CN113481819A - Self-anchored suspension bridge steel-concrete combined section and construction method thereof - Google Patents
Self-anchored suspension bridge steel-concrete combined section and construction method thereof Download PDFInfo
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- CN113481819A CN113481819A CN202110808382.0A CN202110808382A CN113481819A CN 113481819 A CN113481819 A CN 113481819A CN 202110808382 A CN202110808382 A CN 202110808382A CN 113481819 A CN113481819 A CN 113481819A
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- 239000004567 concrete Substances 0.000 title claims abstract description 127
- 239000000725 suspension Substances 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 98
- 239000010959 steel Substances 0.000 claims abstract description 98
- 210000002435 tendon Anatomy 0.000 claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 239000011513 prestressed concrete Substances 0.000 claims abstract description 9
- 239000002131 composite material Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000001965 increasing effect Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000013585 weight reducing agent Substances 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract 1
- 210000003205 muscle Anatomy 0.000 description 18
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
Abstract
The self-anchored suspension bridge steel-concrete combined section comprises a concrete beam section and a steel beam section, wherein the concrete beam section and the steel beam section are connected through a steel-concrete connecting mechanism and a tensioning mechanism, and the connecting mechanism comprises an interface bearing plate and a stud shear key welded on a steel structure overhanging steel plate; the tensioning mechanism comprises a prestressed concrete area arranged in a concrete beam section, and a plurality of tensioning prestressed tendons are arranged between the prestressed concrete area and the steel beam section for tensioning connection; the self-anchored suspension bridge steel-concrete combined section is mainly used for converting a concrete structure to a steel structure, the concrete section is positioned at a side-span position to achieve the purpose of weight reduction, the steel beam section is used at a mid-span position to achieve the purposes of reducing self-weight and increasing the span diameter of a bridge, and the steel-concrete combined section is mainly arranged at the transition position of the concrete structure and the steel structure and at two sides near a main tower or near a mid-span support bending moment reverse bending point, so that the superior compression resistance of concrete is utilized, the tensile property of steel is utilized, the respective material properties of the concrete beam and the steel beam are fully exerted, and the cost and the construction period are reduced.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a self-anchored suspension bridge steel-concrete combined section and a construction method thereof, which are mainly applied to highway, railway, track and municipal bridge structures.
Background
The suspension bridge is a bridge using a cable rope or a chain rope bearing tension as a main bearing component and comprises a suspension cable, a cable tower, an anchorage, a suspender, a bridge deck system and the like. The self-anchored suspension bridge and the ground anchored suspension bridge can be divided according to different anchorage fixing positions. Compared with the ground anchor type suspension bridge, the self-anchored suspension bridge cancels a huge anchor, reduces the requirement on the foundation, can be suitable for areas with poor geological conditions, and successively builds a plurality of self-anchored suspension bridges at home and abroad in recent years.
The concrete structure bridge has low cost, but has heavy self weight, small bridge span and long construction period; the steel structure bridge has the characteristics of light dead weight, high strength, large steel consumption and high manufacturing cost, so that the main structure of the self-anchored suspension bridge generally adopts a steel box girder structure, an anchor span continuous beam adopts a concrete box girder structure, and a steel-concrete combined section is required to be arranged in the middle of the anchor span continuous beam so as to effectively connect the steel structure and the concrete structure, for example, Chinese patent document with the publication number of CN110835884A discloses a latticed room steel-concrete combined section structure for the large-span self-anchored suspension bridge, wherein the variable-height stiffening section is provided with a bottom plate, and the steel-concrete combined section structure sequentially comprises a concrete beam section, a steel latticed room section, a steel beam stiffening section and the like. Chinese patent literature, granted publication No. CN208105015U, discloses an interface anchoring structure for a steel-concrete composite beam, wherein a high-strength bolt is welded on an upper flange of a steel beam, a stepped round hole is reserved at a position of a concrete bridge deck corresponding to the high-strength bolt, a top opening of the stepped round hole is exposed out of the surface of the concrete bridge deck, a bottom opening of the stepped round hole is in contact with an upper flange of the steel beam, the diameter of the stepped round hole is larger than that of the high-strength bolt, the high-strength bolt is inserted into the stepped round hole, and mortar is poured into the stepped round hole to anchor and connect the steel beam and the concrete bridge deck.
The steel-concrete combined section can fully exert the stress performance of different materials, reduce the weight of the upper structure of the bridge, improve the stress of the structure, further increase the spanning capacity of the bridge and improve the economy of the bridge; therefore, the structure of the steel-concrete combined segment used for the self-anchored suspension bridge should be continuously and intensively studied and further improved to improve the performance of the entire suspension bridge.
Disclosure of Invention
The invention aims to provide a self-anchored suspension bridge steel-concrete combined section and a construction method thereof; the technical scheme adopted for achieving the purpose is as follows:
a self-anchored suspension bridge steel-concrete combined section comprises a concrete beam section and a steel beam section, wherein the concrete beam section and the steel beam section are connected through a steel-concrete connecting mechanism and a tensioning mechanism, and the connecting mechanism comprises an interface bearing plate and a stud shear key welded on a steel structure overhanging steel plate; the tensioning mechanism comprises a prestressed concrete area arranged in a concrete beam section, and a plurality of tensioning prestressed tendons are arranged between the prestressed concrete area and the steel beam section for tensioning connection.
Preferably, many stretch-draw prestressing tendons divide into group muscle, well group muscle and lower group muscle, and wherein go up group muscle, well group muscle and lower group muscle and all include a plurality of stretch-draw prestressing tendons, it is located the top position of concrete beam section and girder segment to go up the group muscle, well group muscle is located the middle part position of concrete beam section and girder segment, and lower group muscle is located the bottom position of concrete beam section and girder segment.
Preferably, the maximum bearing capacity of the tensioned prestressed tendons of the middle group of tendons is greater than the maximum bearing capacity of the tensioned prestressed tendons of the upper group of tendons and the lower group of tendons.
Preferably, the steel-hybrid connecting mechanism comprises a top connecting plate, a middle connecting plate and a bottom connecting plate which are integrally formed at the connecting end of the steel beam section, wherein the top connecting plate and the bottom connecting plate extend out of the connecting end of the steel beam section and are correspondingly lapped on the top surface and the bottom surface of the concrete beam section, and the middle connecting plate is vertically arranged and clings to the connecting end of the concrete beam section; the top combination plate, the middle combination plate and the bottom combination plate are all connected with the concrete beam section through the pegs uniformly distributed in the array.
Preferably, the concrete beam section is a T-shaped beam, a pi-shaped beam or a box-shaped beam.
Preferably, the steel beam section is an I-shaped steel beam or a box beam.
Preferably, a transverse connecting mechanism is further arranged between the concrete beam section and the steel beam section so as to form an integral bridge structure.
Preferably, the steel bridge deck of the steel beam section is stiffened by U-ribs to form orthotropic steel bridge deck boards.
The construction method of the self-anchored suspension bridge steel-concrete combined section comprises the following steps:
step A: transporting the steel beam section prefabricated in a steel mill to a bridge site, and then manufacturing a concrete beam section on site; after the concrete beam section reaches 100% of the design strength, carrying out position butt joint installation on the concrete beam section and the steel beam section, and finally connecting the concrete beam section and the steel beam section through a steel-concrete connecting mechanism and a tensioning mechanism to form a steel-concrete combined beam;
and B: performing transverse connection construction on the steel-concrete composite beam to form an integral bridge structure;
and C: and finally, paving the bridge deck and constructing the auxiliary facilities.
Preferably, the concrete beam section is manufactured by a hanging basket construction process sectional construction method.
The invention has the following beneficial effects: on the premise of enhancing the strength and rigidity of the bridge structure and ensuring the improvement of safe storage, the superior material performance of the concrete and the steel is fully utilized, so that the span of the bridge is increased, and the self weight and the construction period of the bridge are reduced; the advantages of the concrete and the steel are exerted in the construction and operation stages, so that the purpose of saving the engineering quantity of the steel and the concrete is achieved, the engineering cost is saved, and the construction and development of the highway bridge are promoted.
The steel-concrete composite beam is prefabricated and produced into a corresponding steel beam section in a steel structure processing factory, a steel bridge deck of the steel beam section is stiffened by adopting U ribs to form an orthotropic steel bridge deck, the buckling resistance and the fatigue resistance are excellent, the processed steel beam structure is transported to a bridge position, the steel beam structure is used as a template at the joint of the steel-concrete composite beam, a hanging basket construction process is adopted to construct and manufacture a concrete beam section in a segmented mode, after the concrete beam section reaches 100% of the design strength, the prestress is tensioned, and after the prestress reaches a stable value, transverse connection, bridge deck pavement and accessory facility construction are carried out to form an integral bridge.
The self-anchored suspension bridge steel-concrete combined section is mainly used for converting a concrete structure to a steel structure, the concrete section is positioned at a side span position to achieve the purpose of weight reduction, the steel beam section is used at a mid-span position to achieve the purposes of reducing self-weight and increasing the span diameter of a bridge, and the steel-concrete combined section is mainly arranged at two sides near a main tower or near a mid-span support bending moment reverse bending point, so that the superior compression resistance of concrete is utilized, the tensile property of steel is utilized, the material performance of the concrete beam and the steel beam is fully exerted, the cost and the construction period are reduced, the steel consumption of the bridge related to the conventional steel structure such as the normal steel beam and the steel-mixed beam is reduced, and the concrete consumption is reduced compared with that of the conventional concrete beam.
Compared with the common conventional structure, the structure of the invention estimates that the construction cost is about 65 percent of the steel beam structure and about 80 percent of the conventional steel-mixed composite beam, and the comprehensive construction cost is equivalent to the prestressed concrete bridge structure, so the invention can achieve the aim of saving the construction cost, has high safety margin, accords with the idea of innovation, green and resource saving, and has wide application market prospect.
Drawings
FIG. 1 is a schematic structural view of a steel-concrete combined segment of a self-anchored suspension bridge according to the present invention;
FIG. 2 is a right side view of the inner middle bonding plate of FIG. 1;
FIG. 3 is a left side view of the inner middle bonding plate of FIG. 1;
fig. 4 is a top view of a steel beam segment.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 4, a self-anchored suspension bridge steel-concrete combined section comprises a concrete beam section 2 and a steel beam section 6, wherein the concrete beam section 2 and the steel beam section 6 are connected through a steel-concrete connection mechanism and a tensioning mechanism, the tensioning mechanism comprises a prestressed concrete area 1 arranged in the concrete beam section 2, and a plurality of tensioning prestressed tendons are arranged between the prestressed concrete area 1 and the steel beam section 6 for tensioning connection.
Wherein, many stretch-draw prestressing tendons divide into group muscle 10, well group muscle 9 and lower group muscle 8, and wherein go up group muscle 10, well group muscle 9 and lower group muscle 8 and all include a plurality of stretch-draw prestressing tendons, it is located the top position of concrete beam section 2 and girder steel section 6 to go up group muscle 10, well group muscle 9 is located the middle part position of concrete beam section 2 and girder steel section 6, and lower group muscle 8 is located the bottom position of concrete beam section 2 and girder steel section 6.
In order to enable the middle part to have larger tension bearing capacity, the maximum bearing capacity of the tensioned prestressed tendons of the middle group of the tendons 9 is larger than the maximum bearing capacity of the tensioned prestressed tendons of the upper group of the tendons 10 and the lower group of the tendons 8; meanwhile, the maximum bearing capacity of the tensioned prestressed tendons of the upper group of tendons 10 and the lower group of tendons 8 can also be adjusted according to actual stress distribution, for example, the bearing capacities of the tensioned prestressed tendons at two sides can be set to be larger, and the bearing capacity of the tensioned prestressed tendons in the middle can be set to be smaller.
The steel-concrete connecting mechanism comprises a top connecting plate 4, a middle connecting plate 5 and a bottom connecting plate 7 which are integrally formed at the connecting end of a steel beam section 6, wherein the top connecting plate 4 and the bottom connecting plate 7 extend out of the connecting end of the steel beam section 6 and are correspondingly lapped on the top surface and the bottom surface of the concrete beam section 2, and the middle connecting plate 5 is vertically arranged and clings to the connecting end of the concrete beam section 2; the top combination plate 4, the middle combination plate 5 and the bottom combination plate 7 are all connected with the concrete beam section 2 through the pegs 3 uniformly distributed in an array mode.
The structure is not limited to the concrete structure types of the concrete beam section 2 and the steel beam section 6, and different types of matching and combination can be performed between the concrete beam section 2 and the steel beam section according to actual conditions, wherein the concrete beam section 2 can be a T-shaped beam, a pi-shaped beam or a box-shaped beam; the steel beam section 6 is an I-shaped steel beam or a box beam.
In order to further increase the connection strength and integrity, a transverse connection mechanism is further arranged between the concrete beam section 2 and the steel beam section 6 so as to form the integral structure of the bridge.
And finally, the steel bridge deck of the steel beam section 6 can be stiffened by adopting U ribs to form an orthotropic steel bridge deck plate, so that the buckling resistance and fatigue resistance are improved.
The embodiment also discloses a construction method of the self-anchored suspension bridge steel-concrete combined section, which comprises the following steps:
step A: transporting the steel beam section 6 prefabricated in a steel mill to a bridge site, and then manufacturing the concrete beam section 2 on site; after the concrete beam section 2 reaches 100% of the design strength, the concrete beam section 2 and the steel beam section 6 are subjected to position butt joint installation, and finally the concrete beam section 2 and the steel beam section 6 are connected through a steel-concrete connecting mechanism and a tensioning mechanism, so that a steel-concrete combined beam is formed;
and B: performing transverse connection construction on the steel-concrete composite beam to form an integral bridge structure;
and C: and finally, paving the bridge deck and constructing the auxiliary facilities.
Preferably, in the step a, the concrete beam section is manufactured by a sectional construction method of a hanging basket construction process.
The self-anchored suspension bridge steel-concrete combined section is mainly used for the side span position of a bridge to achieve the purpose of weight reduction, the steel beam section 6 is used for the mid-span position to achieve the purposes of reducing self weight and increasing the bridge span, and the steel-concrete combined section is mainly arranged at two sides near a main tower or near a mid-span support bending moment reverse bending point, so that the superior compression resistance of concrete is utilized, the tensile property of steel is utilized, the material properties of the concrete beam and the steel beam are fully exerted, the cost and the construction period are reduced, and the effects of reducing the steel consumption of the bridge relative to the conventional steel structures such as the normal steel beam and the steel-mixed beam and reducing the concrete consumption of the conventional concrete beam are achieved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a from anchor suspension bridge steel-thoughtlessly combine section, its characterized in that, includes concrete beam section and girder steel section, be connected through steel-thoughtlessly coupling mechanism and tensioning mechanism between concrete beam section and the girder steel section, tensioning mechanism is equipped with many stretch-draw prestressed tendons and carries out the stretch-draw connection including setting up the prestressed concrete region in the concrete beam section between prestressed concrete region and girder steel section.
2. The self-anchoring suspension bridge steel-concrete composite section according to claim 1, wherein the plurality of tensioned tendons are divided into an upper set of tendons, a middle set of tendons and a lower set of tendons, wherein the upper set of tendons, the middle set of tendons and the lower set of tendons each include a plurality of tensioned tendons, the upper set of tendons are located at top positions of the concrete beam section and the steel beam section, the middle set of tendons are located at middle positions of the concrete beam section and the steel beam section, and the lower set of tendons are located at bottom positions of the concrete beam section and the steel beam section.
3. The self-anchoring suspension bridge steel-concrete joint section according to claim 2, wherein the maximum load bearing capacity of the tensioned tendons of the middle set of tendons is greater than the maximum load bearing capacity of the tensioned tendons of the upper set of tendons and the lower set of tendons.
4. The self-anchored suspension bridge steel-concrete joint section according to any one of claims 1 to 3, wherein the steel-concrete connection mechanism comprises a top connection plate, a middle connection plate and a bottom connection plate which are integrally formed at the connection end of the steel beam section, the top connection plate and the bottom connection plate extend out of the connection end of the steel beam section and are correspondingly lapped on the top surface and the bottom surface of the concrete beam section, and the middle connection plate is vertically arranged and is tightly attached to the connection end of the concrete beam section; the top combination plate, the middle combination plate and the bottom combination plate are all connected with the concrete beam section through the pegs uniformly distributed in the array.
5. The self-anchoring suspension bridge steel-concrete joint section according to claim 4, wherein the concrete beam section is a T-beam, a pi-beam or a box beam.
6. The self-anchored suspension bridge steel-concrete composite section according to claim 5, wherein said steel beam section is an I-beam or a box beam.
7. The self-anchored suspension bridge steel-concrete composite section according to claim 6, wherein a transverse connecting mechanism is further provided between the concrete beam section and the steel beam section so as to form an integral bridge structure.
8. The self-anchored suspension bridge steel-concrete composite section according to claim 6, wherein the steel bridge deck of said steel beam section is stiffened with U-ribs to form orthotropic steel bridge deck.
9. The construction method of the self-anchored suspension bridge steel-concrete joint according to any one of claims 1 to 8, characterized by comprising the following steps:
step A: transporting the steel beam section prefabricated in a steel mill to a bridge site, and then manufacturing a concrete beam section on site; after the concrete beam section reaches 100% of the design strength, carrying out position butt joint installation on the concrete beam section and the steel beam section, and finally connecting the concrete beam section and the steel beam section through a steel-concrete connecting mechanism and a tensioning mechanism to form a steel-concrete combined beam;
and B: performing transverse connection construction on the steel-concrete composite beam to form an integral bridge structure;
and C: and finally, paving the bridge deck and constructing the auxiliary facilities.
10. The construction method according to claim 8, wherein in the step a, the concrete beam section is manufactured by a sectional construction method using a cradle construction process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110808382.0A CN113481819A (en) | 2021-07-16 | 2021-07-16 | Self-anchored suspension bridge steel-concrete combined section and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110808382.0A CN113481819A (en) | 2021-07-16 | 2021-07-16 | Self-anchored suspension bridge steel-concrete combined section and construction method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040568A (en) * | 2015-08-26 | 2015-11-11 | 长安大学 | Non-geocell steel-concrete joint section structure of hybrid girder bridge |
| KR101723847B1 (en) * | 2016-02-23 | 2017-04-07 | 주식회사 청우산업 | Steel-concrete composite bridge construction method using prestress introduction during erection of bridge |
| CN109505247A (en) * | 2018-11-23 | 2019-03-22 | 中交第三航务工程局有限公司 | Self-anchored suspension bridge closure segment construction technology |
-
2021
- 2021-07-16 CN CN202110808382.0A patent/CN113481819A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040568A (en) * | 2015-08-26 | 2015-11-11 | 长安大学 | Non-geocell steel-concrete joint section structure of hybrid girder bridge |
| KR101723847B1 (en) * | 2016-02-23 | 2017-04-07 | 주식회사 청우산업 | Steel-concrete composite bridge construction method using prestress introduction during erection of bridge |
| CN109505247A (en) * | 2018-11-23 | 2019-03-22 | 中交第三航务工程局有限公司 | Self-anchored suspension bridge closure segment construction technology |
Non-Patent Citations (1)
| Title |
|---|
| 陈琦: "钢－混凝土混合梁接合面受力分析", 《福州大学学报(自然科学版)》 * |
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Application publication date: 20211008 |