CN112575696A - Anti-overturning reinforcing structure applied to single-column pier bridge and installation method - Google Patents
Anti-overturning reinforcing structure applied to single-column pier bridge and installation method Download PDFInfo
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- CN112575696A CN112575696A CN202011485696.3A CN202011485696A CN112575696A CN 112575696 A CN112575696 A CN 112575696A CN 202011485696 A CN202011485696 A CN 202011485696A CN 112575696 A CN112575696 A CN 112575696A
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- 238000009434 installation Methods 0.000 title claims abstract description 17
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 222
- 239000010959 steel Substances 0.000 claims abstract description 222
- 239000004575 stone Substances 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims description 20
- 238000005553 drilling Methods 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 8
- 210000001015 abdomen Anatomy 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to an anti-overturning reinforcing structure applied to a single-column pier bridge and an installation method thereof. The installation method comprises the steps of prefabricating the steel corbels, prefabricating the steel hoops, pre-assembling the steel hoops, installing the steel beams, installing the support base cushion stones, installing the anti-overturning supports and the like. The invention can effectively enhance the anti-overturning capability of the single-column pier bridge, has small traffic interference, has small influence on the space layout of a substructure and the existing bridge, the line crossing under the bridge and the river-crossing clearance, has no influence on the stress system of the existing structure, and is suitable for popularization and application in the field of single-column pier bridges.
Description
Technical Field
The invention relates to an anti-overturning reinforcing structure applied to a single-column pier bridge and an installation method, and belongs to the technical field of bridge reinforcement.
Background
The urban bridge, especially the ramp bridge, mostly adopts single-column piers, and part of the piers adopt a single-column pier single-support form. With the continuous increase of traffic flow, overspeed overload and the increasing of heavy vehicles seriously affect the operation safety of the single-column pier bridge. In recent years, accidents of transverse overturning of the single-column pier continuous box girder of multiple highways all over the country occur, and great casualties and economic losses are caused. Therefore, the single-column pier bridge operated by a general vehicle is subjected to anti-overturning reinforcement, so that the possibility of potential safety hazards of the single-column pier bridge can be reduced, the occurrence of overturning accidents of the upper structure of the bridge is avoided, and good economic and social benefits are created.
The single-column pier continuous beam bridge is generally provided with double supports at side piers and a single support at a middle pier. When the single-column pier bridge bears the gradually increased automobile load, the side pier support far away from the load application position is gradually stressed and reduced until the side pier support is empty, and the single-support system is reached. When the bridge is empty, the counter force of the structural support is redistributed, the torque is increased, and the corner of the box girder begins to increase sharply until the bridge overturns. Therefore, the anti-overturning capacity of the single-column pier bridge is related to the transverse constraint condition of the bridge.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an anti-overturning reinforcing structure applied to a single-column pier bridge and an installation method, which can effectively improve the anti-overturning capacity of the single-column pier bridge operated by a general vehicle and ensure that the anti-overturning capacity meets the standard requirement.
According to the technical scheme provided by the invention, the anti-overturning reinforcing structure applied to the single-column pier bridge comprises a steel hoop, a steel corbel, a steel beam, a support base stone and an anti-overturning support, wherein the steel hoop is arranged at the upper part of the pier, the steel corbel comprises a steel top plate and a second transverse stiffening rib, the steel top plate is welded at the upper part of the steel hoop, the second transverse stiffening rib is arranged between the steel top plate and the steel hoop, the support base stone is fixed on the steel top plate, the steel beam is arranged at the bottom of the main beam, and the support base stone is connected with the steel beam at the bottom of the main beam through the anti-overturning support fixed at the upper part of the support base stone.
As a further improvement of the invention, the steel beam comprises a support steel plate, a web steel plate and vertical stiffening ribs which are tightly attached to and perpendicular to the support steel plate and the web steel plate, second drill holes for planting bars are arranged at intervals on the contact surface of the support steel plate and the main beam, and the support steel plate is fixed on the main beam through implanted steel bars; the contact surface interval of abdomen steel sheet and girder is provided with the third drilling, abdomen steel sheet is fixed on the girder through the design chemistry crab-bolt that passes the third drilling.
As a further improvement of the invention, the steel anchor ear comprises two half-surrounding steel plates, and the two half-surrounding steel plates are fixed on the upper part of the pier through a high-strength connecting bolt; first drill holes for installing and shaping chemical anchor bolts are arranged at intervals on the contact surface of the semi-surrounding steel plate and the pier; a vertical corner is arranged at the joint of the two semi-surrounding steel plates, and the semi-surrounding steel plates are provided with vertical corners; an anchor bolt hole is reserved in the vertical corner; welding first transverse stiffening ribs which are horizontally arranged and vertical to the bridge pier at equal intervals at the vertical corners; the first transverse stiffening rib and the reserved anchor bolt hole are arranged at intervals; and a clearance of 11-13 cm is reserved between the two semi-surrounding steel plates and the reserved anchor bolt hole.
As a further improvement of the invention, the steel top plate comprises a side steel top plate and a widened side steel top plate, and the side steel top plate and the widened side steel top plate are welded into a whole.
As a further improvement of the invention, the vertical surface of the second transverse stiffening rib is provided with a longitudinal stiffening rib, and the bottom of the second transverse stiffening rib is provided with a third transverse stiffening rib.
As a further improvement of the invention, the support base cushion stone consists of an annular steel plate, a shear nail and a high-strength grouting material cushion stone; the annular steel plate and the shear nails are vertically welded on the steel top plate.
The invention discloses an installation method of an anti-overturning reinforcing structure of a single-column pier bridge, which comprises the following steps:
prefabricating an S1 steel bracket: firstly, sequentially welding the second transverse stiffening rib, the longitudinal stiffening rib and the third transverse stiffening rib to form a steel corbel;
prefabricating an S2 steel hoop: welding first transverse stiffening ribs at equal intervals at the vertical corners of the semi-surrounded steel plate; welding the steel bracket and the steel top plate on the steel hoop;
s3 pre-assembled steel hoop: screwing the two semi-surrounding steel plates into parts of the high-strength connecting bolts for pre-assembling, wherein a preset gap is reserved between the semi-surrounding steel plates and a pier before installation; carrying out first drilling and punching on the bridge pier;
s4, installing a steel hoop: lifting the steel hoop to a preset height; tightening the high-strength connecting bolt to hoop the two semi-surrounded steel plates, and then installing a shaping chemical anchor bolt in the first drilling hole; then, filling a gap between the steel hoop and the pier by using structural adhesive for injecting glue;
s5, mounting a steel beam, namely tightly attaching the support steel plate and the web steel plate to the main beam; coating steel bonding glue between the support steel plate and the main beam; then, implanting a steel bar into the second drilled hole, implanting one end of the steel bar into the bottom of the main beam, and welding the other end of the steel bar with the support steel plate; then installing a shaping chemical anchor bolt in the third drill hole; welding vertical stiffening ribs on the web steel plates;
s6, mounting a support base cushion, namely vertically welding the annular steel plate and the shear nails on the steel top plate; filling a high-strength grouting material cushion stone in the annular steel plate;
s7, installing an anti-overturning support, namely jacking the main beam and adjusting the height of a support base stone in time; and installing the anti-overturning support on the support cushion.
Compared with the prior art, the invention has the following advantages:
the single-column pier bridge has the advantages of effectively enhancing the anti-overturning capacity of the single-column pier bridge, along with simple structure, simplicity and convenience in installation, small traffic interference, small influence on the spatial layout of a lower structure and the existing bridge, the underbridge and river-crossing clearance, no influence on the existing structural stress system, and only playing the anti-overturning function.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a right side view of fig. 1.
Fig. 3 is a front view of the steel hoop and the steel bracket of the present invention.
Fig. 4 is a top view of the steel hoop and the steel bracket of the present invention.
Fig. 5 is a right side view of the steel hoop and the steel corbel of the present invention.
FIG. 6 is a front view of a steel beam according to the present invention.
FIG. 7 is a right side view of the steel beam of the present invention.
Fig. 8 is a schematic view of the overall structure of the support base cushion of the present invention.
Description of reference numerals: 1-main beam, 2-bridge pier, 3-steel top plate, 3.1-non-widened side steel top plate, 3.2-widened side steel top plate, 4-semi-surrounding steel plate, 5-high-strength connecting bolt, 6-first transverse stiffening rib, 7-chemical anchor bolt, 8-second transverse stiffening rib, 9-longitudinal stiffening rib, 10-third transverse stiffening rib, 11-support steel plate, 12-web steel plate, 13-vertical stiffening rib, 14-reinforcing steel bar, 15-anti-overturning support, 16-support cushion stone, 17-annular steel plate, 18-shear nail and 19-vertical corner.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1-8, an antidumping reinforced structure for single-column mound bridge, including steel staple bolt, steel corbel, steel crossbeam, support bed stone 16 and antidumping support 15, the upper portion of pier 2 is located to the steel staple bolt, the steel corbel includes steel roof 3 and the horizontal stiffening rib 8 of second, 3 welding of steel roof sets up in the upper portion of steel staple bolt, is equipped with the horizontal stiffening rib 8 of second between steel roof 3 and the steel staple bolt, support bed stone 16 is fixed on steel roof 3, the bottom of girder 1 is equipped with the steel crossbeam, support bed stone 16 is connected with the steel crossbeam of girder 1 bottom through fixing antidumping support 15 on its upper portion.
The steel beam comprises a support steel plate 11, a web steel plate 12 and vertical stiffening ribs 13 which are tightly attached to and perpendicular to the support steel plate 11 and the web steel plate 12, second drilled holes for planting ribs are arranged at intervals on the contact surface of the support steel plate 11 and the main beam 1, the support steel plate 11 is fixed on the main beam 1 through reinforcing steel bars 14, and the reinforcing steel bars 14 are hot-rolled ribbed reinforcing steel bars with the outer diameter not less than 15 mm; the contact surface interval of abdomen steel sheet 12 and girder 1 is provided with the third drilling, abdomen steel sheet 12 is fixed on girder 1 through the design chemistry crab-bolt 7 that passes the third drilling.
The steel hoop comprises two semi-surrounding steel plates 4, and the two semi-surrounding steel plates 4 are fixed on the upper part of the pier 2 through high-strength connecting bolts 5; first drill holes for installing and shaping chemical anchor bolts 7 are arranged at intervals on the contact surface of the semi-surrounding steel plate 4 and the pier 2; a vertical corner 19 with the width of about 12cm is arranged at the joint of the two semi-surrounding steel plates 4; an anchor bolt hole is reserved in the vertical corner 19; the first transverse stiffening ribs 6 which are horizontally arranged and vertical to the bridge pier 2 are welded at the vertical corners 19 at equal intervals; the first transverse stiffening ribs 6 and the reserved anchor bolt holes are arranged at intervals; a clearance of about 10cm is reserved between the two semi-surrounding steel plates 4 and the reserved anchor bolt hole; and pre-tightening force is applied to the two semi-surrounding steel plates 4 through the high-strength connecting bolt 5 so as to be tightly fixed on the pier 2, and the top stress of the pier 2 is improved.
The steel roof 3 includes not widening the side steel roof 3.1 and widening the side steel roof 3.2, not widening the side steel roof 3.1 and widening the side steel roof 3.2 welding and set up as an organic whole, in actual installation, only in one side installation steel corbel of widening the side steel roof 3.2, if both sides all need be consolidated, then the both sides of steel roof 3 are all set up to widen side steel roof 3.2, then all install the steel corbel.
And longitudinal stiffening ribs 9 are arranged on the vertical surface of the second transverse stiffening rib 8, and a third transverse stiffening rib 10 is arranged at the bottom of the second transverse stiffening rib 8.
The support base cushion 16 consists of an annular steel plate 17, shear nails 18 and a high-strength grouting material cushion; the annular steel plate 17 and the shear pins 18 are vertically welded to the steel top plate 3.
The invention discloses an installation method of an anti-overturning reinforcing structure of a single-column pier bridge, which comprises the following steps:
prefabricating an S1 steel bracket: sequentially welding the second transverse stiffening rib 8, the longitudinal stiffening rib 9 and the third transverse stiffening rib 10 in a factory to form a steel corbel;
prefabricating an S2 steel hoop: welding the first transverse stiffeners 6 at equal intervals at the vertical corners 19 of the semi-surrounding steel plate 4; welding the steel bracket and the steel top plate 3 on the steel hoop;
s3 pre-assembled steel hoop: screwing two half-surrounded steel plates 4 into parts of the high-strength connecting bolts 5 for pre-assembly, wherein a preset gap is reserved between the half-surrounded steel plates and the pier 2 before installation; performing first drilling and punching on the pier 2;
s4, installing a steel hoop: lifting the steel hoop to a preset height; tightening the high-strength connecting bolt 5 to hoop the two semi-surrounded steel plates 4, and then installing a shaped chemical anchor bolt 7 in a first drilling hole; then, filling a gap between the steel hoop and the pier 2 by using structural adhesive for injecting glue;
s5, mounting a steel beam, namely tightly attaching the support steel plate 11 and the web steel plate 12 to the main beam 1; steel adhesive is coated between the support steel plate 11 and the main beam 1; then, steel bars 14 are implanted into the second drilled hole, one end of each steel bar 14 is implanted into the bottom of the main beam 1, and the other end of each steel bar 14 is welded with the support steel plate 11; then installing a shaping chemical anchor bolt 7 in the third drilling hole; welding vertical stiffening ribs 13 on the web steel plate 12;
s6, mounting a support base stone, namely vertically welding the annular steel plate 17 and the shear nails 18 on the steel top plate 3; filling a high-strength grouting material cushion in the annular steel plate 17;
s7, installing an anti-overturning support, namely jacking the main beam 1 and adjusting the height of the support base cushion stone 16 in time; an anti-overturning mount 15 is mounted on the mount pad 16.
The working principle of the invention is as follows:
according to the invention, the steel hoop and the steel corbel are welded to form the steel bent cap, so that the installation space of the anti-overturning support is provided; the steel anchor ear is tightly fixed on the pier body through the high-strength connecting bolt, and the anti-shearing force and the friction force of the high-strength connecting bolt are utilized to resist the support counter force of the anti-overturning support; the transverse constraint of the single-column pier bridge is enhanced by adding the anti-overturning support, so that the larger torque generated by load eccentricity can be effectively reduced, and the potential safety hazard of transverse overturning instability of the single-column pier bridge is reduced; the anti-overturning support does not participate in stress under the normal working condition of the single-column pier bridge, only intervenes in the work under the condition that the side pier support of the single-column pier bridge is emptied and twisted, only exerts the anti-overturning function and does not influence the original structural stress system. The reinforcing structure is simple, the installation is convenient, the anti-overturning performance of the single-column pier bridge is improved, and the requirement of attractive and elegant urban landscape is met.
Claims (8)
1. The utility model provides an antidumping reinforced structure for single-column pier bridge, a serial communication port, includes steel staple bolt, steel corbel, steel crossbeam, support bed stone (16) and antidumping support (15), the upper portion of pier (2) is located to the steel staple bolt, the steel corbel includes steel roof (3) and the horizontal stiffening rib of second (8), steel roof (3) welding sets up in the upper portion of steel staple bolt, is equipped with the horizontal stiffening rib of second (8) between steel roof (3) and the steel staple bolt, support bed stone (16) are fixed on steel roof (3), the bottom of girder (1) is equipped with the steel crossbeam, support bed stone (16) are connected with the steel crossbeam of girder (1) bottom through fixing antidumping support (15) on its upper portion.
2. The anti-overturning reinforcing structure applied to the single-column pier bridge is characterized in that the steel cross beam comprises a support steel plate (11), a web steel plate (12) and vertical stiffening ribs (13) close to and perpendicular to the support steel plate (11) and the web steel plate (12), second drilled holes for planting bars are arranged at intervals on the contact surface of the support steel plate (11) and the main beam (1), and the support steel plate (11) is fixed on the main beam (1) through steel bars (14); the contact surface interval of abdomen steel sheet (12) and girder (1) is provided with the third drilling, abdomen steel sheet (12) are fixed on girder (1) through design chemistry crab-bolt (7) that pass the third drilling.
3. The anti-overturning reinforcing structure applied to the single-column pier bridge is characterized in that the steel hoop comprises two semi-surrounding steel plates (4), and the two semi-surrounding steel plates (4) are fixed to the upper part of the pier (2) through high-strength connecting bolts (5); first drill holes for installing and shaping chemical anchor bolts (7) are arranged on the contact surface of the semi-surrounding steel plate (4) and the pier (2) at intervals; a vertical corner (19) is arranged at the joint of the two semi-surrounding steel plates (4); the vertical corner (19) is reserved with an anchor bolt hole; first transverse stiffening ribs (6) which are horizontally arranged and are vertical to the bridge pier (2) are welded at equal intervals at the vertical corners (19); the first transverse stiffening rib (6) and the reserved anchor bolt hole are arranged at intervals; and a clearance is reserved between the two semi-surrounding steel plates (4) and the reserved anchor bolt hole.
4. The anti-overturning reinforcing structure applied to the single-column pier bridge according to claim 3, wherein a clearance is reserved between the two semi-surrounding steel plates (4) and the reserved anchor bolt holes, and the clearance is 11cm-13 cm.
5. The anti-overturning reinforcing structure applied to the single-column pier bridge is characterized in that the steel top plate (3) comprises a side steel top plate (3.1) and a widened side steel top plate (3.2), and the side steel top plate (3.1) and the widened side steel top plate (3.2) are welded and arranged into a whole.
6. An anti-overturning reinforcing structure applied to a single-column pier bridge, according to claim 1, characterized in that the second transverse stiffening rib (8) is provided with a longitudinal stiffening rib (9) on the vertical plane, and the bottom of the second transverse stiffening rib (8) is provided with a third transverse stiffening rib (10).
7. The anti-overturning reinforcing structure applied to the single-pier bridge according to claim 1, wherein the support padstone (16) consists of an annular steel plate (17), shear nails (18) and a high-strength grouting material padstone; the annular steel plate (17) and the shear nails (18) are vertically welded on the steel top plate (3).
8. The installation method of the anti-overturning reinforcing structure of the single-column pier bridge is characterized by comprising the following steps of:
prefabricating an S1 steel bracket: firstly, sequentially welding the second transverse stiffening rib (8), the longitudinal stiffening rib (9) and the third transverse stiffening rib (10) to form a steel corbel;
prefabricating an S2 steel hoop: welding first transverse stiffening ribs (6) at equal intervals at vertical corners (19) of the semi-surrounding steel plate (4); welding the steel bracket and the steel top plate (3) on the steel hoop;
s3 pre-assembled steel hoop: screwing the two semi-surrounding steel plates (4) into the high-strength connecting bolt (5) for pre-assembly, wherein a preset gap is reserved between the semi-surrounding steel plates and the pier (2) before installation; carrying out first drilling and punching on the pier (2);
s4, installing a steel hoop: lifting the steel hoop to a preset height; tightening the high-strength connecting bolt (5) to hoop the two semi-surrounded steel plates (4), and then installing a shaping chemical anchor bolt (7) in the first drilling hole; then, filling a gap between the steel hoop and the pier (2) by using structural adhesive for injecting glue;
s5, mounting a steel beam, namely tightly attaching the support steel plate (11) and the web steel plate (12) to the main beam (1); steel adhesive is coated between the support steel plate (11) and the main beam (1); then, steel bars (14) are implanted into the second drilled hole, one end of each steel bar (14) is implanted into the bottom of the main beam (1), and the other end of each steel bar (14) is welded with the support steel plate (11); then installing a shaping chemical anchor bolt (7) in the third drilling hole; welding vertical stiffening ribs (13) on the web steel plate (12);
s6, mounting a support base cushion, namely vertically welding the annular steel plate (17) and the shear nails (18) on the steel top plate (3); filling high-strength grouting material cushion stones in the annular steel plates (17);
s7, installing an anti-overturning support, namely jacking the main beam (1) and adjusting the height of a support base stone (16) in time; and installing an anti-overturning support (15) on the support cushion stone (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011485696.3A CN112575696A (en) | 2020-12-16 | 2020-12-16 | Anti-overturning reinforcing structure applied to single-column pier bridge and installation method |
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| CN202011485696.3A CN112575696A (en) | 2020-12-16 | 2020-12-16 | Anti-overturning reinforcing structure applied to single-column pier bridge and installation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113136793A (en) * | 2021-04-30 | 2021-07-20 | 四川省交通勘察设计研究院有限公司 | Novel steel structure capping beam and construction method |
| CN113494056A (en) * | 2021-07-13 | 2021-10-12 | 石家庄铁道大学 | Existing railway small-span beam reinforcing system and method based on additional support |
| CN114214969A (en) * | 2021-12-01 | 2022-03-22 | 广州市市政工程设计研究总院有限公司 | Width splicing structure and method of width splicing bridge |
| CN114775461A (en) * | 2022-04-07 | 2022-07-22 | 清华大学 | Concrete bridge widening and reinforcing structure and construction method thereof |
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| 刘海宽: "河南省王兰高速独柱墩桥梁抗倾覆验算与加固改造", 工程抗震与加固改造, vol. 37, no. 5, 31 October 2015 (2015-10-31), pages 87 - 90 * |
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| CN113136793A (en) * | 2021-04-30 | 2021-07-20 | 四川省交通勘察设计研究院有限公司 | Novel steel structure capping beam and construction method |
| CN113494056A (en) * | 2021-07-13 | 2021-10-12 | 石家庄铁道大学 | Existing railway small-span beam reinforcing system and method based on additional support |
| CN113494056B (en) * | 2021-07-13 | 2022-08-30 | 石家庄铁道大学 | Existing railway small-span beam reinforcing system and method based on additional support |
| CN114214969A (en) * | 2021-12-01 | 2022-03-22 | 广州市市政工程设计研究总院有限公司 | Width splicing structure and method of width splicing bridge |
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