CN114775461B - 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. The concrete bridge widening and reinforcing structure 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 the urban step, the number of motor vehicles is continuously increased, so that great pressure is caused to the traffic of urban roads, the traffic capacity of many early-built urban bridges is saturated, and the current traffic flow requirements can not be met. If the method of dismantling and reconstructing is adopted, the existing road can be occupied for a long time, great difficulty is brought to traffic fluffing, and the problems of limited construction sites, short construction period and the like are solved, so that the construction cost is extremely high. Thus, there is a need to upgrade and retrofit existing bridges.

In the related art, the widening and reinforcing method for the concrete bridge adopts the prefabricated components or cast-in-situ components of the same type to splice with the original structure to form a whole. The method is simple in design, high in construction cost, high in construction risk, long in construction period, and high in road traffic influence, and cannot be applied to complex overpasses, and the method is difficult to implement at busy traffic intersections.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

Therefore, the embodiment of the invention provides a widening and reinforcing structure of a concrete bridge, which has low cost, short construction period and small 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 widening and reinforcing structure of the concrete bridge comprises:

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 at the outer side of the bridge pier body;

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

The cover beam is positioned on the periphery 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 along the direction away from the bridge pier, the top surface of the cover beam is flush with the top surface of the bridge pier, and the end surface of the other end of the cover beam extends outwards out of the bridge body;

The widening section is connected with the bent cap, 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 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, the pier shell is provided with a grouting hole, and the grouting hole is communicated with the first cavity.

In some embodiments, the bridge pier further comprises a first connecting piece and a second connecting piece, the first connecting piece is arranged on the bridge pier body, the second connecting piece is arranged on the bridge pier shell, the first connecting piece and the second connecting piece are buried in the bridge pier reinforcing layer, the first connecting piece and the second connecting piece are multiple, the first connecting piece is arranged on the peripheral wall of the bridge pier body at intervals, and the second connecting piece is arranged on the inner peripheral wall of the bridge pier shell at intervals.

In some embodiments, the capping beam includes a capping beam housing coupled to the pier housing, the capping beam housing having a second cavity.

In some embodiments, the capping beam housing further includes a partition plate disposed in the second cavity, the partition plate and the bridge pier being spaced apart in an extending direction of the capping beam.

In some embodiments, the widening section includes a box girder and a bridge deck, the box girder is disposed between the cap girder and the bridge deck, a portion of the bridge deck is located below the overhanging portion and connected to the overhanging portion, and a projection of the bridge deck is greater than a projection of the box girder in a plane where a top surface of the bridge deck is located.

In some embodiments, the widening section further includes an end plate, the box girder having a box girder top plate, the end plate being connected to the box girder top plate, the end plate, the box girder top plate, and the overhanging portion defining the groove, the groove being filled with concrete so as to form the bridge deck.

In some embodiments, the concrete bridge widening and reinforcing structure further includes a third connecting piece and a fourth connecting piece, the third connecting piece is disposed on the overhanging portion, the fourth connecting piece is disposed on the girder top plate, the third connecting piece and the fourth connecting piece are buried in the bridge deck, the third connecting piece and the fourth connecting piece are multiple, the third connecting piece is disposed at intervals on the overhanging portion, and the fourth connecting piece is disposed at intervals on the girder top plate.

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

A pier shell is sleeved on the periphery side of the pier body;

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

a capping beam shell is arranged at the tops of the pier body and the pier reinforcing layer;

pouring concrete into the bent cap shell;

And a widening section is arranged above the capping beam shell so as to widen the bridge 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 cap 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 bridge pier and a cap 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 concrete bridge widened and reinforced structural capping beam according to an embodiment of the present invention.

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

Reference numerals:

A concrete bridge widening and reinforcing structure 100;

a pier body 101; a bridge body 102; a cantilever portion 1020; a primary support 103;

Pier 1; a pier housing 11; a first top plate 111; a side plate 112; a first bottom plate 113; a pier reinforcing layer 12; a first cavity 13; a first connector 14; a second connector 15;

a capping beam 2; a bent cap housing 23; a second cavity 230; a second top plate 231; a second bottom plate 232; a first web 233; a second web 234; a capping beam end plate 235; a first separator 236; a first stiffener 237; a fifth link 238; a first capping beam 21; a second capping beam 22;

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

And 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 by referring to the drawings are illustrative and intended to explain the present invention and should not 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 cap beam 2 and a widening section 3,

The bridge pier body 101 is arranged at the bottom of the bridge body 102, the bridge body 102 is provided with an overhanging portion 1020, and the overhanging portion 1020 is positioned at the outer side of the bridge pier body 101.

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

The widening section 3 is connected with the capping beam 2, the top surface of the widening section 3 is provided with a groove 30, the overhanging portion 1020 is matched in the groove 30, and the top surface of the widening section 3 is flush with the top of the overhanging portion 1020.

In order to make the technical solution of the present application easier to understand, the following will take the example that the height direction of the pier body 101 coincides with the up-down direction, and take the example that the extending direction of the capping 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 body 101 and a bridge body 102, an original support 103 is disposed between the bridge body 101 and the bridge body 102, overhanging portions 1020 are disposed on the left side and the right side of the bridge body 102, the overhanging portions 1020 extend to the outer side of the bridge body 102, that is, overhanging portions 1020 on the left side of the bridge body 102 extend to the left side, and overhanging portions 1020 on the right side of the bridge body 102 extend to the right side. The pier 1 surrounds the outer peripheral side of the pier body 101, and the pier 1 is consistent with the pier body 101 in height and is connected with the pier body 101 so as to strengthen the pier body 101.

The bent cap 2 is established at the top of pier 1, and extend along controlling the 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 the section of widening 3 on the free end of bent cap 2, the lower extreme of the section of widening 3 links to each other with the free end of bent cap 2, the top surface of the section of widening 3 and the portion of encorbelmenting 1020 parallel and level, the diapire of the partial diapire of portion of encorbelmenting 1020 or the diapire of whole portion of encorbelmenting 1020 cooperate in recess 30, and link to each other with the section of widening 3 is fixed, thereby make the section of widening 3 and the portion of encorbelmenting 1020 can be firm combine together, and then widen the bridge floor of former bridge.

Optionally, the capping beam 2 includes a first capping beam 21 and a second capping beam 22, the widening section 3 includes a first widening section 31 and a second widening section 32, the first capping beam 21 is disposed on the left side of the bridge pier 1, the second capping beam 22 is disposed on the right side of the bridge pier 1, the first widening section 31 is connected with the first capping beam 21 and is located on the left side of the bridge pier body 101, so as to widen the left side of the bridge deck, and the second widening section 32 is connected with the second capping beam 22 and is located on the right side of the bridge pier body 101, so as to widen the right side of the bridge deck.

In the related art, the widening and reinforcing method for the concrete bridge adopts the prefabricated components or cast-in-situ components of the same type to splice with the original structure to form a whole. The method is simple in design, high in construction cost, high in construction risk, long in construction period, and high in road traffic influence, and cannot be applied to complex overpasses, and the method is difficult to implement at busy traffic intersections.

In the construction of a concrete bridge widening and reinforcing structure 100 according to an embodiment of the present invention, concrete is poured first 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 cap beam 2, and finally concrete is poured above the cap beam 2 to form a widened section 3, thereby forming a widened bridge deck.

According to the concrete bridge widening and reinforcing structure 100, the bridge pier 1, the capping beam 2 and the widening section 3 are added outside an original bridge, so that the original bridge is widened and reinforced, and the original concrete bridge is updated and modified. Compared with the related art, the concrete bridge widening and reinforcing structure 100 is low in construction cost, short in construction period, free of occupation of existing roads and large-scale machines and equipment, small in influence on the passing of the existing bridge and peripheral roads, high in construction safety, high in bearing capacity of the modified structure, high in rigidity and strong in anti-overturning capacity.

Therefore, the concrete bridge widening and reinforcing structure 100 of 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 includes a pier shell 11 and a pier reinforcing layer 12, where 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 disposed in the first cavity 13.

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

It will be appreciated 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 housing 11 may be a cylindrical or rectangular cube or the like.

In some embodiments, the pier shell 11 is provided with a grouting hole, and the grouting hole is communicated with the first cavity 13. Thereby, concrete is poured into the first cavity 13 through the grouting holes, and after the concrete is coagulated, a pier reinforcing layer 12 is formed, so that the pier body 101 is reinforced. The pier housing 11 is provided outside the pier reinforcing layer 12, so that not only the structural strength of the pier reinforcing layer 12 can be improved, but also the pier reinforcing layer 12 can be protected, and the pier body 101 can be further protected.

Alternatively, a plurality of grouting holes are provided, and the grouting holes are located at the top of the pier housing 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 along the up-down direction and is spaced 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 shells 11 are plural, and the plural pier shells 11 are looped around the outer Zhou Cewei of the pier body 101 so as to define the first cavity 13 with the outer peripheral wall of the pier body 101.

For example, the bridge pier housing 11 is provided with two side plates 112 having a semicircular cross section, and grouting holes are provided in the first top plate 111. During construction, a group of side plates 112, a first top plate 111 and a first bottom plate 113 are welded together, another group of side plates 112, a first top plate 111 and a first bottom plate 113 are welded together, the two groups of pier shells 11 are arranged on the outer periphery side of the pier body 101, the joints of the two groups of pier shells 11 are welded to form a first cavity 13, and finally concrete is poured into the first cavity 13 from a grouting hole to form a pier reinforcing layer 12.

Alternatively, the first deck 111 is fixed to the top end of the pier 1 by bonding. For example, epoxy mortar is applied to the top end of the bridge pier 1, and the first roof panel 111 is bonded to the top surface of the bridge pier 1 by the adhesive force of the epoxy mortar.

Alternatively, the pier housing 11 is made of steel plate.

In other embodiments, roughening treatment is required on the peripheral wall of the pier body 101 before construction, and the roughening shape is saw-tooth, 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 bridge pier 1 further includes a first connecting member 14 and a second connecting member 15, the first connecting member 14 is disposed on the bridge pier body 101, the second connecting member 15 is disposed on the bridge pier housing 11, and the first connecting member 14 and the second connecting member 15 are buried in the bridge pier reinforcing layer 12, the first connecting member 14 and the second connecting member 15 are plural, the plural first connecting members 14 are disposed at intervals on the outer peripheral wall of the bridge pier body 101, and the plural second connecting members 15 are disposed at intervals on the inner peripheral wall of the bridge pier housing 11.

For example, as shown in fig. 3, the first connection members 14 are provided on the outer peripheral wall of the pier body 101, the second connection members 15 are provided on the inner peripheral wall of the pier housing 11, the plurality of first connection members 14 are arranged at intervals on the outer peripheral wall of the pier body 101, the plurality of second connection members 15 are arranged at intervals on the inner peripheral wall of the pier housing 11, the first connection members 14 and the second connection members 15 are both located in the first cavity 13, and concrete poured into the first cavity 13 forms the pier reinforcing layer 12. After the pier reinforcing layer 12 is formed, one end of the first connecting member 14 is in the pier reinforcing layer 12, the other end of the first connecting member 14 is connected to the pier body 101, one end of the second connecting member 15 is in the pier reinforcing layer 12, and the other end of the second connecting member 15 is connected to the pier housing 11. Thereby, the connection between the pier reinforcing layer 12 and the pier body 101 is facilitated to be reinforced by the first connecting member 14; the second connecting piece 15 is used for conveniently reinforcing the connection between the pier reinforcing layer 12 and the pier shell 11; the first connecting member 14 and the second connecting member 15 are used to facilitate 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 piece 14 is a bar planting, when the bar planting is installed on the pier body 101, a hole is drilled on the peripheral wall of the pier body 101, then the first connecting piece 14 is inserted, and finally a modified epoxy structural adhesive is poured into the drilled hole, so that the first connecting piece 14 can be anchored in the pier body 101.

Alternatively, the second connector 15 is a shear connector, for example, the second connector 15 is a peg or a T-plate.

In some embodiments, the capping beam 2 includes a capping beam housing 23, the capping beam housing 23 being connected to the pier housing 11, the capping beam housing 23 having a second cavity 230.

For example, as shown in fig. 4 and 5, one end of the capping beam housing 23 is fixedly connected with the pier housing 11, the first capping beam 21 includes a first capping beam housing, the second capping beam 22 includes a second capping beam housing, the right end of the first capping beam housing is fixedly connected with the left side wall of the pier housing 11, and the left end of the second capping beam housing is fixedly connected with the right side wall of the pier housing 11. A cavity is provided in the capping beam housing 23, and concrete is poured into the cavity to form the capping beam 2.

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

For convenience of description, the structure of the capping beam case 23 will be described below with a direction perpendicular to the extending direction of the capping beam case 23 as a front-rear direction, wherein the front-rear direction is as shown in fig. 6.

In other embodiments, as shown in fig. 5 and 6, the capping beam housing 23 includes a second top plate 231, a second bottom plate 232, a first web 233, a second web 234, and a capping beam end plate 235, the second top plate 231 and the second bottom plate 232 being spaced apart and disposed opposite in the up-down direction, the first web 233 and the second web 234 being located between the second top plate 231 and the second bottom plate 232, the first web 233 and the second web 234 being spaced apart and disposed opposite in the front-back direction, the capping beam end plate 235 being disposed on a side of the capping beam housing 23 remote from the pier 1, the second top plate 231, the second bottom plate 232, the first web 233, the second web 234, the capping beam end plate 235, and the pier housing 11 together defining the second cavity 230.

Optionally, the second bottom plate 232 is provided with a fifth connecting member 238 extending in the up-down direction, the capping beam 2 is formed after concrete is poured in the second cavity 230, the upper end of the fifth connecting member 238 is located in the capping beam 2, and the lower end of the fifth connecting member 238 is connected to the capping beam housing 23, so that the connection of the capping beam 2 and the capping beam housing 23 can be reinforced by the fifth connecting member 238, thereby improving the structural strength of the capping beam 2. The fifth connection 238 is a peg or T-plate.

Optionally, the first web 233 and the second web 234 are provided with first stiffening ribs 237, the first stiffening ribs 237 are made of strip steel plates, and the first stiffening ribs 237 can improve the structural strength of the first web 233 and the second web 234, thereby improving the structural strength of the capping beam 2.

In some embodiments, the capping beam housing 23 further includes a first partition 236, the first partition 236 being disposed in the second cavity 230, the first partition 236 being spaced apart from the bridge pier 1 in the extending direction of the capping beam 2.

For example, as shown in fig. 5 and 6, a first partition plate 236 is provided in the second cavity 230, the first partition plate 236 is connected to the cap beam case 23, the bridge pier case 11, the first partition plate 236, and the cap beam end plate 235 are arranged at intervals in the left-right direction, and the plane on which the surface of the first partition plate 236 is located is perpendicular to the extending direction of the cap beam 2, that is, the surface of the first partition plate 236 is perpendicular to the left-right direction. Thereby, the structure of the capping beam case 23 may be reinforced by the first partition 236, thereby improving the structural strength of the capping beam case 23.

Alternatively, the cross section of the capping beam housing 23 is a box-shaped cross 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 cap girder 2 and the bridge deck, a part 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 a plane where the top surface of the bridge deck is located.

For example, as shown in fig. 7, the bottom of the box girder 33 is connected to the cap 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 with the overhanging portion 1020, the bottom of the bridge deck is located 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 of the bridge deck and the overhanging portion 1020 is large, the structural strength is high, and the bridge deck is convenient to widen the original bridge deck.

Further, one end of the bridge deck plate adjacent to the bridge body 102 is connected with the bridge body 102 below the overhanging portion 1020, and the bridge body 102 is provided with the embedded ribs, so that the structural strength of the bridge deck plate and the bridge body 102 is enhanced.

Optionally, the bottom of the box girder 33 is provided with a second stiffener 333, and the second stiffener 333 may improve the structural strength of the box girder 33.

In some embodiments, the widened 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 recess 30, and the recess 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, and the groove 30 is filled with concrete 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 box girder 33 has a second partition 332 inside, the second partition 332 may strengthen the structural strength of the box girder 33, and a manhole 3320 is provided on the second partition 332 to facilitate the constructor to enter the box girder 33.

In other embodiments, roughening of the bottom wall of the overhanging portion 1020 is required before adding the widening section 3, so that the bridge deck and the overhanging portion 1020 can be firmly bonded together, thereby improving the structural strength of a concrete bridge widening and reinforcing structure 100.

In some embodiments, the 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 girder ceiling 331, the third connecting member 35 and the fourth connecting member 36 are buried in the bridge deck, the third connecting member 35 and the fourth connecting member 36 are plural, the plural third connecting members 35 are disposed at intervals on the overhanging portion 1020, and the plural fourth connecting members 36 are disposed at intervals on the girder ceiling 331.

For example, as shown in fig. 7, a plurality of third connection members 35 are arranged at intervals on the bottom wall of the cantilever portion 1020, a plurality of fourth connection members 36 are arranged at intervals on the box girder top plate 331, the third connection members 35 and the fourth connection members 36 are each located in the groove 30, and concrete is poured into the groove 30 to form the bridge deck. After the bridge deck is formed, one end of the third link 35 is in the bridge deck, the other end of the third link 35 is connected to the overhanging portion 1020, one end of the fourth link 36 is in the bridge deck, and the other end of the fourth link 36 is connected to the box girder top plate 331. Thereby, the connection between the bridge deck and the overhanging portion 1020 is facilitated to be reinforced by the third connecting member 35; the fourth connecting piece 36 is utilized to facilitate the connection between the bridge deck and the box girder top plate 331; the third connecting member 35 and the fourth connecting member 36 are used to facilitate the connection between the reinforcing box girder top plate 331, the bridge deck and the overhanging portion 1020, thereby reinforcing the overhanging portion 1020 and widening the bridge deck.

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

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

In some embodiments, a concrete bridge widening and reinforcing construction 100 further includes a support 4, the support 4 being disposed between the box girder 33 and the cap girder 2.

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

Alternatively, the support 4 is a basin rubber support 4.

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

A pier housing 11 is sleeved on the outer periphery side of the pier body 102;

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

a capping beam shell 23 is arranged 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 housing 23 in order to widen the deck.

The construction method for widening and reinforcing the concrete bridge 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 should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

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

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (7)

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 at the outer side of the bridge pier body;

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

The cover beam is positioned on the periphery 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 along the direction away from the bridge pier, the top surface of the cover beam is flush with the top surface of the bridge pier, and the end surface of the other end of the cover beam extends outwards out of the bridge body;

The widening section is connected with the bent cap, 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 level with the top of the overhanging part;

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;

The bent cap comprises a bent cap shell, the bent cap shell is connected with the pier shell, and the bent cap shell is provided with a second cavity;

The widening section comprises a box girder and a bridge deck plate, wherein the box girder is arranged between the cover girder and the bridge deck plate, a part of the bridge deck plate is positioned below the overhanging part and connected with the overhanging part, and the projection of the bridge deck plate is larger than that of the box girder in the plane where the top surface of the bridge deck plate is positioned.

2. The concrete bridge widening and reinforcing structure as set forth in claim 1, wherein said pier shell is provided with a grouting hole, said grouting hole being in communication with said first cavity.

3. The concrete bridge widening and reinforcing structure according to claim 2, wherein said bridge pier further comprises a first connecting member and a second connecting member, said first connecting member is provided on said bridge pier body, said second connecting member is provided on said bridge pier housing, said first connecting member and said second connecting member are buried in said bridge pier reinforcing layer, said first connecting member and said second connecting member are plural, said first connecting member is disposed on an outer peripheral wall of said bridge pier body at intervals, and said second connecting member is disposed on an inner peripheral wall of said bridge pier housing at intervals.

4. The concrete bridge widening and reinforcing structure according to claim 1, wherein said cap beam housing further comprises a partition plate provided in said second cavity, said partition plate being spaced apart from said bridge pier in an extending direction of said cap beam.

5. A concrete bridge widening and reinforcing construction according to claim 1, wherein the widening section further comprises an end plate, the box girder having a box girder top plate, the end plate being connected to the box girder top plate, the end plate, the box girder top plate and the overhanging portion defining the recess, the recess being filled with concrete to form the bridge deck.

6. The concrete bridge widening and reinforcing structure according to claim 5, further comprising a third connecting member and a fourth connecting member, wherein the third connecting member is provided on the overhanging portion, the fourth connecting member is provided on the girder top plate, and the third connecting member and the fourth connecting member are buried in the bridge deck, the third connecting member and the fourth connecting member are plural, the third connecting member is arranged at intervals on the overhanging portion, and the fourth connecting member is arranged at intervals on the girder top plate.

7. A construction method based on the widening and reinforcing construction of a concrete bridge as claimed in any one of claims 1-6, characterized by the steps of:

A pier shell is sleeved on the periphery side of the pier body;

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

a capping beam shell is arranged at the tops of the pier body and the pier reinforcing layer;

pouring concrete into the bent cap shell;

a widening section is arranged above the bent cap shell so as to widen the bridge deck;

The bent cap shell is connected with the pier shell and is provided with a second cavity;

The widening section comprises a box girder and a bridge deck plate, wherein the box girder is arranged between the cover girder and the bridge deck plate, a part of the bridge deck plate is located below the overhanging part and connected with the overhanging part, and the projection of the bridge deck plate is larger than that of the box girder in the plane where the top surface of the bridge deck plate is located.