CN113957789A - Pile type steel structure bridge roadbed pavement and construction method thereof - Google Patents

Abstract

The invention relates to the technical field of bridge construction, in particular to a pile type steel structure bridge roadbed pavement and a construction method thereof, wherein the pile type steel structure bridge roadbed pavement comprises pile type piers, a bridge box body and a bridge deck cushion frame; after the steel structure bridge runs for a long time, deformation among structural members of the steel structure bridge can be transmitted to the position of the expansion joint for buffering, and the influence on stress change of a bridge deck is caused when a vehicle passes through the steel structure bridge, so that a thicker road base layer needs to be laid on the steel structure bridge to balance stress effect on the bridge structure, and the self weight and the construction time of the bridge structure are increased; therefore, the invention improves the load performance of the roadbed through the wave-shaped backing plate by the backing plate and the steel wire mesh arranged in the bridge deck backing frame, and leads the sand paved in the roadbed material to contact the surface of the bridge box body, thereby enhancing the force transmission effect of the roadbed to the bridge box body, reducing the self weight of the bridge under the condition of meeting the highway operation requirement, and further improving the applicability of the pile column type steel structure bridge roadbed pavement construction.

Description

Pile type steel structure bridge roadbed pavement and construction method thereof

Technical Field

The invention relates to the technical field of bridge construction, in particular to a pile type steel structure bridge roadbed pavement and a construction method thereof.

Background

The steel structure bridge is mainly by the steel material as important structures such as column beam, also be one of highway bridge engineering structure commonly used simultaneously, use welding according to the demand of difference, construction technology such as bolt constitutes different components, the texture of steel construction self is comparatively even, high strength, the characteristics that dead weight is light and plasticity is good, the steel construction is compared materials such as concrete, bear the impact of same pressure, have more excellent stability, and it is more convenient in material transportation and bridge construction process, wherein pile formula pier is a pier structure and goes deep into the underground as the basis, pier and the same special construction of pile foundation cross-section, do not include the cushion cap that the cost is expensive in the pile formula steel structure bridge, obtained wide application in bridge engineering.

Steel construction bridge is after long-time operation, receives the stress effect of environment and bridge floor formation, and the position at expansion joint can be transmitted to in deformation between its structure piece cushions to cause the destruction at expansion joint, influence the road surface quality of highway bridge and the trafficability characteristic of driving then, the influence to bridge floor stress change when driving the vehicle simultaneously and passing through, need lay thick road bed portion on steel construction bridge and come the equilibrium to the stress effect of bridge structures, increased the dead weight and the engineering time of bridge structures.

If a Chinese patent with application number CN201910685096.2 discloses an assembled steel structure concrete composite bridge and a construction method thereof, relating to the technical field of bridge construction, the assembled steel structure concrete composite bridge comprises a concrete pier and a steel frame girder, wherein the side walls of both sides of the concrete pier are respectively provided with a placing groove, the steel frame girder comprises a steel girder support, a steel girder support and a steel girder plate, the bottom of the placing groove is connected with an elastic block, and the elastic block is connected with the steel girder support; the lower surfaces of two steel beam plates on the same concrete pier are respectively provided with a male insertion plate and a female insertion plate, the female insertion plates are in insertion fit with the male insertion plates, the short edges of the female insertion plates and the male insertion plates are connected with elastic pieces, and the elastic pieces extend between the two steel beam plates and are connected with one sides of the two steel beam plates opposite to each other; according to the technical scheme, the male insertion plate, the female insertion plate, the elastic piece and the elastic block are arranged, so that the damage probability between adjacent steel frame girders and between the steel frame girders and a concrete pier is reduced, the integral structure of the bridge is stable, and the damage probability is greatly reduced in an earthquake or under the condition of large vibration; but not solve steel structure bridge among this technical scheme for keeping the driving effect, the thickness of laying the road bed road surface is great and causes the bridge floor weight to increase in the construction, has weakened the advantage of the light weight of steel structure bridge then, has restricted steel structure bridge's suitability.

In view of the above, the invention provides a pile type steel structure bridge roadbed pavement and a construction method thereof, which solve the technical problems.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides a pile type steel structure bridge roadbed pavement and a construction method thereof.

The invention relates to a pile column type steel structure bridge roadbed pavement, which comprises pile column type piers, a bridge box body and a bridge deck pad frame; the pile column type bridge pier is built in a pile hole excavated on the ground, and the top of the pile column type bridge pier is used for bearing a bridge box body; the end part of the bridge box body is erected on the pile pier, a bridge deck pad frame is arranged above the bridge box body, and an expansion joint is further arranged between the bridge deck pad frame and the beam end of the bridge box body; the bridge deck pad frame is used for embedding gravels as a road base layer, and concrete is poured above the road base layer to serve as a road surface layer;

the upper part of the pile pier is a cage body with a steel structure, and the cage body is poured with concrete in a pile hole on the ground; two joists are welded and fixed at the top end of the cage body, the joists are perpendicular to the length direction of the bridge box body, two ends of each joists are bent upwards, and the length of each joists is greater than the width of the bottom surface of the bridge box body;

the bottom surface of the end part of the bridge box body is also provided with an end plate, and the bridge box body is arranged behind the pile pier; the end plate is positioned between the two joists at the top of the cage body, a through hole is also formed in the end plate, and a locking bolt is arranged in the through hole; the bolts are connected to the end plates of the adjacent bridge box bodies;

the bridge deck pad frame is of a frame structure and is welded and fixed on the bridge box body, the bottom of the bridge deck pad frame is provided with a wavy pad plate, the pad plates are distributed along the length direction of the bridge box body, and steel wire meshes are welded and fixed among the pad plates and used for intercepting stones in roadbed materials; the bridge deck pad frame is also provided with through holes at two sides of the bridge box body;

in the prior art, after a steel structure bridge runs for a long time, under the stress action formed by the environment and a bridge deck, deformation among structural members of the steel structure bridge can be transmitted to the position of an expansion joint for buffering, the expansion joint is damaged, the pavement quality of a highway bridge and the trafficability of a travelling crane are further influenced, meanwhile, the influence on the stress change of the bridge deck when the travelling crane passes through is needed, a thicker road base layer is laid on the steel structure bridge to balance the stress effect on the bridge structure, and the self weight and the construction time of the bridge structure are increased;

therefore, the invention fixes the bridge deck cushion frame on the bridge box body in a welding way through the arranged bridge deck cushion frame, when the bridge roadbed pavement is constructed, sand stones paved on roadbed materials are separated by the steel wire mesh, wherein the sand with smaller particle size passes through the steel wire mesh and enters the bridge box body at the bottom of the cushion plate, larger stones are intercepted in the cushion plate space above the steel wire mesh, so that only the sand is stored below the steel wire mesh of the roadbed layer, and the mixed sand stones are stored above the steel wire mesh, so that the bottom of the roadbed layer is contacted with the bridge box body through the sand, the supporting effect of the dense sand grains on the wavy cushion plate is ensured, the cushion plate is prevented from being extruded by the upper and lower side stones to deform, partial stress change born by the roadbed is buffered through the micro deformation of the wavy cushion plate under stress, meanwhile, the thickness of the roadbed layer on the bridge is also reduced, and the through holes on the bridge deck cushion frame are used for matching with the wavy cushion plate, the method comprises the following steps of enabling atmosphere with changing environmental temperature to transfer heat to contact sand gaps through holes, enabling a roadbed to generate micro deformation with the same trend along with a bridge box body of a steel structure, ensuring the fixed state of the roadbed on the bridge box body of the steel structure, clamping an end plate of the bridge box body into a supporting beam at the top of a pier in the process of constructing the steel structure bridge, completing the positioning of the bridge box body, then installing a locking nut into a through hole of the end plate, correcting the position state of an adjacent bridge box body on a pile column type pier through the locking nut, then laying expansion joints between the bridge box bodies on a roadbed, and finally constructing a concrete pavement; the invention utilizes the backing plate and the steel wire mesh arranged in the bridge deck backing frame to improve the load performance of the roadbed through the wavy backing plate, and leads the sand paved in the roadbed material to contact the surface of the bridge box body, thereby enhancing the force transmission effect of the roadbed to the bridge box body, reducing the self weight of the bridge under the condition of meeting the running requirement of the highway, and further improving the applicability of the pile column type steel structure bridge roadbed pavement construction.

Preferably, the cage body is also provided with an inclined strut on the concrete pile at the ground part, and the inclined strut extends into a soil layer on the ground; the bottom of the inclined strut is provided with a sleeved strut cylinder, and the bottom end of the strut cylinder is provided with a surrounding wedge groove; a sleeved lining cylinder is arranged between the support cylinder and the inclined support, the lining cylinder protrudes out of two ends of the support cylinder, and the bottom of the lining cylinder is provided with a conical head, and the conical head is larger than the diameter of the support cylinder; threads meshed with the inclined strut and the support cylinder are respectively arranged on the inner wall and the outer wall of the liner cylinder, the liner cylinder rises along the inclined strut by rotating, and the support cylinder descends along the inclined strut, so that the conical head of the liner cylinder supports the bottom of the support cylinder; during operation, the pile foundation of the pile type pier in the ground is mostly longer than the pier length exposed out of the ground, so that the maximum bending moment of the section of the pile type pier is below the ground, and the stability of the pile type pier can be interfered by the transverse movement of a ground soil layer; through setting up the bracing on the pier cage body, make it stretch into in the ground soil layer, the setting is in the wedge groove that props a barrel bottom encircleing, the section of thick bamboo expansion process that props under the conical head effect has been promoted, the meshing screw thread of setting between a lining section of thick bamboo and bracing, be convenient for control the distance that a lining section of thick bamboo promoted on the bracing, the conical head that makes its bottom through rotatory lining section of thick bamboo makes the bottom of a section of thick bamboo will prop a section of thick bamboo and extrude, the bottom that makes to prop a section of thick bamboo opens in the soil layer, simultaneously at the in-process that props a section of thick bamboo expansion, the soil to its contact has played the compaction effect, make the bracing compare in the cage body and formed the effect of anchoring, and then stabilized the gesture of bracing, the stability of pier cage body has been strengthened, and the section of thick bamboo bottom that props of expanding has still increased the hindrance to soil layer lateral shifting, the stability of stake pier region soil layer has been increased, thereby the geological environment that stake formula bridge construction is suitable for has been promoted.

Preferably, the bottom surface of the bridge box body is also provided with an arc-shaped convex ridge, and the convex ridge is positioned at the end part of the bridge box body; the joist is also provided with an arc-shaped concave surface; the bridge box body is carried in the concave surface of the joist through the convex ridge; a columnar adhesive tape is arranged between the convex ridge and the joist and is parallel to the length direction of the bridge box body; when the bridge box works, the bridge box body can shake and displace under the influence of vehicle passing and environmental wind on the bridge floor; through setting up curved ridge on the bridge box, make the displacement that the bridge box rocked the back on the pier and produce restore to the concave surface central point of joist along the cambered surface of ridge under the action of gravity and put, the column adhesive tape of setting follows up with moving at the displacement in-process of bridge box, the collision that produces when sliding between bridge box and joist has been avoided, make the bridge box play the cushioning effect to the weight of joist, and when pile column pier is installed to the bridge box, the trace that utilizes the ridge to produce on the joist slides and to fix a position the central point of joist to the focus of bridge box, and then the planarization on road bed road surface on the bridge box has been maintained, and the installation operation of bridge box in the construction has been optimized, thereby the construction effect of pile column steel construction bridge has been promoted.

Preferably, upright guardrails are further arranged on two sides of the bridge deck pad frame, and openings are further formed in the guardrails towards the inner side of the bridge deck pad frame; the opening is also provided with a fixedly connected air pipe inside the guardrail, and the air pipe is communicated into the through hole of the bridge pad frame; the during operation, the guardrail of bridge both sides is arranged in protecting the vehicle out of control and turns over the bridge floor, through setting up the opening on the guardrail outside, the messenger blows to the environment wind of bridge and enters into the through hole along the opening on the railing, and in the through hole of air pipe flow direction bridge pad frame, the opening on the through hole of bridge pad frame and the guardrail is set up, the environment wind that makes bridge both sides direction produce can both blow in the road bed layer of bridge pad frame, and the intercommunication has formed the wind path between through hole and tuber pipe, air current to in the environment leads formation heat convection effect, be convenient for carry out heat-conduction with the material of road bed layer, the effect of road bed layer along with the temperature change has been strengthened, thereby the operational effect of stake formula bridge roadbed road surface has been promoted.

Preferably, the top of the inclined strut is also provided with a limiting plate, the limiting plate is fixed in concrete poured at the bottom of the cage body, and the surface of the limiting plate is provided with a limiting hole; the top of the inclined strut is arranged in the limiting hole through a fastener; the during operation, the bracing will prop the displacement that the section of thick bamboo bottom propped the in-process and produce imbedding the soil layer, install the top of bracing in the different spacing holes on the limiting plate through the fastener, change the position of bracing top on the limiting plate, make the bracing support the cage with the state of stabilizing in ground soil layer, and fix the limiting plate in the concrete structure that the cage bottom was filled, make stake formula pier with the effort transmission of bracing to the concrete structure that fills in the ground stake hole, the steel construction of avoiding the strong point of bracing effort to transmit on the cage produces uneven moment of flexure, thereby the operation effect on stake formula steel construction bridge road bed road surface has been promoted.

Preferably, the limiting plate is further provided with an arc-shaped plastic beam; one end of the plastic beam is welded and fixed on the limiting plate, the other end of the plastic beam is provided with a fixedly connected support column, and the bottom of the support column is provided with a cross plate and is embedded into a soil layer on the ground; during operation, through will propping the post and imbed in the ground soil layer of stake column type pier circumference, the cross plate of support post bottom for firm the regional soil layer of stake column type pier, and produce the lateral displacement back in ground soil layer, enlarge the effort to propping the post through the cross-section of cross plate in the soil layer, make to prop the post and increased the radian that the plasticity roof beam was bent, change the gesture of stake column type pier through propping the post in order to avoid the micro lateral displacement of soil layer, thereby maintained the operational effect of stake column type steel construction bridge.

The invention relates to a pile type steel structure bridge roadbed pavement construction method, which is suitable for the pile type steel structure bridge roadbed pavement, and comprises the following steps:

s1, excavating a foundation pit at a position calibrated in a construction drawing, controlling the position precision and the verticality of the foundation pit to meet technical requirements, then embedding a pile casing in the foundation pit, drilling and forming a pile hole by using construction equipment, pouring slurry into the pile hole, brushing the wall and cleaning the bottom after the pile hole is formed, so as to prepare for hoisting a cage body of the pile-column pier into the pile hole;

s2, in the hoisting process of the cage body of the pile pier, controlling the speed of lowering the reinforcement cage into the pile hole to be maintained at 0.8-1.8m/min, heating by using a gas cutting gun in the process of sinking the reinforcement cage into the pile hole, immediately installing a conduit for pouring concrete to pour the underwater concrete after the reinforcement cage sinks in the pile hole, pumping out the slurry in the pile hole and lifting the height of the conduit in the pouring process;

s3, during 48h after pouring of concrete in the pile hole S2, supporting the inclined support into a soil layer in the circumferential direction of the pile-column-type pier, connecting the inclined support to the top of a poured concrete pile through a limiting plate, then installing the bridge box body, enabling an end plate of the bridge box body to be placed between two joists at the top end of the cage body, enabling convex ridges of the bridge box body to be lapped on concave surfaces of the joists, then installing bolts on through holes of the end plate, and connecting adjacent bridge box bodies together;

s4, before the bridge box body in the S3 is installed, paving a bridge deck pad frame, placing a wavy pad in the bridge deck pad frame in the length direction of the bridge box body, adding sand of a path material into the wavy pad, adding stones into a roadbed material after the height of the sand reaches a steel wire mesh in the bridge deck pad frame, enabling the sand-stone ratio above the steel wire mesh to be within the range of 1:1.3-1:1.5, and pouring a pavement layer after paving a roadbed layer;

s5, after paving the road base layer in the S4, binding reinforcing steel bars of guardrails on two sides of the bridge deck pad frame, installing guardrail templates, and then embedding plastic pipelines as through holes in the formed bridge deck pad frame and air pipes in guardrails of the bridge in the process of pouring concrete at guardrail positions;

and S6, after the pouring of the pavement layer in the S4 is finished, forming a groove for installing the expansion joint in the pavement layer at the end part of the adjacent bridge box body, then installing the bridge box body in the S, and completing the installation of the expansion joint before locking the bolts installed on the end plates.

Preferably, before the gravel material of the road base layer is paved on a bridge box body, the treatment steps are as follows:

I. firstly, separating sand from a roadbed layer material through a screen, putting the separated sand on an oven plate, heating to 140-180 ℃ for more than 40min, putting the separated stone on the oven plate, heating to 90-130 ℃ for more than 20min, and then paving the heated sand in a bridge deck cushion frame on a bridge box body until the sand reaches a steel wire mesh of the bridge deck cushion frame;

II. And (3) after the sand in the I is paved, continuously paving a sand layer of 1.5-2.5cm above the steel wire mesh, uniformly paving stones in the roadbed material on the sand layer, controlling the thickness of the stone layer to be 4-5cm, supplementing sand among gaps of the stones to enable the sand layer to permeate the stone layer by 1-2cm, measuring the temperature of the sand in the roadbed layer by a thermometer, reducing the temperature to 20-30 ℃, and then pouring the concrete pavement layer.

Preferably, the gravel material of the road base layer is directly paved in a bridge deck pad frame of the bridge box body after being heated, then the subsequent road surface layer is poured, and the pavement of the road bed and the road surface is completed before the bridge box body is installed on the pile pier; through directly laying the grit material of heating on the bridge box, make the temperature conduction of grit to the bridge box and during the member of bridge floor pad frame to reduce the difference in temperature between steel construction bridge floor and the road bed layer, then at the in-process of pouring road surface layer concrete, make the bridge member be in the cooling process of the same trend along with the concrete, ensure fashioned road bed road surface quality on the bridge box.

Preferably, before the concrete of the road surface layer is poured into a road base layer of the bridge deck pad frame, atomized water drops are sprayed onto the gravel material, and the gravel material is blown into through holes of the bridge deck pad frame by a blower; the influence of the heat of the gravel material in the roadbed layer on the concrete solidification process is reduced through the sprayed water drops, and the air flow in the through holes is blown by the air blower, so that the heat convection effect in the concrete solidification process is promoted, the evaporation effect of the water drops attached to the surfaces of the gravel is enhanced, the temperature rise of the concrete in the solidification process is further reduced, and the construction effect of the steel structure bridge roadbed pavement is ensured.

The invention has the following beneficial effects:

1. according to the invention, through the cushion plate and the steel wire mesh arranged in the bridge deck cushion frame, the load performance of the roadbed is improved through the wavy cushion plate, sand paved in roadbed materials is contacted with the surface of the bridge box body, the force transmission effect of the roadbed to the bridge box body is enhanced, the self weight of the bridge is reduced under the condition of meeting the highway operation requirement, and thus the applicability of the pile column type steel structure bridge roadbed pavement construction is improved.

2. According to the invention, the heated gravel material is directly paved on the bridge box body, so that the temperature of the gravel is conducted to the bridge box body and the bridge deck cushion frame, the temperature difference between the steel structure bridge deck and the roadbed is reduced, and the air flow blown to the through holes by the air blower promotes the heat convection effect in the concrete solidification process, enhances the evaporation effect of water drops attached to the surface of the gravel, reduces the temperature rise of the concrete in the solidification process, and ensures the construction effect of the steel structure bridge roadbed and the pavement.

Drawings

The invention is further described with reference to the following figures and embodiments.

FIG. 1 is a flow chart of a construction method of a pile type steel structure bridge roadbed pavement;

FIG. 2 is a flow chart of the present invention for treating the sand material of the roadbed layer before paving;

FIG. 3 is a perspective view of a bridge deck frame assembly according to the present invention;

FIG. 4 is a perspective view of a top view of a roadbed and a pavement of the pile-column type steel structure bridge;

FIG. 5 is a perspective view of the roadbed and pavement of the pile-column type steel structure bridge according to the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 3 at A;

FIG. 7 is a partial enlarged view at B in FIG. 4;

FIG. 8 is an enlarged view of a portion of FIG. 4 at C;

FIG. 9 is an enlarged view of a portion of FIG. 5 at D;

in the figure: the pile pier comprises a pile pier 1, a cage body 11, a joist 12, a concave surface 121, a bridge box body 2, an end plate 21, a through hole 22, a bolt 23, a bridge deck pad frame 3, a pad plate 31, a steel wire mesh 32, a through hole 33, a guardrail 34, an opening 341, an air pipe 342, an expansion joint 4, an inclined strut 5, a strut 51, a wedge groove 52, a lining 53, a conical head 54, a thread 55, a convex ridge 6, an adhesive tape 61, a limiting plate 7, a limiting hole 71, a plastic beam 72, a strut 73 and a cross plate 74.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 9, the pile-column type steel structure bridge subgrade pavement of the invention comprises pile-column type piers 1, a bridge box body 2 and a bridge deck frame 3; the pile pier 1 is built in a pile hole excavated on the ground, and the top of the pile pier 1 is used for bearing a bridge box body 2; the end part of the bridge box body 2 is lapped on the pile pier 1, a bridge deck pad frame 3 is arranged above the bridge box body 2, and an expansion joint 4 is also arranged between the bridge ends of the bridge box body 2 on the bridge deck pad frame 3; the bridge deck pad frame 3 is used for embedding gravels as a road base layer, and concrete is poured above the road base layer as a road surface layer;

the upper part of the pile pier 1 is a steel cage 11, and the cage 11 is poured with concrete in a pile hole on the ground; two joists 12 are welded and fixed at the top end of the cage body 11, the joists 12 are perpendicular to the length direction of the bridge box body 2, two ends of the joists 12 are bent upwards, and the length of the joists 12 is greater than the width of the bottom surface of the bridge box body 2;

the bottom surface of the end part of the bridge box body 2 is also provided with an end plate 21, and the bridge box body 2 is installed behind the pile pier 1; the end plate 21 is positioned between the two joists 12 at the top of the cage body 11, the end plate 21 is also provided with a through hole 22, and a locking bolt 23 is arranged in the through hole 22; the bolts 23 are connected to the end plates 21 of the adjacent bridge box bodies 2;

the bridge deck pad frame 3 is welded and fixed on the bridge box body 2 in a frame structure, the bottom of the bridge deck pad frame 3 is provided with wave-shaped pad plates 31, the pad plates 31 are distributed along the length direction of the bridge box body 2, steel wire meshes 32 are further welded and fixed among the pad plates 31, and the steel wire meshes 32 are used for intercepting stones in roadbed materials; the bridge deck pad frame 3 is also provided with through holes 33 at two sides of the bridge box body 2;

in the prior art, after a steel structure bridge runs for a long time, under the stress action formed by the environment and a bridge deck, deformation among structural members of the steel structure bridge can be transmitted to the position of an expansion joint 4 for buffering, and the expansion joint 4 is damaged, so that the pavement quality of the highway bridge and the trafficability of a travelling crane are influenced, meanwhile, when the travelling crane passes through, the influence on the stress change of the bridge deck is influenced, a thicker road base layer needs to be laid on the steel structure bridge to balance the stress effect on the bridge structure, and the self weight and the construction time of the bridge structure are increased;

therefore, the bridge deck frame 3 is welded and fixed on the bridge box body 2, when the bridge roadbed and pavement construction is carried out, sand and stones in paving roadbed materials are separated by the steel wire mesh 32, wherein the sand with smaller particle size passes through the steel wire mesh 32 and enters the bridge box body 2 at the bottom of the backing plate 31, larger stones are intercepted in the space of the backing plate 31 above the steel wire mesh 32, the roadbed layer only contains the sand below the steel wire mesh 32, the mixed sand and stones are stored above the steel wire mesh 32, the bottom of the roadbed layer is contacted with the bridge box body 2 through the sand, the supporting effect of the dense sand grains on the wavy backing plate 31 is ensured, the backing plate 31 is prevented from being extruded by the upper and lower side stones to deform, partial stress change borne by the roadbed is buffered through micro deformation of the wavy backing plate 31 under stress, and the thickness of the roadbed layer on the bridge is reduced, the through holes 33 on the bridge cushion frame are used for matching with the waved cushion plates 31, so that the atmosphere with the change of the environmental temperature conducts heat to the contacted sand gaps through the through holes 33, the roadbed layer generates micro deformation with the same trend along with the bridge box bodies 2 of the steel structure, the fixed state of the roadbed layer on the bridge box bodies 2 of the steel structure is ensured, in the process of constructing the steel structure bridge, the end plates 21 of the bridge box bodies 2 are clamped between the joists 12 at the tops of the piers to complete the positioning of the bridge box bodies 2, then the locking nuts are installed in the through holes 22 of the end plates 21, the position states of the adjacent bridge box bodies 2 on the pile pier 1 are corrected through the locking nuts, then the expansion joints 4 between the bridge box bodies 2 are laid on a roadbed, and finally the construction of a concrete pavement is carried out; the invention utilizes the backing plate 31 and the steel wire mesh 32 arranged in the bridge deck backing frame 3, improves the load performance of the roadbed through the wavy backing plate 31, enables the sand paved in the roadbed material to contact the surface of the bridge box body 2, enhances the force transmission effect of the roadbed on the bridge box body 2, reduces the self weight of the bridge under the condition of meeting the highway operation requirement, and improves the applicability of the pile column type steel structure bridge roadbed and road construction.

As an embodiment of the invention, the cage body 11 is further provided with an inclined strut 5 on the concrete pile at the ground part, and the inclined strut 5 extends into the soil layer of the ground; the bottom of the inclined strut 5 is provided with a sleeved strut cylinder 51, and the bottom end of the strut cylinder 51 is provided with a surrounding wedge groove 52; a sleeved lining tube 53 is further arranged between the support tube 51 and the inclined support 5, the lining tube 53 protrudes out of two ends of the support tube 51, a conical head 54 is arranged at the bottom of the lining tube 53, and the diameter of the conical head 54 is larger than that of the support tube 51; threads 55 meshed with the inclined strut 5 and the support cylinder 51 are respectively arranged on the inner wall and the outer wall of the liner 53, the liner 53 ascends along the inclined strut 5 through rotation, and the support cylinder 51 descends along the inclined strut 5, so that the conical head 54 of the liner 53 supports the bottom of the support cylinder 51; during operation, the pile foundation of the pile type pier 1 in the ground is mostly longer than the pier length exposed out of the ground, so that the maximum bending moment of the section of the pile type pier 1 is below the ground, and the stability of the pile type pier 1 can be interfered by the transverse movement of a ground soil layer; the inclined strut 5 arranged on the pier cage body 11 is extended into the ground soil layer, the wedge groove 52 surrounded at the bottom end of the strut cylinder 51 promotes the unfolding process of the strut cylinder 51 under the action of the conical head 54, the meshing thread 55 arranged between the lining cylinder 53 and the inclined strut 5 is convenient for controlling the lifting distance of the lining cylinder 53 on the inclined strut 5, the bottom end of the support cylinder 51 is squeezed open by rotating the lining cylinder 53 to enable the conical head 54 at the bottom of the lining cylinder to extrude the bottom end of the support cylinder 51 to be opened in the soil layer, and meanwhile in the process of unfolding the support cylinder 51, the soil contacted with the inclined strut plays a role in compacting, so that the inclined strut 5 forms an anchoring effect compared with the cage body 11, and then stabilized the gesture of bracing 5, strengthened pier cage 11's stability, and the hindrance to soil layer lateral shifting has still been increased to the support section of thick bamboo 51 bottom that expandes, has increased the stability of 1 regional soil layer of stake formula pier to the geological environment that stake formula steel structure bridge construction is suitable for has been promoted.

As an embodiment of the invention, the bottom surface of the bridge box body 2 is also provided with arc-shaped convex ridges 6, and the convex ridges 6 are positioned at the end parts of the bridge box body 2; the joist 12 is also provided with an arc-shaped concave surface 121; the bridge box body 2 is arranged in a concave surface 121 on the joist 12 through convex ridges 6; a columnar adhesive tape 61 is arranged between the convex ridge 6 and the joist 12, and the adhesive tape 61 is parallel to the length direction of the bridge box body 2; when the bridge box body 2 works, the bridge box body can shake and displace under the influence of vehicle passing and environmental wind on the bridge deck; through setting up curved ridge 6 on bridge box 2, make the displacement that bridge box 2 rocked the back on the pier and produce restore to the concave surface 121 central point of joist 12 along the cambered surface of ridge 6 under the action of gravity, the column adhesive tape 61 that sets up follows up and moves at bridge box 2's displacement in-process, the collision that has produced when sliding between bridge box 2 and joist 12 has been avoided, make bridge box 2 play the cushioning effect to the weight of joist 12, and when pile column pier 1 is installed to bridge box 2, the trace that utilizes ridge 6 to produce on joist 12 slides and can fix a position the focus of bridge box 2 to the central point of joist 12 on, and then the planarization on the road bed road surface on bridge box 2 has been maintained, and the installation operation of bridge box 2 in the construction has been optimized, thereby the construction effect of pile column steel construction bridge has been promoted.

As an embodiment of the present invention, upright guard rails 34 are further disposed on two sides of the bridge deck frame 3, and openings 341 are further disposed on the inner sides of the guard rails 34 facing the bridge deck frame; the opening 341 is also provided with an air pipe 342 fixedly connected inside the guardrail 34, and the air pipe 342 is communicated to the through hole 33 of the bridge cushion frame; in operation, guardrail 34 of bridge both sides is used for protecting the vehicle of out of control to roll over the bridge floor, through setting up opening 341 on guardrail 34 outside, make the environmental wind that blows to the bridge enter into through hole 33 along opening 341 on the railing, and in the through hole 33 of flow direction bridge pad frame along tuber pipe 342, set up opening 341 on through hole 33 and guardrail 34 of bridge pad frame, the environmental wind that makes the bridge both sides direction produce can both be blown in the road bed layer of bridge floor pad frame 3, and the intercommunication has formed the wind path between through hole 33 and tuber pipe 342, air current in the environment leads formation heat convection effect, be convenient for carry out heat-conduction with the material of road bed layer, the effect of road bed layer along with temperature variation has been strengthened, thereby the operational effect of stake formula steel construction bridge road bed road surface has been promoted.

As an embodiment of the invention, the top of the inclined strut 5 is further provided with a limiting plate 7, the limiting plate 7 is fixed in the concrete poured at the bottom of the cage body 11, and the surface of the limiting plate 7 is provided with a limiting hole 71; the top of the inclined strut 5 is arranged in the limiting hole 71 through a fastener; the during operation, bracing 5 will prop the displacement that a section of thick bamboo 51 bottom struts the in-process and produce burying the soil layer, install the top of bracing 5 in different spacing hole 71 on limiting plate 7 through the fastener, change the position of bracing 5 top on limiting plate 7, make bracing 5 support cage 11 with the state of stabilizing in the ground soil layer, and fix limiting plate 7 in the concrete structure that fills in cage 11 bottom, make among stake formula pier 1 transmits the effort of bracing 5 to the concrete structure that fills in the ground stake hole, the steel construction of avoiding the strong point of bracing 5 effort to transmit on cage 11 produces uneven moment of flexure, thereby the operation effect of stake formula steel construction bridge road bed road surface has been promoted.

As an embodiment of the present invention, an arc-shaped plastic beam 72 is further disposed on the limiting plate 7; one end of the plastic beam 72 is welded and fixed on the limiting plate 7, the other end of the plastic beam 72 is provided with a fixedly connected support column 73, and the bottom of the support column 73 is provided with a cross plate 74 and is embedded into a soil layer on the ground; during operation, through will propping post 73 and bury in the ground soil layer of 1 circumference of stake column pier, the cross 74 of cooperation prop 73 bottom for the soil layer in 1 region of firm stake column pier, and produce the lateral displacement back in ground soil layer, enlarge the effort to propping post 73 through the cross-section of cross 74 in the soil layer, make prop 73 increase the radian that the plasticity roof beam 72 was bent, change the gesture of stake column pier 1 through propping post 73 with the micro lateral displacement of avoiding the soil layer, thereby maintained the operational effect of stake column steel construction bridge.

The invention relates to a pile type steel structure bridge roadbed pavement construction method, which is suitable for the pile type steel structure bridge roadbed pavement, and comprises the following steps:

s1, excavating a foundation pit at a position calibrated in a construction drawing, controlling the position precision and the verticality of the foundation pit to meet technical requirements, then embedding a pile casing in the foundation pit, drilling and forming a pile hole by using construction equipment, pouring slurry into the pile hole, brushing the wall and cleaning the bottom after the pile hole is formed, so as to prepare for hoisting the cage body 11 of the pile-column type pier 1 into the pile hole;

s2, in the hoisting process of the cage body 11 of the pile pier 1, controlling the speed of lowering the reinforcement cage into the pile hole to be maintained at 0.8-1.8m/min, heating by using a gas cutting gun in the process of sinking the reinforcement cage into the pile hole, immediately installing a conduit for pouring concrete to pour the underwater concrete after the reinforcement cage sinks in the pile hole, pumping out the slurry in the pile hole and lifting the height of the conduit in the pouring process;

s3, in 48h after the concrete in the pile hole of the S2 is poured, the inclined strut 5 is pressed into a soil layer in the circumferential direction of the pile type pier 1 and is connected to the top of the poured concrete pile through a limiting plate 7, then the bridge box body 2 is installed, an end plate 21 of the bridge box body 2 is placed between two joists 12 at the top end of the cage body 11, a convex ridge 6 of the bridge box body 2 is lapped on a concave surface 121 of the joists 12, then a bolt 23 is installed on a through hole 22 of the end plate 21, and adjacent bridge box bodies 2 are connected together;

s4, before the bridge box body 2 in the S3 is installed, paving a bridge deck pad frame 3, placing a wavy pad plate 31 in the bridge deck pad frame 3 in the length direction of the bridge box body 2, adding sand of a path material into the wavy pad plate, adding stones into a roadbed material after the height of the sand reaches a steel wire mesh 32 in the bridge deck pad frame 3, enabling the sand ratio above the steel wire mesh 32 to be within the range of 1:1.3-1:1.5, and pouring a pavement layer after the pavement layer is paved;

s5, after paving the road base layer in the S4, binding reinforcing steel bars of the guardrails 34 on two sides of the bridge deck pad frame 3, installing guardrail 34 templates, and then embedding plastic pipelines as through holes 33 on the formed bridge deck pad frame 3 and air pipes 342 in the guardrails 34 of the bridge in the process of pouring concrete at the positions of the guardrails 34;

and S6, after the pavement layer in the S4 is poured, a groove for installing the expansion joint 4 is formed in the pavement layer at the end part of the adjacent bridge box body 2, then the bridge box body 2 in the S3 is installed, and the installation of the expansion joint 4 is completed before the bolts 23 installed on the end plate 21 are locked.

As an embodiment of the invention, before the sandstone material of the road base layer is laid on the bridge box body 2, the treatment steps are as follows:

I. firstly, separating sand from a roadbed layer material by a screen, putting the separated sand on an oven plate, heating to 140-180 ℃ for more than 40min, putting the separated stone on the oven plate, heating to 90-130 ℃ for more than 20min, and then paving the heated sand in a bridge deck cushion frame 3 on a bridge box body 2 until the sand reaches a steel wire mesh 32 of the bridge deck cushion frame 3;

II. After the sand in the I is paved, continuously paving a sand layer of 1.5-2.5cm above the steel wire mesh 32, then uniformly paving stones in the roadbed material on the sand layer, controlling the thickness of the stone layer to be 4-5cm, supplementing the sand among gaps of the stones to enable the sand layer to permeate the stone layer by 1-2cm, measuring the temperature of the sand in the roadbed layer by a thermometer, reducing the temperature to 20-30 ℃, and then pouring the concrete pavement layer.

As an embodiment of the present invention, after the heating, the gravel material of the road base layer is directly laid in the bridge deck pad frame 3 of the bridge box body 2, and then the subsequent road surface layer is poured, and the paving of the road base and the road surface is completed before the bridge box body 2 is installed on the pile pier 1; the heated gravel materials are directly paved on the bridge box body 2, so that the temperature of the gravel is conducted to the bridge box body 2 and the bridge deck cushion frame 3, the temperature difference between the steel structure bridge deck and the road bed layer is reduced, then, in the process of pouring the concrete on the road surface layer, the bridge members are in the same trend of cooling process along with the concrete, and the quality of the road bed and the road surface formed on the bridge box body 2 is ensured.

As an embodiment of the present invention, before the concrete of the pavement layer is poured into the roadbed layer of the bridge deck pad frame 3, atomized water droplets are sprayed onto the sandstone material, and the atomized water droplets are blown into the through holes 33 of the bridge deck pad frame 3 by using a blower; the influence of the heat of the gravel materials in the roadbed layer on the concrete solidification process is reduced through the sprayed water drops, and the air flow in the through holes 33 is blown by the air blower, so that the heat convection effect in the concrete solidification process is promoted, the evaporation effect of the water drops attached to the surfaces of the gravel is enhanced, the temperature rise of the concrete in the solidification process is further reduced, and the construction effect of the steel structure bridge roadbed pavement is ensured.

The specific working process is as follows:

the bridge deck cushion frame 3 is welded and fixed on the bridge box body 2, when the bridge roadbed and pavement construction is carried out, sand stones in paved roadbed materials are separated by the steel wire mesh 32, sand with smaller particle size penetrates through the steel wire mesh 32 to enter the bridge box body 2 at the bottom of the cushion plate 31, larger stones are intercepted in the space of the cushion plate 31 above the steel wire mesh 32, only sand is stored below the steel wire mesh 32 in a roadbed layer, mixed sand stones are stored above the steel wire mesh 32, the bottom of the roadbed layer is contacted with the bridge box body 2 through the sand, the supporting effect of dense sand grains on the wavy cushion plate 31 is ensured, the cushion plate 31 is prevented from being extruded and deformed by the upper and lower side stones, partial stress change born by a roadbed is buffered through micro-deformation of the wavy cushion plate 31 under stress, and the thickness of the roadbed layer on the bridge is reduced, the through holes 33 on the bridge cushion frame are used for matching with the waved cushion plates 31, so that the atmosphere with the change of the environmental temperature conducts heat to the contacted sand gaps through the through holes 33, the roadbed layer generates micro deformation with the same trend along with the bridge box bodies 2 of the steel structure, the fixed state of the roadbed layer on the bridge box bodies 2 of the steel structure is ensured, in the process of constructing the steel structure bridge, the end plates 21 of the bridge box bodies 2 are clamped between the joists 12 at the tops of the piers to complete the positioning of the bridge box bodies 2, then the locking nuts are installed in the through holes 22 of the end plates 21, the position states of the adjacent bridge box bodies 2 on the pile pier 1 are corrected through the locking nuts, then the expansion joints 4 between the bridge box bodies 2 are laid on a roadbed, and finally the construction of a concrete pavement is carried out; the inclined strut 5 is arranged on the pier cage body 11 and extends into the ground soil layer, the wedge groove 52 surrounding the bottom end of the strut cylinder 51 is arranged to promote the unfolding process of the strut cylinder 51 under the action of the conical head 54, the meshing thread 55 arranged between the lining cylinder 53 and the inclined strut 5 is convenient for controlling the lifting distance of the lining cylinder 53 on the inclined strut 5, the conical head 54 at the bottom of the lining cylinder 53 is rotated to extrude the bottom end of the strut cylinder 51, so that the bottom end of the strut cylinder 51 is unfolded in the soil layer, and meanwhile, in the unfolding process of the strut cylinder 51, the effect of compacting the soil contacted with the strut cylinder is achieved, so that the inclined strut 5 forms an anchoring effect compared with the cage body 11, the posture of the inclined strut 5 is further stabilized, the stability of the pier cage body 11 is enhanced, the bottom of the unfolded strut cylinder 51 is further provided with a barrier to the transverse movement of the soil layer, and the stability of the soil layer in the area of the pile type pier 1 is enhanced; set up curved ridge 6 on bridge box 2, make bridge box 2 rock the displacement that the back produced under the effect of gravity along the cambered surface of ridge 6 and resume concave surface 121 central point of joist 12 to put on the pier, the column adhesive tape 61 of setting follows up with moving at bridge box 2's displacement in-process, the collision that has produced when sliding between bridge box 2 and joist 12 has been avoided, make bridge box 2 play the cushioning effect to the weight of joist 12, and when pile column pier 1 is installed to bridge box 2, the trace that utilizes ridge 6 to produce on joist 12 slides and can fix a position the focus of bridge box 2 to the central point of joist 12 on, and then the planarization on road bed road surface on bridge box 2 has been maintained, and the installation operation of bridge box 2 in the construction has been optimized.

In order to verify the application effect of the pile type steel structure bridge roadbed pavement, the following tests are carried out:

the pile type steel structure bridge roadbed pavement construction method is provided for bridge construction enterprises, and a steel structure bridge with the length of 30m is constructed and a load experiment is carried out; constructing the roadbed and the pavement of the pile type steel structure bridge, and marking the roadbed and the pavement as a first bridge box body; the pile type steel structure bridge roadbed pavement has the bridge deck cushion frame removed and is marked as a bridge box body II; the pile type steel structure bridge has the advantages that convex ridges and concave surfaces on joists are removed, and the pile type steel structure bridge is marked as a bridge box body III; and the roadbed and the pavement of the pile type steel structure bridge constructed by a certain construction method are marked as a bridge box body IV; after the construction of the bridge roadbed pavement is completed and the acceptance is qualified, the bridge box body is weighed and subjected to 30-day cyclic load fatigue test, the number of cracks on the bridge pavement, the flatness of the pavement and the displacement of the bridge box body are recorded, and the data are shown in the following table:

according to the experimental group, the experimental performance parameters of the pile type steel structure bridge subgrade and pavement constructed by different construction methods are different, and the data deviation caused by measurement errors in the experiment is out of the discussion range of the scheme;

in the first bridge box body, the data of the self-weight parameters and the pavement test quality effect of the pile column type steel structure bridge roadbed pavement are best in comprehensive;

in the second bridge box body, the pile type steel structure bridge roadbed pavement is used, the bridge deck cushion frame is removed, the self weight is increased, the quality of the bridge deck is greatly reduced, and the offset data of the bridge box body is still kept at a good level;

in the third bridge box body, the pile type steel structure bridge is used, the convex ridges and the concave surfaces on the joists are removed, the data of the self-weight parameters and the quality of the bridge deck are close to the first bridge box body, but the offset of the bridge box body is poor, and the service life of the expansion joints between the bridge box bodies is shortened;

in the fourth bridge box body, the self weight of the pile type steel structure bridge roadbed pavement built by using a certain construction method is the largest in the tested bridge box body, and the offset of the bridge box body is also the largest;

in conclusion, the pile column type steel structure bridge roadbed pavement and the bridge deck cushion frame structure provided by the invention can be found to stabilize the pavement quality of the bridge on the premise of reducing the self weight of the bridge box body, and meanwhile, the convex ridges on the bridge box body and the concave surfaces on the joist reduce the offset of the bridge box body, so that the posture between the bridge box bodies is maintained, and the pavement quality between the bridge box bodies is ensured.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A pile column type steel structure bridge roadbed pavement comprises pile column type piers (1), a bridge box body (2) and a bridge deck pad frame (3); the method is characterized in that: the pile pier (1) is built in a pile hole excavated on the ground, and the top of the pile pier (1) is used for bearing a bridge box body (2); the end part of the bridge box body (2) is erected on the pile pier (1), a bridge deck pad frame (3) is arranged above the bridge box body (2), and an expansion joint (4) is further arranged between the bridge end of the bridge box body (2) and the bridge deck pad frame (3); the bridge deck pad frame (3) is used for embedding gravels as a road base layer, and concrete is poured above the road base layer as a road surface layer;

the upper part of the pile pier (1) is a steel cage body (11), and the cage body (11) is poured with concrete in a pile hole on the ground; two joists (12) are welded and fixed at the top end of the cage body (11), the joists (12) are perpendicular to the length direction of the bridge box body (2), two ends of the joists (12) are bent upwards, and the length of the joists (12) is greater than the width of the bottom surface of the bridge box body (2);

the bottom surface of the end part of the bridge box body (2) is also provided with an end plate (21), and the bridge box body (2) is installed behind the pile pier (1); the end plate (21) is positioned between the two joists (12) at the top of the cage body (11), a through hole (22) is formed in the end plate (21), and a locking bolt (23) is arranged in the through hole (22); the bolts (23) are connected to the end plates (21) of the adjacent bridge box bodies (2);

the bridge deck pad frame (3) is welded and fixed on the bridge box body (2) in a frame structure, the bottom of the bridge deck pad frame (3) is provided with wave-shaped pad plates (31), the pad plates (31) are distributed along the length direction of the bridge box body (2), steel wire meshes (32) are further welded and fixed among the pad plates (31), and the steel wire meshes (32) are used for intercepting stones in roadbed materials; the bridge deck pad frame (3) is also provided with through holes (33) at two sides of the bridge box body (2).

2. The pile column type steel structure bridge roadbed pavement of claim 1, which is characterized in that: the cage body (11) is also provided with an inclined strut (5) on the concrete pile at the ground part, and the inclined strut (5) extends into a soil layer on the ground; the bottom of the inclined strut (5) is provided with a sleeved strut cylinder (51), and the bottom end of the strut cylinder (51) is provided with a surrounding wedge groove (52); a sleeved lining sleeve (53) is further arranged between the support sleeve (51) and the inclined support (5), the lining sleeve (53) protrudes out of two ends of the support sleeve (51), a flange is arranged at the top of the lining sleeve (53) and abuts against the top end of the support sleeve (51), a conical head (54) is arranged at the bottom of the lining sleeve (53), and the conical head (54) is larger than the diameter of the support sleeve (51); threads (55) meshed with the inclined strut (5) and the support cylinder (51) are respectively arranged on the inner wall and the outer wall of the liner cylinder (53), the liner cylinder (53) ascends along the inclined strut (5) through rotation, the support cylinder (51) descends along the inclined strut (5), and the conical head (54) of the liner cylinder (53) enables the bottom of the support cylinder (51) to be supported.

3. The pile column type steel structure bridge roadbed pavement of claim 1, which is characterized in that: the bottom surface of the bridge box body (2) is also provided with an arc-shaped convex ridge (6), and the convex ridge (6) is positioned at the end part of the bridge box body (2); an arc-shaped concave surface (121) is also arranged on the joist (12); the bridge box body (2) is carried in a concave surface (121) on the joist (12) through convex ridges (6); a columnar adhesive tape (61) is arranged between the convex ridge (6) and the joist (12), and the adhesive tape (61) is parallel to the length direction of the bridge box body (2).

4. The pile column type steel structure bridge roadbed pavement of claim 1, which is characterized in that: upright guardrails (34) are further arranged on two sides of the bridge deck pad frame (3), and openings (341) are further formed in the inner sides, facing the bridge deck pad frame, of the guardrails (34); the opening (341) is also provided with a fixedly connected air pipe (342) inside the guardrail (34), and the air pipe (342) is communicated into a through hole (33) of the bridge pad frame.

5. The pile column type steel structure bridge roadbed pavement of claim 2, wherein: a limiting plate (7) is further arranged at the top of the inclined strut (5), the limiting plate (7) is fixed in concrete poured at the bottom of the cage body (11), and a limiting hole (71) is formed in the surface of the limiting plate (7); the top of the inclined strut (5) is installed in the limiting hole (71) through a fastener.

6. The pile column type steel structure bridge roadbed pavement of claim 5, wherein: the limiting plate (7) is also provided with an arc-shaped plastic beam (72); one end of the plastic beam (72) is welded and fixed on the limiting plate (7), the other end of the plastic beam (72) is provided with a fixedly connected support column (73), and the bottom of the support column (73) is provided with a cross plate (74) and is embedded into a soil layer on the ground.

7. A pile type steel structure bridge roadbed pavement construction method is characterized in that; the construction method is suitable for the pile column type steel structure bridge subgrade pavement of any one of claims 1 to 6, and comprises the following steps:

s1, excavating a foundation pit at a position calibrated in a construction drawing, controlling the position precision and the verticality of the foundation pit to meet technical requirements, then embedding a pile casing in the foundation pit, drilling and forming a pile hole by using construction equipment, pouring slurry into the pile hole, brushing the wall and cleaning the bottom after the pile hole is formed, so as to prepare for hoisting a cage body (11) of the pile-column type pier (1) into the pile hole;

s2, in the hoisting process of a cage body (11) of the pile pier (1), controlling the speed of lowering the reinforcement cage into the pile hole to be maintained at 0.8-1.8m/min, heating by using a gas cutting gun in the process of sinking the reinforcement cage into the pile hole, immediately installing a conduit for pouring concrete after the reinforcement cage sinks in the pile hole to pour the underwater concrete, and simultaneously pumping out slurry in the pile hole and lifting the height of the conduit in the pouring process;

s3, in 48h after pouring of concrete in the pile hole of the S2, supporting an inclined strut (5) into a soil layer in the circumferential direction of the pile pier (1), connecting the inclined strut to the top of a poured concrete pile through a limiting plate (7), then installing a bridge box body (2), placing an end plate (21) of the bridge box body (2) between two joists (12) at the top end of a cage body (11), enabling a convex ridge (6) of the bridge box body (2) to be lapped on a concave surface (121) of each joist (12), then installing a bolt (23) on a through hole (22) of each end plate (21), and connecting adjacent bridge box bodies (2) together;

s4, before the bridge box body (2) in the S3 is installed, paving a bridge deck pad frame (3), placing a wavy pad plate (31) in the bridge deck pad frame (3) in the length direction of the bridge box body (2), adding sand of a path material into the wavy pad plate, adding stones into a roadbed material after the height of the sand reaches a steel wire mesh (32) in the bridge deck pad frame (3), enabling the sand ratio above the steel wire mesh (32) to be within the range of 1:1.3-1:1.5, and pouring a roadbed layer after paving a roadbed layer;

s5, after paving the road base layer in the S4, binding reinforcing steel bars of guardrails (34) on two sides of the bridge deck pad frame (3) and installing guardrail (34) templates, and then embedding plastic pipelines as through holes (33) on the formed bridge deck pad frame (3) and air pipes (342) in the guardrails (34) of the bridge in the process of pouring concrete at the positions of the guardrails (34);

and S6, after the pavement layer in the S4 is poured, a groove for installing the expansion joint (4) is formed in the pavement layer at the end part of the adjacent bridge box body (2), then the bridge box body (2) in the S3 is installed, and the installation of the expansion joint (4) is completed before the bolts (23) installed on the end plate (21) are locked.

8. The pile column type steel structure bridge roadbed pavement construction method according to claim 7, characterized in that: the processing steps of the sandstone materials of the road base layer before being paved on the bridge box body (2) are as follows:

I. firstly, separating sand from a roadbed layer material through a screen, putting the separated sand on an oven plate, heating to 140-180 ℃ for more than 40min, putting the separated stones on the oven plate, heating to 90-130 ℃ for more than 20min, and then paving the heated sand in a bridge deck cushion frame (3) on a bridge box body (2) until the sand reaches a steel wire mesh (32) of the bridge deck cushion frame (3);

II. After the sand in the I is paved, continuously paving a sand layer of 1.5-2.5cm above the steel wire mesh (32), then uniformly paving stones in the roadbed material on the sand layer, controlling the thickness of the stone layer to be 4-5cm, supplementing the sand among gaps of the stones to enable the sand layer to permeate the stone layer by 1-2cm, measuring the temperature of the sand in the roadbed layer by a thermometer, reducing the temperature to 20-30 ℃, and then pouring the concrete pavement layer.

9. The pile column type steel structure bridge roadbed pavement construction method according to claim 7, characterized in that: the gravel material of the road base layer is directly paved in a bridge deck pad frame (3) of the bridge box body (2) after the heating is finished, then the subsequent road surface layer is poured, and the paving of the road base and the road surface is finished before the pile column type bridge piers (1) are installed on the bridge box body (2).

10. The pile column type steel structure bridge roadbed pavement construction method according to claim 9, characterized in that: before concrete of the pavement layer is poured on a road base layer of the bridge deck pad frame (3), atomized water drops are sprayed on the gravel material, and the gravel material is blown into the through holes (33) of the bridge deck pad frame (3) by an air blower.

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