CN204475188U - Full framing on a kind of old bridge pier - Google Patents
Full framing on a kind of old bridge pier Download PDFInfo
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- CN204475188U CN204475188U CN201520088356.5U CN201520088356U CN204475188U CN 204475188 U CN204475188 U CN 204475188U CN 201520088356 U CN201520088356 U CN 201520088356U CN 204475188 U CN204475188 U CN 204475188U
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- 238000009432 framing Methods 0.000 title claims abstract description 39
- 229920001971 elastomer Polymers 0.000 claims abstract description 31
- 238000011065 in-situ storage Methods 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 38
- 230000005484 gravity Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000004567 concrete Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009411 base construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses the full framing on a kind of old bridge pier, it can the median strip between existing double width old bridge assist viaduct to build, its structure comprises pier, bridge deck, strip foundation, portal support, box beam bracket and cast-in-situ box girder etc., when the pier of old bridge can bear the load of full framing and bridge deck can not meet load, can make full use of the supporting capacity of pier, avoiding can not the bridge deck of bearing load; Meanwhile, also without the need to squeezing into the temporary base of steel pipe pile and so on again to set up full framing in median strip, avoid the trouble of building and removing; In addition, the pier top of old bridge and the bottom surface touching position of strip foundation arrange rubber strip, cast-in-situ box girder, box beam bracket, portal support and strip foundation is made synchronously to sink and not tilt, ensure that full framing structural safety is stablized, owing to taking full advantage of the condition of job site, suit measures to local conditions to set up, therefore there is simple structure, easy to use, economical rationality, the advantage such as safe and reliable.
Description
Technical field
The utility model relates to a kind of field of bridge construction, refers in particular to the cast-in-situ box girder full framing that a kind of old bridge pier is set up.
Background technology
Viaduct is built in median strip, existing double width road surface, and be the common method that current highway and urban road improve the traffic capacity, the cast-in-situ box girder of viaduct also generally adopts full framing.When existing double width road surface is bridge floor, the full framing of viaduct cast-in-situ box girder needs to set up on existing bridge floor and old bridge.Old bridge pavement sets up full framing, the pier of old bridge and the bearing capacity of bridge deck must be checked.This has several possible situation: one is the force request that the pier of old bridge and bridge deck meet full framing, and can directly set up on old bridge during construction full framing, this is easier and economic constructure scheme.Two is that the pier of old bridge and bridge deck all can not meet the demands, this needs to take other modes to set up full framing, as squeezed into the temporary base of steel pipe pile and so in the median strip of double width old bridge, on this kind of temporary base, set up full framing again, after viaduct construction of cast-in-situ box-beam completes, remove temporary base; Or the method adopting above-mentioned first method and second method to combine, namely squeeze into the method for the temporary base shared full framing load of steel pipe pile and so in the pier of old bridge and bridge deck and double width old bridge median strip.Three is loads that the pier of old bridge can bear full framing, and bridge deck can not meet the load of full framing, now need to compare through technical economic analysis, select the scheme of other optimums, to reach technical feasibility, economical rationality, safe and reliable object.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the defect of prior art and provides the full framing on a kind of simple structure, easy to use, economical rationality, safe and reliable old bridge pier.
Technical problem of the present utility model is achieved through the following technical solutions:
Full framing on a kind of old bridge pier, the median strip comprising double width old bridge and be reserved between double width old bridge, the many bridge deck that every width old bridge is laid on pier by multiple pier and level are formed, and the median strip place between described double width old bridge builds case beam pier stud; The strip foundation across being cast in two pier end faces and Duo Gen bridge deck end face is equipped with between often adjacent two piers of described double width old bridge, often between adjacent two strip foundations, portal support is installed, and box beam bracket is set up on portal support, cast-in-situ box girder is built in the median strip place case beam pier stud top casting on this box beam bracket.
The pier top of described old bridge is provided with two stage steps, and subordinate's end face of this two stage steps places neoprene bearing, and one end of described bridge deck is shelved on this neoprene bearing, and higher level's end face of two stage steps is equal with bridge deck end face; On higher level's end face that described strip foundation bottom surface is cast in two stage steps and Duo Gen bridge deck end face, reserved rectangular apertures between this strip foundation bottom surface and higher level's end face of two stage steps, and rubber strip is placed in rectangular apertures.
The rubber strip characteristic of higher level's end face contact position of described strip foundation bottom surface and two stage steps and choosing of size, be related to portal support and the stressed stability of box beam bracket; Described in cast-in-situ box girder, box beam bracket, portal support and strip foundation under gravity and working load effect, the decrement of the neoprene bearing supplying bridge deck one end to shelve must be identical with the decrement of rubber strip, and this rubber strip and choosing of neoprene bearing need meet following formula:
Formula one,
In formula,
---every cast-in-situ box girder, box beam bracket, portal support and strip foundation suffered by root strip foundation from the active force of gravity and working load, by finite element software calculate (
);
---power suffered by rubber strip (
);
---power suffered by neoprene bearing (
);
---higher level's end face width of the two stage steps at pier top (
);
---subordinate's end face width of the two stage steps at pier top (
);
---the overall width of the upper and lower level end face of pier top two stage steps, namely strip foundation width (
);
Formula two,
In formula
---rubber strip area (
);
---rubber strip thickness (
);
---rubber strip modulus of elasticity (
);
---the neoprene bearing gross area (
), the neoprene bearing shelved for bridge deck one end is generally multiple, and the neoprene bearing gross area equals the quantity that single neoprene bearing area is multiplied by neoprene bearing;
---neoprene bearing thickness (
);
---neoprene bearing modulus of elasticity (
);
---higher level's end face width of the two stage steps at pier top (
);
---subordinate's end face width of the two stage steps at pier top (
).
Described strip foundation is reinforced concrete structure, its length 1 ~ 2m longer than the overall width of box beam bracket, width is identical with the end face width of old bridge pier, and its structure stress meets cast-in-situ box girder, box beam bracket, portal support and the strip foundation active force from gravity and working load
requirement.
The portal frame construction that described portal support is set up jointly by horizontal Bailey beam, longitudinal Bailey beam and channel-section steel, the width 0.5 ~ 1m wider than box beam bracket of this portal support.
Described box beam bracket is made up of bowl fastening type support or portal support component.
Described cast-in-situ box girder is supported by the case beam pier stud that many are carried in ground, and the position of every root case beam pier stud all needs the pier avoiding old bridge to arrange.
Compared with prior art, the utility model has the following advantages: viaduct is built in the median strip between the double width road surface of existing double width old bridge, when the pier of old bridge can bear the load of full framing and bridge deck can not meet the load of full framing, make full use of the supporting capacity of old bridge pier, avoiding can not the old bridge pavement plate of bearing load; Meanwhile, do not need the temporary base squeezing into steel pipe pile and so in median strip, then set up full framing on this kind of temporary base, avoid man-hour and the expense of temporary base construction and dismounting; In addition, at the pier top of old bridge and the bottom surface touching position of strip foundation, rubber strip is set, cast-in-situ box girder, box beam bracket, portal support and strip foundation is made synchronously to sink and not tilt, thus ensure that whole full framing structural safety is stablized, this cast-in-situ box girder full framing set up on old bridge pier can make full use of the condition of job site, set up on old bridge pier with suiting measures to local conditions, therefore there is simple structure, easy to use, economical rationality, the advantage such as safe and reliable.
Accompanying drawing explanation
Fig. 1 is facade structures schematic diagram of the present utility model.
Fig. 2 is the lateral plan of Fig. 1.
Fig. 3 is the Force Calculation figure of rubber strip.
Detailed description of the invention
To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.
As shown in Fig. 1 ~ Fig. 3,1. pier, 2. bridge deck, 21. neoprene bearings, 3. strip foundation, 31. rubber strips, 4. portal support, 41. horizontal Bailey beams, 42. longitudinal Bailey beams, 43. channel-section steels, 5. box beam bracket, 6. cast-in-situ box girder, 61. casees beam pier studs.
Full framing on a kind of old bridge pier, as shown in Figure 1 and Figure 2, it is a kind of full framing setting up cast-in-situ box girder 6 on the pier of old bridge, its objective is in order to viaduct is built in more convenient, economic, reasonable, the safe median strip between the double width road surface of existing double width old bridge.
Described old bridge refers to the existing road twin decks that the many bridge deck 2 be laid on pier by multiple pier 1 and level are formed, cause is in order to distinguish for the purpose of newly-built viaduct, therefore claim existing pier 1 and bridge deck 2 to be old bridge, and median strip is reserved between double width old bridge, i.e. between the twin decks of double width old bridge; Described viaduct is the traffic capacity in order to improve road and is built in median strip place, median strip place between double width old bridge builds case beam pier stud 61, and the cast-in-situ box girder 6 of this viaduct is constructed and must be set up that full framing is cast-in-place to be supported on case beam pier stud 61.
The strip foundation 3 across being cast in two pier end faces and Duo Gen bridge deck 2 end face is equipped with between often adjacent two piers 1 of described double width old bridge, it arranges structure: pier 1 top of old bridge is provided with two stage steps, subordinate's end face of this two stage steps places neoprene bearing 21, one end of many bridge deck 2 will be shelved on this neoprene bearing 21, higher level's end face of two stage steps is equal with bridge deck 2 end face, therefore on strip foundation 3 bottom surface higher level's end face that the transverse direction along old bridge is directly cast in two stage steps and Duo Gen bridge deck 2 end face, so that twin decks pier top is integrally connected.
Described strip foundation 3 is reinforced concrete structure, often will set up the portal support 4, box beam bracket 5 and the cast-in-situ box girder 6 that form full framing successively between adjacent two strip foundations 3, length 1 ~ the 2m longer than the overall width of box beam bracket 5 of this strip foundation 3, width is identical with the end face width of old bridge pier 1, and height is determined by Force Calculation; Meanwhile, between strip foundation 3 bottom surface and higher level's end face of two stage steps, also need reserved rectangular apertures, in this rectangular apertures, place rubber strip 31.
The portal frame construction that described portal support 4 is set up jointly by horizontal Bailey beam 41, longitudinal Bailey beam 42 and channel-section steel 43, wherein, specification, the quantity of horizontal Bailey beam 41, longitudinal Bailey beam 42 and channel-section steel 43 are determined by calculating; Width 0.5 ~ the 1m wider than box beam bracket 5 of portal support 4, portal support 4 is determined according to convenient construction with the headway of bridge deck 2.
Described box beam bracket 5 is made up of bowl fastening type support or portal support component.
Bowl fastening type support or the portal support component of the horizontal Bailey beam 41 of described portal support 4, longitudinal Bailey beam 42, channel-section steel 43 and box beam bracket 5 are standard component, portal support 4 and box beam bracket 5 set up installation by national regulation and standard, its stressed according to cast-in-situ box girder 6 conduct oneself with dignity and working load calculated by finite element software.
Described cast-in-situ box girder 6 is superstructures of viaduct, central partition place between the double width old bridge built, its underpart has the many case beam pier studs 61 be carried in ground, the suitable bridge being supported in the cast-in-situ box girder 6 on case beam pier stud 61 is general all larger to span, and the quantity of case beam pier stud 61 is generally less, the position of every root case beam pier stud 61 all needs the pier 1 avoiding old bridge to arrange, therefore the strip foundation 3 that pier 1 is arranged can not be conflicted with case beam pier stud 61.
Rubber strip 31 characteristic of higher level's end face contact position of described strip foundation 3 bottom surface and two stage steps and choosing of size, be related to portal support 4 and the stressed stability of box beam bracket 5, that is, at cast-in-situ box girder 6, box beam bracket 5, portal support 4 and strip foundation 3 are under gravity and working load effect, the decrement of the neoprene bearing 21 supplying bridge deck 2 one end to shelve must be identical with the decrement of rubber strip 31, just can make cast-in-situ box girder 6, box beam bracket 5, portal support 4 and strip foundation 3 are synchronously sunk and do not tilt, thus ensure the safety and stability of whole full framing structure, this rubber strip 31 and choosing of neoprene bearing 21 also need to meet following formula:
Formula one,
In formula,
---every cast-in-situ box girder 6, box beam bracket 5, portal support 4 and strip foundation 3 suffered by root strip foundation 3 from the active force of gravity and working load, by finite element software calculate (
);
---power suffered by rubber strip 31 (
);
---power suffered by neoprene bearing 21 (
);
---higher level's end face width of the two stage steps at pier 1 top (
);
---subordinate's end face width of the two stage steps at pier 1 top (
);
---the overall width of the upper and lower level end face of the two stage steps at pier 1 top, namely strip foundation 3 width (
);
Formula two,
In formula
---rubber strip 31 area (
);
---rubber strip 31 thickness (
);
---rubber strip 31 modulus of elasticity (
);
---neoprene bearing 21 gross area (
), the neoprene bearing 21 shelved for bridge deck 2 one end is generally multiple, and neoprene bearing 21 gross area equals the quantity that single neoprene bearing area is multiplied by neoprene bearing;
---neoprene bearing 21 thickness (
);
---neoprene bearing 21 modulus of elasticity (
);
---higher level's end face width of the two stage steps at pier 1 top (
);
---subordinate's end face width of the two stage steps at pier 1 top (
).
Constructing operation step of the present utility model is as follows:
Step one, median strip place between double width old bridge build case beam pier stud 61;
Step 2, to conduct oneself with dignity and working load according to cast-in-situ box girder 6, box beam bracket 5, portal support 4 and strip foundation 3, calculated the active force being delivered to old bridge pier 1 by finite element software, and check the pier 1 of old bridge and the intensity of bridge deck 2; The structure of design strip foundation 3;
Rubber strip 31 characteristic of higher level's end face touching position of the two stage steps at step 3, the bottom surface choosing strip foundation 3 and pier 1 top and size, make the decrement of the neoprene bearing 21 at bridge deck 2 end identical with the decrement of rubber strip 31, thus ensure the safety and stability of whole full framing structure;
Pollutant in step 4, pier 1 top clearing up old bridge, bridge deck 2 top and shrinkage joint, and build in scope in strip foundation 3 and lay geotextiles, in case cement grout leaks affect structure stress in shrinkage joint during pouring reinforcement concrete strip foundation 3, marginal dimension 10 ~ the 20cm larger than strip foundation of geotextiles, rubber strip 31 is placed, assembling reinforcement and joints cement concrete at pier 1 top;
Step 5, after the concrete strength of strip foundation 3 reaches requirement, horizontal Bailey beam 41, longitudinal Bailey beam 42, channel-section steel 43 is adopted to set up portal support 4, adopt bowl fastening type support or portal support component to set up box beam bracket 5, portal support 4 and box beam bracket 5 are set up and are strictly set up installation by national regulation and standard;
Step 6, by national regulation regulation carry out the precompressed of full framing load, finally build cast-in-situ box girder 6 concrete;
Step 7, after cast-in-situ box girder 6 concrete reaches desired strength, remove full framing and strip foundation 3, recover old bridge original state.
Embodiment described in the utility model is only not used in restriction scope of the present utility model for illustration of the utility model.Should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the utility model instruction in addition.
Claims (7)
1. the full framing on an old bridge pier, the median strip comprising double width old bridge and be reserved between double width old bridge, the many bridge deck (2) that every width old bridge is laid on pier by multiple pier (1) and level are formed, and it is characterized in that the median strip place between described double width old bridge builds case beam pier stud (61); The strip foundation (3) across being cast in two pier (1) end faces and Duo Gen bridge deck (2) end face is equipped with between often adjacent two piers (1) of described double width old bridge, often between adjacent two strip foundations (3), portal support (4) is installed, and on portal support, set up box beam bracket (5), cast-in-situ box girder (6) is built in median strip place case beam pier stud (61) top casting on this box beam bracket.
2. the full framing on a kind of old bridge pier according to claim 1, it is characterized in that pier (1) top of described old bridge is provided with two stage steps, subordinate's end face of this two stage steps places neoprene bearing (21), one end of described bridge deck (2) is shelved on this neoprene bearing (21), and higher level's end face of two stage steps is equal with bridge deck (2) end face; On higher level's end face that described strip foundation (3) bottom surface is cast in two stage steps and Duo Gen bridge deck (2) end face, reserved rectangular apertures between this strip foundation (3) bottom surface and higher level's end face of two stage steps, and in rectangular apertures, place rubber strip (31).
3. the full framing on a kind of old bridge pier according to claim 2, it is characterized in that rubber strip (31) characteristic of higher level's end face contact position and the choosing of size of described strip foundation (3) bottom surface and two stage steps, be related to portal support (4) and the stressed stability of box beam bracket (5); Described in cast-in-situ box girder (6), box beam bracket (5), portal support (4) and strip foundation (3) under gravity and working load effect, the decrement of the neoprene bearing (21) supplying bridge deck (2) one end to shelve must be identical with the decrement of rubber strip (31), and this rubber strip (31) and choosing of neoprene bearing (21) need meet following formula:
Formula one,
In formula,
---every cast-in-situ box girder (6), box beam bracket (5), portal support (4) and strip foundation (3) suffered by root strip foundation (3) from the active force of gravity and working load, by finite element software calculate (
);
---power suffered by rubber strip (31) (
);
---power suffered by neoprene bearing (21) (
);
---higher level's end face width of the two stage steps at pier (1) top (
);
---subordinate's end face width of the two stage steps at pier (1) top (
);
---the overall width of the upper and lower level end face of pier (1) top two stage steps, namely strip foundation (3) width (
);
Formula two,
In formula
---rubber strip (31) area (
);
---rubber strip (31) thickness (
);
---rubber strip (31) modulus of elasticity (
);
---neoprene bearing (21) gross area (
), the neoprene bearing (21) shelved for bridge deck (2) one end is generally multiple, and the neoprene bearing gross area equals the quantity that single neoprene bearing area is multiplied by neoprene bearing;
---neoprene bearing (21) thickness (
);
---neoprene bearing (21) modulus of elasticity (
);
---higher level's end face width of the two stage steps at pier (1) top (
);
---subordinate's end face width of the two stage steps at pier (1) top (
).
4. the full framing on a kind of old bridge pier according to claim 1 and 2, it is characterized in that described strip foundation (3) is reinforced concrete structure, its length 1 ~ 2m longer than the overall width of box beam bracket (5), width is identical with the end face width of old bridge pier (1), and its structure stress meets cast-in-situ box girder (6), box beam bracket (5), portal support (4) and strip foundation (3) active force from gravity and working load
requirement.
5. the full framing on a kind of old bridge pier according to claim 1 and 2, it is characterized in that the portal frame construction that described portal support (4) is set up jointly by horizontal Bailey beam (41), longitudinal Bailey beam (42) and channel-section steel (43), the width 0.5 ~ 1m wider than box beam bracket (5) of this portal support (4).
6. the full framing on a kind of old bridge pier according to claim 1 and 2, is characterized in that described box beam bracket (5) is made up of bowl fastening type support or portal support component.
7. the full framing on a kind of old bridge pier according to claim 1 and 2, it is characterized in that described cast-in-situ box girder (6) is supported by the case beam pier stud (61) that many are carried in ground, the position of every root case beam pier stud all needs the pier (1) avoiding old bridge to arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520088356.5U CN204475188U (en) | 2015-02-09 | 2015-02-09 | Full framing on a kind of old bridge pier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520088356.5U CN204475188U (en) | 2015-02-09 | 2015-02-09 | Full framing on a kind of old bridge pier |
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| Publication Number | Publication Date |
|---|---|
| CN204475188U true CN204475188U (en) | 2015-07-15 |
Family
ID=53630991
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|---|---|---|---|
| CN201520088356.5U Expired - Fee Related CN204475188U (en) | 2015-02-09 | 2015-02-09 | Full framing on a kind of old bridge pier |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759862A (en) * | 2016-11-23 | 2017-05-31 | 同济大学建筑设计研究院(集团)有限公司 | A kind of multistage assembled lattice frame building structure |
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
| CN110761190A (en) * | 2019-10-18 | 2020-02-07 | 中铁八局集团第六工程有限公司 | Construction method of Bailey beam full-space frame combined support |
| CN111058386A (en) * | 2020-01-13 | 2020-04-24 | 中冶交通建设集团有限公司 | Viaduct construction method for overpass existing ground bridge |
| CN112900273A (en) * | 2021-01-20 | 2021-06-04 | 浙江交工集团股份有限公司 | Non-contact platform for erecting cast-in-place beam support on separated old bridge and construction method thereof |
-
2015
- 2015-02-09 CN CN201520088356.5U patent/CN204475188U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759862A (en) * | 2016-11-23 | 2017-05-31 | 同济大学建筑设计研究院(集团)有限公司 | A kind of multistage assembled lattice frame building structure |
| CN106759862B (en) * | 2016-11-23 | 2022-09-16 | 同济大学建筑设计研究院(集团)有限公司 | Multistage assembled lattice frame building structure |
| CN109736206A (en) * | 2019-01-28 | 2019-05-10 | 宁波交通工程建设集团有限公司 | Wavelike steel webplate continuous bridge end bay closes up cast-in-place support structure and construction method |
| CN109736206B (en) * | 2019-01-28 | 2023-11-28 | 宁波交通工程建设集团有限公司 | Cast-in-situ bracket structure for bridge side span closure of corrugated steel web continuous beam and construction method |
| CN110761190A (en) * | 2019-10-18 | 2020-02-07 | 中铁八局集团第六工程有限公司 | Construction method of Bailey beam full-space frame combined support |
| CN110761190B (en) * | 2019-10-18 | 2021-10-01 | 中铁八局集团昆明铁路建设有限公司 | Construction method of Bailey beam full-space frame combined support |
| CN111058386A (en) * | 2020-01-13 | 2020-04-24 | 中冶交通建设集团有限公司 | Viaduct construction method for overpass existing ground bridge |
| CN111058386B (en) * | 2020-01-13 | 2021-08-06 | 中冶交通建设集团有限公司 | Viaduct construction method for overpass existing ground bridge |
| CN112900273A (en) * | 2021-01-20 | 2021-06-04 | 浙江交工集团股份有限公司 | Non-contact platform for erecting cast-in-place beam support on separated old bridge and construction method thereof |
| CN112900273B (en) * | 2021-01-20 | 2022-06-10 | 浙江交工集团股份有限公司 | Non-contact platform for erecting cast-in-place beam support on separated old bridge and construction method thereof |
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Granted publication date: 20150715 |