CN102286940B - Construction method for remoulding old pier columns of bridges - Google Patents
Construction method for remoulding old pier columns of bridges Download PDFInfo
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- CN102286940B CN102286940B CN 201110226484 CN201110226484A CN102286940B CN 102286940 B CN102286940 B CN 102286940B CN 201110226484 CN201110226484 CN 201110226484 CN 201110226484 A CN201110226484 A CN 201110226484A CN 102286940 B CN102286940 B CN 102286940B
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Abstract
The invention relates to a construction method and in particular relates to a construction method for remoulding old pier columns of bridges. The construction method at least comprises the following steps: cutting and removing column bodies at the top end parts of the old pier columns, sleeving steel boxes at the upper ends of the old pier columns from which the column bodies at the top end parts are removed, packaging cover plates at the openings on the steel boxes and grouting the gaps between the cover plates and the top ends of the old pier columns via reserved grouting holes on the cover plates. The construction method has the following advantages: the degree of mechanization is high, thus accelerating the construction progress and shortening the blockage time; therefore the construction method has obvious social benefits; and steel boxes are adopted to remould the existing piers, thus meeting the precision requirement and lowering the construction cost, therefore the construction method has obvious social benefits and higher popularization and application values.
Description
Technical field
The present invention relates to job practices.Be specifically related to a kind of job practices that the old pier stud of bridge is transformed that is used for.
Background technology
The subway light rail engineering often needs existing light rail viaduct is transformed because of planning that capacity can not satisfy growing passenger flow needs early stage in the modern city.Because of rebuilding construction can not influence the overhead use of existing light rail for a long time, often need in the limited time, finish rebuilding construction.Usually before the construction rebuilding construction, construction department can only be by constructing to the mode of subway ownership department " main points ", usually the time of will putting is relatively short, finish at short notice new Liang Tidaijiuliang, and track laying very big to satisfy the needs difficulty of construction that is open to traffic.And the city rail engineering is also very high to the required precision of engineering construction.Thereby it is very big to finish the rebuilding construction difficulty at short notice.
In rebuilding construction, the transformation of existing bridge pier is a key link that changes the construction of worker's method.The existing bridge pier transformation of domestic city light rail viaduct does not at present also have similar example at present, only generally adopts lift-up method in the old bridge pier transformation of railway engineering, by the existing bridge of jack jacking, adopts then and cuts off or the mode of spreading is transformed.This method construct consuming time long, expense is huge, construction technology is complicated, the difficult control of construction quality, and construction precision is relatively low, is unsuitable for wanting the improvement project of the old pier stud of city rail that seeking time is short, precision is high to construct.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of bridge job practices that old pier stud is transformed is provided, the steel bushing housing-case that it is good that this method is used customization in advance is contained on the old pier stud, carry out slip casting afterwards, after condensing, slurries can form supporting plane fast, avoid in the prior art construction consuming time long, expense is huge, construction technology is complicated, the difficult control of construction quality, and the relatively low shortcoming of construction precision.
The object of the invention realizes being finished by following technical scheme:
The old pier stud rebuilding construction of a kind of bridge method, it is characterized in that: described job practices comprises following construction sequence at least: cutting removes old pier stud upper edge portion cylinder, is removing the old pier stud upper end suit one steel bushing case of head portion cylinder, encapsulate a cover plate in upper shed place of steel bushing case, carry out slip casting to the slit between cover plate and the old pier stud top by the injected hole of reserving on the cover plate.
The old pier stud rebuilding construction of described a kind of bridge method is characterized in that described steel bushing case is assemblied to form by two steel templates at least.
The old pier stud rebuilding construction of described a kind of bridge method is characterized in that described steel bushing case is assemblied to form by four steel templates.
The old pier stud rebuilding construction of described a kind of bridge method, it is characterized in that described suit steel bushing case step adopts symmetrical mounting means, promptly fixedly mount template, on two sides of residue, fixedly mount template respectively fixedly mounting on any side of old pier stud cylinder on template, the opposite in the side of mounting template, be welded to connect between template and the template, form the closed box structure.
The old pier stud rebuilding construction of described a kind of bridge method is characterized in that the shape of described steel bushing case and old pier stud shape are complementary.
The old pier stud rebuilding construction of described a kind of bridge method is characterized in that bolt is connected and fixed between described cover plate and the steel bushing case.
Advantage of the present invention is: adopt this job practices mechanization degree height, can accelerating construction progress, and shorten blocking time, reduce the influence of construction to existing urban track traffic and surrounding environment, have obvious social.Adopt the steel bushing case to transform existing pier, can satisfy required precision, can reduce construction costs again, have obvious social, application value is higher.
Description of drawings
Fig. 1 is an original old pier stud schematic diagram;
Fig. 2 is excision upper part old pier stud cylinder schematic diagram;
Fig. 3 is an old pier stud schematic diagram after excision is finished;
Fig. 4 is a steel bushing case installation site elevation;
Fig. 5 is a steel bushing case installation site vertical view;
Fig. 6 is the structural representation of steel bushing case;
Fig. 7 is the structural representation of steel bushing cover plate.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
Shown in Fig. 1-12, label 1-15 represents respectively: old pier stud 1, pinner 2, old pier stud excision cylinder 3, old pier stud residue cylinder 4, cut surface 5, steel bushing case 6, injected hole 7, connector 8, connector 9, steel bushing cover plate 10, steel template 11, steel template 12, steel template 13, steel template 14, steel bushing case upper shed 15.
Embodiment: at first excise old pier stud excision cylinder 3 and pinner 2, form old pier stud residue cylinder 4 and cut surface 5.The mode that adopts symmetry to install then remains cylinder 4 upper end suits one steel bushing case 6 at old pier stud, described steel bushing case 6 comprises four steel templates 11,12,13,14, steel template 11 promptly is installed on any side of old pier stud residue cylinder 4, steel template 13 is being installed on the opposite of the side that steel template 11 is installed, on two faces of residue, steel template 12, steel template 14 is being installed successively, formation envelope box structure.Fixedly connected mode between the steel template perhaps is bolt connection etc. for welding.Four steel templates are all passed through connector 8 and are fixedlyed connected with four sides of old pier stud 1 respectively, as bolt connection, crab-bolt connection etc.At steel bushing case upper shed 15 place's encapsulation cover plates 5.Cover plate 5 is fixedlyed connected with steel bushing case 6 by connector 9, as bolt connection, holdfast connection etc.Be installed with injected hole 7 on the cover plate 5 in advance.By the high-strength slurry of reserving on the steel bushing cover plate 5 of injected hole 7 perfusions, fill and lead up the gap between steel bushing case 6 and the old pier stud residue cylinder 4, fill and lead up irregular cut surface 5, and steel bushing case 6 casings and old pier stud residue cylinder 4 are closely fixed.
Present embodiment is in the specific implementation: the steel bushing case 6 of employing can play consolidation effect to old pier stud cylinder to satisfy the stressed and required precision of pier stud.The shape of steel bushing case 6 should be complementary with the shape of old pier stud 1, and promptly old pier stud 1 is a rectangular configuration, and steel bushing case 6 also is a rectangular configuration, and steel bushing case 6 planforms change along with the change of old pier stud 1 shape.Steel bushing case 6 is made up of at least two templates, and its shape, size change along with the change of steel bushing case.When for example transforming circular old pier stud, the steel bushing case can be made of the fan-shaped template of four block size unanimities, also can be made of the semi-circular template of two block size unanimities.
When the steel bushing case was made, the cut surface of steel or surface of shear were answered flawless, slag inclusion, layering and greater than the truncation of 1mm.The steel bushing case should adopt the Q345qD steel plate to process, and when being lower than-12 ℃ in environment temperature, should not carry out gagging and cold bend(ing), should cool off naturally after adding heat straightening.When part adopted thermo forming, heating-up temperature should be controlled at 900～1000 ℃; Dropped to before 800 ℃ in temperature, should finish processing.Steel surface after the rectification do not have tangible concave surface or damage, scratch depth must not be greater than 0.5mm, and should be greater than 1/2 of the negative allowable variation of this thickness of steel product.Anchor hole should be carried out setting-out according to the actual hole of beating of pier stud and be made.The used steel plate specification of steel bushing case must be processed according to the figure paper size, reserves anchor hole and should carry out the setting-out making according to the actual hole of beating of pier stud.
During the pier stud cutting, according to job practices and requirement, need to determine the position of cutting, clearly Qie Ge thickness before the construction.According to line of cut, get out the frame locating hole with Churn drill, beat expansion bolt, frame is installed.According to line of cut, head and chain are installed.Reeve, hang in advance.A cutting machine dismounting and a pier stud that cuts down move post.Adopt abrasive machine to polish to cutting pier stud surface, back, roughness control is in ± 2mm.
During the installation of steel bushing case, adopt the reinforcing bar survey meter that the main reinforce position in the pier stud is verified, and paint and carry out mark.By design drawing requirement unwrapping wire, according to the location crab-bolt, particular location can be according to the principle of dodging the pier stud reinforcement location, according to the on-site actual situations adjustment, and please design affirmation, but crab-bolt spacing, back gauge need satisfy " Code for design of steel structures " (GB50017-2003) requirement.Welding seam will be demanded perfection molten, and surface finish is smooth, and bevel angle and root face size satisfy " construction steel structure solder technology rules " (JGJ81-2002) requirement.Excision beam support pinner is to Dun Ding, the cleaning of polishing, and smear the modified epoxy adhesive at Dun Ding, the safe performance indexes of epoxy resin gluing agent must meet " concrete structure reinforcement design specifications " (GB50367-2006) relevant regulations, mould 4(bolt is installed when blocking at last to be connected), template 4 alignment errors are controlled at ± 2mm in.
Claims (6)
1. the old pier stud rebuilding construction of bridge method, it is characterized in that: described job practices comprises following construction sequence at least: cutting removes old pier stud upper edge portion cylinder, is removing the old pier stud upper end suit one steel bushing case of head portion cylinder, encapsulate a cover plate in upper shed place of steel bushing case, by the injected hole slip casting reserved on the cover plate to the slit between cover plate and the old pier stud top.
2. the old pier stud rebuilding construction of a kind of bridge according to claim 1 method is characterized in that described steel bushing case is assemblied to form by two steel templates at least.
3. the old pier stud rebuilding construction of a kind of bridge according to claim 2 method is characterized in that described steel bushing case is assemblied to form by four steel templates.
4. the old pier stud rebuilding construction of a kind of bridge according to claim 3 method, it is characterized in that described suit steel bushing case step adopts symmetrical mounting means, promptly fixedly mount template, on two sides of residue, fixedly mount template respectively fixedly mounting on any side of old pier stud cylinder on template, the opposite in the side of mounting template, be welded to connect between template and the template, form the closed box structure.
5. the old pier stud rebuilding construction of a kind of bridge according to claim 1 method is characterized in that the shape of described steel bushing case and the old pier stud shape of bridge are complementary.
6. the old pier stud rebuilding construction of a kind of bridge according to claim 1 method is characterized in that bolt is connected and fixed between described cover plate and the steel bushing case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226484 CN102286940B (en) | 2011-08-09 | 2011-08-09 | Construction method for remoulding old pier columns of bridges |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110226484 CN102286940B (en) | 2011-08-09 | 2011-08-09 | Construction method for remoulding old pier columns of bridges |
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| CN102286940A CN102286940A (en) | 2011-12-21 |
| CN102286940B true CN102286940B (en) | 2013-07-24 |
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| CN 201110226484 Active CN102286940B (en) | 2011-08-09 | 2011-08-09 | Construction method for remoulding old pier columns of bridges |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107761580A (en) * | 2017-10-13 | 2018-03-06 | 温州市交通工程咨询监理有限公司 | A kind of old pier stud rebuilding construction scheme of bridge |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979042B (en) * | 2012-12-03 | 2015-07-01 | 河海大学 | Bridge pier connecting device for bridge lifting process and construction method for bridge pier connecting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005307470A (en) * | 2004-04-19 | 2005-11-04 | Ootomi Kensetsu Kk | Foundation reinforcing method for existing bridge pier constructed by well construction method |
| CN101550677A (en) * | 2009-05-08 | 2009-10-07 | 四川路桥建设股份有限公司 | Underwater pier wall cleaning method and movable bracket thereof |
| CN101575858A (en) * | 2009-06-08 | 2009-11-11 | 四川盛大交通科研设计有限公司 | Construction method of steel cofferdam used for reinforcing underwater pier |
| CN101603290A (en) * | 2009-06-25 | 2009-12-16 | 四川路桥建设股份有限公司 | The job practices of concrete used for reinforcing underwater pier |
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2011
- 2011-08-09 CN CN 201110226484 patent/CN102286940B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005307470A (en) * | 2004-04-19 | 2005-11-04 | Ootomi Kensetsu Kk | Foundation reinforcing method for existing bridge pier constructed by well construction method |
| CN101550677A (en) * | 2009-05-08 | 2009-10-07 | 四川路桥建设股份有限公司 | Underwater pier wall cleaning method and movable bracket thereof |
| CN101575858A (en) * | 2009-06-08 | 2009-11-11 | 四川盛大交通科研设计有限公司 | Construction method of steel cofferdam used for reinforcing underwater pier |
| CN101603290A (en) * | 2009-06-25 | 2009-12-16 | 四川路桥建设股份有限公司 | The job practices of concrete used for reinforcing underwater pier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107761580A (en) * | 2017-10-13 | 2018-03-06 | 温州市交通工程咨询监理有限公司 | A kind of old pier stud rebuilding construction scheme of bridge |
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| CN102286940A (en) | 2011-12-21 |
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