CN113431346B - Slippage jig frame for large-span steel truss construction and construction method - Google Patents
Slippage jig frame for large-span steel truss construction and construction method Download PDFInfo
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- CN113431346B CN113431346B CN202110869959.9A CN202110869959A CN113431346B CN 113431346 B CN113431346 B CN 113431346B CN 202110869959 A CN202110869959 A CN 202110869959A CN 113431346 B CN113431346 B CN 113431346B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 170
- 239000010959 steel Substances 0.000 title claims abstract description 170
- 238000010276 construction Methods 0.000 title claims abstract description 59
- 238000001514 detection method Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000009415 formwork Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011295 pitch Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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Abstract
The invention relates to the technical field of building construction, and provides a sliding jig frame for large-span steel truss construction and a construction method, wherein the sliding jig frame comprises a body, a first frame body and a second frame body, wherein the first frame body and the second frame body are vertically arranged, and a preset interval is reserved between the first frame body and the second frame body; the track beam is arranged on the first frame body and the second frame body in a crossing mode, the track beam comprises a first beam body and a second beam body which are arranged in parallel, and the first beam body can move in the direction close to or far away from the second beam body; and the supporting piece is arranged on the track beam and is suitable for supporting the steel truss. According to the sliding jig frame, the track beam can be adjusted along the extending direction of the steel truss, and the distance between the first beam body and the second beam body can be adjusted. So set up, need not to set up the not support that the bed-jig that slides of size of multiunit can adapt to the steel truss of different spans, be favorable to reducing construction cost.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a sliding jig frame for large-span steel truss construction and a construction method.
Background
Steel truss structures are widely used for their high stiffness, high strength, good geometric properties and hydrodynamic properties.
In the construction process of a building which is built by taking a steel truss as a main body, corresponding sliding formworks are usually arranged to assist construction according to the span and the truss spacing of the steel truss. However, in the actual construction process, because of receiving the topography influence, sometimes some barriers need be dodged to the building, lead to the span of steel truss to change, this demand that just needs the not unidimensional bed-jig that slides of multiunit to adapt to different construction sections, and the construction cost can be increased undoubtedly to the extra multiunit bed-jig that slides that sets up.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that in the construction process of a building which is constructed by taking a steel truss as a main body in the prior art, due to the change of the span of the steel truss, a plurality of groups of sliding formworks with different sizes are needed to adapt to the requirements of different construction sections, and the construction cost is undoubtedly increased by additionally arranging a plurality of groups of sliding formworks, so that the sliding formworks and the construction method for constructing the large-span steel truss are provided.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides a sliding jig frame for large-span steel truss construction, which comprises a body, a first frame body and a second frame body, wherein the first frame body and the second frame body are vertically arranged, and a preset interval is reserved between the first frame body and the second frame body; the track beam is arranged on the first frame body and the second frame body in a crossing mode, the track beam comprises a first beam body and a second beam body which are arranged in parallel, and the first beam body can move in the direction close to or far away from the second beam body; and the supporting piece is arranged on the track beam and is suitable for supporting the steel truss.
Further, the sliding jig frame for the large-span steel truss construction further comprises an inclined rod; one side surface of the first frame body, which is back to the second beam body, is provided with an inclined rod, one end of the inclined rod is connected with the first frame body, and the other end of the inclined rod is connected with one surface of the first beam body, which is back to the support piece; the second support body is back to a side face of the second beam body and is provided with an inclined rod, one end of the inclined rod is connected with the second support body, and the other end of the inclined rod is connected with one face, back to the support piece, of the first beam body.
Further, the preset interval is not less than 20 m.
The invention also provides a construction method for the large-span steel truss, which at least comprises the following steps: installing a sliding jig frame; installing a sliding track; when hoisting for the first time, respectively hoisting two independent steel trusses to the sliding jig frame, and connecting the two independent steel trusses into a whole by using a connecting piece; sliding the integrally connected steel trusses to enable the previous steel truss to be separated from the sliding jig frame, hoisting the next steel truss to the sliding jig frame again, connecting the next steel truss and the previous steel truss into a whole by using the connecting piece, and repeating the operation until the steel trusses with the same span are constructed; and constructing the steel truss with another span.
Further, the mounting and sliding jig specifically comprises; and four sliding jig frames are arranged on the ground at intervals along the extension direction of the single steel truss and are respectively marked as an A jig frame, a B jig frame, a C jig frame and a D jig frame.
Further, the installation sliding rail specifically includes: two end parts of the steel truss are respectively provided with a sliding track; and a sliding track is respectively arranged on the jig frame B and the jig frame C.
Further, the sliding the integrally connected steel trusses to separate the previous steel truss from the sliding jig specifically comprises: separating the supporting pieces on the jig frame A, the jig frame B, the jig frame C and the jig frame D from the steel truss, enabling the steel truss to slide for the first time along the four sliding tracks, and after sliding to a preset distance, hanging cables and performing first tensioning operation; and separating the sliding tracks on the jig frame B and the jig frame C from the steel truss, and performing second sliding on the steel truss along the remaining two sliding tracks until the previous steel truss is separated from the sliding jig frame.
Further, the construction method for the large-span steel truss further comprises the following steps: and after each steel truss slides to the target position, separating the two ends of the steel truss from the sliding track, and installing the support.
Further, the construction method for the large-span steel truss further comprises the following steps: and performing second tensioning operation on the hanging rope.
Further, the construction method for the large-span steel truss further comprises the following steps: and (4) setting a detection point position, and monitoring the transverse offset and the downwarping amount of the steel truss.
The technical scheme of the invention has the following advantages:
according to the slippage jig frame for the large-span steel truss construction, the distance between the first beam body and the second beam body of the track beam can be adjusted along the extending direction of the steel truss, when the steel truss with larger span needs to be supported, the distance between the first beam body and the second beam body can be reduced, and when the steel truss with smaller span needs to be supported, the distance between the first beam body and the second beam body can be increased. So set up, need not to set up the not support that the bed-jig that slides of size of multiunit can adapt to the steel truss of different spans, be favorable to reducing construction cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a skid jig in an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;
FIG. 3 is a schematic structural view of a conventional slipping jig frame used in combination with a slipping jig frame according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the sliding jig frame for supporting the steel truss in the embodiment of the invention;
FIG. 5 is a schematic view of the steel truss slipping by the slipping jig frame in the embodiment of the invention;
FIG. 6 is a schematic diagram of a steel truss after a cable is hung in the construction method for the large-span steel truss according to the embodiment of the invention;
FIG. 7 is a schematic diagram of the construction method for the large-span steel truss, in which the ejector is adopted to slide the steel truss;
fig. 8 is a schematic view illustrating that a jack is used to lift a steel truss in the construction method for a long-span steel truss according to the embodiment of the present invention;
fig. 9 is a flowchart of a construction method for a large-span steel truss in the embodiment of the present invention.
Description of the reference numerals:
1. a first frame body; 2. a second frame body; 3. a first beam body;
4. a second beam body; 5. a support member; 6. a steel truss;
7. sliding the jig frame; 8. an inclined lever; 9. a connecting member;
10. a rigging; 11. a sliding track; 12. a pusher;
13. a slipper; 14. a jack.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
FIG. 1 is a schematic view of a skid jig in an embodiment of the present invention; FIG. 2 is an enlarged view of a portion of FIG. 1; as shown in fig. 1 and 2, the embodiment provides a sliding jig frame, which includes a body including a first frame body 1 and a second frame body 2, wherein the first frame body 1 and the second frame body 2 are both vertically disposed, and a preset interval is left between the first frame body 1 and the second frame body 2; the track beam is arranged on the first frame body 1 and the second frame body 2 in a crossing mode, the track beam comprises a first beam body 3 and a second beam body 4 which are arranged in parallel, and the first beam body 3 can move in the direction close to or far away from the second beam body 4; and the support piece 5 is arranged on the track beam and is suitable for supporting the steel truss 6.
Particularly, first support body 1 can be three-dimensional frame, is formed by interconnect's shaped steel connection, and the height of first support body 1 can set up as required. The second frame body 2 has the same structure as the first frame body 1. Wherein, first roof beam body 3 and second roof beam body 4 all can be H type shaped steel, and wherein, first roof beam body 3 and second roof beam body 4 set up respectively at the different sides of first support body 1, and first roof beam body 3 all is located the top of first support body 1 with second roof beam body 4. The second beam 4 can be welded to the first frame 1 and the second frame 2. For example, a telescopic cylinder may be provided between the first beam 3 and the second beam 4 to adjust the distance therebetween. A plurality of support piece 5 can be welded to the one side of first roof beam body 3 back to first support body 1, and each support piece 5 sets up along the extending direction interval of first roof beam body 3, and the interval between two adjacent support piece 5 can set up as required to improve the support effect. Similarly, a support 5 may be provided on the second beam 4. Wherein, the support 5 can be a vertically arranged steel pipe or a steel section.
According to the sliding jig frame provided by the invention, the distance between the first beam body 3 and the second beam body 4 of the track beam along the extending direction of the steel truss 6 can be adjusted, when the steel truss 6 with larger span needs to be supported, the distance between the first beam body 3 and the second beam body 4 can be reduced, and when the steel truss 6 with smaller span needs to be supported, the distance between the first beam body 3 and the second beam body 4 can be increased. So set up, need not to set up the support that the steel truss 6 of different spans can be adapted to the not unidimensional bed-jig 7 that slides of multiunit, be favorable to reducing construction cost.
In this embodiment, an inclined rod 8 is disposed on a side of the first frame body 1 of the sliding jig frame, which faces away from the second beam body 4, one end of the inclined rod 8 is connected to the first frame body 1, and the other end is connected to a surface of the first beam body 3, which faces away from the support 5; one side of the second frame body 2 back to the second beam body 4 is provided with a tilting rod 8, one end of the tilting rod 8 is connected with the second frame body 2, and the other end is connected with one side of the first beam body 3 back to the support member 5. For example, in order to save cost, the inclined rods 8 may be disposed on both the first frame body 1 and the second frame body 2, so that the first beam body 3 may be mounted on the first frame body 1 and the second frame body 2. When the interval between the first beam body 3 and the second beam body 4 needs to be adjusted, the inclined rod 8 and the first beam body 3 can be cut off, the first beam body 3 is cut off from the first frame body 1, the first beam body 3 is changed into a shorter inclined rod 8 to be connected with the first beam body 3, or the first beam body 3 is directly welded on the first frame body 1. Similarly, the same process can be performed for the inclined bar 8 connected to the second frame body 2. Wherein the inclination angle of the inclined rod 8 can be set as required. So arranged, the purpose of adjusting the distance between the first beam body 3 and the second beam body 4 is achieved.
In this embodiment, the preset interval is not less than 20 m. For example, the distance between the first frame 1 and the second frame 2 may be 20m, and in this case, the slide jig 7 may be applied to support with four different truss pitches, i.e., 14m, 15m, 16m, and 18 m. For example, the span of the single steel truss 6 may be 168m, the span of the single steel truss 6 may be 170m, the span of the single steel truss 6 may be 174m, and the span of the single steel truss 6 may be 182 m. The span of the single steel truss 6 may be the same as the width of the building, and the interval between two adjacent steel trusses 6 along the longitudinal direction of the building is the truss pitch.
FIG. 3 is a schematic structural view of a conventional slipping jig frame used in combination with a slipping jig frame according to an embodiment of the present invention; FIG. 4 is a schematic view of a steel truss supported by a sliding jig according to an embodiment of the present invention; as shown in fig. 3 and 4, in an actual construction process, in order to save cost, for example, an improved sliding jig 7 and another conventional sliding jig may be spliced to form a sliding jig set, the number of the sliding jig sets may be two, the other sliding jig set may be spliced by two conventional sliding jigs, and the two sliding jig sets are arranged at intervals along an extending direction of a single steel truss 6.
Fig. 9 is a flowchart of a construction method for a large-span steel truss according to an embodiment of the present invention, and as shown in fig. 9, the present invention further provides a construction method for unequal-distance and unequal-span steel trusses, which at least includes the following steps: installing a sliding jig frame 7; installing a sliding rail 11; when hoisting for the first time, hoisting two independent steel trusses 6 to the sliding jig frame 7 respectively, and connecting the two independent steel trusses 6 into a whole by using the connecting piece 9; slipping the steel trusses 6 connected into a whole, enabling the previous steel truss 6 to be separated from the slipping jig frame 7, hoisting the next steel truss 6 to the slipping jig frame 7 again, connecting the next steel truss 6 and the previous steel truss 6 into a whole by using a connecting piece 9, and repeating the operation until the steel trusses 6 with the same span are constructed; the construction of the steel truss 6 of another span is performed.
Specifically, four sliding jig frames 7, namely an a jig frame, a B jig frame, a C jig frame and a D jig frame, are arranged on the ground at intervals in the extending direction of the single steel truss 6; the a jig, the B jig and the C jig may be conventional sliding jigs 7 (the distance between the first beam 3 and the second beam 4 is not adjustable), and the D jig is the sliding jig 7 in the above embodiment. For steel trusses 6 with different spans, the positions of the a jig, the B jig and the C jig are not changed, and for the steel truss 6 with a smaller span, the distance between the first beam 3 and the second beam 4 needs to be increased to move the support position of the D jig forward to support the steel truss 6. For the steel truss 6 with a large span, the distance between the first beam 3 and the second beam 4 needs to be reduced to move the support position of the D-jig backward to support the steel truss 6. For the selection of the supporting position on the single steel truss 6, the optimal supporting position can be obtained by using the auxiliary analysis of finite element software, and then the sliding jig 7 is arranged at the corresponding position.
The connecting pieces 9 can be steel pipes or section steel, two adjacent steel trusses 6 can be connected into a whole through the connecting pieces 9, and the connecting pieces 9 and the steel trusses 6 can be connected in a welding mode.
In this embodiment, the installation sliding rail 11 specifically includes: two end parts of the steel truss 6 are respectively provided with a sliding track 11; and a sliding track 11 is respectively arranged on the jig frame B and the jig frame C. For example, the skid shoes 13 are arranged on the sliding rails 11 of the B-type jig and the C-type jig, and the tops of the skid shoes 13 can be provided with grooves, so that a truss can be placed in the grooves, and the steel truss 6 is prevented from shaking left and right. The bottom of the shoe 13 can move along the slide rail 11.
FIG. 5 is a schematic diagram of the steel truss sliding by the sliding jig frame in the embodiment of the invention; FIG. 7 is a schematic diagram of the sliding of the steel truss by the ejector in the construction method for the large-span steel truss in the embodiment of the invention; as shown in fig. 5 and 7, in the present embodiment, the slipping of the integrally connected steel girders 6 to separate the previous steel girder 6 from the slipping jig 7 specifically includes: support piece 5 and the separation of steel truss 6 on messenger A bed-jig, B bed-jig, C bed-jig and the D bed-jig, wherein, in order to improve fixed effect, support piece 5 can adopt the mode of spot welding to connect on support piece 5, and during sliding, it can to cut the solder joint open. After that, the first slip is performed. Wherein, an ejector 12 can be arranged on the sliding track 11, and the ejector 12 can move along the sliding track 11 and push the steel truss 6 to move along the sliding track 11.
FIG. 6 is a schematic diagram of a steel truss after a cable is hung in the construction method for the large-span steel truss according to the embodiment of the invention; as shown in fig. 6, the first sliding distance may be set as required, for example, may be 500mm, at this time, the steel truss 6 is entirely suspended, and is through from front to back, and a rope may be hung, the rigging 10 may be composed of vertically arranged booms and a rope, one end of the boom may be installed on the steel truss 6 through a pin, the rope is sequentially connected to each boom along the extending direction of the steel truss 6, and then, a first tensioning operation is performed to tighten the rope. The first tensioning operation is mainly performed by controlling the span, and the cable force of the rope is assisted, so that the problem that the structural rigidity of the steel truss is insufficient after the tire top support of the sliding jig frame is unloaded is solved, the steel truss 6 is prevented from being downwarped, and the steel truss can be enabled to slide for the second time by depending on the remaining two sliding tracks after being separated from the sliding jig frame.
And then, performing second sliding, namely cutting welding points between the sliding shoes 13 on the sliding tracks 11 on the B jig frame and the C jig frame and the steel truss 6, and performing second sliding on the steel truss 6 along the remaining two sliding tracks 11 until the previous steel truss 6 is completely separated from the sliding jig frame 7, at this time, only one truss is left on the sliding jig frame 7, and a new steel truss 6 can be hoisted again, and repeating the above operations until all the steel trusses 6 with the same span are constructed. And then, adjusting the distance between the first beam body 3 and the second beam body 4 on the D jig frame, and performing construction of a truss with another span, wherein the construction process is the same as that of the truss, and is not repeated herein.
In the sliding process of the steel truss 6, force transmission section steel can be arranged between two adjacent trusses, and the force transmission section steel can be arranged close to the bottom of the steel truss 6 and is located at the same height as the ejector 12 as much as possible.
Fig. 8 is a schematic view illustrating that a jack is used to lift a steel truss in the construction method for a large-span steel truss according to the embodiment of the present invention; as shown in fig. 8, in this embodiment, the construction method of the unequal-distance unequal-span steel truss further includes: after each steel truss 6 slides to the target position, the two ends of the steel truss 6 are separated from the sliding rail 11, and the support is installed. After the steel truss 6 integrally slides in place, part of the force transmission section steel is cut off, 1500mm can be reserved on two sides of the steel truss 6 respectively, the steel truss 6 is lifted upwards by 5mm by means of the screw jack 14 and the unloading limiting device, and the support is slid into the bottom of the steel truss 6 and welded and fixed. And then, carrying out support installation on the other side of the steel truss 6.
In this embodiment, the construction method of the unequal-distance unequal-span steel truss further includes: and performing second tensioning operation on the hanging rope. The tension of each hanging rope can be adjusted according to software analysis so as to guarantee the tension effect.
Further, the construction method of the unequal-distance unequal-span steel truss further comprises the following steps: and (4) setting a detection point position, and monitoring the transverse offset and the downwarp of the steel truss 6. For example, there may be five detection points, respectively at the two bottoms of the steel truss 6, at the two ends of the suspension cable, and in the middle of the steel truss 6. If the deviation of the accumulated transverse offset or the downwarp amount in the detection data and the theoretical data exceeds a certain range, the construction should be immediately stopped, the structural integrity and the weld integrity are checked, a special subject is called for, and the reason is analyzed.
In conclusion, the construction method of the unequal-span steel truss can complete the unequal-span unequal-interval prestressed steel truss 6 slippage construction under the condition of obviously reducing the assembling and disassembling times of the slippage jig 7, the construction period and the construction cost are obviously reduced in the construction process, and some measures are innovated, so that the construction efficiency can be well improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.
Claims (8)
1. A construction method for a large-span steel truss is characterized by at least comprising the following steps:
installing a sliding jig frame;
installing a sliding track;
when hoisting for the first time, respectively hoisting two independent steel trusses to the sliding jig frame, and connecting the two independent steel trusses into a whole by using a connecting piece;
sliding the steel trusses connected into a whole to enable the previous steel truss to be separated from the sliding jig frame, hoisting the next steel truss to the sliding jig frame again, connecting the next steel truss and the previous steel truss into a whole by using the connecting piece, and repeating the operation until the construction of the steel trusses with the same span is completed;
constructing a steel truss with another span;
the mounting and sliding jig frame specifically comprises a base;
four sliding jig frames are arranged on the ground at intervals along the extension direction of a single steel truss and are respectively marked as an A jig frame, a B jig frame, a C jig frame and a D jig frame;
wherein, the D bed-jig includes:
the device comprises a body, a first frame body and a second frame body, wherein the first frame body and the second frame body are both vertically arranged, and a preset interval is reserved between the first frame body and the second frame body;
the track beam is arranged on the first frame body and the second frame body in a crossing mode, the track beam comprises a first beam body and a second beam body which are arranged in parallel, and the first beam body can move in the direction close to or far away from the second beam body;
and the supporting piece is arranged on the track beam and is suitable for supporting the steel truss.
2. The construction method for the large-span steel truss according to claim 1, wherein the installation and sliding rail specifically comprises:
two end parts of the steel truss are respectively provided with a sliding track;
and a sliding track is respectively arranged on the jig frame B and the jig frame C.
3. The construction method for a long-span steel truss according to claim 1,
the sliding of the steel trusses integrally connected to enable the previous steel truss to be separated from the sliding jig specifically comprises the following steps:
separating the supporting pieces on the jig frame A, the jig frame B, the jig frame C and the jig frame D from the steel truss, enabling the steel truss to slide for the first time along the four sliding tracks, and after sliding to a preset distance, hanging cables and performing first tensioning operation;
and separating the sliding tracks on the jig frame B and the jig frame C from the steel truss, and performing second sliding on the steel truss along the remaining two sliding tracks until the previous steel truss is separated from the sliding jig frame.
4. The construction method for the large-span steel truss of claim 1, further comprising:
and after each steel truss slides to the target position, separating the two ends of the steel truss from the sliding track, and installing the support.
5. The construction method for the large-span steel truss according to claim 4, further comprising:
and performing second tensioning operation on the hanging rope.
6. The construction method for the large-span steel truss according to claim 1, further comprising:
and (4) setting a detection point position, and monitoring the transverse offset and the downwarp of the steel truss.
7. The construction method for the large-span steel truss of claim 1, further comprising an inclined bar;
one side surface of the first frame body, which is back to the second beam body, is provided with an inclined rod, one end of the inclined rod is connected with the first frame body, and the other end of the inclined rod is connected with one surface of the first beam body, which is back to the support piece;
one side of the second support body back to the second beam body is provided with an inclined rod, one end of the inclined rod is connected with the second support body, and the other end of the inclined rod is connected with one side of the first beam body back to the support piece.
8. The construction method for the large-span steel truss according to claim 1, wherein the preset interval is not less than 20 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110869959.9A CN113431346B (en) | 2021-07-29 | 2021-07-29 | Slippage jig frame for large-span steel truss construction and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110869959.9A CN113431346B (en) | 2021-07-29 | 2021-07-29 | Slippage jig frame for large-span steel truss construction and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113431346A CN113431346A (en) | 2021-09-24 |
| CN113431346B true CN113431346B (en) | 2022-08-19 |
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| CN105544984A (en) * | 2015-12-15 | 2016-05-04 | 安徽伟宏钢结构集团股份有限公司 | Large-span steel structure jig frame integrity slip construction process |
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| CN107338963B (en) * | 2017-07-17 | 2019-05-31 | 中建三局第一建设工程有限责任公司 | A kind of over-the-counter construction method for hanging of super-span truss string structure |
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Denomination of invention: A sliding tire frame and construction method for large-span steel truss construction Effective date of registration: 20231212 Granted publication date: 20220819 Pledgee: Shenzhen Branch of Bank of Hangzhou Co.,Ltd. Pledgor: China Construction Science And Industry Co.,Ltd. Registration number: Y2023980071313 |