CN214938820U - Transition roadbed subgrade of connecting line of subway vehicle section in coastal soft soil area - Google Patents
Transition roadbed subgrade of connecting line of subway vehicle section in coastal soft soil area Download PDFInfo
- Publication number
- CN214938820U CN214938820U CN202120270252.1U CN202120270252U CN214938820U CN 214938820 U CN214938820 U CN 214938820U CN 202120270252 U CN202120270252 U CN 202120270252U CN 214938820 U CN214938820 U CN 214938820U
- Authority
- CN
- China
- Prior art keywords
- transition
- piles
- row
- roadbed
- packing layer
- 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.)
- Expired - Fee Related
Links
- 230000007704 transition Effects 0.000 title claims abstract description 63
- 239000002689 soil Substances 0.000 title claims abstract description 42
- 238000012856 packing Methods 0.000 claims abstract description 75
- 239000004568 cement Substances 0.000 claims abstract description 27
- 230000007423 decrease Effects 0.000 claims abstract description 5
- 239000011372 high-strength concrete Substances 0.000 claims abstract description 5
- 239000004575 stone Substances 0.000 claims description 22
- 239000004567 concrete Substances 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 239000000945 filler Substances 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 81
- 210000001503 joint Anatomy 0.000 description 7
- 239000002344 surface layer Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 241001669679 Eleotris Species 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Landscapes
- Railway Tracks (AREA)
Abstract
The utility model discloses a transition roadbed road bed of connecting wire of subway vehicle section in coastal soft soil area, this transition roadbed road bed includes the soft soil foundation, and soft soil foundation upper berth is equipped with the rubble bed course, is equipped with the transition packing layer on the rubble bed course, is equipped with the boundary slope in the transition packing layer, and boundary slope the place ahead is for the first upper packing layer that comprises A group's filler and the first lower packing layer that comprises B group's filler, and boundary slope the rear is for the second upper packing layer that comprises B group's filler and the second lower packing layer that comprises C group's filler; a gravel foundation is arranged above the transition packing layer; a plurality of rows of pile bodies are arranged in the soft soil foundation, the number of the pile bodies in each row is the same, and the distance between the pile bodies in each row increases progressively from front to back; the pile bodies in the foremost row are all PHC (prestressed high-strength concrete) pipe piles, and the number of the PHC pipe piles in each row of pile bodies is gradually reduced from front to back; the PHC tubular piles reduced in each row of pile bodies are replaced by cement mixing piles; the PHC tubular pile depth in each row of pile bodies decreases progressively from front to back. The roadbed has smooth transition.
Description
Technical Field
The utility model relates to an urban rail transit vehicle section construction technical field among the civil engineering specifically says a transition roadbed road bed of connecting wire of subway vehicle section in coastal soft soil area.
Background
The metro vehicle section comprises a plant area for parking, overhauling, maintaining and preparing metro vehicles and a connecting line for communicating the plant area with a metro main line, and the connecting line is also called an access line. The settlement of soil bodies in coastal soft soil areas often occurs, different settlement control standards are provided for different track structures in subway track traffic management, specifically, the settlement of a plant area track and a subway main line track is strictly controlled, the settlement is required to be not more than 15mm after track construction, so that ballastless tracks are adopted for the plant area and the subway main line, an integral ballast bed roadbed with extremely small settlement and extremely low settlement speed is paved below the tracks, the settlement requirement for a connecting line between the plant area and the main line is not so strict, the settlement is required to be not more than 20cm after track construction, so that a ballast track is adopted for the connecting line of a vehicle section, and a gravel ballast bed roadbed with relatively low cost and relatively large settlement is paved below the tracks.
The integral ballast bed subgrade comprises a soft soil foundation, wherein a plurality of PHC tubular piles are arranged in a rectangular array in the soft soil foundation in a multi-row distribution manner, each row is provided with a plurality of PHC tubular piles, the PHC tubular piles are pressed into the soft soil foundation by a static pressure pile machine, and a pile cap, namely a concrete bearing platform, is poured at the top end of each PHC tubular pile; a broken stone cushion layer with the thickness of 80cm is laid on the soft soil foundation, and three layers of geogrids are embedded in the broken stone cushion layer; a first lower packing layer consisting of B groups of packing is laid on the gravel cushion layer, and a first upper packing layer consisting of A groups of packing is laid on the first lower packing layer; the lower part of the first lower packing layer and the gravel cushion layer form a embankment body of the integral roadbed subgrade, and the upper part of the first lower packing layer forms a roadbed bottom layer of the integral roadbed subgrade; the first upper packing layer forms a surface layer of a foundation bed of the integral roadbed subgrade; concrete foundations are poured on the surface layers of the foundation beds, and the steel rails and the sleepers are placed on the concrete foundations.
The gravel road bed comprises a soft soil foundation, a plurality of cement mixing piles are arranged in the soft soil foundation in a diamond array mode, and the depth of each cement mixing pile is generally about 0.6 of the depth of a PHC (prestressed high concrete) pipe pile of the whole road bed; a broken stone cushion layer with the thickness of 40cm is laid on the soft soil foundation, and a layer of geogrid is embedded in the broken stone cushion layer; a second lower packing layer consisting of C groups of packing is sequentially paved on the gravel cushion layer, and a second upper packing layer consisting of B groups of packing is paved on the second lower packing layer; the lower part of the second lower packing layer and the gravel cushion layer form a embankment body of the gravel bed subgrade, and the upper part of the second lower packing layer forms a foundation bed bottom layer of the gravel bed subgrade; the second upper packing layer forms a foundation bed surface layer of the ballast bed subgrade; the surface layer of the foundation bed is paved with a gravel foundation, and the steel rail and the sleeper are laid on the gravel foundation.
Because the settlement difference between the ballastless track of a factory area or a subway main line and the ballasted track of a connecting line is large, a transition track bed roadbed needs to be laid at the butt joint position of the connecting line and the factory area or the butt joint position of the connecting line and the main line, namely below the butt joint track, and the function of the transition track bed roadbed is to increase the allowed settlement from the whole track bed roadbed to the broken stone track bed roadbed, in other words, the structure and the performance of the transition track bed roadbed need to meet the requirement of transition from the ballastless track to the ballasted track; the transition roadbed structure in the prior art is single, mainly utilizes the structure that reduces the number of PHC tubular piles along length direction, and the transition effect is not smooth and smooth, and the roadbed has the hidden danger of fracture, destruction even.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a transition roadbed of connecting wire of the railcar section in the coastal soft soil area that can smooth transition between whole roadbed and rubble roadbed.
The technical solution of the utility model is to provide a transition roadbed of the connecting line of the subway vehicle section in the coastal soft soil area, the front side of the transition roadbed is butted with the whole roadbed, and the rear side of the transition roadbed is butted with the broken stone roadbed; the transition roadbed comprises a soft soil foundation, a broken stone cushion layer is paved on the soft soil foundation, a transition packing layer is arranged on the broken stone cushion layer, a boundary slope is arranged in the transition packing layer, a first upper packing layer formed by A groups of packing and a first lower packing layer formed by B groups of packing are arranged in front of the boundary slope, and a second upper packing layer formed by B groups of packing and a second lower packing layer formed by C groups of packing are arranged behind the boundary slope; a gravel foundation is arranged above the transition packing layer; the rail composed of the steel rail and the sleeper is laid on the gravel foundation; a plurality of rows of pile bodies are arranged in the soft soil foundation, the number of the pile bodies in each row is the same, and the distance between the pile bodies in each row increases progressively from front to back; the pile bodies in the foremost row are all PHC (prestressed high-strength concrete) pipe piles, and the number of the PHC pipe piles in each row of pile bodies is gradually reduced from front to back; the PHC tubular piles reduced in each row of pile bodies are replaced by cement mixing piles; the PHC tubular pile depth in each row of pile bodies decreases progressively from front to back.
Compared with the prior art, the transition roadbed of the connecting line of the subway vehicle section in the coastal soft soil area with the structure has the following advantages.
The distance between each row of pile bodies of the transition track bed roadbed is gradually increased from front to back, namely the number of the pile bodies in unit area is reduced, the depth of each row of PHC pipe piles is gradually decreased from front to back, namely the supporting performance of a single pile body is weakened, and the number of each row of PHC pipe piles is also gradually decreased from front to back, so that the smooth decrease of the properties such as settlement amount, bearing capacity, strength, hardness and the like of the transition track bed roadbed is realized on three layers, and the smooth transition of a butt joint track between a ballastless track and a ballasted track of a connecting line in a plant area or a subway main line is ensured; avoid the transition ballast bed road bed fracture destruction.
As an improvement, the broken stone cushion layer of the transition ballast bed subgrade is divided into a front area, a middle area and a rear area, the thickness of the front area is 80cm, and three layers of geogrids are embedded in the front area; the thickness of the middle area is 60cm, and two layers of geogrids are embedded in the middle area; the thickness of the rear area is 40cm, and a layer of geogrid is embedded in the rear area; therefore, the broken stone cushion layer of the transition ballast bed roadbed is divided into three areas with gradually decreased thickness and geogrid number from front to back, the strength and bearing capacity of the broken stone cushion layer are gradually decreased, and the transition of the ballast bed between the whole ballast bed roadbed and the broken stone ballast bed roadbed is smoother.
Preferably, the transition ballast bed roadbed has 7 rows of pile bodies, each row has 7 piles, the front two rows are PHC pipe piles, the three rows and the four rows are 4 PHC pipe piles and 3 cement mixing piles, and the PHC pipe piles and the cement mixing piles are arranged at intervals; the five rows and the six rows are provided with 3 PHC tubular piles and 4 cement mixing piles which are arranged at intervals; the seventh row comprises 2 PHC tubular piles and 5 cement mixing piles, and the 2 PHC tubular piles in the row are symmetrically arranged; the arrangement of the pile bodies further ensures smooth decrease of the settlement amount and the bearing capacity of the roadbed of the transition track bed, and further ensures smooth transition of the butt joint track between the ballastless track and the ballasted track.
Drawings
Fig. 1 is the side view structure schematic diagram of the transition ballast bed roadbed of the utility model.
Fig. 2 is a schematic view of the overhead structure of the transition ballast bed subgrade of the present invention.
Fig. 3 is a schematic sectional view along a-a in fig. 2.
Fig. 4 is a schematic sectional view along B-B in fig. 2.
Fig. 5 is a schematic sectional view along the direction C-C in fig. 2.
Shown in the figure are 1, a transition ballast bed roadbed, 2, an integral ballast bed roadbed, 3, a gravel ballast bed roadbed, 4, a soft soil foundation, 5, a gravel cushion layer, 6, a boundary slope, 7, a first upper packing layer, 8, a first lower packing layer, 9, a second upper packing layer, 10, a second lower packing layer, 11, a gravel foundation, 12, a track, 13, a PHC (prestressed high-strength concrete) tubular pile, 14, a cement mixing pile, 15, a geogrid, 16, a pile cap, 17 and a concrete foundation.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
As shown in fig. 1-5, the utility model discloses the transition roadbed of the connecting wire of the railcar section in coastal soft soil area, whole roadbed 2 below the ballastless track of this transition roadbed 1 front side and vehicle section factory or subway main line butt joint rear side and the broken stone roadbed 3 of the broken stone track below the ballasted track of connecting wire butt joint. More generally, one side of a ballasted track of a connecting line of a vehicle section is connected with a slag-free track of a factory area, and the other side of the ballasted track of a main line, so that two sections of butt-joint tracks are arranged on the front side and the rear side of the ballasted track of the connecting line, and two transition track bed roadbeds 1 are laid below the two sections of butt-joint tracks.
For the expression convenience, make whole roadbed 2 in the front, transition roadbed 1 is placed in the middle, and rubble roadbed 3 is behind.
The integral ballast bed subgrade 2 comprises a soft soil foundation 4, a plurality of PHC tubular piles 13 are arranged in a rectangular array in the soft soil foundation 4, namely the PHC tubular piles 13 are arranged in a plurality of rows, each row comprises a plurality of, such as 7, the PHC tubular piles 13 are pressed into the soft soil foundation 4 by a static pressure pile machine, and a pile cap 16, namely a concrete bearing platform, is poured at the top end of each PHC tubular pile 13; a broken stone cushion layer 5 with the thickness of 80cm is paved on a soft soil foundation 4 of the whole roadbed, and three layers of geogrids 15 are embedded in the broken stone cushion layer 5; a first lower packing layer 8 consisting of B groups of packing is laid on the gravel cushion 5, and a first upper packing layer 7 consisting of A groups of packing is laid on the first lower packing layer 8; the lower part of the first lower packing layer 8 and the gravel cushion layer 5 form a embankment body of the integral roadbed subgrade, and the upper part of the first lower packing layer 8 forms a roadbed bottom layer of the integral roadbed subgrade; the first upper filler 7 layers form the surface layer of the foundation bed of the integral roadbed subgrade; the bed is lined with a concrete foundation 17, and a track 12 consisting of rails and sleepers rests on the concrete foundation 17.
The gravel bed subgrade 3 also comprises a soft soil foundation 4, a plurality of cement mixing piles 14 are arranged in a diamond array in the soft soil foundation 4, the depth of each cement mixing pile 14 is generally about half of the depth of a PHC (prestressed high concrete) pipe pile 13 of the whole ballast bed subgrade, and if the depth of the PHC pipe pile 13 of the whole ballast bed subgrade is 25 meters, the depth of the cement mixing pile 14 of the gravel bed subgrade is 13 meters; a 40 cm-thick gravel cushion layer 5 is laid on the soft soil foundation 4, and a layer of geogrid 15 is embedded in the gravel cushion layer 5; a second lower packing layer 10 consisting of C groups of packing is sequentially paved on the gravel cushion layer 5, and a second upper packing layer 9 consisting of B groups of packing is paved on the second lower packing layer 10; the lower part of the second lower packing layer 10 and the gravel cushion layer 5 form a embankment body of the gravel bed subgrade, and the upper part of the second lower packing layer 10 forms a foundation bed bottom layer of the gravel bed subgrade; the second upper packing layer 9 forms the surface layer of the foundation bed of the ballast bed subgrade; the surface layer of the foundation bed is paved with a gravel foundation 11, and a track 12 consisting of steel rails and sleepers is laid on the gravel foundation 11.
The concrete structure of the intermediate transition roadbed 1 is as follows.
The transition track bed roadbed 1 also comprises a soft soil foundation 4, wherein a plurality of rows of pile bodies are arranged in the soft soil foundation 4, the number of the pile bodies in each row is the same, for example, the number of the pile bodies in the transition track bed roadbed 1 is 7, each row is 7, and the distance between the pile bodies in each row increases progressively from front to back; for example, the row pitch of the seven rows of pile bodies is 1.9m, 2.0m, 2.1m, 2.2m, 2.3m and 2.4m in sequence from front to back.
In the soft soil foundation 4 of the transition track bed subgrade 1, the pile bodies in the foremost row are all PHC tubular piles 13, and the number of the PHC tubular piles 13 in each row of the pile bodies is gradually reduced from front to back; the PHC piles 13 reduced in each row of piles are replaced by cement mixing piles 14. In this embodiment, the front two rows are both the PHC tubular piles 13, the three four rows are 4 PHC tubular piles 13 and 3 cement mixing piles 14, and the PHC tubular piles 13 and the cement mixing piles 14 are arranged at intervals; five rows and six rows of the three-dimensional concrete pile are provided with 3 PHC tubular piles 13 and 4 cement mixing piles 14, and the PHC tubular piles 13 and the cement mixing piles 14 are arranged at intervals; the seventh row is provided with 2 PHC tubular piles 13 and 5 cement mixing piles 14, and the 2 PHC tubular piles 13 in the row are symmetrically arranged. The cement mixing piles 14 in the transition track bed subgrade 1 have the same depth as the cement mixing piles 14 in the gravel bed subgrade 3.
In the soft soil foundation 4 of the transition track bed subgrade 1, the depth of the PHC tubular piles 13 in each row of pile bodies is gradually reduced from front to back. The depth of the PHC pile 13 of the first row is the same as that of the PHC pile 13 of the ballast bed 2 as a whole, and is 25 meters, while the depth of the PHC pile 13 of the seventh row is 13 meters as that of the cement mixing pile 14 of the ballast bed 3, and the PHC piles 13 of the 2 to 6 rows are shallower by 2m than the former row.
A broken stone cushion layer 5 is also laid on the soft soil foundation 4, a transition packing layer is arranged on the broken stone cushion layer 5, a boundary slope 6 is arranged in the transition packing layer, a first upper packing layer 7 consisting of A group of packing and a first lower packing layer 8 consisting of B group of packing are arranged in front of the boundary slope 6, and a second upper packing layer 9 consisting of B group of packing and a second lower packing layer 10 consisting of C group of packing are arranged behind the boundary slope 6.
A gravel foundation 11 is arranged above the transition packing layer; a track 12 of rails and sleepers rests on a gravel foundation 11. The broken stone cushion layer 5 of the transition track bed roadbed 1 is divided into a front area, a middle area and a rear area, the thickness of the front area is 80cm, and three layers of geogrids 15 are embedded in the front area; the thickness of the middle area is 60cm, and two layers of geogrids 15 are embedded in the middle area; the thickness of the rear area is 40cm, and a layer of geogrid 15 is embedded in the rear area.
Claims (3)
1. A transition roadbed subgrade of a connecting line of a subway vehicle section in a coastal soft soil area is characterized in that the front side of the transition roadbed subgrade (1) is butted with an integral roadbed subgrade (2), and the rear side of the transition roadbed subgrade is butted with a gravel roadbed subgrade (3); the transition track bed subgrade (1) comprises a soft soil foundation (4), a broken stone cushion layer (5) is paved on the soft soil foundation (4), a transition packing layer is arranged on the broken stone cushion layer (5), a boundary slope (6) is arranged in the transition packing layer, a first upper packing layer (7) consisting of A groups of packing and a first lower packing layer (8) consisting of B groups of packing are arranged in front of the boundary slope (6), and a second upper packing layer (9) consisting of B groups of packing and a second lower packing layer (10) consisting of C groups of packing are arranged behind the boundary slope (6); a gravel foundation (11) is arranged above the transition packing layer; a rail (12) consisting of rails and sleepers is laid on the gravel foundation (11); the method is characterized in that: a plurality of rows of pile bodies are arranged in the soft soil foundation (4), the number of the pile bodies in each row is the same, and the distance between the pile bodies in each row increases progressively from front to back; the pile bodies in the foremost row are all PHC (prestressed high-strength concrete) pipe piles (13), and the number of the PHC pipe piles (13) in each row of pile bodies is gradually reduced from front to back; the PHC tubular piles (13) reduced in each row of pile bodies are replaced by cement mixing piles (14); the depth of the PHC tubular piles (13) in each row of pile bodies decreases progressively from front to back.
2. The transition roadbed for the connection line of the subway vehicle section in the coastal soft soil area according to claim 1, wherein: the broken stone cushion layer (5) of the transition track bed subgrade (1) is divided into a front area, a middle area and a rear area, the thickness of the front area is 80cm, and three layers of geogrids (15) are embedded in the front area; the thickness of the middle area is 60cm, and two layers of geogrids (15) are embedded in the middle area; the thickness of the rear area is 40cm, and a layer of geogrid (15) is embedded in the rear area.
3. The transition roadbed for the connection line of the subway vehicle section in the coastal soft soil area according to claim 1, wherein: the transition track bed roadbed (1) is characterized in that pile bodies are arranged in 7 rows, each row is provided with 7 piles, the front two rows are both PHC tubular piles (13), the three rows and the four rows are provided with 4 PHC tubular piles (13) and 3 cement stirring piles (14), and the PHC tubular piles (13) and the cement stirring piles (14) are arranged at intervals; five rows and six rows of the three-dimensional concrete pile are respectively provided with 3 PHC (prestressed high-strength concrete) pipe piles (13) and 4 cement mixing piles (14), and the PHC pipe piles (13) and the cement mixing piles (14) are arranged at intervals; the seventh row comprises 2 PHC tubular piles (13) and 5 cement mixing piles (14), and the 2 PHC tubular piles (13) in the row are symmetrically arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120270252.1U CN214938820U (en) | 2021-01-29 | 2021-01-29 | Transition roadbed subgrade of connecting line of subway vehicle section in coastal soft soil area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120270252.1U CN214938820U (en) | 2021-01-29 | 2021-01-29 | Transition roadbed subgrade of connecting line of subway vehicle section in coastal soft soil area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214938820U true CN214938820U (en) | 2021-11-30 |
Family
ID=79101102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120270252.1U Expired - Fee Related CN214938820U (en) | 2021-01-29 | 2021-01-29 | Transition roadbed subgrade of connecting line of subway vehicle section in coastal soft soil area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214938820U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404839A (en) * | 2022-08-17 | 2022-11-29 | 山东电力工程咨询院有限公司 | Flexible rigidity-variable circulating water pipe foundation structure and construction method |
-
2021
- 2021-01-29 CN CN202120270252.1U patent/CN214938820U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404839A (en) * | 2022-08-17 | 2022-11-29 | 山东电力工程咨询院有限公司 | Flexible rigidity-variable circulating water pipe foundation structure and construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103321118B (en) | Bridge road transition section roadbed structure of deep layer yielding ground regions | |
| CN103276639B (en) | Roadbed structure for deep soft soil region | |
| CN103334357B (en) | Viaduct road embankment structure with lower pile foundation bearing platform extending in roadbed, and construction method | |
| CN106400636B (en) | A kind of control method of the soft soil roadbed differential settlement of Multi-layer road | |
| CN104746501A (en) | Treatment method and structure of bridge-head foundation sliding settlement | |
| CN104343065A (en) | Bridge track and constructing method thereof | |
| CN203334152U (en) | Bridge road transition section roadbed structure at deep layer yielding ground area | |
| CN215800693U (en) | Disconnect-type road bed ballastless track changeover portion pile slab structure | |
| CN214938820U (en) | Transition roadbed subgrade of connecting line of subway vehicle section in coastal soft soil area | |
| CN206219897U (en) | Medium-and low-speed maglev two-wire excavation location pile foundation combined type support rail beam transition section structure | |
| CN201459525U (en) | Foundation structure at tunnel-to-bridge junction of high-speed railway in loess regions | |
| EP2744942B1 (en) | Railway track support system | |
| CN112176793A (en) | Repairing method for ballastless track settlement | |
| Mekhmonov et al. | Investigation of the period of natural oscillations of the embankment on approaches to bridges | |
| CN214992704U (en) | Transition track bed subgrade of access line of subway vehicle section in coastal soft soil area | |
| CN215976642U (en) | Soft foundation treatment structure for high-water-level deep garbage soil of coastal railway | |
| CN206157485U (en) | Moderate -low speed magnetic levitation single line excavation location pile foundation combined type support rail roof beam transition section structure | |
| CN106283973B (en) | Medium-and low-speed maglev traffic engineering two-wire excavation location independence pier stud type support rail beam transition section structure | |
| CN213804700U (en) | Anti-bumping construction structure on soft soil foundation | |
| CN210458918U (en) | Space stacked bridge structure | |
| CN208219301U (en) | A kind of length mini pile construction weakening expansive soil foundation protuberance | |
| CN206127744U (en) | Moderate -low speed magnetic levitation single line excavation location supporting beam of pile foundation formula support rail roof beam transition section structure | |
| CN107858886B (en) | Viaduct foundation peripheral ground road and construction method thereof | |
| CN106283959B (en) | Medium-and low-speed maglev single line excavation location pile foundation joist type support rail beam transition section structure | |
| CN206127740U (en) | Moderate -low speed magnetic levitation single line location supporting beam of pile foundation formula support rail roof beam transition section structure that fills |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211130 |