CN110455255A - Full-hall support pre-pressing settlement monitoring device and monitoring method - Google Patents
Full-hall support pre-pressing settlement monitoring device and monitoring method Download PDFInfo
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- CN110455255A CN110455255A CN201910349911.8A CN201910349911A CN110455255A CN 110455255 A CN110455255 A CN 110455255A CN 201910349911 A CN201910349911 A CN 201910349911A CN 110455255 A CN110455255 A CN 110455255A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012806 monitoring device Methods 0.000 title claims abstract description 19
- 238000003825 pressing Methods 0.000 title claims abstract description 12
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 58
- 239000010959 steel Substances 0.000 claims abstract description 58
- 238000009432 framing Methods 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000003550 marker Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- 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)
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a full-hall support pre-pressing settlement monitoring device and a monitoring method, wherein the pre-pressing settlement monitoring device comprises an inverted U-shaped steel plate, a screw rod, a lifting rope, a lifting hammer, a steel plate gasket, an upper percentage table and a lower percentage table fixed on the steel plate gasket, the horizontal part of the inverted U-shaped steel plate is erected on a support top support, the inner end of the screw rod horizontally penetrates through a threaded hole in the vertical part of the inverted U-shaped steel plate and extends into the space between the two vertical parts of the inverted U-shaped steel plate, the screw rod is locked on the vertical part of the inverted U-shaped steel plate through a nut, the top end of the lifting rope is connected to the outer end of the screw rod, the bottom end of the lifting rope is connected with the lifting hammer, the steel plate gasket is positioned under the lifting hammer, the measuring rod of the upper percentage table vertically points to the lifting hammer and the measuring head of the lifting hammer is in pressing contact with the. The method effectively solves the problems that the monitoring of the prepressing deformation of the full support is greatly influenced by weather, fields and human factors, and the monitoring data is inaccurate and inaccurate.
Description
Technical field
The present invention relates to full framing prepressing deformation monitoring technical field, specifically a kind of full framing preloading monitoring
Device and monitoring method.
Background technique
Raft support method is widely used in bridge construction, and pre-pressing bracket is then its important construction technology link, passes through
Pre-pressing bracket eliminates the inelastic deformation of bracket and ground, obtains flexible deformation value, bracket camber is accurately arranged, it is ensured that
Beam body line style is met the requirements, and bracket settlement observation monitoring is to ensure that whether qualified important of bracket safety and checking bracket precompressed
Technological means is to obtain accurate bracket camber, ensures the satisfactory important measures of bridge line style.Full framing prepressing deformation
Monitoring technology plays a key effect to bridge rack construction safety, beam body presentation quality.
But at present in full framing prepressing deformation monitoring technology, traditional monitoring technology utilizes third levelling practice,
The survey crew's specialized capability needed is more demanding, and levelling practice is larger by inside even from weather, control point arrangement and field
Ground landform restricted problem, causes measurement procedure cumbersome, often because measuring a turn station, levelling rod personnel and level backsight personnel being helped to operate not
When causing monitoring data wrong, it is affected by human factors larger.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of full framing preloading monitoring device and monitoring methods, have
Effect solve full framing prepressing deformation monitoring influenced by weather, place, human factor, monitoring data inaccuracy and inaccurately
Problem.
The technical solution of the present invention is as follows:
A kind of full framing preloading monitoring device, include inverted U-shaped steel plate, screw rod, lifting rope, sash weight, steel plate gasket,
It is fixed on the upper dial gauge and lower dial gauge of metal mat on piece, the horizontal component of the inverted U-shaped steel plate is set up in holder jacking
On, threaded hole is provided in a wherein vertical portion for inverted U-shaped steel plate, the inner end of the screw rod horizontal through threaded hole and is stretched
Enter between two vertical portions of inverted U-shaped steel plate, screw rod is lock onto the vertical portion of inverted U-shaped steel plate by nut, described
The top of lifting rope is connected on the outer end of screw rod, and the bottom end of lifting rope is connected with sash weight, and the steel plate gasket is being located at sash weight just
Lower section, the measuring rod of upper dial gauge is directed vertically to sash weight and its measuring head is contacted with sash weight extruding, and lower dial gauge is located at bracket bottom
The surface of seat, the measuring rod of lower dial gauge is directed vertically to bracket base and its measuring head is contacted with bracket base extruding.
The horizontal component of the inverted U-shaped steel plate is set up on holder jacking and is squeezed by main joist on holder jacking
Gu the horizontal component sandwiched of that is, inverted U-shaped steel plate is fixed between holder jacking and main joist.
Both ends of two vertical portions of the inverted U-shaped steel plate respectively against holder jacking.
The steel plate gasket is located at the side of rack rod, and metal mat on piece is fixedly connected with dial gauge bracket under
Dial gauge bracket, upper dial gauge bracket vertical are fixed on dial gauge bracket towards sash weight, upper dial gauge, lower dial gauge bracket
One end be fixedly connected on metal mat on piece, the other end of lower dial gauge bracket stretches to rack rod, and the lower dial gauge is solid
Due to the surface on the other end of lower dial gauge bracket and positioned at bracket base.
The upper dial gauge bracket and lower dial gauge bracket are fixed on metal mat on piece by magnetic bases absorption, on
Dial gauge bracket and lower dial gauge bracket are length adjustable bracket.
The lower dial gauge is adjacent to the axle center of rack rod.
A kind of full framing preloading monitoring method, has specifically included following steps:
(1), basement process and bed course pour: 1m is widened according to beam body actual edge position again, to precompressed ground sideline into
Row setting-out label carries out ground precompressed, carries out bed course after ground precompressed is qualified and pour and maintain, reach its intensity to cushion layer concrete and want
It asks；
(2), bracket is set up: being carried out setting-out mark to the surrounding sideline point of rack rod, has been measured the plane transverse and longitudinal of bracket
Cloth is away from setting up bracket according to marked unit grid and vertical step pitch and using the unit grid set up of line of ink marker pop-up bracket；
(3), monitoring control point arrangement: when structure across footpath is no more than 40m, longitudinal along structure answers cloth every 1/4 across footpath
Set a measuring frequency section；When structure across footpath is greater than 40m, the distance between longitudinally adjacent measuring frequency section is not more than 10m；Each sight
The monitoring point surveyed on section should be no less than 5, and be arranged symmetrically；Every group of monitoring point on each measuring frequency section in cradle top and
It is laid on frame bottom corresponding position, and cradle top at monitoring point and bottom are marked；
(4), monitoring device is installed: being placed inverted U steel plate on the holder jacking at monitoring point, and is set up main dragon in time
Bone, inverted U steel plate are fixedly clamped between holder jacking and main joist, then screw rod is fixed on to the threaded hole of inverted U steel plate
In, according to the height of screw rod and ground, lifting rope length has been measured, lifting rope top has been connected on screw rod, lifting rope bottom end connects sash weight；
(5), distribution beam and template installation: the arrangement and method for construction requirement set up by bracket and template installs main joist, secondary dragon
Bone and template；
(6), dial gauge installation and debugging: the fixation steel plate gasket immediately below sash weight, upper dial gauge bracket and lower dial gauge
Bracket is fixedly connected in metal mat on piece, and upper dial gauge is fixed on upper dial gauge bracket, and the measuring rod of upper dial gauge is perpendicular
It directs to sash weight and its measuring head is contacted with sash weight extruding, dial gauge bracket keeps dial gauge generation one lesser just in adjustment
Beginning degree x1, and record, lower dial gauge bracket is set up again in same metal mat on piece, and lower dial gauge is fixed on lower dial gauge support
On frame and it is located at the surface of bracket base, the measuring rod of lower dial gauge is directed vertically to bracket base and its measuring head and bracket bottom
Seat squeezes contact, and adjusting lower dial gauge bracket makes lower dial gauge generate a maximum initial reading and record y1；
(7), precompressed load and settlement observation: since the span centre of structure longitudinal direction to from fulcrum, structure centre line to two sides into
Row is arranged symmetrically load, and successively the load of hierarchical loading is until capacity value reaches 100%, after the completion of every grade of load, at interval of 12h
Bracket settling amount is monitored；During hierarchical loading, when the difference of reading of upper dial gauge and both difference of readings of lower dial gauge
Difference continuous 2 average value when being respectively less than 2mm, can continue to load, measuring point reading for 24 hours be spaced after load；According to upper percentage
The difference of the difference of reading of table and lower dial gauge difference of reading calculates bracket differential settlement, and bracket differential settlement is equal to (xi-xi-1)-(yi-1-
yi), the accumulative settling amount that pre-pressing bracket is completed is equal to (xi-x1)-(y1-yi), xiDial gauge is gone up when reaching 100% for capacity value
Reading, yiReach the reading of 100% dial gauge at present for capacity value；
(8), unload and monitor: load preloading block is disposably unloaded, unload carry out after 6 hours up to a hundred points of tables with
The reading of lower dial gauge, calculates unloading front and back differential settlement twice, i.e. rack elasticity deflection is equal to (xi-xi+1)-(yi+1-yi), branch
Inelastic deformation amount, that is, total settlement of frame is equal to (xi+1-x1) -(y1-yi+1), xi+1For the reading for recording up to a hundred points of tables after unloading
Number, yi+1For the reading for recording dial gauge after unloading；
(9), support debugging determines bracket camber according to rack elasticity deflection, adjusts holder jacking, it is ensured that beam body line
Type is smooth.
After the described precompressed ground sideline setting-out label, bed course levelling of the land is carried out to precompressed ground before pouring and is rolled,
Basement process is carried out to unfavorable geology；Control pours bed course flatness when the bed course pours.
The capacity value of the hierarchical loading is followed successively by 60%, 80% and 100% of prefabricating load value in unit.
The bracket settling amount average value is less than 1mm at each monitoring point, and continuously bracket settles at each monitoring point three times
When amount average value adds up to be less than 5mm, pre-pressing bracket is met the requirements, and records the percentage meter reading of hierarchical loading, and carry out subsequent branch
The calculating of frame settling amount.
Advantages of the present invention:
Full framing preloading monitoring device of the invention is easily assembled to set up, and observation is easy to operate, by place, day
Gas, human factor influence are smaller, do not need high-quality professional survey crew, and observation operating efficiency is high, observes real-time property
By force, it observes data accuracy and accuracy is high.Monitoring method operating process of the present invention is simple, it is easy to accomplish, it is suitble to standardization pipe
Reason, plays very great benefit to the promotion of construction safety, construction quality, construction reference.
Detailed description of the invention
Fig. 1 is each monitoring point of the present invention and metal mat plate plane layout drawing.
Fig. 2 is the use structural schematic diagram of full framing preloading monitoring device of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
See Fig. 2, a kind of full framing preloading monitoring device includes inverted U-shaped steel plate 4, screw rod 5, lifting rope 6, sash weight
7, steel plate gasket 8, the upper dial gauge 11 and lower dial gauge 12 that are fixed on steel plate gasket 8, the horizontal component frame of inverted U-shaped steel plate 4
It is squeezed admittedly on holder jacking 2 and through main joist on holder jacking 2, i.e., the horizontal component sandwiched of inverted U-shaped steel plate 4 is fixed on
Between holder jacking 2 and main joist, both ends of two vertical portions of inverted U-shaped steel plate 4 respectively against holder jacking 2, inverted U-shaped steel plate
Threaded hole is provided in a 4 wherein vertical portion, the inner end of screw rod 5 horizontal through threaded hole and extend into the shape of falling U steel plate 4
Two vertical portions between, screw rod 5 is lock onto the vertical portion of inverted U-shaped steel plate 4 by nut, and the top of lifting rope 6 is connected to
On the outer end of screw rod 5, the bottom end of lifting rope 6 is connected with sash weight 7, and steel plate gasket 8 is located at the underface of sash weight 7 and is located at rack rod
1 side, dial gauge bracket 9 and lower dial gauge bracket 10 are fixedly connected on steel plate gasket 8, and upper dial gauge bracket 9 is vertical
Towards sash weight 7, upper dial gauge 11 is fixed on dial gauge bracket 9, the measuring rod of upper dial gauge 11 be directed vertically to sash weight 7 and
Its measuring head is contacted with the extruding of sash weight 7, and one end of lower dial gauge bracket 10 is fixedly connected on steel plate gasket 7, lower dial gauge support
The other end of frame 10 stretches to rack rod 1, and lower dial gauge 12 is fixed on the other end of lower dial gauge bracket 10 and is located at bracket
The surface of pedestal 3, lower dial gauge 12 are directed vertically to bracket adjacent to the axle center of rack rod 1, the measuring rod of lower dial gauge 12
Pedestal 3 and its measuring head are squeezed with bracket base 3 to be contacted.
Wherein, upper dial gauge bracket 9 and lower dial gauge bracket 10 are fixed on steel plate gasket 7 by the absorption of magnetic bases 13
On, upper dial gauge bracket 9 and lower dial gauge bracket 10 are length adjustable bracket.
A kind of full framing preloading monitoring method, has specifically included following steps:
(1), basement process and bed course pour: widening 1m again according to beam body actual edge position, put to precompressed ground sideline
Sample label, then levelling of the land and load precompressed are carried out to precompressed ground, basement process is carried out to unfavorable geology, then carries out bed course
It pours, control pours bed course flatness when bed course pours, then maintains bed course, reaches its intensity requirement to cushion layer concrete；
(2), bracket is set up: being seen Fig. 1, is carried out setting-out mark to the surrounding sideline point of rack rod, the plane for having measured bracket is horizontal
Vertical cloth is away from and the unit grid set up using line of ink marker pop-up bracket is being distributed according to marked unit grid and vertical step pitch
The infall of beam 01 sets up bracket 02；
(3), monitoring control point arrangement: being shown in Fig. 1, and when structure across footpath is no more than 40m, longitudinal along structure answers every 1/4 across footpath
Arrange a measuring frequency section；When structure across footpath is greater than 40m, the distance between longitudinally adjacent measuring frequency section is not more than 10m；Each
Monitoring point 03 on measuring frequency section should be no less than 5, and be arranged symmetrically；Every group of monitoring point 03 on each measuring frequency section is in bracket
It is laid on top and frame bottom corresponding position, and cradle top at monitoring point 03 and bottom are marked；
(4), monitoring device is installed: being seen Fig. 2, inverted U steel plate 4 is placed on the holder jacking 2 at monitoring point, and set up master in time
Keel, inverted U steel plate 4 are fixedly clamped between holder jacking and main joist, then screw rod 5 is fixed on to the spiral shell of inverted U steel plate
In pit, according to the height of screw rod 5 and ground, 6 length of lifting rope is measured, 6 top of lifting rope has been connected on screw rod 5,6 bottom end of lifting rope
Connect sash weight 7；
(5), distribution beam and template installation: the arrangement and method for construction requirement set up by bracket and template, install main joist, secondary joist and
Template；
(6), dial gauge installation and debugging: Fig. 2 is seen, in 7 underface fixation steel plate gasket 8 of sash weight, upper dial gauge bracket 9 and lower hundred
Divide table bracket 10 to be fixedly connected on steel plate gasket 8, upper dial gauge 11 is fixed on upper dial gauge bracket 9, upper dial gauge
11 measuring rod is directed vertically to sash weight 7 and its measuring head is contacted with the extruding of sash weight 7, and dial gauge bracket 9 makes dial gauge in adjustment
11 generate a lesser initial degree x1, and record, set up lower dial gauge bracket 10 again on same steel plate gasket 8, under
Dial gauge 12 is fixed on the surface on lower dial gauge bracket 10 and being located at bracket base 3, and the measuring rod of lower dial gauge 12 is vertical
It is directed toward bracket base 3 and its measuring head is contacted with the extruding of bracket base 3, adjusting lower dial gauge bracket 10 generates lower dial gauge 12
One maximum initial reading simultaneously records y1；
(7), precompressed load and settlement observation: since the span centre of structure longitudinal direction to from fulcrum, structure centre line carries out pair to two sides
Claim arrangement load, successively the load of hierarchical loading, the capacity value of hierarchical loading are followed successively by 60% of prefabricating load value in unit, 80%
With 100%, after the completion of every grade of load, bracket settling amount is monitored at interval of 12h；During hierarchical loading, when upper dial gauge
Difference of reading and difference continuous 2 average value of both difference of readings of lower dial gauge when being respectively less than 2mm, can continue to load, add
Measuring point reading for 24 hours is spaced after load；Bracket settling amount average value is less than 1mm at each monitoring point, continuously bracket at each monitoring point three times
When settling amount average value adds up to be less than 5mm, pre-pressing bracket is met the requirements, according to the difference of reading of upper dial gauge and lower percentage meter reading
The difference of difference calculates bracket differential settlement, and bracket differential settlement is equal to (xi-xi-1)-(yi-1-yi), and pre-pressing bracket is completed accumulative heavy
Drop amount is equal to (xi-x1)-(y1-yi).
Claims (10)
1. a kind of full framing preloading monitoring device, it is characterised in that: include inverted U-shaped steel plate, screw rod, lifting rope, sash weight,
Steel plate gasket, the upper dial gauge for being fixed on metal mat on piece and lower dial gauge, the horizontal component of the inverted U-shaped steel plate are set up in
On holder jacking, it is provided with threaded hole in a wherein vertical portion for inverted U-shaped steel plate, the inner end of the screw rod is horizontal through spiral shell
Pit is simultaneously extend between two vertical portions of inverted U-shaped steel plate, and screw rod lock onto the vertical portion of inverted U-shaped steel plate by nut
On, the top of the lifting rope is connected on the outer end of screw rod, and the bottom end of lifting rope is connected with sash weight, and the steel plate gasket is located at
The underface of sash weight, the measuring rod of upper dial gauge is directed vertically to sash weight and its measuring head is contacted with sash weight extruding, lower percentage epitope
In the surface of bracket base, the measuring rod of lower dial gauge is directed vertically to bracket base and its measuring head connects with bracket base extruding
Touching.
2. a kind of full framing preloading monitoring device according to weighing and require 1, it is characterised in that: the inverted U-shaped steel
The horizontal component of plate is set up on holder jacking and squeezes solid, i.e., the horizontal part of inverted U-shaped steel plate by main joist on holder jacking
Point sandwiched is fixed between holder jacking and main joist.
3. a kind of full framing preloading monitoring device according to weighing and require 1, it is characterised in that: the inverted U-shaped steel
Both ends of two vertical portions of plate respectively against holder jacking.
4. a kind of full framing preloading monitoring device according to weighing and require 1, it is characterised in that: the steel plate gasket
Positioned at the side of rack rod, metal mat on piece is fixedly connected with dial gauge bracket and lower dial gauge bracket, upper dial gauge support
Frame is vertically oriented to sash weight, and upper dial gauge is fixed on dial gauge bracket, and one end of lower dial gauge bracket is fixedly connected on steel plate
On gasket, the other end of lower dial gauge bracket stretches to rack rod, and the lower dial gauge is fixed on the another of lower dial gauge bracket
Surface on one end and positioned at bracket base.
5. a kind of full framing preloading monitoring device according to weighing and require 4, it is characterised in that: the upper dial gauge
Bracket and lower dial gauge bracket are fixed on metal mat on piece, upper dial gauge bracket and lower dial gauge support by magnetic bases absorption
Frame is length adjustable bracket.
6. a kind of full framing preloading monitoring device according to weighing and require 4, it is characterised in that: the lower dial gauge
Adjacent to the axle center of rack rod.
7. a kind of full framing preloading monitoring method, it is characterised in that: specifically included following steps:
(1), basement process and bed course pour: widening 1m again according to beam body actual edge position, put to precompressed ground sideline
Sample label carries out ground precompressed, carries out bed course after ground precompressed is qualified and pour and maintain, reach its intensity requirement to cushion layer concrete；
(2), bracket is set up: setting-out mark is carried out to the surrounding sideline point of rack rod, measured the plane transverse and longitudinal cloth of bracket away from,
And the unit grid set up using line of ink marker pop-up bracket, bracket is set up according to marked unit grid and vertical step pitch；
(3), monitoring control point arrangement: when structure across footpath is no more than 40m, longitudinal along structure should arrange one every 1/4 across footpath
A measuring frequency section；When structure across footpath is greater than 40m, the distance between longitudinally adjacent measuring frequency section is not more than 10m；Each observation is disconnected
Monitoring point on face should be no less than 5, and be arranged symmetrically；Every group of monitoring point on each measuring frequency section is in cradle top and bracket
It is laid on the corresponding position of bottom, and cradle top at monitoring point and bottom are marked；
(4), monitoring device is installed: being placed inverted U steel plate on the holder jacking at monitoring point, and is set up main joist in time, U
Shape steel plate is fixedly clamped between holder jacking and main joist, is then fixed on screw rod in the threaded hole of inverted U steel plate, according to
The height of screw rod and ground has measured lifting rope length, and lifting rope top is connected on screw rod, and lifting rope bottom end connects sash weight；
(5), distribution beam and template installation: the arrangement and method for construction requirement set up by bracket and template, install main joist, secondary joist and
Template；
(6), dial gauge installation and debugging: the fixation steel plate gasket immediately below sash weight, upper dial gauge bracket and lower dial gauge bracket
It is fixedly connected in metal mat on piece, upper dial gauge is fixed on upper dial gauge bracket, the measuring rod of upper dial gauge refers to vertically
To sash weight and its measuring head is contacted with sash weight extruding, and dial gauge bracket makes dial gauge generate a lesser initial degree in adjustment
Number x1, and record, lower dial gauge bracket is set up again in same metal mat on piece, and lower dial gauge is fixed on lower dial gauge bracket
And it is located at the surface of bracket base, the measuring rod of lower dial gauge is directed vertically to bracket base and its measuring head and bracket base squeeze
Press contacts, adjusting lower dial gauge bracket makes lower dial gauge generate a maximum initial reading and records y1；
(7), precompressed load and settlement observation: since the span centre of structure longitudinal direction to from fulcrum, structure centre line carries out pair to two sides
Claim arrangement load, successively the load of hierarchical loading is until capacity value reaches 100%, after the completion of every grade of load, at interval of 12h to branch
Frame settling amount is monitored；During hierarchical loading, when the difference of both the difference of reading of the difference of reading and lower dial gauge of upper dial gauge
It when being worth continuous 2 average value and being respectively less than 2mm, can continue to load, measuring point reading for 24 hours be spaced after load；According to upper dial gauge
The difference of difference of reading and lower dial gauge difference of reading calculates bracket differential settlement, and bracket differential settlement is equal to (xi-xi-1)-(yi-1-yi),
The accumulative settling amount that pre-pressing bracket is completed is equal to (xi-x1)-(y1-yi), xiThe reading of dial gauge is gone up when reaching 100% for capacity value
Number, yiReach the reading of 100% dial gauge at present for capacity value；
(8), it unloads and monitors: load preloading block disposably being unloaded, carries out up to a hundred points of tables and lower hundred after unloading 6 hours
Divide the reading of table, calculate unloading front and back differential settlement twice, is i.e. rack elasticity deflection is equal to (xi-xi+1)-(yi+1-yi), bracket
Inelastic deformation amount, that is, total settlement is equal to (xi+1-x1)-(y1-yi+1), xi+1To record the readings of up to a hundred points of tables after unloading,
yi+1For the reading for recording dial gauge after unloading；
(9), support debugging determines bracket camber according to rack elasticity deflection, adjusts holder jacking, it is ensured that beam body line style is flat
It is suitable.
8. a kind of full framing preloading monitoring method according to claim 7, it is characterised in that: the precompressed
After base sideline setting-out label, bed course precompressed ground levelling of the land and roll before pouring, unfavorable geology is carried out at ground
Reason；Control pours bed course flatness when the bed course pours.
9. a kind of full framing preloading monitoring method according to claim 7, it is characterised in that: the classification adds
The capacity value of load is followed successively by 60%, 80% and 100% of prefabricating load value in unit.
10. a kind of full framing preloading monitoring method according to claim 7, it is characterised in that: when each monitoring point
Locate the bracket settling amount average value less than 1mm, continuously bracket settling amount average value is accumulative at each monitoring point three times is less than 5mm
When, pre-pressing bracket is met the requirements, and records the percentage meter reading of hierarchical loading, and carry out the calculating of subsequent bracket settling amount.
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| CN201910349911.8A CN110455255B (en) | 2019-04-28 | 2019-04-28 | Device and method for monitoring prepressing settlement of full framing |
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| RU2220251C2 (en) * | 2001-08-06 | 2003-12-27 | Калустян Эдуард Семенович | Method establishing deformation characteristics of bedrock by data of observations on location |
| KR100624220B1 (en) * | 2006-05-04 | 2006-09-15 | 김은주 | Structure settlement measuring method |
| KR20100033212A (en) * | 2008-09-19 | 2010-03-29 | 주식회사 서신엔지니어링 | Sinking measuring method for soft ground |
| WO2017121315A1 (en) * | 2016-01-12 | 2017-07-20 | 广州机施建设集团有限公司 | Construction method for building truss and floor slab |
| WO2017125018A1 (en) * | 2016-01-21 | 2017-07-27 | 中铁第四勘察设计院集团有限公司 | Device for monitoring void value of settlement of rail support beam and roadbed of medium-low-speed magnetic suspension low line |
| CN207335688U (en) * | 2017-09-06 | 2018-05-08 | 武汉建工集团股份有限公司 | A kind of observation device of full framing support platform preloading |
| CN209673084U (en) * | 2019-04-28 | 2019-11-22 | 中铁四局集团第五工程有限公司 | A kind of full framing preloading monitoring device |
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