CN206174437U - Be applied to gallows of super high overlength cantilevered member construction - Google Patents

Abstract

The utility model provides a hanger used in the construction of super high and super long cantilevered components, which belongs to the technical field of construction engineering. Wall; the edge of the suspended floor frame extends outwards and is fixedly provided with a horizontal main beam for external exploration, and a diagonally braced suspension beam is installed between the parapet and the main beam for external exploration, and the frame of the parapet and the suspended floor frame A reinforced support beam is erected between the beams; a support member is provided at the lower part of the diagonally braced suspension beam; and a ladder scaffold is provided below the support member. The hanger applied to the construction of ultra-high and ultra-long overhanging components has less construction influence surface, flexible construction and high safety factor. Compared with the hanging basket, the safety factor is much higher. The stability of the frame is good. After the hanger is installed, the overall performance is good and the stability is strong.

Description

A hanger applied to the construction of super high and super long cantilevered components

technical field

The utility model relates to the technical field of construction engineering, in particular to a hanger used in the construction of superhigh and superlong cantilever components.

Background technique

Generally, with the vigorous development of on-site construction, the shape of the building changes with each passing day, and the difficulty of construction gradually increases. In order to highlight the architectural aura and highlight the status of the building, some buildings design a "roof hat" shape on the roof.

The use of ordinary steel pipe floor/cantilever scaffolding can solve the construction of some cantilevered components. When the cantilevered components are long and the elevation is high, ordinary steel pipe scaffolding has great limitations.

The length of the cantilever structure of the cantilevered components of this project is 3.8 meters, the length of the decorative cantilever is 4.8 meters, and the elevation of the top of the cantilevered finish is 42.95 meters from the outdoor ground.

Existing floor-mounted scaffolding increases the number of poles, and at the same time needs to organize expert demonstrations, and the amount of materials is huge.

The existing cantilevered scaffolding, after special calculation, has a larger model of cantilevered I-beam, which has a greater potential safety hazard.

At present, the climbing car is used for component installation, but the climbing car is greatly affected by the site, component load, and the number of personnel.

Contents of the invention

The technical task of the utility model is to solve the deficiencies of the prior art and provide a hanger applied to the construction of superhigh and superlong cantilever components.

The technical scheme of the utility model is realized in the following manner. The hanger applied to the construction of super high and super long cantilevered components has a structure including a suspended floor frame fixed above the top floor of the building,

A parapet is built on the edge of the top floor of the building;

The edge of the suspended floor frame extends outward and is fixedly provided with a horizontal main girder for external exploration.

Diagonal bracing suspension beams are installed obliquely between the parapet wall and the main girder of the external exploration.

Reinforcement support beams are erected between the parapet and the frame beams of the suspended floor frame;

The ends of the diagonally braced suspension beams and the reinforced support beams on the parapet are connected and fixed by bolting and casting with steel bars;

The lower part of the diagonally braced suspension beam is provided with a support member;

Ladder scaffolding is provided under the support member;

The inner probe end of the lower plane of the ladder scaffold is fixed at the root of the parapet, the lower plane of the ladder scaffold protrudes out to the outside of the parapet wall, and the lower end of the ladder scaffold faces upwards. Scaffolding, four-step scaffolding;

The first-order scaffolding, second-order scaffolding, third-order scaffolding, and fourth-order scaffolding are extended and erected in sequence;

The lower plane of the ladder scaffolding is fixed in a matrix-like distribution with hinged seats, on which a vertical rod is hinged, the vertical rod extends upward, and the top of the vertical rod is fixed on the main beam of the external inspection by bolts; the vertical rod is fixed and suspended ladder scaffolding;

The outer edge of the ladder scaffolding is fixedly connected with a protective railing, and the protective railing extends upwards and is fixed on the main beam of the external inspection by bolts;

A dense mesh is hung on the outer interface of the protective railing, and the dense mesh is bound to the protective railing;

A climbing ladder is fixed obliquely between the parapet and the first-order scaffolding. The bottom end of the ladder is fixedly connected with the first-order scaffolding through scaffold fasteners. The frame beam is fixed by bolting;

The upper surface of the first-order scaffolding, second-order scaffolding, third-order scaffolding, and fourth-order scaffolding are all laid with pedals along the span direction of the ladder scaffolding, and the corners of the pedals are bound and fixed to the ladder scaffolding where they are located;

The adjacent facades of the first-level scaffolding, second-level scaffolding, third-level scaffolding, and fourth-level scaffolding are laid with vertical boards, and the vertical boards are bound and fixed to the adjacent ladder scaffolding.

Footrests are perforated steel footrests.

The vertical board is made of bamboo plywood.

Compared with the prior art, the utility model has the following beneficial effects:

The hanger used in the construction of ultra-high and ultra-long cantilever components saves costs, and can save nearly two-thirds of the construction cost compared with the steel pipe frame.

The construction influence area is less, compared with the steel pipe frame, it has less impact on other construction operations, and hardly affects other construction types.

Flexible construction and high safety factor. The platform is calculated for each stress point, and those that do not reach or approach the dangerous value are reinforced. When workers work on this platform, empathy can be said to be that the ground level is moved up, and the workers are flexible and convenient for construction. Compared with the hanging basket, the safety factor is much higher.

The stability of the frame is good, and the overall performance of the hanger is good after the installation is completed, and the stability is strong.

The hanger applied to the construction of ultra-high and ultra-long overhanging components has reasonable design, simple structure, safety and reliability, convenient use and easy maintenance, and has good popularization and use value.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Accompanying drawing 2 is the top view structure schematic diagram of the ladder scaffold of the present utility model;

Accompanying drawing 3 is the main view structure schematic diagram of the ladder scaffold of the present utility model;

Accompanying drawing 4 is the structural representation of the pedal of the stepped scaffold of the present invention.

The marks in the accompanying drawings indicate respectively:

1. The top floor slab of the building, 2. The suspended floor frame, 3. The parapet,

4. Main beam for external exploration, 5. Diagonal bracing suspension beam, 6. Frame beam, 7. Reinforced support beam,

8. Support member, 9. Ladder scaffolding, 10. Inner probe end,

11. First-order scaffolding, 12. Second-order scaffolding, 13. Third-order scaffolding, 14. Fourth-order scaffolding,

15, hinged seat, 16, vertical rod, 17, bolt tie,

18, protective railing, 19, dense mesh,

20. Ladder, 21. Scaffolding fasteners,

22, pedals, 23, vertical board.

detailed description

A kind of hanger of the present utility model applied to the construction of superhigh and superlong cantilever components will be described in detail below in conjunction with the accompanying drawings.

As shown in the accompanying drawings, a hanger of the utility model applied to the construction of super high and super long cantilevered components, its structure includes a suspended floor frame 2 fixed above the top floor slab 1 of the building,

A parapet 3 is constructed at the edge of the top floor slab 1 of the building;

The edge of the suspended floor frame 2 extends outward and is fixedly provided with a horizontal main girder 4 for external exploration,

Diagonal bracing suspension beams 5 are arranged obliquely between the parapet wall and the main girder of the external exploration.

A reinforced support beam 7 is erected between the parapet and the frame beam 6 of the suspended floor frame;

The ends of the diagonally braced suspension beams and the reinforced support beams on the parapet are connected and fixed by bolting and casting with steel bars;

The lower part of the diagonally braced suspension beam 5 is provided with a support member 8;

A stepped scaffolding 9 is provided below the supporting member 8;

The inner probe end 10 of the lower plane of the ladder scaffolding is fixedly constructed at the root of the parapet, the lower plane of the ladder scaffolding protrudes out to the outside of the parapet wall, and the lower end of the ladder scaffolding faces upwards and is connected with a first-order scaffolding 11 and a second-order scaffolding 12 , Three-stage scaffolding 13, four-stage scaffolding 14;

The first-order scaffolding, second-order scaffolding, third-order scaffolding, and fourth-order scaffolding are extended and erected in sequence;

The lower plane of the ladder scaffold 9 is fixedly arranged in a matrix-like distribution with hinged seats 15, on which a vertical rod 16 is hinged, and the vertical rod extends upwards, and the top of the vertical rod 16 is fixed on the main girder 4 of the outer probe through a bolt tie 17 ;Pole fixed suspension ladder scaffolding;

The outer edge of the ladder scaffold 9 is fixedly connected with a protective railing 18, and the protective railing extends upwards and is fixed on the main girder of the external exploration by bolts;

A dense mesh 19 is hung on the outer interface of the protective railing 18, and the dense mesh is bound on the protective railing;

A climbing ladder 20 is fixed obliquely between the parapet and the first-order scaffolding, and the bottom end of the climbing ladder is fixedly connected with the first-order scaffolding through a scaffold fastener 21. The supporting suspension beam is fixed by bolting;

Step 22 is laid on the upper surface of the first-order scaffold, second-order scaffold, third-order scaffold, and fourth-order scaffold along the span direction of the ladder scaffold, and the corners of the foot pedal are bound and fixed to the ladder scaffold where it is located;

The vertical panels 23 are laid on the adjacent facades of the first-level scaffolding, second-level scaffolding, third-level scaffolding, and fourth-level scaffolding, and the vertical panels are bound and fixed to the adjacent ladder scaffolding.

Pedal board 22 adopts perforated steel pedal board.

Riser 23 adopts bamboo plywood.

Site construction:

1. Construction sequence

Reinforcement→Pre-embedding→Installation of main support beam→Installation of suspenders→Installation of lateral support beams→Installation of ladder scaffolding→Installation of pedals→Installation of guardrails→Hanging safety nets→Installation of aluminum keels→Installation of aluminum plates on the bottom surface→Glue injection→Removal of guardrails→ Removal of the pedal → removal of the horizontal support → removal of the vertical support → installation of the aluminum plate at the tie rod → installation of the top aluminum plate.

2. Construction method

1) Reinforcement treatment

According to calculations, the original building structure cannot meet the load after the construction platform is installed, and the building structure needs to be reinforced before installation. Reinforcement is carried out according to the design drawings, and the construction is strictly carried out according to the drawings during reinforcement to ensure that the materials used meet the design requirements, the installation is correct, and the force direction is correct.

2) Embedded installation

The pre-embedded spacing corresponds to a uniform offset of 100mm below the original steel structure support beam, and fixed embedded parts are set at an elevation of 36.2m. Use a spirit level to level the civil structure at 36.2m, and drill holes in the civil structure according to the perforation position of the embedded steel plate. The hole diameter is 14mm and the hole depth is not less than 110mm. Anchor, fully stir evenly. Install the 250x200x8 pre-embedded steel plate after the chemical bolts are fixed for 30 minutes. Weld 8mm connecting steel plates on the pre-embedded.

3) Cantilever main support beam installation

The main support beam is welded and processed on the ground, and two 10# channel steel tie rods are fixed to the connecting ear plates of the support beam with m25x40 high-strength bolts. Use a small hoist fixed on the original steel structure for hoisting. After hoisting in place, one end is fixed to the pre-buried connecting steel plate with m16x40 high-strength bolts, adjust the level of the support beam, pre-fix the tie rods on the original steel structure, and adjust the tie. The verticality of the rod, fixed tie rod.

4) Lateral support beam installation

Lateral support beams are installed in an inside-out order. There is a 20mm installation adjustable gap at both ends of each beam to prevent uneven spacing of the cantilever beams.

5) Ladder scaffolding installation, pedal laying

After the horizontal support beam is installed, the horizontal safety net is hung, and the net rope is required not to be damaged, tightly tightened, spliced tightly, and fixed firmly with iron wires.

Start installing the ladder scaffolding. The ladder scaffolding is divided into four steps, each step has a height difference of 600mm and a width of 1200mm. A sleeve with a length of 150mm and a diameter of 60mm is pre-welded on the transverse support beam, with a spacing of 1400mm. The scaffold pole is placed in the sleeve, and the pole is fixed by tightening the bolts on the sleeve. The horizontal and vertical poles are connected by 90° cast iron fasteners.

250x3000mm perforated steel pedals are laid horizontally with the beam, and the pedals are bound with 3mm iron wire, and each pedal has no less than four binding points. 12mm bamboo plywood is laid on the facade of the ladder scaffolding, and the bamboo plywood and steel pipes are bound with iron wires.

6) Installation of protective railings

Set up protective railings on the outer edge of the platform, and the protective railings are built with round steel pipes with a diameter of 48mm. Weld round pipes with a length of 150mm and a diameter of 60mm on the beam at a distance of 1400mm. When installing the guardrail, the vertical guardrail steel pipe is inserted into the 60mm round pipe to fix it. The horizontal railing is connected to the vertical railing through a 90° steel pipe fastener with a spacing of 1200mm. And connected with ladder scaffolding. The top of the guardrail is connected to the original steel structure with horizontal tie rods at a distance of 1400mm.

After the guardrail is installed, a dense mesh is hung on the outside. It is required to tighten the ring firmly, to splice tightly, and to fix it firmly with iron wire.

7) Safety rope installation

An independent safety rope is set up on the construction platform, and the construction personnel fix the safety belt on the safety rope. The safety rope is made of 16mm nylon rope, fixed on the structural column on the roof of the building, the distance between the fixed points is 8.4m, the elevation is above the parapet wall, and it extends below the decorative surface of the aluminum plate for hanging the safety belt.

3. Channel

For the convenience of construction workers, the construction platform of this project is equipped with climbing ladders. The specific set-up requirements are as follows:

1) The height difference between the parapet top of the building roof and the construction platform is 2.3 meters. Use round steel pipes with a diameter of 48mm to set up ladders for workers to go up and down, and shall not be used for material transportation. The height of the climbing ladder is 3m, the width is 1m, and the distance between the step bars is 400mm, which are connected by frame buckles.

2) Set up a climbing ladder at 16.8m, uniformly painted in red and white colors.

3) It can be put into use only after passing the acceptance test.

Technical requirements for construction platform erection

1. It is strictly forbidden to drill holes on the installed platform.

2. The quality inspection of the steel structure should be carried out before use. If there are cracks or deformation, it is strictly forbidden to use it. The bolts with slippage must be replaced.

3. When the scaffolding pieces are vertically butt-jointed and tiled, a horizontal horizontal bar must be installed at the joint, the scaffolding pieces have overhangs, and the sum of the overhanging lengths of the two pieces of scaffolding pieces is not more than 200mm.

4. High-strength bolts are used for the connecting bolts of the steel structure, and the torque value of the bolts is adopted according to the calculation.

5. Before the construction platform is erected, the structural calculation must be approved by the civil engineering design unit and the original steel structure design unit.

6. When the original tie points of the guardrail need to be removed due to construction needs, the temporary tie knots shall be shifted and reinforced. The tie points within a span shall not be removed at the same time to ensure the safety and reliability of the outer frame.

7. The safety rope must be set independently and must not have any connection with the original steel structure or construction platform. When fixing on the building structure, avoid places that are easily deformed or easily damaged.

Acceptance and inspection of construction platforms

1. The platform shall be erected in sections according to the needs. After erection, it shall be inspected and accepted. Only after passing the inspection and acceptance can it be put into use. During the acceptance inspection, supervisors, project managers, shelf monitors, and relevant personnel from the safety department must participate and sign.

2. After the platform is put into use, security officers should check the platform during regular security inspections.

3. The construction load on the platform shall meet the design requirements and shall not be overloaded. No material or structure shall be hoisted on the platform.

4. The acceptance and daily use of the platform shall be carried out in accordance with the following regulations, and it shall be put into use or continue to be used only after passing the inspection.

1) After setting up;

2) Continuous use for six months

3) After being subjected to strong factors such as storms, heavy rain, heavy snow, and earthquakes;

4) Stop working for more than 15 days during construction, before re-use;

5) When it is found that there is significant deformation, settlement, removal of bars and knots, and potential safety hazards during use.

5. After the decoration starts, it is necessary to focus on checking the connection of the shelf and the laying of the scaffolding.

6. During the use of scaffolding, it is strictly forbidden to dismantle or cut various facilities at will.

Platform dismantling scheme

Because this project is a relatively tall high-rise building, the platform is dismantled at intervals. The platform at the corner of the building is removed first, and then intervals are removed, and a small winch is used to transport the pedals, steel pipes and channel steel beams. The rest of the platform is lowered to the ground with 4 winches as a whole. Fasteners and small accessories are transported down from the construction elevator.

The dismantling of building construction scaffolding must comply with the relevant provisions of JGJ80-91 Safety Technical Specifications for Working at Heights and the provisions of JGJ130-2001, especially the relevant provisions for working at the same place in strong wind areas, and working at heights in snowy and rainy days. This project is a high-altitude steel structure construction platform, and the following items should be paid attention to when dismantling:

1. Before the demolition, the operators, management personnel, inspectors and guardians who participated in the demolition shall be fully informed about the construction plan, safety, quality and exterior decoration protection measures.

2. Before dismantling, conduct a safety inspection on the platform to confirm that there are no hidden dangers in the platform. If there are hidden dangers affecting the safety of demolition, the platform should be repaired and reinforced first to ensure that no danger occurs during the demolition.

3. Delineate the sign of the work area, prohibit pedestrians from entering, and hand it over to special personnel for guardianship.

4. Unify command, echo up and down, and coordinate movements. When untying the knot related to another person, you should inform the other party to prevent falling.

5. Materials and tools should be transported with pulleys and ropes, and should not be thrown around.

6. After the removed scaffold steel pipes, fasteners and other materials are transported to the ground, they should be cleaned up in time and classified and stacked.

7. When the daily dismantling of the platform comes to an end, it is necessary to check the safety of the part that has not been dismantled, and also check the surrounding environment. Hidden danger.

Safety and Environmental Protection Measures

1. Lightning protection grounding device:

Because the height of the project is relatively high, a lightning protection grounding device needs to be installed. The steel structure of the platform is welded with Ф12 galvanized round steel and the original steel structure, and connected with the lightning protection grounding device of the building to form a systematic lightning protection grounding device, and its grounding resistance shall not exceed 10 ohms.

2. Safety operation requirements:

1) Workers must wear safety helmets, fasten safety belts, wear soft-soled non-slip shoes, and wear comfortable clothes according to safety requirements;

2) Workers must wear safety helmets, fasten seat belts, wear soft-soled non-slip shoes, and wear comfortable clothes according to safety requirements; operators on shelves must have operating certificates for climbing;

3) Strictly abide by the relevant safety regulations for high-altitude operations, and those who suffer from diseases that are not suitable for high-altitude operations and other personnel who are not suitable for high-altitude operations are not allowed to dismantle scaffolding;

4) Operators must be familiar with and abide by national safety regulations and safety technical regulations of their posts, use personal protective equipment correctly, and are strictly prohibited from going to work after drinking;

5) It is forbidden to climb up and down the outer frame, and it is not allowed to laugh or fight on the working surface;

6) In the process of erection and dismantling, no replacement is allowed in the middle. In case of a replacement in the middle, a detailed disclosure should be made to the replacement personnel in time;

7) In case of six-level strong wind, rain, snow and night, the erection and dismantling operations should be stopped;

8) When dismantling, there should be protective measures to prevent falling objects from hurting people on the outside, and a safety warning sign should be hung, a safety alert area should be set up, and special personnel should be assigned to guard, and non-operating personnel are strictly prohibited from entering;

9) Do not throw objects downward during operation, and do not walk on unfixed rods;

10) Collect tools and materials when off work, and remove unsafe factors;

3. Fire safety

1) All heavy equipment is not allowed to be placed on the construction platform, and electric welding machines are placed on the floor;

2) Wires cannot be pulled privately on the platform, and professional electricians must have wiring in place;

3) There should be no less than two fire extinguishers at a distance of 8.4m, and the welding parts need to be doubled.

No flammable materials shall be placed under the welding part, and a fire bucket shall be set.

Claims (3)

1. A hanger applied to superhigh and superlong cantilever member construction, characterized in that it comprises a suspended floor frame fixedly constructed above the top floor of the building, A parapet is built on the edge of the top floor of the building; The edge of the suspended floor frame extends outward and is fixedly provided with a horizontal main girder for external exploration. Diagonal bracing suspension beams are installed obliquely between the parapet wall and the main girder of the external exploration. Reinforcement support beams are erected between the parapet and the frame beams of the suspended floor frame; The ends of the diagonally braced suspension beams and the reinforced support beams on the parapet are connected and fixed by bolting and casting with steel bars; The lower part of the diagonally braced suspension beam is provided with a support member; Ladder scaffolding is provided under the support member; The inner probe end of the lower plane of the ladder scaffold is fixed at the root of the parapet, the lower plane of the ladder scaffold protrudes out to the outside of the parapet wall, and the lower end of the ladder scaffold faces upwards. Scaffolding, four-step scaffolding; The first-order scaffolding, second-order scaffolding, third-order scaffolding, and fourth-order scaffolding are extended and erected in sequence; The lower plane of the ladder scaffolding is fixed in a matrix-like distribution with hinged seats, on which a vertical rod is hinged, the vertical rod extends upward, and the top of the vertical rod is fixed on the main beam of the external inspection by bolts; the vertical rod is fixed and suspended ladder scaffolding; The outer edge of the ladder scaffolding is fixedly connected with a protective railing, and the protective railing extends upwards and is fixed on the main beam of the external inspection by bolts; A dense mesh is hung on the outer interface of the protective railing, and the dense mesh is bound to the protective railing; A climbing ladder is fixed obliquely between the parapet and the first-order scaffolding. The bottom end of the ladder is fixedly connected with the first-order scaffolding through scaffold fasteners. The frame beam is fixed by bolting; The upper surface of the first-order scaffolding, second-order scaffolding, third-order scaffolding, and fourth-order scaffolding are all laid with pedals along the span direction of the ladder scaffolding, and the corners of the pedals are bound and fixed to the ladder scaffolding where they are located; The adjacent facades of the first-level scaffolding, second-level scaffolding, third-level scaffolding, and fourth-level scaffolding are laid with vertical boards, and the vertical boards are bound and fixed to the adjacent ladder scaffolding. 2. A hanger applied to the construction of super-high and super-long cantilever members according to claim 1, characterized in that the pedals are perforated steel pedals. 3. A hanger for construction of super-high and super-long overhanging components according to claim 1, characterized in that: the vertical board is made of bamboo plywood.