CN207210935U - Concrete-filled steel tube truss combination beam with replaceable floorings - Google Patents
Concrete-filled steel tube truss combination beam with replaceable floorings Download PDFInfo
- Publication number
- CN207210935U CN207210935U CN201720267087.8U CN201720267087U CN207210935U CN 207210935 U CN207210935 U CN 207210935U CN 201720267087 U CN201720267087 U CN 201720267087U CN 207210935 U CN207210935 U CN 207210935U
- Authority
- CN
- China
- Prior art keywords
- floorings
- anchor
- hole
- connecting plate
- truss
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
It the utility model is related to a kind of concrete-filled steel tube truss combination beam with replaceable floorings, including steel pipe truss, it is characterised in that：Also include suitable bridge to the disconnectable floorings of polylith for being laid on the steel pipe truss top successively；The top of the steel pipe truss has the pipe that winds up, and multigroup connecting plate is fixed with the pipe that winds up, has screw on the connecting plate；The bottom of the floorings be provided with detent one-to-one with multigroup connecting plate and with the one-to-one anchor hole of the screw, the detent and the connecting plate plane contact, the floorings are with the connecting plate by being fixedly connected through the mechanical anchor of the screw and anchor hole；Pass through gear finger anchor connection between two pieces of adjacent floorings.The utility model can be easy to the replacing of floorings in bridge use, shorten construction period, reduction difficulty of construction, can ensure that construction quality and personal security, reduction are required construction site.
Description
Technical field
The utility model belongs to technical field of building construction, is mixed more particularly to a kind of steel pipe with replaceable floorings
Coagulate native truss combination beamss.
Background technology
Concrete-filled steel tube truss combination beam is a kind of novel bridge structure, and being completed this type bridge has dry lake grand bridge
Deng.The deadweight of the type bridge relatively reduces 50% or so with across footpath concrete beam bridge, can also subtract in increase bridge span ability simultaneously
Few bridge substructure quantities, therefore the bridge type has good development prospect.
Space concrete filled steel tube truss combination beamss construction both at home and abroad at present, typically first using dilatory, segmental hoisting the methods of
Steel pipe truss is set up, then the Pumping concrete into wind up pipe and the lower edge steel pipe of steel pipe truss again, treat the concrete in steel pipe
After reaching design requirement, the support using steel pipe truss as cast-in-place floorings template a, high position sets up floorings template, cast-in-site bridge
Panel.Floorings are poured into a mould using the method, model sheetinstallat, concrete cast are in high-altitude completion in situ, and the duration is longer, and construction is difficult
Spend larger, floorings construction quality is not easy to ensure, personal security and architecture quality have very big hidden danger, and change difficulty.
To shorten the duration, ensureing floorings construction quality, floorings can also be poured before steel pipe truss is installed, that is, poured
Build the floorings of completion and steel pipe truss is drawn or lifted together and sets up.During using such a construction method, floorings will increase steel
Construction weight when tubular truss is installed.For bridge pier it is not high, the place of temporary rest pier can be set, can use large tonnage crane be segmented
Steel pipe truss of the lifting with floorings；But when bridge pier is higher or can not set temporary rest pier, using crane segmental hoisting
Method can not then realize, can only use it is dilatory set up, now, heavy weight deck structrue will produce when great cantilever will be caused to work
Raw very big internal force, causes this structural system and construction method not to realize, can only use and first set up steel pipe truss, constructs pour again
Build the construction method of floorings.
In summary, it is necessary to design one kind can widen the steel pipe concrete truss structure place scope of application, shorten the duration,
Ensure the novel mounting structure of work progress personal security and construction quality with.
The content of the invention
The utility model aims to solve the problem that concrete-filled steel tube truss installation period is long in the prior art, is limited sternly by fabricating yard
The technical problem of weight and provide one kind can shorten construction period, reduce difficulty of construction, can ensure construction quality and personal security,
Reduce the concrete-filled steel tube truss combination beam with replaceable floorings required construction site.
The utility model is adopted the technical scheme that to solve technical problem present in known technology：One kind has can
The concrete-filled steel tube truss combination beam of floorings, including steel pipe truss are changed, the top of the steel pipe truss has the pipe that winds up, also
Including along bridge to the disconnectable floorings of polylith for being laid on the steel pipe truss top successively, it is characterised in that：It is described to wind up
Multigroup connecting plate is fixed with pipe, there is screw on the connecting plate；The bottom of the floorings is provided with and multigroup connection
The one-to-one detent of plate and put down with the one-to-one anchor hole of the screw, the detent with the connecting plate
Face contacts, and the floorings are with the connecting plate by being fixedly connected through the mechanical anchor of the screw and anchor hole；It is adjacent
Two pieces of floorings between pass through gear finger anchor connection；The mechanical anchor includes anchor pole, liner plate, pin, stretching
Spring；The upper and lower ends of the anchor pole are respectively provided with threaded portion, and the outer circumference of the anchor pole is evenly equipped with some liner plates, adjacent
Connected between two liner plates by the pin, be provided between the liner plate and the anchor pole and apply the described of radial support power
Tightening spring；It is fitted with the anchor hole of the mechanical anchor and is perfused with polyurethane elastomeric materials；The gear finger bag
Include and stir pin key and handsetting gear, the both sides for stirring pin key are provided with straight-tooth portion, and center is fixed with the handsetting gear
Screw rod；The suitable bridge of the floorings is provided with pin-shifting hole to end face, the corresponding position of the suitable bridges of the floorings to other end
Put and be provided with finger jack, the position that the finger jack is corresponded on the end top surface of the floorings is provided with fixing hole, described
The both sides of pin-shifting hole are provided with poke hole；The pin key of stirring is fitted in the pin-shifting hole, and described dial is equipped with the poke hole
Moving gear, the both sides for stirring pin key are engaged with handsetting gear by tooth；It is fitted with the fixing hole for locking institute
The finger fixing bolt for stirring pin key is stated, envelope is filled out in the poke hole polyurethane elastomeric materials, the center of the handsetting gear
Screw rod top, which is matched somebody with somebody, is stamped pulling hole cover plate and the driving lever nut for locking pulling hole cover plate (11).
The utility model can also use following technical measures：
Multigroup otic placode is welded with along pipe range direction on the pipe that winds up of the steel pipe truss, the connecting plate is welded on the ear
On plate.
Applied in seam between the adjacent floorings and be formed with fluid sealant, the seam top is embedded with the rubber of water-swellable
Adhesive tape.
Buckle closure has an anchor hole cover plate in the anchor hole, and the anchor hole cover plate is by being fitted in the crab-bolt nut lock of the anchor pole
Tightly.
The utility model has the advantages and positive effects of：
In concrete-filled steel tube truss combined beam structure described in the utility model, prefabricated bridge process can be with bridge bottom
Structure, construction process are synchronously carried out, and the pouring construction of follow-up floorings is changed into assembling construction, avoid high-altitude coagulation
Soil pours, operation of vibrating, and can shorten duration, guarantee construction quality and workmen's safety.When floorings are installed, floorings and steel
The connected mode of tubular truss, adjacent floorings and floorings is mechanical anchoring, and this anchorage style both can guarantee that steel and coagulation
Effective combination of soil, has certain deformability again, and faying face shearing can be redistributed by the stiffness variation of connector,
It is avoided that indivedual connector stress are excessive, while prevents steel pipe from stress raisers occur with concrete.Using mechanical anchor formula
Connector, it can also reduce due to steel and temperature effect caused by concrete difference linear expansion coefficient.Because connector is installed
When, does not pour integral with floorings, so ensure that the changeing property of floorings, this is provided just to the health maintenance of bridge
Profit.In summary, the utility model can widen the place scope of application of concrete-filled steel tube truss combination beam, shorten the cycle, ensure
Personal security and construction quality in work progress, there is good realistic meaning.
Brief description of the drawings
Fig. 1 is this combined beam structure cross-sectional view；
Fig. 2 is Fig. 1 side view；
Fig. 3 is Fig. 1 top view；
Fig. 4 is the top view of replaceable floorings；
Fig. 5 is Fig. 4 front view；
Fig. 6 is otic placode and connecting plate front view；
Fig. 7 is Fig. 6 side view；
Fig. 8 is Fig. 6 top view；
Front view when Fig. 9 is mechanical anchor stretching；
Figure 10 is Fig. 9 top view；
Figure 11 is top view when mechanical anchor does not anchor；
Figure 12 is the top view of gear finger；
Figure 13 is Figure 12 front view；
Figure 14 is floorings dismounting schematic diagram.
In figure：1st, steel pipe truss；1-1, wind up pipe；1-2, lower chord tube；1-3, cornical；1-4, upper flat pipe；2nd, floorings；2-
1st, detent；2-2, anchor hole；2-3, pin-shifting hole；2-4, finger jack；2-5, poke hole；2-6, fixing hole；3rd, otic placode；4、
Connecting plate；5th, mechanical anchor；5-1, anchor pole；5-2, tightening spring；5-3, liner plate；5-4, pin；6th, anchor hole cover plate；7th, crab-bolt
Nut；8th, polyurethane elastomeric materials；9th, gear finger；9-1, stir pin key；9-2, handsetting gear；10th, finger fixing bolt；
11st, pulling hole cover plate；12nd, driving lever nut.
Embodiment
For invention, features and effects of the present utility model can be further appreciated that, following examples are hereby enumerated, and coordinate
Accompanying drawing describes in detail as follows：
Refer to Fig. 1-Figure 14, a kind of concrete-filled steel tube truss combination beam with replaceable floorings, including steel pipe purlin
Frame 1.The structure of steel pipe truss 1 as known to building field technical staff, one kind be hinged each other at both ends by steel pipe and
Into structure, the plane or space structure with triangular element being made up of straight-bar, it includes two wind up pipe 1-1, one
Root lower chord tube 1-2, some cornical 1-3 and upper flat pipe 1-4, the pipe 1-1 that winds up is parallel with lower chord tube 1-2, and cornical 1-3 is connected to described
Wind up between pipe 1-1 and lower chord tube 1-2, upper flat pipe 1-4 is connected between the pipe 1-1 that winds up.
The above-mentioned pipe 1-1 and lower chord tube 1-2 that winds up axial direction is bridge to including suitable bridge to being laid on the steel pipe purlin successively
The disconnectable floorings 2 of polylith on frame top.To construct, concreting in advance is prefabricated to be formed floorings 2.Floorings 2 and steel pipe
Connected mode between truss 1 is as follows：
Multigroup connecting plate 4 is fixed with the pipe 1-1 that winds up, there is screw on the connecting plate 4.The floorings 2
Bottom be provided with detent 2-1 one-to-one with multigroup connecting plate 4 and with the one-to-one anchor hole of the screw
2-2, the detent 2-1 and the plane contact of connecting plate 4, the floorings 2 are with the connecting plate 4 by through described
Screw is fixedly connected with anchor hole 2-2 mechanical anchor 5.
In the present embodiment, winding up on pipe 1-1, being welded with multigroup otic placode 3 along pipe range direction for the steel pipe truss 1 is described
Connecting plate 4 is welded on the otic placode 3.The mechanical anchor 5 includes anchor pole 5-1, liner plate 5-3, pin 5-4, tightening spring 5-
2.The upper and lower ends of the anchor pole 5-1 are respectively provided with threaded portion, and the outer circumference of the anchor pole 5-1 is evenly equipped with some liner plate 5-
By the pin 5-4 connections between 3, the adjacent two liner plate 5-3, it is provided with and applies between the liner plate 5-3 and the anchor pole 5-1
Add the tightening spring 5-2 of radial support power.It is fitted with the anchor hole 2-2 of the mechanical anchor 5 and is perfused with poly- ammonia
Ester elastomer material.
Specifically, by the screw center alignment of the anchor hole 2-2 centers of floorings 2 and connecting plate 4, by mechanical anchor 5
Threaded anchor pole 5-1 lower ends screw in the screw of connecting plate 4, pump the pin 5-4 for connecting lining plate 5-3 of mechanical anchor 5,
Tightening spring 5-2 holds out against liner plate 5-3 on the anchor hole 2-2 inwalls of floorings 2, forms mechanical anchor.Then in anchor hole
Polyurethane elastomeric materials 8 are poured into 2-2, cover anchor hole cover plate 6, crab-bolt nut 7 is screwed in anchor pole 5-1 upper ends.
At present, domestic construction equipment and construction technology can ensure the prefabricated precision of floorings 2, the pass of this combining structure
Key is that can floorings 2 and steel pipe truss 1 cooperation.Between enhancing floorings 2 and the pipe 1-1 that winds up of steel pipe truss 1
Be coupled, prevent floorings 2 and relative shear sliding occur between the pipe 1-1 that winds up, except using wind up on pipe 1-1 weld otic placode 3 and
Connecting plate 4, floorings 2 are anchored to together outer, the also embedded bottom recesses 2- of floorings 2 of every piece of connecting plate 4 by mechanical anchor 5
In 1 so that connecting plate 4 and groove 2-1 levels are to holding out against during occurred level displacement.
To ensure to align to adjacent 2 Shear transfers of floorings and convenient installation along bridge, adjacent two pieces of floorings 2
Between pass through the anchor connection of gear finger 9.In the present embodiment, the specific connected mode between adjacent two pieces of floorings 2 is such as
Under：
The gear finger 9 includes stirring pin key 9-1 and handsetting gear 9-2.The both sides for stirring pin key 9-1 are provided with
Straight-tooth portion, center bolt is fixed with the handsetting gear 9-2.The suitable bridge of the floorings 2 is provided with pin-shifting hole to end face
2-3, the suitable bridge of the floorings 2 are provided with finger jack 2-4, the end of the floorings 2 to the correspondence position of other end
Both sides of the position provided with fixing hole 2-6, the pin-shifting hole 2-3 that the finger jack 2-4 is corresponded on top surface are provided with poke hole 2-
5.The pin key 9-1 that stirs is fitted in the pin-shifting hole 2-3, and the handsetting gear 9-2, institute are equipped with the poke hole 2-5
State and stir pin key 9-1 both sides and engaged with handsetting gear 9-2 by tooth.It is fitted with the fixing hole 2-6 for locking institute
The finger fixing bolt 10 for stirring pin key 9-1 is stated, filling out envelope in the poke hole 2-5 there are polyurethane elastomeric materials, described to stir tooth
The center bolt top of wheel, which is matched somebody with somebody, is stamped pulling hole cover plate 11 and the driving lever nut 12 for locking pulling hole cover plate.
Specifically, the pin-shifting hole 2-3 of adjacent two pieces of floorings 2 and finger jack 2-4 is alignd, rotated by center bolt
Handsetting gear 9-2 and driving are stirred pin key 9-1 and stretched out from pin-shifting hole 2-3 in insertion finger jack 2-4, and adjacent two pieces are realized with this
The pin joint of floorings 2.Using finger fixing bolt 10 hold out against in insertion finger jack 2-4 stir pin key 9-1 after, use polyurethane
Poke hole 2-5 is filled out envelope by elastomeric material, then is covered with pulling hole cover plate 11, is screwed with driving lever nut 12.Stir pin key 9-1 and finger
Jack 2-4 quantity can carry out adaptability design according to the width of actual floorings 2, when floorings are widened, can suitably increase
Quantity.
To ensure that the adjacent transverse joint of floorings 2 is closely connected, during assembled floorings 2, seam coats between adjacent floorings
Fluid sealant.And it is embedded with the rubber strip of water-swellable on seam top.
The construction method of replaceable floorings concrete-filled steel tube truss combination beam, refer to Fig. 1-14, including following construction
Step：
1st, prefabricated bridge 2 in advance, i.e., the disconnectable prefabricated construction of floorings 2 is completed in precasting yard.
The 2nd, steel pipe truss 1, the concrete perfusion in the pipe 1-1 that winds up, the lower chord tube 1-2 of steel pipe truss 1 are installed on bridge pier.
3rd, after the pipe 1-1 that winds up, lower chord tube 1-2 inner concretes reach design strength, block-by-block lays bridge floor since end of the bridge
Plate 2, and fixed floorings 2 and the vertical anchor connection of concrete-filled steel tube truss with gear finger 9 and finger with mechanical anchor 5
Bolt 10 is by floorings 2 along bridge anchor connection to each other；
4th, after the installation of end of the bridge floorings 2, assembled boatswain chair device completes follow-up bridge on the floorings 2 of installation
The amplifier of panel and anchor connection, until installing whole floorings 2.
The floorings of replaceable floorings concrete-filled steel tube truss combination beam change construction method, refer to Fig. 1-14, bag
Include following construction procedure：
1st, loosen along bridge to finger fixing bolt 10, open pulling hole cover plate 11, reversed by handsetting gear 9-2 and stir pin key
9-1；
2nd, anchor hole cover plate 6 is opened, polyurethane elastomeric materials 8 and tightening spring 5-2 in burn off anchor hole 2-2, mechanical anchor
5 failures, screw out anchor pole 5-1；
3rd, floorings 2 are lifted by crane；
4th, the dismountable floorings 2 of same specification are hung again；
5th, mechanical anchor 5 is put into anchor hole 2-2, anchor pole 5-1 lower ends screw in connecting plate 4, and pine removes the pin of mechanical anchor 5
5-4 completes mechanical anchor, and polyurethane elastomeric materials 8 are poured into anchor hole 2-2, and covers anchor hole 2-2 with anchor hole cover plate 6, revolves
Tight crab-bolt nut 7；
6th, stir in pin key 9-1 insertions finger jack 2-4, fixed with finger fixing bolt 10 and stir pin key 9-1, it is complete
Then cover poke hole 2-5 to anchor connection along bridge into floorings 2 with pulling hole cover plate 11 and screwed with driving lever nut 12.
Claims (4)
1. a kind of concrete-filled steel tube truss combination beam with replaceable floorings, including steel pipe truss (1), the steel pipe truss
(1) top has the pipe (1-1) that winds up, in addition to removable to the polylith for being laid on the steel pipe truss (1) top successively along bridge
The floorings (2) changed, it is characterised in that：
Multigroup connecting plate (4) is fixed with the pipe that winds up (1-1), there is screw on the connecting plate (4)；The floorings
(2) bottom is provided with detent (2-1) one-to-one with multigroup connecting plate (4) and corresponded with the screw
Anchor hole (2-2), the detent (2-1) and the connecting plate (4) plane contact, the floorings (2) and the company
Fishplate bar (4) through the screw with the mechanical anchor (5) of anchor hole (2-2) by being fixedly connected；Two pieces of adjacent bridge floors
Pass through gear finger (9) anchor connection between plate (2)；
The mechanical anchor (5) includes anchor pole (5-1), liner plate (5-3), pin (5-4), tightening spring (5-2)；The anchor pole
The upper and lower ends of (5-1) are respectively provided with threaded portion, and the outer circumference of the anchor pole (5-1) is evenly equipped with some liner plates (5-3), phase
Connected by the pin (5-4) between adjacent two liner plates (5-3), set between the liner plate (5-3) and the anchor pole (5-1)
There is the tightening spring (5-2) for applying radial support power；It is fitted with the anchor hole (2-2) of the mechanical anchor (5)
It is perfused with polyurethane elastomeric materials (8)；
The gear finger (9) includes stirring pin key (9-1) and handsetting gear (9-2), the both sides for stirring pin key (9-1)
Provided with straight-tooth portion, center bolt is fixed with the handsetting gear (9-2)；The suitable bridge of the floorings (2) is to setting on end face
There is pin-shifting hole (2-3), the suitable bridge of the floorings (2) is provided with finger jack (2-4) to the correspondence position of other end, described
The position that the finger jack (2-4) is corresponded on the end top surface of floorings (2) is provided with fixing hole (2-6), the pin-shifting hole (2-
3) both sides are provided with poke hole (2-5)；The pin key (9-1) of stirring is fitted in the pin-shifting hole (2-3), the poke hole
The handsetting gear (9-2) is equipped with (2-5), the both sides for stirring pin key (9-1) are nibbled with handsetting gear (9-2) by tooth
Close；It is fitted with the fixing hole (2-6) for locking the finger fixing bolt (10) for stirring pin key (9-1), described group
Envelope is filled out in dynamic hole (2-5) polyurethane elastomeric materials, and the center bolt top of the handsetting gear (9-2), which is matched somebody with somebody, is stamped pulling hole cover plate
(11) and for locking the driving lever nut (12) of pulling hole cover plate (11).
2. the concrete-filled steel tube truss combination beam according to claim 1 with replaceable floorings, it is characterised in that：Institute
State and be welded with multigroup otic placode (3) along pipe range direction on the pipe that winds up (1-1) of steel pipe truss (1), the connecting plate (4) is welded on institute
State on otic placode (3).
3. the concrete-filled steel tube truss combination beam according to claim 1 with replaceable floorings, it is characterised in that：Phase
Applied in seam between the adjacent floorings (2) and be formed with fluid sealant, the seam top is embedded with the rubber strip of water-swellable.
4. the concrete-filled steel tube truss combination beam according to claim 1 with replaceable floorings, it is characterised in that：Institute
Stating buckle closure in anchor hole (2-2) has an anchor hole cover plate (6), and the anchor hole cover plate (6) is by being fitted in the anchor pole (5-1) crab-bolt
Nut (7) is locked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720267087.8U CN207210935U (en) | 2017-03-17 | 2017-03-17 | Concrete-filled steel tube truss combination beam with replaceable floorings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720267087.8U CN207210935U (en) | 2017-03-17 | 2017-03-17 | Concrete-filled steel tube truss combination beam with replaceable floorings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207210935U true CN207210935U (en) | 2018-04-10 |
Family
ID=61810516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720267087.8U Withdrawn - After Issue CN207210935U (en) | 2017-03-17 | 2017-03-17 | Concrete-filled steel tube truss combination beam with replaceable floorings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207210935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758750A (en) * | 2017-03-17 | 2017-05-31 | 天津城建大学 | Concrete-filled steel tube truss combination beam and construction method with replaceable floorings |
-
2017
- 2017-03-17 CN CN201720267087.8U patent/CN207210935U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758750A (en) * | 2017-03-17 | 2017-05-31 | 天津城建大学 | Concrete-filled steel tube truss combination beam and construction method with replaceable floorings |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105113425A (en) | Novel construction method for efficient fabricated steel-concrete composite beam | |
| CN106436893A (en) | Fully-prefabricated structure and construction method thereof | |
| US11225803B2 (en) | Prestressed bailey beam for reinforcement and construction method therefor | |
| CN203569582U (en) | Connecting structure of concrete pipe pile and bearing platform | |
| CN103590414B (en) | A kind of attachment structure of concrete tubular pile and cushion cap | |
| CN106758750B (en) | Concrete-filled steel tube truss combination beam and construction method with replaceable floorings | |
| CN105350445A (en) | Novel efficient assembly-type reinforced concrete composite beam | |
| CN106088657B (en) | A kind of ruggedized construction and its construction method of rowlock wall body | |
| CN109853362B (en) | Temporary prestressed anchoring segmented prefabricated capping beam and temporary prestress applying method | |
| CN110258789A (en) | A kind of beam-column connection and its construction method that energy consumption rod iron is replaceable | |
| CN108660908A (en) | A kind of prestressed concrete cable-stayed bridge of the beam prefabricated pin-connected panel of tower | |
| CN207003634U (en) | A kind of balcony slab installs node | |
| CN209178793U (en) | A kind of prestressed concrete cable-stayed bridge of the beam prefabricated pin-connected panel of tower | |
| CN207210935U (en) | Concrete-filled steel tube truss combination beam with replaceable floorings | |
| CN108330806A (en) | The steel-that compoiste adhering anchors shear connections knot mixes combined beam structure and production method | |
| CN210395128U (en) | Hollow core plate beam connection structure in bridge widening | |
| CN110656573A (en) | Shear connector for glue-pouring high-strength bolt | |
| CN208396179U (en) | A kind of prefabricated cantilever stair | |
| CN107100322B (en) | Post stretching vertical prestressing cast-in-place concrete rod structure and construction method | |
| CN112853947A (en) | Prestress connecting device of railway prefabricated pier | |
| CN211472129U (en) | Shear connector for glue-pouring high-strength bolt | |
| CN205636524U (en) | A prestressed concrete cross slab for new and old bridge is connected | |
| CN209128886U (en) | A kind of tower beam thrust attachment device for quickly building construction for self-anchored suspension bridge | |
| CN109112967A (en) | Tower beam thrust attachment device and self-anchored suspension bridge quickly build construction method | |
| CN101487268A (en) | Concrete basement structure with/without bonding prestress and its construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180410 Effective date of abandoning: 20180821 |
|
| AV01 | Patent right actively abandoned |