Road culvert reinforcement system and construction method thereof

Abstract

The present invention discloses a road culvert reinforcement system and a construction method thereof, comprising two reinforcement units; the two reinforcement units have the same structure and are symmetrically arranged at the front and rear ends of an existing culvert; the reinforcement units comprise a strip foundation, a plurality of structural columns and a longitudinal structural beam; the strip foundation is arranged in parallel at the base end of the existing culvert, and the plurality of structural columns are arranged vertically and in parallel above the strip foundation, and the structural columns are tightly fitted with the vertical wall ends of the existing culvert; the longitudinal structural beam is horizontally arranged between two adjacent structural columns, and a first cantilever plate is provided at the top of the longitudinal structural beam, and the first cantilever plate is arranged along the width direction of the top plate of the existing culvert; a second cantilever plate is provided at the bottom of the longitudinal structural beam, and the top surface of the second cantilever plate is tightly fitted with the bottom surface of the top plate of the existing culvert; the present invention fully utilizes the bearing capacity of the existing culvert structure to establish a new load transfer path, with a clear force transmission path, thereby effectively improving the bearing capacity of the existing culvert structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of building structure reinforcement, and in particular relates to a road culvert reinforcement system and a construction method thereof. Background Art

[0002] Culverts are passages built into the roadbeds of railways and highways, usually serving as passages for people, vehicles, and water on both sides of the road. Currently, culvert structures have been widely used in railway construction, highway construction, bridge construction, agricultural water conservancy, and other fields. Because culvert structures are often located outdoors and have been exposed to harsh natural environments for a long time, some culvert structures have experienced concrete cracking, surface peeling and exposed steel bars, and steel corrosion, which have reduced the reliability of the culvert structures to a certain extent. In recent years, with the rapid development of the economy and society, the increase in vehicle operating time, and the improvement in vehicle load, transportation capacity, and speed have led to increased deformation of some existing culvert structures, reduced bearing capacity, and deteriorated stability, posing a serious threat to the safety of culvert structures. Therefore, it is urgent to carry out necessary reinforcement treatment on existing culvert structures with the above-mentioned problems to ensure the safe operation of road transportation and production.

[0003] At present, the commonly used reinforcement technologies for existing culvert structures are mainly steel bonding method, cross-section enlargement method or bridge deck reinforcement layer method. The above methods all improve the overall bearing capacity of the culvert structure to a certain extent by reinforcing the local components of the existing culvert structure. However, the above methods are mostly used to reinforce the diseased culvert structure and cannot be applied to situations where the road transport load increases significantly. They have certain limitations in practical engineering applications.

[0004] Among them, the steel bonding method is to use adhesives to stick steel plates to the parts that need to be reinforced, so that the steel plates become part of the culvert structural components. The overall working performance of the steel plates depends on the performance of the adhesives. The bonding performance is sensitive to temperature changes, and the adhesives will age after long-term use. The long-term effect of this method of reinforcement needs to be studied, and the overall bearing capacity after reinforcement is limited. The cross-section enlargement method is to increase the cross-sectional size of the top plate or side wall of the culvert structure, or increase the number of steel bars in the culvert structural components to improve the overall bearing capacity of the culvert structure. This method requires a lot of The rebar planting operation will cause certain damage to the original culvert structural components and there is a problem of great construction difficulty. In addition, this method will reduce the size of the culvert opening, affecting the normal passage of vehicles in the culvert. The bridge deck reinforcement layer method is to lay a reinforced concrete layer on the top plate of the existing culvert structure so that it and the original culvert structure are subjected to force together. Although the stiffness and bearing capacity of the culvert structure are improved by increasing the height of the top plate, the deadweight of the original structure is increased, the load on the foundation is increased, and the road surface layer of the original culvert needs to be broken during the construction process, which cannot meet the normal passage of vehicles and personnel on the top surface of the culvert.

[0005] To sum up, in order to address some or all of the above-mentioned problems existing in existing reinforcement technologies, it is urgent to propose a reinforcement method that has clear force transmission, convenient construction, wide applicability, economy and high efficiency, so as to effectively solve the above-mentioned defects of existing reinforcement methods. Summary of the Invention

[0006] In response to the technical problems existing in the prior art, the present invention provides a road culvert reinforcement system and a construction method thereof to solve the technical problem that the existing culvert structure reinforcement method is not applicable to situations where the road transport load increases significantly and has great limitations.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] The present invention provides a road culvert reinforcement system, comprising two reinforcement units; the two reinforcement units have the same structure and are symmetrically arranged at the front and rear ends of an existing culvert; the reinforcement units include a strip foundation, a plurality of structural columns, and a longitudinal structural beam; the strip foundation is arranged parallel to the base end of the existing culvert, and the plurality of structural columns are arranged vertically and parallel above the strip foundation, the structural columns are arranged in a one-to-one correspondence with the vertical walls of the existing culvert, and are tightly fitted with the ends of the vertical walls of the existing culvert;

[0009] The longitudinal structural beam is horizontally arranged between two adjacent structural columns, the side wall of the longitudinal structural beam is in contact with the end of the roof of the existing culvert, and the top surface of the longitudinal structural beam is flush with the upper surface of the roof of the existing culvert; a first cantilever plate is arranged on the top of the longitudinal structural beam, the first cantilever plate is located on the side away from the roof of the existing culvert, and is arranged along the width direction of the roof of the existing culvert;

[0010] A second cantilever plate is provided at the bottom of the longitudinal structural beam, and the second cantilever plate is provided on the side close to the top plate of the existing culvert; one side of the second cantilever plate is connected to the longitudinal structural beam, and the other side extends toward the center of the top plate of the existing culvert, and the top surface of the second cantilever plate is tightly fitted with the bottom surface of the top plate of the existing culvert.

[0011] Furthermore, it also includes a plurality of transverse structural beams; the transverse structural beams are horizontally arranged between two reinforcement units and are evenly spaced along the width direction of the top plate of the existing culvert; one end of the transverse structural beam is vertically fixed to the longitudinal structural beam in one of the reinforcement units, and the other end of the transverse structural beam is vertically fixed to the longitudinal structure in the other reinforcement 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.

[0012] Furthermore, both the longitudinal structural beams and the transverse structural beams are made of concrete structural beams.

[0013] Furthermore, it also includes several steel beams; the steel beams are horizontally inserted in the transverse structural beams, one end of the steel beams is inserted and fixed in the longitudinal structural beams in one of the reinforcement units, and the other end of the steel beams is inserted and fixed in the longitudinal structural beams in another reinforcement unit.

[0014] Furthermore, it also includes a plurality of steel columns, which are evenly arranged vertically on the longitudinal axis of the transverse structural beam, and the lower ends of the steel columns are fixed to the top surface of the beam end of the steel beam.

[0015] Furthermore, stiffening ribs are provided at the connection nodes between the steel columns and the steel beams.

[0016] Furthermore, both the steel beam and the steel column are made of H-shaped steel; the web of the steel beam is arranged vertically, and the web of the steel column and the web of the steel beam are located in the same vertical plane; the lower end of the steel column is welded and fixed to the upper flange of the beam end of the steel beam.

[0017] Furthermore, the design elevation of the strip foundation shall not exceed the base elevation of the existing culvert.

[0018] The present invention also provides a construction method of a road culvert reinforcement system, comprising the following steps:

[0019] According to the design size of the strip foundation, the foundation construction space is obtained by excavating the end of the existing culvert base;

[0020] In the foundation construction area space, the strip foundation is constructed;

[0021] Construct structural columns above the strip foundation, corresponding to the vertical wall of the existing culvert;

[0022] Between two adjacent structural columns, a longitudinal structural beam is constructed along the width of the existing culvert, which means that the construction of one reinforcement unit is completed;

[0023] Repeat the above steps until the construction of another reinforcement unit is completed.

[0024] Furthermore, in the process of excavating the base end of the existing culvert to obtain the foundation construction space, the foundation construction space located within the range of 200-300mm above the base design elevation of the existing culvert is formed by manual excavation.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention provides a road culvert reinforcement system and a construction method thereof, wherein strip foundations are arranged on both sides of the base of an existing culvert, structural columns are arranged symmetrically at the vertical walls of the existing culvert above the strip foundations, and longitudinal structural beams are arranged between the structural columns to form a main load-bearing frame system of the entire reinforcement system; the structural columns serve as the main vertical load-bearing components, and can bear the load on the top plate of the reinforced existing culvert and directly transfer it to the foundation; a first cantilever plate is arranged on one side of the top of the longitudinal structural beam, thereby providing conditions for widening the road surface on the top plate of the existing culvert, which is suitable for the situation where the existing road surface is insufficient in width; a second strip plate is arranged on one side of the bottom of the longitudinal structural beam, and the top surface of the second strip plate is aligned with the existing The bottom surface of the top plate of the existing culvert fits tightly, providing support conditions for both sides of the top plate of the existing culvert, realizing the conversion from a one-way support to a two-way support two-way plate structure, and improving the bearing capacity of the top plate of the existing culvert without reinforcing the top plate of the existing culvert; when the top plate of the existing culvert is loaded, the top plate will experience vertical flexural deformation, and the second cantilever plate in the reinforcement system can limit its further deformation. Through deformation coordination and adjustment, the load on the top plate of the existing culvert structure can be effectively transferred to the main bearing frame system of the reinforcement system, thereby realizing the coordinated force of the existing culvert structure and the reinforcement system. It is suitable for the reinforcement treatment of existing culverts when the road transportation load increases significantly, and has fewer limitations.

[0027] Furthermore, by arranging a number of transverse structural beams between the two reinforcement units, the transverse structural beams are used to divide the top plate of the existing culvert into a number of smaller load-bearing plates, thereby effectively improving the load capacity of the top plate of the existing culvert; and the top surface of the transverse structural beam is brought into close contact with the bottom surface of the top plate of the existing culvert, which can further limit the vertical flexural deformation of the top plate and ensure the effective transmission of vertical force between the top plate of the existing culvert and the transverse structural beams.

[0028] Furthermore, by horizontally passing the steel beam through the transverse structural beam, the bending performance and shear bearing capacity of the transverse structural beam are effectively improved; the two ends of the steel beam are extended into and anchored in the longitudinal structural beam, thereby enhancing the integrity between the longitudinal and transverse structural beams in the reinforcement system.

[0029] Furthermore, by setting steel columns in the longitudinal structural beams and fixing the steel columns to the ends of the steel beams, the anchoring performance between the steel beams and the longitudinal structural beams is effectively enhanced, ensuring the reliability of the load on the top plate of the existing culvert being transferred to the main load-bearing frame system of the reinforcement system.

[0030] Furthermore, by arranging stiffening ribs at the connection nodes between the steel columns and the steel beams, the overall stability of the connection nodes between the steel columns and the steel beams is effectively improved.

[0031] Furthermore, the base design elevation of the strip foundation is set not to exceed the base elevation of the existing culvert, so as to prevent the disturbance of the original foundation soil layer of the existing culvert during the excavation project and ensure the stability of the existing culvert foundation and foundation soil layer.

[0032] Furthermore, the foundation construction space located within the range of 200-300mm above the design elevation of the base of the existing culvert is formed by manual excavation to avoid damage to the original soil layer of the base by mechanical over-excavation.

[0033] The road culvert reinforcement system and construction method described in the present invention have a simple structure, a clear force transmission path, a low investment cost, and good reliability, and can achieve convenient, economical and effective reinforcement goals; the reinforcement effect is good and the practical value is high, and it has obvious advantages in terms of economy and practicality, does not affect the normal traffic above and below the culvert, and does not occupy the usable space; it does not cause damage to the existing culvert, and on the basis of fully utilizing the bearing capacity of the existing culvert structure, uses the additional reinforcement system to establish a new load transmission path, effectively improving the bearing capacity of the existing culvert structure, is operational and popularizable, and can bring significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is an axonometric diagram of an existing double-hole culvert structure in an embodiment;

[0035] Figure 2 is an axonometric structural diagram of the reinforcement system according to the embodiment;

[0036] Figure 3 A front view of the reinforcement system according to an embodiment;

[0037] Figure 4 is a cross-sectional view of the reinforcement system according to an embodiment;

[0038] Figure 5 is an axonometric diagram of the arrangement of the strip foundation in the embodiment;

[0039] Figure 6 A cross-sectional view of the arrangement of the strip foundation in the embodiment;

[0040] Figure 7 is an axonometric diagram of the arrangement of the structural columns in the embodiment;

[0041] Figure 8 This is a cross-sectional view of the arrangement of the structural columns in the embodiment;

[0042] Figure 9 This is an axonometric diagram of the arrangement of the longitudinal structural beams in the embodiment;

[0043] Figure 10This is a cross-sectional view of the arrangement of the longitudinal structural beams in the embodiment;

[0044] Figure 11 This is a cross-sectional view of the arrangement of the transverse structural beams in the embodiment;

[0045] Figure 12 This is a cross-sectional view of the arrangement of the section steel beams in the embodiment;

[0046] Figure 13 Schematic diagram of the connection structure between the section steel beam and the section steel column in the embodiment.

[0047] Among them, 1 is an existing culvert, 2 is strip foundation, 3 is structural column, 4 is longitudinal structural beam, 5 is transverse structural beam, 6 is steel beam, 7 is steel column, 8 is stiffening rib plate. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] The present invention provides a road culvert reinforcement system, which includes two reinforcement 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 ribs 8.

[0050] The two reinforcement units have the same structure and are symmetrically arranged at the front and rear ends of the existing culvert 1; the reinforcement units include a strip foundation 2, three structural columns 3 and two longitudinal structural beams 4; the strip foundation 2 is arranged parallel to the base end of the existing culvert 1 and horizontally along the base width direction of the existing culvert 1; one side of the strip foundation 2 is connected to the base of the existing culvert 1, and the other side extends into the base foundation; a number of structural columns 3 are arranged vertically and parallel above the strip foundation 2, and the structural columns 3 are arranged one-to-one in correspondence with the vertical walls of the existing culvert 1 and are tightly fitted with the ends of the vertical walls of the existing culvert 1; wherein the design elevation of the strip foundation 2 does not exceed the base elevation of the existing culvert 1.

[0051] The longitudinal structural beam 4 is parallel to the end of the top plate of the existing culvert 1 and is horizontally arranged between two adjacent structural columns 3. The beam end of the longitudinal structural beam 4 is fixedly connected to the column top of the structural column 3; the side wall of the longitudinal structural beam 4 is in contact with the end 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.

[0052] A first cantilever is provided at the top of the longitudinal structural beam 4, which is located on the side away from the top plate of the existing culvert 1 and is arranged along the width direction of the top plate of the existing culvert 1; a second cantilever is provided at the bottom of the longitudinal structural beam 4, which is located on the side close to the top plate of the existing culvert 1; one side of the second cantilever is connected to the longitudinal structural beam 4, and the other side extends toward the center of the top plate of the existing culvert 1, and the top surface of the second cantilever is tightly fitted with the bottom surface of the top plate of the existing culvert 1.

[0053] Several transverse structural beams 5 are horizontally arranged between two reinforcement units and are evenly spaced along the width direction of the top plate of the existing culvert 1; one end of the transverse structural beam 5 is vertically fixed to the longitudinal structural beam 4 in one of the reinforcement units, and the other end of the transverse structural beam 5 is vertically fixed to the longitudinal structure 4 in the other reinforcement 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.

[0054] In the present invention, the strip foundation 2 is a reinforced concrete foundation, the structural column 3 is a reinforced concrete column, and the longitudinal structural beam 4 and the transverse structural beam 5 are both concrete structural beams.

[0055] The steel beam 6 is horizontally inserted into the transverse structural beam 5, one end of the steel beam 6 is inserted and fixed in the longitudinal structural beam 4 in one of the reinforcement units, and the other end of the steel beam 6 is inserted and fixed in the longitudinal structural beam 4 in the other reinforcement unit; a number of steel columns 7 are vertically and evenly arranged on the longitudinal axis of the transverse structural beam 4, and the lower ends of the steel columns 7 are fixed to the top surface of the beam end of the steel beam 6; the stiffening ribs 8 are arranged at the connection nodes between the steel columns 7 and the steel beam 6.

[0056] In the present invention, the steel beam 6 and the steel column 7 are both made of H-shaped steel, the web of the steel beam 6 is arranged vertically, and the web of the steel column 7 and the web of the steel beam 6 are located in the same vertical plane; the lower end of the steel column 7 is welded and fixed to the upper flange of the beam end of the steel beam 6; the stiffening ribs 8 are symmetrically arranged on both sides of the web of the steel beam 6, and are arranged in pairs corresponding to the two flanges of the steel column 7; the side edges of the stiffening ribs 8 are welded and fixed to the web of the steel beam 6, the upper end of the stiffening ribs 8 is welded and fixed to the upper flange of the steel beam 6, and the lower end is welded and fixed to the lower flange of the steel beam 6.

[0057] The construction method of a road culvert reinforcement system according to the present invention comprises the following steps:

[0058] Step 1: According to the design size of the strip foundation 2, a foundation construction space is excavated at the base end of the existing culvert 1; wherein, the foundation construction space located within the range of 200-300mm above the design elevation of the base of the existing culvert 1 is formed by manual excavation.

[0059] Step 2: Construct strip foundation 2 in the foundation construction area.

[0060] Step 3: Construct the structural column 3 above the strip foundation 2 corresponding to the vertical wall of the existing culvert 1.

[0061] In step 4, a longitudinal structural beam 4 is constructed between two adjacent structural columns 3 along the width direction of the existing culvert 1, that is, the construction of one reinforcement unit is completed.

[0062] Step 5: Repeat steps 1-4 above until the construction of another reinforcement unit is completed.

[0063] In the present invention, during the construction of the structural columns 3, a longitudinal structural beam 4 is added between the adjacent structural columns 3, a first cantilever is set on the outer side of the top of the longitudinal structural beam 4, and a second cantilever is set on the inner side of the bottom of the longitudinal structural beam 4; the lateral outward extension width of the first cantilever is determined according to the required width of the top plate pavement of the existing culvert 1, and the longitudinal length of the first cantilever is arranged along the length of the top plate of the existing culvert 1; the second cantilever extends toward the center direction of the top plate of the existing culvert 1, the top surface of the second cantilever is tightly fitted with the bottom surface of the top plate of the existing culvert 1, and the longitudinal length of the third cantilever is arranged along the length direction of the top plate of the existing culvert 1; the thickness of the first cantilever and the second cantilever is determined according to the actual load calculation structure.

[0064] At the same time, a transverse structural beam is stretched between the longitudinal structural beams of the two fixed units along the width direction of the existing culvert; both the transverse structural beam and the longitudinal structural beam are concrete structural beams; among them, a steel beam is arranged throughout the transverse structural beam, and the beam end of the steel beam is extended to the center line of the longitudinal structural beam; in order to ensure the anchoring performance of the steel beam 6 on the longitudinal structural beam 4, steel columns 7 are welded on the upper flanges at both ends of the steel beam 6, and the center line of the steel column 7 is aligned with the center line of the longitudinal structural beam 4; stiffening ribs 8 are welded on both sides of the web of the steel beam 6 corresponding to the flanges of the steel column 7.

[0065] The road culvert reinforcement system and construction method described in the present invention have a simple structure, a clear force transmission path, a low investment cost, and good reliability, and can achieve convenient, economical and effective reinforcement goals; the reinforcement effect is good and the practical value is high, and it has obvious advantages in terms of economy and practicality, does not affect the normal traffic above and below the culvert, and does not occupy the usable space; does not cause damage to the existing culvert, and fully utilizes the bearing capacity of the existing culvert structure. By using an additional reinforcement system, a new load transmission path is established, and the bearing capacity of the existing culvert structure is effectively improved.

[0066] The road culvert reinforcement system and construction method described in the present invention are intended to solve the problem of insufficient bearing capacity of existing culverts. In the bearing system of the existing culvert, a reinforcement system that cooperates with the existing culvert structure to bear force is formed by arranging strip foundations, structural columns, longitudinal structural beams, and transverse structural beams, thereby achieving effective transmission of the newly added load of the existing culvert. Without affecting the normal passage above and below the culvert and without occupying usable space, the existing culvert structure is not damaged and the bearing capacity of the existing culvert structure is fully utilized.

[0067] Example

[0068] This embodiment takes an existing double-hole culvert as an example. Figure 1 As shown, the existing double-hole culvert includes a base, a top plate and three vertical walls arranged between the base and the top plate; in this embodiment, the passage direction of the existing double-hole culvert is taken as the length direction, one end of the length direction is the front end, and the other end is the rear end; the width direction is perpendicular to the passage direction; as shown in the attached Figure 2-13 As shown, this embodiment provides a road culvert reinforcement system, including two reinforcement units, a plurality of transverse structural beams 5, a plurality of steel beams 6, a plurality of steel columns 7 and a plurality of stiffening ribs 8.

[0069] The two reinforcement units have the same structure and are symmetrically arranged at the front and rear ends of the existing culvert 1; the reinforcement unit includes a strip foundation 2, three structural columns 3 and two longitudinal structural beams 4; the strip foundation 2 is arranged parallel to the base end of the existing culvert 1 and horizontally along the base width direction of the existing culvert 1; one side of the strip foundation 2 is connected to the base of the existing culvert 1, and the other side extends into the base foundation; a number of structural columns 3 are arranged vertically and parallel above the strip foundation 2, and the three structural columns 3 are respectively arranged in one-to-one correspondence with the three vertical walls of the existing culvert 1, and are respectively tightly fitted with the ends of the vertical walls of the existing culvert 1.

[0070] The two longitudinal structural beams 4 are parallel to the ends of the top plate of the existing culvert 1 and are horizontally arranged between two adjacent structural columns 3; the beam ends of the longitudinal structural beams 4 are fixedly connected to the column tops of the structural columns 3, the side walls of the longitudinal structural beams 4 are in contact with the ends of the top plate of the existing culvert 1, and the top surface of the longitudinal structural beams 4 is flush with the upper surface of the top plate of the existing culvert 1.

[0071] A first cantilever is provided at the top of the longitudinal structural beam 4, and the first cantilever is provided on the side away from the top plate of the existing culvert 1, and is provided along the width direction of the top plate of the existing culvert 1; a second cantilever is provided at the bottom of the longitudinal structural beam 4, and the second cantilever is provided on the side close to the top plate of the existing culvert 1; one side of the second cantilever is connected to the longitudinal structural beam 4, and the other side extends toward the center direction of the top plate of the existing culvert 1, and the top surface of the second cantilever is tightly fitted with the bottom surface of the top plate of the existing culvert 1; in this embodiment, by providing the second cantilever at the bottom of the longitudinal structural beam 4, the boundary conditions of the top plate of the existing culvert are changed; the one-way plate with one-way support of the top plate of the existing culvert is converted into a two-way plate with two-way support, thereby effectively improving the load capacity of the top plate of the existing culvert 1.

[0072] 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.

[0073] A plurality of transverse structural beams 5 are horizontally arranged between two reinforcement units and are evenly spaced along the width direction of the top plate of the existing culvert 1; one end of the transverse structural beam 5 is vertically fixed to the longitudinal structural beam 4 in one of the reinforcement units, and the other end of the transverse structural beam 5 is vertically fixed to the longitudinal structure 4 in the other reinforcement 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; by adding a plurality of transverse structural beams 5 on the bottom surface of the top plate of the existing culvert 1, the top plate of the existing culvert 1 is divided into multiple smaller blocks, and the load capacity of the top plate of the existing culvert 1 is further increased without reinforcing the top plate of the existing culvert 1.

[0074] The steel beam 6 is horizontally inserted into the transverse structural beam 5, one end of the steel beam 6 is inserted and fixed in the longitudinal structural beam 4 in one of the reinforcement units, and the other end of the steel beam 6 is inserted and fixed in the longitudinal structural beam 4 in the other reinforcement unit; a number of steel columns 7 are vertically and evenly arranged on the longitudinal axis of the transverse structural beam 4, and the lower ends of the steel columns 7 are fixed to the top surface of the beam end of the steel beam 6; the stiffening ribs 8 are arranged at the connection nodes between the steel columns 7 and the steel beam 6.

[0075] The steel beam 6 and the steel column 7 are both made of H-shaped steel. The web of the steel beam 6 is arranged vertically, and the web of the steel column 7 and the web of the steel beam 6 are located in the same vertical plane; the lower end of the steel column 7 is welded and fixed to the upper flange of the beam end of the steel beam 6; the stiffening ribs 8 are symmetrically arranged on both sides of the web of the steel beam 6, and are arranged in pairs corresponding to the two flanges of the steel column 7; the side edges of the stiffening ribs 8 are welded and fixed to the web of the steel beam 6, the upper end of the stiffening ribs 8 is welded and fixed to the upper flange of the steel beam 6, and the lower end is welded and fixed to the lower flange of the steel beam 6.

[0076] The construction method of a road culvert reinforcement system described in this embodiment specifically includes the following steps:

[0077] Step 1. Determine the size of the strip foundation 2 according to the structural calculation structure, and excavate on both sides of the base of the existing culvert 1 to obtain the foundation construction space; in this embodiment, the design elevation of the strip foundation 2 does not exceed the base elevation of the existing culvert 1; wherein, during the excavation of the foundation construction space, manual excavation is adopted in the range of 200-300mm above the base design elevation; the bearing capacity of the foundation soil of the foundation construction space meets the design bearing requirements; when it does not meet the design bearing requirements, the foundation soil needs to be processed until the designed foundation bearing capacity is reached; thereafter, a plain concrete cushion layer is poured in the foundation construction space, steel bars are tied, and formwork is installed. Finally, concrete is poured, the formwork is removed, and the strip foundation construction is completed.

[0078] Step 2: Before pouring concrete for the strip foundation 2, embed the longitudinal reinforcement of the structural column 3 in the end area of the vertical wall of the existing culvert 1 corresponding to the strip foundation 2; then, tie the reinforcement and install the modules in sequence; finally, pour concrete to complete the construction of the structural column; in this embodiment, the structural column serves as the vertical load-bearing component of the reinforcement system.

[0079] Step 3. Construct a longitudinal structural beam 4 between the tops of adjacent structural columns 3 along the width direction of the existing culvert 1; set a first cantilever plate on the outer side of the top of the longitudinal structural beam 4, and set a second cantilever plate on the inner side of the bottom of the longitudinal structural beam 4; the outward extension length of the first cantilever plate is determined according to the required width of the road surface, and its longitudinal direction is arranged along the length of both sides of the top surface of the existing culvert 1; the second cantilever plate extends to a preset length inside the bottom surface of the top plate of the existing culvert 1, and the top surface of the second cantilever plate is flush with the bottom surface of the top plate of the existing culvert 1, ensuring that after the new load is added to the top plate of the existing culvert 1, the top plate and the longitudinal structural beam 4 share the load.

[0080] Step 4: Along the width direction of the existing culvert 1, several transverse structural beams 5 are stretched between the longitudinal structural beams 4; the cross-sectional size and spacing of the transverse structural beams 5 are determined by calculation according to the size of the load they bear; the top surface of the transverse structural beams 5 is flush with the bottom surface of the top plate of the existing culvert 1 to ensure effective transmission of vertical force between the two.

[0081] Step 5: Before pouring concrete into the transverse structural beam 5, pre-embed the steel beam 6 inside the transverse structural beam 5; by adding the steel beam 6, the bending and shear bearing capacity of the transverse structural beam 5 is improved; at the same time, the integrity of the horizontal load-bearing components of the reinforcement system is further enhanced.

[0082] Step 6: Weld steel columns 7 of preset length to the top surfaces of the flanges at both ends of the steel beam 6, and embed the steel columns 7 in the longitudinal structural beam 4; by adding steel columns 7, it is ensured that the anchoring performance of both ends of the steel beam 6 in the longitudinal structural beam 4 meets the requirements.

[0083] Step 7: Weld stiffening ribs 8 on both sides of the web of the steel beam 6 corresponding to the flange of the steel column 7; by adding stiffening ribs 8, the overall stability of the connection node between the steel beam 6 and the steel column 7 is ensured.

[0084] Step 8: After ensuring that the strength of the reinforced structural materials meets the design requirements and the construction quality meets the requirements of current specifications and technical standards, it can be put into use.

[0085] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the above embodiments, or that some of the technical features may be replaced with equivalents; such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A road culvert reinforcement system, characterized in that: The invention comprises two reinforcement units; the two reinforcement units have the same structure and are symmetrically arranged at the front and rear ends of the existing culvert (1); the reinforcement units comprise a strip foundation (2), a plurality of structural columns (3) and a longitudinal structural beam (4); the strip foundation (2) is arranged parallel to the base end of the existing culvert (1), and the plurality of structural columns (3) are arranged vertically and parallel above the strip foundation (2); the structural columns (3) are arranged in a one-to-one correspondence with the vertical wall of the existing culvert (1) and are tightly fitted with the ends 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 in contact with the end of the top plate of the existing culvert (1); the top surface of the longitudinal structural beam (4) is flush with the upper surface of the top plate of the existing culvert (1); a first lifting plate is provided on the top of the longitudinal structural beam (4); the first lifting plate is located on a side away from the top plate of the existing culvert (1) and is arranged along the width direction of the top plate of the existing culvert (1); A second overhang plate is provided at the bottom of the longitudinal structural beam (4), and the second overhang plate is provided on a side close to the top plate of the existing culvert (1); one side of the second overhang plate is connected to the longitudinal structural beam (4), and the other side extends toward the center of the top plate of the existing culvert (1); the top surface of the second overhang plate is closely fitted with the bottom surface of the top plate of the existing culvert (1); It also includes a plurality of transverse structural beams (5); the transverse structural beams (5) are horizontally arranged between the two reinforcement units and are evenly spaced along the width direction of the top plate of the existing culvert (1); one end of the transverse structural beam (5) is vertically fixed to the longitudinal structural beam (4) in one of the reinforcement units, and the other end of the transverse structural beam (5) is vertically fixed to the longitudinal structural beam (4) in the other reinforcement 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); It also includes a plurality of steel beams (6); the steel beams (6) are horizontally inserted into the transverse structural beams (5), one end of the steel beams (6) is inserted and fixed into the longitudinal structural beams (4) in one of the reinforcement units, and the other end of the steel beams (6) is inserted and fixed into the longitudinal structural beams (4) in another reinforcement unit; It also includes a plurality of steel columns (7), the steel columns (7) are evenly arranged vertically on the longitudinal axis of the longitudinal structural beam (4), and the lower ends of the steel columns (7) are fixed to the top surface of the beam end of the steel beam (6); The design elevation of the strip foundation (2) shall not exceed the base elevation of the existing culvert (1).

2. A road culvert reinforcement system according to claim 1, characterized in that: The longitudinal structural beam (4) and the transverse structural beam (5) are both made of concrete structural beams.

3. A road culvert reinforcement system according to claim 1, characterized in that: A stiffening rib plate (8) is provided at a connection node between the section steel column (7) and the section steel beam (6).

4. A road culvert reinforcement system according to claim 1, characterized in that: The steel beam (6) and the steel column (7) are both made of H-shaped steel; the web of the steel beam (6) is arranged vertically, and the web of the steel column (7) and the web of the steel beam (6) are located in the same vertical plane; the lower end of the steel column (7) is welded and fixed to the upper flange of the beam end of the steel beam (6).

5. The construction method of a road culvert reinforcement system according to claim 1, characterized in that: The following steps are involved: According to the design size of the strip foundation (2), a foundation construction space is obtained by excavating the end of the base of the existing culvert (1); In the foundation construction area, a strip foundation (2) is constructed; Construct a structural column (3) above the strip foundation (2) corresponding to the vertical wall of the existing culvert (1); Between two adjacent structural columns (3), a longitudinal structural beam (4) is constructed along the width direction of the existing culvert (1), i.e., the construction of one reinforcement unit is completed; Repeat the above steps until the construction of another reinforcement unit is completed.

6. The construction method of a road culvert reinforcement system according to claim 5, characterized in that: In the process of excavating the base end of the existing culvert (1) to obtain the foundation construction space, the foundation construction space located within the range of 200-300mm above the base design elevation of the existing culvert (1) is formed by artificial excavation.

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