CN111827678A - A hoisting method of truss steel structure at the top of a silo - Google Patents

Abstract

The invention discloses a silo top truss steel structure hoisting method, which is characterized in that a silo top truss steel structure is divided into a plurality of sections in advance, then temporary supports are erected on the top of a silo, subsection hoisting is started from the upper part of a silo top civil foundation in sequence, and parts of each section are assembled by means of the silo top temporary supports. The method for hoisting the steel structural parts of the truss on the top of the silo has good economical efficiency, reduces the construction difficulty and improves the construction efficiency and quality. The temporary support is used for assembling after hoisting the parts, the steel structure of the roof truss is stably installed, and the construction is safe and reliable. The parts are hoisted, the weight of the member is light, small hoisting machinery can be selected, and the construction cost is effectively controlled.

Description

A hoisting method of truss steel structure at the top of a silo

technical field

The invention belongs to the field of steel structure construction methods, in particular to a hoisting method for a truss steel structure at the top of a silo.

Background technique

At present, most of the silo roof steel structure installations are installed directly by the way of overall hoisting after ground assembly. The overall hoisting method is adopted. Since the overall truss is very heavy after being installed on the ground, large-scale hoisting machinery is required for hoisting. On the one hand, , During the hoisting process, the construction is difficult, the stability is difficult to guarantee, which affects the installation quality. On the other hand, large-scale mechanical hoisting is required, which wastes manpower and material resources.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a hoisting method for the truss steel structure on the top of the silo, which solves the problem of high difficulty in overall hoisting construction and difficult quality assurance in the prior art.

The present invention adopts the following technical solutions for solving the above-mentioned technical problems:

A method for hoisting a truss steel structure at the top of a silo. The truss steel structure at the top of a silo is divided into several sections in advance, and then temporary supports are erected on the top of the silo. The top temporary bracket assembles the components of each segment.

The truss steel structure at the top of each section of the silo includes uprights, lower chords, upper chords, webs, beams, and roof trusses. When hoisting, install the force-bearing uprights at both ends of the truss first, and install the uprights on the civil foundations on both sides of the silo. The foundation column, and then the beam and the roof truss connected to it are hoisted to form a door frame, and then the lower chord, beam, middle column, web rod, upper chord, and roof truss of adjacent sections are hoisted and installed in turn, until the construction of the truss on the top of the silo Finish.

Set the horizontal reference line mark on the side of the lower chord installation position.

The horizontal reference line is a steel wire, the straightness of the lower chord is adjusted with the steel wire as a reference, and the camber of the lower chord is adjusted by the jack on the temporary support.

Temporary brackets are used as the stress points for truss installation. All truss installations are completed. After checking, the temporary brackets are removed.

This hoisting method is suitable for double silo structure. When used in double silo structure, first hoist the truss steel structure segments above the adjacent cylinder walls of the two silos, and then hoist the truss steel structure segments above the cylinder walls at both ends. Then hoist the segment connected in the middle.

The truss steel structure at the top of each section of silo includes columns, lower chords, upper chords, webs, beams, and roof trusses. When hoisting, follow the steps below:

Step 1. Hoist the uprights on the civil foundation on the top of two adjacent silo walls as foundation uprights;

Step 2. Part of the beams and roof trusses between the hoisting foundation columns each form a portal frame;

Step 3. Hoist and install the lower chord, beam, middle column, web, upper chord and roof truss of the steel structure truss section between two adjacent silo walls in turn;

Step 4. Hoist the uprights on the top civil foundations at the other ends of the two silos as foundation uprights;

Step 5. The beams and roof trusses of the corresponding parts are hoisted to form door-shaped frames;

Step 6. With the temporary support as the force support, hoist the lower chord of the middle part of the truss, connect it into a whole, and then install the upper beam of the lower chord, the middle column, the web rod, the upper chord, and the roof truss in sequence;

Step 7. Adjust the camber of the lower chord with the help of the jack on the temporary support, and install the remaining components until the installation of the truss steel structure is completed, and then remove the temporary support.

Between steps 2 and 3, there is also a step of temporarily connecting the two sections into a whole by using shaped steel.

After the column and the door frame on the civil foundation are installed, when installing the lower chord, connect one end of the lower chord to the fixed column, and place the other end on the temporary support. The upper part of the temporary support is provided with a jack.

When hoisting the middle part, put the lower chord on the temporary support, and set up a jack below. After the truss steel structure is installed, remove the temporary support.

Compared with the prior art, the present invention has the following beneficial effects:

1. The hoisting method of the truss steel structure on the top of the silo has good economy, reduces the construction difficulty, and improves the construction efficiency and quality.

2. With the help of temporary brackets, the parts are hoisted and then assembled. The steel structure of the warehouse roof truss is installed smoothly and the construction is safe and reliable.

3. Bulk hoisting, the components are light in weight, and small hoisting machinery can be selected to effectively control the construction cost.

Description of drawings

Figure 1 is a schematic diagram of the arrangement of the silo roof truss steel structure of the present invention.

Fig. 2 is a schematic diagram of a section of a silo roof truss of the 1# silo of the present invention.

Fig. 3 is a schematic diagram of a segmented silo roof truss of the 2# silo of the present invention.

FIG. 4 is a cross-sectional view along A-A in FIG. 2 .

FIG. 5 is a schematic diagram of the distribution of the temporary support frame of the present invention.

FIG. 6 is a cross-sectional view taken along the line B-B in FIG. 5 .

Among them, the signs in the figure are: 1-column; 2-lower chord; 3-upper chord; 4-web; 5-beam; 6-roof; 7-temporary support frame; 8-jack; 9-truss; 10 - Silo top.

Detailed ways

The structure and working process of the present invention will be further described below in conjunction with the accompanying drawings.

A method for hoisting a truss steel structure at the top of a silo. The truss steel structure at the top of a silo is divided into several sections in advance, and then temporary supports are erected on the top of the silo. The top temporary bracket assembles the components of each segment.

Specific embodiment one,

A method for hoisting a truss steel structure at the top of a silo. The truss steel structure at the top of a silo is divided into several sections in advance, and each section of the truss steel structure at the top of a silo includes a column 1, a lower chord 2, an upper chord 3, a web 4, and a beam. 5. Roof truss 6. When hoisting, first install the force-bearing columns at both ends of the truss, install the column 1 on the civil foundation on both sides of the silo as the foundation column, and then hoist the beam 5 and the roof truss 6 connected to it to form a door shape. frame, and then hoist and install the lower chord, beam, middle column, web, upper chord, and roof truss of adjacent sections in sequence until the construction of the truss 9 on the top of the silo is completed.

Set the horizontal reference line mark on the side of the lower chord installation position.

The horizontal reference line is a steel wire, the straightness of the lower chord is adjusted with the steel wire as a reference, and the camber of the lower chord is adjusted by the jack 8 on the temporary support.

Temporary brackets are used as the stress points for truss installation. All truss installations are completed. After checking, the temporary brackets are removed.

This hoisting method is suitable for double silo structure. When used in double silo structure, first hoist the truss steel structure segments above the adjacent cylinder walls of the two silos, and then hoist the truss steel structure segments above the cylinder walls at both ends. Then hoist the segment connected in the middle.

The truss steel structure at the top of each section of silo includes columns, lower chords, upper chords, webs, beams, and roof trusses. When hoisting, follow the steps below:

Step 1. Hoist the uprights on the civil foundation on the top of two adjacent silo walls as foundation uprights;

Step 2. Part of the beams and roof trusses between the hoisting foundation columns each form a portal frame;

Step 3. Hoist and install the lower chord, beam, middle column, web, upper chord and roof truss of the steel structure truss section between two adjacent silo walls in turn;

Step 4. Hoist the uprights on the top civil foundations at the other ends of the two silos as foundation uprights;

Step 5. The beams and roof trusses of the corresponding parts are hoisted to form door-shaped frames;

Step 6. With the temporary support as the force support, hoist the lower chord of the middle part of the truss, connect it into a whole, and then install the upper beam of the lower chord, the middle column, the web rod, the upper chord, and the roof truss in sequence;

Step 7. Adjust the camber of the lower chord with the help of the jack on the temporary support, and install the remaining components until the installation of the truss steel structure is completed, and then remove the temporary support.

Specific embodiment two, as shown in Figure 1 to Figure 6,

The scheme is introduced in detail by taking the sectioned hoisting of the top truss of double silos as an example.

The truss 9 on the top of the silo is divided into 9 sections from right to left for hoisting, and each section is connected with high-strength bolts.

First make all the components of the truss such as columns in the processing plant, mark the component numbers, check the processing quality, and then transport them to the site;

According to the installation position of the components on the drawing, place the components in the corresponding position on the ground under the silo to facilitate hoisting.

Make preparations for hoisting on the top of the silo, process and set up a temporary support frame 7 according to the drawings, and place a jack 8 on the support frame; pull a steel wire beside the truss installation base as a control wire for hoisting.

When hoisting, use the temporary support frame 7 to carry the weight of the truss, put the lower chord 2 on the temporary support frame 7, and then install the column 1, the upper chord 3, the web rod 4, the beam 5, the roof truss 6 and other components above the lower chord in sequence, When hoisting, use the jack 8 to adjust the camber of the truss.

The operation process is as follows:

1) According to the drawings, place a temporary support frame 7 under the installation position of the truss suspended column 1, install a jack 8 on the temporary support frame 7, and set a steel wire next to the installation position of the lower chord 2.

2) First hoist the columns 1, the beams 5 and the roof trusses 6 of the third and fourth sections located on the civil foundation to form a door frame respectively.

3) Hoist the part of the fourth section between the two silos, and temporarily connect the fourth section and the third section as a whole with section steel.

4) Hoist the fifth section lower chord 2, one end is connected to the fourth section column 1, the other end is placed on the temporary support frame 7 and the jack 8, and then hoist the beam, 5, the rest of the column 1, the web 4, the upper chord 3 , Roof 6.

5) Hoist the third section lower chord 2, one end is connected with the third section column 1, and the other end is placed on the temporary support frame 7 and the jack 8. And in turn hoist the beam 5, the remaining columns 1, the web 4, the upper chord 3, and the roof truss 6.

6) Hoist the eighth, ninth and first sections of the upright column 1, the beam 5, and the roof truss 6 on the foundation of the civil construction, to form a door frame respectively. Then put the lower chord 2 on the temporary support frame 7 and the jack 8, and hoist the beam 5, the remaining columns 1, the web 4, the upper chord 3, and the roof truss 6 in turn.

7) Hoist the second, sixth and seventh sections of the middle part of the silo roof. The lower chord 2 is placed on the temporary support frame 8 and the jack 8, and the beam 5 is hoisted in sequence, and the remaining columns 1, web 4, and upper chord 3. Roof truss 6.

The lower chord 2 and the upper chord 3 of the above sections are connected as a whole by high-strength bolts, the camber of the lower chord is adjusted by the jack 8, and the straightness of the chord is adjusted with the steel wire as a reference.

After the hoisting of the components is completed, check the connection and tightness, and remove the temporary support frame if there is no error.

Using this hoisting method has the following advantages:

1. High construction efficiency and reduce construction difficulty.

2. The steel structure of the warehouse roof truss is installed smoothly, and the construction is safe and reliable.

3. Bulk hoisting, the components are light in weight, small hoisting machinery can be selected, and the economy is good.

The present invention and its features, features and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like numbers refer to like parts throughout the drawings. The drawings may not be drawn to scale, emphasis instead being placed upon illustrating the subject matter of the present invention.

The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in ordinary ways in the art; any person skilled in the art, without departing from the present invention Within the scope of the technical solution of the invention, many possible changes and modifications can be made to the technical solution of the present invention by using the methods and technical contents disclosed above, or modified into equivalent embodiments with equivalent changes, which does not affect the essence of the present invention. . Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still fall within the protection scope of the technical solutions of the present invention.

Claims (10)

1. A method for hoisting a truss steel structure at the top of a silo, characterized in that: the truss steel structure at the top of the silo is divided into several sections in advance, and then a temporary support is erected on the top of the silo, and sections are successively started from above the civil foundation on the top of the silo Hoist and assemble the components of each section with the help of temporary supports on the top of the silo. 2. The silo top truss steel structure hoisting method according to claim 1 is characterized in that: each section of the silo top truss steel structure comprises a column, a lower chord, an upper chord, a web, a beam, and a roof truss, and during hoisting, First install the force-bearing columns at both ends of the truss, install the columns on the civil foundations on both sides of the silo as the foundation columns, and then hoist the beams and roof trusses connected to them to form a portal frame, and then hoist and install the adjacent sections in turn. Lower chord, beam, middle column, web, upper chord, roof truss, until the silo top truss construction is completed. 3 . The method for hoisting the truss steel structure at the top of the silo according to claim 2 , wherein a horizontal reference line mark is set on the side of the installation position of the lower chord. 4 . 4. The method for hoisting the truss steel structure at the top of a silo according to claim 3, wherein the horizontal reference line is a steel wire, the straightness of the lower chord is adjusted with the steel wire as a reference, and the camber of the lower chord is adjusted by Jack adjustment on temporary stand. 5. The method for hoisting the truss steel structure at the top of the silo according to claim 2, characterized in that: a temporary support is used as the stress point of the truss installation, all the trusses are installed, and the temporary support is removed after checking. 6. The method for hoisting a truss steel structure at the top of a silo according to claim 1, wherein the hoisting method is suitable for a double silo structure, and when used in a double silo structure, the adjacent walls of the two silos are first hoisted The upper truss steel structure segment is hoisted, and then the truss steel structure segment above the cylinder walls at both ends is hoisted, and then the middle connected segment is hoisted. 7. The method for hoisting a truss steel structure at the top of a silo according to claim 6, wherein each section of the truss steel structure at the top of the silo comprises a column, a lower chord, an upper chord, a web, a beam, and a roof truss, and during hoisting, Follow these steps: Step 1. Hoist the uprights on the civil foundation on the top of two adjacent silo walls as foundation uprights; Step 2. Part of the beams and roof trusses between the hoisting foundation columns each form a portal frame; Step 3. Hoist and install the lower chord, beam, middle column, web, upper chord and roof truss of the steel structure truss section between two adjacent silo walls in turn; Step 4. Hoist the uprights on the top civil foundations at the other ends of the two silos as foundation uprights; Step 5. The beams and roof trusses of the corresponding parts are hoisted to form door-shaped frames; Step 6. With the temporary support as the force support, hoist the lower chord of the middle part of the truss, connect it into a whole, and then install the upper beam of the lower chord, the middle column, the web rod, the upper chord, and the roof truss in sequence; Step 7. Adjust the camber of the lower chord with the help of the jack on the temporary support, and install the remaining components until the installation of the truss steel structure is completed, and then remove the temporary support. 8 . The method for hoisting the truss steel structure at the top of the silo according to claim 7 , wherein the step between step 2 and step 3 further comprises the step of temporarily connecting the two sections into a whole by using profiled steel. 9 . 9. The method for hoisting the truss steel structure at the top of the silo according to claim 7, characterized in that: after the column and the door frame on the civil foundation are installed, when installing the lower chord, one end of the lower chord is connected to the fixed column. Connect, put the other end on a temporary bracket, and set a jack on the upper part of the temporary bracket. 10. The method for hoisting the truss steel structure at the top of the silo according to claim 9, characterized in that: when the middle part is hoisted, the lower chord is placed on the temporary support, and a jack is arranged below, and after the truss steel structure is installed, it is removed. Temporary stand.

Images