CN110042761A - A kind of 0# block bracket prestress prepressing engineering method - Google Patents
A kind of 0# block bracket prestress prepressing engineering method Download PDFInfo
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- CN110042761A CN110042761A CN201910367268.1A CN201910367268A CN110042761A CN 110042761 A CN110042761 A CN 110042761A CN 201910367268 A CN201910367268 A CN 201910367268A CN 110042761 A CN110042761 A CN 110042761A
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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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Abstract
The present invention provides a kind of 0# block bracket prestress prepressing engineering methods, comprising the following steps: step 1: carrying jack reaction frame, reaction frame is placed on bracket and is connect with pier shaft；Step 2: dial gauge being set in the horizontal segment root of bracket, setting total station detects pier shaft axis deviant；Step 3: carrying out reference measurement before precompressed, read each dial gauge initial value, record total station initial value；Step 4: jack several times, interval be forced into the 120% of load, every time pressurization after keep carrying out percentage meter reading again, record total station in pier shaft misalignment of axe amount.Through the above scheme, the effect that Quick-pressing is realized using reaction frame and jack, gets rid of traditional sandbag or a series of inconvenience of water tank bring, is able to achieve the deformation measurement to bracket and pier shaft by dial gauge and total station, guarantee exquisite DATA REASONING, determines whether to meet the requirements.
Description
Technical field
The present invention relates to field of bridge construction more particularly to a kind of 0# block bracket prestress prepressing engineering methods.
Background technique
In bridge 0# block technical field of construction, the construction of 0# block concrete is carried out using pre-buried bracket, due to the change of bracket
Shape is on 0# concrete quality and the vital influence of the linear generation of beam body.Under three dimension prestressing and reaction of supports effect, 0#
Block is in complicated stress state, between inhomogeneous deformation make the stress concentration phenomenon of bottom plate near fulcrum, floor.Cause
This, needs to reduce deformation of timbering by precompressed, prevents from cracking, and it is linear to improve beam body；Carrier structure safety can be checked simultaneously, prevented
It is only unexpected to occur.
It is wherein relatively common to bracket progress precompressed using sandbag or water tank, by place (the high 76m-175m of pier is differed) and certainly
The limitation of right condition (insufficient water sources), carrys out precompressed according to sandbag or water tank, fetches water and lift extremely difficult, and process is numerous
It is more, the duration is longer, higher cost.
In view of this, it is proposed that a kind of 0# block bracket prestress prepressing engineering method solves the above problems.
Summary of the invention
The purpose of the present invention is to provide a kind of 0# block bracket prestress prepressing engineering methods, by using jack as pressure
Power source, cooperation optimization engineering method reduce difficulty of construction and cost to realize simplified precompressed work progress, it is easier to measurement support
Whether frame meets construction demand.
The technology that the present invention uses is:
A kind of 0# block bracket prestress prepressing engineering method, comprising the following steps:
Step 1: carrying jack, support frame, reaction frame, support frame is placed on bracket, reaction frame is connect with pier shaft；
Step 2: dial gauge being set in the horizontal segment root of bracket, setting total station detects pier shaft axis deviant；
Step 3: carrying out reference measurement before precompressed, read each dial gauge initial value, record total station initial value；
Step 4: jack several times, interval be forced into the 120% of load, every time pressurization after keep carrying out percentage meter reading again, remember
Record pier shaft misalignment of axe amount in total station.
Through the above scheme, the effect that Quick-pressing is realized using reaction frame and jack, gets rid of traditional sandbag or water
A series of inconvenience of case bring are able to achieve the deformation measurement to bracket and pier shaft by dial gauge and total station, guarantee exquisiteness
DATA REASONING determines whether to meet the requirements.
Support frame and reaction frame are integrally set up simply, can be recycled, and transport also more facilitates, reduce construction at
This.
As advanced optimizing for scheme, step 1 the following steps are included:
Step 1.1: bracket being mounted on pier shaft by embedded board and connecting plate, two lateral bracket of pier shaft passes through finish rolling deformed bar
To drawing；
Step 1.2: setting up lateral I-steel on bracket, be laid with distribution beam on the first lateral I-steel, the in distribution beam
Two lateral I-steel place jack on the second lateral I-steel；
Step 1.3: placing load bearing beam on jack, shoulder pole girder is placed on load bearing beam, shoulder pole girder passes through the top surface steel of pier shaft
Muscle is connect with pier shaft.
As advanced optimizing for scheme, the first lateral I-steel is vertically arranged with bracket, the first lateral I-steel with divide
It is vertically arranged with beam, distribution beam is vertically arranged with the second lateral I-steel, and load bearing beam is vertically arranged with the second lateral I-steel, flat
Spreader beam is vertically arranged with load bearing beam.
It has been pre-designed embedded board and connecting plate on the pier shaft of 0# block, mounting bracket has been used for, is arranged on pier shaft multiple
Supporting point of the bracket for the whole stress of bracket, between bracket in same level, the bracket in the same side sets up the
One lateral I-steel and distribution beam form the force structure of right-angled intersection, and load bearing beam and shoulder pole girder also form the stress of right-angled intersection
Structure, jack are easier power carrying out uniform conductive.It is high to intersect the reaction frame frame body overall stability set up, power conductive performance
By force.
As advanced optimizing for scheme, step 4 the following steps are included:
Step 4.1: jack pressurizes by 20%, 40%, 80%, 100% load of design load, reads hundred after holding lotus every time 30 minutes
Divide table and total station data；
Step 4.2: being forced into the 120% of design load, holding lotus 1 hour, 2 hours, 4 hours, 6 hours, 12 hours and 24 respectively
Dial gauge registration and total station data are read after hour；
Step 4.3: a point Pyatyi unloads, by load 100%, 80%, 40%, 20%, 0%, hold every time lotus read after twenty minutes dial gauge with
Total station data.
It is forced into the 120% of load using Pyatyi, reaches pre-compressed effect, controls the multiple DATA REASONING under 120% load,
Guarantee is unloaded after meeting construction requirement using Pyatyi, guarantees bracket pre-compressed effect.By reasonably boosting and being depressured, lotus is held in control
Time can obtain accurate data, control the duration of integral construction.
As advanced optimizing for scheme, step 4.2 is further comprising the steps of:
Step 4.2.1: until 6 hours, the 12 hours and 24 hours unchanged rear progress steps 4.3 of data；
Step 4.2.2: when step 4.2.1 records data variation, continuing to hold lotus, carry out a data record per hour, until
Last 3 data carry out step 4.3 when unchanged again.
When 120% load, measurement data, which is met the requirements, to be unloaded, when pre-compressed effect backlog demand
When, it needs further to walk and holds lotus precompressed, until pre-compressed effect is met the requirements.
As advanced optimizing for scheme, the second lateral I-steel is Two bors d's oeuveres I36b I-steel, and load bearing beam is Two bors d's oeuveres I600
I-steel, shoulder pole girder are Two bors d's oeuveres I25b I-steel.Two bors d's oeuveres I-steel can step down for top surface reinforcing bar, while structure is more steady
Fixed, when carrying reaction frame, stability is more preferable, it is easier to set up.It is provided simultaneously for the support of jack with force sufficiently large
Forced area.
As advanced optimizing for scheme, distribution beam is I36b I-steel with the first lateral I-steel.Not with jack
In the structure that contact and top surface reinforcing bar are stepped down, it can be met the requirements using common I-steel.
As advanced optimizing for scheme, locking mechanism between top surface reinforcing bar and shoulder pole girder, locking mechanism includes the first pressure
Plate and the first briquetting and several clamp nuts, clamp nut are set on the reinforcing bar of top surface, and top surface reinforcing bar sequentially passes through the first pressure
Plate, the first briquetting and clamp nut, the first pressing plate and the first briquetting successively overlay on shoulder pole girder.
As advanced optimizing for scheme, jack base, jack are equipped between jack and the second lateral I-steel
Jack top plate is equipped between load bearing beam.
As advanced optimizing for scheme, jack base, jack top plate are overlapped with the center line of jack three.Thousand
Jin top top plate and pedestal, are transmitted, structure is more stable for the power to jack.
Compared with prior art, the beneficial effects of the present invention are:
Through the above scheme, the effect that Quick-pressing is realized using reaction frame and jack, gets rid of traditional sandbag or water tank belt
A series of inconvenience come are able to achieve the deformation measurement to bracket and pier shaft by dial gauge and total station, guarantee exquisite data
Measurement, determines whether to meet the requirements.
Support frame and reaction frame are integrally set up simply, can be recycled, and transport also more facilitates, reduce construction at
This.
It is forced into the 120% of load using Pyatyi, reaches pre-compressed effect, controls the multiple DATA REASONING under 120% load,
Guarantee is unloaded after meeting construction requirement using Pyatyi, guarantees bracket pre-compressed effect.By reasonably boosting and being depressured, lotus is held in control
Time can obtain accurate data, control the duration of integral construction.
Detailed description of the invention
Fig. 1 is a kind of one of schematic diagram of 0# block bracket prestress prepressing engineering method provided by the invention；
Fig. 2 is the two of a kind of schematic diagram of 0# block bracket prestress prepressing engineering method provided by the invention；
Fig. 3 is a kind of structural schematic diagram of the locking mechanism of 0# block bracket prestress prepressing engineering method provided by the invention.
Specific embodiment
The present invention is described in detail for each embodiment shown in reference to the accompanying drawing, but it should be stated that, these
Embodiment is not limitation of the present invention, those of ordinary skill in the art according to these embodiments made by function, method,
Or equivalent transformation or substitution in structure, all belong to the scope of protection of the present invention within.
In the description of the present embodiment, it is to be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description the invention and simplifies description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For the limitation to the invention.
In addition, term " first ", " second ", " third " etc. are used for description purposes only, it is not understood to indicate or imply
Relative importance or the quantity for implicitly indicating indicated technical characteristic.The feature of " first ", " second " etc. is defined as a result,
It can explicitly or implicitly include one or more of the features.In the description of the invention, unless otherwise indicated,
The meaning of " plurality " is two or more.
Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to removable
Connection is unloaded, or is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, can pass through
Concrete condition understands concrete meaning of the above-mentioned term in the invention.
Embodiment 1:
Referring to shown in attached drawing 1-3, a kind of 0# block bracket prestress prepressing engineering method, comprising the following steps:
Step 1: carrying jack 6, support frame, reaction frame, support frame is placed on carrier 2, reaction frame is connect with pier shaft 1；
Step 2: dial gauge being set in the horizontal segment root of bracket 2, setting total station detects 1 axis deviant of pier shaft；
Step 3: carrying out reference measurement before precompressed, read each dial gauge initial value, record total station initial value；
Step 4: jack 6 several times, interval be forced into the 120% of load, every time pressurization after keep carrying out percentage meter reading again,
Record 1 misalignment of axe amount of pier shaft in total station.
In traditional construction, precompressed is carried out using water tank or sandbag, on the one hand because of the limit by place and natural conditions
System, on the other hand, weight everywhere cannot accomplish completely the same on carrier 2, and pre-compressed effect has local difference；Increasing simultaneously
It is very time-consuming during pressure, therefore, in the present embodiment, propose that a kind of 0# block bracket prestress prepressing engineering method is above-mentioned to solve
It is insufficient.In the present embodiment, the effect that Quick-pressing is realized using reaction frame and jack 6, gets rid of traditional sandbag or water tank
A series of inconvenience of bring are able to achieve the deformation measurement to bracket 2 and pier shaft 1 by dial gauge and total station, guarantee accurate
DATA REASONING determines whether to meet the requirements.
Support frame and reaction frame are integrally set up simply, can be recycled, and transport also more facilitates, reduce construction at
This.
As advanced optimizing for scheme, step 4 the following steps are included:
Step 4.1: jack 6 pressurizes by 20%, 40%, 80%, 100% load of design load, reads after holding lotus every time 30 minutes
Dial gauge and total station data；
Step 4.2: being forced into the 120% of design load, holding lotus 1 hour, 2 hours, 4 hours, 6 hours, 12 hours and 24 respectively
Dial gauge registration and total station data are read after hour；
Step 4.3: a point Pyatyi unloads, by load 100%, 80%, 40%, 20%, 0%, hold every time lotus read after twenty minutes dial gauge with
Total station data.
The key that bracket 2 carries out precompressed is rationally to control the grade of pressurization and holds the time of lotus, too fast pressurization
Pre-compressed effect be difficult to ensure that the excessively slow pressurization construction time is long.Using this engineering method, it is forced into the 120% of load using Pyatyi,
Reach pre-compressed effect, control the multiple DATA REASONING under 120% load, guarantee is unloaded using Pyatyi after meeting construction requirement, protected
Demonstrate,prove 2 pre-compressed effect of bracket.By reasonably boosting and being depressured, the lotus time is held in control, can obtain accurate data, and control is whole to be applied
The duration of work.
The control of this engineering method is about 52-53 hours in total duration, sets up reaction frame on daytime and starts to operate, and arrives third day daytime
It can be removed, day time operation is safer, while the data of dial gauge and total station are mentioned using that can be acquired by circuit
High operational safety.Multiple jack 6 may be implemented to go up and down simultaneously by circuit operation, is depressured using Pyatyi pressurization with Pyatyi,
Increasing or decreasing is carried out for low pressure and high pressure section, middle straightening, which is taken over, to be crossed, and unnecessary process is reduced.
As advanced optimizing for scheme, step 4.2 is further comprising the steps of:
Step 4.2.1: until 6 hours, the 12 hours and 24 hours unchanged rear progress steps 4.3 of data；
Step 4.2.2: when step 4.2.1 records data variation, continuing to hold lotus, carry out a data record per hour, until
Last 3 data carry out step 4.3 when unchanged again.
When 120% load, measurement data, which is met the requirements, to be unloaded, when pre-compressed effect backlog demand
When, it needs further to walk and holds lotus precompressed, until pre-compressed effect is met the requirements.
Embodiment 2:
It please refers to shown in Fig. 1-3, the present embodiment and the difference of embodiment 1 are to present embodiments provide a kind of support frame and counter-force
The erection method of frame and structure optimization, so that it is whole more stable, it sets up more convenient.
In the present embodiment, step 1 the following steps are included:
Step 1.1: bracket 2 being mounted on pier shaft 1 by embedded board and connecting plate, 1 liang of lateral bracket 2 of pier shaft passes through finish rolling screw thread
Reinforcing bar is to drawing；
Step 1.2: setting up lateral I-steel on carrier 2, distribution beam 4 is laid on the first lateral I-steel 3, in distribution beam 4
Upper second lateral I-steel 5 places jack 6 on the second lateral I-steel；
Step 1.3: placing load bearing beam 7 on jack 6, shoulder pole girder 8 is placed on load bearing beam 7, shoulder pole girder 8 passes through pier shaft 1
Top surface reinforcing bar 10 is connect with pier shaft 1.
As advanced optimizing for scheme, the first lateral I-steel 3 is vertically arranged with bracket 2, the first lateral I-steel 3 and
Distribution beam 4 is vertically arranged, and distribution beam 4 is vertically arranged with the second lateral I-steel 5, and load bearing beam 7 is vertical with the second lateral I-steel 5
Setting, shoulder pole girder 8 are vertically arranged with load bearing beam 7.
It has been pre-designed embedded board and connecting plate on the pier shaft 1 of 0# block, has been used for mounting bracket 2, has been arranged on pier shaft 1 more
A bracket 2 is used for the supporting point of whole stress, is in same level between bracket 2, the bracket 2 in the same side sets up first
Lateral I-steel 3 forms the force structure of right-angled intersection with distribution beam 4, load bearing beam 7 and shoulder pole girder 8 also formed right-angled intersection by
Power structure, jack 6 are easier power carrying out uniform conductive.It is high to intersect the reaction frame frame body overall stability set up, power conduction
Performance is strong.It can accomplish that strict vertical is placed by measuring tool between the I-steel of right-angled intersection, guarantee that reaction frame is set up
After entire normalization, meet design requirement.Using the above structure, I-steel is not likely to produce asking of toppling over when stress
Topic, independent one two piece building blocks extraction the same just as the structure of building blocks tower, building blocks tower can also guarantee stability, I-steel as
Building blocks are the same, reaction frame structure will not be caused to release because of the laying of individual I-steel is not in place, be anti-when initial pressure
When power frame is easiest to go wrong, it is therefore desirable to carry out precompressed before formal pressure, whether is detection reaction frame overall structure
It is problematic.
As advanced optimizing for scheme, the second lateral I-steel 5 is Two bors d's oeuveres I36b I-steel, and load bearing beam 7 is Two bors d's oeuveres
I600 I-steel, shoulder pole girder 8 are Two bors d's oeuveres I25b I-steel.Two bors d's oeuveres I-steel can step down for top surface reinforcing bar 10, while structure
More stable, when carrying reaction frame, stability is more preferable, it is easier to set up.It is provided simultaneously for the support of jack 6 with force
Sufficiently large forced area.
As advanced optimizing for scheme, distribution beam 4 and the first lateral I-steel 3 are I36b I-steel.Not with it is very heavy
In 6 contact of top and the structure stepped down without top surface reinforcing bar 10, it can be met the requirements using the common I-steel of multiple tracks.
As advanced optimizing for scheme, locking mechanism 9 between top surface reinforcing bar 10 and shoulder pole girder 8, locking mechanism 9 includes the
One pressing plate 91 and the first briquetting 92 and several clamp nuts 93, clamp nut 93 are set on top surface reinforcing bar 10, top surface reinforcing bar
10 sequentially pass through the first pressing plate 91, the first briquetting 92 and clamp nut 93, and the first pressing plate 91 is successively overlayed with the first briquetting 92
On shoulder pole girder 8.Using the structure of the first pressing plate 91 and the first briquetting 92 and clamp nut 93, it is able to achieve the support of reaction frame.
As advanced optimizing for scheme, it is equipped with 6 pedestal of jack between jack 6 and the second lateral I-steel 5, it is very heavy
6 top plate of jack is equipped between top 6 and load bearing beam 7.
As advanced optimizing for scheme, the center line weight of 6 pedestal of jack, 6 top plate of jack and 6 three of jack
It closes.6 top plate of jack and pedestal, are transmitted, structure is more stable for the power to jack 6.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of 0# block bracket prestress prepressing engineering method, which comprises the following steps:
Step 1: jack (6), support frame, reaction frame are carried, support frame is placed on bracket (2), reaction frame and pier shaft (1)
Connection；
Step 2: dial gauge being set in the horizontal segment root of bracket (2), setting total station detects pier shaft (1) axis deviant；
Step 3: carrying out reference measurement before precompressed, read each dial gauge initial value, record total station initial value；
Step 4: jack (6) several times, interval be forced into the 120% of load, every time pressurization after keep carrying out dial gauge reading again
Number records pier shaft (1) misalignment of axe amount in total station.
2. a kind of 0# block bracket prestress prepressing engineering method according to claim 1, which is characterized in that the step 1 includes
Following steps:
Step 1.1: bracket (2) being mounted on pier shaft (1) by embedded board and connecting plate, (1) two lateral bracket (2) of pier shaft passes through
Finish rolling deformed bar is to drawing；
Step 1.2: setting up lateral I-steel on bracket (2), be laid with distribution beam (4) on the first lateral I-steel (3), dividing
With the on beam (4) second lateral I-steel (5), jack (6) are placed on the second lateral I-steel；
Step 1.3: placing load bearing beam (7) on jack (6), place shoulder pole girder (8) on load bearing beam (7), shoulder pole girder (8) is logical
The top surface reinforcing bar (10) for crossing pier shaft (1) is connect with pier shaft (1).
3. a kind of 0# block bracket prestress prepressing engineering method according to claim 2, which is characterized in that the described first lateral work
Word steel (3) is vertically arranged with the bracket (2), and the described first lateral I-steel (3) is vertically arranged with the distribution beam (4), institute
It states distribution beam (4) to be vertically arranged with the described second lateral I-steel (5), the load bearing beam (7) and the second lateral I-steel
(5) it is vertically arranged, the shoulder pole girder (8) is vertically arranged with the load bearing beam (7).
4. a kind of 0# block bracket prestress prepressing engineering method according to claim 1, which is characterized in that the step 4 includes
Following steps:
Step 4.1: jack (6) pressurizes by 20%, 40%, 80%, 100% load of design load, reads after holding lotus every time 30 minutes
Take dial gauge and total station data；
Step 4.2: being forced into the 120% of design load, holding lotus 1 hour, 2 hours, 4 hours, 6 hours, 12 hours and 24 respectively
Dial gauge registration and total station data are read after hour；
Step 4.3: a point Pyatyi unloads, by load 100%, 80%, 40%, 20%, 0%, hold every time lotus read after twenty minutes dial gauge with
Total station data.
5. a kind of 0# block bracket prestress prepressing engineering method according to claim 4, which is characterized in that the step 4.2 is also
The following steps are included:
Step 4.2.1: until 6 hours, the 12 hours and 24 hours unchanged rear progress steps 4.3 of data；
Step 4.2.2: when step 4.2.1 records data variation, continuing to hold lotus, carry out a data record per hour, until
Last 3 data carry out step 4.3 when unchanged again.
6. a kind of 0# block bracket prestress prepressing engineering method according to claim 3, which is characterized in that the described second lateral work
Word steel (5) is Two bors d's oeuveres I36b I-steel, and the load bearing beam (7) is Two bors d's oeuveres I600 I-steel, and the shoulder pole girder (8) is Two bors d's oeuveres I25b
I-steel.
7. a kind of 0# block bracket prestress prepressing engineering method according to claim 6, which is characterized in that the distribution beam (4)
It is I36b I-steel with the described first lateral I-steel (3).
8. a kind of 0# block bracket prestress prepressing engineering method according to claim 2, which is characterized in that the top surface reinforcing bar
(10) locking mechanism (9) between the shoulder pole girder (8), the locking mechanism (9) include the first pressing plate (91) and the first briquetting
(92) and several clamp nuts (93), the clamp nut (93) are set on the top surface reinforcing bar (10), the top surface steel
Muscle (10) sequentially passes through first pressing plate (91), the first briquetting (92) and clamp nut (93), first pressing plate (91) with
First briquetting (92) successively overlays on the shoulder pole girder (8).
9. a kind of 0# block bracket prestress prepressing engineering method according to claim 3, which is characterized in that the jack (6)
It is equipped with jack (6) pedestal between the described second lateral I-steel (5), between the jack (6) and the load bearing beam (7)
Equipped with jack (6) top plate.
10. a kind of 0# block bracket prestress prepressing engineering method according to claim 9, which is characterized in that the jack (6)
Pedestal, jack (6) top plate are overlapped with the center line of jack (6) three.
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Application publication date: 20190723 |