Construction process of buried large-span steel corrugated plate arch bridge

Abstract

The invention discloses a construction process of a concealed large-span steel corrugated plate arch bridge. The construction process comprises the following steps: (1) constructing a foundation and arch feet; (2) arch ring construction; (3) concrete pouring construction; (4) paving earthwork at the upper part of the arch ring; and (5) constructing a bridge deck pavement layer to finish the construction of the whole concealed large-span steel corrugated plate arch bridge. Construction is convenient, maintenance is easy, the arch bridge has good rigidity and toughness, the deformation resistance is high, and the special requirements of unfavorable geological conditions for the structure can be met; the tensile / compression resistance, the shear resistance and the fatigue resistance of the arch bridge are improved, the shock resistance of the structure is greatly improved, and the structure can be widely applied to the arch bridge with the span of 30-45 m.

Description

Technical Field

[0001] The invention relates to the technical field of road bridge construction, and in particular to a construction process for a concealed large-span steel corrugated plate arch bridge. Background Art

[0002] Steel corrugated plate is a new product that can be widely used in various roads and bridges. Compared with prefabricated products made of other materials, it has the advantages of small cross-section, good flexibility, light weight, easy storage and transportation, simple construction process, fast assembly, and short construction period. It can disperse stress laterally and axially in bridges and culverts, thereby better adapting to foundation deformation and facilitating its application in highway engineering.

[0003] However, steel corrugated plates are currently widely used in small and medium-sized arch bridges, and the maximum span of the applied arch bridges is about 10m. There are few studies and applications of steel corrugated plate arch bridges with a span greater than 25m. When designing a large-span steel corrugated plate arch bridge, the force aspect puts forward higher requirements on the overall structural strength of the steel corrugated plate. In order to increase the span capacity of the steel corrugated plate arch bridge, it is necessary to expand the scope of use of the steel corrugated plate and improve the bearing capacity of the arch ring. But for now, there is no good measure to meet the requirements of large-span steel corrugated plate arch bridges. Summary of the invention

[0004] In order to solve the defects in the prior art, the present invention provides a construction process for a concealed large-span steel corrugated plate arch bridge. The present invention is convenient to construct and easy to maintain, so that the arch bridge has good rigidity and toughness, strong deformation resistance, and can meet the special requirements of the structure under adverse geological conditions; it improves the tensile / compressive, shear and fatigue resistance of the arch bridge, greatly improves the seismic resistance of the structure, and can be widely used in arch bridges with a span of 30-45m.

[0005] To achieve the above object, the present invention provides a construction process for a concealed large-span steel corrugated plate arch bridge, comprising the following steps:

[0006] (1) Foundation and arch foot construction: construct the foundations on both sides of the arch bridge on the foundation, and construct the arch foot on the foundation;

[0007] (2) Arch ring construction: arched lower steel corrugated plates, multiple arched steel pipes and arched upper steel corrugated plates are installed from top to bottom between the two arch feet; the arched lower steel corrugated plates and the arched upper steel corrugated plates are interspersed with radially inclined upward anchor rods;

[0008] (3) Concrete pouring construction: pour concrete between the arched lower steel corrugated plate and the arched upper steel corrugated plate and inside the multiple arched steel pipes. After the pouring is completed and it solidifies to the designed strength, pour concrete symmetrically on both sides of the upper part of the arch ring so that the concrete on the upper part of the arch ring completely covers the arch ring and the top surface is a horizontal plane;

[0009] (4) Paving the earthwork on the upper part of the arch ring: Retaining walls are set on the upper part of the concrete poured in step (3) and on both sides of the arch bridge, and wing walls are set at both ends of the arch bridge; earthwork is filled between the retaining wall and the wing wall and compacted;

[0010] (5) Construction of bridge deck pavement: laying the bridge deck pavement on the earthwork to complete the construction of the entire concealed large-span steel corrugated plate arch bridge.

[0011] Preferably, in step (1), the foundation and the arch foot are both reinforced concrete structures, the foundation is a rectangular structure, and its length is along the transverse direction of the arch bridge; the volume of the foundation is larger than the volume of the arch foot, the length of the arch foot is the same as the length of the foundation, and the arch foot extends upward in an arc shape.

[0012] In any of the above schemes, it is preferred that in step (2), the plurality of arched steel pipes are evenly spaced apart in the transverse direction of the arch bridge, and each arched steel pipe is provided with a plurality of first grouting holes, and the arched upper steel corrugated plate is provided with a plurality of second grouting holes, wherein the positions of some of the second grouting holes correspond one-to-one to the positions of the first grouting holes.

[0013] In any of the above schemes, it is preferred that in step (2), the anchor rod is arranged through the arched lower steel corrugated plate and the arched upper steel corrugated plate, and its lower end is installed under the arched lower steel corrugated plate through a reinforcing steel plate and an anchor nut, the reinforcing steel plate is located between the arched lower steel corrugated plate and the anchor nut, and epoxy resin mortar is poured between the reinforcing steel plate and the arched lower steel corrugated plate.

[0014] In any of the above schemes, preferably, in step (2), the anchor rods are arranged in multiple columns along the longitudinal direction of the arch bridge and in multiple rows along the transverse direction of the arch bridge, all of which are arranged at equal intervals, and the anchor rods in adjacent columns are staggered.

[0015] In any of the above schemes, it is preferred that in step (3), the concrete is a lightweight vibration-free concrete, comprising the following raw materials in parts by weight: 100-150 of cement, 15-20 of microsilica powder, 50-80 of water, 260-360 of machine-made sand with a fineness modulus of 2.6-3, 380-420 of crushed stone with a particle size of 10-15 mm, 60-70 of clay aggregate, 30-50 of vesicle stone, 25-28 of organosilicon foaming agent, and 5-7 of water reducer.

[0016] In any of the above schemes, it is preferred that in step (3), the lightweight vibration-free concrete is poured in layers, and after the lower layer of lightweight vibration-free concrete hardens, an upper layer of lightweight vibration-free concrete is poured on it, and the thickness of each layer is 40-60 cm; the horizontal surface of the finally poured lightweight vibration-free concrete is 30-50 cm higher than the top of the arch ring.

[0017] In any of the above schemes, preferably, in step (4), the earth filling is carried out in layers, and the thickness of each layer is 18-25 cm; the top of the anchor rod is exposed from the top surface of the earth filling.

[0018] In any of the above schemes, it is preferred that in step (4), the outer side of the retaining wall is flush with the outermost side of the arch ring, and the retaining walls are connected by a plurality of first tensioning steel bars; the bottom of the wing wall is connected to the foundation, and the outer side is flush with the end of the foundation, and the wing walls are connected by a plurality of second tensioning steel bars; the top heights of the retaining wall and the wing wall are the same.

[0019] In any of the above schemes, it is preferred that in step (5), the bridge deck pavement layer includes a bottom layer of reinforced concrete structure, a top layer of steel fiber concrete and an asphalt concrete surface layer, and the top end of the anchor rod is fixedly connected to the steel cage laid in the bottom layer.

[0020] Beneficial effects of the present invention:

[0021] 1. The invention is convenient to construct and maintain, so that the arch bridge has good rigidity and toughness, strong deformation resistance, and can meet the special requirements of adverse geological conditions for the structure; it improves the tensile / compressive, shear and fatigue resistance of the arch bridge, greatly improves the seismic resistance of the structure, and can be widely used in arch bridges with a span of 30-45m.

[0022] 2. The present invention adopts concealed construction, and steel corrugated plates and steel pipes combined with lightweight vibration-free concrete as the arch bridge structure of the arch bridge, which are combined together to form an arch bridge as a whole to bear the top fill and vehicle loads; the construction method is simple and highly targeted; lightweight vibration-free concrete is used as the filling material, which effectively solves the problem that the top of the arch ring cannot be compacted, has better hydraulic performance, and uses less steel.

[0023] 3. In the present invention, anchor rods extending radially and obliquely upward are interspersed in the arched lower steel corrugated plate and the arched upper steel corrugated plate, and are anchored in lightweight vibration-free concrete and backfill earth and combined with the pavement layer, which greatly enhances the ability of the steel corrugated plate to resist external damage and the bearing capacity and performance of the overall structure and its ability to adapt to deformation. DETAILED DESCRIPTION

[0024] The technical solution of the present application will be described in detail below in conjunction with the specific implementation methods of the present application, but the following examples are only for understanding the present invention. The embodiments in the present application and the features in the embodiments can be combined with each other, and the present application can be implemented in a variety of different ways as defined and covered by the claims.

[0025] Example 1

[0026] A construction process for a concealed large-span steel corrugated plate arch bridge comprises the following steps:

[0027] (1) Foundation and arch foot construction: construct the foundations on both sides of the arch bridge on the foundation, and construct the arch foot on the foundation;

[0028] (2) Arch ring construction: arched lower steel corrugated plates, multiple arched steel pipes and arched upper steel corrugated plates are installed from top to bottom between the two arch feet; the arched lower steel corrugated plates and the arched upper steel corrugated plates are interspersed with radially inclined upward anchor rods;

[0029] (3) Concrete pouring construction: pour concrete between the arched lower steel corrugated plate and the arched upper steel corrugated plate and inside the multiple arched steel pipes. After the pouring is completed and it solidifies to the designed strength, pour concrete symmetrically on both sides of the upper part of the arch ring so that the concrete on the upper part of the arch ring completely covers the arch ring and the top surface is a horizontal plane;

[0030] (4) Paving the earthwork on the upper part of the arch ring: Retaining walls are set on the upper part of the concrete poured in step (3) and on both sides of the arch bridge, and wing walls are set at both ends of the arch bridge; earthwork is filled between the retaining wall and the wing wall and compacted;

[0031] (5) Construction of bridge deck pavement: laying the bridge deck pavement on the earthwork to complete the construction of the entire concealed large-span steel corrugated plate arch bridge.

[0032] In step (1), the foundation and the arch foot are both reinforced concrete structures, the foundation is a rectangular structure, and its length is along the horizontal direction of the arch bridge; the volume of the foundation is larger than the volume of the arch foot, the length of the arch foot is the same as the length of the foundation, and the arch foot extends upward in an arc shape.

[0033] In step (2), the plurality of arched steel pipes are evenly spaced apart in the transverse direction of the arch bridge, and each arched steel pipe is provided with a plurality of first grouting holes, and a plurality of second grouting holes are provided on the arched upper steel corrugated plate, wherein the positions of some of the second grouting holes correspond one-to-one to the positions of the first grouting holes.

[0034] In the step (2), the anchor rod is arranged through the arched lower steel corrugated plate and the arched upper steel corrugated plate, and the lower end of the anchor rod is installed under the arched lower steel corrugated plate through a reinforcing steel plate and an anchor nut. The reinforcing steel plate is located between the arched lower steel corrugated plate and the anchor nut, and epoxy resin mortar is poured between the reinforcing steel plate and the arched lower steel corrugated plate.

[0035] In the step (2), the anchor rods are arranged in multiple rows along the longitudinal direction of the arch bridge and in multiple rows along the transverse direction of the arch bridge, all of which are arranged at equal intervals, and the anchor rods in adjacent rows are arranged in a staggered manner.

[0036] In the step (3), the concrete is a lightweight vibration-free concrete, comprising the following raw materials in parts by weight: 150 parts of cement, 15 parts of microsilica powder, 80 parts of water, 260 parts of machine-made sand with a fineness modulus of 2.6-3, 420 parts of crushed stone with a particle size of 10-15 mm, 60 parts of clay aggregate, 50 parts of vesicle stone, 25 parts of organosilicon foaming agent, and 7 parts of water reducing agent.

[0037] In the step (3), the lightweight vibration-free concrete is poured in layers. After the lower layer of lightweight vibration-free concrete hardens, an upper layer of lightweight vibration-free concrete is poured on it. The thickness of each layer is 40 cm. The horizontal surface of the finally poured lightweight vibration-free concrete is 50 cm higher than the top of the arch ring.

[0038] In the step (4), the earth filling is carried out in layers, and the thickness of each layer is 18 cm; the top of the anchor rod is exposed from the top surface of the earth filling.

[0039] In step (4), the outer side of the retaining wall is flush with the outermost side of the arch ring, and the retaining walls are connected by a plurality of first tensioning steel bars; the bottom of the wing wall is connected to the foundation, and the outer side is flush with the end of the foundation, and the wing walls are connected by a plurality of second tensioning steel bars; the top heights of the retaining wall and the wing wall are the same.

[0040] In step (5), the bridge deck pavement layer includes a bottom layer of reinforced concrete structure, a top layer of steel fiber concrete and an asphalt concrete surface layer, and the top end of the anchor rod is fixedly connected to the steel cage laid in the bottom layer.

[0041] Example 2

[0042] A construction process for a concealed large-span steel corrugated plate arch bridge comprises the following steps:

[0043] (1) Foundation and arch foot construction: construct the foundations on both sides of the arch bridge on the foundation, and construct the arch foot on the foundation;

[0044] (2) Arch ring construction: arched lower steel corrugated plates, multiple arched steel pipes and arched upper steel corrugated plates are installed from top to bottom between the two arch feet; the arched lower steel corrugated plates and the arched upper steel corrugated plates are interspersed with radially inclined upward anchor rods;

[0045] (3) Concrete pouring construction: pour concrete between the arched lower steel corrugated plate and the arched upper steel corrugated plate and inside the multiple arched steel pipes. After the pouring is completed and it solidifies to the designed strength, pour concrete symmetrically on both sides of the upper part of the arch ring so that the concrete on the upper part of the arch ring completely covers the arch ring and the top surface is a horizontal plane;

[0046] (4) Paving the earthwork on the upper part of the arch ring: Retaining walls are set on the upper part of the concrete poured in step (3) and on both sides of the arch bridge, and wing walls are set at both ends of the arch bridge; earthwork is filled between the retaining wall and the wing wall and compacted;

[0047] (5) Construction of bridge deck pavement: laying the bridge deck pavement on the earthwork to complete the construction of the entire concealed large-span steel corrugated plate arch bridge.

[0048] In step (1), the foundation and the arch foot are both reinforced concrete structures, the foundation is a rectangular structure, and its length is along the horizontal direction of the arch bridge; the volume of the foundation is larger than the volume of the arch foot, the length of the arch foot is the same as the length of the foundation, and the arch foot extends upward in an arc shape.

[0049] In step (2), the plurality of arched steel pipes are evenly spaced apart in the transverse direction of the arch bridge, and each arched steel pipe is provided with a plurality of first grouting holes, and a plurality of second grouting holes are provided on the arched upper steel corrugated plate, wherein the positions of some of the second grouting holes correspond one-to-one to the positions of the first grouting holes.

[0050] In the step (2), the anchor rod is arranged through the arched lower steel corrugated plate and the arched upper steel corrugated plate, and the lower end of the anchor rod is installed under the arched lower steel corrugated plate through a reinforcing steel plate and an anchor nut. The reinforcing steel plate is located between the arched lower steel corrugated plate and the anchor nut, and epoxy resin mortar is poured between the reinforcing steel plate and the arched lower steel corrugated plate.

[0051] In the step (2), the anchor rods are arranged in multiple rows along the longitudinal direction of the arch bridge and in multiple rows along the transverse direction of the arch bridge, all of which are arranged at equal intervals, and the anchor rods in adjacent rows are arranged in a staggered manner.

[0052] In the step (3), the concrete is a lightweight vibration-free concrete, comprising the following raw materials in parts by weight: 100 parts cement, 20 parts microsilica powder, 50 parts water, 360 parts machine-made sand with a fineness modulus of 2.6-3, 380 parts crushed stone with a particle size of 10-15 mm, 70 parts clay aggregate, 30 parts vesicle stone, 28 parts organosilicon foaming agent, and 5 parts water reducer.

[0053] Lightweight vibration-free concrete has excellent self-compacting properties and strength. The skeleton built between the various raw materials is more solid and the concrete strength is high.

[0054] In the step (3), the lightweight vibration-free concrete is poured in layers. After the lower layer of lightweight vibration-free concrete hardens, an upper layer of lightweight vibration-free concrete is poured on it. The thickness of each layer is 60 cm. The horizontal surface of the finally poured lightweight vibration-free concrete is 30 cm higher than the top of the arch ring.

[0055] In the step (4), the earth filling is carried out in layers, and the thickness of each layer is 25 cm; the top of the anchor rod is exposed from the top surface of the earth filling.

[0056] In step (4), the outer side of the retaining wall is flush with the outermost side of the arch ring, and the retaining walls are connected by a plurality of first tensioning steel bars; the bottom of the wing wall is connected to the foundation, and the outer side is flush with the end of the foundation, and the wing walls are connected by a plurality of second tensioning steel bars; the top heights of the retaining wall and the wing wall are the same.

[0057] In step (5), the bridge deck pavement layer includes a bottom layer of reinforced concrete structure, a top layer of steel fiber concrete and an asphalt concrete surface layer, and the top end of the anchor rod is fixedly connected to the steel cage laid in the bottom layer.

[0058] In addition, in order to further improve the technical effect of the present invention, in this embodiment, the connection between the arched lower steel corrugated plate, the multiple arched steel pipes and the arched upper steel corrugated plate and the arch foot is a movable connection. Both ends of the arched lower steel corrugated plate, the multiple arched steel pipes and the arched upper steel corrugated plate are provided with oblong holes, a fixed steel plate is provided on the arch foot, and anchor holes are provided corresponding to the oblong holes. A plurality of high-strength anchor bolts pass through the anchor holes and the oblong holes to fix the arched lower steel corrugated plate, the multiple arched steel pipes and the arched upper steel corrugated plate to the arch foot. Multiple layers of wear-resistant rubber blocks are provided between the ends of the arched lower steel corrugated plate, the multiple arched steel pipes and the arched upper steel corrugated plate and the connection with the fixed steel plate.

[0059] Therefore, the connection between the arched lower steel corrugated plate, multiple arched steel pipes and the arched upper steel corrugated plate and the arch foot can realize the designed movable displacement, which can greatly meet the needs of the load and deformation borne by the arch bridge and has strong adaptability to large displacement of the foundation.

[0060] Example 3

[0061] A construction process for a concealed large-span steel corrugated plate arch bridge comprises the following steps:

[0062] (1) Foundation and arch foot construction: construct the foundations on both sides of the arch bridge on the foundation, and construct the arch foot on the foundation;

[0063] (2) Arch ring construction: The arched lower steel corrugated plate, multiple arched steel pipes and the arched upper steel corrugated plate are installed from top to bottom between the two arch feet; the arched lower steel corrugated plate and the arched upper steel corrugated plate are interspersed with radially inclined upward anchor rods; such an arch ring structure also avoids the construction method of using multiple pieces of steel corrugated plates spliced ​​together in the prior art, so that the arched lower steel corrugated plate and the arched upper steel corrugated plate can be used as a whole, which greatly enhances the stability and overall strength of the large-diameter arch bridge.

[0064] (3) Concrete pouring construction: pour concrete between the arched lower steel corrugated plate and the arched upper steel corrugated plate and inside the multiple arched steel pipes. After the pouring is completed and it solidifies to the designed strength, pour concrete symmetrically on both sides of the upper part of the arch ring so that the concrete on the upper part of the arch ring completely covers the arch ring and the top surface is a horizontal plane;

[0065] (4) Paving the earthwork on the upper part of the arch ring: Retaining walls are set on the upper part of the concrete poured in step (3) and on both sides of the arch bridge, and wing walls are set at both ends of the arch bridge; earthwork is filled between the retaining wall and the wing wall and compacted;

[0066] (5) Construction of bridge deck pavement: laying the bridge deck pavement on the earthwork to complete the construction of the entire concealed large-span steel corrugated plate arch bridge.

[0067] In step (1), the foundation and the arch foot are both reinforced concrete structures, the foundation is a rectangular structure, and its length is along the horizontal direction of the arch bridge; the volume of the foundation is larger than the volume of the arch foot, the length of the arch foot is the same as the length of the foundation, and the arch foot extends upward in an arc shape.

[0068] In step (2), the plurality of arched steel pipes are evenly spaced apart in the transverse direction of the arch bridge, and each arched steel pipe is provided with a plurality of first grouting holes, and a plurality of second grouting holes are provided on the arched upper steel corrugated plate, wherein the positions of some of the second grouting holes correspond one-to-one to the positions of the first grouting holes.

[0069] In the step (2), the anchor rod is arranged through the arched lower steel corrugated plate and the arched upper steel corrugated plate, and the lower end of the anchor rod is installed under the arched lower steel corrugated plate through a reinforcing steel plate and an anchor nut. The reinforcing steel plate is located between the arched lower steel corrugated plate and the anchor nut, and epoxy resin mortar is poured between the reinforcing steel plate and the arched lower steel corrugated plate.

[0070] In the step (2), the anchor rods are arranged in multiple rows along the longitudinal direction of the arch bridge and in multiple rows along the transverse direction of the arch bridge, all of which are arranged at equal intervals, and the anchor rods in adjacent rows are arranged in a staggered manner.

[0071] In the step (3), the concrete is a lightweight vibration-free concrete, comprising the following raw materials in parts by weight: 120 parts of cement, 18 parts of microsilica powder, 60 parts of water, 300 parts of machine-made sand with a fineness modulus of 2.6-3, 400 parts of crushed stone with a particle size of 10-15 mm, 65 parts of clay aggregate, 40 parts of vesicle stone, 26 parts of organosilicon foaming agent, and 6 parts of water reducer.

[0072] The light-weight, vibration-free concrete in this embodiment has a slump of 280 mm and an expansion of 680 mm. After 2.5 hours, the slump and expansion losses are 10 mm and 9 mm, respectively, which can effectively avoid segregation and stratification. The shrinkage rate at 120 days is 1×10 -4The crack resistance grade is V, and it has excellent self-compacting and crack resistance performance, which can improve the construction speed and quality of concrete and meet the design quality requirements.

[0073] In the step (3), the lightweight vibration-free concrete is poured in layers. After the lower layer of lightweight vibration-free concrete hardens, an upper layer of lightweight vibration-free concrete is poured on it. The thickness of each layer is 50 cm. The horizontal surface of the finally poured lightweight vibration-free concrete is 40 cm higher than the top of the arch ring.

[0074] In the step (4), the earth filling is carried out in layers, and the thickness of each layer is 22 cm; the top of the anchor rod is exposed from the top surface of the earth filling.

[0075] In step (4), the outer side of the retaining wall is flush with the outermost side of the arch ring, and the retaining walls are connected by a plurality of first tensioning steel bars; the bottom of the wing wall is connected to the foundation, and the outer side is flush with the end of the foundation, and the wing walls are connected by a plurality of second tensioning steel bars; the top heights of the retaining wall and the wing wall are the same.

[0076] In step (5), the bridge deck pavement layer includes a bottom layer of reinforced concrete structure, a top layer of steel fiber concrete and an asphalt concrete surface layer, and the top end of the anchor rod is fixedly connected to the steel cage laid in the bottom layer.

[0077] In addition, in order to further improve the technical effect of the present invention, in the embodiment, in the step (3), a 8-10 cm gravel layer covered by geogrid can be first filled from the arch foot on both sides of the upper part of the arch ring, and the total height of the gravel layer is 40-50 cm, and 2-3 layers of geogrid can be laid. Then, lightweight vibration-free concrete is poured symmetrically, so that the concrete on the upper part of the arch ring completely covers the arch ring and the top surface is a horizontal surface.

[0078] In this implementation, a gravel layer covered with geogrid is first laid and then concrete is poured, which does not affect the bearing capacity of the arch ring and the upper structure, while reducing the pressure load on the steel corrugated plate arch structure. The formed flexible structure also disperses the pressure brought by the upper structure, and improves the span and bearing capacity of the arch bridge under the condition of the same thickness and strength of the steel corrugated plate. The gravel layer structure and the steel corrugated plate arch structure deform synergistically, further ensuring the possibility of a large span.

[0079] The construction of this embodiment saves time and effort, greatly reduces costs, and ensures project quality.

[0080] It can be seen from the above embodiments that the present invention is easy to construct and maintain, so that the arch bridge has good rigidity and toughness, strong deformation resistance, and can meet the special requirements of adverse geological conditions for the structure; the arch bridge has improved tensile / compressive, shear and fatigue resistance, greatly improved the seismic resistance of the structure, and can be widely used in arch bridges with a span of 30-45m.

[0081] The present invention adopts concealed construction, and steel corrugated plates and steel pipes combined with lightweight vibration-free concrete as the arch bridge structure of the arch bridge, which are combined together to form an arch bridge as a whole to bear the top fill and vehicle loads; the construction method is simple and highly targeted; lightweight vibration-free concrete is used as the filling material, which effectively solves the problem that the top of the arch ring cannot be compacted, has better hydraulic performance, and uses less steel.

[0082] The present invention has anchor rods interspersed in the arched lower steel corrugated plate and the arched upper steel corrugated plate along the radial direction and obliquely upward, and is anchored in lightweight vibration-free concrete and backfill earth and combined with the pavement layer, which greatly enhances the ability of the steel corrugated plate to resist external damage and the bearing capacity and performance of the overall structure and the ability to adapt to deformation.

[0083] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A construction process for a concealed large-span steel corrugated plate arch bridge, characterized in that: The following steps are involved: (1) Foundation and arch foot construction: construct the foundations on both sides of the arch bridge on the foundation, and construct the arch foot on the foundation; (2) Arch ring construction: arched lower steel corrugated plates, multiple arched steel pipes and arched upper steel corrugated plates are installed from top to bottom between the two arch feet; the arched lower steel corrugated plates and the arched upper steel corrugated plates are interspersed with radially inclined upward anchor rods; (3) Concrete pouring construction: pour concrete between the arched lower steel corrugated plate and the arched upper steel corrugated plate and inside the multiple arched steel pipes. After the pouring is completed and it solidifies to the designed strength, pour concrete symmetrically on both sides of the upper part of the arch ring so that the concrete on the upper part of the arch ring completely covers the arch ring and the top surface is a horizontal plane; (4) Paving the earthwork on the upper part of the arch ring: Retaining walls are set on the upper part of the concrete poured in step (3) and on both sides of the arch bridge, and wing walls are set at both ends of the arch bridge; earthwork is filled between the retaining wall and the wing wall and compacted; (5) Construction of bridge deck pavement: laying the bridge deck pavement on the earthwork to complete the construction of the entire concealed large-span steel corrugated plate arch bridge.

2. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 1 is characterized in that: In step (1), the foundation and the arch foot are both reinforced concrete structures, the foundation is a rectangular structure, and its length is along the horizontal direction of the arch bridge; the volume of the foundation is larger than the volume of the arch foot, the length of the arch foot is the same as the length of the foundation, and the arch foot extends upward in an arc shape.

3. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 1 or 2, characterized in that: In step (2), the plurality of arched steel pipes are evenly spaced apart in the transverse direction of the arch bridge, and each arched steel pipe is provided with a plurality of first grouting holes, and a plurality of second grouting holes are provided on the arched upper steel corrugated plate, wherein the positions of some of the second grouting holes correspond one-to-one to the positions of the first grouting holes.

4. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 3 is characterized in that: In the step (2), the anchor rod is arranged through the arched lower steel corrugated plate and the arched upper steel corrugated plate, and the lower end of the anchor rod is installed under the arched lower steel corrugated plate through a reinforcing steel plate and an anchor nut. The reinforcing steel plate is located between the arched lower steel corrugated plate and the anchor nut, and epoxy resin mortar is poured between the reinforcing steel plate and the arched lower steel corrugated plate.

5. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 4 is characterized in that: In the step (2), the anchor rods are arranged in multiple rows along the longitudinal direction of the arch bridge and in multiple rows along the transverse direction of the arch bridge, all of which are arranged at equal intervals, and the anchor rods in adjacent rows are arranged in a staggered manner.

6. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 4 or 5, characterized in that: In the step (3), the concrete is a lightweight vibration-free concrete, comprising the following raw materials in parts by weight: 100-150 parts of cement, 15-20 parts of microsilica powder, 50-80 parts of water, 260-360 parts of machine-made sand with a fineness modulus of 2.6-3, 380-420 parts of crushed stone with a particle size of 10-15 mm, 60-70 parts of clay ceramsite, 30-50 parts of vesicle stone, 25-28 parts of organosilicon foaming agent, and 5-7 parts of water reducer.

7. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 6 is characterized in that: In the step (3), the lightweight vibration-free concrete is poured in layers. After the lower layer of lightweight vibration-free concrete hardens, an upper layer of lightweight vibration-free concrete is poured on it. The thickness of each layer is 40-60 cm. The horizontal surface of the finally poured lightweight vibration-free concrete is 30-50 cm higher than the top of the arch ring.

8. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 7 is characterized in that: In the step (4), the earth filling is carried out in layers, and the thickness of each layer is 18-25 cm; the top of the anchor rod is exposed from the top surface of the earth filling.

9. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 7 or 8, characterized in that: In step (4), the outer side of the retaining wall is flush with the outermost side of the arch ring, and the retaining walls are connected by a plurality of first tensioning steel bars; the bottom of the wing wall is connected to the foundation, and the outer side is flush with the end of the foundation, and the wing walls are connected by a plurality of second tensioning steel bars; the top heights of the retaining wall and the wing wall are the same.

10. The construction process of the concealed large-span steel corrugated plate arch bridge according to claim 9 is characterized in that: In step (5), the bridge deck pavement layer includes a bottom layer of reinforced concrete structure, a top layer of steel fiber concrete and an asphalt concrete surface layer, and the top end of the anchor rod is fixedly connected to the steel cage laid in the bottom layer.