CN110468728A - A kind of precast segment spliced girder hole for hoist plugging structure and its construction method - Google Patents
A kind of precast segment spliced girder hole for hoist plugging structure and its construction method Download PDFInfo
- Publication number
- CN110468728A CN110468728A CN201910841417.3A CN201910841417A CN110468728A CN 110468728 A CN110468728 A CN 110468728A CN 201910841417 A CN201910841417 A CN 201910841417A CN 110468728 A CN110468728 A CN 110468728A
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- Prior art keywords
- hoist
- hole
- concrete
- plugging block
- plugging
- Prior art date
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 239000004567 concrete Substances 0.000 claims abstract description 121
- 239000003822 epoxy resin Substances 0.000 claims description 22
- 229920000647 polyepoxide Polymers 0.000 claims description 22
- 239000003292 glue Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 11
- 230000015271 coagulation Effects 0.000 claims description 7
- 238000005345 coagulation Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000004035 construction material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- -1 be available locally Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- 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)
- Bridges Or Land Bridges (AREA)
Abstract
A kind of precast segment spliced girder hole for hoist plugging structure and its construction method, the structure includes the hole for hoist being arranged on section box girder and the plugging device for being plugged in the hole for hoist, the hole for hoist is in up big and down small truncated cone-shaped through-hole, the plugging device includes concrete plugging block and bar with hooked end, the concrete plugging block is integrally in up big and down small truncated cone-shaped, the taper of the concrete plugging block is consistent with the taper of the hole for hoist to be blocked, the bottom surface of the concrete plugging block is concordant with the bottom of the hole for hoist, the height of the concrete plugging block is lower than the height of the hole for hoist, the outer wall of the concrete plugging block is bonded with the inner wall of the hole for hoist, the bar with hooked end includes linkage section and is located at linkage section lower end and the integrally formed first crotch section of the linkage section, the first crotch section is located at should In concrete plugging block, the linkage section upper end stretches out in the concrete plugging block from the top of the concrete plugging block.
Description
Technical field
The present invention relates to precast segment assembly bridge technology fields, and in particular to a kind of precast segment spliced girder hole for hoist envelope
Bridging structure and its construction method.
Background technique
When segmental precast erection method builds Prestressed Concrete Bridges, need to be arranged on prefabricated subsection hole for hoist, segment
Concrete reaches design age and is transferred to the maintenance of maintenance area and when on-site consolidation, Lifting implements equipment be both needed to using hole for hoist into
Row lifting, segment lifting needs to block hole for hoist after the completion, to guarantee the globality of segment, prevents bridge in operation rank
Section infiltration.
Segment lifting hole is commonly made to cylinder, when hole for hoist blocks, generallys use and will be slightly larger than lifting channel diameter
Bamboo slab rubber below duct, completes concreting closure processing as template by wire rope suspensioning.Although the method is more
Economy, but inconvenience also is brought to duct plugging construction, be mainly reflected in the following aspects: 1) bamboo slab rubber makes, steel wire
Rope binding construction is cumbersome.2) bamboo slab rubber is placed on beam bottom, and since beam body has set up completion at this time, beam bottom bamboo slab rubber is placed more not
Just.3) for bamboo slab rubber by steel wire Suspending fixation, airtightness and stability are poor, are easy to appear in concreting, process of vibrating
Disturbance and spillage.
Also have and duct closure is carried out using rubber plugging block: diameter is first slightly less than to the rubber sprue of lifting channel diameter
It is blocked again with slightly expanded concrete after being hammered with hammering cylinder to hole for hoist bottom position.It adopts this method and carries out closure work
Effect is higher, can solve the deficiencies of cumbersome, airtightness is poor, easy spillage place of constructing in tradition lifting duct blocking technology, but
Also have following shortcoming: 1) rubber plugging block used by is easy aging, there is the risk fallen in operation stage in later period；
2) rubber plugging block color and segment concrete color are inconsistent, influence appearance；3) rubber plugging block needs when site operation
It individually to purchase, cannot gather materials on the spot.4) hole for hoist pore size, which is influenced size by construction error, not exclusively to unify, if rubber
Gap between glue plugging block and hole for hoist is larger, may take off during hole for hoist closure slightly expanded concrete is perfused
It falls or spillage, pollution will cause to the segment set up, influence overall appearance quality.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of precast segment spliced girder hole for hoist plugging structure and its construction
Method operates convenient for duct plugging construction to provide more construction operation space when the closure of duct, greatly improves closure effect
Rate, and presentation quality and later period durability are preferable, can gather materials on the spot, and reduce project cost.Technical scheme is as follows:
As the first aspect of the present invention, a kind of precast segment spliced girder hole for hoist plugging structure, the structure packet are provided
The hole for hoist being arranged on section box girder and the plugging device for being plugged in the hole for hoist are included, the hole for hoist is in up big and down small
Truncated cone-shaped through-hole, the plugging device includes concrete plugging block and bar with hooked end, and the concrete plugging block is integrally in
Up big and down small truncated cone-shaped, the taper of the concrete plugging block is consistent with the taper of the hole for hoist to be blocked, the coagulation
The bottom surface of grave sprue is concordant with the bottom of the hole for hoist, and the height of the concrete plugging block is lower than the height of the hole for hoist
Degree, the outer wall of the concrete plugging block are bonded with the inner wall of the hole for hoist, and the bar with hooked end includes linkage section and position
In linkage section lower end and the integrally formed first crotch section of the linkage section, the bar with hooked end is inserted vertically into the coagulation
In grave sprue, the first crotch section is located in the concrete plugging block, and the linkage section upper end is from the concrete plugging block
Top stretch out in the concrete plugging block.
Further, the upper end of the linkage section is integrally formed with the second bending segment.
Further, section box girder uses same batch coagulation where the hole for hoist that the concrete plugging block is blocked with it
Soil.
Further, the lateral surface of the concrete plugging block is provided with epoxide-resin glue, to seal for fill concrete
Space of the lateral surface and section box girder of sprue between the inner wall at hole for hoist.
Further, it is located in the hole for hoist in concrete plugging block and has poured slightly expanded concrete, the microdilatancy
The top surface of concrete is concordant at the top of hole for hoist.
As a second aspect of the invention, a kind of construction method of precast segment spliced girder hole for hoist plugging structure is provided,
The described method includes:
In prefabricated subsection box beam, it is arranged on section box girder such as above-mentioned any hole for hoist, makes such as above-mentioned
Any plugging device；
Epoxide-resin glue is uniformly smeared in the concrete plugging block lateral surface of plugging device；It is sling using bar with hooked end mixed
Solidifying grave sprue is simultaneously plunged into hole for hoist to be blocked, and clears up the epoxide-resin glue being extruded；
After epoxy resin adhesive curing, slightly expanded concrete is perfused into hole for hoist, is smeared after slightly expanded concrete vibrates
Flat top surface, then concrete plugging block and slightly expanded concrete jointly block hole for hoist.
Further, the method also includes: if the bottom surface of concrete plugging block exceed hole for hoist bottom, use sand
Wheel polishing concrete plugging block, the surface of the bottom surface and section box girder that make concrete plugging block keep smooth.
Further, the vertical range of the distance from top hole for hoist top of bar with hooked end is wanted not less than cover to reinforcement
It asks.
Further, in prefabricated subsection box beam, rear remaining concrete is poured using section box girder and steel bar end makes
Concrete plugging block and bar with hooked end.
Further, before concrete plugging block is tucked into hole for hoist to be blocked, cleaning section box girder is being lifted
The dust and water of inner wall at hole simultaneously keep clean and dry, to guarantee the effect that is bonded and sealed of epoxide-resin glue.
Beneficial effects of the present invention:
1) hole for hoist on section box girder of the invention is up big and down small truncated cone-shaped structure, is mentioned when can block for duct
For more construction operation space, is operated convenient for duct plugging construction, greatly improve closure efficiency.
2) concrete plugging block of the invention is up big and down small truncated cone-shaped structure, and slightly expanded concrete is perfused in its top surface
Afterwards, concrete plugging block the more can press the more tight under the pressure of slightly expanded concrete with segment lifting hole, when construction and later period operation
It will not fall off from hole for hoist in the process；
3) concrete plugging block, bar with hooked end and epoxide-resin glue are that precast segment assembly bridge must use
Construction material, be available locally, concrete plugging block and concrete is with a piece of batch concrete, appearance face when precast segment
Color and uniform quality, epoxide-resin glue sealing and waterproof effect are preferable, and appearance color can be with section box girder color one after solidification
It causes or close, so that presentation quality is preferable after hole for hoist blocks.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic cross-sectional view of section box girder provided in an embodiment of the present invention and hole for hoist；
Fig. 2 is the top view of section box girder provided in an embodiment of the present invention and hole for hoist；
Fig. 3 is that plugging device provided in an embodiment of the present invention blocks the schematic diagram after hole for hoist.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1-3, a kind of precast segment spliced girder hole for hoist plugging structure provided by the invention, the structure include
The hole for hoist 1 being arranged on section box girder 2 and the plugging device for being plugged in the hole for hoist 1, the hole for hoist 1 are under presenting greatly
Small truncated cone-shaped through-hole, center line are vertically arranged, and the plugging device includes concrete plugging block 3 and bar with hooked end 4, institute
It is whole in up big and down small truncated cone-shaped, the taper of the concrete plugging block 3 and the lifting to be blocked to state concrete plugging block 3
The taper in hole 1 is consistent, and the bottom surface of the concrete plugging block 3 is concordant with the bottom of the hole for hoist 1, the concrete plugging block
3 outer wall is bonded with the inner wall of the hole for hoist 1, and the height of the concrete plugging block 3 is lower than the height of the hole for hoist 1,
The bar with hooked end 4 is including linkage section 41 and is located at 41 lower end of linkage section and integrally formed first crotch of the linkage section 41
Section 42, the bar with hooked end 4 is inserted vertically into the concrete plugging block 3, and the first crotch section 42 is located at the coagulation
In grave sprue 3, and the bill of the first crotch section 42 is without departing from the lateral surface of the concrete plugging block 3, i.e. band crotch
Length in 4 Transducers Embedded in Concrete plugging block 3 of reinforcing bar should be less than corresponding position plugging block width, cannot be exposed, the linkage section 41
Upper end stretches out in the concrete plugging block 3 from the top of the concrete plugging block 3.
Different from existing cylindrical hole for hoist 1, hole for hoist 1 of the invention is described in up big and down small truncated cone-shaped through-hole
Concrete plugging block 3 is shape compatible with the hole for hoist 1, i.e., and in up big and down small truncated cone-shaped, the concrete
The minimum diameter of the minimum diameter of the plugging block 3 concrete plugging block 3 equal or described with the minimum diameter of the hole for hoist 1
It is slightly less than the minimum diameter of the hole for hoist 1, so that when concrete plugging block 3 is filled in the hole for hoist 1, the coagulation grave
Sprue 3 can be concordant with the holding of the bottom surface of the hole for hoist 1.
Preferably, the upper end of the linkage section 41 is integrally formed with the second bending segment, by the way that the first crotch section 42 is arranged, from
And making connection of the bar with hooked end 4 with concrete plugging block 3 than stronger, the two not readily disengages from, by the way that the second crotch is arranged
Section 43 can be with convenient for by concrete plugging block 3 described in 4 taking and placing of bar with hooked end, and after the later period pours slightly expanded concrete 6
So that concrete plugging block 3 and slightly expanded concrete 6 are connected securely, the two is less likely to occur to separate and fall off.
Preferably, the 1 place section box girder 2 of hole for hoist that the concrete plugging block 3 is blocked with it is mixed using same batch
Solidifying soil, to keep its strength grade and presentation quality identical as section box girder 2.
Preferably, the lateral surface of the concrete plugging block 3 is provided with epoxide-resin glue 5, to seal for fill concrete
Space of the lateral surface and section box girder 2 of sprue 3 between the inner wall at hole for hoist 1, epoxide-resin glue 5 are needed in segment cantilever
It largely to be smeared in segment, epoxide-resin glue 5 is the common construction material of precast segment assembling construction bridge, materials side
Just.
Preferably, it is located in concrete plugging block 3 in the hole for hoist 1 and has poured slightly expanded concrete 6, the microdilatancy
The top surface of concrete 6 is concordant with 1 top of hole for hoist, by concrete plugging block 3 and slightly expanded concrete 6 jointly by hole for hoist 1
It blocks；By bar with hooked end 4, concrete plugging block 3 and slightly expanded concrete 6 can be made to be connected securely, two
Person is less likely to occur to separate and fall off, and further ensures the quality of closure.
As a second aspect of the invention, a kind of construction method of precast segment spliced girder hole for hoist plugging structure is provided,
The described method includes:
1) in prefabricated subsection box beam 2, on section box girder 2 be arranged as it is above-mentioned it is any as described in hole for hoist 1, make such as
Plugging device described in any of the above-described kind；
2) dust of inner wall of the cleaning section box girder 2 at hole for hoist 1 and water and keep 1 inner wall of hole for hoist clean and dry,
To guarantee the effect that is bonded and sealed of epoxide-resin glue 5；
3) epoxide-resin glue 5 is uniformly smeared in 3 lateral surface of concrete plugging block of plugging device；Pass through bar with hooked end 4
It picks up concrete plugging block 3 and is plunged into hole for hoist 1 to be blocked, clear up the epoxide-resin glue 5 being extruded；Concrete
After plugging block 3 is packed into hole for hoist 1, on same level cross section, the outer diameter of concrete plugging block 3 will be equal to or slightly less than lifting
The diameter of 1 corresponding position of hole；
4) after the solidification of epoxide-resin glue 5, slightly expanded concrete 6 is perfused into hole for hoist 1, shakes to slightly expanded concrete 6
Top surface is smoothed out after smashing, to jointly block hole for hoist 1 by concrete plugging block 3 and slightly expanded concrete 6, by with curved
Hook reinforcing bar 4 can make concrete plugging block 3 and slightly expanded concrete 6 be connected securely, and the two is less likely to occur to separate
With fall off, further ensure the quality of closure.
Wherein, section box girder 2 pours rear remaining concrete and steel bar end production concrete plugging block 3 and bar with hooked end
4 pour rear remaining concrete and steel bar end production using section box girder 2, to make its strength grade and presentation quality and segment
Box beam 2 is identical.
Preferably, the method also includes: if the bottom surface of concrete plugging block 3 exceed 1 bottom of hole for hoist, use sand
Wheel polishing concrete plugging block 3 makes the surface of the bottom surface of concrete plugging block 3 and section box girder 2 keep smooth.
Preferably, the vertical range of 1 top of distance from top hole for hoist of bar with hooked end 4 should be not less than cover to reinforcement
It is required that.
The present invention is blocked using concrete plugging block 3, bar with hooked end 4, epoxide-resin glue 5 and slightly expanded concrete 6
Hole for hoist 1, it is convenient to block, high-quality, and concrete plugging block 3, bar with hooked end 4, epoxide-resin glue 5 are precast segment assembly
The construction material used with bridge, is available locally, and the sealing of epoxide-resin glue 5 and waterproof effect are preferable.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of precast segment spliced girder hole for hoist plugging structure, which is characterized in that the structure includes being arranged in section box girder
On hole for hoist and be plugged in the plugging device of the hole for hoist, the hole for hoist is in up big and down small truncated cone-shaped through-hole, institute
Stating plugging device includes concrete plugging block and bar with hooked end, and the concrete plugging block is integrally in up big and down small rotary table
Shape, the taper of the concrete plugging block is consistent with the taper of the hole for hoist to be blocked, the bottom surface of the concrete plugging block
Concordant with the bottom of the hole for hoist, the height of the concrete plugging block is lower than the height of the hole for hoist, the concrete
The outer wall of plugging block is bonded with the inner wall of the hole for hoist, the bar with hooked end include linkage section and be located at linkage section lower end with
The integrally formed first crotch section of linkage section, the first crotch section are located in the concrete plugging block, the linkage section
Upper end stretches out in the concrete plugging block from the top of the concrete plugging block.
2. precast segment spliced girder hole for hoist plugging structure according to claim 1, which is characterized in that the linkage section
Upper end is integrally formed with the second bending segment.
3. precast segment spliced girder hole for hoist plugging structure according to claim 1, which is characterized in that the coagulation grave
Section box girder uses same batch concrete where the hole for hoist that sprue is blocked with it.
4. precast segment spliced girder hole for hoist plugging structure according to claim 1, which is characterized in that the coagulation grave
The lateral surface of sprue is provided with epoxide-resin glue, with for fill concrete plugging block lateral surface and section box girder in hole for hoist
Space between the inner wall at place.
5. precast segment spliced girder hole for hoist plugging structure according to claim 1, which is characterized in that in the hole for hoist
Slightly expanded concrete is poured in concrete plugging block, the top surface of the slightly expanded concrete is concordant at the top of hole for hoist.
6. a kind of construction method of precast segment spliced girder hole for hoist plugging structure, which is characterized in that the described method includes:
In prefabricated subsection box beam, hole for hoist as described in any one in claim 1-5 is set on section box girder, and production is as weighed
Benefit requires the described in any item plugging devices of 1-5；
Epoxide-resin glue is uniformly smeared in the concrete plugging block lateral surface of plugging device；Concrete is sling using bar with hooked end
Plugging block is simultaneously plunged into hole for hoist to be blocked, and clears up the epoxide-resin glue being extruded；
After epoxy resin adhesive curing, slightly expanded concrete is perfused into hole for hoist, top is smoothed out after slightly expanded concrete vibrates
Face blocks concrete plugging block and slightly expanded concrete by hole for hoist jointly.
7. the construction method of precast segment spliced girder hole for hoist plugging structure according to claim 6, which is characterized in that such as
The bottom surface of fruit concrete plugging block exceeds hole for hoist bottom, then uses grinder buffing concrete plugging block, make concrete plugging block
Bottom surface and section box girder surface keep it is smooth.
8. the construction method of precast segment spliced girder hole for hoist plugging structure according to claim 6, which is characterized in that band
The vertical range of the distance from top hole for hoist top of hooked bar is not less than cover to reinforcement requirement.
9. the construction method of precast segment spliced girder hole for hoist plugging structure according to claim 6, which is characterized in that In
When prefabricated subsection box beam, rear remaining concrete and steel bar end production concrete plugging block are poured using section box girder and with crotch
Reinforcing bar.
10. the construction method of precast segment spliced girder hole for hoist plugging structure according to claim 6, which is characterized in that
Before concrete plugging block is tucked into hole for hoist to be blocked, clear up inner wall of the section box girder at hole for hoist dust and
Water simultaneously keeps clean and dry, to guarantee the effect that is bonded and sealed of epoxide-resin glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841417.3A CN110468728A (en) | 2019-09-06 | 2019-09-06 | A kind of precast segment spliced girder hole for hoist plugging structure and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910841417.3A CN110468728A (en) | 2019-09-06 | 2019-09-06 | A kind of precast segment spliced girder hole for hoist plugging structure and its construction method |
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| Publication Number | Publication Date |
|---|---|
| CN110468728A true CN110468728A (en) | 2019-11-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910841417.3A Pending CN110468728A (en) | 2019-09-06 | 2019-09-06 | A kind of precast segment spliced girder hole for hoist plugging structure and its construction method |
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| CN (1) | CN110468728A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832117A (en) * | 2021-01-05 | 2021-05-25 | 中交路桥建设有限公司 | Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure |
| CN115445879A (en) * | 2022-10-08 | 2022-12-09 | 常州市第一橡塑设备有限公司 | Manufacturing method of high-strength petroleum fracturing pump shell |
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| CN211228129U (en) * | 2019-09-06 | 2020-08-11 | 中铁第四勘察设计院集团有限公司 | Prefabricated roof beam hoist and mount hole block structure of assembling of festival section |
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2019
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|---|---|---|---|---|
| WO2009119516A1 (en) * | 2008-03-26 | 2009-10-01 | 東芝プラントシステム株式会社 | Floor slab penetration structure and method of repairing floor slab penetrating hole |
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| CN207499438U (en) * | 2017-11-29 | 2018-06-15 | 中冶建工集团有限公司 | Membrane module is hung for what unwrapping wire hole blocked |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832117A (en) * | 2021-01-05 | 2021-05-25 | 中交路桥建设有限公司 | Connecting method of prefabricated box girder and transition layer and prefabricated box girder structure |
| CN115445879A (en) * | 2022-10-08 | 2022-12-09 | 常州市第一橡塑设备有限公司 | Manufacturing method of high-strength petroleum fracturing pump shell |
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