阅读说明：本技术 一种道路涵洞加固系统及其施工方法 (Road culvert reinforcing system and construction method thereof ) 是由 徐善华 刘博� 付森 尹露露 于 2021-09-29 设计创作，主要内容包括：本发明公开了一种道路涵洞加固系统及其施工方法,包括两个加固单元；两个加固单元的结构相同,且对称设置在既有涵洞的前后两端；加固单元包括条形基础、若干结构柱及纵向结构梁；条形基础平行设置在既有涵洞的基底端部,若干结构柱竖向平行设置在条形基础的上方,结构柱与既有涵洞的竖向墙体端部紧密贴合；纵向结构梁水平设置在相邻两个结构柱之间,纵向结构梁的顶部设置有第一挑板,第一挑板沿既有涵洞的顶板的宽度方向通长设置；纵向结构梁的底部设置有第二挑板,第二挑板顶面与既有涵洞的顶板的底面紧密贴合；本发明充分利用既有涵洞结构的承载能力基础上,建立了新的荷载传递途径,传力路径明确,有效提高了既有涵洞结构的承载能力。(The invention discloses a road culvert reinforcement system and a construction method thereof, wherein the road culvert reinforcement system comprises two reinforcement units; the two reinforcing units have the same structure and are symmetrically arranged at the front end and the rear end of the existing culvert; the reinforcing unit comprises a strip foundation, a plurality of structural columns and a longitudinal structural beam; the bar-shaped foundation is arranged at the end part of the base of the existing culvert in parallel, the plurality of structural columns are vertically arranged above the bar-shaped foundation in parallel, and the structural columns are tightly attached to the end part of the vertical wall body of the existing culvert; the longitudinal structural beam is horizontally arranged between two adjacent structural columns, a first cantilever plate is arranged at the top of the longitudinal structural beam, and the first cantilever plate is arranged along the full length of the width direction of the top plate of the existing culvert; the bottom of the longitudinal structural beam is provided with a second cantilever plate, and the top surface of the second cantilever plate is tightly attached to the bottom surface of the top plate of the existing culvert; the invention establishes a new load transmission path on the basis of fully utilizing the bearing capacity of the existing culvert structure, has clear force transmission path and effectively improves the bearing capacity of the existing culvert structure.)

1. A road culvert reinforcement system is characterized by comprising two reinforcement units; the two reinforcing units have the same structure and are symmetrically arranged at the front end and the rear end of the existing culvert (1); the reinforcing unit comprises a strip foundation (2), a plurality of structural columns (3) and a longitudinal structural beam (4); the bar-shaped foundation (2) is arranged at the end part of the base of the existing culvert (1) in parallel, the plurality of structural columns (3) are vertically arranged above the bar-shaped foundation (2) in parallel, and the structural columns (3) are arranged in one-to-one correspondence with the vertical wall of the existing culvert (1) and are tightly attached to the end part of the vertical wall of the existing culvert (1);

the longitudinal structural beam (4) is horizontally arranged between two adjacent structural columns (3), the side wall of the longitudinal structural beam (4) is attached to the end part of the top plate of the existing culvert (1), and the top surface of the longitudinal structural beam (4) is flush with the upper surface of the top plate of the existing culvert (1); the top of the longitudinal structural beam (4) is provided with a first cantilever plate, the first cantilever plate is positioned on one side of the top plate far away from the existing culvert (1), and the first cantilever plate is arranged along the full length of the top plate of the existing culvert (1) in the width direction;

a second cantilever plate is arranged at the bottom of the longitudinal structural beam (4), and the second cantilever plate is arranged at one side close to the top plate of the existing culvert (1); one side of the second cantilever plate is connected with the longitudinal structural beam (4), the other side of the second cantilever plate extends towards the center of the top plate of the existing culvert (1), and the top surface of the second cantilever plate is tightly attached to the bottom surface of the top plate of the existing culvert (1).

2. A road culvert reinforcement system according to claim 1, characterized in that it further comprises a number of transverse structural beams (5); the transverse structural beams (5) are horizontally arranged between the two reinforcing units and are uniformly arranged at intervals along the width direction of a top plate of the existing culvert (1); one end of the transverse structural beam (5) is vertically fixed with the longitudinal structural beam (4) in one of the reinforcing units, and the other end of the transverse structural beam (5) is vertically fixed with the longitudinal structure (4) in the other reinforcing unit; the top surface of the transverse structural beam (5) is in close contact with the bottom surface of the top plate of the existing culvert (1).

3. A road culvert reinforcement system according to claim 2, characterized in that the longitudinal structural beams (4) and the transverse structural beams (5) are concrete structural beams.

4. A road culvert reinforcement system according to claim 2, characterized in that it further comprises a number of steel beams (6); the section steel beam (6) horizontally penetrates through the transverse structural beam (5), one end of the section steel beam (6) is fixedly inserted into the longitudinal structural beam (4) in one of the reinforcing units, and the other end of the section steel beam (6) is fixedly inserted into the longitudinal structural beam (4) in the other reinforcing unit.

5. A road culvert reinforcement system according to claim 4, characterized in that, still include a plurality of shaped steel post (7), shaped steel post (7) vertically evenly set up on the longitudinal axis of horizontal structure roof beam (4), the lower extreme of shaped steel post (7) and shaped steel roof beam (6) the beam-end top surface fixed.

6. A road culvert reinforcement system according to claim 5, characterized in that a stiffening rib plate (8) is arranged at the connecting node of the section steel column (7) and the section steel beam (6).

7. A road culvert reinforcement system according to claim 5, characterized in that the section steel beams (6) and the section steel columns (7) are both H-shaped steel; the web of the section steel beam (6) is vertically arranged, and the web of the section steel column (7) and the web of the section steel beam (6) are located in the same vertical plane; the lower end of the section steel column (7) is welded and fixed with the upper flange of the beam end of the section steel beam (6).

8. A road culvert reinforcement system according to claim 1, characterized in that the design elevation of the strip-shaped foundation (2) does not exceed the base elevation of the existing culvert (1).

9. The construction method of a road culvert reinforcement system as claimed in claim 1, characterized by comprising the steps of:

according to the design size of the strip foundation (2), excavating the end part of the foundation of the existing culvert (1) to obtain a foundation construction space;

constructing in the space of a foundation construction area to obtain a strip foundation (2);

a structural column (3) is constructed above the strip-shaped foundation (2) corresponding to the vertical wall of the existing culvert (1);

constructing a longitudinal structural beam (4) between two adjacent structural columns (3) along the width direction of the existing culvert (1), namely completing the construction of one reinforcing unit;

and repeating the operation till the construction of another reinforcing unit is completed.

10. The construction method of the road culvert reinforcement system according to claim 9, wherein in the process of excavating the base end of the existing culvert (1) to obtain the base construction space, the base construction space located within the range of 200-300mm above the designed elevation of the base of the culvert (1) is formed by adopting a manual excavation method.

Technical Field

The invention belongs to the technical field of building structure reinforcement, and particularly relates to a road culvert reinforcing system and a construction method thereof.

Background

Culverts are tunnels provided in the foundations of railways and highways, and are usually used as passages for people, vehicles, water flow and the like on both sides of the roads; at present, culvert structures are widely applied to the fields of railway buildings, highway buildings, bridge buildings, agricultural water conservancy and the like. Because a great amount of culvert structures are in the field and are subjected to severe natural environment for a long time, the culvert structures have the defects of concrete cracking, surface stripping and exposed ribs, steel bar corrosion and the like, and the reliability of the culvert structures is reduced to a certain extent; in recent years, with rapid development of economy and society, the increase of vehicle operation time and the improvement of vehicle load capacity, transportation capacity and speed cause the increase of deformation of part of existing culvert structures, the reduction of bearing capacity and the deterioration of stability performance, and the serious threat to the safety of the culvert structures is formed; therefore, it is highly desirable to perform necessary reinforcement treatment on the existing culvert structure having the above problems to ensure safe operation of road transportation and production.

At present, a steel sticking method, a section increasing method or a bridge deck reinforcing layer method are mainly used for a commonly used reinforcing technology of an existing culvert structure, the method improves the overall bearing performance of the culvert structure to a certain extent by reinforcing local components of the existing culvert structure, but the method is mostly applied to the defect reinforcing of the culvert structure, cannot be applied to the condition that the road transportation load is increased more, and has certain limitation in the aspect of engineering practical application.

The steel bonding method is characterized in that a steel plate is bonded to a part needing to be reinforced by adopting an adhesive, so that the steel plate becomes a component of a culvert structural member, the whole working performance depends on the performance of the adhesive, the adhesive performance is sensitive to temperature change, the adhesive is aged after being used for a long time, the long-term property of the reinforcing effect of the method needs to be studied, and the whole bearing capacity is improved to a limited extent after the reinforcing; the section increasing method is characterized in that the overall bearing capacity of the culvert structure is improved by increasing the section size of the top plate or the side wall of the culvert structure or increasing the number of steel bars of the culvert structure component, a large amount of bar planting operation is required, the original culvert structure component is damaged to a certain extent, the problem of high construction difficulty exists, the size of the opening of the culvert is reduced, and the normal passing of vehicles in the culvert is influenced; the bridge deck reinforcing layer method is that a reinforced concrete layer is paved on the top plate of the existing culvert structure, so that the reinforced concrete layer and the original culvert structure bear force jointly, although the rigidity and the bearing capacity of the structure are improved by increasing the height of the top plate of the culvert structure, the dead weight of the original structure is increased, the load of the foundation is increased, the road surface layer of the original culvert needs to be broken in the construction process, and the normal traffic of vehicles and personnel on the top surface of the culvert cannot be met.

In summary, in order to solve some or all of the above problems in the prior art, a reinforcement method with definite force transmission, convenient construction, wide applicability, economy and high efficiency is urgently needed to be provided, so as to effectively solve the above defects in the prior reinforcement method.

Disclosure of Invention

Aiming at the technical problems in the prior art, the invention provides a road culvert reinforcing system and a construction method thereof, and aims to solve the technical problems that the existing culvert structure reinforcing method cannot be suitable for the condition that the road transportation load is increased more and has large limitation.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a road culvert reinforcement system, which comprises two reinforcement units; the two reinforcing units have the same structure and are symmetrically arranged at the front end and the rear end of the existing culvert; the reinforcing unit comprises a strip foundation, a plurality of structural columns and a longitudinal structural beam; the bar-shaped foundation is arranged at the end part of the base of the existing culvert in parallel, the plurality of structural columns are vertically arranged above the bar-shaped foundation in parallel, and the structural columns are arranged corresponding to the vertical wall bodies of the existing culvert one by one and are tightly attached to the end part of the vertical wall body of the existing culvert;

the longitudinal structural beams are horizontally arranged between two adjacent structural columns, the side walls of the longitudinal structural beams are attached to the end parts of the top plates of the existing culverts, and the top surfaces of the longitudinal structural beams are flush with the upper surfaces of the top plates of the existing culverts; the top of the longitudinal structural beam is provided with a first cantilever plate, the first cantilever plate is positioned on one side of the top plate far away from the existing culvert and is arranged along the width direction of the top plate of the existing culvert;

the bottom of the longitudinal structural beam is provided with a second cantilever plate which is arranged at one side close to the top plate of the existing culvert; one side of the second cantilever plate is connected with the longitudinal structural beam, the other side of the second cantilever plate extends towards the center of the top plate of the existing culvert, and the top surface of the second cantilever plate is tightly attached to the bottom surface of the top plate of the existing culvert.

Furthermore, the device also comprises a plurality of transverse structural beams; the transverse structural beams are horizontally arranged between the two reinforcing units and are uniformly arranged at intervals along the width direction of a top plate of the existing culvert; one end of the transverse structural beam is vertically fixed with the longitudinal structural beam in one of the reinforcing units, and the other end of the transverse structural beam is vertically fixed with the longitudinal structure in the other reinforcing unit; the top surface of the transverse structural beam is in close contact with the bottom surface of the top plate of the existing culvert.

Furthermore, the longitudinal structural beam and the transverse structural beam are both concrete structural beams.

Furthermore, the steel plate also comprises a plurality of section steel beams; the section steel beam horizontally penetrates through the transverse structural beam, one end of the section steel beam is fixedly inserted into the longitudinal structural beam in one of the reinforcing units, and the other end of the section steel beam is fixedly inserted into the longitudinal structural beam in the other reinforcing unit.

Further, still include a plurality of shaped steel post, the vertical even setting of shaped steel post is on the longitudinal axis of transverse structure roof beam, and the lower extreme of shaped steel post is fixed with the beam-ends top surface of shaped steel roof beam.

Furthermore, a stiffening rib plate is arranged at the connecting joint of the section steel column and the section steel beam.

Furthermore, H-shaped steel is adopted for both the section steel beam and the section steel column; the web plate of the section steel beam is vertically arranged, and the web plate of the section steel column and the web plate of the section steel beam are positioned in the same vertical plane; the lower end of the section steel column is welded and fixed with the upper flange of the beam end of the section steel beam.

Furthermore, the designed elevation of the strip foundation does not exceed the elevation of the base of the existing culvert.

The invention also provides a construction method of the road culvert reinforcing system, which comprises the following steps:

excavating the end part of the base of the existing culvert to obtain a foundation construction space according to the design size of the strip foundation;

constructing in the space of the foundation construction area to obtain a strip foundation;

constructing a structural column above the strip foundation corresponding to the vertical wall of the existing culvert;

constructing a longitudinal structural beam between two adjacent structural columns along the width direction of the existing culvert, namely completing the construction of one reinforcing unit;

and repeating the operation till the construction of another reinforcing unit is completed.

Further, in the process of excavating the end part of the base of the existing culvert to obtain the foundation construction space, the foundation construction space which is located in the range of 200-300mm above the designed elevation of the base of the existing culvert is formed by adopting a manual excavation mode.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a road culvert reinforcing system and a construction method thereof.A strip-shaped foundation is arranged on two sides of a base of an existing culvert, structural columns are arranged at vertical wall bodies of the culvert above the strip-shaped foundation symmetrically, and longitudinal structural beams are arranged between the structural columns to form a main bearing frame system of the whole reinforcing system; the structural columns are used as main vertical bearing members, can bear the load on the top plate of the reinforced existing culvert and directly transmit the load to the foundation, and the first cantilever plate is arranged on one side of the top of the longitudinal structural beam, so that conditions are provided for widening the road surface on the top plate of the existing culvert, and the structural columns are suitable for the condition that the width of the existing road surface is insufficient; the top surface of the second strip plate is tightly attached to the bottom surface of the top plate of the existing culvert by arranging the second strip plate on one side of the bottom of the longitudinal structural beam, so that supporting conditions are provided for two sides of the top plate of the existing culvert, the bidirectional plate structure for converting the unidirectional support into the bidirectional support is realized, and the bearing capacity of the top plate of the existing culvert is improved on the premise of not reinforcing the top plate of the existing culvert; when the top plate of the existing culvert has load, the top plate has vertical deflection deformation, the second cantilever plate in the reinforcing system can limit the deformation of the top plate to further occur, and the load on the top plate of the existing culvert structure can be effectively transmitted to a main bearing frame system of the reinforcing system through deformation coordination regulation, so that the synergistic stress of the existing culvert structure and the reinforcing system is realized, the culvert reinforcing method is suitable for reinforcing the existing culvert under the condition that the road transportation load is increased more, and the limitation is small.

Furthermore, a plurality of transverse structural beams are arranged between the two reinforcing units, and the transverse structural beams are utilized to divide the top plate of the existing culvert into a plurality of stressed plates with smaller areas, so that the load capacity of the top plate of the existing culvert is effectively improved; the top surface of the transverse structural beam is in close contact with the bottom surface of the top plate of the existing culvert, so that the vertical deflection deformation of the top plate can be further limited, and the effective transmission of vertical force between the top plate of the existing culvert and the transverse structural beam is ensured.

Furthermore, the section steel beams are horizontally arranged in the transverse structural beam in a penetrating mode, so that the bending resistance and the shearing resistance bearing capacity of the transverse structural beam are effectively improved; the two ends of the section steel beam extend into and are anchored in the longitudinal structural beam, and the integrity between the longitudinal structural beam and the transverse structural beam in the reinforcing system is enhanced.

Furthermore, the section steel columns are arranged in the longitudinal structural beams, and the beam ends of the section steel columns and the section steel beams are fixedly connected, so that the anchoring performance between the section steel beams and the longitudinal structural beams is effectively enhanced, and the reliability of transferring the load on the top plate of the existing culvert to the main bearing frame system of the reinforcing system is ensured.

Furthermore, through set up the stiffening rib board at the connected node of shaped steel post and shaped steel roof beam, effectively improved shaped steel post and shaped steel roof beam connected node's overall stability.

Furthermore, the designed elevation of the base of the strip foundation is not more than that of the existing culvert, so that the disturbance of the existing culvert on-site foundation soil layer in the excavation engineering is prevented, and the stability of the existing culvert foundation and the foundation soil layer is ensured.

Furthermore, a foundation construction space which is located within the range of 200-300mm above the designed elevation of the foundation with the culvert is formed by adopting a manual excavation mode, so that the original soil layer of the foundation is prevented from being damaged by mechanical overexcavation.

The reinforcing system for the road culvert and the construction method thereof have the advantages that the reinforcing system is simple in structure, clear in force transmission path, low in input cost and good in reliability, and can achieve the purposes of convenient, economic and effective reinforcement; the reinforcing effect is good, the practical value is high, the obvious advantages are achieved in the aspects of economy and practicability, the normal passing of the culvert up and down is not influenced, and the use space is not occupied; the culvert structure has the advantages that damage to the existing culvert is avoided, a new load transfer way is established by utilizing an additional reinforcing system on the basis of fully utilizing the bearing capacity of the existing culvert structure, the bearing capacity of the existing culvert structure is effectively improved, operability and popularization are realized, and remarkable economic and social benefits can be brought.

Drawings

FIG. 1 is an axial schematic view of an existing dual-bore culvert construction in an embodiment;

FIG. 2 is a schematic diagram of an axial structure of the reinforcement system according to an embodiment;

FIG. 3 is an elevation view of a reinforcement system according to an embodiment;

FIG. 4 is a cross-sectional view of a reinforcement system according to an embodiment;

FIG. 5 is an axial view of the arrangement of the strip bases in the embodiment;

FIG. 6 is a cross-sectional view showing the arrangement of the strip foundations in the embodiment;

FIG. 7 is an axial schematic view of the arrangement of structural columns in the embodiment;

FIG. 8 is a cross-sectional view showing the arrangement of structural columns in the embodiment;

FIG. 9 is an axial view of the arrangement of the longitudinal structural beams in the embodiment;

FIG. 10 is a cross-sectional view showing the arrangement of longitudinal structural beams in the embodiment;

FIG. 11 is a cross-sectional view of an arrangement of transverse structural beams in an embodiment;

FIG. 12 is a cross-sectional view showing the arrangement of the section steel beams in the embodiment;

FIG. 13 is a schematic view of the connection structure of the section steel beam and the section steel column in the embodiment.

Wherein, 1 existing culvert, 2 bar foundations, 3 structural columns, 4 longitudinal structure roof beams, 5 transverse structure roof beams, 6 shaped steel roof beams, 7 shaped steel post, 8 stiffening rib boards.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a road culvert reinforcing system which comprises two reinforcing units, a plurality of transverse structural beams 5, a plurality of section steel beams 6, a plurality of section steel columns 7 and a plurality of stiffening rib plates 8.

The two reinforcing units have the same structure and are symmetrically arranged at the front end and the rear end of the existing culvert 1; the reinforcing unit comprises a strip foundation 2, three structural columns 3 and two longitudinal structural beams 4; the strip-shaped foundations 2 are arranged at the end part of the base of the existing culvert 1 in parallel and are horizontally arranged along the width direction of the base of the existing culvert 1; one side of the strip-shaped foundation 2 is connected with the foundation of the existing culvert 1, and the other side of the strip-shaped foundation extends into the foundation of the foundation; the structural columns 3 are vertically arranged above the strip-shaped foundation 2 in parallel, the structural columns 3 are arranged in one-to-one correspondence with the vertical wall of the existing culvert 1 and are tightly attached to the end part of the vertical wall of the existing culvert 1; wherein the designed elevation of the strip foundation 2 is not more than the base elevation of the existing culvert 1.

The longitudinal structural beam 4 is parallel to the end part of the top plate of the existing culvert 1 and horizontally arranged between two adjacent structural columns 3, and the beam end of the longitudinal structural beam 4 is fixedly connected with the column tops of the structural columns 3; the lateral wall of longitudinal structure roof beam 4 and the roof tip laminating of existing culvert 1, the top surface of longitudinal structure roof beam 4 and the roof upper surface parallel and level of existing culvert 1.

The top of the longitudinal structural beam 4 is provided with a first cantilever plate which is arranged on one side of the top plate far away from the existing culvert 1 and is arranged along the width direction of the top plate of the existing culvert 1; the bottom of the longitudinal structural beam 4 is provided with a second cantilever plate which is arranged at one side close to the top plate of the existing culvert 1; one side of the second raising plate is connected with the longitudinal structural beam 4, the other side of the second raising plate extends towards the center of the top plate of the existing culvert 1, and the top surface of the second raising plate is tightly attached to the bottom surface of the top plate of the existing culvert 1.

The plurality of transverse structural beams 5 are horizontally arranged between the two reinforcing units and are uniformly arranged at intervals along the width direction of a top plate of the existing culvert 1; one end of the transverse structural beam 5 is vertically fixed with the longitudinal structural beam 4 in one of the reinforcing units, and the other end of the transverse structural beam 5 is vertically fixed with the longitudinal structure 4 in the other reinforcing unit; the top surfaces of the transverse structural beams 5 are in close contact with the bottom surface of the roof of the existing culvert 1.

In the invention, the strip foundation 2 adopts a reinforced concrete foundation, the structural column 3 adopts a reinforced concrete column, and the longitudinal structural beam 4 and the transverse structural beam 5 both adopt concrete structural beams.

The section steel beam 6 horizontally penetrates through the transverse structural beam 5, one end of the section steel beam 6 is fixedly inserted into the longitudinal structural beam 4 in one reinforcing unit, and the other end of the section steel beam 6 is fixedly inserted into the longitudinal structural beam 4 in the other reinforcing unit; the plurality of section steel columns 7 are vertically and uniformly arranged on the longitudinal axis of the transverse structural beam 4, and the lower ends of the section steel columns 7 are fixed with the top surface of the beam end of the section steel beam 6; the stiffening rib plate 8 is arranged at the connecting node of the section steel column 7 and the section steel beam 6.

According to the invention, both the section steel beam 6 and the section steel column 7 adopt H-shaped steel, a web plate of the section steel beam 6 is vertically arranged, and a web plate of the section steel column 7 and a web plate of the section steel beam 6 are positioned in the same vertical plane; the lower end of the section steel column 7 is welded and fixed with the upper flange of the beam end of the section steel beam 6; the stiffening rib plates 8 are symmetrically arranged on two sides of the web plate of the section steel beam 6 and are arranged in pairs corresponding to two flange edges of the section steel column 7; the side of the stiffening rib plate 8 is welded and fixed with the web of the section steel beam 6, the upper end of the stiffening rib plate 8 is welded and fixed with the upper flange of the section steel beam 6, and the lower end is welded and fixed with the lower flange of the section steel beam 6.

The construction method of the road culvert reinforcement system comprises the following steps:

step 1, excavating the end part of a base of an existing culvert 1 according to the design size of a strip-shaped foundation 2 to obtain a foundation construction space; wherein, the foundation construction space which is positioned in the range of 200-300mm above the designed elevation of the substrate of the culvert 1 is formed by adopting a manual excavation mode.

And 2, constructing in the space of the foundation construction area to obtain a strip foundation 2.

And 3, constructing a structural column 3 above the strip foundation 2 corresponding to the vertical wall of the culvert 1.

And 4, constructing longitudinal structural beams 4 between two adjacent structural columns 3 along the width direction of the existing culvert 1, namely finishing the construction of one reinforcing unit.

And 5, repeating the operations of the steps 1-4 until the construction of another reinforcing unit is completed.

In the invention, in the process of constructing the structural columns 3, longitudinal structural beams 4 are additionally arranged between the adjacent structural columns 3, the outer sides of the tops of the longitudinal structural beams 4 are provided with first cantilever plates, and the inner sides of the bottoms of the longitudinal structural beams 4 are provided with second cantilever plates; the transverse overhanging width of the first cantilever plate is determined according to the width required by the top plate pavement of the existing culvert 1, and the longitudinal length of the first cantilever plate is arranged along the full length of the top plate of the existing culvert 1; the second cantilever plates extend towards the center direction of the top plate of the existing culvert 1, the top surfaces of the second cantilever plates are tightly attached to the bottom surface of the top plate of the existing culvert 1, and the longitudinal length of the second cantilever plates is arranged along the length direction of the top plate of the existing culvert 1; the thicknesses of the first picking plate and the second picking plate are determined according to the actual load calculation structure.

Meanwhile, a transverse structural beam is pulled between the longitudinal structural beams of the two fixing units along the width direction of the existing culvert; the transverse structural beam and the longitudinal structural beam are both concrete structural beams; the beam end of the section steel beam extends into the center line of the longitudinal structural beam; in order to achieve the anchoring performance of the section steel beam 6 on the longitudinal structural beam 4, section steel columns 7 are welded to the upper flanges of two ends of the section steel beam 6, and the center lines of the section steel columns 7 are aligned with the center line of the longitudinal structural beam 4; and welding stiffening rib plates 8 at the positions of two sides of the web plate of the section steel beam 6 corresponding to the flanges of the section steel column 7.

The reinforcing system for the road culvert and the construction method thereof have the advantages that the reinforcing system is simple in structure, clear in force transmission path, low in investment cost and good in reliability, and can achieve the purposes of convenient, economic and effective reinforcement; the reinforcing effect is good, the practical value is high, the obvious advantages are achieved in the aspects of economy and practicability, the normal passing of the culvert up and down is not influenced, and the use space is not occupied; the existing culvert is not damaged, a new load transmission way is established by utilizing an additional reinforcing system on the basis of fully utilizing the bearing capacity of the existing culvert structure, and the bearing capacity of the existing culvert structure is effectively improved.

The invention relates to a road culvert reinforcement system and a construction method thereof, wherein the reinforcement system aims at solving the problem that the existing culvert has insufficient bearing capacity; in the bearing system of the existing culvert, the reinforcing system which is stressed in cooperation with the existing culvert structure is formed by arranging the strip-shaped foundation, the structural columns, the longitudinal structural beams and the transverse structural beams, so that effective transmission of newly increased loads of the existing culvert is realized, the upper part and the lower part of the culvert are normally passed without being influenced, the existing culvert structure is not damaged under the condition that the using space is not occupied, and the bearing capacity of the existing culvert structure is fully utilized.

Examples

In this embodiment, an existing double-hole culvert is taken as an example, as shown in fig. 1, the existing double-hole culvert includes a base, a top plate, and three vertical walls arranged between the base and the top plate; in the embodiment, the passing direction of the existing double-hole culvert is taken as the length direction, one end of the length direction is a front end, and the other end of the length direction is a rear end; taking the direction vertical to the passing direction as the width direction; as shown in fig. 2 to 13, the present embodiment provides a road culvert reinforcing system, which includes two reinforcing units, a plurality of transverse structural beams 5, a plurality of section steel beams 6, a plurality of section steel columns 7, and a plurality of stiffening rib plates 8.

The two reinforcing units have the same structure and are symmetrically arranged at the front end and the rear end of the existing culvert 1; the reinforcing unit comprises a strip foundation 2, three structural columns 3 and two longitudinal structural beams 4; the strip-shaped foundations 2 are arranged at the end part of the base of the existing culvert 1 in parallel and are horizontally arranged along the width direction of the base of the existing culvert 1; one side of the strip-shaped foundation 2 is connected with the foundation of the existing culvert 1, and the other side of the strip-shaped foundation extends into the foundation of the foundation; the vertical parallel arrangement of a plurality of structure post 3 is in the top of bar basis 2, and three structure post 3 sets up with the three vertical wall body one-to-one of existing culvert 1 respectively to closely laminate with the vertical wall body tip of existing culvert 1 respectively.

The two longitudinal structural beams 4 are parallel to the end part of the top plate of the existing culvert 1 and are respectively and horizontally arranged between the two adjacent structural columns 3; the beam end of the longitudinal structure beam 4 is fixedly connected with the column top of the structure column 3, the side wall of the longitudinal structure beam 4 is attached to the end part of the top plate of the existing culvert 1, and the top surface of the longitudinal structure beam 4 is flush with the upper surface of the top plate of the existing culvert 1.

The top of the longitudinal structural beam 4 is provided with a first cantilever plate which is arranged on one side of the top plate far away from the existing culvert 1 and is arranged along the width direction of the top plate of the existing culvert 1; the bottom of the longitudinal structural beam 4 is provided with a second cantilever plate which is arranged at one side close to the top plate of the existing culvert 1; one side of the second cantilever plate is connected with the longitudinal structural beam 4, the other side of the second cantilever plate extends towards the center of the top plate of the existing culvert 1, and the top surface of the second cantilever plate is tightly attached to the bottom surface of the top plate of the existing culvert 1; in the embodiment, the second cantilever plates are arranged at the bottoms of the longitudinal structural beams 4, so that the boundary conditions of the top plate of the existing culvert are changed; the one-way plates of the one-way support of the top plate of the existing culvert are converted into the two-way plates of the two-way support, and the load capacity of the top plate of the existing culvert 1 is effectively improved.

The bar foundation 2 adopts a reinforced concrete foundation, the structural column 3 adopts a reinforced concrete column, and the longitudinal structural beam 4 and the transverse structural beam 5 both adopt concrete structural beams.

The plurality of transverse structural beams 5 are horizontally arranged between the two reinforcing units and are uniformly arranged at intervals along the width direction of a top plate of the existing culvert 1; one end of the transverse structural beam 5 is vertically fixed with the longitudinal structural beam 4 in one of the reinforcing units, and the other end of the transverse structural beam 5 is vertically fixed with the longitudinal structure 4 in the other reinforcing unit; the top surface of the transverse structural beam 5 is in close contact with the bottom surface of the top plate of the existing culvert 1; through a plurality of transverse structure roof beams 5 additionally arranged on the bottom surface of the top plate of the existing culvert 1, the top plate of the existing culvert 1 is divided into a plurality of smaller plates, and under the condition that the top plate of the existing culvert 1 is not reinforced, the load capacity of the top plate of the existing culvert 1 is further increased.

The section steel beam 6 horizontally penetrates through the transverse structural beam 5, one end of the section steel beam 6 is fixedly inserted into the longitudinal structural beam 4 in one reinforcing unit, and the other end of the section steel beam 6 is fixedly inserted into the longitudinal structural beam 4 in the other reinforcing unit; the plurality of section steel columns 7 are vertically and uniformly arranged on the longitudinal axis of the transverse structural beam 4, and the lower ends of the section steel columns 7 are fixed with the top surface of the beam end of the section steel beam 6; the stiffening rib plate 8 is arranged at the connecting node of the section steel column 7 and the section steel beam 6.

The section steel beam 6 and the section steel column 7 are both made of H-shaped steel, a web plate of the section steel beam 6 is vertically arranged, and a web plate of the section steel column 7 and a web plate of the section steel beam 6 are located in the same vertical plane; the lower end of the section steel column 7 is welded and fixed with the upper flange of the beam end of the section steel beam 6; the stiffening rib plates 8 are symmetrically arranged on two sides of the web plate of the section steel beam 6 and are arranged in pairs corresponding to two flange edges of the section steel column 7; the side of the stiffening rib plate 8 is welded and fixed with the web of the section steel beam 6, the upper end of the stiffening rib plate 8 is welded and fixed with the upper flange of the section steel beam 6, and the lower end is welded and fixed with the lower flange of the section steel beam 6.

The construction method of the road culvert reinforcement system in the embodiment specifically comprises the following steps:

step 1, calculating a structure according to a structure, determining the size of a strip foundation 2, and excavating two sides of a base of an existing culvert 1 to obtain a foundation construction space; in the embodiment, the design elevation of the strip foundation 2 does not exceed the base elevation of the existing culvert 1; wherein, in the excavation process of the foundation construction space, manual excavation is adopted within the range of 200-300mm above the designed elevation of the foundation; the bearing capacity of the foundation soil of the foundation construction space meets the design bearing requirement; when the design bearing requirement is not met, the foundation soil needs to be processed until the designed foundation bearing capacity is reached; and then sequentially pouring a plain concrete cushion layer, binding steel bars and installing a template in the foundation construction space, and finally pouring concrete and removing the template to finish the construction of the strip foundation.

Step 2, before the concrete is poured on the strip foundation 2, pre-burying longitudinal steel bars of the structural columns 3 in the end part area, corresponding to the vertical wall body of the existing culvert 1, of the strip foundation 2; then, binding steel bars and installing modules in sequence; finally, pouring concrete to finish the construction of the structural column; in this embodiment, the structural columns act as vertical load bearing members for the reinforcing system.

Step 3, constructing longitudinal structural beams 4 between the column tops of the adjacent structural columns 3 along the width direction of the existing culvert 1; a first cantilever plate is arranged on the outer side of the top of the longitudinal structural beam 4, and a second cantilever plate is arranged on the inner side of the bottom of the longitudinal structural beam 4; the extending length of the first cantilever plate is determined according to the required width of the road surface, and the first cantilever plate is longitudinally arranged along the full length of the two sides of the top surface of the existing culvert 1; the second is chosen the board and is extended outside the roof bottom surface inside preset length of existing culvert 1, and the top surface that the board was chosen to the second flushes the laminating with the roof bottom surface of existing culvert 1, ensures that roof and longitudinal structure roof beam 4 undertake the load jointly after the roof of existing culvert 1 increases the load newly.

Step 4, pulling a plurality of transverse structural beams 5 between the longitudinal structural beams 4 along the width direction of the existing culvert 1; the beam section size and the distance of the transverse structural beam 5 are determined by calculation according to the size of the bearing load; the top surface of the transverse structural beam 5 is flush and attached to the bottom surface of the top plate of the existing culvert 1, and the effective transmission of vertical force between the transverse structural beam and the top plate is ensured.

Step 5, pre-burying a section steel beam 6 in the transverse structural beam 5 before pouring concrete in the transverse structural beam 5; the bending resistance and the shearing resistance bearing capacity of the transverse structural beam 5 are improved by additionally arranging the section steel beam 6; at the same time, the integrity of the horizontal load bearing members of the reinforcement system is further enhanced.

Step 6, welding section steel columns 7 with preset lengths on top surfaces of flanges at two ends of the section steel beams 6, and embedding and fixing the section steel columns 7 in the longitudinal structural beams 4 in advance; by additionally arranging the section steel columns 7, the anchoring performance of the two ends of the section steel beams 6 at the longitudinal structural beam 4 can meet the requirement.

Step 7, welding stiffening rib plates 8 at the positions on two sides of the web plate of the section steel beam 6 corresponding to the flanges of the section steel column 7; by additionally arranging the stiffening rib plates 8, the overall stability of the connecting nodes of the section steel beams 6 and the section steel columns 7 is ensured.

And 8, after the strength of the reinforced structural material meets the design requirement and the construction quality meets the requirements of the current specification and technical standard, the reinforced structural material can be put into use.

Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.