CN103912128B - The construction method of high-altitude disjunctor steel truss - Google Patents

Description

Construction method of high-altitude conjoined steel truss

technical field

The invention relates to the field of building technology, in particular to a construction method of a high-altitude conjoined steel truss.

Background technique

In recent years, there have been many high-altitude conjoined buildings. During the construction of these buildings, the main structure of the two sides of the building is usually constructed first, and then a corridor is built between the tops of the main buildings on both sides.

At present, the construction process of high-altitude corridors is usually carried out by using the traditional method of building a floor-standing support system or the overall lifting and sliding. Specifically, starting from the ground, scaffolding is overlapped between the main bodies of the buildings on both sides, and the scaffolding is built to the connection. At the predetermined position of the corridor, a bearing platform for placing equipment and standing on the scaffold is formed on the scaffold, and facade protection is set on the side of the bearing platform; Steel trusses are built between the main bodies of the side buildings to form the main beam structure of the high-altitude corridor, and then the steel trusses are used as the basis for the subsequent construction of the building, such as the installation of the bearing plate and the construction of the curtain wall, to complete the construction of the corridor. Although this construction method using scaffolding to assist in the construction of high-altitude conjoined steel trusses can ensure construction safety, the process of erecting and dismantling the scaffolding is cumbersome, which makes the construction period of the entire corridor longer, and the main span of the building on both sides And when the height is large, the overall strength of the scaffold is relatively low, the safety hazard is serious and the cost is high. Therefore, the tonnage of construction equipment on the carrying platform is limited, and some large equipment needs to be placed in other ways. The installation method of overall lifting and overall sliding is to install the building components in place through large tonnage or long-stroke jacking equipment after the pre-assembly on the ground is completed. This method is mainly limited by the construction height and requires a lifting channel The space is regular, collision-free and passable, but at the same time, the cost is high, and safety hazards are difficult to control.

Contents of the invention

Aiming at the deficiencies of the prior art, the object of the present invention is to provide a construction method for high-altitude conjoined steel trusses, which does not require scaffolding, and can improve construction efficiency and shorten the construction period while meeting construction safety and construction strength requirements .

To achieve the above object, the present invention adopts the following technical solutions:

The construction method of high-altitude conjoined steel truss includes the following steps:

A. Pre-embed supporting parts on the main body of the building on both sides, and the height of the supporting parts is located below the position of the pre-built steel truss;

B. Build a steel frame protection platform on the podium roof between the main buildings on both sides, and set support beams at both ends of the steel frame protection platform;

C. Use a tower crane to hoist the steel frame protection platform to the height of the support, and connect and fix the support beams at both ends of the steel frame protection platform to the pre-embedded supports on the main body of the building on both sides;

D. Lay plywood on the fixed steel frame protection platform, and set up protective railings around the steel frame protection platform, so that the steel frame protection platform forms a complete construction activity platform;

E. Use the tower crane to hoist the bottom main girder of the steel truss above the construction activity platform. The construction workers above the construction activity platform weld the end of the bottom main girder and the steel structure of the main body of the building on both sides. The outer welding of the bottom main girder is overhanging Beams, build scaffolding on the cantilever beams to form construction passages and operating platforms;

F. The load-bearing Bailey frame is spliced in sections on the main beam at the bottom, and the ends of the spliced Bailey frame are fixed on the steel structures of the main buildings on both sides to form the Bailey frame operating platform;

G. Build other steel components of the steel truss on the Bailey frame operating platform;

H. After the overall construction of the steel truss is completed, the supporting parts are cut, and the steel frame protection platform is hoisted to the ground.

In step H, install a winch on the main body of the building on both sides at the same height as the steel frame protection platform, use the winch to pull the end of the steel frame protection platform, cut the support, use the winch to pull the steel frame protection platform down as a whole .

In step B, the steel frame protective platform is divided into left and right parts, and in step C, after the two parts of the steel frame protective platform are hoisted, the two parts of the steel frame protective platform are laterally moved closer and fixed by welding.

After step E is completed, diagonal support beams are set between the bottom of the two ends of the bottom main girder and the steel structures of the building main bodies on both sides.

The beneficial effects of the present invention are:

Compared with the prior art, the present invention adopts the method of direct hoisting to install the steel frame protective platform, thereby forming a safe platform for equipment and workers to move about at the construction site. The method is simple, can improve the construction efficiency and shorten the construction period; in addition, the use of the Bailey frame operating platform for load bearing can ensure the construction strength.

detailed description

Below, in conjunction with specific embodiment, the present invention is described further:

The construction method of high-altitude conjoined steel truss of the present invention comprises the following steps:

A. Pre-embed supporting parts on the opposite surfaces of the main body of the building on both sides, and the height of the supporting parts is located below the position of the pre-built steel truss;

B. Build a steel-frame protective platform on the podium roof between the main building bodies on both sides, and set support beams at both ends of the steel-frame protective platform; the strength of the protective platform must be able to meet the requirements of construction equipment and manual operation. The length is equal to the building distance between the building bodies on both sides;

C. Use a tower crane to hoist the steel frame protection platform to the height of the support, and connect and fix the support beams at both ends of the steel frame protection platform to the pre-embedded supports on the main body of the building on both sides;

D. Lay plywood on the fixed steel frame protection platform, and set up protective railings around the steel frame protection platform, so that the steel frame protection platform forms a complete construction activity platform. The construction activity platform is used to place construction equipment and workers during construction. , At the same time, it can prevent the falling objects caused by the construction from falling to the ground;

E. Use the tower crane to hoist the bottom main girder of the steel truss above the construction activity platform. The construction workers above the construction activity platform weld the end of the bottom main girder and the steel structure of the main body of the building on both sides. The outer welding of the bottom main girder is overhanging Beams, build scaffolding on the cantilever beams to form construction passages and operating platforms;

F. The load-bearing Bailey frame is spliced in sections on the main beam at the bottom, and the ends of the spliced Bailey frame are fixed on the steel structures of the main buildings on both sides to form the Bailey frame operating platform;

G. Build other steel components of the steel truss on the Bailey frame operating platform;

H. After the overall construction of the steel truss is completed, the supporting parts are cut, and the steel frame protection platform is hoisted to the ground.

Compared with the existing construction method of scaffolding, the above method uses a tower crane to hoist the steel frame protection platform, which can simplify the construction process, improve construction efficiency, and shorten the construction period. In addition, the use of the Bailey frame operation platform for load bearing can ensure construction strength.

For the convenience of operation, in the above step H, a hoist can be installed on the main body of the building on both sides at the same height as the steel frame protection platform, and the end of the steel frame protection platform can be pulled by the hoist, and then the support is cut, and the hoist can be used to Pull the steel frame protection platform as a whole, so that the steel frame protection platform slowly descends to the ground.

In the above-mentioned step B, the steel frame protection platform is divided into left and right parts and welded respectively. After the two parts of the steel frame protection platform are hoisted in step C, the two parts of the steel frame protection platform are horizontally moved closer and fixed by welding. In this way, It can reduce the load of the tower crane.

After step E is completed, diagonal support beams are set between the bottom of the main beam at both ends and the steel structures of the main buildings on both sides to increase the connection strength between the main beam at the bottom and the steel structures of the main buildings on both sides.

Those skilled in the art can make various other corresponding changes and deformations according to the above-described technical solutions and concepts, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (4)

1. the construction method of high-altitude disjunctor steel truss, is characterized in that, comprises the steps:

A, on the building body of both sides respectively pre-buried supporting member, the height of supporting member is positioned at the below of building steel truss position in advance;

Steelframe protective platform built by B, annex roofing between the building body of both sides, arranges brace summer respectively at the two ends of steelframe protective platform;

C, utilize tower crane by the lifting of steelframe protective platform to the height of supporting member, the brace summer at the two ends of steelframe protective platform is fastened on respectively on supporting member pre-buried on the building body of both sides;

D, on the steelframe protective platform fixed, lay veneer, the surrounding of steelframe protective platform sets up guard rail, makes steelframe protective platform form complete construction activities platform;

E, utilize tower crane by above the bottom main cable and girder of steel truss to construction activities platform, constructor above construction activities platform welds the steel work of bottom end of main beam with both sides building body, the outside welding Cantilever Beams of bottom girder, Cantilever Beams scaffolds erecting, forms construction passage and operating platform;

F, on the girder of bottom sectionally smooth join load-bearing Bailey bracket, the Bailey bracket end winding support of splicing, on the steel work of both sides building body, forms Bailey bracket operating platform;

G, on Bailey bracket operating platform, build other steel beam column of steel truss;

After H, steel truss integral construction complete, cutting supporting member, by the lifting of steelframe protective platform to ground.

2. the construction method of high-altitude as claimed in claim 1 disjunctor steel truss, it is characterized in that, in step H, position identical with steelframe protective platform height on the building body of both sides installs a hoist engine respectively, hoist engine is utilized to draw the end of steelframe protective platform, after cutting supporting member, hoist engine is utilized to be declined by steelframe protective platform integrally dragging.

3. the construction method of high-altitude as claimed in claim 1 disjunctor steel truss, it is characterized in that, in step B, steelframe protective platform divides left and right two parts, after two parts of steelframe protective platform have lifted by step C, two parts of steelframe protective platform are laterally drawn close and have been welded and fixed.

4. the construction method of high-altitude as claimed in claim 1 disjunctor steel truss, is characterized in that, after step e has been carried out, arrange bearing diagonal beam bottom girder two ends, bottom and between the steel work of both sides building body.