CN104695340A - Construction method of shear resistance and strengthening of concrete box beams based on corrugated steel webs - Google Patents
Construction method of shear resistance and strengthening of concrete box beams based on corrugated steel webs Download PDFInfo
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- CN104695340A CN104695340A CN201510066572.4A CN201510066572A CN104695340A CN 104695340 A CN104695340 A CN 104695340A CN 201510066572 A CN201510066572 A CN 201510066572A CN 104695340 A CN104695340 A CN 104695340A
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
Abstract
The invention discloses a construction method of shear resistance and strengthening of concrete box beams based on corrugated steel webs. The construction method successively comprises the following steps: performing construction lofting and positioning on top plates and bottom plates of box beams; performing and strengthening bonding surfaces; drilling anchor bolt holes in the bottom surfaces of the top plates of the box beams; drilling holes and planting steel bars in the top surfaces of the bottom plates of the box beams; performing laying-off on the corrugated steel webs; drilling holes and performing polishing on upper flange plates; welding and mounting the corrugated steel webs; mounting reinforced mesh slices; erecting a model and pouring concrete. The construction method disclosed by the invention has the advantage that the purposes of shear resistance and strengthening of the concrete box beams are achieved by mounting longitudinal corrugated steel web components in box chambers of box beams, increasing the number of webs of the box beams and reducing the main tensile stress of original concrete webs of the box beams.
Description
Technical field
The invention belongs to technical field of bridge engineering, particularly relate to a kind of construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate.
Background technology
At present, one of concrete box-beam bridge main bridge type having become China's Longspan Bridge.But due to aspect Shortcomings or defects such as design, construction and operation management, large span prestressed concrete box girder bridge in-service at present has suitable vast scale to occur Diagonal Crack in Web, directly threatens the durable of bridge and security performance.
Further developing of diagonal crack is had for suppressing web, improve the shear resistance of bridge, existing reinforcement means is included in box girder web affixing steel plate or carbon fiber, stretch-draw vertical prestressing and increases web plate section etc., although this is affixing steel plate or carbon fiber easy construction wherein, but limited for the increase rate of shear-carrying capacity, and affect the attractive in appearance of bridge; Vertical tension pre-stress construction difficulty is comparatively large, and is faced with the problems such as loss of prestress; Increase web plate section and then can roll up bridge deadweight, cause extra load effect to bridge.And above-mentioned three kinds of methods all obviously cannot improve the original shear distributing state of box girder web.
Summary of the invention
The object of the present invention is to provide a kind of construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate, by indulge at case beam case indoor location bridge to Wavelike steel webplate component, increase the web quantity of case beam, subtract the principal tensile stress of the original concrete web of small box girder, thus reach the object of the Shear Strengthening to box girder bridge.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: based on the construction method of the concrete box girder Shear Strengthening of Wavelike steel webplate, carry out according to the following steps successively:
1) construction lofting location is carried out at case back plate and case beam base plate: determine with upper/lower positions by this setting-out: the center line of longitudinal case beam case room, i.e. the center trend of Wavelike steel webplate; The embedding anchor hole position of case back plate; Case beam base plate bar planting position; Rear pouring concrete formwork erection position;
2) bonding surface is reinforced in process: carry out in the reinforcing bonding surface region of case back plate and case beam base plate polishing, clean, dust removal process; The process of concrete dabbing is carried out in the bonding surface region of case beam bottom plate top surface;
3) anchor hole is bored in case back plate bottom surface: in the embedding anchor hole position of case back plate of step 1) setting-out, carry out brill anchor hole to case back plate bottom surface;
4) case beam bottom plate top surface boring, bar planting: in the case beam base plate bar planting position of step 1) setting-out, carry out boring and bar planting to case beam bottom plate top surface;
5) Wavelike steel webplate blanking: Wavelike steel webplate comprises top flange plate, corrugated web and bottom wing listrium, top flange plate, corrugated web and bottom wing listrium piecemeal enter case beam case room by the enter hole of case beam;
6) top flange plate boring, polishing: the anchor hole position of the case back plate bottom surface according to step 3), corresponding hole in top flange plate relevant position, and having holed, the rear contact surface to top flange plate and case back plate bottom surface is polished, processing of rust removing;
7) welding of Wavelike steel webplate, installation: corrugated web is welded assembled with top flange plate, bottom wing listrium in case beam case chamber interior; Top flange plate and case back plate bottom surface are carried out anchor bolts and are fixed, and crab-bolt through the boring of top flange plate and the anchor hole of case back plate bottom surface, is then carried out injecting glue bonding, made adhesion strength reach required standard successively; A side corresponding with case beam base plate on bottom wing listrium is fixedly installed peg;
8) reinforced mesh is installed: one deck reinforced mesh is installed between bottom wing listrium and case beam bottom plate top surface;
9) formwork erection concreting: the rear pouring concrete formwork erection position described in step 1), shuttering concreting.
Described step 2) process reinforce in bonding surface, under the condition of the surface irregularity of the reinforcing bonding surface of case back plate and case beam base plate, adopt the reinforcing bonding surface of epoxy resin mortar to case back plate and case beam base plate to repair.
Described step 9) concrete that uses is slightly expanded concrete.
Described step 3) case back plate bottom surface bore in anchor hole, first by reinforced concrete protective layer tester, case back plate is detected, then bores anchor hole.
Described step 4) the boring of case beam bottom plate top surface, in bar planting, first can be detected case beam base plate by reinforced concrete protective layer tester, then hole.
The invention has the advantages that this reinforced construction method by indulge at case beam case indoor location bridge to Wavelike steel webplate component, increase the web quantity of case beam, subtract the principal tensile stress of the original concrete web of small box girder, thus the Shear Strengthening reached box girder bridge, this construction method can avoid the adverse effect that the drafting error of Wavelike steel webplate height brings simultaneously; The use of reinforced concrete protective layer tester, can detect inside concrete bar diameter, position, reinforcing bar distribution and concrete cover to reinforcement thickness, be convenient to punching; The use of slightly expanded concrete, compensate for concrete contraction, reaches control distress in concrete, improves the object of concrete performance; Structure of the present invention and structure stress are clear and definite, easy construction, dependable performance, the Shear Strengthening of concrete box-beam bridge and prestressed concrete box-beam bridge when can realize different case number of chambers amount and different cross section form (uniform section and variable cross-section).
Accompanying drawing explanation
Fig. 1 is standard section schematic diagram of the present invention;
Fig. 2 is A-A sectional schematic diagram in Fig. 1;
Fig. 3 is B-B sectional schematic diagram in Fig. 1;
Fig. 4 is C-C sectional schematic diagram in Fig. 1.
The Reference numeral of each parts in figure: 1-case beam, 2-case back plate, 3-case beam base plate, 4-case beam case room, 12-crab-bolt, 13-top flange plate, 14-corrugated web, 15-bottom wing listrium, 16-peg, 17-reinforced mesh, 18-post-installing rebar, 19-after-pouring slightly expanded concrete.
Detailed description of the invention
In the present embodiment, crab-bolt 12 selects chemical anchor bolts, shown in composition graphs 1 to Fig. 4, and the construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate of the present invention, carry out according to the following steps successively:
1) construction lofting location is carried out at case back plate 2 and case beam base plate 3: determine with upper/lower positions by this setting-out: the center line of longitudinal case beam case room 4, i.e. the center trend of Wavelike steel webplate; The embedding anchor hole position of case back plate; Case beam base plate bar planting position; Rear pouring concrete formwork erection position;
2) bonding surface is reinforced in process: carry out in the reinforcing bonding surface region of case back plate 2 and case beam base plate 3 polishing, clean, dust removal process, under the serious rough condition in surface of the reinforcing bonding surface of case back plate 2 and case beam base plate 3, the reinforcing bonding surface of epoxy resin mortar to case back plate 2 and case beam base plate 3 can be adopted to repair; The process of concrete dabbing is carried out in the bonding surface region of case beam base plate 3 end face;
3) anchor hole is bored in case back plate 2 bottom surface: in the embedding anchor hole position of case back plate of step 1) setting-out, by reinforced concrete protective layer tester (reinforced concrete protective layer tester is prior art), case back plate 2 is detected, and then brill anchor hole is carried out to case back plate 2 bottom surface;
4) case beam base plate 3 end face boring, bar planting: in the case beam base plate bar planting position of step 1) setting-out, by reinforced concrete protective layer tester (reinforced concrete protective layer tester is prior art), case beam base plate 3 is detected, and then case beam base plate 3 end face is holed and implanted reinforcing bar, form post-installing rebar 18;
5) Wavelike steel webplate blanking: Wavelike steel webplate comprises top flange plate 13, corrugated web 14 and bottom wing listrium 15, top flange plate 13, corrugated web 14 and bottom wing listrium 15 piecemeal enter case beam case room 4 by the enter hole of case beam 1;
6) top flange plate 13 is holed, is polished: anchor hole position is bored in the case back plate bottom surface according to step 3), corresponding to hole in top flange plate 13 relevant position, holed rear to top flange plate 13 is polished with the contact surface of case back plate 2 bottom surface, processing of rust removing;
7) welding of Wavelike steel webplate, installation: corrugated web 14 is welded assembled with top flange plate 13, bottom wing listrium 15 in inside, case beam case room 4, wherein top flange plate 13 welds with corrugated web 14, corrugated web 14 welds with bottom wing listrium 15; Top flange plate 13 and case back plate 2 bottom surface are carried out anchor bolts and are fixed, and crab-bolt 12 through the boring of top flange plate 13 and the anchor hole of case back plate 2 bottom surface, is then carried out injecting glue bonding, made adhesion strength reach required standard successively; A side corresponding with case beam base plate 3 on bottom wing listrium 15 is welded to connect peg 16;
8) reinforced mesh is installed: between bottom wing listrium 15 and case beam base plate 3 end face, one deck reinforced mesh 17 is installed and strengthens;
9) formwork erection concreting: the rear pouring concrete formwork erection position described in step 1), shuttering also builds slightly expanded concrete formation after-pouring slightly expanded concrete 19, it is inner that described peg 16 and reinforced mesh 17 are embedded in after-pouring slightly expanded concrete 19, bottom wing listrium 15 is connected with after-pouring slightly expanded concrete 19 by peg 16, case beam base plate 3 is connected with after-pouring slightly expanded concrete 19 by post-installing rebar 18.
By above-mentioned reinforced construction method, case back plate 2 is connected by crab-bolt 12 with top flange plate 13, top flange plate 13 adopts welding manner to be connected with corrugated web 14, corrugated web 14 also adopts welding manner to be connected with bottom wing listrium I-5, frange plate 15 is connected by peg 16 with after-pouring slightly expanded concrete 19, after-pouring slightly expanded concrete 19 is connected by post-installing rebar 18 with case beam base plate 3, completes the Shear Strengthening of concrete box girder.
The invention has the advantages that this reinforced construction method by install case beam case room 4 in vertical bridge to Wavelike steel webplate component, the web quantity of increase case beam 1, subtracts the principal tensile stress of the original concrete web of small box girder 1, thus reaches the Shear Strengthening to box girder bridge; Structure of the present invention and structure stress are clear and definite, easy construction, dependable performance, the Shear Strengthening of concrete box-beam bridge and prestressed concrete box-beam bridge when can realize different case number of chambers amount and different cross section form (uniform section and variable cross-section).
Above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: still can modify to the present invention or equivalent replacement, and not departing from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1., based on the construction method of the concrete box girder Shear Strengthening of Wavelike steel webplate, it is characterized in that carrying out according to the following steps successively:
1) construction lofting location is carried out at case back plate and case beam base plate: determine with upper/lower positions by this setting-out: the center line of longitudinal case beam case room, i.e. the center trend of Wavelike steel webplate; The embedding anchor hole position of case back plate; Case beam base plate bar planting position; Rear pouring concrete formwork erection position;
2) bonding surface is reinforced in process: carry out in the reinforcing bonding surface region of case back plate and case beam base plate polishing, clean, dust removal process; The process of concrete dabbing is carried out in the bonding surface region of case beam bottom plate top surface;
3) anchor hole is bored in case back plate bottom surface: in the embedding anchor hole position of case back plate of step 1) setting-out, carry out brill anchor hole to case back plate bottom surface;
4) case beam bottom plate top surface boring, bar planting: in the case beam base plate bar planting position of step 1) setting-out, carry out boring and bar planting to case beam bottom plate top surface;
5) Wavelike steel webplate blanking: Wavelike steel webplate comprises top flange plate, corrugated web and bottom wing listrium, top flange plate, corrugated web and bottom wing listrium piecemeal enter case beam case room by the enter hole of case beam;
6) top flange plate boring, polishing: the anchor hole position of the case back plate bottom surface according to step 3), corresponding hole in top flange plate relevant position, and having holed, the rear contact surface to top flange plate and case back plate bottom surface is polished, processing of rust removing;
7) welding of Wavelike steel webplate, installation: corrugated web is welded assembled with top flange plate, bottom wing listrium in case beam case chamber interior; Top flange plate and case back plate bottom surface are carried out anchor bolts and are fixed, and crab-bolt through the boring of top flange plate and the anchor hole of case back plate bottom surface, is then carried out injecting glue bonding, made adhesion strength reach required standard successively; A side corresponding with case beam base plate on bottom wing listrium is fixedly installed peg;
8) reinforced mesh is installed: one deck reinforced mesh is installed between bottom wing listrium and case beam bottom plate top surface;
9) formwork erection concreting: the rear pouring concrete formwork erection position described in step 1), shuttering concreting.
2. the construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate according to claim 1, it is characterized in that: described step 2) process reinforce in bonding surface, under the condition of the surface irregularity of the reinforcing bonding surface of case back plate and case beam base plate, the reinforcing bonding surface of epoxy resin mortar to case back plate and case beam base plate is adopted to repair.
3. the construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate according to claim 1 and 2, is characterized in that: described step 9) concrete that uses is slightly expanded concrete.
4. the construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate according to claim 1; it is characterized in that: described step 3) case back plate bottom surface bore in anchor hole; first by reinforced concrete protective layer tester, case back plate is detected, then bore anchor hole.
5. the construction method of the concrete box girder Shear Strengthening based on Wavelike steel webplate according to claim 1; it is characterized in that: described step 4) the boring of case beam bottom plate top surface, in bar planting; first can be detected case beam base plate by reinforced concrete protective layer tester, then hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510066572.4A CN104695340B (en) | 2015-02-09 | 2015-02-09 | The construction method of concrete box girder Shear Strengthening based on Wavelike steel webplate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510066572.4A CN104695340B (en) | 2015-02-09 | 2015-02-09 | The construction method of concrete box girder Shear Strengthening based on Wavelike steel webplate |
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| CN104695340A true CN104695340A (en) | 2015-06-10 |
| CN104695340B CN104695340B (en) | 2016-08-24 |
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| CN108824221B (en) * | 2018-06-22 | 2019-09-20 | 长沙理工大学 | Concrete continuous girder bridge web replacing and reinforcing method based on corrugated sheet steel |
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| KR100733609B1 (en) * | 2006-03-31 | 2007-06-28 | 주식회사 제일엔지니어링 | Reinforcing method of concrete structures using camber of steel beam |
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| CN102535357A (en) * | 2012-02-21 | 2012-07-04 | 中南大学 | Method for strengthening double-T bridge composite structure for railway |
| CN102535355A (en) * | 2012-02-21 | 2012-07-04 | 朔黄铁路发展有限责任公司 | Method for reinforcing bridge structure separated steel-concrete combined truss |
| CN102561213A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate-concrete composite structure reinforcement method of structural negative moment region |
| CN102561214A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate and concrete composite structure reinforcing method for positive bending moment area |
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2015
- 2015-02-09 CN CN201510066572.4A patent/CN104695340B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100733609B1 (en) * | 2006-03-31 | 2007-06-28 | 주식회사 제일엔지니어링 | Reinforcing method of concrete structures using camber of steel beam |
| JP2010265696A (en) * | 2009-05-15 | 2010-11-25 | Sho Bond Constr Co Ltd | Structure and method for reinforcing concrete floor slab |
| CN102561213A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate-concrete composite structure reinforcement method of structural negative moment region |
| CN102561214A (en) * | 2012-02-15 | 2012-07-11 | 中南大学 | Steel plate and concrete composite structure reinforcing method for positive bending moment area |
| CN102535357A (en) * | 2012-02-21 | 2012-07-04 | 中南大学 | Method for strengthening double-T bridge composite structure for railway |
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