CN105401595A - Urban underground comprehensive steel pipe gallery - Google Patents
Urban underground comprehensive steel pipe gallery Download PDFInfo
- Publication number
- CN105401595A CN105401595A CN201510960789.XA CN201510960789A CN105401595A CN 105401595 A CN105401595 A CN 105401595A CN 201510960789 A CN201510960789 A CN 201510960789A CN 105401595 A CN105401595 A CN 105401595A
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- China
- Prior art keywords
- pipe gallery
- sheet bar
- unit sheet
- urban underground
- underground pipe
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Classifications
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- 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
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- 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
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/12—Geometrical or physical properties corrugated
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2200/00—Geometrical or physical properties
- E02D2200/16—Shapes
- E02D2200/1628—Shapes rectangular
- E02D2200/1642—Shapes rectangular made from multiple elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
- E02D2300/0032—Steel; Iron in sheet form, i.e. bent or deformed plate-material
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses an urban underground comprehensive steel pipe gallery which comprises box type pipe joints, wherein each box type pipe joint is formed by assembling unit plate sheets, and the box type pipe joints are assembled in the axial direction to form a box type pipe gallery; protrusions are arranged on the outer side and/or the inner side of each unit plate sheet, and openings are formed in the periphery of the cross section of each protrusion. Compared with a circular-section pipe gallery, the box type pipe gallery structure of the urban underground comprehensive steel pipe gallery increases the use ratio and the general net width and net height of the internal clearance, the height of the pipe gallery is significantly reduced under the condition of ensuring the same internal clearance space, and therefore the foundation excavation depth is decreased, and the civil engineering quantity is reduced; the bottom straight surface of the pipe gallery can be directly used as a pedestrian passage or a driving passage, so that the most important and the most difficult re-filling and the degree of compaction of a bottom wedge-shaped included angle when the circular-section pipe gallery is re-filled are achieved; the pipe gallery is in a semi-flexible structure, has a good anti-seismic property and good settlement resistant performance, can absorb the trace deformation, and is not easily crazed.
Description
Technical field
The invention discloses a kind of pipeline, particularly relate to a kind of steel Urban Underground pipe gallery.
Background technology
The applicant is devoted to the research of steel work and steel-concrete fabricated structure, application and infrastructure project always.Patent applied for number is 2015106007884 " precast assembly steel reinforced concrete combined type steel pipes and preparation method thereof ", the patent of invention of the patent No. to be 201510598743.8 " precast assembly steel-concrete combined pipelines and preparation method thereof " and the patent No. be 201510600759.8 " steel-concrete combined structure pipelines of band spiral reinforcing ring and preparation method thereof ", in above-mentioned patent, pipeline section is all circular cross-section form, when being applied to Urban Underground pipe gallery with this kind of pipeline section form, there is following shortcoming:
1., piping lane interior bottom portion is arc, is not flat, is unfavorable for that bottom arranges pipe support and pipeline, is not easy to the current of maintenance personal and maintenance of equipment, needs to build dedicated platform in piping lane interior bottom portion;
2., piping lane both sides metope is also arc, needs the binding face of load-bearing pipe support and wall also to make same circle of curvature arcuation, increases processing and manufacturing difficulty, is unfavorable for that pipe support and pipeline arrangement are arranged;
3., for monolithic circular cross-section pipeline, there is transport difficult, caliber is greater than 3.5 meters and transfinite;
4., for split blade type circular cross-section also exist transport unfavorable, because its plate is arcuate structure, when lamination transports, in lamination higher plate transportation, the stressed superposition of plate is more, easily cause plate to estimate arc deforming, be transported to scene time serious and cannot dock assembled, need do over again;
5., circular arc plate opposing straight plate, the machining control difficulty such as its circular arc degree, arc length are large, and processing cost is high;
6., rectangular duct cross section can by simply changing aspect ratio, to adapt to different floor height requirements;
7., opposing circular cross section pipe, rectangular-section pipeline difficulty of construction is little;
8., the flexibility of difficult arc unit sheet bar is larger than straight unit sheet bar;
9., foregoing invention patent all applies pipeclay jointly by stress effect, this principle needs pipeline and surrounding soil cooperative transformation to realize, but for Urban Underground pipe gallery, the distortion of pipeline can cause distortion or the destruction of the inner pipe support of piping lane and pipeline, and this is unallowed absolutely in city integrated piping lane;
10., the more important thing is according to firmly building ministerial standard " city integrated piping lane engineering legislation " standard in 2015, circular piping lane is low relative to its space availability ratio of box-shaped piping lane, circular piping lane only uses the headroom connecing rectangle in circular piping lane, namely this reason, the height of circular piping lane will be higher than box-shaped piping lane, need buried darker, add cutting depth and the engineering quantity on basis.
At present, Urban Underground pipe gallery major part is made up of steel concrete, and its form of structure has on-the-spot monobloc cast and precast assembly, cross sectional shape has rectangle and circle shape, but reinforced concrete structure, cost is very high, and whole requirement of engineering uses cement in a large number, be unfavorable for environmental protection, reinforced concrete structure seam is many, generally every 2 ~ 5 meters of seams, and the sealing of seam is a difficult problem, construction technical requirement is high, long construction period.In use be easy to cracking, leak, maintenance cost is high.Rectangle piping lane wherein, its both sides body of wall, except bearing except the load on top, also will bear the transverse load of side soil layer, and the plate at top directly bears dynamic loading and static load, but because only have employed common steel bar concrete technology, in order to resist torque and disturb song, strengthen its supporting capacity, prevent unstability, wall needs the very thick of setting, and expense is high.And common circular steel bar concrete piping lane, bottom piping lane, the backfill quality requirement of key groove and both sides is high.
Therefore, above-mentioned technical barrier urgently to be resolved hurrily.
Summary of the invention
Goal of the invention: the object of this invention is to provide and a kind ofly can improve inner clear space utilization rate, anti-seismic performance is good, anti-settling performance is good steel Urban Underground pipe gallery.
Technical scheme: a kind of steel Urban Underground pipe gallery of the present invention, comprises and form box tube coupling by unit sheet bar is assembled, and this box tube coupling is assembled formation box piping lane vertically; Wherein, there is projection outside and/or the inner side of this unit sheet bar, and the cross-sectional perimeter of this projection has opening.
Wherein, the segment portion cross section on unit sheet bar between adjacent protrusion is arc.
Preferably, box tube coupling is made up of both sides unit sheet bar and upper and lower unit sheet bar; Or be made up of both sides unit sheet bar and upper unit sheet bar.
Wherein, unit sheet bar is made up of metal sheet, and this metal sheet bent upon itself forms projection.
Another kind of steel Urban Underground pipe gallery of the present invention, comprises and forms box tube coupling by unit sheet bar is assembled, and this box tube coupling is assembled formation box piping lane vertically; Wherein, this unit sheet bar is spliced by metal sheet and the shape with opening; Or be spliced side by side by the shape with opening.
Preferably, the cross section of the metal sheet between adjacent described shape is arc.
Wherein, when box tube coupling splices vertically, the contact end portion of adjacent cells plate has flanging, and the contact surface of adjacent folds is splicing joint face.
Preferably, during unit sheet bar assembled formation box tube coupling, connected by a pair junction plate between adjacent cells plate, wherein, the end of each unit sheet bar is equipped with a junction plate, and each junction plate stretches out from the end of unit sheet bar, and extension is as splicing joint face.
Further, the unit sheet bar being positioned at described box piping lane top is arch, and establishes pull bar or truss between the unit sheet bar of its both sides.
Preferably, the assembled formation arranged side by side of box piping lane has the combined type piping lane of two bin or many bins.
Beneficial effect: compared with prior art, the present invention has following remarkable advantage: first the structure of the box piping lane of this steel Urban Underground pipe gallery improves the utilization rate of inner headroom and current clear span and clear height compared with circular cross-section piping lane, and compared with circular cross-section piping lane when ensureing equal inner headroom, the highly significant of piping lane reduces, thus the foundation excavation degree of depth can be reduced, reduce civilwork engineering quantity; Secondly the bottom flat face of this piping lane, can directly as remarkable or cross vehicle passage, and solving most important when circular cross-section piping lane backfills also is the most difficult backfill construction of bottom wedged gap and the problem of degree of compaction; Moreover this piping lane is half flexible structure, anti-seismic performance is good, and anti-settling performance is good, Absorbable rod micro-deformation, and not easy to crack; And special connecting elements can be adopted between adjacent cells plate, be conducive to improving sealing performance and convenient installation; Finally this piping lane is burst assembled structure, and speed of application is fast, the construction period is short, and it is few that single-unit piping lane can reach 15 ~ 25 meters of (as long as traffic condition license, can be longer) piping lane seams, is easy to sealing.
Accompanying drawing explanation
Fig. 1 (a) is the appearance schematic diagram of steel Urban Underground pipe gallery of the present invention;
Fig. 1 (b) is the end view of steel Urban Underground pipe gallery of the present invention;
Fig. 2 (a) is the appearance schematic diagram of invention unit plate;
Fig. 2 (b) is the end view of invention unit plate;
Fig. 3 is invention unit plate welding schematic diagram;
Fig. 4 (a)-4 (d) is the cross sectional representation of first kind projection of the present invention;
Fig. 5 (a)-5 (k) is the cross sectional representation of Equations of The Second Kind projection of the present invention;
Fig. 6 (a)-6 (b) is the cross sectional representation of the present invention the 3rd class projection;
Fig. 7 is a kind of structural representation of invention unit plate;
Fig. 8 (a)-8 (c) is the assembled structural representation with a kind of junction plate of adjacent cells plate of the present invention;
Fig. 9 (a)-9 (c) is the structural representation of junction plate of the present invention;
Figure 10 is the end face structure schematic diagram of the present invention with the unit sheet bar of junction plate;
Figure 11 is the structural representation of the present invention with the unit sheet bar of junction plate;
Figure 12 (a)-12 (b) is for utilizing the structural representation of the another kind of junction plate of the assembled use of invention unit plate;
The cross sectional representation that Figure 13 (a), 13 (b) are box piping lane vault of the present invention;
Figure 14 is the cross sectional representation of the present invention's adjacent box tube coupling splicing construction.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described further.
The first steel Urban Underground pipe gallery 100 of the present invention, comprise and form box tube coupling 102 by unit sheet bar 101 is assembled, this box tube coupling 102 can be made up of both sides unit sheet bar and upper and lower unit sheet bar, also can be made up of both sides unit sheet bar and upper unit sheet bar.Box tube coupling is as shown in figure 11 rectangle, and meanwhile, single-unit piping lane can reach 15 ~ 25 meters, as long as traffic condition license, length can be longer, and whole like this piping lane seam reduces, better tightness; By the box tube coupling 102 assembled formation box piping lane 100 vertically obtained; Wherein, the outside of this unit sheet bar 101 and/or inner side have protruding 103, and the cross-sectional perimeter of this projection 103 has opening.This piping lane is box-structure, and has the projection of open type cross section, and therefore piping lane has certain vertical bearing capacity.Simultaneously, the bottom of box piping lane is flat face, the horizontal stand that do not need to mat formation can directly as remarkable or cross the passage of car, and be easy to build piping lane basis, most importantly it solves the backfill construction of wedged gap and a difficult problem for degree of compaction bottom when piping lane backfills.
Segment portion cross section on this unit sheet bar 101 between adjacent protrusion 103 is arc, makes higher, the anti-vertical unstability ability of the torsional rigidity of unit sheet bar stronger, can improve weldquality to a certain extent simultaneously, reduce stress and concentrate.
Above-mentioned protruding 103 can be located in separately on unit sheet bar 101; Wherein, unit sheet bar is made up of metal sheet, protruding 103 can be formed by this metal sheet bent upon itself, the shape of cross section of bending can be that grooved, arc, semicircle, wave are linear etc., as shown in Fig. 4 (a), 4 (b), 4 (c), 4 (d).
The present invention's another kind of steel Urban Underground pipe gallery 100, comprise and form box tube coupling 102 by unit sheet bar 101 is assembled, this box tube coupling 102 is assembled formation box piping lane 100 vertically; Wherein, this unit sheet bar 101 is spliced, as shown in Fig. 5 (a)-5 (k) by metal sheet 105 and the shape 106 with opening; Or be spliced side by side by the shape 106 with opening, shape 106 comprises C-type steel, channel-section steel, angle steel, i iron, H profile steel, has ringent steel pipe, as shown in Fig. 6 (a), 6 (b).The sheet material that more than straight sheet material can be bent to form with shapes such as arc, ripple type, grooveds can increase the vertical bearing capacity of unit sheet bar.
The cross section of the metal sheet 105 between adjacent metal section bar 106 is arc, makes higher, the anti-vertical unstability ability of the torsional rigidity of unit sheet bar stronger, can improve weldquality to a certain extent simultaneously, reduce stress and concentrate.
When described box tube coupling 102 splices vertically, the contact end portion of adjacent cells plate 101 is bent to form flanging 104, and the contact surface of adjacent folds 104 is splicing joint face, such as, flange bolt can be adopted to connect, as shown in figure 14.Certainly, also adjacent cells plate directly can be welded, as shown in Figure 3.
During said units plate 101 assembled formation box tube coupling 102, connected, as shown in Fig. 8 (a)-8 (c) by a pair junction plate 107 between adjacent cells plate 101.Wherein, the end of each unit sheet bar 101 is equipped with a junction plate 107; And each junction plate 107 stretches out from the end of unit sheet bar 101, extension is as splicing joint face, such as bolt hole 110 can be offered in the extension of a pair junction plate 107, with bolts, as shown in Fig. 9 (a)-9 (c), wherein, splicing joint face shown in Fig. 8 (b) He 8 (c) is horizontal direction, be conducive to boring, all the other illustrated splicing joint faces at an angle to the horizontal direction, so can improve the rigidity of tube coupling in construction and intensity.Utilize above-mentioned junction plate can the end position of levelling both sides unit sheet bar, be conducive to installing and sealing; Junction plate on base unit plate facilitates the centering of both sides unit sheet bar, serves the effect of guiding draw-in groove; Outside box piping lane, bolt connects, convenient installation; While the sealing of adjacent cells sheet contacts face, turn increase the sealing of extension, double seal, improve sealing performance.Certainly, also the contact end portion of adjacent cells plate can be cut into oblique angle, such as 45 degree, then welding etc., as shown in 8 (a).
Preferably, the unit sheet bar at box piping lane top can be straight; Also can be the arch with certain radian, so can utilize concrete-filled steel tubes arch bridge principle, improve the bearing capacity at piping lane top, and between the two ends, bottom of arc-shaped element plate, pull bar 108 or truss 109 are set, to bear the thrust to both sides that arch sheet produces, as shown in Figure 13 (a), 13 (b), so.
Steel Urban Underground pipe gallery of the present invention can be single-cabin structure, as shown in Figure 12 (a), 12 (b), also assembled formation arranged side by side can have the combined type piping lane of two bin or many bins.
The structure of the box piping lane of steel Urban Underground pipe gallery of the present invention improves the utilization rate of inner headroom and current clear span and clear height compared with circular cross-section piping lane, and compared with circular cross-section piping lane when ensureing equal inner headroom, the highly significant of piping lane reduces, thus the foundation excavation degree of depth can be reduced, reduce civilwork engineering quantity; Secondly the bottom flat face of this piping lane, can directly as remarkable or cross vehicle passage, and solving most important when circular cross-section piping lane backfills also is the most difficult backfill construction of bottom wedged gap and the problem of degree of compaction; Moreover this piping lane is half flexible structure, anti-seismic performance is good, and anti-settling performance is good, Absorbable rod micro-deformation, and not easy to crack; And special connecting elements can be adopted between adjacent cells plate, be conducive to improving sealing performance and convenient installation.This steel Urban Underground pipe gallery generally can apply to that underground shares ditch, municipal administration shares piping lane, underground header, supplying drainage, People's Bank of China or vehicle driving passage, underground utilities protection manage.
Claims (10)
1. a steel Urban Underground pipe gallery, it is characterized in that: comprise and form box tube coupling (102) by unit sheet bar (101) is assembled, this box tube coupling (102) is assembled formation box piping lane (100) vertically; Wherein, there is projection (103) outside of this unit sheet bar (101) and/or inner side, and the cross-sectional perimeter of this projection (103) has opening.
2. steel Urban Underground pipe gallery according to claim 1, is characterized in that: the segment portion cross section between the upper adjacent protrusion (103) of described unit sheet bar (101) is arc.
3. steel Urban Underground pipe gallery according to claim 1, is characterized in that: described box tube coupling (102) is made up of both sides unit sheet bar and upper and lower unit sheet bar; Or be made up of both sides unit sheet bar and upper unit sheet bar.
4. steel Urban Underground pipe gallery according to claim 1, is characterized in that: described unit sheet bar is made up of metal sheet, and this metal sheet bent upon itself forms projection (103).
5. a steel Urban Underground pipe gallery, it is characterized in that: comprise and form box tube coupling (102) by unit sheet bar (101) is assembled, this box tube coupling (102) is assembled formation box piping lane (100) vertically; Wherein, this unit sheet bar (101) is spliced by metal sheet (105) and the shape (106) with opening; Or be spliced side by side by the shape (106) with opening.
6. steel Urban Underground pipe gallery according to claim 5, is characterized in that: the cross section of the metal sheet (105) between adjacent described shape (106) is arc.
7. the steel Urban Underground pipe gallery according to claim 1,3 or 5, it is characterized in that: when described box tube coupling (102) is spliced vertically, the contact end portion of adjacent cells plate (101) has flanging (104), and the contact surface of adjacent folds is splicing joint face.
8. steel Urban Underground pipe gallery according to claim 1 or 5, it is characterized in that: time described unit sheet bar (101) assembled formation box tube coupling (102), connected by a pair junction plate (107) between adjacent cells plate (101), wherein, the end of each unit sheet bar (101) is equipped with a junction plate (107), and each junction plate (107) stretches out from the end of unit sheet bar (101), extension is as splicing joint face.
9. steel Urban Underground pipe gallery according to claim 1 or 5, it is characterized in that: the unit sheet bar (101) being positioned at described box piping lane (100) top is arch, and arranges pull bar (108) or truss (109) between the two ends, bottom of arc-shaped element plate.
10. steel Urban Underground pipe gallery according to claim 1 or 5, is characterized in that: the assembled formation arranged side by side of described box piping lane (100) has the combined type piping lane of two bin or many bins.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960789.XA CN105401595A (en) | 2015-12-21 | 2015-12-21 | Urban underground comprehensive steel pipe gallery |
| PCT/CN2016/082938 WO2017107372A1 (en) | 2015-12-21 | 2016-05-22 | Urban underground comprehensive steel pipe gallery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510960789.XA CN105401595A (en) | 2015-12-21 | 2015-12-21 | Urban underground comprehensive steel pipe gallery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105401595A true CN105401595A (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510960789.XA Pending CN105401595A (en) | 2015-12-21 | 2015-12-21 | Urban underground comprehensive steel pipe gallery |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105401595A (en) |
| WO (1) | WO2017107372A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105926674A (en) * | 2016-04-15 | 2016-09-07 | 南京联众建设工程技术有限公司 | High-strength urban underground comprehensive pipe gallery |
| CN105951878A (en) * | 2016-06-29 | 2016-09-21 | 南京联众建设工程技术有限公司 | Steel box-type underground comprehensive pipe gallery provided with arched girder structure |
| CN106193113A (en) * | 2016-08-17 | 2016-12-07 | 成都泽翰科技有限公司 | Underground pipe gallery prefabricated component tapering spring housing cutting ferrule connects assembled device |
| WO2017107372A1 (en) * | 2015-12-21 | 2017-06-29 | 南京联众建设工程技术有限公司 | Urban underground comprehensive steel pipe gallery |
| CN107034916A (en) * | 2017-04-19 | 2017-08-11 | 中国铁道科学研究院铁道建筑研究所 | Glass fibre composite reinforced plastics prefabricated assembly structural |
| CN108978712A (en) * | 2018-08-03 | 2018-12-11 | 上海市机械施工集团有限公司 | Arch top plate precast assembly structure and its construction method |
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| CN105401595A (en) * | 2015-12-21 | 2016-03-16 | 南京联众建设工程技术有限公司 | Urban underground comprehensive steel pipe gallery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017107372A1 (en) * | 2015-12-21 | 2017-06-29 | 南京联众建设工程技术有限公司 | Urban underground comprehensive steel pipe gallery |
| CN105926674A (en) * | 2016-04-15 | 2016-09-07 | 南京联众建设工程技术有限公司 | High-strength urban underground comprehensive pipe gallery |
| CN105926674B (en) * | 2016-04-15 | 2017-07-28 | 南京联众建设工程技术有限公司 | High intensity Urban Underground pipe gallery |
| CN105951878A (en) * | 2016-06-29 | 2016-09-21 | 南京联众建设工程技术有限公司 | Steel box-type underground comprehensive pipe gallery provided with arched girder structure |
| CN106193113A (en) * | 2016-08-17 | 2016-12-07 | 成都泽翰科技有限公司 | Underground pipe gallery prefabricated component tapering spring housing cutting ferrule connects assembled device |
| CN107034916A (en) * | 2017-04-19 | 2017-08-11 | 中国铁道科学研究院铁道建筑研究所 | Glass fibre composite reinforced plastics prefabricated assembly structural |
| CN108978712A (en) * | 2018-08-03 | 2018-12-11 | 上海市机械施工集团有限公司 | Arch top plate precast assembly structure and its construction method |
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| WO2017107372A1 (en) | 2017-06-29 |
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Application publication date: 20160316 |