CN115573582A - A method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses - Google Patents

Abstract

The invention discloses an unequal-height steel column elevation adjusting method for horizontal sliding construction of a steel truss, which comprises the following steps of: step 1: selecting a construction standard, and designing and installing other structures by taking a standard structure as a reference; step 2: install a plurality of adjusting shim plates 8 additional between the top of steel column and track 5 so that track 5 is the level setting, step 3: after the truss slides in place, measures are taken to remove the sliding shoes 6 at the bottom of the truss support 1, remove the rails 5, remove the adjusting shim plate 8, install the cast steel support 3, unload the truss 13 and finally remove the sliding steel beam; the invention has the advantages of ingenious design, simple operation, safety and stability, and wide application prospect in the sliding construction of the large-span steel truss.

Description

A method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses

technical field

The invention relates to the technical field of steel truss installation, in particular to a method for adjusting the elevation of unequal-height steel columns used in the horizontal sliding construction of steel trusses.

Background technique

With the development of building construction technology, steel structures are increasingly favored by the market and widely used in In various building structure fields, and with the continuous rise of many airports, stations, stadiums and other buildings, steel truss structures have developed rapidly. This type of structure usually has a large span, which can meet the space requirements of the building function. During the sliding construction of the steel truss, usually, the original structural column is used for the sliding construction of the steel truss, and the elevation of the top of the steel column is generally It is consistent, but when the elevation of the top of the steel column (it can also be said to be the elevation of the bottom of the truss support) is inconsistent, this brings great difficulties to the horizontal and linear sliding of the steel truss, and it is even impossible to use the sliding The construction plan is to make the steel truss move horizontally and straightly, even if the track of the steel truss is on the same plane, the existing method is to pre-bury the temporary support bar, and the top of the support bar is on the same plane, then the track is on the same plane, or adopt the lifting method The heavy equipment supports the track so that the track is on the same plane. The disadvantages of the existing method are: the use of temporary support rods to support the track requires the installation and disassembly of the support frame, and the reinforcement of the bottom of the temporary support rod by the concrete structure, which increases the expenditure. And when the temporary support rods are removed, the difficulty of disassembly and assembly will be increased. When the lifting equipment is used to temporarily support the track, the limitation of the site is limited. Some construction sites are not large enough, and the lifting equipment cannot support the track for a long time on the site, and The equipment has been being constructed on site, and the cost is high, and the lifting height and lifting weight of the lifting equipment are high. For example, the Chinese patent application number 201820335853 . The sliding construction system includes lifting equipment, a sliding structure, a sliding support and a pushing system. The sliding structure includes a track and a sliding shoe. Ejector and hydraulic output system, the patented lifting equipment supports the rails so that the rails are on the same plane to ensure that the sliding support moves along a straight line. The disadvantage of this patent is that the lifting equipment is used to ensure that the rails are on the same plane. But if the construction site of this patent is less, still can be that the use of hoisting equipment is restricted, and hoisting equipment can't carry out the long-time supporting track of site, and equipment is always on-site construction, and expense is higher.

Therefore, it is worth studying to provide a method for adjusting the height of steel columns with different heights for the horizontal sliding construction of steel trusses by adjusting the height of the steel columns of the original structure so that the rails are in the horizontal plane. question.

Contents of the invention

The object of the present invention is to provide a steel column elevation adjustment method for steel truss horizontal sliding construction using the steel column of the original structure and adjusting the height of the steel column of the original structure so that the track is in the horizontal plane.

The purpose of the present invention is achieved like this:

A method for adjusting the elevation of unequal-height steel columns for the horizontal sliding construction of steel trusses, comprising the following steps: Step 1: Select a construction datum, and use the datum structure as a reference to design and install other structures; Add some adjusting pads 8 between the top and the track 5 so that the track 5 is set horizontally. The specific operation is as follows: the bottom of the truss support 1 on the upper part of the steel column 2 is provided with a sliding shoe 6, and the sliding track 5 is arranged under the sliding shoe 6. , the sliding steel beam 4 between the steel columns is set at the bottom of the track 5, and the gap between the top of the steel column 2 and the track 5 is set with a multi-layer adjusting backing plate 8; Step 3: After the truss slides in place, take measures to remove it The sliding shoe 6 at the bottom of the truss support 1, remove the track 5, remove the adjustment backing plate 8, install the cast steel support 3, unload the truss 13, and finally remove the sliding steel beam 4.

The specific operation of said step 1 is as follows: select the first steel column 2-1 with the lowest column top elevation as a benchmark, the column top elevation 9-1 of the first steel column 2-1 as a benchmark, and the first steel column 2-1 The steel column with little difference in column top elevation is the third steel column 2-3, and H3<h1-h2, H3 is the column top elevation difference between the third steel column 2-3 and the first steel column 2-1 , h1 is the height of the cast steel support, h2 is the height of the track; the height difference from the top of the first steel column 2-1 is the second steel column 2-2, H1>h1-h2; H1 is the same as the first steel column 2 -1 The height of the top section 2-2-U of the second steel column 2-2 with a large difference in column top elevation, h1 is the height of the cast steel support, and h2 is the height of the track.

When the steel column that is not much different from the column top elevation of the first steel column 2-1 is the third steel column 2-3, and H3<h1-h2, the specific operation of step 2 is as follows: in the first steel column 2- 1. The bottom of the first truss support 1-1 on the upper part is equipped with normal sliding shoes 6-1. The thickness of the sliding shoes is 20~30mm, which is equivalent to the overall elevation of the truss 13 by 20~30mm during the sliding construction, which is convenient for sliding on the truss 13. Install the cast steel support 3 afterwards; the column top elevation of the third steel column 2-3 is higher than the column top elevation of the first steel column 2-1, and the third truss support 1-3 will also be raised, and the raised part adopts Thickened sliding shoe 6-3 treatment, the gap between the bottom of the track 5 and the top of the first steel column 2-1 is set by adjusting the backing plate 8, and the gap between the bottom of the track 5 and the top of the third steel column 2-3 is adjusted The backing plate 8 is laid until the upper surface of the adjusting backing plate (8) of the first steel column 2-1 and the upper surface of the adjusting backing plate 8 of the third steel column 2-3 are on the same plane.

When the steel column with the same elevation as the first steel column 2-1 is the third steel column 2-3, and H3<h1-h2, the specific operation of step 3 is as follows: After the truss 13 slides into place, Take measures to remove the thickened sliding shoe 6-3 at the bottom of the third cast steel support 1-3 and the normal sliding shoe 6-1 at the bottom of the first cast steel support 1-1, remove the track 5, and remove the third steel column 2 -3 top adjustment backing plate 8 and the first steel column 2-1 top adjustment backing plate 8, install the cast steel support 3, unload the truss 13, and finally remove the sliding steel beam 4.

When the height difference from the top of the first steel column 2-1 is the second steel column 2-2, H1>h1-h2, the specific operation of step 2 is as follows: temporarily divide the second steel column 2-2 into two sections , only the bottom section 2-2-D is installed during the sliding construction, and the upper section 2-2-U is installed after the sliding is completed, and the track 5 is dismantled; The height between the bottom of the two truss supports 1-2 and the track 5 is realized by increasing the slide shoe 6-2, and the heightening slide shoe 6-2 and the truss support 1-1 are provided with a horizontal connecting rod 7.

When the height difference from the top of the first steel column 2-1 is the second steel column 2-2, H1>h1-h2, the specific operation of step 3 is as follows: After the truss 13 slides into place, take measures to remove the second steel column 2-2. The heightened sliding shoe 6-2 at the bottom of the cast steel support 1-2 and the normal sliding shoe 6-1 at the bottom of the first cast steel dry support 1-1, remove the track 5, and remove the top adjustment pad of the second steel column 2-2 The plate 8 and the top of the first steel column 2-1 adjust the backing plate 8, install the cast steel support 3, unload the truss 13, and finally remove the sliding steel beam 4.

The thickness of the normal sliding shoe is 20-30mm.

Positive and beneficial effects: the present invention ensures that the upper steel truss slides along a horizontal straight line by processing the height of the original structural steel column top, effectively solving the problem of using the original unequal-height steel columns for linear sliding; the design of the present invention is ingenious , easy to operate, safe and stable, and has broad application prospects in the sliding construction of large-span steel trusses.

Description of drawings

Fig. 1 is the structural representation of applicable condition of the present invention;

Fig. 2 is the structural representation of steel column elevation adjustment method of the present invention;

Fig. 3 is the structural representation after steel truss installation of the present invention;

In the figure: truss support 1, first truss support 1-1, second truss support 1-2, third truss support 1-3, steel column 2, first steel column 2-1, second steel column Column 2-2, third steel column 2-3, cast steel support 3, sliding steel beam 4, track 5, sliding shoe 6, normal sliding shoe 6-1, heightened sliding shoe 6-2, thickened sliding Boot 6-3, horizontal connecting rod 7, adjusting backing plate 8, elevation 9, first steel column 2-1 column top elevation 9-1, sliding steel beam top elevation 9-2, track top elevation 9-3, The height difference H1 between the second steel column 2-2 which is quite different from the top elevation of the first steel column 2-1, and the second steel column 2-2 which is quite different from the top elevation of the first steel column 2-1 The height H2 of the top section 2-2-U of 2, and the height difference H3 between the third steel column 2-3 which has a small difference in elevation from the top of the first steel column 2-1.

detailed description

The present invention will be further described below in conjunction with drawings and embodiments.

A method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses, comprising the following steps: Step 1: Select a construction datum, use the datum structure as a reference, design and install other structures, and select the first column with the lowest elevation A steel column 2-1 is used as the reference, the column top elevation 9-1 of the first steel column 2-1 is used as the reference, and the steel column with the same elevation as the first steel column 2-1 is the third steel column 2 -3, and H3<h1-h2, H3 is the column top elevation difference between the third steel column 2-3 and the first steel column 2-1, h1 is the height of the cast steel support, h2 is the track height; The steel column 2-1 with a large difference in the top elevation is the second steel column 2-2, H1>h1-h2; H1 is the second steel column 2-2 with a large difference in the top elevation of the first steel column 2-1 The height of the top section of the 2-2-U, h1 is the height of the cast steel support, and h2 is the height of the track.

Step 2: Add some adjusting pads 8 between the top of the steel column and the track 5 to make the track 5 horizontal. The specific operation is as follows: set the sliding shoe 6 at the bottom of the truss support 1 on the upper part of the steel column 2, and the sliding shoe 6 The sliding track 5 is arranged below, the sliding steel beam 4 between the steel columns is set at the bottom of the track 5, and the gap between the top of the steel column 2 and the track 5 is provided with a multi-layer adjusting backing plate 8.

Step 3: After the truss slides in place, take measures to remove the sliding shoe 6 at the bottom of the truss support 1, remove the track 5, remove the adjustment pad 8, install the cast steel support 3, unload the truss 13, and finally remove the sliding steel beam 4 .

Example 1

The roof truss 13 is supported on the top of the steel column 2 through the truss support 1 and the cast steel support 3;

Select the first steel column 2-1 as the benchmark, and the first steel column 2-1 column top elevation 9-1 as the benchmark;

When the steel column with the same elevation as the first steel column 2-1 is the third steel column 2-3, and H3<h1-h2, the specific operation is as follows:

Step 1: Select the construction datum, use the datum structure as a reference, design and install other structures, select the first steel column 2-1 with the lowest column top elevation as the datum, and the column top elevation of the first steel column 2-1 is 9- 1 as the benchmark, the steel column with the same elevation as the first steel column 2-1 is the third steel column 2-3, and H3<h1-h2, H3 is the third steel column 2-3 and the first steel column The elevation difference of the top of the steel column 2-1, h1 is the height of the cast steel support, and h2 is the height of the track; Step 2: Set a normal slide at the bottom of the first truss support 1-1 on the upper part of the first steel column 2-1 The shoe 6-1, the thickness of the normal sliding shoe 6-1 is 20~30mm, which is equivalent to the overall elevation of the truss 13 by 20~30mm during the sliding construction, which is convenient for installing the cast steel support 3 after the sliding of the truss 13 is completed; the third The column top elevation of the steel column 2-3 is higher than the column top elevation of the first steel column 2-1, and the third truss support 1-3 will also be raised, and the raised part is treated with a thicker sliding shoe 6-3, The gap between the bottom of the track 5 and the top of the first steel column 2-1 is set with an adjusting backing plate 8, and the gap between the bottom of the track 5 and the top of the third steel column 2-3 is set with an adjusting backing plate 8 until the first steel column The upper surface of the adjustment backing plate 8 of the column 2-1 is on the same plane as the upper surface of the adjustment backing plate 8 of the third steel column 2-3;

Step 3: After the truss 13 slides into place, take measures to remove the thickened sliding shoe 6-3 at the bottom of the third cast steel support 1-3 and the normal sliding shoe 6-1 at the bottom of the first cast steel dry support 1-1, Remove the track 5, remove the top adjustment pad 8 of the third steel column 2-3 and the top adjustment pad 8 of the first steel column 2-1, install the cast steel support 3, and unload the truss 13.

Example 2

The surface truss 13 is supported on the top of the steel column 2 through the truss support 1 and the cast steel support 3;

Select the first steel column 2-1 as the benchmark, and the first steel column 2-1 column top elevation 9-1 as the benchmark;

The second steel column 2-2 is the second steel column 2-2 when the height difference from the top of the first steel column 2-1 is large, H1>h1-h2;

Specific steps are as follows:

Step 1: Select the construction datum and use the datum structure as a reference to design and install other structures. Select the first steel column 2-1 with the lowest column top elevation as the datum, and the first steel column 2-1 column top elevation 9-1 As a benchmark, the second steel column 2-2 is the one with the largest difference in elevation from the top of the first steel column 2-1, H1>h1-h2; H1 is the second steel column with a large difference in elevation from the top of the first steel column 2-1 The height of the top section 2-2-U of the second steel column 2-2, h1 is the height of the cast steel support, and h2 is the height of the track.

Step 2: Set the normal sliding shoe 6-1 at the bottom of the first truss support 1-1 on the upper part of the first steel column 2-1. The overall elevation is 20~30mm, which is convenient for installing the cast steel support 3 after the sliding of the truss 13 is completed; the column top elevation of the third steel column 2-3 is higher than that of the first steel column 2-1, and the third The seat 1-3 will also be raised, and the second steel column 2-2 is temporarily divided into two sections. During the sliding construction, only the bottom section 2-2-D is installed. After the upper section 2-2-U is finished sliding, the track 5 Reinstall after dismantling; the subsection position is at the bottom elevation 9-2 of the track 5; -2 and truss support 1-1 add horizontal connecting rod 7.

Step 3: After the truss 13 slides into place, take measures to remove the heightened sliding shoe 6-2 at the bottom of the second cast steel support 1-2 and the normal sliding shoe 6-1 at the bottom of the first cast steel dry support 1-1, Remove the track 5, remove the top adjustment pad 8 of the second steel column 2-2 and the top adjustment pad 8 of the first steel column 2-1, install the cast steel support 3, and unload the truss 13.

The present invention ensures that the upper steel truss slides along a horizontal straight line by processing the height of the original structural steel column top, effectively solving the problem of using the original unequal-height steel columns for linear sliding; the present invention is ingenious in design and simple in operation. It is safe and stable, and has broad application prospects in the sliding construction of large-span steel trusses.

Claims (7)

1. A method for adjusting the elevation of unequal-height steel columns for steel truss horizontal sliding construction, characterized in that: comprise the following steps: Step 1: choose the benchmark of construction, take the benchmark structure as a reference, design and install other structures; step 2: Add some adjusting pads 8 between the top of the steel column and the track (5) to make the track (5) horizontal, the specific operation is as follows: the bottom of the truss support (1) on the upper part of the steel column (2) is set Sliding shoe (6), sliding track (5) is set under the sliding shoe (6), the sliding steel beam (4) between the steel columns is set at the bottom of the track (5), the top of the steel column (2) and the track ( 5) The gap between them is set with multi-layer adjustment backing plate 8; Step 3: After the truss slides in place, take measures to remove the sliding shoe (6) at the bottom of the truss support (1), remove the track (5), and remove the adjustment Install the backing plate (8), install the cast steel support (3), unload the truss (13), and finally remove the sliding steel beam (4). 2. The method for adjusting the elevation of unequal-height steel columns for steel truss horizontal sliding construction according to claim 1, characterized in that: the specific operation of the step 1 is as follows: select the first steel column with the lowest column top elevation (2 -1) as the benchmark, the first steel column (2-1) column top elevation (9-1) as the benchmark, the steel column with the same column top elevation as the first steel column (2-1) is the third steel column Column (2-3), and H3<h1-h2, H3 is the elevation difference between the third steel column 2-3 and the first steel column 2-1, h1 is the height of the cast steel support, and h2 is the height of the track ; The height difference from the top of the first steel column (2-1) is the second steel column (2-2), H1>h1-h2; H1 is the difference in height from the top of the first steel column (2-1) The height of the top section (2-2-U) of the larger second steel column (2-2), h1 is the height of the cast steel support, and h2 is the height of the track. 3. The method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses according to claim 2, characterized in that: when the steel column with the same elevation as the top of the first steel column (2-1) is the third steel column (2-3), and H3<h1-h2, the specific operation of step 2 is as follows: set The normal sliding shoe (6-1) is convenient for installing the cast steel support (3) after the truss (13) slides; the column top elevation of the third steel column (2-3) is higher than that of the first steel column (2- 1) The elevation of the top of the column, the third truss support (1-3) will also be raised, and the raised part shall be treated with thickened sliding shoes (6-3), and the bottom of the track (5) and the first steel column (2 -1) The gap at the top of the column is set with the adjusting backing plate (8), and the gap between the bottom of the track (5) and the top of the third steel column (2-3) is set with the adjusting backing plate (8) until the first steel column The upper surface of the adjusting backing plate (8) of the column (2-1) is on the same plane as the upper surface of the adjusting backing plate (8) of the third steel column (2-3). 4. The method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses according to claim 2, characterized in that: when the steel column with the same elevation as the top of the first steel column (2-1) is the third steel column (2-3), and H3<h1-h2, the specific operation of step 3 is as follows: After the truss 13 slides into place, take measures to remove the reinforcement at the bottom of the third cast steel support (1-3). Thick sliding shoe (6-3) and normal sliding shoe (6-1) on the bottom of the first cast steel dry support (1-1), remove the track (5), remove the adjustment pad on the top of the third steel post (2-3) Plate (8) and the top of the first steel column (2-1) adjust the backing plate (8), install the cast steel support (3), unload the truss (13), and finally remove the sliding steel beam (4). 5. The method for adjusting the elevation of unequal-height steel columns for the horizontal sliding construction of steel trusses according to claim 2, characterized in that: when the elevation of the top of the first steel column (2-1) differs greatly from that of the first steel column (2-1), it is the second steel column Column (2-2), when H1>h1-h2, the specific operation of step 2 is as follows: set normal sliding shoes (6 -1), it is convenient to install the cast steel support (3) after the truss (13) slides; the column top elevation of the second steel column (2-2) is higher than the column top elevation of the first steel column (2-1) , the second truss support (1-2) will also be raised, and the second steel column (2-2) will be temporarily divided into two sections. During the sliding construction, only the bottom section (2-2-D) will be installed, and the upper section ( 2-2-U) After the sliding is completed, remove the track (5) and install it again; the subsection position is at the bottom elevation (9-2) of the track (5); the bottom of the second truss support (1-2) is in contact with the track The height between (5) is realized by heightening the sliding shoe (6-2), and a horizontal connecting rod (7) is added to the heightening sliding shoe (6-2) and the truss support (1-1). 6. The method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses according to claim 2, characterized in that: when the elevation difference between the first steel column (2-1) and the top elevation of the first steel column (2-1) is large, it is the second steel column For the column (2-2), when H1>h1-h2, the specific operation of step 3 is as follows: after the truss 13 slides into place, take measures to remove the heightening shoe (6 -2) and the normal sliding shoe (6-1) at the bottom of the first cast steel dry support (1-1), remove the track (5), remove the top adjustment backing plate (8) of the second steel column (2-2) and Adjust the backing plate (8) on the top of the first steel column (2-1), install the cast steel support (3), unload the truss (13), and finally remove the sliding steel beam (4). 7. The method for adjusting the elevation of unequal-height steel columns for horizontal sliding construction of steel trusses according to claim 2, characterized in that: the normal sliding shoe (6-1) has a thickness of 20-30mm.

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