CN108547210B - Expressway hollow slab bridge utilizing old slab and construction method - Google Patents
Expressway hollow slab bridge utilizing old slab and construction method Download PDFInfo
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- CN108547210B CN108547210B CN201810641674.8A CN201810641674A CN108547210B CN 108547210 B CN108547210 B CN 108547210B CN 201810641674 A CN201810641674 A CN 201810641674A CN 108547210 B CN108547210 B CN 108547210B
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- 238000010276 construction Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 20
- 239000004917 carbon fiber Substances 0.000 claims abstract description 20
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 8
- 239000004567 concrete Substances 0.000 claims abstract description 8
- 238000013461 design Methods 0.000 claims description 20
- 238000010008 shearing Methods 0.000 claims description 20
- 239000004744 fabric Substances 0.000 claims description 16
- 230000002787 reinforcement Effects 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000002407 reforming Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
-
- 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
Abstract
The invention relates to a highway hollow slab bridge utilizing old slabs and a construction method, wherein the hollow slab bridge comprises an original hollow slab, a newly-built hollow slab, hinge joints, concrete pavement, asphalt concrete pavement and guardrails; wherein, the original bridge hollow plates and the newly-built hollow plates are arranged in a staggered way at intervals; the lower part of the side surface of the newly-built hollow slab is provided with embedded section steel for supporting the original bridge hollow slab; and each original bridge hollow slab is provided with at least three carbon fiber cloths wound and stuck around the whole cross section at the fulcrum position. The construction method comprises the following steps: 1. separating and processing the original bridge hollow slab; 2. processing a newly-built hollow slab; 3. and (5) construction of the whole bridge. The embedded section steel and the new and old hollow plates are arranged in a staggered manner, so that the original hollow plates of the bridge are utilized to the greatest extent, the bearing capacity of the whole bridge is improved, the problem that the low cost and the high bearing capacity cannot be achieved in the prior art is solved, and the embedded section steel and the new and old hollow plates have positive technical significance.
Description
Technical Field
The invention relates to a highway hollow slab bridge utilizing old slabs during highway widening construction and a construction method thereof, belonging to the technical field of road and bridge construction.
Background
Along with the continuous and vigorous development of the economy of China, the traffic volume of part of road sections of the expressways of China is already or nearly saturated, the requirements of high speed and safe traffic cannot be met, and the whole expansion and transformation of the original expressway are urgently required, so that the original four-lane or six-lane expressway is expanded into an eight-lane or even ten-lane expressway. Most of the expressways needing to be widened and modified are built at the end of the last century, and when many assembled and combined hollow slab bridges with medium and small spans are designed, the adopted automobile load standard is lower by referring to general Standard for road bridge and culvert design (JTJ 021-89), and the requirements of new automobile load standard specified in the New edition general Standard for road bridge and culvert design (JTG D60-2015) cannot be met.
The assembled hollow slab bridge is formed by assembling a block of prefabricated hollow slabs, and generally adopts standard design. If the requirements of the car load class in the new specification are to be met, two approaches can be taken: one method is to replace all the old assembled hollow plates with new hollow plates meeting the new standard requirements, and the method has high cost; another method is to reinforce the original bridge hollow slab (usually called simply the old slab), because the new automobile load standard is improved more than the old load standard, the load, especially the shearing force effect, of the hollow slab is improved more, and the conventional reinforcing method has extremely low reinforcing efficiency and cost because the shearing bearing capacity of the hollow slab is difficult to be improved. From the above information, both methods have drawbacks; at present, when the expressway is widened and reformed, the reformed hollow slab bridge is difficult to make, so that the cost is low, and the bearing capacity, especially the shearing bearing capacity, can be high. In actual operation, in order to meet new automobile load standards, a first method is adopted when many highways are widened and reconstructed, the original bridge is directly dismantled and reconstructed, and the engineering cost is high; the original old plate cannot be effectively utilized, waste is formed, and the transportation and treatment cost is increased.
Therefore, the old plate of the hollow plate bridge is fully utilized, and the design of the highway hollow plate bridge with low cost and high bearing capacity, particularly high shearing bearing capacity is a problem to be solved by the technicians in the field.
Disclosure of Invention
In the prior art, when the expressway is widened and reformed, the reformed hollow slab bridge has the problems of low cost and high bearing capacity, especially the shearing bearing capacity, which cannot be achieved; in order to solve the problem, the invention provides a highway hollow slab bridge utilizing old slabs, which adopts the following technical scheme:
a highway hollow slab bridge using old slabs, comprising: original bridge hollow slab, newly-built hollow slab, hinge joint, concrete pavement, asphalt concrete pavement and guardrail;
wherein, the original bridge hollow plates and the newly-built hollow plates are arranged in a staggered way at intervals; the original bridge hollow slab comprises an original bridge sideboard and an original bridge middle board, and the new hollow slab comprises a new sideboard and a new middle board;
the lower part of the side surface of the newly-built hollow slab connected with the original bridge hollow slab is provided with embedded section steel, and the extending end of the embedded section steel is positioned at the bottom of the adjacent original bridge hollow slab;
at least three carbon fiber cloths wound and stuck around the whole cross section are arranged on each original bridge hollow plate at the fulcrum position; the carbon fiber cloth is strip-shaped and is arranged at intervals in the length direction of the original bridge hollow slab.
Preferably, the vertical distance from the extending end of the embedded section steel to the top surface of the newly-built hollow slab is equal to the vertical height of the original bridge hollow slab.
Or preferably, a triangular steel cushion block is also fixed between the carbon fiber cloth and the original bridge hollow slab at the side hinge joint position of the original bridge hollow slab; the triangular steel cushion block has the shape conforming to the hinge joint part of the original bridge hollow slab, and comprises a triangular frame and a supporting steel plate arranged in the triangular frame, wherein the thickness of the supporting steel plate is the same as the width of the carbon fiber cloth.
Or preferably, the outer side plate of the hollow slab bridge adopts an original bridge side plate, and the inner side plate adopts a new side plate.
The invention also provides a construction method of any highway hollow slab bridge, which is characterized by comprising the following steps:
1. separating and processing an original bridge hollow slab:
1-1, when the hollow slab bridge of the expressway needs to be widened, removing the original bridge to separate out the hollow slab of the original bridge;
1-2, measuring the main body size of an original bridge hollow slab;
1-3, carrying out shearing-resistant reinforcement on the original bridge hollow slab;
2. processing a newly built hollow slab:
2-1, determining the hinge joint size of a newly built hollow slab according to the hinge joint size of the original bridge hollow slab; determining the width and the height of the newly built hollow slab according to the design load standard;
2-2, determining the position of the embedded section steel on the newly built hollow slab according to the heights of the original bridge hollow slab and the newly built hollow slab; determining the specification of the embedded section steel according to the load;
2-3, processing and manufacturing a new hollow slab with embedded section steel;
3. and (3) bridge construction:
3-1, adjacently and alternately paving the original hollow slab processed in the step 1 and the newly built hollow slab processed in the step 2 on the established bridge pier to form a hollow slab bridge;
3-2, paving concrete pavement at the positions of the upper parts and hinge joints of the original bridge hollow slab and the newly-built hollow slab;
3-3, installing a guardrail; paving asphalt concrete; and (5) finishing the operation.
The invention has the following advantages:
(1) For simply supported hollow slab bridges, the total bending moment effect generated by the automobile load is fixed, the bending moment distributed by each hollow slab which forms the bridge is in direct proportion to the bending rigidity, and the larger the bending rigidity is, the larger the distributed bending moment is. According to the hollow slab bridge, the newly-built hollow slabs and the old slabs are arranged in a staggered mode, because the bending rigidity of the newly-built hollow slabs is far greater than that of the old slabs, the bending moment effect of the hollow slab bridge is mainly borne by the newly-built hollow slabs, the bending moment effect borne by the old slabs is smaller, and a load shedding effect exists for the old hollow slabs, so that bending resistance reinforcement of the old slabs is not needed, and a large amount of funds are saved;
(2) The hollow slab bridge in the scheme of the invention can continuously utilize the prefabricated hollow slab of the original bridge, conveniently lift the shearing bearing capacity of the old slab, is suitable for the situation that the bridge can not be lifted by the conventional reinforcement means to have to be dismantled for reconstruction, can save a large amount of funds, and has remarkable economic benefit;
(3) According to the hollow slab bridge, the embedded section steel and the new and old hollow slabs are arranged in a staggered mode, so that the stress phenomenon of a single slab can be effectively prevented, and the structural integrity and durability are improved.
Drawings
FIG. 1 is a schematic diagram of a new bridge structure after widening and reforming in the scheme of the invention;
FIG. 2 is a schematic diagram of an original bridge structure before widening and reforming;
FIG. 3 is a schematic diagram of a new bridge construction after widening and reforming by dismantling the reconstruction scheme;
fig. 4 is a schematic side view of the original bridge hollow slab 1 after shear reinforcement;
FIG. 5 is a schematic cross-sectional view of the original bridge hollow slab 1 after shear reinforcement;
fig. 6 is a schematic perspective view of the triangular steel pad 9;
wherein: 1-original bridge hollow slab, 2-hinge joint, 3-concrete pavement, 4-new hollow slab, 5-asphalt concrete pavement, 6-guardrail, 7-pre-buried section steel, 8-carbon fiber cloth and 9-triangle steel cushion block.
Detailed Description
The invention will be further described with reference to the drawings and examples.
After the expressway operates for nearly twenty years, the expressway needs to be widened and reformed due to the fact that traffic is saturated in advance, and the width of the integral roadbed is widened to 42m from 28 m. The automobile load grade is improved from the automobile-super 20 and the trailer-120 specified in general Standard for road bridge and culvert design (JTJ 021-89) to the road-I grade specified in general Standard for road bridge and culvert design (JTG D60-2015). When the section of expressway is widened and reformed, the scheme of the invention is adopted to reform and design a 10m span pretensioned hollow slab bridge.
The original bridge is an integral roadbed with the width of 28m, the width of a half bridge is 13.5 m, the width of a side plate is 124.5cm, the width of a middle plate is 99cm, and the width of a hinge joint bottom is 1cm; the total of the bridge plates comprises 2 blocks of original bridge side plates and 11 blocks of original bridge side plates; wherein the height of the original bridge hollow slab 1 is 40cm.
After widening and reforming, the bridge is a highway hollow slab bridge using old slabs, 1/2 cross sections of which are shown in figure 1, and the bridge comprises: the novel bridge comprises an original bridge hollow slab 1, a newly-built hollow slab 4, hinge joints 2, concrete pavement 3, asphalt concrete pavement 5 and guardrails 6;
the original bridge hollow slab 1 comprises an original bridge sideboard and an original bridge middle board, and the new hollow slab 4 comprises a new sideboard and a new middle board;
the lower part of the side surface of the newly-built hollow slab 4 connected with the original bridge hollow slab 1 is provided with embedded section steel 7, and the extending end of the embedded section steel 7 is positioned at the bottom of the adjacent original bridge hollow slab 1;
as shown in fig. 4 and 5, in order to ensure that the lifting meets the standard load requirement, the supporting point shearing resistance of the original bridge hollow slab needs to be reinforced, and each original bridge hollow slab 1 is provided with at least three carbon fiber cloths 8 wound and stuck around the whole cross section at the supporting point position; the carbon fiber cloth 8 is strip-shaped, is arranged at intervals in the length direction of the original bridge hollow slab 1, and is stuck at intervals from the fulcrum position. The carbon fiber cloth 8 is fixedly adhered to the original bridge hollow slab 1 by epoxy resin at the position of the hinge joint 2 on the side surface of the original bridge hollow slab 1, and a triangular steel cushion block 9 is fixedly adhered between the carbon fiber cloth 8 and the original bridge hollow slab 1; the triangular steel cushion block 9 is in contour with the hinge joint 2 of the original bridge hollow slab 1, and comprises a triangular frame and a supporting steel plate arranged in the triangular frame, wherein the thickness of the supporting steel plate is the same as the width of the carbon fiber cloth 8. The thickness of the triangular steel cushion block steel plate is 10mm, the width of the carbon fiber cloth is 10cm, 4 layers are adopted, the single-layer thickness is 0.167mm, and the longitudinal spacing is 30cm. The shearing bearing capacity before reinforcement is 329.7kN, which is smaller than the maximum shearing force 347.0kN born by the hollow slab; the bearing capacity of the reinforced shear is 550.6kN, which is larger than the maximum shearing force 347.0kN borne by the hollow slab, thereby meeting the requirements of shearing resistance. The carbon fiber cloth is adhered to the bridge reinforcement by known technology, and the resin material, the technology and the like adopted in the embodiment have no innovation point, so that the technical personnel can directly apply the prior art, and the detailed description is not needed.
The vertical distance from the extending end of the embedded section steel 7 to the top surface of the newly-built hollow slab 4 is equal to the vertical height of the original bridge hollow slab 1. And determining that the position of the top surface of the embedded section steel on the newly-built hollow slab is 20cm away from the bottom surface according to the heights of the original bridge hollow slab and the newly-built hollow slab. The longitudinal distance between the embedded section steel and the wheel is 1 meter according to the rule of the vehicle load size and weight in general Standard for road bridge and culvert design (JTG D60-2015), and the bearing load is 1/4 of the weight of the rear axle of the vehicle, namely 35kN. Under the load effect, the embedded section steel mainly bears the shearing force effect, and if I10I-steel is adopted, the maximum combined shearing stress is as follows according to steel structural design Specification (GB 50017-2017):
meets the shearing requirement.
The embedded section steel 7 is mainly used for enhancing the integrity of the bridge and can prevent the single plate stress phenomenon after hinge joint failure.
After the width of the integral roadbed is widened to 42m, the inner side (the side adjacent to the other 1/2 bridge and the right side in the figure 1) side plate of the hollow slab bridge adopts a newly built side plate, and the outer side (the side opposite to the inner side) side plate adopts an original bridge side plate. The original bridge hollow plates 1 and the newly-built hollow plates 4 are arranged in a staggered way at intervals; the width of the original bridge middle plate is 99cm, the hinge joint size of the newly built hollow plate is determined according to the hinge joint size of the original bridge hollow plate, and the bottom width of the hinge joint is 1cm; according to the general map of highway bridge (plate girder series) of the department of transportation (2008 edition), the width of the newly built middle plate is 124cm, and the width of the newly built side plate is 124.5cm; determining the height of a newly built hollow slab according to the design load standard in general Standard for highway bridge and culvert design (JTG D60-2015) and the calculation method in general Standard for highway reinforced concrete and prestressed concrete bridge and culvert design (JTG D62-2004), wherein the height in the embodiment is 60cm;
the automobile load shared by each hollow slab is represented by a transverse distribution coefficient. The bending moment effect of the hollow slab is related to the bending rigidity of the hollow slab, and the transverse distribution coefficient is calculated by adopting a hinge plate method when the bending moment is calculated. Table 1 shows the comparison of the automobile load effects of the original bridge hollow slab before and after widening, and the table shows that the automobile load midspan bending moment of the original bridge hollow slab applied to the widened bridge is reduced by 41.6% -50.2%, and the load shedding effect is obvious.
The scheme is adopted to widen the new bridge after reconstruction, the maximum bending moment effect of the side plates after combination dead weight load is 484.0 kN.m <631.5 kN.m, the maximum bending moment effect of the middle plate is 404.1 kN.m <574.1 kN.m, namely, the bending moment effects of the side plates and the middle plate are all smaller than the bending resistance bearing capacity of the side plates, the automobile load grade accords with the highway-I grade requirement specified in the general rule for highway bridge and culvert design (JTG D60-2015), the additional bending resistance bearing capacity lifting reinforcement is not needed, and only the cost can be saved by about 31.2 ten thousand yuan in the reconstruction process of each bridge.
The construction method of the highway hollow slab bridge in the embodiment comprises the following steps:
step 1, separating and processing an original bridge hollow slab:
1-1, when the hollow slab bridge of the expressway needs to be widened, removing the original bridge to separate out the hollow slab of the original bridge;
1-2, measuring the main body size of an original bridge hollow slab; in the embodiment, the original bridge is an integral roadbed with the width of 28m, the width of a half bridge is 13.5 m, the width of a side plate is 124.5cm, the width of a middle plate is 99cm, and the bottom width of a hinge joint is 1cm; the total of the bridge plates comprises 2 blocks of original bridge side plates and 11 blocks of original bridge side plates; wherein the height of the original bridge hollow slab is 40cm.
1-3, carrying out shearing reinforcement on the original bridge hollow slab: after the position of the fulcrum is determined, the position of a hinge joint on the side surface of the original bridge hollow slab is stuck and fixed with a triangular steel cushion block by using epoxy resin; at the position of the triangular steel cushion block, using epoxy resin to wind and paste carbon fiber cloth around the full section of the original bridge hollow slab; aligning the carbon fiber cloth with the triangular steel cushion block during pasting; the thickness of the triangular steel cushion block steel plate is 10mm, the width of the carbon fiber cloth is 10cm, 4 layers are adopted, the single-layer thickness is 0.167mm, and the longitudinal spacing is 30cm.
Step 2, processing the newly built hollow slab:
2-1, determining the hinge joint size of a newly built hollow slab according to the hinge joint size of the original bridge hollow slab; according to the general map of highway bridge (plate girder series) of the department of transportation (2008 edition), the width of the newly built middle plate is 124cm, and the width of the newly built side plate is 124.5cm; determining the height of a newly built hollow slab according to the design load standard in general Standard for highway bridge and culvert design (JTG D60-2015) and the calculation method in general Standard for highway reinforced concrete and prestressed concrete bridge and culvert design (JTG D62-2004), wherein the height in the embodiment is 60cm;
and 2-2, determining that the position of the top surface of the embedded section steel on the newly-built hollow slab is 20cm away from the bottom surface according to the heights of the original bridge hollow slab and the newly-built hollow slab. The longitudinal distance between the embedded section steel and the wheel is 1 meter according to the rule of the vehicle load size and weight in general Standard for road bridge and culvert design (JTG D60-2015), and the bearing load is 1/4 of the weight of the rear axle of the vehicle, namely 35kN. Under the load effect, the embedded section steel mainly bears the shearing force effect, and if I10I-steel is adopted, the maximum combined shearing stress is as follows according to steel structural design Specification (GB 50017-2017):
meets the shearing requirement.
2-3, processing and manufacturing a new hollow slab with embedded section steel; how to add pre-buried section steel when prefabricating a new hollow slab belongs to the known general technology, and does not belong to the innovation point of the invention, and a technician can implement the method by himself.
Step 3, whole bridge construction:
3-1, adjacently and alternately paving the original hollow slab processed in the step 1 and the newly built hollow slab processed in the step 2 on the established bridge pier to form a hollow slab bridge; the bridge outer side plate adopts an original bridge side plate, and the bridge inner side plate adopts a newly-built side plate;
3-2, paving concrete pavement at the positions of the upper parts and hinge joints of the original bridge hollow slab and the newly-built hollow slab;
3-3, installing a guardrail; paving asphalt concrete; and (5) finishing the operation.
The relative positional terms such as "left, right, up, down" and the like used in the description of the present invention and the present embodiment are used for convenience of description and understanding, and do not mean absolute positions of the respective components.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention, and the parts not described in detail and shown in partial detail may be applied to the prior art and are not described in detail herein. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (5)
1. A highway hollow slab bridge using old slabs, comprising: the novel bridge hollow slab comprises an original bridge hollow slab (1), a newly-built hollow slab (4), hinge joints (2), concrete pavement (3), asphalt concrete pavement (5) and guardrails (6);
wherein, the original bridge hollow plates (1) and the newly built hollow plates (4) are arranged in a staggered way at intervals; the original bridge hollow slab (1) comprises an original bridge sideboard and an original bridge middle board, and the new hollow slab (4) comprises a new sideboard and a new middle board;
the lower part of the side surface of the newly-built hollow slab (4) connected with the original bridge hollow slab (1) is provided with embedded section steel (7), and the extending end of the embedded section steel (7) is positioned at the bottom of the adjacent original bridge hollow slab (1);
at least three carbon fiber cloths (8) wound and stuck around the whole cross section are arranged at the fulcrum position of each original bridge hollow plate (1); the carbon fiber cloth (8) is strip-shaped and is arranged at intervals in the length direction of the original bridge hollow slab (1).
2. The highway hollow slab bridge according to claim 1, wherein the vertical distance from the extending end of the pre-buried section steel (7) to the top surface of the newly built hollow slab (4) is equal to the vertical height of the original bridge hollow slab (1).
3. The highway hollow slab bridge according to claim 1, wherein triangular steel cushion blocks (9) are further fixed between the carbon fiber cloth (8) and the original bridge hollow slab (1) at the positions of the side hinge joints (2) of the original bridge hollow slab (1); the triangular steel cushion block (9) is in shape with the hinge joint (2) of the original bridge hollow slab (1), comprises a triangular frame and a supporting steel plate arranged in the triangular frame, and has the same thickness as the carbon fiber cloth (8).
4. The highway hollow slab bridge according to claim 1, wherein the outer side slab of the hollow slab bridge adopts an original bridge side slab and the inner side slab adopts a new side slab.
5. A construction method of a highway hollow slab bridge according to any one of claims 1 to 4, comprising the steps of:
step 1, separating and processing an original bridge hollow slab:
1-1, when the hollow slab bridge of the expressway needs to be widened, removing the original bridge to separate out the hollow slab of the original bridge;
1-2, measuring the main body size of an original bridge hollow slab;
1-3, carrying out shearing-resistant reinforcement on the original bridge hollow slab;
step 2, processing the newly built hollow slab:
2-1, determining the hinge joint size of a newly built hollow slab according to the hinge joint size of the original bridge hollow slab; determining the width and the height of the newly built hollow slab according to the design load standard;
2-2, determining the position of the embedded section steel on the newly built hollow slab according to the heights of the original bridge hollow slab and the newly built hollow slab; determining the specification of the embedded section steel according to the load;
2-3, processing and manufacturing a new hollow slab with embedded section steel;
step 3, whole bridge construction:
3-1, adjacently and alternately paving the original hollow slab processed in the step 1 and the newly built hollow slab processed in the step 2 on the established bridge pier to form a hollow slab bridge;
3-2, paving concrete pavement at the positions of the upper parts and hinge joints of the original bridge hollow slab and the newly-built hollow slab;
3-3, installing a guardrail; paving asphalt concrete; and (5) finishing the operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810641674.8A CN108547210B (en) | 2018-06-21 | 2018-06-21 | Expressway hollow slab bridge utilizing old slab and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810641674.8A CN108547210B (en) | 2018-06-21 | 2018-06-21 | Expressway hollow slab bridge utilizing old slab and construction method |
Publications (2)
| Publication Number | Publication Date |
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| CN108547210A CN108547210A (en) | 2018-09-18 |
| CN108547210B true CN108547210B (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810641674.8A Active CN108547210B (en) | 2018-06-21 | 2018-06-21 | Expressway hollow slab bridge utilizing old slab and construction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090108305A (en) * | 2008-04-11 | 2009-10-15 | 주식회사 아이비엘이앤씨 | Construction method of hollow slab bridge |
| CN202227284U (en) * | 2011-05-25 | 2012-05-23 | 河南省九建工程有限公司 | Bridge widening split joint structure |
| CN203383142U (en) * | 2013-02-04 | 2014-01-08 | 郑州长发电子科技有限公司 | Semi-rigid butt seam suitable for widening of hollow slab bridge |
| CN105714694A (en) * | 2016-02-03 | 2016-06-29 | 蓝海建设集团有限公司 | Bridge floor maintenance and reinforcing method applicable to expanded type reinforced concrete slab and girder bridge |
| CN208328648U (en) * | 2018-06-21 | 2019-01-04 | 烟台大学 | A kind of highway hollow slab bridge using old plate |
-
2018
- 2018-06-21 CN CN201810641674.8A patent/CN108547210B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090108305A (en) * | 2008-04-11 | 2009-10-15 | 주식회사 아이비엘이앤씨 | Construction method of hollow slab bridge |
| CN202227284U (en) * | 2011-05-25 | 2012-05-23 | 河南省九建工程有限公司 | Bridge widening split joint structure |
| CN203383142U (en) * | 2013-02-04 | 2014-01-08 | 郑州长发电子科技有限公司 | Semi-rigid butt seam suitable for widening of hollow slab bridge |
| CN105714694A (en) * | 2016-02-03 | 2016-06-29 | 蓝海建设集团有限公司 | Bridge floor maintenance and reinforcing method applicable to expanded type reinforced concrete slab and girder bridge |
| CN208328648U (en) * | 2018-06-21 | 2019-01-04 | 烟台大学 | A kind of highway hollow slab bridge using old plate |
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| CN108547210A (en) | 2018-09-18 |
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