CN109056555A - Pre-pressing bracket construction method - Google Patents
Pre-pressing bracket construction method Download PDFInfo
- Publication number
- CN109056555A CN109056555A CN201810834305.0A CN201810834305A CN109056555A CN 109056555 A CN109056555 A CN 109056555A CN 201810834305 A CN201810834305 A CN 201810834305A CN 109056555 A CN109056555 A CN 109056555A
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- China
- Prior art keywords
- bracket
- ballast
- weight
- construction method
- pressing bracket
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Classifications
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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
- E01D21/10—Cantilevered erection
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses pre-pressing bracket construction methods, comprising: production ballast bag, the arrangement of measuring point, ballast unload weight, bracket adjustment.Pre-pressing bracket construction method in the present invention, by designing reasonable process, the construction efficiency of pre-pressing bracket can be improved, surcharge preloading real-time monitoring is carried out to bracket, it is accurate to calculate bracket absolute altitude, the influence for eliminating ground, bracket itself inelastic deformation is conducive to soffit alignment control, guarantees construction safety, improves Cast-in-situ Beam quality.
Description
Technical field
The present invention relates to construction equipment or other building auxiliary equipment technical fields more particularly to pre-pressing bracket construction parties
Method.
Background technique
In building construction, highway and railroad bridge and civic building engineering, the appurtenant work of many main bodys all uses bracket
Method construction, pre-pressing bracket is an important link in rack construction.How rationally, efficient, safety simulation concrete structure,
Installation quality and integrated carrying ability to checking bracket are of great significance.
Summary of the invention
In the prior art for solution, the skill the defects of step reasonability, high efficiency, safety of the presence of pre-pressing bracket method
Art problem, technical scheme is as follows:
Pre-pressing bracket construction method in the present invention, comprising the following steps:
Step S101 makes ballast bag, using braided bag special sand loading；
Step S102, the arrangement of measuring point after installing bed die on bracket, lay observation point, record in bed die lower surface
Measure the original absolute altitude of observation point；
Step S103, ballast, lifting cooperation are first pressed against at nearly support manually in bed die upper surface pile ballast bag, then according to
Secondary to arrange to the position far from support, stacking sequence, first layer stacks next layer after stacking again, and three-level ballast, which is followed successively by, to be set
75%, 100%, the 120% of beam load weight is counted, after the completion of every grade of load, first stops next stage load, and at interval of 12h pairs
Bracket settling amount is once monitored, and when the settling amount average value of monitoring point 12h is less than 2mm, then carries out next stage load；
Step S104 unloads weight, first unloads weight according to ballast after ballast sequence, the sequence that weight is unloaded after first ballast is unloaded
It carries, and unloading weight process, time interval according to ballast is inversely to carry out, and is measured simultaneously after ballast bag is all unsnatched to observation point
Perform record；
Step S105, bracket adjustment calculate deformation of timbering according to the measurement data recorded in step S103, step S104
Value determines and adjusts bracket absolute altitude in conjunction with designed elevation.
Further, in step S102, the position of monitoring point is located at 1/2 among bed die, is often all provided at 3 points across longitudinal,
Each 1, span centre 1 at support.
Further, further comprising the steps of in step S104:
From third level ballast after 3 days, pre-pressing bracket, which meets one of following requirements, can carry out unloading weight:
First is that each measuring point settling amount average value is less than 1mm；
Second is that continuous measuring point settling amount average value each three times is accumulative to be less than 5mm.
Further, further comprising the steps of in the step S104: disposably to be unloaded when unloading weight, and in bracket two sides pair
Claim, is balanced, synchronous unloading.
Pre-pressing bracket construction method in the present invention, compared with prior art, it has the advantage that:
The construction effect of pre-pressing bracket can be improved by designing reasonable process in pre-pressing bracket construction method in the present invention
Rate carries out surcharge preloading real-time monitoring to bracket, accurate to calculate bracket absolute altitude, eliminates ground, bracket itself inelastic deformation
It influences, is conducive to soffit alignment control, guarantee construction safety, improve Cast-in-situ Beam quality.
Detailed description of the invention
Fig. 1 is the flow diagram of pre-pressing bracket construction method in the present invention；
Fig. 2 is the schematic diagram of ballast sequence of the present invention.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical solution of the present invention is clearly and completely described.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
As shown in Figure 1, the pre-pressing bracket construction method in the present invention, comprising the following steps:
Step S101 makes ballast bag, using braided bag special sand loading；
Step S102, the arrangement of measuring point after installing bed die on bracket, lay observation point, record in bed die lower surface
Measure the original absolute altitude of observation point；
Step S103, ballast, lifting cooperation is manually in bed die upper surface pile ballast bag, as shown in Fig. 2, being first pressed against nearly branch
It at seat, then is successively arranged to the position far from support, stacking sequence, first layer stacks next layer, three-level pressure after stacking again
It is followed successively by 75%, 100%, the 120% of design beam load weight, after the completion of every grade of load again, first stops next stage load, and every
Interval 12h once monitors bracket settling amount, when the settling amount average value of monitoring point 12h is less than 2mm, then carries out next
Grade load；
Step S104 unloads weight, first unloads weight according to ballast after ballast sequence, the sequence that weight is unloaded after first ballast is unloaded
It carries, and unloading weight process, time interval according to ballast is inversely to carry out, and is measured simultaneously after ballast bag is all unsnatched to observation point
Perform record；
Step S105, bracket adjustment calculate deformation of timbering according to the measurement data recorded in step S103, step S104
Value determines and adjusts bracket absolute altitude in conjunction with designed elevation.It is determined according to the deformation of timbering value surveyed above in conjunction with designed elevation
With adjustment bottom elevation: beam bottom mould absolute altitude=design bottom elevation+rack elasticity deformation values.According to showing that data adjust in time
The absolute altitude of beam bottom bracket, template has reached design requirement absolute altitude.
Further, in step S102, the position of monitoring point is located at 1/2 among bed die, is often all provided at 3 points across longitudinal,
Each 1, span centre 1 at support.
Further, further comprising the steps of in step S104:
From third level ballast after 3 days, pre-pressing bracket, which meets one of following requirements, can carry out unloading weight:
First is that each measuring point settling amount average value is less than 1mm；
Second is that continuous measuring point settling amount average value each three times is accumulative to be less than 5mm.
Further, further comprising the steps of in the step S104: disposably to be unloaded when unloading weight, and in bracket two sides pair
Claim, is balanced, synchronous unloading.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (4)
1. pre-pressing bracket construction method, which comprises the following steps:
Step S101 makes ballast bag, using braided bag special sand loading；
Step S102, the arrangement of measuring point after installing bed die on bracket, lay observation point, record measurement in bed die lower surface
The original absolute altitude of observation point；
Step S103, ballast, lifting cooperation manually in bed die upper surface pile ballast bag, be first pressed against at nearly support, then successively to
Position far from support arranges, and stacking sequence, first layer stacks next layer after stacking again, and three-level ballast is followed successively by design beam
75%, 100%, the 120% of load weight after the completion of every grade of load, first stops next stage load, and at interval of 12h to bracket
Settling amount is once monitored, and when the settling amount average value of monitoring point 12h is less than 2mm, then carries out next stage load；
Step S104 unloads weight, first unloads weight according to ballast after ballast sequence, and the sequence that weight is unloaded after first ballast is unloaded, and
It is inversely to carry out that weight process, time interval, which are unloaded, according to ballast, and observation point is measured and performed after ballast bag is all unsnatched
Record；
Step S105, bracket adjustment calculate deformation of timbering value, really according to the measurement data recorded in step S103, step S104
Fixed and adjustment bracket absolute altitude.
2. pre-pressing bracket construction method according to claim 1, which is characterized in that in step S102, the position of monitoring point
It is located at 1/2 among bed die, is often all provided at 3 points across longitudinal, each 1, span centre 1 at support.
3. pre-pressing bracket construction method according to claim 1, which is characterized in that further include following step in step S104
It is rapid:
From third level ballast after 3 days, pre-pressing bracket, which meets one of following requirements, can carry out unloading weight:
First is that each measuring point settling amount average value is less than 1mm；
Second is that continuous measuring point settling amount average value each three times is accumulative to be less than 5mm.
4. pre-pressing bracket construction method according to claim 1, which is characterized in that further include following in the step S104
Step: disposably unloading when unloading weight, and in symmetrical, balanced, the synchronous unloading in bracket two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834305.0A CN109056555A (en) | 2018-07-26 | 2018-07-26 | Pre-pressing bracket construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810834305.0A CN109056555A (en) | 2018-07-26 | 2018-07-26 | Pre-pressing bracket construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109056555A true CN109056555A (en) | 2018-12-21 |
Family
ID=64836553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810834305.0A Pending CN109056555A (en) | 2018-07-26 | 2018-07-26 | Pre-pressing bracket construction method |
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| Country | Link |
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| CN (1) | CN109056555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111576235A (en) * | 2020-05-30 | 2020-08-25 | 河南省第一建筑工程集团有限责任公司 | BIM-based No. 0 block longitudinal prestressed pipeline positioning construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090126957A (en) * | 2008-06-05 | 2009-12-09 | 주식회사 후레씨네코리아 | Pre-loading apparatus for upper structure unit of a bridge and bending method of upper structure unit using thereof |
| CN103590341A (en) * | 2013-11-19 | 2014-02-19 | 成军 | Method for constructing large-span multi-arch solid-web uniform-section circular arc stone-built arch bridge |
| CN107201827A (en) * | 2016-03-16 | 2017-09-26 | 中铁十五局集团有限公司 | Support pre-pressing construction method based on settlement observation |
| CN107905109A (en) * | 2017-11-21 | 2018-04-13 | 重庆建工市政交通工程有限责任公司 | The loads such as the cast-in-place platform simulation of great-leap-forward bridge are segmented precompressed construction method |
-
2018
- 2018-07-26 CN CN201810834305.0A patent/CN109056555A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090126957A (en) * | 2008-06-05 | 2009-12-09 | 주식회사 후레씨네코리아 | Pre-loading apparatus for upper structure unit of a bridge and bending method of upper structure unit using thereof |
| CN103590341A (en) * | 2013-11-19 | 2014-02-19 | 成军 | Method for constructing large-span multi-arch solid-web uniform-section circular arc stone-built arch bridge |
| CN107201827A (en) * | 2016-03-16 | 2017-09-26 | 中铁十五局集团有限公司 | Support pre-pressing construction method based on settlement observation |
| CN107905109A (en) * | 2017-11-21 | 2018-04-13 | 重庆建工市政交通工程有限责任公司 | The loads such as the cast-in-place platform simulation of great-leap-forward bridge are segmented precompressed construction method |
Non-Patent Citations (2)
| Title |
|---|
| LSHA506: "满堂支架的预压方案", 《百度文库》 * |
| 四川省公路学会工程施工专业委员会编辑委员: "《桥梁、隧道、道路、水港 2016年学术交流会论文集》", 30 June 2016 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111576235A (en) * | 2020-05-30 | 2020-08-25 | 河南省第一建筑工程集团有限责任公司 | BIM-based No. 0 block longitudinal prestressed pipeline positioning construction method |
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Application publication date: 20181221 |
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