CN114775461A - Concrete bridge widening and reinforcing structure and construction method thereof - Google Patents

Abstract

The invention discloses a concrete bridge widening and reinforcing structure and a construction method thereof, wherein the concrete bridge widening and reinforcing structure comprises a bridge pier body, a cover beam and a widening section, the bridge pier body is arranged at the bottom of the bridge pier body, the bridge pier body is provided with an overhanging part, the overhanging part is positioned on the outer side of the bridge pier body, the bridge pier is connected with the bridge pier body and positioned on the outer peripheral side of the bridge pier body, the cover beam is positioned on the outer peripheral side of the bridge pier, one end of the cover beam is connected with the top end of the bridge pier, the other end of the cover beam extends in a direction far away from the bridge pier, the top surface of the cover beam is flush with the top surface of the bridge pier, the end surface of the other end of the cover beam extends outwards out of the bridge pier body, the widening section is connected with the cover beam, the top surface of the widening section is provided with a groove, the overhanging part is matched in the groove, and the top surface of the widening section is flush with the top of the overhanging part. The concrete bridge widening and reinforcing structure provided by the embodiment of the invention has the advantages of low cost, short construction period and the like.

Description

Concrete bridge widening and reinforcing structure and construction method thereof

Technical Field

The invention relates to the field of bridge structural engineering, in particular to a concrete bridge widening and reinforcing structure and a construction method thereof.

Background

With the improvement of the economic level of China and the acceleration of urbanization pace, the number of motor vehicles is continuously increased, great pressure is applied to the traffic of urban roads, the traffic capacity of urban bridges built in early stages tends to be saturated, and the current traffic flow demand can not be met any more. If the method of dismantling and rebuilding is adopted, the existing traffic roads are occupied for a long time, great difficulty is brought to traffic dispersion, and the construction cost is extremely high due to the problems of limited construction site, short construction period and the like. Therefore, the existing bridge needs to be upgraded and modified.

In the related technology, the widening and reinforcing method for the concrete bridge adopts the same type of prefabricated components or cast-in-place components to be spliced with the original structure to form a whole. The method is simple in design, but high in construction cost, large in construction risk, long in construction period, large in influence on road traffic, difficult to implement at busy traffic intersections, and incapable of being applied to complex overpasses.

Disclosure of Invention

The present invention is directed to solving, at least in part, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides a concrete bridge widening and reinforcing structure which is low in cost, short in construction period and small in influence on lower traffic.

The embodiment of the invention also provides a construction method for widening and reinforcing the concrete bridge, which has low cost and short construction period.

The concrete bridge widening and reinforcing structure provided by the embodiment of the invention comprises the following components:

the bridge comprises a bridge pier body and a bridge body, wherein the bridge pier body is arranged at the bottom of the bridge body, the bridge body is provided with an overhanging part, and the overhanging part is positioned on the outer side of the bridge pier body;

the bridge pier is connected with the bridge pier body and is positioned on the outer peripheral side of the bridge pier body;

the bent cap is positioned on the outer peripheral side of the pier, one end of the bent cap is connected with the top end of the pier, the other end of the bent cap extends in the direction far away from the pier, the top surface of the bent cap is flush with the top surface of the pier, and the end surface of the other end of the bent cap extends out of the bridge body;

the widening section, the widening section with the bent cap links to each other, the top surface of widening section has the recess, the cooperation of the portion of encorbelmenting is in the recess, the top surface of widening section with the top parallel and level of the portion of encorbelmenting.

The concrete bridge widening and reinforcing structure provided by the embodiment of the invention has the advantages of low cost, short construction period, no influence on lower traffic and the like.

In some embodiments, the bridge pier comprises a bridge pier shell and a bridge pier reinforcing layer, wherein the bridge pier shell is sleeved on the outer peripheral side of the bridge pier body so as to define a first cavity with the outer peripheral wall of the bridge pier body, and the bridge pier reinforcing layer is arranged in the first cavity.

In some embodiments, a grouting hole is formed in the pier shell, and the grouting hole is communicated with the first cavity.

In some embodiments, the pier still includes first connecting piece and second connecting piece, first connecting piece is established on the pier body, the second connecting piece is established on the pier casing, just first connecting piece with the second connecting piece all is buried underground in the pier reinforcing layer, first connecting piece with the second connecting piece is a plurality of, and is a plurality of first connecting piece is in interval arrangement on the periphery wall of pier body is a plurality of the second connecting piece is in interval arrangement on the internal perisporium of pier casing.

In some embodiments, the capping beam comprises a capping beam shell coupled to the pier shell, the capping beam shell having a second cavity.

In some embodiments, the capping beam shell further comprises a partition plate, the partition plate is arranged in the second cavity, and the partition plate and the bridge pier are arranged at intervals in the extension direction of the capping beam.

In some embodiments, the widening section includes a box girder and a bridge deck, the box girder is arranged between the cover girder and the bridge deck, a part of the bridge deck is located below the overhanging portion and connected with the overhanging portion, and a projection of the bridge deck is larger than a projection of the box girder in a plane where a top surface of the bridge deck is located.

In some embodiments, the widened section further comprises an end plate, the box girder has a box girder top plate, the end plate is connected with the box girder top plate, the end plate, the box girder top plate and the overhanging portion define the groove, and the groove is filled with concrete so as to form the bridge deck.

In some embodiments, the concrete bridge widening and reinforcing structure further comprises a third connecting piece and a fourth connecting piece, wherein the third connecting piece is arranged on the overhanging portion, the fourth connecting piece is arranged on the box girder top plate, the third connecting piece and the fourth connecting piece are both embedded in the bridge deck, the third connecting piece and the fourth connecting piece are both in a plurality, the third connecting pieces are arranged on the overhanging portion at intervals, and the fourth connecting pieces are arranged on the box girder top plate at intervals.

The construction method of the concrete bridge widening and reinforcing structure comprises the following steps:

sleeving a pier shell on the outer peripheral side of the pier body;

pouring concrete between the pier shell and the pier body so as to form a pier reinforcing layer;

arranging a bent cap shell on the top of the pier body and the pier reinforcing layer;

pouring concrete into the cover beam shell;

a widening section is provided above the capping beam shell to widen the deck.

Drawings

Fig. 1 is a schematic structural view of a pier body and a bridge body of a concrete bridge widening and reinforcing structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a concrete bridge widening and reinforcing structure according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a pier and a pier body of a concrete bridge widening and reinforcing structure according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a pier, a pier body and a capping beam of a concrete bridge widening and reinforcing structure according to an embodiment of the present invention.

Fig. 5 is a schematic structural view of a pier and a capping beam of a concrete bridge widening and reinforcing structure according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a capping beam of a concrete bridge widening and reinforcing construction according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a bridge body and a widening section of a concrete bridge widening and reinforcing structure according to an embodiment of the invention.

Reference numerals are as follows:

a concrete bridge widening and reinforcing construction 100;

a pier body 101; a bridge body 102; an overhang 1020; an original support 103;

a pier 1; a pier casing 11; a first top plate 111; side panels 112; a first base plate 113; a pier reinforcing layer 12; a first cavity 13; a first connecting member 14; a second connecting member 15;

a capping beam 2; a cap shell 23; a second cavity 230; the second top plate 231; a second base plate 232; a first web 233; a second web 234; a cap end plate 235; a first partition 236; a first stiffener 237; a fifth connecting member 238; a first capping beam 21; a second capping beam 22;

a widening section 3; a recess 30; a first widened section 31; a first bridge deck 311; a second widened section 32; a second deck 321; the box girder 33; a box girder top plate 331; a second partition 332; a manhole 3320; second stiffeners 333; an end plate 34; a third connecting member 35; a fourth connecting member 36;

a support 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1 to 7, a concrete bridge widening and reinforcing structure 100 according to an embodiment of the present invention includes a pier body 101, a bridge body 102, a pier 1, a capping beam 2, and a widening section 3,

the pier body 101 is provided at the bottom of the bridge body 102, and the bridge body 102 has an overhanging portion 1020, and the overhanging portion 1020 is located outside the pier body 101.

The pier 1 is connected to the pier body 101 and located on the outer circumferential side of the pier body 101.

The bent cap 2 is located the periphery side of pier 1, and the one end of bent cap 2 links to each other with the top of pier 1, and the other end of bent cap 2 extends along the direction of keeping away from pier 1, and the top surface of bent cap 2 and the top surface parallel and level of pier 1, the terminal surface of the other end of bent cap 2 outwards stretches out bridge body 102.

Widen section 3 and bent cap 2 and link to each other, the top surface of widening section 3 has recess 30, and the portion 1020 cooperation of encorbelmenting is in recess 30, and the top surface of widening section 3 and the top parallel and level of the portion 1020 of encorbelmenting.

In order to make the technical solution of the present application more easily understood, the technical solution of the present application will be further described below by taking an example in which the height direction of the pier body 101 coincides with the up-down direction, and an example in which the extending direction of the cap beam 2 coincides with the left-right direction, wherein the left-right direction and the up-down direction are as shown in fig. 1.

For example, as shown in fig. 1, the original bridge includes a bridge pier body 101 and a bridge body 102, an original support 103 is provided between the bridge pier body 101 and the bridge body 102, overhanging portions 1020 are provided on both the left and right sides of the bridge body 102, the overhanging portions 1020 extend to the outside of the bridge body 102, that is, the overhanging portion 1020 on the left side of the bridge body 102 extends to the left side, and the overhanging portion 1020 on the right side of the bridge body 102 extends to the right side. The pier 1 is surrounded on the outer circumferential side of the pier body 101, and the pier 1 is in accordance with the height of the pier body 101 and is connected to the pier body 101 so as to reinforce the pier body 101.

The top at pier 1 is established to bent cap 2, and extend along left right direction, the one end of bent cap 2 links to each other with pier 1, the other end of bent cap 2 is the free end, the free end outwards stretches out bridge body 102, be equipped with widening section 3 on the free end of bent cap 2, the lower extreme of widening section 3 links to each other with the free end of bent cap 2, the top surface and the 1020 parallel and level of portion of encorbelmenting of widening section 3, the diapire cooperation of a part diapire or the whole portion of encorbelmenting 1020 of portion 1020 of encorbelmenting is in recess 30, and with widening section 3 fixed linking to each other, thereby make the combination that widening section 3 and portion 1020 of encorbelmenting can stabilize be in the same place, and then widen the bridge floor of former bridge.

Alternatively, the cap girders 2 include first and second cap girders 21 and 22, the widening section 3 includes first and second widening sections 31 and 32, the first cap girder 21 is provided at the left side of the pier 1, the second cap girder 22 is provided at the right side of the pier 1, the first widening section 31 is connected to the first cap girder 21 and is positioned at the left side of the pier body 101 to widen the left side of the bridge floor, and the second widening section 32 is connected to the second cap girder 22 and is positioned at the right side of the pier body 101 to widen the right side of the bridge floor.

In the related technology, the widening and reinforcing method for the concrete bridge adopts the same type of prefabricated components or cast-in-place components to be spliced with the original structure to form a whole. The method is simple in design, but high in construction cost, high in construction risk, long in construction period, large in influence on road traffic, difficult to implement at busy traffic intersections, and incapable of being applied to complex overpasses.

In the construction of a concrete bridge widening and reinforcing structure 100 according to an embodiment of the present invention, concrete is first poured on the outer circumferential side of a pier body 101 to form a pier 1, then concrete is built above the pier 1 to form a capping beam 2, and finally concrete is poured above the capping beam 2 to form a widened section 3, thereby forming a widened deck.

According to the widening and reinforcing structure 100 for the concrete bridge, provided by the embodiment of the invention, the pier 1, the cover beam 2 and the widening section 3 are additionally arranged outside the original bridge, so that the original bridge is widened and reinforced, and the original concrete bridge is upgraded and reformed. Compared with the related technologies, the concrete bridge widening and reinforcing structure 100 provided by the embodiment of the invention has the advantages of low construction cost, short construction period, no need of occupying the existing road or large-scale machine and tool equipment, small influence on the existing bridge and the surrounding road, high construction safety, high bearing capacity of the modified structure, high rigidity and strong anti-overturning capacity.

Therefore, the concrete bridge widening and reinforcing structure 100 provided by the embodiment of the invention has the advantages of low cost, short construction period, no influence on lower traffic and the like.

In some embodiments, the pier 1 comprises a pier shell 11 and a pier reinforcing layer 12, wherein the pier shell 11 is sleeved on the outer peripheral side of the pier body 101 so as to define a first cavity 13 with the outer peripheral wall of the pier body 101, and the pier reinforcing layer 12 is arranged in the first cavity 13.

For example, as shown in fig. 3 and 4, the pier shell 11 is sleeved on the outer peripheral side of the pier body 101, the lower end of the pier shell 11 is fixed on the ground, the upper end of the pier shell 11 is connected with the top end of the pier body 101, a first cavity 13 is defined between the pier shell 11 and the pier body 101, and the pier reinforcing layer 12 is located in the first cavity 13, so that the pier body 101 can be reinforced by the pier reinforcing layer 12, thereby enhancing the structural strength of the pier body 101.

It is understood that in other embodiments, the bottom of the pier shell 11 may be disposed at a certain height from the ground, i.e., only the pier reinforcing layer 12 is disposed on the top of the pier body 101, thereby saving costs.

Alternatively, the pier shell 11 is cylindrical or rectangular cuboid or the like.

In some embodiments, pier shell 11 is provided with a grout hole, which communicates with first cavity 13. From this, pour the concrete into first cavity 13 through the grout hole, thereby form pier reinforcing layer 12 after the concrete sets up, and then realize the reinforcement to pier body 101. The pier shell 11 is disposed outside the pier reinforcing layer 12, so that the structural strength of the pier reinforcing layer 12 can be improved, and the pier reinforcing layer 12 can be protected, thereby protecting the pier body 101.

Alternatively, the grouting holes are provided in plurality, and the grouting holes are located at the top of the pier shell 11.

In other embodiments, the pier shell 11 includes a first top plate 111, a side plate 112, and a first bottom plate 113, the side plate 112 extends in the up-down direction and is spaced apart from the pier body 101, the top of the side plate 112 is connected to the first top plate 111, the bottom of the side plate 112 is connected to the first bottom plate 113, and the pier shell 11 is plural, and the plurality of pier shells 11 are surrounded in a circle at the outer circumferential side of the pier body 101 so as to define the first cavity 13 with the outer circumferential wall of the pier body 101.

For example, two pier housings 11 are provided, the side plates 112 have a semicircular cross section, and grouting holes are provided in the first top plate 111. During construction, firstly, one group of side plates 112, the first top plate 111 and the first bottom plate 113 are welded together, secondly, the other group of side plates 112, the first top plate 111 and the first bottom plate 113 are welded together, then, the two groups of pier shells 11 are arranged on the outer periphery side of the pier body 101, then, the joints of the two groups of pier shells 11 are welded so as to form the first cavity 13, and finally, concrete is poured into the first cavity 13 from the grouting holes so as to form the pier reinforcing layer 12.

Alternatively, the first top plate 111 is fixed to the top end of the pier 1 by adhesion. For example, epoxy mortar is applied to the top end of the pier 1, and the first top plate 111 is bonded to the top surface of the pier 1 by the adhesive force of the epoxy mortar.

Alternatively, the pier shell 11 is made of a steel plate.

In other embodiments, before construction, a chiseling process is performed on the outer circumferential wall of the pier body 101, and the chiseling shape is a zigzag shape, so that the pier reinforcing layer 12 and the pier body 101 can be firmly bonded together, thereby improving the structural strength of the concrete bridge widening and reinforcing structure 100.

In some embodiments, the pier 1 further comprises a first connecting member 14 and a second connecting member 15, the first connecting member 14 is provided on the pier body 101, the second connecting member 15 is provided on the pier housing 11, and both the first connecting member 14 and the second connecting member 15 are embedded in the pier reinforcing layer 12, the first connecting member 14 and the second connecting member 15 are plural, the plurality of first connecting members 14 are arranged at intervals on the outer circumferential wall of the pier body 101, and the plurality of second connecting members 15 are arranged at intervals on the inner circumferential wall of the pier housing 11.

For example, as shown in fig. 3, the first connection member 14 is provided on an outer circumferential wall of the pier body 101, the second connection member 15 is provided on an inner circumferential wall of the pier housing 11, the plurality of first connection members 14 are spaced apart on the outer circumferential wall of the pier body 101, the plurality of second connection members 15 are spaced apart on the inner circumferential wall of the pier housing 11, the first connection members 14 and the second connection members 15 are each located in the first cavity 13, and concrete is poured into the first cavity 13 to form the pier reinforcing layer 12. After the pier reinforcing layer 12 is formed, one end of the first connection member 14 is within the pier reinforcing layer 12, the other end of the first connection member 14 is connected to the pier body 101, one end of the second connection member 15 is within the pier reinforcing layer 12, and the other end of the second connection member 15 is connected to the pier shell 11. Thus, the first connecting member 14 facilitates the reinforcement of the connection between the pier reinforcing layer 12 and the pier body 101; the second connecting member 15 is used for facilitating the connection between the pier reinforcing layer 12 and the pier shell 11; the first and second connection members 14 and 15 facilitate reinforcing the connection between the pier shell 11, the pier reinforcing layer 12, and the pier body 101, thereby reinforcing the pier body 101.

Optionally, the first connecting member 14 is a steel bar, when the steel bar is installed on the pier body 101, a hole is drilled in the outer circumferential wall of the pier body 101, then the first connecting member 14 is inserted, and finally the modified epoxy structural adhesive is poured into the hole, so that the first connecting member 14 can be anchored in the pier body 101.

Optionally, the second connection member 15 is a shear connection member, for example, the second connection member 15 is a peg or a T-shaped steel plate.

In some embodiments, the capping beam 2 includes a capping beam shell 23, the capping beam shell 23 is coupled to the pier shell 11, and the capping beam shell 23 has a second cavity 230.

For example, as shown in fig. 4 and 5, one end of the shell 23 is fixedly connected to the pier shell 11, the first shell 21 includes a first shell, the second shell 22 includes a second shell, a right end of the first shell is fixedly connected to a left side wall of the pier shell 11, and a left end of the second shell is fixedly connected to a right side wall of the pier shell 11. In the shell 23 of the cap beam there is a cavity into which concrete is poured to form the cap beam 2.

It should be noted that the bent cap shell 23 and the pier shell 11 are fixed together by bolting or welding, and thus the pier shell 11 can provide support for the bent cap shell 23, thereby improving the structural strength between the bent cap shell 23 and the pier shell 11, and further improving the structural strength of the concrete bridge widening and reinforcing structure 100.

For convenience of description, the structure of the lintel housing 23 will be described below with the direction perpendicular to the direction of extension of the lintel housing 23 being the front-to-rear direction, which is shown in fig. 6.

In other embodiments, as shown in fig. 5 and 6, the shell 23 includes a second top plate 231, a second bottom plate 232, a first web 233, a second web 234, and a shell end plate 235, the second top plate 231 and the second bottom plate 232 are spaced and disposed opposite to each other in the up-down direction, the first web 233 and the second web 234 are located between the second top plate 231 and the second bottom plate 232, the first web 233 and the second web 234 are spaced and disposed opposite to each other in the front-rear direction, the shell end plate 235 is disposed on a side of the shell 23 away from the pier 1, and the second top plate 231, the second bottom plate 232, the first web 233, the second web 234, and the shell end plate 235 define the second cavity 230 together with the pier shell 11.

Optionally, a fifth connecting member 238 is disposed on the second bottom plate 232 and extends in the up-and-down direction, the capping beam 2 is formed after concrete is poured into the second cavity 230, an upper end of the fifth connecting member 238 is located in the capping beam 2, and a lower end of the fifth connecting member 238 is connected to the capping beam shell 23, so that the connection between the capping beam 2 and the capping beam shell 23 can be reinforced by using the fifth connecting member 238, thereby improving the structural strength of the capping beam 2. The fifth connector 238 is a peg or a T-shaped steel plate.

Optionally, a first stiffening rib 237 is arranged on the first web plate 233 and the second web plate 234, the first stiffening rib 237 is made of a steel strip, and the first stiffening rib 237 can improve the structural strength of the first web plate 233 and the second web plate 234, so as to improve the structural strength of the cap beam 2.

In some embodiments, the capping shell 23 further comprises a first diaphragm 236, the first diaphragm 236 being provided in the second cavity 230, the first diaphragm 236 being arranged spaced from the pier 1 in the extension direction of the capping 2.

For example, as shown in fig. 5 and 6, a first partition 236 is provided in the second cavity 230, the first partition 236 is connected to the shell 23, the pier shell 11, the first partition 236, and the end plate 235 are spaced in the left-right direction, and a plane of a surface of the first partition 236 is perpendicular to the extending direction of the shell 2, that is, a surface of the first partition 236 is perpendicular to the left-right direction. Thus, the structure of the bent cap case 23 can be reinforced by the first partition 236, thereby improving the structural strength of the bent cap case 23.

Optionally, the cross-section of the capping beam shell 23 is a box section.

In some embodiments, the widening section 3 comprises a box girder 33 and a bridge deck, the box girder 33 being arranged between the capping beam 2 and the bridge deck, a portion of the bridge deck being located below the overhanging portion 1020 and being connected to the overhanging portion 1020, the projection of the bridge deck being larger than the projection of the box girder 33 in the plane of the top face of the bridge deck.

For example, as shown in fig. 7, the bottom of the box girder 33 is connected to the cover girder 2, and the top of the box girder 33 is provided with a bridge deck. The widening section 3 comprises a first widening section 31 and a second widening section 32, the first widening section 31 is arranged on the left side of the bridge body 102, a first bridge deck 311 is arranged on the first widening section 31, the right end of the first bridge deck 311 is connected with the bridge body 102, and the top surface of the left end of the first bridge deck 311 is a widened bridge deck. The second widening section 32 is arranged on the right side of the bridge body 102, a second bridge deck 321 is arranged on the second widening section 32, the left end of the second bridge deck 321 is connected with the bridge body 102, and the top surface of the right end of the second bridge deck 321 is a widened bridge deck.

One end of the bridge deck is connected to the overhanging portion 1020, the bottom of the bridge deck is positioned on the box girder 33, and the projection of the bridge deck is larger than that of the box girder 33 in the plane formed by the front-back direction and the left-right direction, so that the contact area between the bridge deck and the overhanging portion 1020 is large, the structural strength is high, and the original bridge deck is convenient to widen.

Further, the one end that the decking is close to bridge body 102 links to each other with bridge body 102 of the portion 1020 below of encorbelmenting, is equipped with the bar planting on bridge body 102, is convenient for strengthen the structural strength of decking and bridge body 102.

Alternatively, the bottom of the box girder 33 is provided with the second stiffening rib 333, and the second stiffening rib 333 may improve the structural strength of the box girder 33.

In some embodiments, the widening section 3 further comprises an end plate 34, the box girder 33 has a box girder top plate 331, the end plate 34 is connected to the box girder top plate 331, the end plate 34, the box girder top plate 331 and the overhanging portion 1020 define a groove 30, and the groove 30 is filled with concrete to form a bridge deck.

For example, as shown in fig. 7, the top of the widened section 3 is provided with an end plate 34, the end plate 34 is connected with the top of the box girder 33, the end plate 34, the box girder top plate 331 and the overhanging portion 1020 define a groove 30, concrete is filled in the groove 30 to form a bridge deck, and the surface of the bridge deck is flush with the top of the overhanging portion 1020.

In other embodiments, the second partition 332 is provided inside the box girder 33, the second partition 332 can reinforce the structural strength of the box girder 33, and the manhole 3320 is provided on the second partition 332 to facilitate the access of the constructor into the box girder 33.

In other embodiments, before the extension of the widening section 3, the bottom wall of the overhanging portion 1020 needs to be roughened, so that the bridge deck and the overhanging portion 1020 can be firmly bonded together, thereby improving the structural strength of the concrete bridge widening and reinforcing structure 100.

In some embodiments, a concrete bridge widening and reinforcing structure 100 further includes a third connecting member 35 and a fourth connecting member 36, the third connecting member 35 is disposed on the overhanging portion 1020, the fourth connecting member 36 is disposed on the box girder top plate 331, and both the third connecting member 35 and the fourth connecting member 36 are embedded in the bridge deck, both the third connecting member 35 and the fourth connecting member 36 are plural, the plural third connecting members 35 are arranged at intervals on the overhanging portion 1020, and the plural fourth connecting members 36 are arranged at intervals on the box girder top plate 331.

For example, as shown in fig. 7, a plurality of third connectors 35 are spaced apart on the bottom wall of the overhanging portion 1020, a plurality of fourth connectors 36 are spaced apart on the box girder top plate 331, the third connectors 35 and the fourth connectors 36 are located in the recesses 30, and concrete is poured into the recesses 30 to form bridge decks. After the bridge deck is formed, one end of the third connection member 35 is in the bridge deck, the other end of the third connection member 35 is connected to the overhanging portion 1020, one end of the fourth connection member 36 is in the bridge deck, and the other end of the fourth connection member 36 is connected to the box girder top plate 331. Thus, the third connection member 35 facilitates the reinforcement of the connection between the bridge deck and the overhang 1020; the fourth connecting piece 36 is used for facilitating the connection between the bridge deck and the box girder top plate 331; the connection between the box girder top plate 331, the deck plate and the overhanging portion 1020 is facilitated by the third connecting member 35 and the fourth connecting member 36, thereby reinforcing the overhanging portion 1020 and thus widening the deck.

Optionally, the third connecting member 35 is a bar-planting material, and when the bar-planting material is installed on the overhanging portion 1020, a hole is drilled in the bottom wall of the overhanging portion 1020, the third connecting member 35 is inserted into the hole, and then the modified epoxy structural adhesive is poured into the hole, so that the third connecting member 35 can be anchored in the overhanging portion 1020.

Optionally, the fourth connector 36 is a shear connector, for example, the fourth connector 36 is a peg or a T-shaped steel plate.

In some embodiments, a concrete bridge widening and reinforcing construction 100 further comprises a support 4, the support 4 being provided between the box girder 33 and the capping girder 2.

For example, as shown in fig. 2, there are two supports 4, and the supports 4 are provided between each cap beam 2 and each box beam 33, whereby the influence of the vibration of the deck on the cap beams 2 and the piers 1 is reduced by the supports 4, thereby improving the structural strength of a concrete bridge widening and reinforcing structure 100 and further improving the lifespan of the concrete bridge widening and reinforcing structure 100.

Optionally, the mount 4 is a pot rubber mount 4.

The construction method of the concrete bridge widening and reinforcing structure comprises the following steps:

the pier shell 11 is sleeved on the outer peripheral side of the pier body 102;

pouring concrete between the pier shell 11 and the pier body 102 to form a pier reinforcing layer 12;

arranging a capping beam shell 23 on the tops of the pier body 102 and the pier reinforcing layer 12;

pouring concrete into the bent cap shell 23;

a widening section 3 is provided above the cap beam shell 23 in order to widen the deck.

The construction method for widening and reinforcing the concrete bridge provided by the embodiment of the invention has the advantages of low cost, short construction period, no influence on lower traffic and the like.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A concrete bridge widening and reinforcing structure, comprising:

the bridge comprises a bridge pier body and a bridge body, wherein the bridge pier body is arranged at the bottom of the bridge body, the bridge body is provided with an overhanging part, and the overhanging part is positioned on the outer side of the bridge pier body;

the bridge pier is connected with the bridge pier body and is positioned on the outer peripheral side of the bridge pier body;

the bent cap is positioned on the outer peripheral side of the pier, one end of the bent cap is connected with the top end of the pier, the other end of the bent cap extends in the direction far away from the pier, the top surface of the bent cap is flush with the top surface of the pier, and the end surface of the other end of the bent cap extends out of the bridge body;

the widening section, the widening section with the bent cap links to each other, the top surface of widening section has the recess, the cooperation of the portion of encorbelmenting is in the recess, the top surface of widening section with the top parallel and level of the portion of encorbelmenting.

2. The concrete bridge widening and reinforcing structure according to claim 1, wherein the bridge pier comprises a bridge pier shell and a bridge pier reinforcing layer, the bridge pier shell is sleeved on the outer peripheral side of the bridge pier body so as to define a first cavity with the outer peripheral wall of the bridge pier body, and the bridge pier reinforcing layer is arranged in the first cavity.

3. A concrete bridge widening and reinforcing construction according to claim 2, wherein a grout hole is provided on the pier housing, and the grout hole communicates with the first cavity.

4. A concrete bridge widening and reinforcing structure according to claim 3, wherein the pier further comprises a first connecting member and a second connecting member, the first connecting member is arranged on the pier body, the second connecting member is arranged on the pier housing, the first connecting member and the second connecting member are both embedded in the pier reinforcing layer, the first connecting member and the second connecting member are a plurality of members, the first connecting member is arranged on the outer peripheral wall of the pier body at intervals, and the second connecting member is arranged on the inner peripheral wall of the pier housing at intervals.

5. A concrete bridge widening and strengthening construction according to any one of claims 1 to 4, wherein the capping beams comprise capping beam shells, the capping beam shells being connected to the pier shells, the capping beam shells having second cavities.

6. A concrete bridge widening and strengthening construction according to claim 5, wherein the capping beam shell further comprises a partition provided in the second cavity, the partition being spaced from the pier in the direction of extension of the capping beam.

7. A concrete bridge widening and strengthening construction according to claim 6, wherein the widening section comprises a box girder and a deck plate, the box girder is arranged between the capping beam and the deck plate, a part of the deck plate is located below the overhanging portion and is connected with the overhanging portion, and the projection of the deck plate is larger than that of the box girder in the plane of the top surface of the deck plate.

8. A concrete bridge widening and reinforcing construction according to claim 7, wherein the widening section further comprises an end plate, the box girder has a box girder top plate, the end plate is connected with the box girder top plate, the end plate, the box girder top plate and the overhanging portion define the groove, and the groove is filled with concrete so as to form the bridge deck.

9. The concrete bridge widening and reinforcing structure according to claim 8, further comprising a third connecting member and a fourth connecting member, wherein the third connecting member is arranged on the overhanging portion, the fourth connecting member is arranged on the box girder top plate, the third connecting member and the fourth connecting member are both embedded in the bridge deck, the third connecting member and the fourth connecting member are both multiple, the third connecting member is arranged on the overhanging portion at intervals, and the fourth connecting member is arranged on the box girder top plate at intervals.

10. A construction method of a concrete bridge widening and reinforcing structure is characterized by comprising the following steps:

the outer peripheral side of the pier body is sleeved with a pier shell;

pouring concrete between the pier shell and the pier body so as to form a pier reinforcing layer;

arranging a bent cap shell on the top of the pier body and the pier reinforcing layer;

pouring concrete into the cover beam shell;

and arranging a widening section above the capping beam shell so as to widen the bridge deck.

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