CN111364511A - Interface structure for subway station and property development and rail transit subway platform - Google Patents
Interface structure for subway station and property development and rail transit subway platform Download PDFInfo
- Publication number
- CN111364511A CN111364511A CN202010238897.7A CN202010238897A CN111364511A CN 111364511 A CN111364511 A CN 111364511A CN 202010238897 A CN202010238897 A CN 202010238897A CN 111364511 A CN111364511 A CN 111364511A
- Authority
- CN
- China
- Prior art keywords
- interface
- station
- property development
- columns
- subway
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 43
- 239000010959 steel Substances 0.000 claims description 43
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000000284 resting effect Effects 0.000 description 7
- 239000011150 reinforced concrete Substances 0.000 description 5
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to an interface structure for subway stations and property development, which comprises a laying beam for laying a station top plate, two interface columns and an interface bottom beam, wherein the interface columns can be connected with existing frame columns, the interface bottom beam can be connected with a station middle plate, the laying beam is positioned at the tops of the two interface columns, the two interface columns are both positioned on the interface bottom beam, the laying beam is provided with a mounting position for accessing a property development top plate, and the interface bottom beam is provided with a mounting position for accessing a property development bottom plate. Still include a track traffic subway platform, including existing frame post, station roof, station medium plate, property development roof and property development bottom plate and foretell subway station and the interface structure of property development. The invention solves the problem of arrangement of a station top plate and a station middle plate in a subway station and a property development top plate and a property development bottom plate in property development by matching the laying beam, the interface column and the interface bottom beam.
Description
Technical Field
The invention relates to the technical field of underground space, in particular to an interface structure for subway stations and property development and a rail transit subway platform.
Background
In order to realize the comprehensive benefits of subway operation, property development is usually carried out around a subway station and the subway station is accessed to a station hall layer. However, since the speed of planning and construction of the property development project is later than that of the station, the property development project cannot be paid enough attention during the construction of the station, and cases that the interface is not reserved in advance or the interface is difficult to meet the stress requirement occur sometimes, the interface needs to be modified so as to meet the requirements of building functions and structural stress.
For the interface reconstruction of a station and property development interface frame which is reserved but does not meet the stress requirement, an inverted U-shaped beam-column system is poured in the frame again to support and reinforce an interface, or an existing roof is chiseled off, reinforcing steel bars are reserved, upper stress beams are poured again, reinforcing steel bars can be planted at the position of the roof of the station to supplement frame beams, however, the measures have problems, such as the ① frame is used for supporting and reinforcing the interface again, the measure needs to be used for manufacturing a beam-column structure in the original frame again, occupies part of the interface width, is difficult to meet evacuation width or block pipelines, is difficult to coordinate and time-consuming and labor-consuming, the ② step is used for chiseling the roof of the subway at the interface part, the reinforcing steel bars are reserved and are used for manufacturing frame beams again, the method has large engineering quantity, has great influence on the station, the earthing of the roof of the station needs to be removed, the traffic is blocked, generally does not have construction conditions, the ③ is used for planting the reinforcing steel bars and pouring the frame beams on the roof, the method also needs to unload the earthing above the roof, has great influence on the safety of the new construction of the development and can not only solve the potential safety problem of the building foundation and the potential of the stress development and the safety disturbance of the building.
Disclosure of Invention
The invention aims to provide an interface structure for subway stations and property development and a rail transit subway platform, which are stable and reliable, do not occupy the width of the existing entrance and exit frame of the station, do not need to unload soil mass above the station, do not influence the interior decoration of the station, and furthest reduce the disturbance to the top plate of the station.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: the interface structure comprises a shelving beam for shelving a station top plate, two interface columns and an interface bottom beam, wherein the interface columns can be connected with existing frame columns, the interface bottom beam can be connected with a station middle plate, the shelving beam is located at the tops of the two interface columns, the two interface columns are located on the interface bottom beam, the shelving beam is provided with a mounting position for a property development top plate to be connected, and the interface bottom beam is provided with a mounting position for a property development bottom plate to be connected.
Further, the placing beam is an L-shaped beam, the horizontal section of the L-shaped beam is located at the tops of the two interface columns, the upper surface of the horizontal section of the L-shaped beam is a placing surface for placing the station top plate, and the placing position for the property development top plate to be connected is arranged at the horizontal section of the L-shaped beam.
Furthermore, the L-shaped beam is provided with a plurality of stressed steel bars, and the number of the stressed steel bars on the upper surface of the horizontal section, the number of the stressed steel bars on the lower surface of the horizontal section and the number of the stressed steel bars on the upper surface of the vertical section of the L-shaped beam are all more than the number of the stressed steel bars on other parts.
Furthermore, the length of the horizontal section is 600-800 mm, and the thickness is 900-1100 mm.
Furthermore, the interface floorbar is provided with a reserved steel bar which can be connected with the middle plate of the station.
Furthermore, the interface bottom beam is also provided with a reserved steel bar connector.
Furthermore, the interface bottom beam and the two interface columns are provided with a plurality of stressed steel bars.
The embodiment of the invention provides another technical scheme: a rail transit subway platform comprises existing frame columns, a station top plate, a station middle plate, a property development top plate, a property development bottom plate and the interface structure of the subway station and the property development.
Furthermore, the existing frame column and the interface column are connected by implanting two rows of steel bars, and the two rows of steel bars are arranged at intervals.
Further, the width of interface post equals with the width of existing frame post, and all between 500 ~ 700 mm.
Compared with the prior art, the invention has the beneficial effects that: through shelving roof beam, interface post and interface floorbar three's cooperation, solved station roof and the station medium plate in the subway station to and the arrangement problem of property development roof and property development bottom plate in the property development, interface structure is stable reliable, does not occupy the existing access & exit frame width of station, need not to uninstall the station top soil body, reduces the disturbance to the station roof, need not cause the influence to station interior decoration, furthest has reduced the disturbance to the station roof.
Drawings
Fig. 1 is a top view of a rail transit subway platform according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic diagram of an interface column of an interface structure for subway stations and property development according to an embodiment of the present invention;
fig. 4 is a schematic view of an interface bottom beam of an interface structure for subway station and property development according to an embodiment of the present invention;
fig. 5 is a schematic view of an L-shaped beam of an interface structure for subway stations and property development according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line 1-1 of FIG. 5;
in the reference symbols: 1-existing frame columns; 2-interface column; 3-L-shaped beam; 30-a resting surface; 31-horizontal segment; 32-vertical section; 4-interface bottom beam; 40-reserving a steel bar connector; 5-station roof; 6-station middle plate; 7-property development ceiling; 8-property development floor; a-property development side; b-subway station side; c-stressed steel bars.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, an embodiment of the present invention provides an interface structure for a subway station and property development, including a resting beam for resting a top plate 5 of the station, two interface columns 2 connectable to an existing frame column 1, and two interface bottom beams 4 connectable to a middle plate 6 of the station, where the resting beam is located on top of the two interface columns 2, the two interface columns 2 are both located on the interface bottom beams 4, the resting beam has a placement position for accessing a property development top plate 7, and the interface bottom beams 4 have a mounting position for accessing a property development bottom plate 8. In this embodiment, the shelving beam, the interface column 2 and the interface bottom beam 4 form a portal frame structure, wherein the shelving beam can be used for shelving the station top plate 5, and after the shelving beam is installed, the station top plate is cast in place through reinforced concrete so as to achieve the purpose of stability and reliability, so that large disturbance on the station top plate 5 can be avoided, the safety of the interface is ensured, the interface column 2 is newly made, the reconstruction of the existing frame column 1 is avoided, the influence on the inside of the station is reduced, and the unloading of soil above the top plate is also avoided, the interface column 2 is used for bearing the shelving beam above the interface column 2, and after the shelving is well done, the reinforced concrete is cast in place so as to achieve the purpose of stability and reliability, the interface bottom beam 4 is arranged at the bottom and can bear the load of the interface column 2 for transferring blanking, and after the shelving. Preferably, the width of the interface column 2 is equal to the width of the existing frame column 1, and both the widths are 500-700 mm, preferably 600 mm. In the platform, the subway station and the property development can be divided into a subway station side b and a property development side a, wherein a station top plate 5 in the subway station is placed on a placing beam, a station middle plate 6 and an interface bottom beam 4 are installed together, a property development top plate 7 in the property development is connected on the placing beam, and a property development bottom plate 8 is connected on the interface bottom beam 4, so that the interface structure can stably and reliably place all basic structures together to realize the perfect butt joint of the subway station and the property development, and a plurality of defects in the prior art mentioned in the background technology can not occur.
The following are specific examples:
in order to optimize the above solution, please refer to fig. 2, fig. 5 and fig. 6, the resting beam is an L-shaped beam 3, a horizontal section 31 of the L-shaped beam 3 is located at the top of the two interface columns 2, and an upper surface of the horizontal section 31 of the L-shaped beam 3 is a resting surface 30 on which the station roof 5 rests, and a placement position for the property development roof 7 to access is located at the horizontal section 31 of the L-shaped beam 3. In the present embodiment, in order to not occupy the width of the existing entrance/exit frame of the station and reduce the occupied space, the above-mentioned placing beam can be designed as an L-shaped beam 3, for convenience of description, the L-shaped beam 3 is defined as two parts, namely a horizontal section 31 and a vertical section 32, wherein the placing surface 30 is on the upper surface of the horizontal section 31, the horizontal section 31 is a protruding overhanging section with a length of preferably 700mm and a thickness of preferably 1000mm, extends to the lower surface of the station roof 5 and is poured in close contact therewith, and plays a role of supporting and reinforcing the station roof 5, the earth and vehicle loads above the station roof 5 act on the station roof 5, the roof transmits the force to the horizontal section 31, and the horizontal section 31 finally transmits the force to the interface columns 2 at both sides, the horizontal section 31 has a length of only 700mm and a small moment, which causes the bending moment at the upper part of the edge of the L-shaped beam 3 to be controllable, and the horizontal section 31 has a thickness of 1000mm calculated to be sufficient to withstand the shear stress transmitted from the upper portion. The L-shaped beam 3 is reserved with steel bars near the property development side a to be connected into a property development top plate 7, and then concrete pouring is performed.
Further optimizing the above scheme, please refer to fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the L-shaped beam 3 has a plurality of stressed steel bars c, and the number of the stressed steel bars c on the upper surface of the horizontal section 31, the number of the stressed steel bars c on the lower surface of the horizontal section 31 and the number of the stressed steel bars c on the upper surface of the vertical section 32 of the L-shaped beam 3 are all greater than the number of the stressed steel bars c on other positions. In the present embodiment, the stress steel bars c are used to increase the strength, so that the L-shaped beam 3 can bear a larger tensile force, and the stress steel bars c are arranged at the upper surface of the horizontal section 31, the lower surface of the horizontal section 31, and the upper surface of the vertical section 32 of the L-shaped beam 3, and the number of the stress steel bars c is larger to bear a larger tensile force. Preferably, the interface bottom beam 4 and the two interface columns 2 are also provided with a plurality of stressed steel bars c.
As an optimized solution of the embodiment of the present invention, please refer to fig. 2, the interface bottom beam 4 is provided with a reserved steel bar capable of being connected with the station middle plate 6. Preferably, the interface bottom beam 4 is further provided with a reserved steel bar connector 40. The interface bottom beam 4 and the station middle plate 6 are connected through the reserved steel bars and the reserved steel bar connector 40, and then concrete is cast in situ to complete the connection of the two. Interface floorbar 4 connects station medium plate 6 to reserve the reinforcing bar, undertakes the load that interface post 2 transmitted down, and interface floorbar 4 is close to property development side a and reserves reinforcing bar and inserts property development bottom plate 8.
Referring to fig. 1 to 6, an embodiment of the present invention provides a rail transit subway platform, including an existing frame column 1, a station top plate 5, a station middle plate 6, a property development top plate 7, and a property development bottom plate 8, and further including the above interface structure for subway station and property development, where the interface column 2 is arranged close to the existing frame column 1, the station top plate 5 is located on the rest beam, the property development top plate 7 is connected to the rest beam, and both the station middle plate 6 and the property development bottom plate 8 are connected to the interface bottom beam 4. In the embodiment, the above-mentioned interface structure is applied in a rail transit subway platform, the placing beam, the interface column 2 and the interface bottom beam 4 form a portal frame structure, wherein, the laying beam can lay the station roof 5, and cast in situ by reinforced concrete after installation to achieve the purpose of stability and reliability, thereby avoiding large disturbance to the station roof 5, ensuring the safety of the interface, the new manufacture of the interface column 2 avoids the reconstruction of the existing frame column 1, reduces the influence on the interior of the station and avoids the unloading of the soil above the top plate, the interface column 2 is used for bearing the placing beam above the interface column and is cast in situ by reinforced concrete after being placed so as to achieve the purpose of stability and reliability, the interface bottom beam 4 is arranged at the bottom, can bear the load of the interface column 2 for transferring blanking, and is cast in situ by reinforced concrete after being arranged. In the platform, the subway station and the property development can be divided into a subway station side b and a property development side a, wherein a station top plate 5 in the subway station is placed on a placing beam, a station middle plate 6 and an interface bottom beam 4 are installed together, a property development top plate 7 in the property development is connected on the placing beam, and a property development bottom plate 8 is connected on the interface bottom beam 4, so that the interface structure can stably and reliably place all basic structures together to realize the perfect butt joint of the subway station and the property development, and a plurality of defects in the prior art mentioned in the background technology can not occur.
As an optimized scheme of the embodiment of the invention, the existing frame column 1 and the interface column 2 are connected by implanting two rows of steel bars, and the two rows of steel bars are arranged at intervals. In this embodiment, the diameter of the two rows of implanted steel bars is preferably 20mm, the longitudinal distance between the steel bars is preferably 300mm, and the two steel bars are tightly attached through the implanted steel bars.
As an optimized scheme of the embodiment of the invention, the contact part of the station top plate 5 and the laying beam is connected through a steel bar. In the present embodiment, a row of steel bars with a diameter of preferably 20mm is implanted at a side of the station roof 5 adjacent to where the vertical section 32 of the L-shaped beam 3 contacts, and a row of steel bars with a diameter of preferably 20mm is implanted at a side of the station roof 5 adjacent to where the horizontal section 31 of the L-shaped beam 3 contacts, thereby achieving a tight connection with the L-shaped beam 3.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an interface structure of subway station and property development which characterized in that: the interface beam comprises a placing beam for placing a station top plate, interface columns capable of being connected with existing frame columns and interface bottom beams capable of being connected with a station middle plate, wherein the number of the interface columns is two, the placing beam is located at the tops of the two interface columns, the two interface columns are located on the interface bottom beams, the placing beam is provided with a mounting position for a property development top plate to be connected, and the interface bottom beams are provided with mounting positions for a property development bottom plate to be connected.
2. The interface structure for subway station and property development as claimed in claim 1, wherein: the laying beam is an L-shaped beam, the horizontal section of the L-shaped beam is located at the tops of the two interface columns, the upper surface of the horizontal section of the L-shaped beam is a laying surface for laying the station top plate, and a placement position for the property development top plate to be connected is arranged at the horizontal section of the L-shaped beam.
3. The interface structure for subway station and property development as claimed in claim 2, wherein: the L-shaped beam is provided with a plurality of stressed steel bars, and the number of the stressed steel bars on the upper surface of the horizontal section, the number of the stressed steel bars on the lower surface of the horizontal section and the number of the stressed steel bars on the upper surface of the vertical section of the L-shaped beam are all more than the number of the stressed steel bars on other parts.
4. The interface structure for subway station and property development as claimed in claim 2, wherein: the length of the horizontal section is 600-800 mm, and the thickness is 900-1100 mm.
5. The interface structure for subway station and property development as claimed in claim 1, wherein: the interface floorbar is equipped with the reservation reinforcing bar that can be connected with the station medium plate.
6. The interface structure for subway station and property development as claimed in claim 4, wherein: the interface floorbar still is equipped with the connector of reserve reinforcing bar.
7. The interface structure for subway station and property development as claimed in claim 1, wherein: the interface floorbar and two interface columns are also provided with a plurality of stressed steel bars.
8. The utility model provides a track traffic subway platform, includes existing frame post, station roof, station medium plate, property development roof and property development bottom plate, its characterized in that: the subway station and property development interface structure as claimed in any one of claims 1 to 7, wherein said interface columns are arranged close to said existing frame columns, said station top plate is seated on said rest beams, said property development top plate is connected with said rest beams, and said station middle plate and said property development bottom plate are connected with said interface bottom beams.
9. The rail transit subway platform as claimed in claim 8, wherein: the existing frame columns are connected with the interface columns through two rows of implanted steel bars, and the two rows of steel bars are arranged at intervals.
10. The rail transit subway platform as claimed in claim 8, wherein: the width of interface post equals with the width of existing frame post, and all between 500 ~ 700 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010238897.7A CN111364511A (en) | 2020-03-30 | 2020-03-30 | Interface structure for subway station and property development and rail transit subway platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010238897.7A CN111364511A (en) | 2020-03-30 | 2020-03-30 | Interface structure for subway station and property development and rail transit subway platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111364511A true CN111364511A (en) | 2020-07-03 |
Family
ID=71204890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010238897.7A Pending CN111364511A (en) | 2020-03-30 | 2020-03-30 | Interface structure for subway station and property development and rail transit subway platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111364511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112499467A (en) * | 2020-11-24 | 2021-03-16 | 中建八局轨道交通建设有限公司 | Subway station expanded end assembled gantry crane track foundation and construction method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007138412A (en) * | 2005-11-15 | 2007-06-07 | Shimizu Corp | Girder-slab structure of structure, and extension structure |
| CN209179541U (en) * | 2018-10-26 | 2019-07-30 | 中铁第一勘察设计院集团有限公司 | The tongue-and-groove system that existing structure not reserved anti-floating condition in subway station is implemented in the recent period |
-
2020
- 2020-03-30 CN CN202010238897.7A patent/CN111364511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007138412A (en) * | 2005-11-15 | 2007-06-07 | Shimizu Corp | Girder-slab structure of structure, and extension structure |
| CN209179541U (en) * | 2018-10-26 | 2019-07-30 | 中铁第一勘察设计院集团有限公司 | The tongue-and-groove system that existing structure not reserved anti-floating condition in subway station is implemented in the recent period |
Non-Patent Citations (1)
| Title |
|---|
| 刘昕铭、王佳庆: "地铁车站结构扩建改造顶板接口方案分析", 四川建筑, vol. 38, no. 5, 31 October 2018 (2018-10-31), pages 38 - 41 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112499467A (en) * | 2020-11-24 | 2021-03-16 | 中建八局轨道交通建设有限公司 | Subway station expanded end assembled gantry crane track foundation and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102605965B (en) | Installation and underpinning method of brick-concrete structured isolation bearings | |
| CN112538970A (en) | Local descending plate structure construction method for development floor on vehicle section cover | |
| CN111364511A (en) | Interface structure for subway station and property development and rail transit subway platform | |
| CN105803924A (en) | Simply supported T beam sidewalk combination structure and combination method of mixed passenger and freight railway | |
| CN110761185A (en) | Prestress assembly type track beam for station and construction method thereof | |
| CN212294741U (en) | Interface structure for subway station and property development and rail transit subway platform | |
| CN109440653B (en) | Suitable for the erecting beam construction method and auxiliary shifting beam equipment under special space | |
| CN112879033B (en) | Crossline section tunnel structure combined with shield tunnel | |
| CN111119905A (en) | Reserved support pile structure system for post-construction engineering crossing subway station and construction method thereof | |
| CN114320388A (en) | Underground excavation large-span station reserved tunnel underpass structure and construction method thereof | |
| CN210597375U (en) | Track traffic underground station track panel well with prestressed concrete beam | |
| CN109958443B (en) | Parallel vertical shafts hidden in pipe gallery tunnel and construction method thereof | |
| CN114411817B (en) | Basement roof post-pouring strip local advanced sealing structure and construction method thereof | |
| CN212128877U (en) | Off-line construction and bent cap jacking system for lower structure of temporary bridge of railway | |
| CN220015190U (en) | Assembled rail top wind channel in push pipe tunnel | |
| CN211368390U (en) | A prestressing force assembled track roof beam for station | |
| CN221218476U (en) | Rail bearing layer station bridge transitional connection system for railway station house | |
| CN216841694U (en) | Interim steel stand underpins device | |
| CN216107842U (en) | Frame type sleeper for tunnel inspection well section | |
| CN219430406U (en) | Step-by-step mechanism supports step frame | |
| CN111593861B (en) | Connecting structure of prefabricated rail top air duct and structural slab and construction method thereof | |
| CN215565955U (en) | Bottom supporting structure of tunnel overpass | |
| CN215145979U (en) | Long steel rail welding platform device for subway operation line base | |
| CN211923698U (en) | Elevated station platform layer structure | |
| CN216586573U (en) | Starting section supporting system and prefabricated pipe gallery assembling system |
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 |