CN114232498B - A multifunctional support erection method for construction of a mid-span steel tube concrete arch bridge - Google Patents
A multifunctional support erection method for construction of a mid-span steel tube concrete arch bridge Download PDFInfo
- Publication number
- CN114232498B CN114232498B CN202210014025.1A CN202210014025A CN114232498B CN 114232498 B CN114232498 B CN 114232498B CN 202210014025 A CN202210014025 A CN 202210014025A CN 114232498 B CN114232498 B CN 114232498B
- Authority
- CN
- China
- Prior art keywords
- bracket
- platform
- arch rib
- steel pipe
- arch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 63
- 239000010959 steel Substances 0.000 title claims abstract description 63
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 27
- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 abstract 1
- 239000004566 building material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
- E01D4/00—Arch-type bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明公开了一种中承式钢管混凝土拱桥施工的多功能支架架设方法，按以下步骤进行：（1）搭设下层拱肋拼装支架，兼做横梁存放安装平台；（2）在横梁拼接支架平台上将横梁节段焊接接长为整根；将拼接完成的横梁吊至横梁存放安装平台存放；（3）继续搭设上层拱肋拼装支架至设计位置，支架搭设完成后进行拱肋架设，并进行拱肋混凝土压注施工；（4）待混凝土龄期及强度满足要求后，拆除上层拱肋拼装支架；（5）继续安装吊杆，并利用履带吊安装提前放置在横梁存放安装平台上对应位置的横梁；（6）全部施工完成后，拆除剩余支架。本发明具有支架受力安全可靠，可提高拱肋架设、横梁安装的施工精度和质量，节约成本、缩短施工工期等优点。
The invention discloses a multifunctional support erection method for the construction of a mid-span steel tube concrete arch bridge, which is carried out in the following steps: (1) erecting a lower arch rib assembly support, which also serves as a beam storage and installation platform; (2) welding and extending the beam segments into a whole on the beam splicing support platform; hoisting the spliced beam to the beam storage and installation platform for storage; (3) continuing to erect the upper arch rib assembly support to the designed position, and after the support is erected, the arch rib is erected, and the arch rib concrete is poured; (4) after the concrete age and strength meet the requirements, the upper arch rib assembly support is removed; (5) continuing to install the suspension rod, and using the crawler crane to install the beam placed in advance at the corresponding position on the beam storage and installation platform; (6) after all the construction is completed, the remaining supports are removed. The invention has the advantages of safe and reliable support force, can improve the construction accuracy and quality of arch rib erection and beam installation, save costs, shorten the construction period, etc.
Description
Technical Field
The invention relates to the technical field of arch bridge construction, in particular to a method for erecting a multifunctional bracket for middle-bearing type steel tube concrete arch bridge construction.
Background
In the construction process of the steel pipe concrete arch bridge, arch rib erection is a key process for the construction of the whole bridge, and the quality of the construction directly influences the safety and stability of the bridge. The conventional arch rib bracket has single function, only can complete arch rib erection, and the beam bracket needs to be erected again for beam assembly and installation. The construction period is long, the cost is high, and the arch rib erection and the beam installation accuracy are poor.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a method for erecting a multifunctional bracket for constructing a middle-bearing type steel pipe concrete arch bridge, which forms the multifunctional bracket integrating arch rib erection, beam splicing and beam storage and installation, and has the advantages of safe and reliable bracket stress, improved construction precision and quality of arch rib erection and beam installation, cost saving, construction period shortening and the like.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method for erecting a multifunctional bracket for middle-bearing type steel tube concrete arch bridge construction is carried out according to the following steps:
(1) Setting up a lower arch rib assembly bracket which is also used as a crossbeam storage and installation platform;
(2) Setting up a beam splicing bracket platform, and welding and lengthening the beam sections on the beam splicing bracket platform into a whole; hanging the spliced cross beams to corresponding positions on a cross beam storage and installation platform below the arch ribs for storage;
(3) Continuously erecting an upper arch rib assembly bracket to a designed position, erecting an arch rib after the upper arch rib assembly bracket is erected, and performing arch rib concrete injection construction by using an upper arch rib assembly bracket top layer operation platform;
(4) After the age and strength of the concrete meet the requirements, dismantling the upper arch rib splicing bracket;
(5) The boom is continuously installed, the crawler crane is used for installing the cross beam which is placed at the corresponding position on the cross beam storage and installation platform in advance, after the cross beam is connected with the boom, a longitudinal beam between the cross beams is constructed, and a main stress structure of the bridge deck system is formed;
(6) And after the whole construction is completed, removing the rest support.
Further, in the step (1), the lower structure of the lower arch rib assembly bracket adopts steel pipe columns, four steel pipe columns are in a group, and longitudinal and transverse connection systems are arranged among the steel pipe columns to form a column;
The upright posts are arranged in at least two rows, the upright posts of each row are connected through a lower layer connection system, and the lower layer connection system is used as a cross beam storage and installation platform of the members such as the cross beam; the crossbeam is erected between the crossbeam storage and installation platforms.
Further, when the bearing platform is arranged, the steel pipe column is connected with the embedded part of the bearing platform through bolts, when the water is in the water, and driving the steel pipe column into a pile foundation.
Further, the lower layer connection system is connected with the steel pipe column through brackets.
Further, a platform panel is arranged on the lower layer connecting system, the platform panel is of a structure of work steel and pattern steel plates, and the work steel and the upper chord of the lower layer connecting system are firmly welded through stiffening plates.
Further, in the step (2), the erection method of the beam splicing bracket platform is as follows:
The river bank sides at two ends of the main arch rib splicing bracket are respectively provided with a beam splicing bracket which is distributed at the beam splicing position; the lower structure of the beam splicing bracket adopts steel pipe columns and piles are driven into a pile foundation; the steel pipe columns are arranged in a group, and a longitudinal connecting system and a transverse connecting system are arranged among the steel pipe columns to form an upright post; the top mounting distribution beam and the platform panel are arranged above the upright posts to form a beam splicing support platform, wherein the platform panel is of a work steel and pattern steel plate structure.
Further, in the step (2), the method for welding and lengthening the beam sections into whole roots on the beam splicing bracket platform is as follows: the beam is divided into three sections, beam sections are sequentially hoisted to a beam splicing support platform by adopting a crawler crane, and the beam sections are welded and lengthened into a whole on the beam splicing support platform.
Further, a group of four steel pipe columns are connected by horizontal diagonal rods, and parallel connection is arranged between the horizontal and longitudinal connection systems to form a space truss structure.
Further, in the step (3), continuously erecting an upper arch rib assembly bracket to a design position, wherein the heights of the steel pipe column tops are linearly arranged according to the axial elevation of the arch ribs; the upper end of the upright post is provided with an upper layer connection system, and the operation platform is supported at the top of the upper layer connection system;
The top end of the upright post is provided with a distribution beam, the top of the distribution beam is provided with a saddle and arch rib adjusting facilities, arch rib erection is carried out after the bracket is erected, the arch rib erection and hoisting sequence is that arch feet at two ends are installed from the middle, and finally, the arch ribs are folded in the midspan.
The beneficial effects of the invention are as follows:
1. The arch rib erection, beam splicing and beam storage are integrated, and the structure is safe, reliable and high in functionality.
2. The construction precision and quality of arch rib erection and beam installation can be improved.
3. The beam bracket is saved in building materials and time, the construction period is shortened, and the cost is saved.
Drawings
FIG. 1 is a schematic view of the erection of a lower arch rib assembled bracket;
FIG. 2 is a schematic view of the erection of an upper arch rib assembled bracket;
FIG. 3 is a schematic illustration of rib construction;
FIG. 4 is a schematic view of an assembled bracket with an upper arch rib removed;
FIG. 5 is a boom cross beam installation and bracket removal schematic;
FIG. 6 is a plan view of a bracket;
FIG. 7 is a cross-beam storage mounting platform layout.
In the figure: the steel pipe column is 1, the lower layer connection system is 21, the upper layer connection system is 22, the distribution beams are 31 and 32, the lower layer arch rib assembling bracket is 4, the cross beam assembling bracket platform is 5, the cross beam storage and installation platform is 6, the upper layer arch rib assembling bracket is 7, the operation platform is 8, the saddle is 9, the suspender is 10, and the longitudinal beam is 11.
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
As shown in fig. 1 to 7, the method for erecting the multifunctional bracket for constructing the middle-bearing type steel tube concrete arch bridge in the embodiment comprises the following steps:
(1) The lower arch rib assembling bracket 4 is erected and also serves as a cross beam storage and installation platform 6 (see figure 1).
Specifically, the lower structure of the lower arch rib assembly bracket 4 adopts steel pipe columns 1, four steel pipe columns 1 are in a group, and longitudinal and transverse connection systems are arranged between the steel pipe columns 1 to form an upright post. When on the bearing platform, the steel pipe column 1 is connected with the embedded part of the bearing platform through bolts, when in water, the steel pipe column 1 is driven into a pile foundation.
In this embodiment, the columns are arranged in two rows, and each row of columns is connected by a lower-layer connecting system 21, and the lower-layer connecting system 21 is connected with the steel pipe column 1 by brackets. The lower layer connection system 21 is used as a beam storage and installation platform 6 of a beam and other rod pieces, and the beam is erected between the beam storage and installation platforms 6 of two rows of upright posts.
In this embodiment, the lower layer connection system 21 is provided with a platform panel, the platform panel is in a structure of a work steel 14 and a patterned steel plate 15, and the work steel and the upper chord of the lower layer connection system 21 are firmly welded through a stiffening plate (see fig. 7).
(2) Setting up a beam splicing bracket platform 5, and welding and lengthening the beam sections on the beam splicing bracket platform 5 into a whole; and hanging the spliced cross beams to corresponding positions on the cross beam storage and installation platform 6 below the arch ribs for storage.
The erection method of the beam splicing bracket platform 5 is as follows:
The river bank sides at two ends of the main arch rib splicing bracket are respectively provided with a beam splicing bracket which is distributed at the beam splicing position; the lower structure of the beam splicing bracket adopts a steel pipe column 1, and a pile foundation is driven in; a group of four steel pipe columns 1, wherein longitudinal and transverse connection systems are arranged among the steel pipe columns to form an upright post; the top mounting distribution beam 31 is arranged above the upright post, and the platform panel is of a work steel and pattern steel plate structure to form the cross beam splicing bracket platform 5.
In this embodiment, the total length of the cross beam 13 is 37.5m, and the cross beam is divided into 3 sections each of which is 12.5m in length in consideration of the site transportation conditions. And (3) sequentially hoisting the beam sections to a beam splicing bracket platform 5 by adopting a 150t crawler crane, and welding and lengthening the beam sections on the beam splicing bracket platform 5 into a whole.
(3) Continuously erecting an upper arch rib assembly bracket 7 to a design position (see figure 2), wherein the top elevation of the steel pipe column 1 is linearly arranged according to the elevation of the axis of the arch rib; the upper end of the upright post is provided with an upper layer connection system 22, and the operation platform 8 is supported on top of the upper layer connection system 22.
The top ends of the upright posts are provided with distribution beams 32, the tops of the distribution beams 32 are provided with saddles 9 and arch rib adjusting facilities, arch rib erection is carried out after the bracket is erected (see figure 3), the arch rib erection and hoisting sequence is that arch feet at two ends are installed from the middle, and finally, the arch ribs are folded in the midspan, and arch rib concrete injection construction is carried out by utilizing a bracket top layer operation platform.
(4) After the age and strength of the concrete meet the requirements, dismantling the upper arch rib splicing bracket 7 (see fig. 4);
(5) Continuously installing the suspenders, lifting the beams which are placed at the corresponding positions on the beam storage and installation platform in advance by using 2 crawler cranes, and constructing longitudinal beams 11 between the beams after the beams are connected with the suspenders 10 to form a main stress structure of the bridge deck system;
(6) After the entire construction is completed, the remaining brackets are removed (see fig. 5).
The support is connected with a group of four steel pipe columns in a span manner through horizontal diagonal rods, and parallel connection is arranged between transverse and longitudinal connection systems, so that a space truss structure is formed, and overall stability is enhanced.
The multifunctional bracket erection method for the middle-bearing type steel tube concrete arch bridge construction forms a multifunctional bracket integrating arch rib erection, beam splicing and beam storage and installation, and the bracket structure is safe, reliable and strong in functionality; the construction precision and quality of arch rib erection and beam installation can be improved; the beam bracket is saved in building materials and time, the construction period is shortened, and the cost is saved.
The above embodiments are only for illustrating the technical solution of the present invention, and it should be understood by those skilled in the art that although the present invention has been described in detail with reference to the above embodiments: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, which is intended to be encompassed by the claims.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present invention.
Claims (5)
1. A method for erecting a multifunctional bracket for middle-bearing type steel tube concrete arch bridge construction is characterized by comprising the following steps:
(1) Setting up a lower arch rib assembly bracket which is also used as a crossbeam storage and installation platform;
(2) Setting up a beam splicing bracket platform, and welding and lengthening the beam sections on the beam splicing bracket platform into a whole; hanging the spliced cross beams to corresponding positions on a cross beam storage and installation platform below the arch ribs for storage;
(3) Continuously erecting an upper arch rib assembly bracket to a designed position, erecting an arch rib after the upper arch rib assembly bracket is erected, and performing arch rib concrete injection construction by using an upper arch rib assembly bracket top layer operation platform;
(4) After the age and strength of the concrete meet the requirements, dismantling the upper arch rib splicing bracket;
(5) Continuously installing the suspenders, installing the cross beams which are placed at corresponding positions on the cross beam storage and installation platform in advance, and constructing longitudinal beams between the cross beams after the cross beams are connected with the suspenders to form a main stress structure of the bridge deck system;
(6) After the whole construction is completed, the rest support is dismantled;
In the step (1), the lower structure of the lower arch rib assembly bracket adopts a steel pipe column, four steel pipe columns are in a group, and longitudinal and transverse connection systems are arranged among the steel pipe columns to form a column;
The upright posts are arranged in at least two rows, the upright posts of each row are connected through a lower layer connection system, and the lower layer connection system is used as a cross beam storage and installation platform; the cross beam is erected between the cross beam storage and installation platforms;
in the step (2), the erecting method of the beam splicing bracket platform is as follows:
The river bank sides at two ends of the main arch rib splicing bracket are respectively provided with a beam splicing bracket which is distributed at the beam splicing position; the lower structure of the beam splicing bracket adopts steel pipe columns and piles are driven into a pile foundation; the steel pipe columns are arranged in a group, and a longitudinal connecting system and a transverse connecting system are arranged among the steel pipe columns to form an upright post; a top mounting distribution beam and a platform panel are arranged above the upright posts to form a beam splicing bracket platform, wherein the platform panel is of a work steel and pattern steel plate structure;
In the step (2), the method for welding and lengthening the beam sections into whole roots on the beam splicing bracket platform comprises the following steps: the beam is divided into three sections, beam sections are sequentially hoisted to a beam splicing bracket platform by adopting crawler cranes, and the beam sections are welded and lengthened into a whole on the beam splicing bracket platform;
In the step (3), continuously erecting an upper arch rib assembly bracket to a design position, wherein the heights of the steel pipe column tops are linearly arranged according to the elevation of the arch rib axes; the upper end of the upright post is provided with an upper layer connection system, and the operation platform is supported at the top of the upper layer connection system;
The top end of the upright post is provided with a distribution beam, the top of the distribution beam is provided with a saddle and arch rib adjusting facilities, arch rib erection is carried out after the bracket is erected, the arch rib erection and hoisting sequence is that arch feet at two ends are installed from the middle, and finally, the arch ribs are folded in the midspan.
2. The method for erecting the multifunctional bracket for constructing the middle-bearing type steel tube concrete arch bridge, which is characterized by comprising the following steps of: when the support is arranged on the bearing platform, the steel pipe column is connected with the bearing platform embedded part through bolts, when the water is in the water, and driving the steel pipe column into a pile foundation.
3. The method for erecting the multifunctional bracket for constructing the middle-bearing type steel tube concrete arch bridge, which is characterized by comprising the following steps of: the lower layer connection system is connected with the steel pipe column through bracket.
4. The method for erecting the multifunctional bracket for constructing the middle-bearing type steel tube concrete arch bridge, which is characterized by comprising the following steps of: the lower layer connecting system is provided with a platform panel which is of a structure of a work steel and a pattern steel plate, and the work steel and the upper chord of the lower layer connecting system are firmly welded through a stiffening plate.
5. The method for erecting the multifunctional bracket for constructing the middle-bearing type steel tube concrete arch bridge, which is characterized by comprising the following steps of: and a group of four steel pipe columns are connected by horizontal diagonal rods, and parallel connection is arranged between the transverse and longitudinal connection systems to form a space truss structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210014025.1A CN114232498B (en) | 2022-01-07 | 2022-01-07 | A multifunctional support erection method for construction of a mid-span steel tube concrete arch bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210014025.1A CN114232498B (en) | 2022-01-07 | 2022-01-07 | A multifunctional support erection method for construction of a mid-span steel tube concrete arch bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114232498A CN114232498A (en) | 2022-03-25 |
| CN114232498B true CN114232498B (en) | 2024-11-15 |
Family
ID=80745963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210014025.1A Active CN114232498B (en) | 2022-01-07 | 2022-01-07 | A multifunctional support erection method for construction of a mid-span steel tube concrete arch bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114232498B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562936A (en) * | 2014-12-08 | 2015-04-29 | 中铁六局集团有限公司 | Construction method for continuous tie bar steel tube arch bridge |
| CN111593673A (en) * | 2020-06-12 | 2020-08-28 | 安徽省公路桥梁工程有限公司 | Steel truss arch bridge and construction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6407601B2 (en) * | 2014-07-24 | 2018-10-17 | 株式会社Ｉｈｉインフラシステム | Bridge method for arch bridge |
| CN109989349A (en) * | 2019-03-26 | 2019-07-09 | 中铁七局集团有限公司 | A kind of Continuous Beam-arch Bridge steel tube arch rib construction method of installation |
| CN110205938B (en) * | 2019-05-30 | 2020-07-31 | 中铁四局集团第二工程有限公司 | Steel pipe arch installation method of through beam-arch combination bridge |
-
2022
- 2022-01-07 CN CN202210014025.1A patent/CN114232498B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104562936A (en) * | 2014-12-08 | 2015-04-29 | 中铁六局集团有限公司 | Construction method for continuous tie bar steel tube arch bridge |
| CN111593673A (en) * | 2020-06-12 | 2020-08-28 | 安徽省公路桥梁工程有限公司 | Steel truss arch bridge and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114232498A (en) | 2022-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208072213U (en) | A kind of steel box-girder installation temporary support | |
| CN211947993U (en) | Support for large-span cast-in-situ bridge construction | |
| CN102777050B (en) | Assembly type jig frame for longspan pipe truss roof girder | |
| CN114263114A (en) | Construction system and construction method of large-section steel box girder | |
| CN211006341U (en) | Assembled strength nature skeleton suitable for mound tower reinforcing bar location | |
| CN111335137A (en) | Deck type arch bridge structure and construction method thereof | |
| CN111395186B (en) | Method for erecting temporary pier of large-span steel-concrete composite beam cable-stayed bridge | |
| CN114351584A (en) | Special-shaped steel ladle concrete upper tower column and construction method thereof | |
| CN114232498B (en) | A multifunctional support erection method for construction of a mid-span steel tube concrete arch bridge | |
| CN212129839U (en) | Steel pipe reinforcing column structure | |
| CN210066510U (en) | Stride interim bearing structure of girder steel of existing circuit | |
| CN215164738U (en) | Tied-rod arch type fast-splicing support | |
| CN213233106U (en) | An arch bracket | |
| CN115928682A (en) | Modular drilling platform and construction method | |
| CN217352174U (en) | Pier edge side span cast-in-place support | |
| CN220450682U (en) | Temporary construction support based on new bridge tie beam | |
| CN222160933U (en) | Support for annular tower construction | |
| CN216947913U (en) | Arch rib supporting structure of large-tonnage bridge | |
| CN221167505U (en) | Bridge reinforcing apparatus of modularization support | |
| CN220450680U (en) | Temporary construction support erected on old bridge | |
| CN222781957U (en) | A temporary support for erecting a large-span steel box girder by a bridge erection machine | |
| CN217352141U (en) | Construction system of large-section steel box girder | |
| CN221740929U (en) | A passive sliding support system for rear-anchored concrete beams of a large-span self-anchored suspension bridge | |
| CN217678621U (en) | Foundation structure of standard H-shaped steel tower | |
| CN219908599U (en) | Integral construction platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |