CN112482188B - Arch bridge reinforced structure and construction method thereof - Google Patents
Arch bridge reinforced structure and construction method thereof Download PDFInfo
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- CN112482188B CN112482188B CN202011344845.4A CN202011344845A CN112482188B CN 112482188 B CN112482188 B CN 112482188B CN 202011344845 A CN202011344845 A CN 202011344845A CN 112482188 B CN112482188 B CN 112482188B
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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
- E01D4/00—Arch-type 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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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Abstract
The invention relates to the technical field of bridge reinforcement, and particularly discloses an arch bridge reinforcement structure and a construction method thereof. The arch crown lower surface of arch ring is equipped with curved bearing plate, the both sides anchor of bearing plate is on the arch ring, the protruding end of bearing plate is installed down, be equipped with pressure transmission component between the vault inner wall of the sunken end of bearing plate and arch ring, the space that full arch ring and bearing plate formed is filled to pressure transmission component, the below of bearing plate is equipped with the bow member that a plurality of was arranged according to a determining deviation, the both ends of bow member all adopt reinforced concrete structure to be fixed in on the pier of both sides, all be equipped with arc supporting beam between the adjacent bow member in both sides of bearing plate, the middle part lateral wall top of arch ring is equipped with its fixed connection's crossbeam, the slope is equipped with support piece between crossbeam and the arc supporting beam. This technical scheme is used for promoting the bearing capacity of arch bridge, shortens the reinforced construction cycle of arch bridge, reduces the reinforced construction degree of difficulty of arch bridge.
Description
Technical Field
The invention relates to the technical field of bridge reinforcement, and particularly discloses an arch bridge reinforcement structure and a construction method thereof.
Background
The arch bridge has the advantages of local materials, steel bar and cement saving and simple structure, is widely applied to the arch bridge in the areas of the middle and the western parts of China due to the terrain, but has the problem that more and more arch bridges are insufficient in bearing capacity due to the continuous improvement of the current traffic flow and load grade, the development of traffic transportation is seriously influenced, if all the old bridges are dismantled and rebuilt, the cost is higher, and therefore the bearing capacity is increased by adopting a bridge reinforcing mode generally.
The existing common arch bridge reinforcing methods include a section increasing reinforcing method, a steel plate pasting reinforcing method, a carbon fiber composite pasting reinforcing method, a support increasing reinforcing method, a structural system changing reinforcing method, a bridge deck system reinforcing and load shedding method and the like. However, the method has the problems of influence on upper traffic, large investment, complex construction and the like.
Disclosure of Invention
In view of the above, the present invention provides an arch bridge reinforcing structure and a construction method thereof, which are used to improve the bearing capacity of an arch bridge, shorten the construction period of arch bridge reinforcement, and reduce the construction difficulty of arch bridge reinforcement.
In order to achieve the purpose, the invention provides the following technical scheme:
an arch bridge reinforcing structure comprises a bridge deck, bridge piers and arch rings, and is characterized in that a curved pressure bearing plate is arranged on the lower surface of the arch crown of each arch ring, the two sides of each pressure bearing plate are anchored on the arch rings, the protruding ends of the pressure bearing plates are installed downwards, pressure transmission elements are arranged between the sunken ends of the pressure bearing plates and the inner wall of the arch crown of each arch ring, the pressure transmission elements are filled in spaces formed by the arch rings and the pressure bearing plates and are in tight contact with the surfaces of the pressure bearing plates and the arch rings, a plurality of arch frames which are arranged at certain intervals are arranged below the pressure bearing plates, the middle parts of the arch frames are in tight contact with the middle parts of the pressure bearing plates, the two ends of each arch frame are fixed on the bridge piers on the two sides by adopting a reinforced concrete structure, arc supporting beams are arranged between adjacent arch frames on the two sides of the pressure bearing plates and symmetrically arranged on the two sides of the pressure bearing plates, and one ends of the arc supporting beams are fixed on the side surfaces of the pressure bearing plates, the other end of the arch ring is fixed on the bridge pier, a cross beam fixedly connected with the arch ring is arranged above the side wall of the middle part of the arch ring, a supporting piece is obliquely arranged between the cross beam and the arc-shaped supporting beam, and the two ends of the supporting piece are fixedly connected with the cross beam and the arc-shaped supporting beam.
The pressure transmission element is a rubber block, and the rubber block has the advantage that the rubber block has good buffering performance, can buffer the force applied to the bridge deck and can transmit the force to the reinforcing device below.
Further defined, the pressure transmission element is a combination of a reinforcement cage and concrete, which is advantageous in that the reinforcement cage and concrete combination can be integrated with the arch ring, allowing better and more direct transmission of forces to which the deck and the arch ring are subjected.
Further, the support part is a damper, and the damper is an oil damper, so that the oil damper has the beneficial effects that the buffer effect can be further realized with the damper, and the buffer effect of the oil damper is better.
Further inject, all the welding has the mounting panel on the arc supporting beam of bearing plate both sides, equidistant being equipped with the little bow member of multiunit between the mounting panel of both sides, the both ends of little bow member and the mounting panel welding of both sides, the top of little bow member and the bottom center in close contact with of bearing plate, its beneficial part lies in, the arc supporting beam is when receiving too big external force, the arc supporting beam will be bent, put to the central point of hunch promptly and take place the displacement, weakens the supporting effect of bridge, and the little bow member of installation can restrict the deformation and the displacement volume of arc supporting beam, makes the better power transmission that will receive of arc supporting beam ability on the pier, when reducing the hunch atress, with the better transmission of power on the pier.
Further limit, arc supporting beam's outstanding end is towards the middle part of arched bridge, and its beneficial part lies in, and arc supporting beam's deformation can play the effect of power buffering, and is difficult to by the rupture when producing deformation.
Further inject, the upper portion of pier sets up the reinforced concrete back up coat, and its beneficial part lies in, strengthens the intensity of pier and arc-shaped supporting beam and bow member connecting portion, makes the connection more stable while, can also avoid pier upper portion to receive the damage that local stress caused.
The arch bridge reinforcing construction method is characterized by comprising the following construction steps:
A. anchoring the bearing plate in the middle of the arch ring;
B. filling a rubber block in a space formed by the bearing plate and the arch ring, so that the rubber block is tightly contacted with the bearing plate and the arch ring;
C. an arch center is arranged below the arch ring, so that two ends of the arch center are fixedly connected to the bridge piers, and the upper end of the arch center is tightly contacted with the middle part of the lower end of the arch ring;
D. installing an arc-shaped supporting beam in the middle of the adjacent arch centering, fixedly connecting two ends of the arc-shaped supporting beam with the bridge pier, and enabling the upper end of the arc-shaped supporting beam to be in close contact with the middle of the arch ring;
E. welding mounting plates on the arc-shaped support beams on two sides of the arch ring, and connecting the arc-shaped support beams on one side in series by the mounting plates;
F. mounting small arch frames on the arc-shaped support beams below the same arch ring, welding two ends of each small arch frame on the mounting plate, and positioning the small arch frames between the adjacent arch frames;
G. a cross beam is fixedly arranged in the middle of the arch ring, and the cross beam is fixedly connected with the middle of the arch ring in a bar planting mode;
H. and a support piece is obliquely arranged between the cross beam and the arc-shaped support beam, and two ends of the support piece are respectively fixed in the middle parts of the cross beam and the arc-shaped support beam.
And further limiting, the step B can be filled with a combination of the reinforcement cage and the concrete, and before the step B is executed, the lower surface of the middle part of the arch ring needs to be roughened, so that the roughening treatment can enable the connection between the combination of the reinforcement cage and the concrete and the arch ring to be more stable and tight, and the combination of the reinforcement cage and the concrete and the common arch ring to form a whole, and enable the combination of the reinforcement cage and the concrete and the common arch ring to better transmit force.
And further limiting, the roughening treatment before the step B is specifically that a steel brush is used for scraping transverse grains and longitudinal grains in the middle of the lower surface of the arch ring, and the method has the advantages that the roughening method is simple, the rivet pulling cost is low, and the roughening speed block can shorten the arch bridge reinforcing period.
The working principle of the scheme is as follows: when a large load is applied to the bridge floor, the force and the bending moment applied to the bridge floor are transmitted to the arch ring, the arch ring generates a vertical downward force and transmits and disperses the force along the arch ring to transmit the force to the bridge piers, when the force applied to the arch ring is large, the arch ring deforms downward and acts on a rubber block arranged above the bearing plate or a combination of a steel reinforcement cage and concrete to transmit the force, the arch frame provides an upward supporting force for the arch ring and transmits the force to the bridge piers, the arch frame also deforms at the same time, the force is continuously transmitted downward to the arc-shaped supporting beams, the arc-shaped supporting beams further deform and buffer and transmit the force to the bridge piers, if the deformation of the arc-shaped supporting beams is too large, the small arch ring can be stressed to limit the deformation of the arc-shaped supporting beams to improve the rigidity of the arc-shaped supporting beams and better transmit the force to the bridge sections, because the upper portion of bridge segment is consolidated through reinforced concrete, the pier bearing capacity obtains promoting, also can not receive the damage because the local stress that receives is great simultaneously, the support piece of arch ring mid-mounting then can cushion and transmit what all the other positions of arch ring received to support a supporting force through the arc, guarantee that the atress on each position of arch ring can both transmit and cushion, with the bearing capacity of reinforcing arch ring, make the arch bridge after the reinforcement use safer.
The technical effect obtained by the scheme is as follows: (1) through the reinforcements such as the below installation pressure-bearing plate, bow member, arc supporting beam and support piece at the arch ring, promoted the bearing capacity of arch ring, make the bridge after the reinforcement use safer. (2) The construction method can protect the initial structure of the arch ring to the maximum extent, so that the stress mechanism of the arch ring is not damaged. (3) The arch ring stress after being reinforced by the mode is buffered layer by layer when being transmitted, and the reinforced structure or the arch ring can not be damaged due to the sudden increase of the bearing capacity of the bridge deck. (4) The arch bridge reinforcing structure and the construction method thereof have the advantages of low cost, short construction period, low operation difficulty of reinforcement and strong practicability.
Drawings
Fig. 1 is a perspective view of the present embodiment.
Fig. 2 is a schematic inverted perspective view of the present embodiment.
Fig. 3 is a schematic front view of the present embodiment.
Fig. 4 is a perspective view illustrating the manner of reinforcing the arch ring according to the embodiment.
The drawings are numbered as follows:
the bridge deck comprises a bridge deck 1, piers 2, arch rings 3, a bearing plate 4, an arch center 5, an arc-shaped supporting beam 6, a cross beam 7, a supporting piece 8, a mounting plate 9 and a small arch center 10.
Detailed Description
The following is further detailed by way of specific embodiments:
as shown in fig. 1, an arch bridge reinforcing structure comprises a bridge deck 1, piers 2 and arch rings 3 of an arch bridge to be reinforced, in this embodiment, the arch bridge may be a single arch ring 3 bridge with a small span or a large span arch bridge with a plurality of piers 2 and a plurality of arch rings 3, a longitudinal beam for supporting is arranged between the arch rings 3 and the bridge deck 1, and the weight is for transmitting the force of the bridge deck 1 to the arch rings 3, the specific reinforcing structure comprises a pressure bearing plate 4 arranged in the middle of the arch rings 3, the pressure bearing plate 4 is arc-shaped, the pressure bearing plate 4 is arranged below the middle of the arch rings 3, the arc-shaped concave surface of the pressure bearing plate 4 is arranged upward, the fixing mode adopts anchoring, both sides of the pressure bearing plate 4 are anchored on the arch rings 3, of course, in order not to cause structural damage to the arch rings 3, both sides of the pressure bearing plate 4 can also be adhered on the arch rings 3 by using reinforced concrete structural adhesive, an arch frame 5 for supporting the pressure bearing plate 4 is arranged below the pressure bearing plate 4, the both ends of bow member 5 are fixed on pier 2, the middle part fixed connection of the lower surface of the protruding end middle part of bow member 5 and bearing plate 4, what fixed connection's mode adopted is the welding, preferably, can not cause local pressure too big and damage because of the power transmission in order to make pier 2, upper portion at pier 2 or the outside of whole pier 2 sets up the back up coat, what the back up coat mainly adopted is reinforced concrete structure, the fixed cladding of reinforcing bar is in the outside of original pier 2, then at the outside construction reinforced form board of reinforcing bar, then pour concrete in to the template, until the concrete setting.
In order to make the bearing plate 4 better perform the function of force transmission, a pressure transmission element is arranged in the installation gap between the bearing plate 4 and the arch ring 3, in this embodiment, the pressure transmission element is a rubber block, the rubber block fills the installation gap between the bearing plate 4 and the arch ring 3, the rubber block has good buffering performance and can buffer the force applied to the bridge deck 1 and transmit the force to the reinforcing device below, preferably, the pressure transmission element can also be a combination of a steel reinforcement cage and concrete, and the pressure transmission element is beneficial in that the steel reinforcement cage and concrete combination can form a whole with the arch ring 3, so that the force applied to the bridge deck 1 and the arch ring 3 can be better and more directly transmitted.
As shown in fig. 2 to 4, in order to further improve the arch bridge reinforcing performance and protect the arch bridge better, an arc support beam 6 is further arranged below the bearing plate 4, the arc support beams 6 are stacked and arranged on two sides of the arch ring 3, one end of each arc support beam 6 is welded and fixed on the side surface of the bearing plate 4, the other end of each arc support beam 6 is fixed on the reinforcing layer of the pier 2, in the position design, the arc support beam 6 is arranged between two adjacent arch frames 5, the installation distance of the arch frames 5 is determined by the actual width of the arch frame 5, in the embodiment, the width of the arch ring 3 is 6 meters, the installation distance of the arch frames 5 is 1 meter, in order to enable the middle part and the rest parts of the arch ring 3 to better transmit force, a cross beam 7 anchored on the middle part of the arch ring 3 is arranged, the length of the cross beam 7 is consistent with the width of the arch ring 3, a support member 8 is arranged between the arch ring 3 and the arc support beam 6, support piece 8 slope sets up, and support piece 8's both ends are fixed in respectively on crossbeam 7 and the middle part of arc supporting beam 6, and such benefit lies in, and support piece 8 can in time transmit the power on the arch ring 3, and the deformation of arc supporting capacity can cushion power, also provides a holding power for arch ring 3 simultaneously, and then further strengthens arch ring 3's bearing capacity. Preferably, the support member 8 is a damper, and the damper is an oil damper, which has the advantage that the damper can further achieve a buffering effect, and the buffering effect of the oil damper is better.
In order to avoid the over-large stress of the arc-shaped supporting beam 6 and the over-large deformation, the supporting capacity of the arc-shaped supporting beam 6 on the two sides of the bearing plate 4 is weakened, the mounting plates 9 are welded on the arc-shaped supporting beams 6 on the two sides of the bearing plate 4, a plurality of groups of small arches 10 are arranged between the mounting plates 9 on the two sides at equal intervals, two ends of each small arch 10 are welded with the mounting plates 9 on the two sides, and the top of each small arch 10 is in close contact with the center of the bottom of the bearing plate 4, the bridge support structure has the advantages that when the arc-shaped supporting beam 6 is subjected to the over-large external force, the arc-shaped supporting beam 6 can be bent, namely, the displacement is generated towards the center of the arch ring 3, the supporting effect on the bridge is weakened, the small arch 10 can limit the deformation and the displacement of the arc-shaped supporting beam 6, the arc-shaped supporting beam 6 can better transmit the received force to the bridge pier 2, and the force is better transmitted to the bridge pier 2 while the stress of the arch ring 3 is reduced.
The invention aims to further disclose a construction method of the arch bridge reinforced structure, which comprises the following construction steps:
A. anchoring the pressure bearing plate 4 in the middle of the arch ring 3;
B. a space formed by the bearing plate 4 and the arch ring 3 is filled with a rubber block, so that the rubber block is tightly contacted with the bearing plate 4 and the arch ring 3;
C. an arch center 5 is arranged below the arch ring 3, so that two ends of the arch center 5 are fixedly connected to the bridge piers 2, and the upper end of the arch center 5 is tightly contacted with the middle part of the lower end of the arch ring 3;
D. installing an arc-shaped support beam 6 in the middle of the adjacent arch center 5, fixedly connecting two ends of the arc-shaped support beam 6 with the bridge pier 2, and tightly contacting the upper end of the arc-shaped support beam 6 with the middle of the arch ring 3;
E. the mounting plates 9 are welded on the arc-shaped supporting beams 6 on the two sides of the arch ring 3, and the arc-shaped supporting beams 6 on one side of the arc are connected in series by the mounting plates 9;
F. a small arch frame 10 is arranged on the arc-shaped support beam 6 below the same arch ring 3, two ends of the small arch frame 10 are welded on the mounting plate 9, and the small arch frame 10 is positioned between the adjacent arch frames 5;
G. a cross beam 7 is fixedly installed in the middle of the arch ring 3, and the cross beam 7 is fixedly connected with the middle of the arch ring 3 in a bar planting mode;
H. and a support member 8 is obliquely arranged between the cross beam 7 and the arc-shaped support beam 6, and two ends of the support member 8 are respectively fixed at the middle parts of the cross beam 7 and the arc-shaped support beam 6.
The method specifically comprises the following steps:
A. determining the width of a pressure bearing plate 4 according to the span of the arch ring 3, wherein the width of the pressure bearing plate 4 is one fifth of the width of the arch ring 3, and anchoring the two sides of the pressure bearing plate 4 or fixing the pressure bearing plate 4 in the middle of the arch ring 3 by adopting reinforced concrete structural adhesive;
B. filling a rubber block in an installation gap between the arch ring 3 and the bearing plate 4, wherein the rubber block is tightly contacted with the bearing plate 4 and the arch ring 3, or implanting reinforcing steel bars into the arch ring 3, welding a reinforcing steel bar cage on the reinforcing steel bars, then sealing two ends of the installation gap formed by the bearing plate 4 and the arch ring 3, and then pouring concrete until the concrete is solidified;
C. an arch center 5 is arranged below a bearing plate 4 after concrete is solidified, two ends of the arch center 5 are fixedly connected to a pier 2, the upper end of the arch center 5 is tightly contacted with the middle of the lower end of an arch ring 3, a reinforcing layer is added to the middle of the pier 2 or the whole pier 2 before the arch center 5 is installed, the reinforcing layer is reinforced by adopting reinforced concrete, specifically, coated reinforcing steel bars are fixed on the extra side of the pier 2, then a mould is reinforced on the outer side of the reinforcing steel bars, and then concrete is poured in the mould until the concrete is solidified;
D. installing an arc-shaped support beam 6 in the middle of the adjacent arch center 5, fixedly connecting the two ends of the arc-shaped support beam 6 with the reinforcing layer of the pier 2, enabling the upper end of the arc-shaped support beam 6 to be tightly contacted with the middle of the arch ring 3, and enabling the concave surface of the arc-shaped support beam 6 to be installed upwards;
E. the mounting plates 9 are welded on the arc-shaped supporting beams 6 on the two sides of the arch ring 3, the arc-shaped supporting beams 6 on one side are connected in series by the mounting plates 9, and the mounting plates 9 are positioned on the middle parts of the protruding surfaces of the arc-shaped supporting beams 6;
F. the method is characterized in that small arch frames 10 are installed on arc-shaped supporting beams 6 below the same arch ring 3, two ends of each small arch frame 10 are welded on a mounting plate 9, each small arch frame 10 is located between adjacent arch frames 5, each small arch frame 10 is fixed on the corresponding mounting plate 9 in a welding mode, and when the small arch frames 10 are installed, the small arch frames 10 apply pre-tightening force to the arc-shaped supporting beams 6, so that the arc-shaped supporting beams 6 are rubbed towards two sides of the corresponding arch ring 3 to have pre-tightening thrust forces, and the method has the advantage of providing better pressure bearing capacity for the arc-shaped supporting beams 6;
G. a cross beam 7 is fixedly installed in the middle of the arch ring 3, the cross beam 7 is fixedly connected with the middle of the arch ring 3 in a bar planting mode, and of course, the cross beam can be fixedly connected in an anchoring mode or a reinforced concrete structural adhesive mode;
H. the support piece 8 is obliquely arranged between the cross beam 7 and the arc-shaped support beam 6, the two ends of the support piece 8 are respectively fixed in the middle of the cross beam 7 and the arc-shaped support beam 6, and the support piece 8 is preferably a hydraulic damper, so that the hydraulic damper has the advantages of better damping effect and lower cost, and can be replaced by a steel pipe with a thicker diameter, preferably the hydraulic damper.
Preferably, the step B may further be filled with a combination of a steel reinforcement cage and concrete, and before the step B is performed, the lower surface of the middle portion of the arch ring needs to be roughened, which is beneficial in that the roughening can make the connection between the combination of the steel reinforcement cage and concrete and the arch ring 3 more stable and tight, and make the combination of the steel reinforcement cage and concrete and the common arch ring form a whole, so that the combination can better transmit force.
Preferably, the roughening treatment before the step B is specifically to scrape horizontal grains and longitudinal grains in the middle of the lower surface of the arch ring by using a steel brush, and the method has the advantages that the roughening method is simple, the rivet pulling cost is low, and the roughening rate block can shorten the arch bridge reinforcing period.
In summary, the working principle of the invention is as follows: when a large load is applied to the bridge floor 1, the bridge floor 1 transmits the force and the bending moment applied to the arch ring 3, the arch ring 3 generates a vertical downward force and transmits and disperses the force along the arch ring 3 to transmit the force to the piers 2, when the force applied to the arch ring 3 is large, the arch ring 3 deforms downward and acts on a rubber block or a combination of a steel reinforcement cage and concrete arranged above the bearing plate 4 to transmit the force, at the moment, the arch frame 5 provides an upward supporting force for the arch ring 3 and transmits the force to the piers 2, meanwhile, the arch frame 5 also deforms to continuously transmit the force downward to the arc supporting beams 6, the arc supporting beams 6 further deform and buffer and transmit the force to the piers 2, and if the deformation of the arc supporting beams 6 is too large, the small arch ring 3 limits the deformation of the arc supporting beams 6 by the force, make the rigidity of arc supporting beam 6 promote, better with power transmission to bridge segment on, because reinforced concrete reinforcement is passed through on the upper portion of bridge segment, 2 bearing capacity of pier obtain promoting, simultaneously also can not receive the damage because the local stress who receives is great, 3 mid-mounting's of arch ring support piece 8 then can be to the rest positions of arch ring 3 cushion and the transmission that have received, and support beam 6 provides a holding power through the arc, guarantee that the atress on 3 each positions of arch ring can both transmit and cushion, with the bearing capacity of reinforcing arch ring 3, make the arch bridge after the reinforcement use safer.
The technical effects obtained by the invention are as follows: (1) the bearing capacity of the arch ring 3 is improved by installing the pressure bearing plates 4, the arch center 5, the arc-shaped supporting beams 6, the supporting pieces 8 and other reinforcing pieces below the arch ring 3, so that the reinforced bridge is safer to use. (2) The construction method disclosed above can protect the initial structure of the arch ring 3 to the maximum extent, so that the stress mechanism of the arch ring 3 is not damaged. (3) The arch ring 3 after being reinforced by the mode is subjected to layer-by-layer buffering in the process of transferring, and the reinforced structure or the arch ring 3 cannot be damaged due to sudden increase of the bearing capacity of the bridge deck 1. (4) The arch bridge reinforcing structure and the construction method thereof have the advantages of low cost, short construction period, low operation difficulty of reinforcement and strong practicability.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.
Claims (10)
1. The arch bridge reinforcing structure comprises a bridge deck (1), piers (2) and arch rings (3), and is characterized in that the lower surface of the arch crown of each arch ring (3) is provided with a curved pressure bearing plate (4), the two sides of each pressure bearing plate (4) are anchored on the arch rings (3), the protruding ends of the pressure bearing plates (4) are installed downwards, pressure transmission elements are arranged between the sunken ends of the pressure bearing plates (4) and the inner walls of the arch crown of each arch ring (3), the pressure transmission elements are filled in spaces formed by the arch rings (3) and the pressure bearing plates (4) and are in close contact with the surfaces of the pressure bearing plates (4) and the arch rings (3), a plurality of arch frames (5) arranged at certain intervals are arranged below the pressure bearing plates (4), the middle parts of the arch frames (5) are in close contact with the middle parts of the pressure bearing plates (4), the two ends of the arch frames (5) are fixed on the piers (2) at the two sides by adopting a reinforced concrete structure, all be equipped with arc supporting beam (6) between the adjacent bow member (5) in both sides of bearing plate (4), arc supporting beam (6) symmetry sets up in the both sides of bearing plate (4), and on the one end of arc supporting beam (6) was fixed in the side of bearing plate (4), the other end was fixed in on pier (2), the middle part lateral wall top of hunch circle (3) was equipped with fixed connection's crossbeam (7) with it, the slope is equipped with support piece (8) between crossbeam (7) and the arc supporting beam (6), the both ends and crossbeam (7) and the arc supporting beam (6) fixed connection of support piece (8).
2. An arch bridge reinforcement structure according to claim 1, wherein the pressure transfer element is a rubber block.
3. An arch bridge reinforcement structure according to claim 1, wherein said pressure transmission element is a combination of a steel reinforcement cage and concrete.
4. An arch bridge reinforcement structure according to claim 1, wherein the support (8) is a damper and the damper is an oil damper.
5. An arch bridge reinforced structure, according to claim 1, characterized in that, the mounting plate (9) is welded on the arc supporting beam (6) on both sides of the bearing plate (4), a plurality of sets of small arches 10 are arranged between the mounting plates (9) on both sides at equal intervals, both ends of the small arches 10 are welded with the mounting plates (9) on both sides, and the top of the small arches 10 is closely contacted with the bottom center of the bearing plate (4).
6. An arch bridge reinforcement structure according to claim 5, wherein the protruding ends of the arched support beams (6) are directed towards the middle of the arch bridge.
7. An arch bridge reinforcement structure according to claim 1, characterized in that a reinforced concrete reinforcement layer is provided on the upper portion of the pier (2).
8. The arch bridge reinforcing construction method is characterized by comprising the following construction steps:
A. anchoring the pressure bearing plate (4) in the middle of the arch ring (3);
B. a space formed by the bearing plate (4) and the arch ring (3) is filled with a rubber block, so that the rubber block is tightly contacted with the bearing plate (4) and the arch ring (3);
C. an arch center (5) is arranged below the arch ring (3), so that two ends of the arch center (5) are fixedly connected to the pier (2), and the upper end of the arch center (5) is tightly contacted with the middle part of the lower end of the arch ring (3);
D. an arc-shaped supporting beam (6) is arranged in the middle of the adjacent arch centering (5), two ends of the arc-shaped supporting beam (6) are fixedly connected with the pier (2), and the upper end of the arc-shaped supporting beam (6) is tightly contacted with the middle of the arch ring (3);
E. the mounting plates (9) are welded on the arc-shaped supporting beams (6) on the two sides of the arch ring (3), and the arc-shaped supporting beams (6) on one side are connected in series by the mounting plates (9);
F. small arch centering 10 is arranged on an arc-shaped supporting beam (6) below the same arch ring (3), two ends of the small arch centering 10 are welded on a mounting plate (9), and the small arch centering 10 is positioned between adjacent arch centering (5);
G. a cross beam (7) is fixedly installed in the middle of the arch ring (3), and the cross beam (7) is fixedly connected with the middle of the arch ring (3) in a rib planting mode;
H. a supporting piece (8) is obliquely arranged between the cross beam (7) and the arc-shaped supporting beam (6), and two ends of the supporting piece (8) are respectively fixed in the middle of the cross beam (7) and the arc-shaped supporting beam (6).
9. The arch bridge reinforcement construction method according to claim 8, wherein step B is performed by roughening the lower surface of the middle portion of the arch ring (3) before step B is performed, wherein the composition of the reinforcement cage and the concrete is filled in step B.
10. The arch bridge reinforcement construction method according to claim 8, wherein the roughening treatment before the step B is to scrape horizontal lines and vertical lines on the middle part of the lower surface of the arch ring (3) by using a steel brush.
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| IT1281031B1 (en) * | 1995-11-17 | 1998-02-11 | Carlo Chiaves | PREFABRICATED STRUCTURE FOR THE REALIZATION OF WORKS BUILT IN OPEN SKY, PARTICULARLY FOR HIGHWAY OVERRIDE, |
| JP4567794B2 (en) * | 2009-02-13 | 2010-10-20 | 有限会社吉本本家石材店 | Stone bridge railing reinforcement structure |
| CN205474875U (en) * | 2015-12-31 | 2016-08-17 | 长安大学 | Masonry arch bridge reinforced structure |
| CN106284106B (en) * | 2016-08-30 | 2019-01-01 | 武汉二航路桥特种工程有限责任公司 | A kind of double curvature arch bridge arch compound sleeve arch reinforcement means |
| CN106677079B (en) * | 2017-01-09 | 2018-06-01 | 广西交通科学研究院有限公司 | The continuous arch bridge reinforcement means reduced based on arch bridge impost horizontal thrust |
| CN109281257B (en) * | 2018-11-02 | 2020-07-28 | 中交鹭建有限公司 | Reinforced concrete arch bridge and bridge deck reinforcing device |
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2020
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