CN103437304A - Method for changing pot bearing by enlarging pier section - Google Patents

Method for changing pot bearing by enlarging pier section Download PDF

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Publication number
CN103437304A
CN103437304A CN2013103980295A CN201310398029A CN103437304A CN 103437304 A CN103437304 A CN 103437304A CN 2013103980295 A CN2013103980295 A CN 2013103980295A CN 201310398029 A CN201310398029 A CN 201310398029A CN 103437304 A CN103437304 A CN 103437304A
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CN
China
Prior art keywords
pier
jack
bearing
increases
changed
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Application number
CN2013103980295A
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Chinese (zh)
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CN103437304B (en
Inventor
周明珲
张锐
周科文
芮宝东
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北京中交桥宇科技有限公司
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Priority to CN201310398029.5A priority Critical patent/CN103437304B/en
Publication of CN103437304A publication Critical patent/CN103437304A/en
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Publication of CN103437304B publication Critical patent/CN103437304B/en

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Abstract

The invention relates to the technical field of bridge engineering, and especially relates to a method for changing a pot bearing by enlarging a pier section. The method comprises the following steps: 1, enlarging the pier top section within a certain height range of the pier; 2, placing a lifting jack on the pier top with an enlarged section to jack the beam body, then, temporarily supporting the beam by a steel washer block, and taking out the lifting jack; 3, detaching the pot bearing at the pier top, leveling the bottom surface of the beam body, pasting wedge-shaped steel plates with concrete and adhesives, and fixing and limiting the steel plates by angle steels around; 4, pouring a cushion at the pier top; 5, setting two plate type rubber bearings in parallel on the pier top, supporting the beam body by the lifting jack, detaching the temporarily supporting steel washer block, laying down the beam, removing the lifting jack away, and finishing the change work. The method is free from building a temporary support for supporting the beam body, the pot bearing can be changed again very conveniently after being changed, traffic cannot be interrupted during construction, social influence is reduced greatly, the economic efficiency is high, harm to the original structure is extremely low, and the carrying capacity of corresponding components is improved further.

Description

A kind of method that increases bridge pier cross section replacing pot bearing
Technical field
The present invention relates to technical field of bridge engineering, relate in particular to a kind of method that pot bearing is changed in the bridge pier cross section that increases.
Background technology
The Main Function of bearing is the bearing reaction of transmitting superstructure, comprises vertical force and horizontal force, guarantees the Free Transform of structure under the factor effects such as mobile load, variations in temperature, concrete shrinkage and creep simultaneously.On existing many bridges, because product quality, design are selected, the factor of the aspects such as construction and installation and maintenance, serious problem and hidden danger appear in a large amount of pot bearings, and pot bearing all needs to be connected with concrete by reinforcing bar or crab-bolt due to upper and lower steel plate, change comparatively difficulty of relatively board-like bearing.
Existing replacing method commonly used:
Method one: directly jacking is replaced by new pot bearing.
According to the construction technology of changing pot bearing, need more than jacking 5cm just to have construction operation space with changing, and the independent jack-up of general bridge Dun Ding highly only allows that jacking is no more than 1.5cm, can't be by the independent jack-up of Dun Ding, carrying out and change, this just need to be changed by synchronization of jacking up one, construct so very difficult, and this method replacing cost is high.
Method two: replace with steel plate
The bearing lower steel plate is motionless, will after beam body jack-up 0.5-1.0cm, upper steel plate be laid down, and by the levelling of beam body, then by upper steel plate by concrete in conjunction with glue at Liang Tishang.The method is intact to bearing, just due at the bottom of beam not the pot bearing of leveling be suitable for, but the bearing of a lot of bridges is not because the construction and installation error causes, but because the problems such as quality can not be used fully, must be changed, so method scope of application limited is not suitable for the serious pot bearing of disease, and, because steel plate is by being combined with concrete in conjunction with this organic material of glue, whether its durability can support carriers also remain to be proved service life.
Summary of the invention
It is low that technical problem to be solved by this invention is to provide a kind of operating expenses, and the method for pot bearing is changed in applicable wide increase bridge pier cross section.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of method that increases bridge pier cross section replacing pot bearing comprises the following steps:
Step 1 increases the pier top section in the certain altitude scope of pier top;
Step 2, the jack jack up girder is placed on Dun Ding plane after increasing section, then with steel cushion block temporary supporting beam body and take out jack;
Step 3, the pot bearing of dismounting Dun Ding, the bottom surface of leveling beam body, use concrete in conjunction with the glue wedge-shaped steel plate in the bottom surface of beam body, and fixing spacing with angle steel around;
Step 4, build the pinner of laminated rubber bearing in the pier top casting;
Step 5, the position that is provided with pot rubber bearing at Dun Dingyuan is set up in parallel two laminated rubber bearings, and jack holds up the beam body, removes the steel cushion block of temporary support, and the beam that falls, remove jack, completes replacing.
The invention has the beneficial effects as follows: do not need newly to set up the temporary supporting girder, after being replaced by laminated rubber bearing, change again next time very convenient simple, directly the Dun Ding after the utilization increase does supporting surface jack-up beam body and can easily replace laminated rubber bearing, without suspending traffic, facilitates vehicle to occur, greatly reduce social influence and indirectly increased economic benefit, better economy, minimum to the injury of original structure, whole construction technology has further improved the supporting capacity of respective members.
On the basis of technique scheme, the present invention can also do following improvement.
Further, in described step 1, the method for the cross section of Dun Ding by bar planting, concreting increases.
Adopt the beneficial effect of above-mentioned further scheme to be: bar planting, concreting are the technology of comparative maturity in construction work, can effectively guarantee the quality of construction.
Further, in described step 1, at the pre-buried spacer bars of pier stud augmenting portion of Dun Ding, a described spacer bars part is inserted in described pier stud augmenting portion, and a part is stretched out the upper surface of described pier stud augmenting portion.
Adopt the beneficial effect of above-mentioned further scheme to be: embedded bar on the cross section increased, can avoid the pinner of the pouring in subsequent step to be moved.
Further, in described step 2, the height of jack jack up girder is 0.5cm-1.0cm.
Adopt the beneficial effect of above-mentioned further scheme to be: beam body jacking 0.5cm-1.0cm is avoided to the too high secondary injury to the beam body of jack-up.
Further, the angle steel in described step 3 can be connected with the beam body by crab-bolt in the position that construction space is arranged.
Adopt the beneficial effect of above-mentioned further scheme to be: the position of stationary wedge steel plate, avoid wedge-shaped steel plate to be moved in the process of construction and later stage bridge operation.
Further, in described step 4, the height of the height of the pinner of laminated rubber bearing by former pot bearing deducts rear plan and adopts the height of laminated rubber bearing and the height of wedge shape leveling bloom to determine.
Adopt the beneficial effect of above-mentioned further scheme to be: height and collimation that assurance replacing pot bearing completes back rest body do not change on original basis.
Further, the pinner of described laminated rubber bearing adopts the epoxy concrete pouring to form.
Adopt the beneficial effect of above-mentioned further scheme to be: epoxy concrete hardness is large, wear-resisting, and cost performance is high, the application life of using epoxy concrete can effectively improve pinner.
The accompanying drawing explanation
Fig. 1 is a kind of flow chart that increases the method for bridge pier cross section replacing pot bearing of the present invention;
Fig. 2 is a kind of schematic diagram that increases the spacing angle steel of leveling wedge shape bloom that the method for changing pot bearing in the bridge pier cross section used of the present invention;
Fig. 3 is a kind of constructed superstructure schematic diagram of rear abutment of the method for changing pot bearing in the bridge pier cross section that increases of the present invention.
In accompanying drawing, the list of parts of each label representative is as follows:
1, former pier stud, 2, the pier stud augmenting portion, 3, angle steel, 4, wedge-shaped steel plate, 5, crab-bolt, 6, pinner, 7, laminated rubber bearing, 8, spacer bars, 9, steel form.
The specific embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
As shown in Figure 1, a kind of method that pot bearing is changed in the bridge pier cross section that increases of the present invention comprises the following steps:
Step 1 S01, increase the pier top section in the certain altitude scope of the pier top of original pier stud 1, the pier stud augmenting portion 2 of Dun Ding increases by the method for bar planting, concreting, pre-buried spacer bars 8 in the pier stud augmenting portion, described spacer bars 8 parts are inserted in described pier stud augmenting portion, a part is stretched out the upper surface of described pier stud augmenting portion, for the pinner 6 of the pouring of avoiding subsequent step, is moved;
Step 2 S02, jack is placed on the Dun Ding plane of the pier stud augmenting portion 2 after increasing section, by beam body jacking 0.5cm-1.0cm, then with steel cushion block temporary supporting beam body and take out jack;
Step 3 S03, the pot bearing of dismounting Dun Ding, the bottom surface of leveling beam body, use concrete in conjunction with glue wedge-shaped steel plate 4 in the bottom surface of beam body, and fixing spacing with angle steel 3 around, and angle steel 3 can be connected with the beam body by crab-bolt 5 in the position that construction space is arranged;
Step 4 S04, height by former pot bearing deducts the height that height that rear plan adopts the height of laminated rubber bearing and wedge shape leveling bloom is determined the pinner 6 of laminated rubber bearing 7, utilize 9 pairs of pinners of steel form, 6 limit types, and adopt epoxy concrete to build pinner 6;
Step 5 S05, the position that is provided with pot rubber bearing at Dun Dingyuan is set up in parallel two laminated rubber bearings 7, described two laminated rubber bearings 7 lay respectively at the both sides of the center line of former pot bearing, and the center line symmetry of two laminated rubber bearing 7 former pot bearings, hold up the beam body about jack, remove the steel cushion block of temporary support, beam falls, remove jack, complete replacing.
The present invention has following advantage than prior art:
(1) do not need newly to set up the temporary supporting girder, save economical and construct simple.
(2) the beam body only needs about jack-up 0.5cm can take out former pot bearing to get final product, avoid the too high secondary injury to the beam body of jack-up.
(3) bearing all has certain service life, after being replaced by laminated rubber bearing, changes next time very convenient simply again, directly utilizes Dun Ding after increasing to be supporting surface jack-up beam body 0.5cm and can easily replace laminated rubber bearing.
(4) without suspending traffic, facilitate vehicle to occur, greatly reduce social influence and indirectly increased economic benefit; Owing to being to bridge pier but not the beam body carries out the increasing section reinforcing, on bridge, the current of vehicle can be ignored to newly-increased concrete disturbance; The top lifting height of beam body own is 0.5cm only also, can under the prerequisite be open to traffic, be constructed fully.
(5) better economy, and the more economy of the longer number of bridge and benefit better.
(6) minimum to the injury of original structure, whole construction technology has further improved the supporting capacity of respective members.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. one kind increases the method that pot bearing is changed in the bridge pier cross section, it is characterized in that, comprises the following steps:
Step 1 increases the pier top section in the certain altitude scope of pier top;
Step 2, the jack jack up girder is placed on Dun Ding plane after increasing section, then with steel cushion block temporary supporting beam body and take out jack;
Step 3, the pot bearing of dismounting Dun Ding, the bottom surface of leveling beam body, use concrete in conjunction with the glue wedge-shaped steel plate in the bottom surface of beam body, and fixing spacing with angle steel around;
Step 4, build the pinner of laminated rubber bearing in the pier top casting;
Step 5, the position that is provided with pot rubber bearing at Dun Dingyuan is set up in parallel two laminated rubber bearings, and jack holds up the beam body, removes the steel cushion block of temporary support, and the beam that falls, remove jack, completes replacing.
2. a kind of method that pot bearing is changed in the bridge pier cross section that increases according to claim 1, is characterized in that, in described step 1, the cross section of Dun Ding increases by the method for bar planting, concreting.
3. a kind of method that pot bearing is changed in the bridge pier cross section that increases according to claim 1 and 2, it is characterized in that, in described step 1 at the pre-buried spacer bars of pier stud augmenting portion of Dun Ding, a described spacer bars part is inserted in described pier stud augmenting portion, and a part is stretched out the upper surface of described pier stud augmenting portion.
4. a kind of method that pot bearing is changed in the bridge pier cross section that increases according to claim 1, is characterized in that, in described step 2, the height of jack jack up girder is 0.5cm-1.0cm.
5. a kind of method that pot bearing is changed in the bridge pier cross section that increases according to claim 1, is characterized in that, the angle steel in described step 3 is connected with the beam body by crab-bolt in the position that construction space is arranged.
6. a kind of method that pot bearing is changed in the bridge pier cross section that increases according to claim 1, is characterized in that, the pinner of described laminated rubber bearing adopts the epoxy concrete pouring to form.
CN201310398029.5A 2013-09-04 2013-09-04 A kind of method increasing pier section replacing pot bearing CN103437304B (en)

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Application Number Priority Date Filing Date Title
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CN103437304B CN103437304B (en) 2016-04-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109629461A (en) * 2019-01-14 2019-04-16 中交公局第六工程有限公司 A method of it does not break off a friendship and carries out cast-in-situ box girder reset and bearing replacement
CN110158490A (en) * 2019-06-04 2019-08-23 中铁九局集团第七工程有限公司 Continuous beam synchronization of jacking up construction
CN110468725A (en) * 2019-08-30 2019-11-19 中铁六局集团太原铁路建设有限公司 Installation engineering method after swivel bridges abutment pier support

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10252016A (en) * 1997-03-14 1998-09-22 Oriental Constr Co Ltd Method for replacing bearing device
CN201553992U (en) * 2009-12-17 2010-08-18 杭州市市政工程集团有限公司 Device for jacking whole body of box girder
CN101906754A (en) * 2010-07-09 2010-12-08 清华大学 Rigid connection method for steel beam and concrete pier
CN102518050A (en) * 2011-12-29 2012-06-27 江苏华通工程检测有限公司 Operation platform for replacing support saddle of bridge
CN102605722A (en) * 2012-03-23 2012-07-25 陈兴冲 Method for seismic reinforcement of pier by the aid of reinforced concrete cover
KR101214531B1 (en) * 2012-11-12 2013-01-09 (주)우암건설 A lifting apparatus of upper structure of bridge and lifting method of upper structure of bridge by using

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10252016A (en) * 1997-03-14 1998-09-22 Oriental Constr Co Ltd Method for replacing bearing device
CN201553992U (en) * 2009-12-17 2010-08-18 杭州市市政工程集团有限公司 Device for jacking whole body of box girder
CN101906754A (en) * 2010-07-09 2010-12-08 清华大学 Rigid connection method for steel beam and concrete pier
CN102518050A (en) * 2011-12-29 2012-06-27 江苏华通工程检测有限公司 Operation platform for replacing support saddle of bridge
CN102605722A (en) * 2012-03-23 2012-07-25 陈兴冲 Method for seismic reinforcement of pier by the aid of reinforced concrete cover
KR101214531B1 (en) * 2012-11-12 2013-01-09 (주)우암건설 A lifting apparatus of upper structure of bridge and lifting method of upper structure of bridge by using

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109629461A (en) * 2019-01-14 2019-04-16 中交公局第六工程有限公司 A method of it does not break off a friendship and carries out cast-in-situ box girder reset and bearing replacement
CN110158490A (en) * 2019-06-04 2019-08-23 中铁九局集团第七工程有限公司 Continuous beam synchronization of jacking up construction
CN110468725A (en) * 2019-08-30 2019-11-19 中铁六局集团太原铁路建设有限公司 Installation engineering method after swivel bridges abutment pier support

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Inventor after: Zhang Rui

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