CN204185146U - Construction of Steel Structure overhang crane between skyscraper two tall buildings - Google Patents

Abstract

A suspension crane for steel structure construction between two towers of a high-rise building, including the upper chord of the crane truss, the lower chord of the crane truss, I-beam, connectors, and electric hoist, characterized in that: the upper chord of the crane truss and the lower chord of the crane truss pass through the web of the crane truss and the The two ends of the upper chord of the crane truss are truss ends, which are shelved and fixed on the concrete beam; the lower flange of the lower chord of the crane truss is provided with a connecting piece, and the connecting piece is connected to the track I-beam. The flange is connected by bolts, the lower chord of the crane truss is parallel to the I-beam of the track on the vertical plane, and the two ends of the I-beam of the track are connected by rubber blocks or angle steel to the web of the I-beam of the track to form a car block; the electric hoist passes through The walking device is installed on the track I-beam; the hook and hook of the chain hoist are respectively tied to the concrete column and the end of the truss with a steel wire rope. The lifting capacity is large, the construction efficiency is high, and at the same time, the public lifting equipment is not occupied for a long time, which ensures the simultaneous progress of various professional constructions.

Description

Suspension crane for construction of steel structure between twin towers of high-rise building

Technical field

The utility model relates to a hoisting device for building construction, in particular to a suspension crane for steel structure construction between double towers of a high-rise building. Suspension-type hoisting equipment that can hoist large-scale steel components during steel structure construction and can be transported longitudinally between the twin towers of high-rise buildings.

Background technique

At present, the commonly used lifting equipment on construction sites includes fixed cranes (such as fixed tower cranes, etc.), mobile cranes (such as truck cranes, crawler cranes, etc.). For high-rise public buildings with double towers mainly composed of reinforced concrete structures and steel structures as auxiliary or embellishment, the selection of tower cranes is often relatively small, and the mobile cranes cannot drive into the building to work, or due to the mobile cranes operating Large radius, high height and other reasons lead to safety problems such as failure to hoist, or collision between the boom and the tower building. This situation has a great impact on the hoisting of large steel structure components. If the large steel components are subdivided into smaller components, the steel components will often become very fragmented, which may not meet the design and specification requirements, and increase the workload on the construction site (such as hoisting, assembling, Welding, etc.), reducing construction efficiency, lengthening the construction period, and even increasing the cost of auxiliary measures. Furthermore, if the steel structure construction occupies the tower crane for a long time, it will affect the construction progress of other related disciplines such as civil engineering.

In addition, the bridge cranes (cranes) used in the factory workshop (see "Steel Structure Design Manual (Volume 1)" (Third Edition) P901~P914 for details) must be installed with parallel I-shaped steel tracks, and the maximum span of the crane is 31.5m , It is not applicable to construction sites with relatively complex and changeable conditions, for example, double towers with a distance greater than 31.5m, or the beams (rails) of the cranes on the towers are not parallel, etc., bridge cranes are not applicable. Furthermore, the maximum span of the track beam of the electric single-girder suspension crane is only 9m, and the applicability is even smaller. Gantry cranes have high requirements on their own track foundations, and the height of outriggers and spans of beams generally do not meet the construction requirements of high-rise buildings.

To sum up, the cranes commonly used on construction sites, bridge cranes used in factory workshops, electric single-girder suspension cranes, and gantry cranes cannot meet the heavy steel structure construction inside a double-tower high-rise building.

Contents of the invention

In order to overcome the shortcomings that the tower crane cannot completely hoist all the steel components in the construction of the building steel structure, and the mobile crane cannot work or the safety risk is high during operation, the utility model provides a kind of crane-steel structure construction between double towers of high-rise buildings The use of suspension cranes can not only meet the hoisting of large steel components between the two towers of high-rise buildings, reduce the workload of steel structures on the site, but also eliminate the need for long-term occupation of tower cranes, and cooperate with each professional to improve construction efficiency and reduce costs.

The technical scheme that the utility model solves its technical problem adopts is:

The upper chord of the crane truss and the lower chord of the crane truss are combined through the connection of the web of the crane truss and the strips to form a space lattice truss.

The truss material of the upper chord of the crane truss and the lower chord of the crane truss is Q235B or Q345B, and the section specification of the truss is H steel or round tube or square tube.

The lower flange of the lower chord of the crane truss is provided with a connecting piece, which is connected with the upper flange of the track I-beam by bolts. The lower chord of the crane truss is parallel to the track I-beam on the vertical plane, and rubber The block or angle steel is connected with the track I-beam web bolts to form a car block.

The specification of the rubber block is 100mm (thickness) X100mm (length) X100mm (width), and the specification of the angle steel is L80x10.

The electric hoist is installed on the track I-beam through the traveling device.

The hook and hook of the chain hoist are respectively bound to the concrete column and the end of the truss with a steel wire rope.

The utility model has the advantage of solving the problem that the tower crane cannot completely hoist all the steel components in the construction of the building steel structure, and the mobile crane cannot work or the safety risk is high during operation. The lifting capacity is obviously larger than that of the conventional tower crane, and the coverage is wide. No public hoisting equipment is occupied during the building construction. The material of the crane truss is common, the structure is simple, the cost of the electric hoist is low, the whole crane system is easy to install and dismantle, easy to operate, and can be reused.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is the elevation view of the utility model and the detailed diagram of node.

Fig. 2 is a top view of the utility model.

Fig. 3 is the application example of the utility model.

In the figure, 1- the upper chord of the crane truss, 2- the web of the crane truss, 3- the lower chord of the crane truss, 4- the end of the truss, 5- the track I-beam, 6- the connector, 7- the car stop, 8- the electric hoist, 9-hook, 10-traveling device, 11-slide, 12-concrete column, 13-concrete beam, 14-strip, 15-manual hoist, 16-concrete secondary beam, 17-high-rise building tower, 18-crane Truss, 19-large steel components, 20-steel structures that have been hoisted and assembled.

Detailed ways

The specific embodiment of the utility model is described in detail below in conjunction with accompanying drawing:

Between the two towers of the high-rise building, above the construction platform of the steel structure, install a suspension crane for the construction of the steel structure between the two towers of the high-rise building, lift the large steel components inside the building, transport them along the track to the designated location, and drop the hook for installation. The crane mainly includes four parts: crane truss 18, track I-beam 5, electric hoist 8, and manual hoist 15.

Crane truss 18: Two identical planar trusses are connected by dowels to form a spatial lattice truss, which is beneficial to improve out-of-plane rigidity and ensure lateral stability. Install track I-shaped 5 and electric hoist 8 below. The material of the crane truss is generally Q235B or Q345B, the height of the truss is generally 1/10 to 1/20 of the span, and the cross-sectional specification of the truss is generally H steel, round tube, square tube, etc. The specific method depends on the dead load, live load such as hoisting and maintenance, according to the calculation results of the current "Code for Design of Steel Structures" (GB50017-2003) and the actual situation. The two ends 4 of the truss are placed on the concrete beams 13 of the two towers 17 of the high-rise building. Between the concrete beam 13 and the contact surface of the end 4 of the crane truss, a steel plate of -10mm (thickness) x 300mm (width) is placed, on the one hand as a crane truss The slideway 11 that crossbeam moves. On the other hand, the finished concrete beam 13 is protected. If the calculation result requires, the corresponding concrete beam 13 must be partially reinforced. The end of the truss generally extends into the tower by not less than 500mm.

Track I-beam 5: selected from "Hot-rolled I-beam size, shape, weight and allowable deviation" (GB/T 706-1988), rolled from Q235B steel. Its model is decided by the model of electric hoist 8. A connector 6 is arranged on the lower flange of the lower chord 3 of the crane truss, and the connector 6 is connected with the upper flange of the track I-beam 5 by bolts, and the lower chord 3 of the crane truss is parallel to the track I-beam 5 on the vertical plane. The two ends of the track I-beam are connected with the track I-beam web bolts with 100mm (thick) X100mm (long) X100mm (wide) rubber block or L80x10 angle steel to form a car block 7 .

Electric hoist 8: Its model is determined according to the needs of the project (such as lifting capacity, lifting height, etc.), and the finished product can be customized and purchased. Its walking system is installed on the lower flange of the track I-beam and moves back and forth along the track. In general, the tonnage of the electric hoist is 0.5T/1T/2T/3T/5T/10T/16T/20T/32T, the lifting height is 6m/9m/12m/18m/24m/30m, and the lifting speed is 8m/ min, the running speed is 20m/min. The control of the electric hoist generally uses a wireless remote control.

Manual hoist 15: used to suspend the crane when it is unloaded, to pull the crane truss horizontally and horizontally, and to change the hoisting location. Its model depends on the size of the traction force.

In the construction of high-rise buildings that need to use this utility model, according to the actual situation of the project, design this utility model, especially the structural design of the crane truss 18; The actual need to change the span of the crane truss) can be implemented after passing the construction.

Use the tower crane to transfer the crane truss manufactured in sections by the factory to the construction work surface between the two towers, and then assemble it into a lattice space crane truss 18 . The connecting piece 6 is installed on the lower chord 3 of the crane truss, and the track I-beam 5 is bolted to the connecting piece 6, which is convenient for installation and disassembly, and can be reused. The size and spacing of the connectors and the selection of the I-beam 5 type of the track are determined according to the calculation results, and can also refer to "Design and Calculation of Tracks for Suspension Transportation Equipment" 06CG08. The butt welding of the crane truss 18 and the track I-beam 6 must be a first-class full-penetration weld. The lower flange of the track I-beam 6 is the running track of the electric hoist traveling device 10, so its welding inspection is qualified and must be butt welded. Seam smoothing.

When this utility model is installed, it is necessary to check whether all parts are in place safely, and there must be no missing or wrong installation, such as the wrong connection of the power cord, the missing installation of the limiter and weight limiter of the electric hoist 8. After the installation is in place, conduct a no-load test run.

After the trial operation is successful, set the lifting points on the two towers of the high-rise building, use two winches to lift the utility model to the installation position synchronously, and then install the crane truss end (4).

This utility model is re-connected to the power supply, carries out a full-load test run, and is put into use after passing the acceptance by relevant departments. Lifting workers must undergo training and work with certificates, and the specific operations must comply with the current "Safety Technical Code for Hoisting and Hoisting Engineering in Construction Construction" JGJ276-2012.

The dismantling sequence of this utility model is opposite to the installation sequence, and random and brutal cutting should be avoided during the dismantling process, which will affect its repeated use.

Claims (3)

1. Construction of Steel Structure overhang crane between a skyscraper two tall buildings, comprise that Crane Truss winds up (1), Crane Truss lower edge (3), I-beam section (5), attaching parts (6), electric block (8), it is characterized in that: Crane Truss winds up (1) with Crane Truss lower edge (3) to be connected with lacing (14) by Crane Truss web member (2) and to combine space lattice formula truss, Crane Truss winds up (1), and two ends are truss termination (4), shelve and are fixed on concrete beam (13);

The lower flange of Crane Truss lower edge (3) is arranged attaching parts (6), attaching parts (6) is with bolts with track I-beam section (5) top flange, Crane Truss lower edge (3) is parallel on vertical plane with track I-beam section (5), and the two ends of track I-beam section (5) to be connected with track I-beam section web bolt with rubber block or angle steel is arranged to car bumper (7);

Electric block (8) is arranged on track I-beam section (5) by running gear (10);

The hook of chain block (15) and suspension hook are tied on concrete post (12) and truss termination (4) with rope coil respectively.

2. Construction of Steel Structure overhang crane between a kind of skyscraper two tall buildings as claimed in claim 1, it is characterized in that: Crane Truss winds up (1) and the truss material of Crane Truss lower edge (3) is Q235B or Q345B, the cross section specification of truss is H steel or pipe or square tube.

3. Construction of Steel Structure overhang crane between a kind of skyscraper two tall buildings as claimed in claim 1, is characterized in that: rubber block specification is thick 100mm, long 100mm, wide 100mm, and angle steel specification is L80x10.