CN205558304U - Hoist and mount system of large -scale steel gallery truss - Google Patents

Abstract

The utility model discloses a hoisting system for a large-scale steel corridor truss. The hoisting system includes a hoisting point, a hoisting point and a jack hoisting device installed between the two. The hoisting point includes a first hoisting frame connected to a main structure and a The second lifting frame connected with the main structure two, there are two embedded steel beams of the same height and parallel in the two lifting frames, the ends of which are set as lifting points, and a box is welded on both sides of the lifting point beam body A jack is installed on each box-shaped corbel, and a torsion-resistant steel beam is welded between the two box-shaped corbels on the inner side; To the corresponding lifting point, the steel strand passes through the box-shaped corbel from top to bottom, and is fixed with anchors after going down through the lifting point. During construction, the four lifting points are lifted synchronously. The utility model has reasonable design and simple operation, and effectively solves the problems of large occupied area, heavy weight and poor balance faced in the hoisting process of the large-scale steel corridor truss.

Description

A hoisting system for a large-scale steel corridor truss

technical field

The utility model relates to the technical field of truss hoisting construction, in particular to a hoisting system of a large-scale steel corridor truss.

Background technique

Corridor is a kind of complex high-rise building structure system. It generally refers to the connection between two or several high-rise buildings by overhead connectors to meet the requirements of building shape and use function. The connecting body is the corridor. Its span is several meters long, also has tens of meters long. There are one or several corridors arranged vertically along the building. On the one hand, the setting of the corridor is due to the requirements of architectural functions, and it can facilitate the connection between the two main structures. At the same time, the conjoined body has good lighting effects and a wide view, so it can be used as a sightseeing corridor or a leisure coffee shop; on the other hand, due to the setting of the corridor, it can make the appearance of the building more distinctive and create a more Harmonious architectural atmosphere. In addition, there is a fire corridor, which serves as a safe passage, and has high requirements for fire protection, so it must be made of fire-resistant materials.

At present, the large-scale steel corridor truss generally adopts the method of overall lifting after ground assembly, but when the overall lifting is carried out, due to the large area occupied by the steel corridor truss, heavy weight, and poor stability, it is difficult to carry out hoisting construction. The hoisting process It is very easy to have technical problems in which the balance is difficult to control or the safety cannot be guaranteed.

Utility model content

The purpose of this utility model is to provide a hoisting system for a large-scale steel corridor truss, which solves the problems in the prior art that the large-scale steel corridor truss occupies a large area, is heavy, has poor stability, and is difficult to carry out hoisting construction, and effectively solves the problems of large-scale steel corridor truss During the hoisting process of steel corridor trusses, it is very easy to have technical problems that the balance is difficult to control, and the safety cannot be guaranteed.

In order to achieve the above technical purpose, the utility model takes the following technical solutions:

A hoisting system for a large-scale steel corridor truss, which is used to lift the steel corridor truss to a predetermined height of a main structure, the main structure includes a main structure 1 and a main structure 2 located on both sides, and is characterized in that the hoisting system includes Lifting points, lifting points and jack lifting equipment installed between them;

The lifting point includes a first lifting frame, a second lifting frame and a torsion steel beam:

The first lifting frame includes two pre-embedded steel beams 1 extending horizontally from the main structure 1. The pre-embedded heights of the two pre-embedded steel beams 1 are equal to the length of the overhang, and the ends of the two pre-embedded steel beams 1 are respectively set as the first lifting frame. point and the second lifting point; both sides of the end beam body of the first lifting point and the second lifting point are respectively welded with a box-shaped corbel for fixing the jack;

The second lifting frame includes two pre-embedded steel beams 1 horizontally protruding from the main structure 2. The pre-embedded heights and overhang lengths of the two pre-embedded steel beams 2 are equal, and their ends are respectively set as the third hoisting frame. point and the fourth lifting point; the end beam body both sides of the third lifting point and the fourth lifting point are respectively welded a box-shaped corbel for fixing the jack;

The torsional steel beams are horizontal beams, and there are two in total. One is fixed between the two pre-embedded steel beams 1 of the first lifting frame; the other is fixed between the two pre-embedded steel beams 2 of the second lifting frame. between;

The lifting points are set on the steel corridor trusses, and there are four in total:

The first lifting point and the second lifting point are located on one side of the steel corridor truss, respectively vertically corresponding to the first lifting point and the second lifting point of the two frame bodies of the first lifting frame;

The third lifting point and the fourth lifting point are located on the other side of the steel corridor truss, corresponding to the third lifting point and the fourth lifting point of the two frame bodies of the second lifting frame respectively;

Jack lifting equipment includes jacks, steel strands, hydraulic oil pumps and hydraulic control devices:

There are 8 jacks in total, and 2 jacks are set at each lifting point, which are respectively fixed on the box-shaped corbels on both sides of the four lifting points at the ends of the first embedded steel beam and the second end of the embedded steel beam;

The steel strand passes through the beam body of the lifting frame from top to bottom, goes down through the hanging point of the steel corridor truss and fixes it with anchors;

The hydraulic oil pump provides power for the core jack to drive the jack to run;

The hydraulic control device is used to control the operation of the jack.

When set up, the two jacks at each lifting point are set parallel to each other.

Preferably, the setting positions of the four lifting points correspond to each other, and they can all be set on the upper chord or middle chord of the steel corridor truss, and temporary reinforcing rods are set at the lifting points for reinforcement.

Wherein, the torsion-resistant steel beam is a box-shaped beam, and its two ends are respectively welded with two box-shaped corbels between the two pre-embedded steel beams 1 or 2 pre-embedded steel beams 2 through full penetration.

As a preferred technical solution, the first lifting frame or the second lifting frame also includes a truss façade bracing supported between the outer end of the embedded steel beam 1 and the main structure 1 and connected to the main structure Stiff column corbel 1 between truss facade diagonal brace 1, truss facade diagonal brace 1 and rigid column corbel 1 provide strength support for pre-embedded steel beam 1 or pre-embedded steel beam 2.

As another technical solution, the first lifting frame or the second lifting frame also includes a truss façade bracing 2 supported between the outer end of the embedded steel beam 2 and the main structure 2, connected between the main structure 2 and the main structure 2. Stiff column corbel 2 between truss facade diagonal brace 2, vertical support connected between pre-embedded steel beam 2 and rigid column corbel 2, and connection between truss facade diagonal brace 2 and main structure 2 The transverse connecting rod between them provides strength support for the first embedded steel beam or the second embedded steel beam.

The height of the first lifting frame or the second lifting frame can be equal to the height of a floor, the elevation of the embedded steel beam 1 or the embedded steel beam 2 is the same as that of the upper floor, and the truss facade is diagonally braced. The elevation of the bottom end of the first or second truss façade diagonal bracing is the same as that of the lower floor.

The height of the first lifting frame or the second lifting frame can also be equal to the height of two floors, the elevation of the embedded steel beam 1 or the embedded steel beam 2 is the same as that of the uppermost floor, and the vertical truss The elevation of the bottom end of the first diagonal brace or the second diagonal brace of the truss facade is the same as that of the lowest floor, and the elevation of the transverse connecting rod is the same as that of the middle floor.

Preferably, the bottom end of the jack is fixed to the upper end surface of the box corbel by spot welding, and the anchor limiting plate is welded on the upper chord or the lower flange of the middle chord of the steel corridor truss around the anchorage.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. The torsion-resistant steel beam is installed on the lifting frame: the lifting point includes the first lifting frame connected with the main structure one and the second lifting frame connected with the main structure two. The pre-embedded steel beam, the end of which is set as a lifting point, a box corbel is welded on both sides of the lifting point beam body, and a jack is installed on each box corbel. A torsion-resistant steel beam is welded, and the two ends of the torsion-resistant steel beam are fully penetrated and welded with the box-shaped corbel. The setting of the torsion-resistant steel beam greatly enhances the strength and stability of the lifting frame;

2. High strength: At the lifting point, the rigid column corbels and steel beams of the first lifting frame and the second lifting frame are all high-strength pre-embedded structures to ensure the firmness and strength of the connection between the lifting frame and the main structure; The trusses around the point are strengthened by temporary reinforcing rods; the jack and the anchorage are all taken with limit measures, and the bottom end of the jack is spot-welded to the upper end of the box-shaped corbel. Anchor limiting plates are welded on the lower flange of the upper chord or middle chord;

3. The stability of the lifting process is guaranteed: during the lifting process, stop once every 2 meters during normal lifting, check whether the error between each point is controlled within 50mm, if the displacement difference is too large, supply oil separately to the slower lifting point to ensure To ensure the synchronization of each point, in order to ensure the synchronization of the lifting, a total station is added at the lifting site to measure the displacement difference of the lifting points of the structure as an auxiliary measurement measure.

To sum up, this utility model aims at the problems of large size, self-heavyness and poor stability of large-scale steel corridor trusses, and designs a special hoisting system and supporting construction methods. The hoisting system has high structural strength, reasonable design, and convenient and effective operation process control. It has good stability and has important guiding significance for the hoisting construction of large trusses.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the hoisting system of the large-scale steel corridor truss of an embodiment of the utility model;

Fig. 2 is a schematic plan view of a steel corridor truss 1 according to an embodiment of the present invention;

Fig. 3 is a schematic elevation view of a steel corridor truss 1 according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of the arrangement of four hanging points on the steel corridor truss 1 according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of the setting of the jack 8 at the lifting point according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of the installation of the steel strand 6 at the lifting point of an embodiment of the utility model;

Fig. 7 is a three-dimensional structure diagram of the two frame bodies and the torsion-resistant steel beam 7 of the first lifting frame 4 of an embodiment of the present invention;

Fig. 8 is a schematic diagram of the connection between the first lifting frame 4 and the main structure-2 according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of the connection between the first lifting frame 4 and the steel corridor truss 1 after hoisting is completed in an embodiment of the present invention;

Fig. 10 is a three-dimensional structure diagram of the two frame bodies and the torsion-resistant steel beam 7 of the second lifting frame 5 according to an embodiment of the present invention;

Fig. 11 is a schematic diagram of the connection between the second lifting frame 5 and the main structure 2 3 according to an embodiment of the present invention;

Fig. 12 is a schematic diagram of the connection between the second lifting frame 5 and the steel corridor truss 1 after hoisting is completed in an embodiment of the present invention.

Reference signs: 1-steel corridor truss, 2-main structure 1, 3-main structure 2, 4-first lifting frame, 41-embedded steel beam 1, 42-truss facade diagonal brace 1, 43- Rigid column corbel 1, 5-second lifting frame, 51-embedded steel beam 2, 52-truss facade oblique bracing 2, 53-stiff column corbel 2, 54-vertical support, 55-transverse Connecting rod, 6-steel strand, 7-torsion steel beam, 8-jack, 9-first lifting point, 10-second lifting point, 11-third lifting point, 12-fourth lifting point, 13- The first lifting point, 14-the second lifting point, 15-the third lifting point, 16-the fourth lifting point, 17-anchor, 18-floor, 19-box corbel.

detailed description

Hereinafter, an embodiment of the hoisting system of the large-scale steel corridor truss involved in the present invention will be described with reference to the accompanying drawings.

The embodiments described here are specific specific implementations of the present utility model, and are used to illustrate the concept of the present utility model. They are all explanatory and exemplary, and should not be construed as limitations on the implementation of the present utility model and the scope of the present utility model. limit. In addition to the embodiments described here, those skilled in the art can also adopt other obvious technical solutions based on the claims of the application and the contents disclosed in the description, and these technical solutions include adopting any obvious changes made to the embodiments described here. Replacement and modified technical solutions.

The accompanying drawings in this specification are schematic diagrams, which assist in explaining the concept of the utility model, and schematically represent the shapes of various parts and their interrelationships. Please note that in order to clearly show the structures of the components in the embodiment of the present invention, the drawings are not drawn in the same scale. The same reference numerals are used to designate the same parts.

As shown in Figure 1, it involves a hoisting system for a large-scale steel corridor truss, which is used to lift the steel corridor truss 1 to the predetermined height of the main structure, and Figure 2 shows the plane of the steel corridor truss 1 according to an embodiment of the present invention Schematic diagram, Figure 3 is a schematic elevation view of a steel corridor truss 1 according to an embodiment of the present invention, which is a stiff column plus steel truss structure, wherein the stiff column has been constructed in the early stage, and the main form of the steel structural member is H-shaped, The plane size of the steel corridor is 42.0m×15.4m, the span is 42 meters, and the height of the entire truss is 9 meters. When the steel corridor truss 1 is lifted as a whole, the weight of the steel member is 329.8 tons, plus the weight of the floor deck on the ground floor is 1.2mm Thick YX-200-600, about 650 square meters, 10.5 tons, 3 tons of studs, etc., the total maximum lifting weight of the steel corridor is 343.3 tons; the main structure includes the main structure 1 and the main structure 2 located on both sides. 3. Main structure 1 2 has 16 floors above ground, and main structure 2 3 has 14 floors above ground. The stiff column corbels protrude from the pre-hoisting elevation of steel corridor truss 1 for docking and fixing with steel corridor truss 1, lifting The truss part can be used as a part of the original steel corridor. After being lifted into place, each end is welded correspondingly to form a complete rigid corridor truss structure. The hoisting system includes the lifting point, the lifting point and the jack lifting equipment between the lifting point;

The lifting point includes three parts: the first lifting frame 4, the second lifting frame 5 and the torsion steel beam 7: the first lifting frame 4 includes two pre-embedded steel beams 41 extending horizontally from the main structure 2, The pre-embedded heights and overhang lengths of the two pre-embedded steel beams-41 are all equal, and their ends are respectively set as the first lifting point 9 and the second lifting point 10; the first lifting point 9 and the second lifting point A box-shaped corbel 19 for fixing the jack 8 is respectively welded on both sides of the end beam body at point 10; similarly, the second lifting frame 5 includes two pre-embedded steel beams 141 extending horizontally out of the main structure 23, The pre-embedded heights and overhanging lengths of the two pre-embedded steel beams 2 51 are all equal, and their ends are respectively set as the third lifting point 11 and the fourth lifting point 12; the third lifting point 11 and the fourth lifting point A box-shaped corbel 19 for fixing the jack 8 is welded on both sides of the end beam body at point 12; the torsion-resistant steel beam 7 is horizontally arranged, and there are two in total, and one is fixedly installed on the two pre-embedded jacks of the first lifting frame 4 Between the steel beams one 41; the other is fixedly installed between two pre-embedded steel beams two 51 of the second lifting frame 5;

The hanging point is set on the steel corridor truss 1, including four lifting points, as shown in Figure 4, the first lifting point 13 and the second lifting point 14 are located on the side of the steel corridor truss 1, respectively connected to the first hoisting point The first lifting point 9 and the second lifting point 10 of the two frame bodies of the frame 4 correspond vertically; the third lifting point 15 and the fourth lifting point 16 are located on the other side of the steel corridor truss 1, and are respectively connected to the second lifting frame The third lifting point 11 and the fourth lifting point 12 of the two frames of 5 correspond vertically; on the steel corridor truss 1, a temporary reinforcement structure is set around the four hanging points;

Jack lifting equipment includes jack 8, steel strand 6, hydraulic oil pump and hydraulic control device: as shown in Figure 5 and Figure 6, jack 8 is fixed on two pre-embedded steel beams at four lifting points-41 or pre-buried steel beams On the box-shaped corbels 19 on both sides of the end of a 51, two sets are arranged at each lifting point, a total of 8 sets; the steel strand 6 passes through the beam body of the lifting frame from top to bottom, and goes down After passing through the hanging point of the steel corridor truss 1, it is fixed with an anchor 17; the hydraulic oil pump provides power for the core jack 8, and is used to drive the operation of the jack 8; the hydraulic control device is used to control the operation of the jack 8.

Wherein, the present embodiment is as a preferred technical solution, as shown in Figure 4, the jacks 8 described in the present embodiment are fixedly installed on four lifting points, each lifting point is provided with two sets, and the two sets are arranged in parallel with each other; The lifting point is set on the upper chord or middle chord of the steel corridor truss 1; the torsional steel girder 7 is a box-shaped girder, and the two ends are respectively fully penetrated and welded with the box-shaped corbel 19 in the middle of the two pre-embedded steel girders. For the mouth 600*500*16.

The first lifting frame 4 or the second lifting frame 5 may also include a truss façade bracing 42 supported between the outer end of the embedded steel beam 41 and the main structure 2 and connected to the main structure 2. It is composed of a stiff column corbel 1 43 between the truss façade brace 1 42; in addition to this form, it can also include a truss supported between the outer end of the pre-embedded steel beam 2 51 and the main structure 2 3 Facade diagonal brace 2 52, rigid column corbel 2 53 connected between the main structure 2 3 and truss facade diagonal brace 2 52, connected between the pre-embedded steel beam 2 51 and stiff column corbel 2 53 The vertical support 54 between them and the transverse connecting rod 55 connected between the truss façade brace 2 52 and the main structure 2 3 are composed.

The height of each frame body of the first lifting frame 4 or the second lifting frame 5 can be equal to a floor height, and the elevation of the embedded steel beam one 41 or the embedded steel beam two 51 is the same as the elevation of the upper floor. Same, the elevation of the bottom end of the truss façade brace 1 42 or the truss facade brace 2 52 is the same as the elevation of the lower floor; it can also be equal to the height of two floors, and the pre-embedded steel beam 1 41 or pre-embedded The elevation of the shaped steel beam two 51 is the same as that of the uppermost floor slab 18, and the elevation of the bottom end of the truss facade diagonal brace 1 42 or the truss facade diagonal brace 2 52 is the same as the elevation of the lowermost floor slab 18. The elevation of the transverse link 55 is the same as that of the floor slab 18 of the middle floor.

The height and shape of the support frame are jointly determined by the situation of the main structure in the construction and the stress situation of the construction. In this embodiment, as shown in Fig. 7, Fig. 8 and Fig. 9, the height of the first lifting frame 4 is equal to the height of a floor, including The pre-embedded steel girder-41 suspended horizontally outside the main structure-2, the truss façade bracing-42 supported between the outer end of the pre-embedded steel beam-41 and the main structure-2 and connected to the main body The stiff column corbel-43 between structure-2 and truss facade brace-42, the elevation of the pre-embedded steel beam-41 is the same as that of the upper floor, the truss facade brace-42 The elevation of the bottom end is the same as that of the lower floor; as shown in Fig. 10, Fig. 11 and Fig. 12, the height of the second hoisting frame 5 is equal to the height of two floors, including the pre-embedded steel beam 2 suspended horizontally outside the main structure 2 3 51. The truss façade bracing 2 52 supported between the outer end of the pre-embedded steel beam 2 51 and the main structure 2 3, and the stiff column connected between the main structure 2 3 and the truss façade bracing 2 52 The second corbel 53, the vertical support 54 connected between the pre-embedded steel beam 2 51 and the stiff column corbel 2 53, and the transverse connecting rod connected between the diagonal brace 2 52 of the truss facade and the main structure 2 3 55. The elevation of the pre-embedded steel beam 2 51 is the same as that of the uppermost floor, the elevation of the bottom end of the truss façade brace 2 52 is the same as that of the lowermost floor, and the elevation of the transverse connecting rod 55 The elevation of the middle floor is the same as that of the middle floor, and temporary reinforcement members can also be set between the pre-embedded steel girder 2 51 and the truss façade diagonal brace 2 52.

In order to ensure safety, the jack 8 and the anchorage 17 all take limit measures, the bottom end of the jack 8 is spot welded to the upper flange of the lifting frame steel beam 7, and the anchorage 17 is surrounded by steel corridors. Weld the anchor limiting plate on the lower flange of the upper chord or middle chord of the truss 1. At the same time, after being lifted into place, during welding operations, the steel strands are wrapped with fireproof cloth to prevent damage to the steel strands due to welding.

When the hoisting system of the above-mentioned large-scale steel corridor truss is used for hoisting construction, according to the construction site conditions and the overall assembly plan of the steel structure, the construction process of one-time lifting in place after the overall assembly and welding of the ground of the steel structure corridor is selected. The hydraulic overall lifting of the steel corridor. During the lifting process, the synchronous control requirements between the lifting points are relatively strict. The load of each lifting point should be controlled within the range basically consistent with the theoretical calculation. During the overall synchronous lifting of the steel structure Monitor the displacement of each hoisting point in real time, focus on the synchronous displacement control of the overall hoisting, and monitor the force value changes at each hoisting point at the same time. During construction, the key positions should be strictly monitored while taking into account the reference of the force value, so as to ensure that the structural displacement control is accurate during lifting, and the lifting force value meets the design requirements. Since the synchronous lifting is controlled by computer, if the lifting is out of sync and exceeds the design value, the lifting will stop automatically. Including the following steps:

Step 1. Construction calculation and analysis: calculate and analyze the overall design before construction to ensure the safety of the construction process;

Step 2. Site layout: according to the results of construction calculation and analysis, carry out the site layout;

Step 3. Fabrication of steel corridor truss 1: Carry out sub-unit fabrication of steel corridor truss to form unit blocks to be spliced;

Step 4. Production of auxiliary parts: including temporary reinforcement structure setting on the steel corridor truss;

Step 5. Pre-entry commissioning of the jack lifting equipment: Debug the jack lifting equipment before entering the site to confirm that it meets the entry conditions; before the lifting system of this project enters the site, the software and hardware must be debugged in the workshop, and then Single machine and overall online debugging to ensure the smooth progress of the lifting process. The anchorage must pass the inspection when entering the site. The tonnage of a single jack 8 is 250 tons, and the overall synchronous lifting technology of hydraulic jacks is adopted;

Step 6. Construction platform layout: Arrange and set up the construction operation platform, and install safety guardrails on both sides of the operation platform. The safety guardrails are erected with scaffolding tubes and closed with safety nets. Only after passing the inspection and acceptance can the operator carry out the operation. Add welded steel protection measures around the lifting point jack;

Step 7. Tooling equipment enters the site: After the construction operation platform is arranged, the tooling equipment that has passed the quality inspection is brought into the site;

Step 8. Ground assembly of the steel corridor truss 1: use the supporting tire frame at the bottom to assemble the unit modules into a whole, and set temporary reinforcing rods at the lifting points;

Step 9. Installation of the lifting frame: before lifting, the lifting frame needs to be installed. The installation is carried out in strict accordance with the design drawings, and the paired frames are respectively installed on the main structure 1 2 and the main structure 2 3 as the first lifting frame 4 and The second lifting frame 5 welds a torsion-resistant steel beam 7 between the two pre-embedded steel beams of the first lifting frame and the second lifting frame; the ends of the lifting frame are respectively welded on both sides of the lifting point for installing the jack 8 box-shaped corbels 19, a torsion-resistant steel beam 7 is welded between the two box-shaped corbels 19 on the inner side. The upper and lower flanges and webs of corbel 19 are connected by equal-strength groove butt welding, and the two lifting points are connected into a whole through torsion-resistant steel beams. On one side of the project, the upper chord girder of the steel corridor truss 1 is used as the lifting support, and on the other side, the steel corbel protruding from the stiff column is used as the lifting support;

Step 10. Installation and commissioning of jack lifting equipment: Install jack 8 and other lifting devices on the box-shaped corbels 19 on both sides of the lifting point on the lifting bracket, and arrange hydraulic oil pumps and hydraulic control devices at the same time. Jack 8 is a core-through jack. It is equipped with a set of jacking presses for lifting, a set of jacking presses for anchoring, and a set of automatic tool anchors for safety. Various sensors are installed, equipment is connected, and on-site no-load debugging is carried out; two jacks are installed at each lifting point. The work is completed and controlled by a hydraulic oil pump, that is, 1# and 2# jacks are placed at one lifting point, 3# and 4# jacks are placed at one lifting point, and two lifting points are controlled by one oil pump; 5# , 6# jacks are placed at one lifting point; 7#, 8# jacks are placed at one lifting point, and two lifting points are controlled by one oil pump. Construction requires 2 hydraulic pump stations and 8 hydraulic jacks. In addition, it is equipped with 1 corresponding main control system, 2 sub-control boxes and several sensors and other equipment. During construction, the pump station is placed on the existing structure close to the construction operation point, and the electric switch box should be placed here; each group of pumps Personnel stand on the existing structure where the pump station is located; each group of surveyors must stand on the construction operation platform set up in advance, that is, at the lifting point, and one person observes one lifting point;

Step 11. Threading and pretensioning of the steel strand 6: the steel strand 6 passes through from top to bottom, and goes down through the box-shaped corbel 19 and the hanging point of the steel corridor truss 1, and then fixes it with the anchor 17 , the present embodiment uses Φ15.2mm 1860-grade steel strand 6 for lifting, and each jack 8 adopts 7 Φ15.2mm 1860-grade steel strand 6, and carefully checks the steel strand 6 for blanking, and there must be no rust or mud , dust, etc., to ensure safe and reliable lifting, according to the height of the steel corridor truss 1 that needs to be lifted and the height required by the lifting device, the steel strand 6 should be cut, and sufficient excess length should be ensured to facilitate the threading of the steel strand;

Step 12. The overall trial lifting of the steel corridor truss 1: proceed according to the steps during the trial lifting. If any abnormal phenomenon is found, stop immediately, analyze the cause, and continue after solving it; the construction personnel enter their respective positions, and all control instructions are issued by According to the instructions from the main console, the trial lifting time should be when all preliminary preparations have been completed, and a windless sunny morning should be selected according to the weather forecast. The trial lifting height is 30cm, the stabilization time is 1 hour, and the lifting speed is 5mm/min. Carry out a comprehensive inspection of the entire lifting system, take effective measures to ensure that each steel strand at each lifting point is evenly stressed, and prevent some steel strands from being in a state of slack or less stress. The steel strands with less force are individually tensioned by a jack to make them in a tensioned state, so as to achieve a state where each steel strand is evenly stressed. Safety stacks should be prepared during the lifting trial, which uses hot-rolled steel H300*300*10*15, with a length of 500mm, and a total of 8 safety stack pads are set; after the steel truss is separated from the assembled tire frame, the overall deflection of the steel truss needs to be adjusted Carry out measurement, and the synchronous lifting can only be carried out after the inspection is correct. At the lifting position, place a hanging scale at the corresponding position at the bottom of the four lifting points, and read the lifting value in real time. It is required that the horizontal deflection value is less than 5mm, and four The out-of-sync value of the lifting point is less than 5mm, and the items to be checked when trying to lift are shown in Table 1:

Table 1. List of inspection items when trying to lift

Step 13, the steel corridor truss 1 is formally lifted as a whole: after a trial lift, the overall inspection is correct and the lifting process is entered. Proceed according to the steps during the trial lifting. If any abnormal phenomenon is found, stop immediately, analyze the cause, and continue after solving it. Stop once every 2 meters during normal lifting, check whether the error between each point is controlled within 50mm, if the displacement difference is too large, supply oil to the slower lifting point separately to ensure the synchronization of each point, in order to ensure the synchronization of lifting, in A total station is added to the lifting site to measure the displacement difference of the structural lifting points. As an auxiliary measurement measure, steel rulers can be hung on the steel columns at the positions of the four lifting points. take elevation measurements;

Step 14. Elevate to the design structural elevation: When the overall steel corridor truss 1 is elevated to 50-150mm below the design elevation, stop the elevation;

Step 15. Elevation re-measurement and preparation before welding: Re-measure the overall situation of the steel corridor truss 1, which mainly includes the deflection of the steel corridor truss 1 and the height difference of the four lifting points of the steel truss. Retest the overall deviation of the steel corridor truss 1, and formulate corresponding correction measures. In this process, the construction personnel above and the equipment control personnel need to coordinate and act; the equipment control personnel adjust the equipment according to the measurement results of the construction personnel, and then adjust the steel. The four-point displacement of corridor truss 1 finally reaches the set elevation;

Step 16. Welding and forming, removal of tooling: As shown in Figure 8 and Figure 10, after the steel corridor truss 1 is lifted into place, the steel corridor truss 1 and the lifting frame are closed and connected, and the components at the closed place are installed by the tower crane, and the web is used The high-strength bolts are fixed, the upper and lower flanges of the steel beam are welded and connected, and finally the lifting equipment and tooling are disassembled. So far, the entire hoisting process is completed. The main force-bearing members of the first lifting frame 2 and the second lifting frame 3 are all original structural members, which are connected with the pre-embedded steel beam 1 41 or the pre-embedded steel beam 2 51 protruding from the main structure, and the connection nodes All are rigidly connected, the flange is welded with equal strength, and the web is connected with high-strength bolts. The rods on the lifting frame can be regarded as a part of the original steel corridor. After being lifted into place, each end is welded correspondingly to form a complete rigid corridor truss structure.

The technical features disclosed above are not limited to the disclosed combination with other features, and those skilled in the art can also make other combinations among the technical features according to the purpose of the utility model, which shall prevail in order to achieve the purpose of the utility model.

Claims (9)

1. A hoisting system for a large-scale steel corridor truss, used to lift the steel corridor truss (1) to a predetermined height of the main structure, the main structure includes the main structure one (2) and the main structure two located on both sides (3), characterized in that the lifting system includes a lifting point, a lifting point and a jack lifting device installed between them; The lifting points include the first lifting frame (4), the second lifting frame (5) and the torsion steel beam (7): The first lifting frame (4) includes two pre-embedded steel beams one (41) extending horizontally out of the main structure one (2). equal, and their ends are respectively set as the first lifting point (9) and the second lifting point (10); the ends of the first lifting point (9) and the second lifting point (10) are respectively Weld a box corbel (19) for fixing the jack (8); The second lifting frame (5) includes two pre-embedded steel beams one (41) extending horizontally out of the main structure two (3), and the embedded heights and overhanging lengths of the two pre-embedded steel beams two (51) are both are equal, and their ends are respectively set as the third lifting point (11) and the fourth lifting point (12); the ends of the third lifting point (11) and the fourth lifting point (12) are respectively Weld a box corbel (19) for fixing the jack (8); The torsion-resistant steel beam (7) is a horizontal beam body, and there are two in total, one is fixed between the two pre-embedded steel beams one (41) of the first lifting frame (4); the other is fixed on the second lifting frame (5) between the two pre-embedded steel beams two (51); The lifting points are set on the steel corridor truss (1), and there are four in total: The first lifting point (13) and the second lifting point (14) are located on the side of the steel corridor truss (1), respectively connected to the first lifting point (9) and the second lifting point (9) of the two frames of the first lifting frame (4). The two lifting points (10) correspond vertically; The third lifting point (15) and the fourth lifting point (16) are located on the other side of the steel corridor truss (1), respectively connected to the third lifting point (11) of the two frames of the second lifting frame (5) Corresponds vertically to the fourth lifting point (12); The jack lifting equipment includes a jack (8), a steel strand (6), a hydraulic oil pump and a hydraulic control device: There are 8 jacks (8) in total, 2 sets are set for each lifting point, and they are respectively fixed on the boxes on both sides of the four lifting points at the end of the embedded steel beam 1 (41) and the embedded steel beam 2 (51). Type corbel (19); The steel strand (6) passes through the beam body of the hoisting frame from top to bottom, goes down through the hanging point of the steel corridor truss (1) and fixes it with anchors (17); The hydraulic oil pump provides power for the core jack (8) and is used to drive the jack (8) to run; The hydraulic control device is used to control the operation of the jack (8). 2. The hoisting system of a large-scale steel corridor truss according to claim 1, characterized in that: two jacks (8) at each lifting point are arranged in parallel with each other. 3. The hoisting system of a large-scale steel corridor truss according to claim 1, characterized in that: the lifting points are set on the upper chord or middle chord of the steel corridor truss (1), and the locations of the lifting points are set temporarily Reinforcement rods are reinforced. 4. The hoisting system of a large-scale steel corridor truss according to claim 1, characterized in that: the torsion-resistant steel beam (7) is a box-shaped beam, and the two ends are respectively connected with two pre-embedded steel beams. (41) or two box-shaped corbels (19) full penetration welding between two pre-embedded steel beams two (51). 5. The hoisting system of a large-scale steel corridor truss according to claim 1, characterized in that: the first lifting frame (4) or the second lifting frame (5) also includes support on the embedded steel beam The truss facade brace one (42) between the outer end of one (41) and the main structure one (2) and the stiffness connected between the main structure one (2) and the truss facade brace one (42) Column corbel one (43). 6. The hoisting system of a large-scale steel corridor truss according to claim 1, characterized in that: the first lifting frame (4) or the second lifting frame (5) also includes support on the embedded steel beam The truss façade bracing 2 (52) between the outer end of the second (51) and the main structure 2 (3), the stiff column connected between the main structure 2 (3) and the truss façade bracing 2 (52) The second corbel (53), the vertical support (54) connected between the pre-embedded steel beam No. The transverse connecting rod (55) between the main structure two (3). 7. The hoisting system of a large-scale steel corridor truss according to claim 5 or 6, characterized in that: the height of the first lifting frame (4) or the second lifting frame (5) is equal to the height of a floor, The elevation of the pre-embedded steel beam one (41) or the pre-embedded steel beam two (51) is the same as that of the upper floor, and the truss facade diagonal brace one (42) or the truss facade diagonal brace two (52 ) is at the same level as the lower slab. 8. The hoisting system of a large-scale steel corridor truss according to claim 6, characterized in that: the height of the first lifting frame (4) or the second lifting frame (5) is equal to the height of two floors, so The elevation of the pre-embedded steel beam one (41) or the pre-embedded steel beam two (51) is the same as the elevation of the uppermost floor, and the truss facade diagonal brace one (42) or the truss facade diagonal brace two (52 ) is the same as that of the lowest floor, and the elevation of the transverse connecting rod (55) is the same as that of the middle floor. 9. The hoisting system of a large-scale steel corridor truss according to claim 5 or 6, characterized in that: the bottom end of the jack (8) is fixed to the upper end surface of the box-shaped corbel (19) by spot welding, Anchor limiting plates are welded around the anchorage (17) on the upper chord or the lower flange of the middle chord of the steel corridor truss (1).