CN105735134B - Temporary tensioning method for stub matching prefabricated box girders - Google Patents
Temporary tensioning method for stub matching prefabricated box girders Download PDFInfo
- Publication number
- CN105735134B CN105735134B CN201610152395.6A CN201610152395A CN105735134B CN 105735134 B CN105735134 B CN 105735134B CN 201610152395 A CN201610152395 A CN 201610152395A CN 105735134 B CN105735134 B CN 105735134B
- Authority
- CN
- China
- Prior art keywords
- fitting
- built
- hole
- shearing
- cone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a temporary tensioning method for stub matching prefabricated box girders. The method includes the following steps that firstly, an embedding position of a shearing force cone is reserved on each box girder; secondly, the shearing force cone is inserted in each embedding hole and is attached to and abuts against part of the wall face of each embedding position; and thirdly, through holes where precision rolled thread steel penetrates are formed in the parts, extending out of the embedding holes, of the shearing force cones on the two adjacent box girders, the two ends of the precision rolled thread steel penetrate the through holes in the shearing force cones on the two adjacent box girders and are temporarily tensioned through two centre hole jacks and fastened through two nuts located on the outer sides of the shearing force cones, so that the nuts are tightly attached to the shearing force cones, the centre hole jacks are detached, and the precision rolled thread steel is matched with the nuts to anchor and tension the shearing force cones on the two adjacent box girders. By the adoption of the method, the problems that repair is troublesome due to the fact that through bolt holes are reserved in the prior art, and water is likely to leak in a later period are solved.
Description
Technical field
The present invention relates to bridge box and beam sections short-term matching precast assembly construction field.It is more particularly related to
A kind of short-term matches the interim method for stretching of prefabricated case beam.
Background technology
At present, slug matching is prefabricated relatively broad in ground applications such as U.S., Europe, Japan, Southeast Asia and China Hong Kong, such as fragrant
Port AngChuan Zhou bridge, T9 main lines etc..Apply less in China mainland area, only Su-tong Yangtze River highway bridge, Xiamen collection are U.S. big
Bridge, haunt and plague bridge, Nanjing Si Qiao, the good engineering projects such as bridge, Xia-Zhang Brigde that continue of opening in Shanghai are using the technology.
In beginning a project, box beam needs to first pass through interim prestressing force in erection stage carries out tensioning, then tensioning system is turned
It is changed into permanent prestressing force.Traditional interim prestressing force combines tensioning pair using pre-buried pipeline, steel-tooth bank and fining twisted steel
Draw, i.e., box beam concrete face is fixed on by anchor bolt, anchor bolt need to reserve pipe laying, tensioning in box beam concrete
System is connected with each other by fining twisted steel tensioning by anchor bolt and anti-shear concrete, two steel-tooth banks；Cause roof hole
Hole is more, and anchor bolt construction is loaded down with trivial details, and box beam concrete patch work amount is big, and easily causes top board infiltration, leak.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of interim prestressed construction method, is solved and is passed through due to reserved in the past
Logical bolt hole and cause to repair trouble, and the problem of later stage easy leak.
It is a still further object of the present invention to provide a kind of interim prestressed construction method, accurate positioning, installation and dismounting
Fast, efficiency of construction is greatly improved and cost is reduced.
In order to realize these purposes of the invention and further advantage, there is provided a kind of short-term matches facing for prefabricated case beam
When method for stretching, comprise the following steps：
Step one, the pre-buried position that reserved shearing is bored in box beam, form the box beam its pre-buried position after pouring
Embedded hole, the embedded hole is by from lower for the first up big and down small round platform hole, cylindrical hole and the second up-small and down-big round platform
Hole is constituted, wherein, the less basal diameter of the first round platform bore dia, the diameter of the cylindrical hole and second round platform
The less top surface diameter of bore dia is identical；
Step 2, in the embedded hole insertion shearing cone, it is described shearing cone insertion portion wherein side top
Arc-shaped curved surface first projection consistent with the first round platform hole radian is formed with, with the first projection phase on the shearing cone
To the bottom of side be formed with arc-shaped curved surface second projection consistent with the second round platform hole radian, first projection with
First round platform hole is fitted and is offseted, and second projection is fitted and offseted with second round platform hole；
Shearing cone in step 3, two adjacent box beams stretches out the part of the embedded hole and is provided with and is available for fining twisted steel to pass through
Through hole, the two ends of fining twisted steel are each passed through in two adjacent box beams the through hole for shearing cone, by two centre-hole jacks
Respectively the two ends of the fining twisted steel are carried out with interim tensioning, and institute is fastened respectively with two nuts on the outside of shearing cone
The two ends of fining twisted steel are stated, makes the nut be close to the shearing cone, punching jack described in removal matches somebody with somebody fining twisted steel
Close the shearing cone in the adjacent box beam of screw cap anchoring tensioning two.
Preferably, in the step one, the forming method of the embedded hole is：
Shearing cone built-in fitting is made, the shearing cone built-in fitting is made up of upper built-in fitting and lower built-in fitting, described pre-buried
Part is up big and down small frustum cone structure, and the lower built-in fitting is divided into the structure that cylinder, bottom are divided into truncated cone-shaped for top, described
The upper and bottom section of lower built-in fitting is formed in one；Wherein, the lower built-in fitting is made up of rigid foam；
The pre-buried position of the shearing cone built-in fitting is reserved before box beam concrete is poured, spiral shell is set in the pre-buried position
Rotation stirrup, bores the shearing built-in fitting and is placed in the tie hoop and casting concrete；Remove on described after the completion of pouring
Built-in fitting and the lower built-in fitting, form the embedded hole in the box beam.
Preferably, height of first bump height less than the embedded hole top surface；Second projection is near institute
State the bottom surface of embedded hole.
Preferably, first projection is seamless applying with a part of curved surface of first round platform hole；Described second
Projection is seamless applying with a part of curved surface of second round platform hole.
Preferably, the upper built-in fitting is nylon material.
Preferably, the top of the shearing cone is provided with handle.
Preferably, the upper built-in fitting and the lower built-in fitting contact surface are fixed using tenon structure, and described pre-
Be equipped with screw rod along two kinds of longitudinal directions between embedded part and the lower built-in fitting, the top and bottom of the screw rod respectively by nut with
The upper built-in fitting, the lower built-in fitting are fixed, wherein, what the upper surface and lower surface of the lower built-in fitting passed through positioned at screw rod
Position is provided with annular steel plate washer.
Preferably, the shearing cone is made up of steel.
The present invention at least includes following beneficial effect：
1st, the set aside pre-embedded hole in box beam concrete, shearing cone is put in preformed hole, and shearing is bored and the tight phase of embedded hole
Surrounding concrete shearing resistance is even utilized, then two shearing cones of tensioning are anchored by fining twisted steel；By two Pin that are connected of section assembling
The tight tensioning of beam section is together.The prestress system is installed, removes quick, and efficiency of construction is greatly improved, and without reserving insertion
Bolt hole, it is easy to repair, will not leak；
2nd, during prefabricated box -beam, shearing cone built-in fitting construction pipe construction more pre-buried than steel-tooth bank is simple, embedded part precision
Require to reduce, efficiency of construction is greatly promoted.
3rd, during interim prestressed stretch-draw, shearing cone tears simple, quick open than steel-tooth bank peace, and efficiency of construction is high and can be many
It is secondary to be used in turn, substantially reduce interim measures cost.
The further advantage of the present invention, target and feature embody part by description below, and part will also be by this
The research of invention and practice and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the structural representation that short-term matching prefabricated case beam of the present invention carries out interim tensioning；
Fig. 2 is the present invention under pre-stressed state, the schematic diagram of shearing cone stressing conditions；
Fig. 3 is the structural representation of present invention shearing cone；
Fig. 4 is the structural representation of embedded hole of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail, to make those skilled in the art with reference to description text
Word can be implemented according to this.
It should be noted that experimental technique described in following embodiments, if no special instructions, is conventional method, institute
Reagent and material are stated, if no special instructions, is commercially obtained；In description of the present utility model, term " horizontal ",
" longitudinal direction ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " etc. indicate
Orientation or position relationship be, based on orientation shown in the drawings or position relationship, to be for only for ease of description this utility model and letter
Change description, be not indicate or imply indication device or element must with specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that to restriction of the present utility model.
As Figure 1-4, the present invention provides the interim method for stretching that a kind of short-term matches prefabricated case beam, respectively to needing to open
Two box beams S01# and S02# drawn are followed the steps below：
Step one, in box beam reserve shearing cone 2 pre-buried position, form the box beam its pre-buried position after pouring
Embedded hole 3, the embedded hole 3 is by from lower for the first up big and down small round platform hole, cylindrical hole and the second up-small and down-big circle
Platform hole is constituted, wherein, the less basal diameter of the first round platform bore dia, the diameter of the cylindrical hole and second circle
The less top surface diameter of platform bore dia is identical；
Step 2, in the embedded hole 3 insertion shearing cone 2, it is described shearing cone 2 insertion portion wherein side it is upper
Portion is formed with arc-shaped curved surface first projection 23 consistent with the first round platform hole radian, with described first on the shearing cone 2
The bottom of the relative side of projection 23 is formed with arc-shaped curved surface second projection 24 consistent with the second round platform hole radian, described
First projection 23 is fitted and is offseted with first round platform hole, and second projection 24 is fitted and phase with second round platform hole
Support；
The part that shearing cone 2 on step 3, two adjacent box beams S01# and S02# stretches out the embedded hole 3 is provided with and is available for essence
The through hole that screw-thread steel 4 is passed through is rolled, the two ends of fining twisted steel 4 are each passed through in two adjacent box beams the through hole for shearing cone, by two
Individual centre-hole jack carries out respectively interim tensioning to the two ends of the fining twisted steel 4, and bores the two of 2 outsides with positioned at shearing
Individual nut 5 fastens respectively the two ends of the fining twisted steel 4, makes the nut 5 be close to the shearing cone 2, punching described in removal
Jack, makes fining twisted steel 4 coordinate the shearing cone 2 in the anchoring adjacent box beam of tensioning two of nut 5.
In prior art, need to be respectively provided with pre-buried pipeline, steel-tooth bank and finish rolling in the box beam for carrying out interim tensioning at two
Screw-thread steel 4, steel-tooth bank needs to be fixed by the concrete surface of multiple anchor bolts and box beam, one by one by anchor bolt
Tedious process is fixed, and after later stage interim tensioning terminates, the accessories such as steel-tooth bank, anchor bolt need to be removed, while causing case
Back plate holes are more, and the patch work amount of box beam concrete is big, also easily occur top board infiltration and drainage after reparation, affect
The quality of box beam.
The problem that above-mentioned technical proposal exists according to prior art, devises a kind of facing for short-term matching prefabricated case beam
When method for stretching, penetrate in box beam concrete without the need for a large amount of anchor bolts and be fixed, only need in box beam set aside pre-embedded hole 3,
Later stage easily repairs and antileaking, the hole without the need for reserving anchor bolt, then by being put into the shearing cone 2 supporting with embedded hole 3,
It is pre-buried with correspondence box beam respectively by the first projection 23, the second projection 24 on shearing cone 2 using the shearing resistance of surrounding concrete
First round platform hole in hole 3, the second round platform hole are closely coupled, then by the shearing in fining twisted steel 4 tensioning, two adjacent box beams
Cone 2, realizes connected two Pin beam sections S01# of section assembling together with the tight tensioning of S02#.Shearing cone 2 is put into embedded hole 3
Working procedure construct compared to steel-tooth bank simply many, and need to only position embedded hole 3, steel-tooth bank needs 6 anchor bolts solid
It is fixed, easily move in fixed construction, positioning is difficult, it can thus be appreciated that present invention positioning is more accurate.The peace of shearing cone 2 of the present invention is torn open
Simply, fast, efficiency of construction is greatly improved, and can Reusability, greatly reduce the cost of interim pre-stress construction.
In another kind of technical scheme, in the step one, the forming method of the embedded hole 3 is：
Shearing cone built-in fitting 1 is made, the shearing cone built-in fitting 1 is made up of upper built-in fitting 11 and lower built-in fitting 12, described
Upper built-in fitting 11 is up big and down small frustum cone structure, and the lower built-in fitting 12 is divided into cylinder, bottom and is divided into truncated cone-shaped for top
Structure, the upper and bottom section of the lower built-in fitting 12 is formed in one；Wherein, the lower built-in fitting 12 is rigid foam
Make；
The pre-buried position of the shearing cone built-in fitting 1 is reserved before box beam concrete is poured, is arranged in the pre-buried position
Tie hoop, bores the shearing built-in fitting 1 and is placed in the tie hoop and casting concrete；Remove after the completion of pouring described
Upper built-in fitting 11 and the lower built-in fitting 12, form the embedded hole 3 in the box beam.
In above-mentioned technical proposal, the formation of embedded hole 3 is preferably before box beam concrete is poured, and the shearing cone is pre-
Embedded part 1 is embedded into pre-buried position, and pre-buried position arranges tie hoop to fix to shearing cone built-in fitting 1, realizes embedded hole 3
It is accurately positioned, after concrete setting, only need to extracts built-in fitting 11, with hard tool lower built-in fitting 12 is rooted out, that is, defines pre-
Buried via hole 3, lower built-in fitting 12 is set to rigid foam and solves because the bottom of lower built-in fitting 12 is divided into frustum cone structure, and concrete coagulates
Gu after the problem that cannot extract out, directly root out, while the concrete wall for contacting will not be damaged.Rigid foam cost
Low, easy processing need to only be produced by new lower built-in fitting 12 is fixed again with upper built-in fitting 11 before and reused.
In another kind of technical scheme, the height of the first projection 23 is less than the height of the top surface of the embedded hole 3, and first is convex
Block 23 is less than box beam hole top surface, is because box beam top board matcoveredn thickness, and plain concrete is unable to stress, while in order to prevent
Stress concentration, causes box beam top surface concrete destruction.Bottom surface of second projection 24 higher than the embedded hole 3；Second projection
24 high and reserving hole bottom surfaces, required space during reservation tear down shearing cone.
In another kind of technical scheme, first projection 23 is seamless paste with a part of curved surface of first round platform hole
Close；Second projection 24 is seamless applying with a part of curved surface of second round platform hole.
In another kind of technical scheme, the upper built-in fitting 11 is nylon material.Can Reusability, save interim prestressing force
Construction cost.
In another kind of technical scheme, the top of the shearing cone 2 is provided with handle 21.Shearing cone is extracted during convenient dismounting
2。
In another kind of technical scheme, the upper built-in fitting 11 and the contact surface of lower built-in fitting 12 are solid using tenon structure
It is fixed, and screw rod is equipped with along two kinds of longitudinal directions between the upper built-in fitting 11 and the lower built-in fitting 12, the upper end of the screw rod and
Lower end is fixed respectively by nut with the upper built-in fitting 11, the lower built-in fitting 12, wherein, the upper end of the lower built-in fitting 12
Face and lower surface are provided with annular steel plate washer positioned at the position that screw rod is passed through.Arranging annular steel plate washer prevents bolt to lower built-in fitting
12 destruction, and firmly can not fix with upper built-in fitting 11.
In another kind of technical scheme, the shearing cone 2 is made up of steel.
In above-mentioned technical proposal, the method for dismounting of shearing cone 2 is：First nut removal will be coordinated on fining twisted steel 4, released
Interim prestressing force is put, shearing cone 2 is gently being beaten, is slightly tilted shearing cone 2, you can easily to remove shearing cone 2.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in description and embodiment
With, it can be applied to completely various suitable the field of the invention, for those skilled in the art, can be easily
Other modification is realized, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (8)
1. a kind of short-term matches the interim method for stretching of prefabricated case beam, it is characterised in that comprise the following steps：
Step one, the pre-buried position that reserved shearing is bored in box beam, make the box beam its pre-buried position after pouring form pre-buried
Hole, the embedded hole is by from lower for the first up big and down small round platform hole, cylindrical hole and the second up-small and down-big round platform hole structure
Into, wherein, the less basal diameter of the first round platform bore dia, the diameter of the cylindrical hole and second round platform hole are straight
The less top surface diameter in footpath is identical；
Step 2, in the embedded hole insertion shearing cone, the top of wherein side of the insertion portion of the shearing cone is formed
There is arc-shaped curved surface first projection consistent with the first round platform hole radian, it is relative with first projection on the shearing cone
The bottom of side is formed with arc-shaped curved surface second projection consistent with the second round platform hole radian, first projection with it is described
First round platform hole is fitted and is offseted, and second projection is fitted and offseted with second round platform hole；
Shearing cone in step 3, two adjacent box beams stretches out the part of the embedded hole and is provided be available for fining twisted steel to pass through logical
Hole, the two ends of fining twisted steel are each passed through in two adjacent box beams the through hole for shearing cone, are distinguished by two centre-hole jacks
Interim tensioning is carried out to the two ends of the fining twisted steel, and the essence is fastened respectively with two nuts on the outside of shearing cone
The two ends of screw-thread steel are rolled, makes the nut be close to the shearing cone, punching jack described in removal makes fining twisted steel coordinate spiral shell
Shearing cone in the cap anchoring adjacent box beam of tensioning two.
2. short-term as claimed in claim 1 matches the interim method for stretching of prefabricated case beam, it is characterised in that the step one
In, the forming method of the embedded hole is：
Shearing cone built-in fitting is made, the shearing cone built-in fitting is made up of upper built-in fitting and lower built-in fitting, and the upper built-in fitting is
Up big and down small frustum cone structure, the lower built-in fitting is divided into the structure that cylinder, bottom are divided into truncated cone-shaped for top, described lower pre-
The upper and bottom section of embedded part is formed in one；Wherein, the lower built-in fitting is made up of rigid foam；
The pre-buried position of the shearing cone built-in fitting is reserved before box beam concrete is poured, spiral hoop is set in the pre-buried position
Muscle, bores the shearing built-in fitting and is placed in the tie hoop and casting concrete；Remove after the completion of pouring described pre-buried
Part and the lower built-in fitting, form the embedded hole in the box beam.
3. short-term as claimed in claim 1 matches the interim method for stretching of prefabricated case beam, it is characterised in that first projection
Highly less than the height of the embedded hole top surface；Second projection is near the bottom surface of the embedded hole.
4. short-term as claimed in claim 1 matches the interim method for stretching of prefabricated case beam, it is characterised in that first projection
It is seamless applying with a part of curved surface of first round platform hole；A part of song of second projection and second round platform hole
Face is seamless applying.
5. short-term as claimed in claim 2 matches the interim method for stretching of prefabricated case beam, it is characterised in that the upper built-in fitting
For nylon material.
6. short-term as claimed in claim 1 matches the interim method for stretching of prefabricated case beam, it is characterised in that the shearing cone
Top is provided with handle.
7. short-term as claimed in claim 2 matches the interim method for stretching of prefabricated case beam, it is characterised in that the upper built-in fitting
Fixed using tenon structure with the lower built-in fitting contact surface, and it is vertical along two kinds between the upper built-in fitting and the lower built-in fitting
To screw rod is equipped with, the top and bottom of the screw rod are fixed respectively by nut with the upper built-in fitting, the lower built-in fitting,
Wherein, the upper surface and lower surface of the lower built-in fitting is provided with annular steel plate washer positioned at the position that screw rod is passed through.
8. short-term as claimed in claim 1 matches the interim method for stretching of prefabricated case beam, it is characterised in that the shearing is bored and is
Steel are made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152395.6A CN105735134B (en) | 2016-03-17 | 2016-03-17 | Temporary tensioning method for stub matching prefabricated box girders |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152395.6A CN105735134B (en) | 2016-03-17 | 2016-03-17 | Temporary tensioning method for stub matching prefabricated box girders |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105735134A CN105735134A (en) | 2016-07-06 |
| CN105735134B true CN105735134B (en) | 2017-05-17 |
Family
ID=56251100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610152395.6A Active CN105735134B (en) | 2016-03-17 | 2016-03-17 | Temporary tensioning method for stub matching prefabricated box girders |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105735134B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106835997B (en) * | 2017-03-21 | 2019-02-01 | 中国葛洲坝集团第二工程有限公司 | Steel box-girder lifts interim accurate positioning device and localization method |
| CN107524164A (en) * | 2017-08-30 | 2017-12-29 | 中交第二航务工程局有限公司 | Ultrashort beam pre-stress stretching method |
| CN108677729A (en) * | 2018-06-19 | 2018-10-19 | 中国铁路总公司 | A kind of interim prestressing apparatus for precast segment spliced girder |
| CN113512934B (en) * | 2021-07-08 | 2022-10-21 | 中铁第五勘察设计院集团有限公司 | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090042220A (en) * | 2009-04-09 | 2009-04-29 | (주)대우건설 | Match-casting concrete form and construction method for constructing assembling-type precast pier using thereof |
| CN102733311A (en) * | 2012-07-02 | 2012-10-17 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Line shape control method for short line method segment prefabrication construction |
| CN103215894A (en) * | 2013-04-26 | 2013-07-24 | 中铁第一勘察设计院集团有限公司 | Mobile temporary prestress tension anchor block |
| CN104762883A (en) * | 2015-04-28 | 2015-07-08 | 河海大学 | Matching measurement method used during bridge precasting with stud matching method |
| CN204455862U (en) * | 2015-02-10 | 2015-07-08 | 中交一航局第一工程有限公司 | A kind of steel box-girder seam angle rackwork |
-
2016
- 2016-03-17 CN CN201610152395.6A patent/CN105735134B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090042220A (en) * | 2009-04-09 | 2009-04-29 | (주)대우건설 | Match-casting concrete form and construction method for constructing assembling-type precast pier using thereof |
| CN102733311A (en) * | 2012-07-02 | 2012-10-17 | 中铁大桥局集团武汉桥梁科学研究院有限公司 | Line shape control method for short line method segment prefabrication construction |
| CN103215894A (en) * | 2013-04-26 | 2013-07-24 | 中铁第一勘察设计院集团有限公司 | Mobile temporary prestress tension anchor block |
| CN204455862U (en) * | 2015-02-10 | 2015-07-08 | 中交一航局第一工程有限公司 | A kind of steel box-girder seam angle rackwork |
| CN104762883A (en) * | 2015-04-28 | 2015-07-08 | 河海大学 | Matching measurement method used during bridge precasting with stud matching method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105735134A (en) | 2016-07-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105735134B (en) | Temporary tensioning method for stub matching prefabricated box girders | |
| CN100510280C (en) | Method for the earthwork of a foundation sunk for a wind energy facility | |
| CN207646887U (en) | One kind climbing cone embedded system | |
| CN106460355B (en) | The pedestal of wind turbine | |
| CN203296175U (en) | Rectangular steel pipe column assembly type column foot | |
| CN108505433B (en) | Pier structure and construction method thereof | |
| CN103866761B (en) | The mechanical connection pile crown of end plate recycling precast concrete pile and manufacture method thereof | |
| CN109208790A (en) | Circular arc shear wall single side formwork construction method | |
| CN110468727B (en) | Temporary prestress tensioning pedestal and lifting point integrated structure of segmental beam and construction method | |
| CN113860190B (en) | Cantilever crane turnover-free beam rest bracket and installation method | |
| CN105696796A (en) | Cantilever scaffold steel girder anchoring method | |
| CN105952045B (en) | Floor construction method is poured after a kind of prestressing force | |
| CN203768893U (en) | End plate-reusable mechanical connecting pile head of prefabricated concrete pile | |
| CN103233474B (en) | Pillar construction and comprise the foundation pit support system of this pillar construction | |
| CN212561508U (en) | Take guider's prefabricated prestressed anchorage pole | |
| CN207092104U (en) | A kind of steel-pipe pile attachment structure | |
| CN205134188U (en) | Bury ground tackle deeply | |
| CN113512932B (en) | Prestressed steel beam connected prefabricated small box girder type hidden cover beam and construction method thereof | |
| CN205742249U (en) | A kind of prestressed concrete back cover cushion cap template | |
| CN210529735U (en) | Building steel structure platform base | |
| CN212404845U (en) | Temporary continuous beam pier beam consolidation system and continuous beam bridge | |
| JP2015113563A (en) | Screw pile and burying method thereof | |
| CN207079809U (en) | A kind of assembled steel reinforced Concrete U Vierendeel girder and making mould and connection steelframe | |
| CN111455996A (en) | Prefabricated prestressed anchor rod with guide device and construction method | |
| CN205857229U (en) | A kind of shaped steel suspension column attachment means with prestressed anchor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |