (4) in the space surrounded by it, the first tension screw (504) and the sliding track beam (3), the first fastening nut (505) is threadedly sleeved on the first tension screw (504) below the first lower anchor plate (501), above the first middle anchor plate (502) and above the first upper anchor plate (503), and presses and fixes the first lower anchor plate (501), the first middle anchor plate (502) and the first upper anchor plate (503); The first upper anchor plate (503) is provided with two mutually parallel pieces, both of which span the I-beam main beam (4) and are sleeved on the first tension screws (504) on both sides of the I-beam main beam (4), and a jacking support (7) spanning the I-beam main beam (4) is provided on the first middle anchor plate (502) between the two, and the jacking support (7) includes a load-bearing arm plate (701) correspondingly provided on both sides of the I-beam main beam (4), the bottom ends of the two load-bearing arm plates (701) are welded to the first middle anchor plate (502), and the top ends of the two load-bearing arm plates are correspondingly provided with fixed ear plates (703), and the two A reinforcing transverse plate (702) is provided between the two fixed ear plates (703) and is connected to the jacking oil cylinder (9) through a pin shaft. The reinforcing transverse plate (702) is horizontally arranged above the I-beam main beam (4) and connects the two fixed ear plates (703) into one. The end of the jacking oil cylinder (9) away from the fixed ear plates (703) is connected to the movable ear plates (8) welded in pairs on the top of the I-beam main beam (4) through a pin shaft. The movable ear plates (8) are arranged in pairs along the extending direction of the I-beam main beam (4), and the interval between two adjacent pairs of movable ear plates (8) is not greater than one jacking stroke of the jacking oil cylinder (9).

2. The high-altitude, large-span cantilever platform jacking construction system according to claim 1 is characterized by: The second anchor support (6) includes a second lower anchor plate (601), a second middle anchor plate (602), a second upper anchor plate (603), a steel beam pad (604), a second tension screw (605) and a second fastening nut (606). The second lower anchor plate (601) and the second middle anchor plate (602) are respectively arranged below the sliding track beam (3) and are respectively close to the bottom surface of the structural beam (2) and the top surface of the structural floor (1). A vertically extending second tension screw (605) is respectively passed through the four corners of the two, and the second middle anchor plate (602) is welded to the sliding track beam (3). The four second tension screws (605) are symmetrically arranged on both sides of the I-beam main beam (4), and their top ends are higher than the lower wing plate of the I-beam main beam (4) and pass through the second upper anchor plate ( 603), the second upper anchor plate (603) includes two pieces parallel to each other, and the two second upper anchor plates (603) are respectively arranged on both sides of the I-beam main beam (4), and the two ends thereof are respectively sleeved on the two tension screws (605) on the same side of the I-beam main beam (4), the inner plate surface thereof is attached to the top surface of the lower wing plate of the I-beam main beam (4), and a steel beam pad (604) is inserted between the outer plate surface thereof and the second middle anchor plate (602), and the second fastening nut (606) is threadedly sleeved on the second tension screw (605) below the second lower anchor plate (601), above the second middle anchor plate (602) and above the second upper anchor plate (603), and presses and fixes the second lower anchor plate (601), the second middle anchor plate (602) and the second upper anchor plate (603).

3. The high-altitude, large-span cantilever platform jacking construction system according to claim 1 is characterized by: Anti-overturning plates (10) are correspondingly provided on both sides of the I-beam main beam (4). The anti-overturning plates (10) are in an inverted L-shape, with the vertical plates being arranged close to the edge of the lower wing plate of the I-beam main beam (4), and the bottom of the vertical plates being welded and fixed to the first anchor support (5) or the second anchor support (6), and the horizontal plates being vertically welded to the top of the vertical plates and being arranged close to the top surface of the lower wing plate of the I-beam main beam (4).

4. The high-altitude, large-span cantilever platform jacking construction system according to claim 3 is characterized by: A limit clamping plate (11) is correspondingly provided at the inner end of the I-beam main beam (4), and the limit clamping plate (11) is correspondingly welded to the lower wing plates on both sides of the I-beam main beam (4), and its plate surface extends horizontally to the outside of the I-beam main beam (4), and the anti-overturning clamping plate (10) is located on the sliding path of the limit clamping plate (11).

5. The high-altitude, large-span cantilever platform jacking construction system according to claim 1 is characterized by: The pushing oil cylinder (9) is connected to the hydraulic pump source system, and a pressure sensor and a stroke sensor are installed on the rod body thereof, and all the pushing oil cylinders (9) achieve synchronous pushing through a computer control system.

6. The high-altitude, large-span cantilever platform jacking construction system according to claim 1 is characterized by: A footboard is provided through the structural floor (1) on the inner side of the innermost sharing secondary beam (13), and the footboard blocks and closes the gap between the sharing secondary beam (13) and the structural floor (1).

7. A construction method based on the high-altitude large-span cantilever platform jacking construction system according to claim 1, characterized in that: The steps include: Step 1: laying a sliding track beam (3) and an I-steel main beam (4) on the top of the structural floor (1), and fixing the sliding track beam (3) and the I-steel main beam (4) on the structural floor (1) through a first anchor support (5) and a second anchor support (6); Step 2: Welding a first pair of movable lugs (8) on the top of the I-beam main beam (4) and installing a push cylinder (9) between the first anchor support (5) and the movable lugs (8); Step 3: Assemble a secondary beam (13), a platform panel (14) and a guardrail (15) of a cantilevered platform at the outer end of the I-beam main beam (4); Step 4: After the first span cantilever platform is assembled, the computer control system controls each jacking cylinder (9) to perform synchronous jacking, and the synchronous jacking is carried out step by step. Each jacking stroke is no more than one jacking stroke of the jacking cylinder (9). After each jacking is completed, a pair of movable ear plates (8) are welded on the top of the I-beam main beam (4) and the next synchronous jacking is carried out; Step 5: Repeat steps 3 to 4 until all span cantilever platforms are assembled and pushed into place; Step 6: Open an operation hole at the platform panel (14) above the second anchor support (6), and adjust the first anchor support (5) and the second anchor support (6) from the sliding clamping state to the compression anchoring state to lock and fix the I-beam main beam (4); Step seven, after the cantilever platform service period is completed, the first anchor support (5) and the second anchor support (6) are readjusted from the compressed anchoring state to the sliding clamping state; Step eight, controlling each jacking cylinder (9) to synchronously pull back through the computer control system, and removing the guardrails (15), platform panels (14) and sharing secondary beams (13) of each span of the cantilevered platform that has been pulled back one by one; Step nine, after the guardrail (15), platform panel (14) and sharing secondary beam (13) of the cantilever platform are all pulled back and removed, the jacking cylinder (9), the first anchor support (5), the second anchor support (6), the I-beam main beam (4) and the sliding track beam (3) are gradually removed, and the removed components are stored and sorted for subsequent turnover use.

Images