CN108301332A - The detachable steel trestle construction method of beret slice - Google Patents
The detachable steel trestle construction method of beret slice Download PDFInfo
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- CN108301332A CN108301332A CN201810314304.3A CN201810314304A CN108301332A CN 108301332 A CN108301332 A CN 108301332A CN 201810314304 A CN201810314304 A CN 201810314304A CN 108301332 A CN108301332 A CN 108301332A
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional bridges
- E01D15/133—Portable or sectional bridges built-up from readily separable standardised sections or elements, e.g. Bailey bridges
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a kind of detachable steel trestle construction methods of beret slice, including：Step a, trestle column pile foundation construction；Step b, one layer of earth excavation；Step c, absolute altitude pilot measurement, steel pipe post processing；Step d, steel main beam is installed；Step e, fixed beret slice is installed；Step f, secondary beam is installed；Step g, installation driving floorings；Step h, anti-skidding reinforcing rod and guard rail are welded；Step i, test run, examination use；Step j, two layers of earth excavation；Step k, it repeats that next layer of trestle is installed；Step l, girt, bridging installation；Step m, test run, examination use again；Step n, maintenance, dismounting.Construction method assembling is removed conveniently, is improved peace and is torn efficiency open；Meanwhile increasing the rate of recovery, waste is reduced, cost is reduced.
Description
Technical field
The present invention relates to building fields, and in particular, to a kind of detachable steel trestle construction method of beret slice.
Background technology
With the today built towards deep high-leveled and difficult multidirectional development, more and more deep basal pit problems influence in basement construction
Construction site, especially earth excavation stage, the construction difficult problem that Earthwork Construction of Deep Foundation progress is crucial how is accelerated.
The earth excavation duration typically constitutes from 1/3 duration in underground construction stage, improves the unearthed efficiency of the earthwork, reduces the earthwork and apply
It is the advantage for reducing underground construction cost between working hour.In order to promote unearthed efficiency, the interim stack of deep-foundation pit engineering conventional design
Bridge is to be unearthed channel to solve the problems, such as earthwork transportation.
Common steel trestle is formed using shaped steel and steel bar concrete precast slab, though using effect is good, there are construction safeties
Period is longer, the not high problem of recoverable rate.
Therefore, urgent need will provide a kind of reduction trestle cost, increase operation rate, and reduce consumption, the beret slice of green energy conservation
Detachable steel trestle construction method.
Invention content
The object of the present invention is to provide a kind of detachable steel trestle construction method of beret slice, construction method assembling is torn open
Efficiency is torn open except peace conveniently, is improved；Meanwhile increasing the rate of recovery, waste is reduced, cost is reduced.
To achieve the goals above, the present invention provides a kind of detachable steel trestle construction methods of beret slice, including：
Step a, trestle column pile foundation construction；
Step b, one layer of earth excavation；
Step c, absolute altitude pilot measurement, steel pipe post processing；
Step d, steel main beam is installed；
Step e, fixed beret slice is installed；
Step f, secondary beam is installed；
Step g, installation driving floorings；
Step h, anti-skidding reinforcing rod and guard rail are welded；
Step i, test run, examination use；
Step j, two layers of earth excavation；
Step k, it repeats that next layer of trestle is installed；
Step l, girt, bridging installation；
Step m, test run, examination use again；
Step n, maintenance, dismounting.
Preferably, step c includes progress steel pipe top absolute altitude pilot measurement, every steel pipe post on the steel pipe post excavated out
It is marked at symmetrical 2 points；The steel pipe post of overlength part is cut off using gas welding, while according to the size of design drawing middle girder
Setting-out is on steel pipe post；Then girder position excision forming groove and reinforcing plate welding are carried out on column, wherein
Groove forming width dimensional discrepancy is less than or equal to 20mm, and depth dimensions deviation is less than or equal to 5mm.
Preferably, it installs, also, installs after shaped steel girder steel chain intermittent weld of the steel main beam in step d by 2 I40a
At Main Girder Welding fix and shaped steel face is on a grade line.
Preferably, in step e, the U-shaped card that is welded into using 10# I-steel connects beret slice and girder, beret slice and shellfish
Longitudinally connected place is connected by screw bolts between thunder piece, and lateral connection every two is connected across one of scissors pull rod of setting, and pull rod connects
Head is bolt.
Preferably, in step f, secondary beam using 18# I-steel form, longitudinal pitch 300mm, with connect beret slice it
Between communication center using U-shaped card connect；Wherein, which is made of the steel plate of 8mm thickness, connect and blocks with secondary beam electric arc spot welding
On beret slice brace top.
Preferably, in step g, driving floorings use the checkered steel plate of 8mm thickness, the connection of checkered steel plate and secondary beam to use
The mode of arc welding is attached fixation；Also, the vertical secondary beam direction of checkered steel plate is laid with, and is reserved between every block of checkered steel plate
The gaps 100mm.
Preferably, in step h, the design of the tread plate of panel uses B25 reinforcing bars, bar spacing 300mm, reinforcing bar and steel plate it
Between connection connected using arc welding, be that 200mm is welded to connect a little at interval of 300-400mm weld lengths；Guard rail is adopted
It is formed with steel pipe combination with 16# I-steel, wherein I-steel height is 1.2m.
Preferably, in step l, girt is diameter 8mm, and the steel pipe of length 273mm, bridging is using I20a.
Preferably, the dismounting sequence in step n is tread plate and panel, guard rail, secondary beam, beret slice, girder, scissors
Support, girt, steel pipe post.
According to above-mentioned technical proposal, the beret slice formula detachable steel Conveyor belt in the present invention adds steel pipe post by bored concrete pile
As support, bridge floor load is directly reached by steel pipe post and is born by supporting course after bored concrete pile；Bridge system is I-shaped gooseneck, Bei Lei
Piece is assemblied to form, and crossbeam is fixed with pile crown and welded；Bridge floor is I-shaped steel joist, checkered steel plate, anti-skidding reinforcing bar composition, is opened in the earthwork
It digs and basement structure construction provides construction channel as firm pontic in the process, ensure mechanical, transport of materials, meet progress
It is required that.Wherein, it is carried using beret slice (frame) structure, reduces member dead weight, improve bearing capacity；Meanwhile assembling, dismounting side
Just, it improves peace and tears efficiency open.Also, panel dead weight can be reduced by making trestle panel using checkered steel plate, improve bearing capacity, installation weldering
Connect simple and efficient, raising construction efficiency；Meanwhile the rate of recovery is increased, waste is reduced, cost is reduced.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is to be used to provide further understanding of the present invention, an and part for constitution instruction, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is beret slice formula steel trestle elevation in the present invention；
Fig. 2 is excavation work surface schematic diagram in the present invention；
Fig. 3 is girder limiting groove schematic diagram in steel pipe post top in the present invention；
Fig. 4 is beret slice and primary-secondary beam connection diagram in the present invention；
Fig. 5 is beret slice and secondary beam connection diagram in the present invention；
Fig. 6 is light plate face of the present invention tread plate setting schematic diagram.
Reference sign
The vertical bridgings of 1- girts 2-
3- steel pipe post 4- bored concrete piles
5- beret slice 6- floorings
7- fender post 8- columns
The shoveling faces 9- 10- ribs
11- reinforcing rib 12- crossbeams
13- longeron 14-U type cards
15- girder 16- secondary beams
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In the present invention, in the absence of explanation to the contrary, the noun of locality that " upper and lower, inside and outside " etc. is included in the term
Only represent orientation of the term under normal service condition, or be those skilled in the art understand that be commonly called as, and be not construed as pair
The limitation of the term.
Referring to Fig. 1, (wherein, 1 is girt, and 2 be vertical bridging, and 3 be steel pipe post, and 4 be bored concrete pile, and 5 be shellfish thunder
Piece, 6 be floorings, and 7 be fender post), the present invention provides a kind of detachable steel trestle construction method of beret slice, including：
Step a, trestle column pile foundation construction；
Step b, one layer of earth excavation；
Step c, absolute altitude pilot measurement, steel pipe post processing；
Step d, steel main beam is installed；
Step e, fixed beret slice is installed；
Step f, secondary beam is installed；
Step g, installation driving floorings；
Step h, anti-skidding reinforcing rod and guard rail are welded；
Step i, test run, examination use；
Step j, two layers of earth excavation；
Step k, it repeats that next layer of trestle is installed；
Step l, girt, bridging installation；
Step m, test run, examination use again；
Step n, maintenance, dismounting.
In trestle column pile foundation construction, the pile foundation pore-forming of trestle column selects corresponding pile foundation to apply according to the pile-type of design
Work machinery carries out pore-forming, and common trestle pile foundation has rotary digging stake, the stake of punching (brill) hole and Driven Piles etc..It should be according to each in pile foundation construction
Class designs pile-type and carries out pile foundation construction quality control, it is ensured that pile foundation construction quality.
The trestle steel pipe post in wherein pile foundation construction stage is pre-buried should to meet design requirement into pile body length, and in pile foundation
Work progress ensures that steel pipe post is non-rising, does not sink, do not tilt, not deviating, while pile foundation tolerance should meet each pile foundation
It constructs corresponding specification prescribed requirement.
In earth excavation, to provide trestle construction working face, advanced excavation trestle construction is carried out generally in earth excavation
Working face.Excavating sideline and deep-controlled should be carried out during earth excavation, and rational slope system is selected according to soil layer
Number allows the principle of section construction, earth excavation range and depth that can also require to be closed according to section construction according to trestle
The earth excavation depth of the construction arrangement of reason, advanced excavation preferably controls in 3m, and whens conditions permits such as special geology can then fit
Work as adjustment.
(wherein, 8 be column, and 9 be shoveling face, and h1 is shoveling face to capital maximum height, generally no greater than as shown in Figure 2
2m, h2 are shoveling face to capital minimum constructive height, typically no less than 50cm), in addition to ensureing earth excavation safety, answered in digging process
Pay attention to that steel pipe post is protected by machinery not hindered, while the requirement of column construction surface should be excavated out.Common trestle design grade is 8%
~12%, it should be excavated according to the gradient in earth excavation, control cutting depth, rational trestle steel pipe post construction is provided
Work surface.
In absolute altitude pilot measurement, steel pipe post processing, according to design drawing, steel pipe is carried out on the steel pipe post excavated out
The high pilot measurement of top mark, relief are answered eye-catching, should there is on every steel pipe post at symmetrical 2 points.Surplus length portion steel splitting tube column preferably uses gas
Weldering excision, while according to the size setting-out of design drawing middle girder on steel pipe post, after carry out girder position on column again and cut
Cut shaping groove and reinforcing plate welding.(wherein, 10 be ribs to common groove size and reinforcing plate, and 11 be to add as shown in Figure 3
Strengthening tendons, 12 be crossbeam, and 13 be longeron).
Wherein, groove forming width dimensional discrepancy is not preferably greater than 20mm, and depth dimensions deviation should not exceed 5mm.Groove is put
It can be cut after bracing wire and tape measure review should be used before sample gas welding cutting.To ensure the level after steel main beam installation and mark
Height, often arranging column top groove bottom absolute altitude after molding should be consistent.
When installing steel main beam, common steel main beam specification is 2 I50a, due to using beret slice (frame) formula steel trestle
Weight reduction is more, it is common steel main beam specification be adjusted to that 2 I40a are arranged side by side, and two shaped steel girder steels need to be welded first connect together after
Installation.The girder that installation is complete should be welded and fixed securely, and shaped steel face should be on a grade line.
When the fixed beret slice of installation, U-typed card that beret slice is welded into using 10# I-steel connects beret slice and girder,
Fig. 4 is shown in its connection (wherein, 5 be beret slice, and 8 be column, and 14 be U-shaped card, and 15 be girder).It is longitudinal between beret slice and beret slice
Junction is connected by screw bolts, and lateral connection every two is connected across one of scissors pull rod of setting, and pull rod jointing is bolt.
When installing secondary beam, secondary beam is using 18# I-steel composition, longitudinal pitch 300mm, and connect contacting between beret slice
Point still uses U-typed card, the U-typed card to be made using the steel plate of 8mm thickness, and U-typed card is connect with secondary beam electric arc spot welding, card
On beret slice brace top, secondary beam is prevented to move.It is specifically shown in Fig. 5 (wherein, 5 be beret slice, and 14 be U-shaped card, and 16 be secondary beam).
When installation driving floorings, as shown in fig. 6, driving floorings use the checkered steel plate of 8mm thickness, checkered steel plate with it is secondary
The connection of beam is attached fixation by the way of arc welding.The vertical secondary beam direction of checkered steel plate is laid with, every block of checkered steel plate it
Between reserve the gaps 100mm with carry out cleaning bridge floor rubbish.Panel is unable to warpage after installation is complete, deformation.
When welding anti-skidding reinforcing rod and guard rail, the tread plate of panel, which designs, uses B25 reinforcing bars, bar spacing 300mm,
Connection between reinforcing bar and steel plate is connected using arc welding, is being welded to connect for 200mm at interval of 300~400mm weld lengths
Point.Tread plate setting is shown in that Fig. 6, guard rail use 16# I-steel and 48 × 3.5 steel pipe combination to form, I-steel height
1.2m。
Entire trestle should carry out the welding matter that trial run and run detects each tie point quality of connection, weld seam first after being completed
Amount, it is ensured that work progress is safe to use.Test run is according to the ultimate load of design come tissue test run.Test run is since empty wagons to two
Full vehicle operation, number of run is not less than 10 rounds to the instruction carriage of each test run back and forth, and to the settlement observation point of commissioning process
It is observed, each connection point mass is carried out verify comprehensively after, participating in carrying out an acceptance inspection after each side's signature confirms begins to use.
Test run be examine trestle bearing capacity, safety one of most important step, forbid not carry out test run monitoring to start to put into make
With.
When girt, bridging installation, according to design drawing, steel should be set in time when earth excavation to enough depth
After the completion of girt between tube column ensures the globality of trestle bottom, while the vertical bridging position designed is excavated
Welding setting in time, to meet the stability of trestle bottom.Girt is typically designed the steel pipe using 273 × 8.0mm of diameter,
Bridging uses I20a.
The sedimentation that trestle copes with trestle during earth excavation use is monitored, and is connected to tread plate, trestle panel
Point, guard rail etc. carry out current check, the U-shaped card being connected and fixed with girder, secondary beam to beret slice observes, and have and fall off
The timely repair welding in position.It carries out once safety inspection within every 3~5 days, trestle is safeguarded in time.
Trestle requires tissue dismounting in time, dismounting sequence after the completion of earth excavation according to project later stage application plan scheme
Generally tread plate and panel, guard rail, secondary beam, beret slice, girder, bridging, girt, steel pipe post.
Through the above technical solutions, the beret slice formula detachable steel Conveyor belt adds steel pipe post as branch by bored concrete pile
Support, bridge floor load are directly reached by steel pipe post and are born by supporting course after bored concrete pile；Bridge system is I-shaped gooseneck, beret slice assembly
Composition, crossbeam are fixed with pile crown and are welded；Bridge floor is I-shaped steel joist, checkered steel plate, anti-skidding reinforcing bar composition, in earth excavation and ground
Construction channel is provided as firm pontic in lower cell structure work progress, ensures machinery, transport of materials, meets schedule requirement.
Wherein, it is carried using beret slice (frame) structure, reduces member dead weight, improve bearing capacity；Meanwhile assembling, dismounting are conveniently, carry
Gao An tears efficiency open.Also, panel dead weight can be reduced by making trestle panel using checkered steel plate, improve bearing capacity, erecting and welding letter
Just quick, improve construction efficiency；Meanwhile the rate of recovery is increased, waste is reduced, cost is reduced.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical scheme of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. a kind of detachable steel trestle construction method of beret slice, which is characterized in that including：
Step a, trestle column pile foundation construction；
Step b, one layer of earth excavation；
Step c, absolute altitude pilot measurement, steel pipe post processing；
Step d, steel main beam is installed；
Step e, fixed beret slice is installed；
Step f, secondary beam is installed；
Step g, installation driving floorings；
Step h, anti-skidding reinforcing rod and guard rail are welded；
Step i, test run, examination use；
Step j, two layers of earth excavation；
Step k, it repeats that next layer of trestle is installed；
Step l, girt, bridging installation；
Step m, test run, examination use again；
Step n, maintenance, dismounting.
2. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that step c is included in
Steel pipe top absolute altitude pilot measurement is carried out on the steel pipe post excavated out, every steel pipe post is marked at symmetrical 2 points；Overlength part
Steel pipe post cut off using gas welding, while according to the size setting-out of design drawing middle girder on steel pipe post；Then vertical
Girder position excision forming groove and reinforcing plate welding are carried out on column, wherein
Groove forming width dimensional discrepancy is less than or equal to 20mm, and depth dimensions deviation is less than or equal to 5mm.
3. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that the type in step d
Steel girder is installed after the shaped steel girder steel chain intermittent weld by 2 I40a, also, the Main Girder Welding that installation is complete is fixed and shaped steel face exists
On one grade line.
4. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that in step e, use
The U-shaped card that 10# I-steel is welded into connects beret slice and girder, and longitudinally connected place is connected using bolt between beret slice and beret slice
It connects, lateral connection every two is connected across one of scissors pull rod of setting, and pull rod jointing is bolt.
5. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that in step f, secondary beam
It is formed using 18# I-steel, longitudinal pitch 300mm, is connected using U-shaped card with the communication center connecting between beret slice；Its
In, which is made of the steel plate of 8mm thickness, is connect with secondary beam electric arc spot welding and is stuck in beret slice brace top.
6. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that in step g, driving
Floorings use the checkered steel plate of 8mm thickness, the connection of checkered steel plate and secondary beam to be attached fixation by the way of arc welding；And
And the vertical secondary beam direction of checkered steel plate is laid with, and the gaps 100mm are reserved between every block of checkered steel plate.
7. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that in step h, panel
Tread plate design use B25 reinforcing bars, bar spacing 300mm, connection between reinforcing bar and steel plate is using arc welding connection, every
Every 300-400mm weld lengths being welded to connect a little for 200mm；Guard rail is formed using 16# I-steel with steel pipe combination,
Middle I-steel height is 1.2m.
8. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that horizontal in step l
Pull rod is diameter 8mm, and the steel pipe of length 273mm, bridging is using I20a.
9. the detachable steel trestle construction method of beret slice according to claim 1, which is characterized in that tearing open in step n
Except sequence is tread plate and panel, guard rail, secondary beam, beret slice, girder, bridging, girt, steel pipe post.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810314304.3A CN108301332A (en) | 2018-04-10 | 2018-04-10 | The detachable steel trestle construction method of beret slice |
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| CN201810314304.3A CN108301332A (en) | 2018-04-10 | 2018-04-10 | The detachable steel trestle construction method of beret slice |
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| CN109322240A (en) * | 2018-11-06 | 2019-02-12 | 青海送变电工程有限公司 | A kind of extension type channel trestle |
| CN113152247A (en) * | 2021-05-06 | 2021-07-23 | 中交第二航务工程局有限公司 | Steel trestle for assisting in entering cave of mountain tunnel and installation method |
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| CN114856248A (en) * | 2022-06-07 | 2022-08-05 | 中建八局第三建设有限公司 | Corridor type safety channel applied to sloping type deep foundation pit and construction method |
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| CN113622251A (en) * | 2021-08-03 | 2021-11-09 | 深圳宏业基岩土科技股份有限公司 | Recyclable friction plate for trestle and ramp |
| CN113622251B (en) * | 2021-08-03 | 2022-08-09 | 深圳宏业基岩土科技股份有限公司 | Recyclable friction plate for trestle and ramp |
| CN113789714A (en) * | 2021-09-17 | 2021-12-14 | 北京市第三建筑工程有限公司 | Concrete trestle and foundation pit connecting structure |
| CN114856248A (en) * | 2022-06-07 | 2022-08-05 | 中建八局第三建设有限公司 | Corridor type safety channel applied to sloping type deep foundation pit and construction method |
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Application publication date: 20180720 |