CN107558719A - For high-rise frame steel construction adjustable mobile operating platform and its construction method - Google Patents

Abstract

The invention provides an adjustable mobile operation platform for a high-rise frame steel structure, which includes a platform frame surrounding a steel column, a platform steel decking plate is laid on the upper surface of the platform frame; columns and horizontal rails are arranged on the edge of the platform frame; the bottom of the platform frame is connected to the There are inclined support beams between the steel columns; the bottom of the inclined support beams is fixed to the steel columns, and the top of the inclined support beams is fixed to the bottom of the platform frame; one side of the platform frame is provided with a reserved opening, and the reserved opening is The surface is paved with movable planks, and detachable hanging chains are set between the columns on both sides of the reserved opening. The construction method of this operation platform is: prefabricate the platform frame on the ground, and set a reserved opening on one side; set up columns for the platform frame frame, lay steel planks, The open surface is reserved for laying movable planks; the top of the inclined support beam is fixed on the bottom of the edge of the platform frame; the platform is hoisted to the corbel; the bottom of the inclined support is fixed on the surface of the steel column. , the supporting structure is stable.

Description

Adjustable mobile operating platform for high-rise frame steel structure and its construction method

technical field

The invention relates to a construction method for installing box-type, pipe-type, H-type and cross frame columns of a high-rise steel structure, in particular to a construction method for an adjustable mobile operating platform of a high-rise frame steel structure.

Background technique

1. Use the external ladder to reach the installation position of the platform steel beam from the ground, and then build the construction operation platform at the installation node position by welding the steel structure material according to the site conditions, so as to carry out the bolt welding operation at the installation port position. This method uses angle steel, steel pipe, steel plate and its wooden springboard to build the operation platform. The installation of the operation platform itself has certain safety hazards and risks in the high-altitude installation and construction on site, and the required amount of materials must not be small. Moreover, in the construction of steel structures, the processing of joints is often very slow, while the progress of steel structure installation is very fast. It takes a lot of materials to continuously build the operation platform after selecting and dismantling the interlayer repeatedly, not to mention the construction of the operation platform. The demolition is carried out under the premise of the material, and the position of the removed solder joint needs to be polished and derusted → the coating process is very troublesome, and the size of the final material used will be shortened after repeated cutting, which is almost impossible to reuse and can only be discarded;

2. Use the working crane to hoist the cage to carry out the bolt welding operation at the position of the installation port. In this method, the bearing capacity of the floor slab needs to meet the requirements of the dynamic load of the crane. For some special engineering environments, the floor design does not take into account the factors caused by the dynamic load bearing capacity of the crane;

3. Use the climbing car to position and lift the cage to carry out the bolt welding operation at the position of the installation port. In this method, the bearing capacity of the floor needs to meet the dynamic load requirements of the climbing vehicle. For some special engineering environments, the floor design does not take into account the dynamic load bearing capacity of the climbing vehicle, and the climbing vehicle cannot be used. Even if the load can meet the construction requirements, the maximum lifting height and position of the climbing car in some special areas cannot be achieved;

4. Use steel pipes to set up scaffolding operation platforms to carry out bolt welding operations at the installation ports. This method sets up steel structure pipe scaffolding to complete the construction task, which is subject to height and safety construction restrictions, and there are certain safety risks in construction. Scaffolding needs to be erected and dismantled, and it is the only erection at a fixed point, with a huge amount of work, high cost and uneconomical;

5. Use the movable scaffold to locate and set up the operation platform to carry out the bolt welding operation at the position of the installation port. Although this scheme can solve the construction problems of some low-rise nodes, there are three problems in erecting movable scaffolding that cannot be ignored: firstly, there is a certain limit on the construction height of erecting movable scaffolding, which cannot meet the construction requirements for heights exceeding the standard limit ; Second, there are certain safety hazards and risks in the construction of the movable scaffold itself, and it is also subject to safety construction restrictions; third, the operating environment of the movable scaffold is that the ground is flat and has certain load requirements, and usually the steel structure frame is constructed before the floor platform , so that the movable scaffolding cannot be put in place layer by layer, and the construction is subject to certain restrictions. This kind of scheme needs to be properly selected according to the actual situation on site;

Contents of the invention

The present invention aims to solve the problems existing in the installation and construction operation platform of the steel column of the high-rise steel structure frame, and provides a simple, practical, convenient installation, stable support structure and low construction cost operation platform.

An adjustable mobile operating platform for high-rise frame steel structures, including a platform frame surrounding a steel column, platform steel decking is laid on the upper surface of the platform frame; columns and horizontal rails are arranged on the edge of the platform frame; the bottom of the platform frame and the steel column There is an oblique support beam between them; the bottom end of the oblique support beam is fixed to the steel column through connector 1 and bolts, and the top of the oblique support beam is fixed to the bottom of the platform frame through connector 2 and bolts; one side of the platform frame is set There is a reserved opening, the upper surface of the reserved opening is laid with movable planks, and detachable hanging chains are arranged between the columns on both sides of the reserved opening.

The scheme adopts a triangular support structure, using the least material to achieve the best support effect, and an opening is reserved on one side of the platform to facilitate subsequent hoisting work.

The construction method of above-mentioned operating platform, its construction steps are:

Step 1: Prefabricate the platform frame on the ground with reference to the size of the intended installation position of the steel column, and set a reserved opening on one of the four sides;

The second step is to set up columns around the platform frame, lay steel planks on the surface of the platform frame, lay movable planks on the surface of the reserved opening, set up horizontal rails on the columns for protection, and install detachable chains between the columns on both sides of the reserved opening;

Step 3: Fix the second connecting piece at the bottom of the edge of the platform frame, and fix the top of the inclined support beam with bolts;

Step 4, install the crane from the direction of the reserved opening, and use the crane to lift the operating platform to the corbel where the steel column is to be installed;

In step 5, the construction personnel determine the installation position, fix the connecting piece at the position corresponding to the lower end of the oblique support on the surface of the steel column, and fix the oblique support with bolts;

Step 6: After the platform is installed in place, put the movable planks back to the original place and fix them. Finally, connect the platform with detachable hanging chains to ensure that the entire operation platform is closed.

This method completes the construction of the operation platform on the ground, which is convenient for construction and can ensure accuracy. The oblique support beam is easy to install, taking into account the installation work of subsequent hoisting equipment, and is safe and reliable.

Description of drawings

Figure 1 is a structural diagram of the platform frame;

Figure 2 is a depression angle view of the operating platform;

Fig. 3 is a perspective view of direction A in Fig. 2;

Fig. 4 is a schematic diagram of the combined state of the operation platform and the steel column.

In the figure: steel column 1, corbel 2, platform frame 3, reserved opening 4, movable plank 5, platform steel plank 6, column 7, horizontal rail 8, detachable hanging chain 9, connector 10, oblique support Beam 11, connector two 12.

detailed description

Below in conjunction with accompanying drawing, the present invention is described in detail, a kind of adjustable mobile operating platform for high-rise frame steel structure as shown in Figure 1-4, comprises the platform frame 3 around steel column body 1, and platform frame 3 upper surface lays a platform Steel decking 4; the edge of the platform frame 3 is provided with upright columns 7 and cross rails 8; the bottom of the platform frame 3 and the steel column 1 is provided with an oblique support beam 11; The body 1 is fixed, and the top of the inclined support beam 11 is fixed to the bottom of the platform frame 3 through the connector 2 12 and bolts; one side of the platform frame 3 is provided with a reserved opening 4, and the upper surface of the reserved opening 4 is laid with a movable plank 5. A detachable hanging chain 9 is set between the columns on both sides of the reserved opening 4 .

The platform frame 3 at the bottom of the operation platform is installed on the corbel 2 at the connection node of the steel column 1, and the corbel 2 provides part of the supporting force for the operation platform. An oblique support beam 11 is arranged on both sides of each corbel 2 for reinforcement, so that a triangular force-bearing structure is formed between the platform frame 3 and the steel column 1 . If there is really no corbel at the node that can be used as a support for hoisting, several inclined support beams can be added to ensure the force of the operating platform.

The operation platform is made of all-steel structure, and the opening for installing hoisting equipment is reserved for easy operation. Reserving the opening 4 positions to set movable planks 5 and detachable hanging chains 9, these structures can recover the completeness of the platform after completing the fixing of the operating platform.

The construction method for the adjustable mobile operating platform of the high-rise frame steel structure described in the present invention:

Step 1: Prefabricate the platform frame 3 on the ground with reference to the size of the intended installation position of the steel column body 1, and set a reserved opening 4 on one of the four sides.

Step 2: set up pillars 7 around the platform frame 3, lay platform steel planks 6 on the surface of the platform frame 3, lay movable planks 5 on the surface of the reserved opening 4, set up horizontal bars 5 on the pillars 7 for protection, and reserve the pillars on both sides of the opening 4 7 detachable hanging chains 9 are installed.

In the third step, the connecting piece 2 12 is fixed at the edge bottom of the platform frame 3, and the top of the inclined support beam 11 is fixed with bolts.

Step 4, install the crane from the direction of the reserved opening 4, and use the crane to lift the operating platform to the corbel 2 of the steel column 1 to be installed.

In step 5, the construction personnel determine the installation position, fix the connecting piece 10 at the position corresponding to the bottom end of the inclined support beam on the surface of the steel column 1, and fix the bottom end of the inclined support beam 11 with bolts.

Step 6: After the platform is installed in place, the movable plank 5 is put back and fixed, and finally the platform detachable hanging chain 9 is connected to ensure that the entire operation platform is closed around.

After the installation and construction are completed, operate in reverse order from step 6 to step 2 above, and remove the operation platform on the ground. According to this convenience, an operation platform can be continuously provided for multiple steel column butt joint nodes.

The adjustable mobile operation platform is set at 1.2 meters below the installation interface of high-rise steel structure frame columns. Adjustment, welding, grinding and testing work. According to the change of the position of different parts of the steel column, the connecting plate of the platform is properly adjusted to meet the construction requirements; the steel column is arranged to be welded and installed on the three sides of the installation interface at a certain position downward before the steel column leaves the factory.

This project requires an operating platform of 3.6m, a width of 3.4m, and a self-weight of 471kg, which can satisfy 4 construction workers working at the same time, and each person is calculated according to the weight of 80kg. Of course, adjustable mobile operating platforms can be designed according to different types of projects, that is, the connection points need to be designed from the original rigid nodes to hinge points, and the length and width dimensions can be changed through bolted holes at different positions. In this way, the expansion of construction conditions, Its scope of adaptation will be wider.

Compared with traditional methods, this adjustable mobile operation platform is more convenient in construction, flexible in operation, simple and easy to move in the installation process of high-rise steel structure box type and cross frame columns. Ensure the construction progress of the structure, greatly save the cost of construction measures and materials, and complete the construction tasks with high efficiency and high quality. Of course, operating platforms with different structures can be designed according to different types of projects, and the span size can be changed by calculating and changing the different cross-section conditions. With the expansion of construction conditions, its scope of application will be wider.

Claims (2)

1. one kind is used for high-rise frame steel construction adjustable mobile operating platform, including the platform framework around steel column, put down Lay platform steel bed board in table frame upper surface；Platform framework edge is provided with column and horizontal bar, it is characterized in that：Platform framework bottom Bearing diagonal beam is provided between steel column；Bearing diagonal beam bottom is affixed by connector one and bolt and steel column, bearing diagonal back End is affixed by connector two and bolt and platform framework bottom；Side in platform framework surrounding is provided with reserved opening, reserves Open upper surface is equipped with movable bed board, and detachable chaining is set between two heel posts of reserved opening.

2. for the construction method of high-rise frame steel construction adjustable mobile operating platform, its construction procedure is：

1st step, intend the size on installation position with reference to steel column, in ground prefabricated platform framework, set in four sides wherein side Reserved opening.

2nd step, column is set up in platform framework surrounding, platform framework surface laying steel bed board, reserves open surfaces laying activity Bed board, horizontal bar protection is set on column, detachable chaining is installed between the column of reserved opening both sides；

3rd step, in the affixed connector two of platform framework edge bottom, bearing diagonal back end is fixed with bolt；

4th step, from reserved opening direction erection crane, operating platform is lifted to the ox for intending installation steel column using crane On leg.

5th step, workmen determine installation site, in affixed connection on position corresponding to the lower end of steel column surface bearing diagonal Part is in the lump fixed bearing diagonal with bolt.

6th step；Just movable bed board is replaced and fixed after stage+module is in place, finally by platform detachable hanging chain link Get up, ensure whole operation platform surrounding closure.