CN114775458B - Method for additionally paving UHPC layer on bridge deck concrete pavement layer - Google Patents
Method for additionally paving UHPC layer on bridge deck concrete pavement layer Download PDFInfo
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- CN114775458B CN114775458B CN202210266435.5A CN202210266435A CN114775458B CN 114775458 B CN114775458 B CN 114775458B CN 202210266435 A CN202210266435 A CN 202210266435A CN 114775458 B CN114775458 B CN 114775458B
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 83
- 239000004567 concrete Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 9
- 239000011800 void material Substances 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 4
- 238000007788 roughening Methods 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 abstract description 6
- 238000010008 shearing Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 83
- 238000010276 construction Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 239000011384 asphalt concrete Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000001674 Agaricus brunnescens Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
Abstract
The invention relates to a method for additionally paving a UHPC layer on a bridge deck concrete pavement layer, belonging to the technical field of bridge maintenance and reinforcement engineering. Through drilling on existing pavement layer, pour UHPC and maintenance back, UHPC post in the hole firmly connects UHPC layer and existing bridge floor structure to improve the bonding strength between UHPC layer and the existing bridge floor structure, avoid appearing the debonding or the void phenomenon of UHPC layer in the subsequent use. The shearing resistance and the pulling resistance of the UHPC column can be further improved by making the holes thin and waist-shaped and putting the steel wire net winding drum into the holes. The method can avoid the traditional reinforcement planting operation, improve the operation environment, reduce the damage to the existing structure, greatly improve the water resistance and the corrosion resistance of the new bridge deck pavement, omit the operation of completely removing the existing pavement layer and accelerate the engineering progress.
Description
Technical Field
The invention relates to a method for reinforcing a concrete bridge by adopting an enlarged section method, in particular to a method for additionally paving a UHPC layer on a bridge deck concrete pavement layer, and belongs to the technical field of bridge maintenance and reinforcement engineering.
Background
In recent years, ultra-high performance concrete (Ultra High Performance Concrete, UHPC for short) has been more fully studied and used. UHPC has the characteristics of ultrahigh compressive strength not lower than 120MPa, ultrahigh flexural strength, good volume stability, high toughness, good impermeability and the like. As a reinforcing material of the structure or the member, the rigidity of the structure or the member can be improved, the safety of the structure is improved, the durability can reach more than 50 years, and the service life of the structure can be greatly prolonged. Meanwhile, the UHPC has higher self strength, so that the consumption of other materials can be reduced, the dead weight of the structure is reduced, the construction difficulty is reduced, the manpower and material resources are saved, and the construction cost is reduced.
When the bearing capacity of the existing bridge is insufficient, the method for increasing the cross section is a common method for reinforcing. Under the condition, the thickening pavement layer is the most preferred because the high-altitude operation can be avoided, and the construction is convenient. The existing pavement layer is usually removed during construction, the thickened pavement layer is cast, and the double-layer reinforcing steel bar net is placed in the pavement layer, so that the secondary constant load is definitely increased, the double-layer reinforcing steel bar net in the pavement layer influences the concrete pouring speed and quality, the distance between the reinforcing steel bar protection layers or the reinforcing steel bar layers is small, the bottom reinforcing steel bars can fall on the upper surface of the girder top plate when the pavement layer is stepped on during construction, and the bonding between the pavement layer and the girder is seriously influenced. If the existing pavement layer is well bonded with the main beam below, the phenomenon of debonding such as 'hollowing' does not exist, and the existing pavement layer is completely shoveled out, so that great waste is caused, and the workload is increased. The UHPC is an ideal material for paving, so that the bearing capacity of the bridge is improved, and the wear resistance, the water resistance, the corrosion resistance and the like are improved. At present, UHPC is relatively high in cost compared with common concrete, so that the existing pavement layer is not economical to be completely shoveled. The original paving layer is reserved, and then the UHPC layer is additionally paved to be the first choice.
And (3) paving the concrete layer, wherein measures are needed to enhance the binding force of the new and old concrete binding layers. If the surface of the existing pavement layer is roughened just before pouring new concrete, the binding force of the binding surface is relatively weak, the added pavement layer is still easy to debond under the action of factors such as large impact load, and the phenomenon of 'hollowing' appears, and the phenomenon continues to develop until the added pavement layer is cracked and broken. To enhance the bond between new and old concrete, existing concrete layers are typically drilled and reinforced with a chemical glue. Considering that the diameter of the steel bar is smaller, pneumatic drills are often adopted in corresponding drilling construction, the vibration is large during drilling, fatigue damage can be caused to the existing concrete, the safety of the structure can be greatly reduced in the construction process, and dust, vibration and noise during construction seriously influence the physical health of workers; in addition, the durability of chemical glue has been questionable, and if it fails after many years, it will bring about a safety problem for the structure, and serious disaster will bring about structural collapse. In addition, there is a similar concern in applying a chemical glue to the interface as an adhesion agent.
Disclosure of Invention
In order to overcome the defects in the prior art and improve the bonding strength between the UHPC additional pavement layer and the existing pavement layer, a method for adding the UHPC layer to the bridge deck concrete pavement layer needs to be developed.
The technical scheme provided by the invention is that the existing paving layer is drilled, UHPC is poured and cured, the UHPC entering the holes forms UHPC columns integrated with the UHPC layer, and the UHPC layer is firmly connected with the existing bridge deck structure.
Preferably, the drilling operation adopts a hollow drill, or adopts a solid grinding drill, or adopts high-pressure water jet to form holes.
Preferably, the radius of the hole is continuously changed along the height direction, the hole is in a thin waist shape, the radius of the bottom is larger than the radius of the middle part of the hole, and the radius of the hole opening is also larger than the radius of the middle part of the hole.
Preferably, the holes extend through the existing pavement into the underlying concrete slab.
Preferably, the minimum diameter of the hole is larger than 40mm, and the depth is larger than 40mm.
Preferably, prior to drilling, the positions and depths of the existing pavement and the steel bars in the concrete slab below the existing pavement are determined by using a steel bar detector so as to determine the hole sites capable of avoiding the steel bars.
Preferably, the UHPC is doped with fibers, the length of which is less than the smallest radius of the holes and less than half the thickness of the UHPC layer.
Preferably, prior to drilling, roughening the existing pavement layer; after drilling, cleaning the surface of the existing pavement layer, and cleaning the holes; before UHPC is poured, water is sprayed on the existing pavement layer for many times, saturation and dryness are achieved, and accumulated water in the holes is removed.
Preferably, a steel wire net winding drum made of thin steel wires is placed in the holes, the opening of the winding drum faces upwards, and the high end of the winding drum is 10mm lower than the upper surface of the UHPC layer.
Preferably, before drilling, the void area of the existing pavement layer is ascertained, and pavement layer concrete in the void area is removed; and then removing pavement layer concrete within 50mm of each side of the existing pavement layer crack.
The beneficial effects of the invention include the following aspects:
(1) The operation of completely dismantling the existing pavement layer is omitted, the material waste is avoided, the damage and the damage to the lower component in the dismantling process are avoided, and the engineering progress is quickened;
(2) The traditional bar planting operation is avoided, the operation environment is improved, the damage to the existing structure is reduced, the construction operation environment is greatly improved, and the influence of dust, vibration and noise on the health of workers is avoided;
(3) The UHPC column formed by drilling not only can improve the shear strength between the UHPC layer and the existing pavement layer, but also has high pulling resistance, and the bonding strength between the UHPC layer and the existing pavement layer is strongly enhanced;
(4) The pull-out resistance of the UHPC column can be further improved by making the holes thin and waist-shaped and putting a steel wire mesh drum in the holes;
(5) The UHPC column can firmly connect the newly poured UHPC layer, the existing paving layer and the main beam top plate into a whole by enabling the holes to penetrate through the existing paving layer and extend into the concrete slab below, so that the bonding strength between the original paving layer and the main beam top plate is further improved, namely the bonding strength between the new paving layer and the main beam top plate is improved;
(6) When the hollow drill is used for drilling, the strength of the UHPC column is not reduced by reserving the old concrete column at the bottom, the consumption of the UHPC is reduced, the construction is simplified, and the construction progress is accelerated;
(7) By reserving the old concrete column with the top protruding upwards in the hole after drilling, the steel fiber can automatically adjust the direction in the process of flowing to the annular groove in the process of pouring UHPC, and the steel fiber is in a vertical direction, so that the shearing resistance and the pulling resistance of the UHPC column can be improved, and the bonding capacity between the UHPC layer and the existing pavement layer can be improved;
(8) The UHPC layer is additionally paved on the existing paving layer, so that the secondary constant load can be reduced, a bridge deck reinforcing mesh can be not arranged in construction, the convenience of bridge deck construction is improved, the construction progress can be accelerated, and the bonding performance between the new bridge deck paving layer and the main girder top plate is ensured;
(9) The technology of the invention is suitable for the paving construction of all concrete structures, such as thickening of concrete box girders or T girder webs in bridges, reinforcement of capping girders, waterproof reinforcement of flood discharge holes of hydropower stations in hydraulic engineering, and the like.
Drawings
FIG. 1 is a schematic view showing a part of the deck structure after the additional paving in example 1;
FIG. 2 is a schematic diagram showing a part of the structure of a UHPC front deck in example 1;
FIG. 3 is a schematic view of a part of a deck structure before UHPC is poured in the embodiment 2;
FIG. 4 is a schematic view showing a part of the deck structure after the additional paving in example 2;
FIG. 5 is a schematic view of a part of a deck structure before UHPC is poured in the embodiment 3;
FIG. 6 is a schematic view showing a part of the deck structure after the additional paving in example 3;
fig. 7 is a schematic side view of a wire mesh drum in example 4;
FIG. 8 is a schematic view showing a part of the deck structure after the additional paving in example 4;
FIG. 9 is a schematic view of a part of a deck structure before UHPC is poured in the embodiment 5;
FIG. 10 is a schematic view showing a part of the deck structure after the additional paving in example 5;
FIG. 11 is a partial schematic of the fiber distribution in UHPC in example 3.
In the figure: the girder roof 1, existing pavement layer 2, UHPC layer 3, UHPC post 4, hole 5, old concrete column 6, wire net reel 7, steel fiber 8.
Detailed Description
Example 1
The bridge that corresponds in this embodiment is simply supported concrete box girder, and existing layer of mating formation appears taking off after many years operation, and along with the increase of vehicle load, the crack appears in the bottom plate lower surface, and the bridge bearing capacity is low, decides through adding the UHPC layer of spreading, the layer of mating formation of thickening to improve bridge bearing capacity and durability. The thickness of the existing paving layer is 80mm, and the designed UHPC layer thickness is 40mm. The construction comprises the following steps:
Step 1: removing the asphalt concrete surface layer, and cleaning the surface of the existing pavement layer; roughening the existing pavement layer; detecting a void area of the existing pavement layer of the full bridge by using a knocking method, and removing pavement layer concrete in the void area; then, removing pavement layer concrete within 50mm of each of two sides of the existing pavement layer crack;
Step 2: referring to the original design drawing, determining the positions and depths of the existing pavement layers and the steel bars in the concrete slab below the existing pavement layers by using a steel bar detector, and marking by using paint with different colors; pushing from one end of the bridge to the other end, and determining a hole site capable of avoiding the reinforcing steel bars; the hole sites are arranged in a quincuncial shape, and the interval between the hole sites is smaller than 600mm;
step 3: holes are drilled in the holes by using a hollow drill, see fig. 1 and 2, which are partial schematic views of the deck structure before and after casting UHPC. The nominal outer diameter of the drill bit of the core drill is 42mm. The depth of the drilled hole 5 is 50mm;
Step 4: cleaning the surface of the existing pavement layer 2 and cleaning holes; sprinkling water for multiple times on the existing pavement layer 2 to reach saturation and dryness, and removing accumulated water in the holes 5; pouring UHPC, enabling the thickness of the UHPC layer 3 to reach the design requirement, and curing according to the design rule; the UHPC is internally doped with steel fibers, the length of the steel fibers is 20mm, and the diameter is 0.3mm;
step 5: and pouring a new asphalt concrete surface layer.
In the finished deck structure, the UHPC in the access holes 5 forms UHPC columns 4, firmly connecting the existing deck layer 2 and the UHPC layer 3. The excellent properties of UHPC materials allow the UHPC column 4 to have high shear and pull-out resistance.
Example 2
This embodiment is a modification of embodiment 1, see fig. 3 and 4. In this embodiment the depth of the borehole is increased, the depth of the hole 5 being 100mm, extending into the main girder top plate 1. The UHPC column 4 can firmly connect the newly poured UHPC layer 3 with the existing paving layer 2 and the main girder top plate 1 into a whole, so that the bonding strength between the existing paving layer 2 and the main girder top plate 1 is further improved, namely, the bonding strength between the new paving layer and the main girder top plate 1 is improved.
Example 3
This embodiment is a modification of embodiment 1, see fig. 5 and 6. In this embodiment, after the hollow drill is used to drill to the designed depth, the hole rod and the drill bit are pulled up while rotating, the concrete column is left in the hole 5, and the top of the concrete column is removed by a hand hammer and chisel, so that the old concrete column 6 is obtained, and the middle part of the old concrete column 6 is protruded. And the bottom of the UHPC column 4 obtained after the UHPC is poured is internally wrapped with a concrete column with the existing pavement layer 2. The UHPC consumption is reduced while the strength of the UHPC column 4 is not reduced, the construction is simplified, and the construction progress is quickened. More importantly, the distribution of the steel fibers 8 in the UHPC column 4 is more beneficial to stress, and the steel fibers 8 automatically adjust the direction towards the vertical direction in the process of flowing the UHPC into the annular groove of the hole 5, thereby being more beneficial to improving the shearing resistance and the pulling resistance of the UHPC column 4.
Example 4
This embodiment is a modification of embodiment 1, see fig. 7 and 8. Inside the hole 5 a steel wire web roll 7 is placed. The steel wire net winding drum 7 is shaped like a conventional steel reinforcement cage and is made of thin steel wires, and the height of the steel wire net winding drum is 80mm. The addition of the steel wire mesh drum 7 further enhances the shearing resistance and the pulling resistance of the UHPC column 4.
Example 5
This embodiment is a modification of embodiment 1, see fig. 9 and 10. Solid abrasive drills are used for drilling, and the drill bit of the drill is a brazed diamond mushroom head. After the vertical drilling is carried out to a specified depth, the drill bit is lifted, and the upper part of the hole is reamed; then the hole bottom is drilled, the drill rod is rotated, and the hole bottom is reamed, so that a hole 5 as shown in fig. 9 is obtained. The radius of the holes 5 along the height direction is continuously changed, and the holes are in a thin waist shape. After UHPC is poured, the occlusion of the UHPC column 4 can greatly increase the pulling resistance and prevent the debonding of a new bridge deck pavement layer.
Example 6
This embodiment is a modification of embodiment 5. Considering that the whole process of drilling adopts a solid grinding drill which is relatively time-consuming, the abrasion to the drill bit is large, and the forming mode of the hole 5 in the embodiment 5 is modified. The hole 5 shown in fig. 9 can also be obtained by combining a core drill with a grinding drill, specifically, by making a hole 5 with a vertical hole wall as shown in fig. 2 with a core drill as described in example 1, correcting the hole section by using a grinding drill as described in example 5, and then correcting the hole bottom section by using a method as described in example 5.
Claims (3)
1. A method for additionally paving a UHPC layer on a bridge deck concrete pavement layer is characterized by comprising the following steps: drilling holes on the existing paving layer, pouring UHPC, curing, and then forming UHPC columns integrated with the UHPC layer by UHPC entering the holes, and firmly connecting the UHPC layer with the existing bridge deck structure; the holes penetrate through the existing pavement layer and extend into the concrete slab below; the minimum diameter of the hole is larger than 40mm, and the depth is larger than 40mm; before drilling, determining the positions and depths of the reinforcing steel bars in the existing pavement layer and the concrete slab below the existing pavement layer by adopting a reinforcing steel bar detector so as to determine hole sites capable of avoiding the reinforcing steel bars; the radius of the hole is continuously changed along the height direction, the hole is in a thin waist shape, the radius of the bottom is larger than the radius of the middle part of the hole, and the radius of the hole opening is also larger than the radius of the middle part of the hole; the drilling operation adopts a hollow drill, or adopts a solid grinding drill, or adopts high-pressure water jet to form holes; a steel wire net winding drum made of fine steel wires is arranged in the holes, the opening of the winding drum faces upwards, and the high end of the winding drum is 10mm lower than the upper surface of the UHPC layer; the UHPC is doped with fibers, and the length of the fibers is smaller than the minimum radius of the holes and smaller than half the thickness of the UHPC layer.
2. The method for additionally paving a UHPC layer on a bridge deck concrete pavement layer according to claim 1, which is characterized in that: before drilling, roughening an existing pavement layer; after drilling, cleaning the surface of the existing pavement layer, and cleaning the holes; before UHPC is poured, water is sprayed on the existing pavement layer for many times, saturation and dryness are achieved, and accumulated water in the holes is removed.
3. The method for additionally paving a UHPC layer on a bridge deck concrete pavement layer according to claim 1, wherein the method comprises the following steps: before drilling, ascertaining a void area of an existing pavement layer, and removing pavement layer concrete in the void area; and then removing pavement layer concrete within 50mm of each side of the existing pavement layer crack.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210266435.5A CN114775458B (en) | 2022-03-17 | 2022-03-17 | Method for additionally paving UHPC layer on bridge deck concrete pavement layer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210266435.5A CN114775458B (en) | 2022-03-17 | 2022-03-17 | Method for additionally paving UHPC layer on bridge deck concrete pavement layer |
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| CN114775458A CN114775458A (en) | 2022-07-22 |
| CN114775458B true CN114775458B (en) | 2024-04-26 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109168A (en) * | 2007-08-16 | 2008-01-23 | 西安公路养护技术工程研究中心有限公司 | Interlamination processing method for high grade road asphalt road surface |
| CN202766941U (en) * | 2012-09-24 | 2013-03-06 | 重庆市智翔铺道技术工程有限公司 | Casting type asphalt concrete colored pavement brick |
| CN103938514A (en) * | 2014-04-15 | 2014-07-23 | 南昌航空大学 | Concrete pavement oxide treatment structure and construction method thereof |
| CN107059536A (en) * | 2017-04-26 | 2017-08-18 | 河北工业大学 | A kind of new-to-old concrete interface bar planting adhesive method |
| CN111608093A (en) * | 2020-05-21 | 2020-09-01 | 南京梦联桥传感科技有限公司 | Shear-resistant reinforcing method for hollow plate beam based on high-performance composite material |
| CN112359722A (en) * | 2020-12-18 | 2021-02-12 | 福州大学 | Steel-concrete combined bridge deck poured by concrete beams in separate bins and construction method thereof |
| CN113089470A (en) * | 2021-04-14 | 2021-07-09 | 四川省交通建设集团股份有限公司 | Bridge deck high-toughness ultrathin wearing layer and construction method thereof |
| CN215482224U (en) * | 2021-01-04 | 2022-01-11 | 中铁第四勘察设计院集团有限公司 | Prefabricated bridge deck and combination beam |
-
2022
- 2022-03-17 CN CN202210266435.5A patent/CN114775458B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109168A (en) * | 2007-08-16 | 2008-01-23 | 西安公路养护技术工程研究中心有限公司 | Interlamination processing method for high grade road asphalt road surface |
| CN202766941U (en) * | 2012-09-24 | 2013-03-06 | 重庆市智翔铺道技术工程有限公司 | Casting type asphalt concrete colored pavement brick |
| CN103938514A (en) * | 2014-04-15 | 2014-07-23 | 南昌航空大学 | Concrete pavement oxide treatment structure and construction method thereof |
| CN107059536A (en) * | 2017-04-26 | 2017-08-18 | 河北工业大学 | A kind of new-to-old concrete interface bar planting adhesive method |
| CN111608093A (en) * | 2020-05-21 | 2020-09-01 | 南京梦联桥传感科技有限公司 | Shear-resistant reinforcing method for hollow plate beam based on high-performance composite material |
| CN112359722A (en) * | 2020-12-18 | 2021-02-12 | 福州大学 | Steel-concrete combined bridge deck poured by concrete beams in separate bins and construction method thereof |
| CN215482224U (en) * | 2021-01-04 | 2022-01-11 | 中铁第四勘察设计院集团有限公司 | Prefabricated bridge deck and combination beam |
| CN113089470A (en) * | 2021-04-14 | 2021-07-09 | 四川省交通建设集团股份有限公司 | Bridge deck high-toughness ultrathin wearing layer and construction method thereof |
Non-Patent Citations (1)
| Title |
|---|
| "UHPC 在混凝土梁的加固应用研究进展"，林上顺，第257页，《福建工程学院学报》;林上顺 等;《福建工程学院学报》;第257页 * |
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| CN114775458A (en) | 2022-07-22 |
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