CN105113418B - A kind of bearing pad stone construction lofting method - Google Patents
A kind of bearing pad stone construction lofting method Download PDFInfo
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- CN105113418B CN105113418B CN201510585968.XA CN201510585968A CN105113418B CN 105113418 B CN105113418 B CN 105113418B CN 201510585968 A CN201510585968 A CN 201510585968A CN 105113418 B CN105113418 B CN 105113418B
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- precast beam
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Abstract
The invention discloses a kind of bearing pad stone construction lofting method, belong to bridge construction setting-out technique field.The present invention solves that in prior art, bearing pad stone construction lofting measures difficulty, and the impact of pre-embedded steel slab dimensional discrepancy at the bottom of precast beam and precast beam can not be overcome, cause bearing cannot to comprise the following steps: step one makes precast beam termination framework of steel reinforcement model with the close problem of pre-embedded steel slab laminating at the bottom of precast beam；Step 2 makes and link model steel plate；Step 3 lays precast beam termination framework of steel reinforcement model；Step 4 bearing pad stone setting-out.It is applicable to the bearing pad stone construction lofting of the simply supported end of various prefabricated simply supported beam and continuous beam.
Description
Technical field
Present invention relates particularly to a kind of bearing pad stone construction lofting method, belong to bridge construction
Setting-out technique field.
Background technology
Bearing pad stone is disposed on the coupling part of abutment, pier top portion and bearing, bearing pad stone position
That puts is whether accurate, directly influence bearing can with precast beam bottom steel plate laminating closely,
If bearing occurs unsettled, the service life directly affecting bearing is even caused quality accident.
General bridge bearing pad stone surveying and locating is after Coping Construction completes, and carries out bearing pad stone construction
Before, need to accurately release the position of each bearing pad stone according to design drawing total powerstation, use level gauge
Accurately measure the design altitude of bearing pad stone.But in practice of construction, owing to bridge bent cap is in more
It is not easy to measure the position of operation, it is difficult to ensure that surveying and locating is accurate, even if surveying and locating is complete
Accurately, cannot guarantee that pre-embedded steel slab at the bottom of the installation precast beam back rest is the most closely connected with bearing, this is
Owing at the bottom of the size of precast beam and beam, the position angle etc. of pre-embedded steel slab also there will be deviation, even if
These deviations are in the range of specification allows, if these deviations are accumulated together, add
The trueness error of measuring instrument itself, will also result in the situation that bearing can not be the most closely connected.
Summary of the invention
Therefore, the present invention is directed to bearing pad stone construction lofting in prior art and measure difficulty,
And the impact of pre-embedded steel slab dimensional discrepancy at the bottom of precast beam and precast beam can not be overcome, cause
Bearing cannot be with the close problem of pre-embedded steel slab laminating at the bottom of precast beam, it is provided that a kind of seat cushion
Stone construction lofting method, said method comprising the steps of:
Step one makes precast beam termination framework of steel reinforcement model
By precast beam equal thickness pad on precast beam pedestal, make precast beam termination reinforcing bar
Skeleton pattern, precast beam termination framework of steel reinforcement model bottom lies on precast beam pedestal,
Inside dimension is consistent with precast beam termination and precast beam two coxostermum bottom, by prefabricated beam-ends
Head framework of steel reinforcement model is close to precast beam termination and precast beam two coxostermum bottom and consolidates
Fixed；
Step 2 makes and link model steel plate
By with beam at the bottom of the model steel plate of pre-embedded steel slab consistent size be close to pre-embedded steel slab at the bottom of beam
Go up and fix, with the reinforcing bars of more than three by model steel plate and precast beam termination framework of steel reinforcement
Model welds together；
Step 3 lays precast beam termination framework of steel reinforcement model
Precast beam tip position is made a mark by pier cap beam or abutment bent cap, will step
The precast beam termination framework of steel reinforcement model of rapid two link model steel plates is placed sequentially in order
On pier cap beam or abutment bent cap, precast beam termination framework of steel reinforcement model represents prefabricated beam-ends
One end of head is placed in mark position；
Step 4 bearing pad stone setting-out
Bearing pad stone plan-position is determined according to model steel Board position.
Further, described step one makes the side of precast beam termination framework of steel reinforcement model
Method be first precast beam termination one side lay more than two extend to erecting of precast beam pedestal
To reinforcing bar and fix, the web lower position in two faces of precast beam both sides lays two
The above vertical reinforcement extending to precast beam pedestal is also fixed, at precast beam pedestal surfaces
Position makes bottom reinforcement bars skeleton, bottom reinforcement bars skeleton and all of vertical reinforced-bar-welding
Connect, at bottom reinforcement bars skeleton connection fabricated above framework of steel reinforcement, connect framework of steel reinforcement with
All of vertical reinforced-bar-welding connects.
Further, described step one makes the side of precast beam termination framework of steel reinforcement model
Method is first to make the tetragon framework of steel reinforcement of two consistent size, two tetragon reinforcing bars
Three faces of frame connect into precast beam termination steel with the vertical reinforced-bar-welding of more than two respectively
Muscle skeleton pattern, precast beam termination framework of steel reinforcement moulded dimension meets the reinforcing bar of bottom
After frame lies on precast beam pedestal, all vertical reinforcements can be close to prefabricated beam-ends
Head and precast beam two coxostermum lower position holding are vertically.
Further, precast beam termination framework of steel reinforcement and precast beam termination in described step one
And precast beam two coxostermum bottom is fixed and pre-embedded steel slab at the bottom of step 2 middle mold shape steel plate and beam
Fixing method is uses adhesive tape sticking.
Further, described step 2 middle mold shape steel plate uses thickness to be 1mm to 3mm
Steel plate.
Further, in described step 3 on pier cap beam or abutment bent cap by precast beam
The precast beam tip position of offer is provided according to the method that tip position makes a mark,
The mark line of precast beam tip position is transversely marked on abutment bent cap or pier cap beam.
Further, in described step 3 on pier cap beam or abutment bent cap by precast beam
The precast beam tip position of offer is provided according to the method that tip position makes a mark,
Transversely mark the mark line of precast beam tip position on abutment bent cap or pier cap beam, survey
The physical length of amount precast beam, is distributed evenly over the difference of precast beam length with design load
On the pier cap beam at precast beam two ends or abutment bent cap, redefine precast beam tip position
And change mark line.
Further, according to model steel Board position, described step 4 determines that bearing pad stone is put down
The method of position, face be by be arranged on the perforate of model steel plate center place hang vertical
Line, hangs the center that position corresponding to vertical line had both been bearing pad stone, according to center
Determine bearing pad stone plan-position.
Further, according to model steel Board position, described step 4 determines that bearing pad stone is put down
The method of position, face is to put respectively by being arranged on the perforate of four corner positions of model steel plate
Put and hang vertical line, determine according to hanging vertical line correspondence position on abutment bent cap or pier cap beam
The projected position of model steel plate, the bearing pad stone size provided further according to design determines bearing
Pinner plan-position.
Further, described step 4 also includes the verification to model steel board plane position
Step, specially four angle points of measurement model steel plate hanging down to abutment bent cap or pier cap beam
Straight distance, makes tune according to the difference of vertical dimension to the plan-position of bearing pad stone end face
Whole, make bearing pad stone end face and the model steel plate keeping parallelism of setting-out.
The beneficial effects of the present invention is: the bearing pad stone construction lofting method of the present invention,
By making precast beam termination framework of steel reinforcement model and model steel plate, be equivalent to precast beam
End portion is replicated, can be readily according to the position of model steel plate on bent cap
Setting-out goes out the position of bearing pad stone, it is ensured that precast beam is installed at the bottom of rear support and precast beam pre-
Bury steel plate laminating closely, correct for due to precast beam size, and pre-embedded steel slab position, angle
The quality problems that the deviation of degree causes, this method is easy and simple to handle, it is adaptable to various prefabricated
Simply supported beam and the simply supported end of continuous beam, precast beam termination framework of steel reinforcement model and model steel plate
Can reuse, this method also reduces the workload of survey crew simultaneously.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present invention a kind of bearing pad stone construction lofting method；
Fig. 2 is to make precast beam termination framework of steel reinforcement model in the specific embodiment of the invention
And the schematic diagram of model steel plate；
Fig. 3 is the knot of precast beam termination framework of steel reinforcement model in the specific embodiment of the invention
Structure schematic diagram；
Fig. 4 is the structural representation of specific embodiment of the invention middle mold shape steel plate.
Reference is as follows:
1, precast beam；
2, precast beam pedestal；
3, precast beam termination framework of steel reinforcement model；
4, model steel plate；
5, perforate.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is illustrated:
By superstructure for the tool of the present invention is described as a example by the bridge type of freely-supported pre-cast hollow slab
Body embodiment, method flow as shown in Figure 1, use such as Fig. 2, Fig. 3, Fig. 4 institute
The device shown, the construction lofting method of bearing pad stone comprises the following steps:
Step one makes precast beam termination framework of steel reinforcement model 3
Precast beam 1 is used the flitch pad of equal thickness on precast beam pedestal 2, makes pre-
Beam-ends head framework of steel reinforcement model 3 processed, lies in bottom precast beam termination framework of steel reinforcement model 3
On precast beam pedestal 2, inside dimension and precast beam 1 termination and 1 liang of coxostermum of precast beam
Bottom is consistent, precast beam 1 termination framework of steel reinforcement model is close to precast beam 1 termination and
1 liang of coxostermum bottom blend compounds band of precast beam is pasted fixing.
The structure of precast beam termination framework of steel reinforcement model 3 is as shown in Figure 3.
For the beam length precast plate girder more than or equal to 16m, due to precast beam 1 tip width
Generally large, easily produce deviation, make precast beam termination framework of steel reinforcement model 3 and use
Method be first lay in side, precast beam 1 termination more than two extend to precast beam platform
Seat 2 vertical reinforcement and fix, in the web bottom of two sides of precast beam 1 both sides
The vertical reinforcement blend compounds band extending to precast beam pedestal 2 that position of sound production is more than two glues
Patch is fixing, makes bottom reinforcement bars skeleton, bottom steel at precast beam pedestal 2 surface location
Muscles and bones frame is connected with all of vertical reinforced-bar-welding, in bottom reinforcement bars skeleton company fabricated above
Connect framework of steel reinforcement, connect framework of steel reinforcement and be connected with all of vertical reinforced-bar-welding.
For the beam length precast plate girder less than 16m, owing to precast beam 1 tip width is difficult to
Deviation occurs, following method can be used to make precast beam termination framework of steel reinforcement model in advance
3, first make the tetragon framework of steel reinforcement of two consistent size, two tetragon frameworks of steel reinforcement
Three faces connect into precast beam termination reinforcing bar with the vertical reinforced-bar-welding of more than two respectively
Skeleton pattern 3, precast beam termination framework of steel reinforcement model 3 size meets the reinforcing bar of bottom
After frame lies on precast beam pedestal 2, all vertical reinforcements can be solid with adhesive tape sticking
It is scheduled on precast beam 1 termination and 1 liang of coxostermum lower position of precast beam and keeps vertically.
Step 2 makes and link model steel plate 4
Model steel plate 4 as shown in Figure 4, by with beam at the bottom of the model of pre-embedded steel slab consistent size
Steel plate 4 is close on pre-embedded steel slab at the bottom of beam and fixes, model steel plate 4 center and four angles
Portion pre-sets perforate 5, as in figure 2 it is shown, with the reinforcing bar of more than three by model steel plate 4
Weld together with precast beam termination framework of steel reinforcement model 3.
Steel plate that thickness be 1mm to 3mm is preferably used and makes model steel plate 4, the most permissible
Prevent steel plate to be deformed due to welding, be possible to prevent again due to self mistake of model steel plate 4
Weigh and be difficult to support.
Step 3 lays precast beam termination framework of steel reinforcement model 3
Take off precast beam termination framework of steel reinforcement model 3 and be transported at bridge location, at pier cap beam
Or on abutment bent cap, precast beam tip position is made a mark, set according to the method for labelling
The precast beam tip position that meter provides, transversely marks on abutment bent cap or pier cap beam
The mark line of precast beam tip position.
For the precast plate girder more than or equal to 16m, all right when labelling beam tip position
Carry out beam length verification, be specially measure precast beam physical length, by precast beam length with
The difference of design load is distributed evenly on pier cap beam or the abutment bent cap at precast beam two ends,
Redefine precast beam tip position and change mark line.For guaranteeing that position, beam length direction is accurate
Really, by survey crew, the actual range of the mark position of both sides two ends can be measured
Checking.
By the precast beam termination framework of steel reinforcement model 3 of step 2 link model steel plate in order
It is placed sequentially on pier cap beam or abutment bent cap, precast beam termination framework of steel reinforcement model 3
The one end representing precast beam termination is placed in mark position.
Step 4 bearing pad stone setting-out
Bearing pad stone plan-position is determined according to model steel plate 4 position.Propping up on bent cap
Processing, erection support pinner reinforcing bar on seat cushion stone embedded bar, branching standing template, measure mark
Height determines bearing pad stone top side location, after the assay was approved, the most pourable bearing pad stone coagulation
Soil.
For circular bearing pad stone, determine that bearing pad stone is put down according to model steel plate 4 position
The method of position, face be by be arranged on the perforate of model steel plate center place hang vertical
Line, hangs the center that position corresponding to vertical line had both been bearing pad stone, according to center
Determine bearing pad stone plan-position.
For the bearing pad stone of rectangle, determine bearing pad stone plane according to model steel Board position
The method of position is to put respectively by being arranged on the perforate of 4 four corner positions of model steel plate
Put and hang vertical line, determine according to hanging vertical line correspondence position on abutment bent cap or pier cap beam
The projected position of model steel plate, the bearing pad stone size provided further according to design determines bearing
Pinner plan-position.
Step 4 can also include the checking procedure to model steel plate 4 plan-position, tool
Body be 4 four angle points of measurement model steel plate to abutment bent cap or the vertical dimension of pier cap beam,
The plan-position of bearing pad stone end face is adjusted by the difference according to vertical dimension, makes to put
The bearing pad stone end face of sample and model steel plate 4 keeping parallelism, overcome because of pre-buried at the bottom of precast beam
Steel plate angular deviation and the unsettled problem of bearing that causes.
This method is applicable to prefabricated simply supported girder bridge, it is also possible to turn continuous print for freely-supported pre-
The simply supported end of beam bridge processed.This method only need to ensure that position on bent cap, the precast beam termination is accurate
Really, i.e. can ensure that pre-embedded steel slab at the bottom of the precast beam installed is the most closely connected with bearing, it is ensured that
Construction quality, it is to avoid hidden danger of quality.
The above is the preferred embodiment of the present invention, it is noted that for this technology
For the those of ordinary skill in field, on the premise of without departing from principle of the present invention,
Can also make some improvements and modifications, these improvements and modifications also should be regarded as the present invention's
Protection domain.
Claims (10)
1. a bearing pad stone construction lofting method, it is characterised in that described method includes
Following steps:
Step one makes precast beam termination framework of steel reinforcement model
By precast beam equal thickness pad on precast beam pedestal, make precast beam termination reinforcing bar
Skeleton pattern, precast beam termination framework of steel reinforcement model bottom lies on precast beam pedestal,
Inside dimension is consistent with precast beam termination and precast beam two coxostermum bottom, by prefabricated beam-ends
Head framework of steel reinforcement model is close to precast beam termination and precast beam two coxostermum bottom and consolidates
Fixed；
Step 2 makes and link model steel plate
By with beam at the bottom of the model steel plate of pre-embedded steel slab consistent size be close to pre-embedded steel slab at the bottom of beam
Go up and fix, with the reinforcing bars of more than three by model steel plate and precast beam termination framework of steel reinforcement
Model welds together；
Step 3 lays precast beam termination framework of steel reinforcement model
Precast beam tip position is made a mark by pier cap beam or abutment bent cap, will step
The precast beam termination framework of steel reinforcement model of rapid two link model steel plates is placed sequentially in order
On pier cap beam or abutment bent cap, precast beam termination framework of steel reinforcement model represents prefabricated beam-ends
One end of head is placed in mark position；
Step 4 bearing pad stone setting-out
Bearing pad stone plan-position is determined according to model steel Board position.
2. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
The method making precast beam termination framework of steel reinforcement model in described step one is first at precast beam
Termination one side is laid the vertical reinforcement extending to precast beam pedestal of more than two and fixes,
Web lower position in two faces of precast beam both sides lay more than two extend to pre-
The vertical reinforcement of beam making bench is also fixed, bottom precast beam pedestal surfaces position makes
Framework of steel reinforcement, bottom reinforcement bars skeleton is connected with all of vertical reinforced-bar-welding, in bottom steel
Muscles and bones frame connection fabricated above framework of steel reinforcement, connects framework of steel reinforcement and all of vertical reinforcement
It is welded to connect.
3. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
The method making precast beam termination framework of steel reinforcement model in described step one is first to make two
The tetragon framework of steel reinforcement of consistent size, three faces of two tetragon frameworks of steel reinforcement are respectively
Precast beam termination framework of steel reinforcement model is connected into, in advance with the vertical reinforced-bar-welding of more than two
Beam-ends head framework of steel reinforcement moulded dimension processed is satisfied lies in precast beam by the framework of steel reinforcement of bottom
After on pedestal, all vertical reinforcements are close to precast beam termination and precast beam two coxostermum
Lower position also keeps vertically.
4. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
Precast beam termination framework of steel reinforcement and precast beam termination and precast beam two flank in described step one
The method that plate bottom is fixed and pre-embedded steel slab at the bottom of step 2 middle mold shape steel plate and beam is fixing is
Use adhesive tape sticking.
5. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
Described step 2 middle mold shape steel plate uses thickness to be the steel plate of 1mm to 3mm.
6. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
Precast beam tip position is done bid on pier cap beam or abutment bent cap by described step 3
The precast beam tip position of offer is designed, at abutment bent cap or bridge pier according to the method for note
The mark line of precast beam tip position is transversely marked on bent cap.
7. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
Precast beam tip position is done bid on pier cap beam or abutment bent cap by described step 3
The precast beam tip position of offer is designed, at abutment bent cap or bridge pier according to the method for note
Transversely mark the mark line of precast beam tip position on bent cap, measure the reality of precast beam
Length, is distributed evenly over the bridge at precast beam two ends by the difference of precast beam length Yu design load
On pier capping beam or abutment bent cap, redefine precast beam tip position and change mark line.
8. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
According to model steel Board position, described step 4 determines that the method for bearing pad stone plan-position is
Hang vertical line by being arranged on the perforate placement of model steel plate center, hang vertical line corresponding
Position had both been the center of bearing pad stone, determined bearing pad stone plane according to center
Position.
9. bearing pad stone construction lofting method as claimed in claim 1, it is characterised in that
According to model steel Board position, described step 4 determines that the method for bearing pad stone plan-position is
Place respectively hang vertical line by being arranged on the perforate of four corner positions of model steel plate, according to
Hang vertical line correspondence position on abutment bent cap or pier cap beam and determine the projection of model steel plate
Position, the bearing pad stone size provided further according to design determines bearing pad stone plan-position.
10. bearing pad stone construction lofting method as claimed in claim 1, its feature exists
In, described step 4 also includes the checking procedure to model steel board plane position, specifically
For four angle points of measurement model steel plate to abutment bent cap or the vertical dimension of pier cap beam, root
According to the difference of vertical dimension, the plan-position of bearing pad stone end face is adjusted, make setting-out
Bearing pad stone end face and model steel plate keeping parallelism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585968.XA CN105113418B (en) | 2015-09-15 | 2015-09-15 | A kind of bearing pad stone construction lofting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585968.XA CN105113418B (en) | 2015-09-15 | 2015-09-15 | A kind of bearing pad stone construction lofting method |
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| Publication Number | Publication Date |
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| CN105113418A CN105113418A (en) | 2015-12-02 |
| CN105113418B true CN105113418B (en) | 2016-09-14 |
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| CN201510585968.XA Expired - Fee Related CN105113418B (en) | 2015-09-15 | 2015-09-15 | A kind of bearing pad stone construction lofting method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108755395B (en) * | 2018-02-12 | 2019-09-20 | 浙江大学城市学院 | A kind of spherical bearing installation method |
| CN109024288B (en) * | 2018-07-26 | 2020-01-07 | 中铁大桥局集团有限公司 | Method for erecting steel truss girder by using precast concrete shoveling mat |
| CN110700083A (en) * | 2019-10-14 | 2020-01-17 | 中铁四局集团第二工程有限公司 | Installation measurement control method for prefabricated bridge pier stud |
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| JP2004232214A (en) * | 2003-01-28 | 2004-08-19 | Jfe Koken Corp | Bridge floor slab supporting form and work execution method for bridge floor slab using this form |
| CN103726450A (en) * | 2013-12-26 | 2014-04-16 | 武汉二航路桥特种工程有限责任公司 | Simply-supported slab bridge jack-up method and height-adjustable combined cushion structure applied therein |
| CN104404882A (en) * | 2014-11-19 | 2015-03-11 | 中铁六局集团有限公司 | Assistant mounting die for support and construction method thereof |
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|---|---|---|---|---|
| JP2004232214A (en) * | 2003-01-28 | 2004-08-19 | Jfe Koken Corp | Bridge floor slab supporting form and work execution method for bridge floor slab using this form |
| CN103726450A (en) * | 2013-12-26 | 2014-04-16 | 武汉二航路桥特种工程有限责任公司 | Simply-supported slab bridge jack-up method and height-adjustable combined cushion structure applied therein |
| CN204199170U (en) * | 2014-09-17 | 2015-03-11 | 中国一冶集团有限公司 | Bridge steel support installation pinner |
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