CN111779286A - Construction method for assembling planar truss on site - Google Patents
Construction method for assembling planar truss on site Download PDFInfo
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- CN111779286A CN111779286A CN202010725002.2A CN202010725002A CN111779286A CN 111779286 A CN111779286 A CN 111779286A CN 202010725002 A CN202010725002 A CN 202010725002A CN 111779286 A CN111779286 A CN 111779286A
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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
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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
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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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Abstract
The invention discloses a construction method for assembling a plane truss on site, which specifically comprises the following steps: performing integral hardening treatment on the cross-inner assembly site; preparing one or more vertical assembling jig frames according to the length of a planar truss to be assembled, drawing a ground sample line of a placing position of the vertical assembling jig frames on an assembling field through measurement, arranging embedded parts on the placing position, and fixing all the vertical assembling jig frames with the corresponding embedded parts in sequence by adopting bolts; hoisting the segmented plane truss on a vertical assembling jig frame by using a crane; welding the adjacent two-section plane truss by adopting gas shielded arc welding, and carrying out flaw detection on the quality of a welding seam according to design requirements after welding; and after the detection is qualified, assembling the plane truss, and hoisting the assembled plane truss to a corresponding high-altitude installation position by using a crane for installation. The construction method greatly reduces the occupation of a construction site, reduces the use of a measure jig frame and a crane, and improves the installation efficiency.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a construction method for assembling a plane truss on site.
Background
The truss is widely applied to steel structures, and is mainly applied to projects such as roofs (roof trusses and the like), crane beams (namely crane trusses), stations, bridges and the like of industrial and civil buildings. Steel trusses are commonly used as the main members of load-bearing structures, and the steel trusses are most commonly planar trusses which are essentially lattice-type beams under transverse loads. Compared with a solid-web steel beam, the steel truss is characterized in that a flange is replaced by a chord member and a web member is replaced by a web member, and the web member and the chord member are connected with each other at each node through a gusset plate (or other parts) by welding seams or other connections; the rod pieces can also be directly welded and connected with each other. Thus, the bending moment when the whole plane truss is bent is expressed as the axial compression and tension of the upper chord and the lower chord, and the shearing force is expressed as the axial compression or tension of each web member. Therefore, the plane truss structure has the advantages of less material consumption, light weight, good toughness and plasticity, strong bearing capacity, convenience for factory manufacture, construction site assembly and the like.
The plane truss, especially the large span plane truss, is generally constructed by adopting the methods of subsection transportation, field ground assembly and then hoisting. The ground assembly of the truss is one of key links of engineering quality control, and mainly comprises assembly site processing, assembly jig frame setting and truss assembly construction. The traditional ground assembly adopts a horizontal assembly jig frame for assembly, and when the horizontal assembly is carried out, in order to avoid the influence on welding quality caused by overhead welding and vertical welding, a crane is required to turn over the truss after one surface is welded so as to weld the other surface of the truss; meanwhile, the horizontal assembling jig frame occupies a large space, a field needs to be added outside the span for assembling, then a crane is adopted to transfer the assembled truss to the span, then the truss is hoisted and transferred to the span, a field needs to be additionally added and the jig frame needs to be placed to stack the truss, and when the situation that the field is limited or the crane is tense exists in a construction field, the horizontal assembling jig frame cannot be adopted for ground assembling.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the construction method for splicing the plane truss on site, which is favorable for greatly reducing the occupation of a construction site, reducing the use of a measure jig frame and a crane and improving the installation efficiency.
A construction method for assembling a plane truss on site specifically comprises the following steps:
(1) the whole hardening treatment is carried out on the cross-inner assembly field, so that the assembly precision is prevented from being influenced by the settlement of the assembly field;
(2) preparing one or more vertical assembling jig frames according to the length of the planar truss to be assembled, wherein each vertical assembling jig frame comprises two cushion beams which are horizontally arranged at intervals and are parallel to each other, a connecting beam is arranged between the two cushion beams, the connecting beam is horizontally arranged and is vertical to the two cushion beams, and two ends of the connecting beam are respectively connected with the middle parts of the two cushion beams; the two cushion beams are respectively and vertically provided with a central upright post, the position of the central upright post on the cushion beam corresponds to the connecting beam, and the cushion beams on the two sides of the central upright post are respectively and vertically provided with a supporting upright post, so that a crack is formed between each supporting upright post and the corresponding central upright post, and the width of the crack is equal to that of the plane truss; a first diagonal brace is arranged between the outer side of each supporting upright post and the corresponding pad beam, one end of each first diagonal brace is connected with the supporting upright post, and the other end of each first diagonal brace is connected with the corresponding pad beam; drawing a ground sample line of a placing position of the vertical assembling jig frame on an assembling field by measuring, arranging embedded parts on the placing position, fixing all the vertical assembling jig frames with the corresponding embedded parts in sequence by adopting bolts, and arranging all the vertical assembling jig frames at intervals and on the same straight line;
(3) the method comprises the following steps that a crane is adopted to hoist a segmented plane truss on a vertical assembling jig frame, the segmented plane truss is located in a crack between a central upright post and a supporting upright post on the same side, a theodolite or a spirit level is used for measuring vertical elevation on the to-be-assembled plane truss, and after the measurement and positioning are finished, all the segmented plane trusses are fixed by a fixed positioning block;
(4) welding the adjacent two-section plane truss by adopting gas shielded arc welding, and carrying out flaw detection on the quality of a welding seam according to design requirements after welding;
(5) and after the detection is qualified, assembling the plane truss, and hoisting the assembled plane truss to a corresponding high-altitude installation position by using a crane for installation.
Furthermore, the lower ends of the supporting upright post and the first diagonal brace are respectively provided with a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are respectively provided with a plurality of first bolt holes and a plurality of second bolt holes, the pad beam is provided with a plurality of groups of third bolt holes and fourth bolt holes corresponding to the first bolt holes and the second bolt holes, all the third bolt holes and the fourth bolt holes are uniformly distributed along the length direction of the pad beam and have certain length, the first bolts sequentially penetrate through the first bolt holes and the corresponding third bolt holes to fix the first connecting plate and the pad beam, the second bolts sequentially penetrate through the second bolt holes and the corresponding fourth bolt holes to fix the second connecting plate and the pad beam, so that the supporting upright post and the first diagonal brace are fixed on the pad beam, and the distance between the supporting upright post and the central upright post can be adjusted by adjusting the fixing positions of the first connecting plate and the second connecting plate on the pad beam, thereby being used for splicing plane trusses with different widths.
Furthermore, the outer sides of the two cushion beams are respectively provided with a balance beam, the balance beams are horizontally arranged and fixedly connected with the corresponding cushion beams, and the fixed positions of the balance beams and the cushion beams correspond to the central upright column, so that the two balance beams and the connecting beam are positioned on the same straight line; and a second diagonal brace is arranged between the central upright post and the balance beam, one end of the second diagonal brace is fixedly connected with the central upright post, and the other end of the second diagonal brace is fixedly connected with the balance beam.
Furthermore, the two ends of the connecting beam are fixed on the pad beam through a third connecting plate, the third connecting plate is fixedly arranged on the pad beam, a plurality of fifth bolt holes are formed in the third connecting plate, sixth bolt holes corresponding to the fifth bolt holes are formed in the connecting beam, and third bolts sequentially penetrate through the fifth bolt holes and the sixth bolt holes to fixedly connect the third connecting plate with the connecting beam, so that the connecting beam is fixedly connected with the pad beam.
Furthermore, a third diagonal brace is arranged between the connecting beam and the central upright post, one end of the third diagonal brace is fixedly connected with the connecting beam, and the other end of the third diagonal brace is fixedly connected with the central upright post.
Further, the upper end of the third diagonal brace is fixed on the central stand column through a fourth connecting plate, the fourth connecting plate is fixedly arranged on the central stand column, a plurality of seventh bolt holes are formed in the fourth connecting plate, eighth bolt holes corresponding to the seventh bolt holes are formed in the third diagonal brace, and fourth bolts sequentially penetrate through the seventh bolt holes and the eighth bolt holes to fixedly connect the third diagonal brace and the fourth connecting plate, so that the third diagonal brace and the central stand column are fixedly connected.
Compared with the prior art, the invention has the following beneficial effects:
1. the vertical assembling jig frame is adopted to assemble the plane truss, the floor space of the plane truss is small, the plane truss can be assembled on the ground in a span, and the installation efficiency is improved; compared with the traditional on-site horizontal assembly jig frame, the step of turning over the trusses in the assembly process is reduced, an on-site crane and an assembly site are saved, two plane trusses can be placed at one time for assembly, and the assembly efficiency of the on-site trusses is improved. And this bed-jig is assembled to vertical stable in structure, and the material is few, and is with low costs, can repeatedly have enough to meet the need the use.
2. The invention can be used for assembling plane trusses with different widths by adjusting the distance between the supporting upright post and the central upright post, thereby improving the application range of the vertical assembling jig frame and further improving the utilization rate of the vertical assembling jig frame.
3. The vertical assembling jig frame is adopted for construction, not only serves as an assembling tool, but also plays a role of stacking the plane truss before hoisting, so that the occupation of a field site can be greatly reduced, the use of field measures and the use of a jig frame and a crane are reduced, and the field installation efficiency of the plane truss is improved.
Drawings
Fig. 1-structural schematic diagram of the vertical assembling jig frame of the invention.
Fig. 2-the structure schematic diagram of the present invention assembled on site.
Fig. 3-side view of fig. 2.
Fig. 4-cross-sectional view B-B of fig. 3.
Fig. 5-fig. 3, cross-sectional view C-C.
Wherein: wherein: 1-a bolster; 2-a balance beam; 3-connecting the beams; 4-a third diagonal brace; 5-a second diagonal strut; 6-a central upright post; 7-supporting the upright post; 8-a first diagonal strut; 9-a first connection plate; 10-a second connecting plate; 11-a third connecting plate; 12-planar truss a; 13-planar truss B.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 5, a construction method for assembling a planar truss on site specifically includes the following steps:
(1) the whole hardening treatment is carried out on the cross-inner assembly field, so that the assembly precision is prevented from being influenced by the settlement of the assembly field;
(2) preparing one or more vertical assembling jig frames according to the length of a planar truss to be assembled, and referring to fig. 1, the vertical assembling jig frame comprises two cushion beams 1, the two cushion beams 1 are horizontally arranged at intervals, the two cushion beams 1 are parallel to each other, a connecting beam 3 is arranged between the two cushion beams 1, the connecting beam 3 is horizontally arranged and is vertical to the two cushion beams 1, and two ends of the connecting beam 3 are respectively connected with the middle parts of the two cushion beams 1; the two cushion beams 1 are respectively and vertically provided with a central upright post 6, the position of the central upright post 6 on the cushion beam 1 corresponds to the connecting beam 3, and the cushion beams 1 on the two sides of the central upright post 6 are respectively and vertically provided with a supporting upright post 7, so that a crack is formed between each supporting upright post 7 and the corresponding central upright post 6, and the width of the crack is equal to the width of the plane truss; a first diagonal brace 8 is arranged between the outer side of each supporting upright 7 and the corresponding pad beam 1, one end of each first diagonal brace 8 is connected with the supporting upright 7, and the other end of each first diagonal brace is connected with the corresponding pad beam 1; drawing a ground sample line of a placing position of the vertical assembling jig frame on an assembling field by measuring, arranging embedded parts on the placing position, fixing all the vertical assembling jig frames with the corresponding embedded parts in sequence by adopting bolts, and arranging all the vertical assembling jig frames at intervals and on the same straight line;
(3) hoisting the segmented plane trusses on a vertical assembling jig frame by using a crane, positioning the segmented plane trusses in a crack between a central upright post 6 and a supporting upright post 7 on the same side, measuring the vertical elevation on the to-be-assembled plane trusses by using a theodolite or a spirit level, and fixing all the segmented plane trusses by using a fixed positioning block after the measurement and positioning are finished;
for a large-span plane truss with pre-arching, two points of a pre-arching point and the plane truss on the left side and the right side below the pre-arching point are used as control points, and a theodolite or a spirit level is required to be used for measuring the vertical elevation of the control points; for the plane truss without pre-arching, the elevation of the plane truss needs to be measured by using a theodolite or a gradienter, and the segmented plane truss is fixed by using a fixed positioning block if necessary so as to improve the assembling accuracy.
(4) Welding the adjacent two-section plane truss by adopting gas shielded arc welding, and carrying out flaw detection on the quality of a welding seam according to design requirements after welding;
referring to fig. 2, two vertical assembling jig frames are adopted to assemble two plane trusses simultaneously, a plane truss A12 and a plane truss B13 are respectively placed in a crack between a supporting upright post and a central upright post to support the plane truss A and the plane truss B, so that the two plane trusses can be conveniently assembled simultaneously, and the assembling efficiency is improved.
Referring to fig. 4, point a is a sectional splicing position (welding position) of the planar girder a12, and point B in fig. 5 is a sectional splicing position (welding position) of the planar girder B13. However, when two plane trusses are placed, attention should be paid to the fact that the splicing positions of the two plane trusses in the horizontal direction are staggered by at least 500mm, and mutual influence of the two plane trusses when welding operation is carried out at the segmentation positions is avoided. The plane truss is provided with a groove at the position of the section opening and a backing plate, so that welding operation is convenient when the plane truss is assembled on the adjustable vertical assembling jig on site. Meanwhile, the sectional splicing positions of the upper chord member and the lower chord member of the same plane truss are staggered by more than 200mm in the horizontal direction, so that the accumulation of welding seam stress during welding operation is avoided.
(5) And after the detection is qualified, assembling the plane truss, and hoisting the assembled plane truss to a corresponding high-altitude installation position by using a crane for installation.
In specific implementation, the lower ends of the supporting upright post 7 and the first diagonal brace 8 are respectively provided with a first connecting plate 9 and a second connecting plate 10, the first connecting plate 9 and the second connecting plate 10 are respectively provided with a plurality of first bolt holes and a plurality of second bolt holes, the pad beam 1 is provided with a plurality of groups of third bolt holes and fourth bolt holes corresponding to the first bolt holes and the second bolt holes, all the third bolt holes and the fourth bolt holes are uniformly distributed along the length direction of the pad beam and have a certain length, the first bolts sequentially pass through the first bolt holes and the corresponding third bolt holes to fix the first connecting plate 9 and the pad beam 1, the second bolts sequentially pass through the second bolt holes and the corresponding fourth bolt holes to fix the second connecting plate 10 and the pad beam 1, so that the supporting upright post 7 and the first diagonal brace 8 are fixed on the pad beam 1, and the distance between the supporting upright post 7 and the central upright post 6 can be adjusted by adjusting the fixing positions of the first connecting plate 9 and the second connecting plate 10 on the pad beam 1, thereby being used for splicing plane trusses with different widths.
Therefore, the fixed positions of the first connecting plate and the second connecting plate can be moved, and the width between the cracks is adjusted, so that the vertical assembling jig frame is applied to assembling of plane trusses with different widths, the application range of the vertical assembling jig frame is widened, the vertical assembling jig frame can be repeatedly used in a turnover mode, and the utilization rate of the vertical assembling jig frame is greatly increased.
In specific implementation, the outer sides of the two cushion beams 1 are respectively provided with a balance beam 2, the balance beams 2 are horizontally arranged and fixedly connected with the corresponding cushion beams 1, and the fixed positions of the balance beams 2 and the cushion beams 1 correspond to the central upright 6, so that the two balance beams 2 and the connecting beam 3 are positioned on the same straight line; and a second diagonal brace 5 is arranged between the central upright post 6 and the balance beam 2, one end of the second diagonal brace 5 is fixedly connected with the central upright post 6, and the other end is fixedly connected with the balance beam 2.
Thus, the whole structure of the jig frame is more stable. And the length of the connecting beam is far longer than that of the balance beam.
During concrete implementation, 3 both ends of tie-beam are fixed on filling up roof beam 1 through third connecting plate 11, third connecting plate 11 is fixed to be set up on filling up roof beam 1 to be equipped with a plurality of fifth bolt holes on third connecting plate 11, be equipped with the sixth bolt hole that corresponds with the fifth bolt hole on tie-beam 3, the third bolt passes fifth bolt hole and sixth bolt hole in proper order in order to with third connecting plate 11 and 3 fixed connection of tie-beam, thereby with tie-beam 3 and 1 fixed connection of pad roof beam.
Like this, conveniently dismantle into tie-beam and the bearing structure who is located the tie-beam both ends when transporting or placing holistic vertical concatenation framework, practice thrift the place when doing benefit to the loading when transporting and placing.
During specific implementation, a third diagonal brace 4 is arranged between the connecting beam 3 and the central upright post 6, one end of the third diagonal brace 4 is fixedly connected with the connecting beam 3, and the other end of the third diagonal brace is fixedly connected with the central upright post 6.
During concrete implementation, the upper end of the third diagonal brace 4 is fixed on the central upright 6 through a fourth connecting plate, the fourth connecting plate is fixedly arranged on the central upright 6, a plurality of seventh bolt holes are formed in the fourth connecting plate, eighth bolt holes corresponding to the seventh bolt holes are formed in the third diagonal brace 4, and fourth bolts sequentially penetrate through the seventh bolt holes and the eighth bolt holes to fixedly connect the third diagonal brace 4 with the fourth connecting plate, so that the third diagonal brace 4 is fixedly connected with the central upright 6.
In specific implementation, all parts of the vertical assembling jig frame are made of I-shaped steel.
When the vertical assembling jig frame is used, the sectional trusses on the transport vehicle can be directly hoisted to the vertical assembling jig frame for assembling, and then the assembled plane truss is hoisted to the high altitude for assembly line work of in-place installation.
Finally, it should be noted that the above-mentioned examples of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.
Claims (6)
1. A construction method for assembling a plane truss on site is characterized by comprising the following steps:
(1) the whole hardening treatment is carried out on the cross-inner assembly field, so that the assembly precision is prevented from being influenced by the settlement of the assembly field;
(2) preparing one or more vertical assembling jig frames according to the length of the planar truss to be assembled, wherein each vertical assembling jig frame comprises two cushion beams which are horizontally arranged at intervals and are parallel to each other, a connecting beam is arranged between the two cushion beams, the connecting beam is horizontally arranged and is vertical to the two cushion beams, and two ends of the connecting beam are respectively connected with the middle parts of the two cushion beams; the two cushion beams are respectively and vertically provided with a central upright post, the position of the central upright post on the cushion beam corresponds to the connecting beam, and the cushion beams on the two sides of the central upright post are respectively and vertically provided with a supporting upright post, so that a crack is formed between each supporting upright post and the corresponding central upright post, and the width of the crack is equal to that of the plane truss; a first diagonal brace is arranged between the outer side of each supporting upright post and the corresponding pad beam, one end of each first diagonal brace is connected with the supporting upright post, and the other end of each first diagonal brace is connected with the corresponding pad beam; drawing a ground sample line of a placing position of the vertical assembling jig frame on an assembling field by measuring, arranging embedded parts on the placing position, fixing all the vertical assembling jig frames with the corresponding embedded parts in sequence by adopting bolts, and arranging all the vertical assembling jig frames at intervals and on the same straight line;
(3) the method comprises the following steps that a crane is adopted to hoist a segmented plane truss on a vertical assembling jig frame, the segmented plane truss is located in a crack between a central upright post and a supporting upright post on the same side, a theodolite or a spirit level is used for measuring vertical elevation on the to-be-assembled plane truss, and after the measurement and positioning are finished, all the segmented plane trusses are fixed by a fixed positioning block;
(4) welding the adjacent two-section plane truss by adopting gas shielded arc welding, and carrying out flaw detection on the quality of a welding seam according to design requirements after welding;
(5) and after the detection is qualified, assembling the plane truss, and hoisting the assembled plane truss to a corresponding high-altitude installation position by using a crane for installation.
2. The construction method for assembling the planar truss on the spot as claimed in claim 1, wherein the lower ends of the supporting upright and the first diagonal brace are respectively provided with a first connecting plate and a second connecting plate, the first connecting plate and the second connecting plate are respectively provided with a plurality of first bolt holes and second bolt holes, the pad beam is provided with a plurality of groups of third bolt holes and fourth bolt holes corresponding to the first bolt holes and the second bolt holes, all the third bolt holes and the fourth bolt holes are uniformly distributed along the length direction of the pad beam and have a certain length, the first bolts sequentially pass through the first bolt holes and the corresponding third bolt holes to fix the first connecting plate and the pad beam, the second bolts sequentially pass through the second bolt holes and the corresponding fourth bolt holes to fix the second connecting plate and the pad beam, so as to fix the supporting upright and the first diagonal brace on the pad beam, and adjust the fixing positions of the first connecting plate and the second connecting plate on the pad beam to adjust the supporting upright and the central upright and the fixing positions of the supporting upright and the central upright And thus, are used for assembling plane trusses of different widths.
3. The construction method for assembling the planar truss on the spot according to claim 2, wherein the two pad beams are respectively provided with a balance beam at the outer side, the balance beams are horizontally arranged and fixedly connected with the corresponding pad beams, and the fixed positions of the balance beams and the pad beams correspond to the central upright column, so that the two balance beams and the connecting beam are positioned on the same straight line; and a second diagonal brace is arranged between the central upright post and the balance beam, one end of the second diagonal brace is fixedly connected with the central upright post, and the other end of the second diagonal brace is fixedly connected with the balance beam.
4. The construction method for assembling the planar truss on the spot according to claim 3, wherein two ends of the connecting beam are fixed on the pad beam through a third connecting plate, the third connecting plate is fixedly arranged on the pad beam, a plurality of fifth bolt holes are arranged on the third connecting plate, a sixth bolt hole corresponding to the fifth bolt hole is arranged on the connecting beam, and a third bolt sequentially passes through the fifth bolt hole and the sixth bolt hole to fixedly connect the third connecting plate and the connecting beam, so as to fixedly connect the connecting beam and the pad beam.
5. The construction method for assembling the plane truss on the spot according to claim 4, wherein a third diagonal brace is arranged between the connecting beam and the central upright, one end of the third diagonal brace is fixedly connected with the connecting beam, and the other end of the third diagonal brace is fixedly connected with the central upright.
6. The construction method for assembling the planar truss on the spot according to claim 5, wherein the upper end of the third diagonal brace is fixed on the central column through a fourth connecting plate, the fourth connecting plate is fixedly arranged on the central column, a plurality of seventh bolt holes are arranged on the fourth connecting plate, an eighth bolt hole corresponding to the seventh bolt hole is arranged on the third diagonal brace, and a fourth bolt sequentially passes through the seventh bolt hole and the eighth bolt hole to fixedly connect the third diagonal brace and the fourth connecting plate, so as to fixedly connect the third diagonal brace and the central column.
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| CN113006497A (en) * | 2021-02-24 | 2021-06-22 | 中铁四局集团建筑工程有限公司 | Construction method for large-span steel truss multi-curved-surface dome structure |
| CN113006497B (en) * | 2021-02-24 | 2022-09-23 | 中铁四局集团建筑工程有限公司 | Construction method for large-span steel truss multi-curved-surface dome structure |
| CN114232915A (en) * | 2021-12-31 | 2022-03-25 | 中铁五局集团有限公司 | Method for assembling canopy hanging sheet units of roof of station at traffic hub site |
| CN115196523A (en) * | 2022-06-06 | 2022-10-18 | 上海建工七建集团有限公司 | Euro cabin intelligent equipment installation device and method |
| CN115196523B (en) * | 2022-06-06 | 2023-11-10 | 上海建工七建集团有限公司 | Euro bin intelligent equipment installation device and method |
| CN115162813A (en) * | 2022-07-14 | 2022-10-11 | 中国三冶集团有限公司 | Ground assembling method for cylindrical thin oil tank piston module |
| CN115162813B (en) * | 2022-07-14 | 2024-05-03 | 中国三冶集团有限公司 | Ground assembling method for cylindrical thin oil tank piston module |
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Application publication date: 20201016 |