Bridge abutment of steel trestle and construction method of bridge abutment

Abstract

The invention discloses a bridge abutment of a steel trestle and a construction method of the bridge abutment, the bridge abutment comprises a bottom bridge abutment and an upper bridge abutment, a vehicle walks to a transition slab on a soil slope filling body, the load of the transition slab is transmitted to a supporting steel plate through the transition slab, and damping and resetting are performed through an elastic assembly of a connecting piece, so that the vehicle springboard is relieved, and the service life of the vehicle is prolonged. When the vehicle walks to the bridge deck steel plate, the load presses the supporting steel plate of the first supporting table, so that the elastic assembly and the butt strap are reset.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly to an abutment of a steel trestle bridge and a construction method thereof. Background Art

[0002] Bridge construction is a complex process involving multiple aspects. It not only includes building the physical structure of the bridge according to the design drawings, but also involves key elements such as construction technology, construction organization, construction management, and construction quality. In many engineering fields, such as construction, bridges, aviation, and pipeline lines, inclined trestle bridges are prone to swing or translational movement under the impact of vehicle loads. In traditional steel frame construction, there are some efficiency problems. To overcome these technical problems, a new steel trestle bridge abutment and its construction method are proposed. This method aims to improve the efficiency and flexibility of construction. Through innovative design and construction techniques, the structure of the abutment is made safer and more reliable. Summary of the Invention

[0003] The purpose of the present invention is to provide an abutment of a steel trestle bridge and a construction method thereof, so as to solve the problem that in the prior art, when the existing cast-in-place beam is constructed and erected, after the construction of the Bailey beam is completed as a whole, it cannot be effectively and quickly disassembled and moved. It is mostly disassembled and moved by personnel, and then erected, making the subsequent construction not very efficient.

[0004] To solve the above technical problems, the present invention provides the following technical solution: An abutment of a steel trestle bridge, which is used to connect the truss beam and the deck steel plate of an inclined foundation pit steel trestle bridge. The abutment includes a bottom abutment and an upper abutment, and is characterized in that:

[0005] The bottom abutment includes a lower abutment seat, a support steel plate, a bridging slab, and a connecting member; the connecting member connects the support steel plate and the bridging slab. The lower abutment seat is of a T-shaped structure, which is set as a structure with two side support platforms and a middle convex platform; the support steel plate is arranged on the first support platform on one side of the T-shaped structure, and an earth slope filling body is arranged on the second support platform on the other side of the T-shaped structure. The support steel plate is inclined. One end of the truss beam of the steel trestle bridge is arranged on the support steel plate; an inclined rubber is arranged between the support steel plate and the first support platform, and mounting holes are arranged on the support steel plate. A connecting column is welded on the truss beam, and a spring is sleeved on the connecting column and installed on the first support platform; the bridging slab is arranged on the middle convex platform of the lower abutment seat. One end of the bridging slab is in contact connection with the deck steel plate, and the other end of the bridging slab is in contact with the earth slope filling body; the connecting member is set as an elastic component;

[0006] The earth slope filling body is set as a triangular structure, extending to the bottom of the foundation pit, and the inclination angle of its waist is the same as the inclination angle of the deck steel plate;

[0007] The vehicle travels onto the bridging slab on the soil slope filling body. The load of the bridging slab is transmitted to the support steel plate through the bridging slab, and shock absorption and resetting are carried out through the elastic components of the connecting piece to relieve the vehicle springboard. When the vehicle travels onto the bridge deck steel plate, the load presses on the support steel plate of the first support platform, causing the elastic components and the bridging slab to reset;

[0008] The upper bridge abutment includes an upper bridge abutment seat, a sliding support, and a pre-buried inclined steel plate. A pre-buried inclined steel plate (61) is pre-buried on the upper bridge abutment, and the pre-buried inclined steel plate and the truss beam (1) are connected through a sliding support (62);

[0009] The sliding support includes a sliding shoe and a spherical bearing. The sliding shoe is arranged on the pre-buried inclined steel plate; stop blocks are arranged at the upper and lower ends of the pre-buried inclined steel plate; one end of the sliding shoe is provided with a groove of the spherical bearing, and the other end is provided with a plurality of contact sliding strips, and the contact sliding strips are in contact connection with the truss beam. The spherical bearing includes a hemispherical pendulum and a fixing structure, and the fixing structure connects the hemispherical pendulum to the truss beam. The inner wall of the groove of the sliding shoe is set as a concave spherical surface, and the hemispherical pendulum is an outer convex spherical surface. The hemispherical pendulum is arranged to rotate relative to the concave spherical surface of the sliding shoe, and polytetrafluoroethylene layers are arranged on the lower surface of the hemispherical pendulum and the inner wall of the groove.

[0010] A shock absorption mechanism is arranged on the inner side of the stop block, and the shock absorption mechanism is one of rubber, spring, and hydraulic support.

[0011] The elastic component includes multiple groups of springs, and hooks are arranged at both ends of the springs. The two ends of the hooks are respectively hung in the holes at the ends of the support steel plate and the bridging slab to form an elastic connection between the support steel plate and the bridging slab.

[0012] When the tire of the vehicle contacts the steel plate during travel, the force is transmitted from the upper bridge deck steel plate to the bottom soil slope, and a vertical shock absorption layer is arranged in the soil slope.

[0013] The lower bridge abutment seat and the bottom plate structure are cast simultaneously, and the connection between the support steel plate and the truss beam is welded by means of position limitation.

[0014] A construction method for the bridge abutment of a steel trestle is provided. The specific steps are as follows: Step (1): Preparation work. Construct the foundation pit bottom plate in the completed foundation pit, and construct the main structure of the steel trestle, including steel columns and truss beams. Construct the bridge deck steel plate on the truss beam, install the bridge deck steel plate and auxiliary facilities, install the transverse distribution beams on the truss beam in sequence and install the bridge deck steel plate on them. After installing the bridge deck steel plate, set up the sidewalk and guardrail, and finally backfill and harden the bottom soil slope;

[0015] Step (ii): when installing the truss beam, first set up the middle truss beam and then install the truss beams on both sides. When installing the truss beams on both sides, first construct the lower truss beam and then construct the upper truss beam. When constructing the lower truss beam, the lower bridge pedestal and the bottom plate structure are cast at the same time, and the support steel plate and the truss beam are connected by limited welding; wherein the lower bridge pedestal is a T-shaped structure, which is set as a structure of support platforms on both sides and a middle boss; the support steel plate is set on the first support platform on one side of the T-shaped structure, and a soil slope filling body is set on the second support platform on the other side of the T-shaped structure, the support steel plate is inclined, and one end of the truss beam of the steel trestle is set on the support steel plate; connect the installation hole and the connecting column, and set an inclined rubber between the support steel plate and the first support platform, so that the truss beam and the first support platform form a buffer connection; then install the take-up plate, which is set on the middle boss of the lower bridge pedestal, and one end of the take-up plate is in contact with the bridge deck steel plate, and the other end of the take-up plate is in contact with the soil slope filling body;

[0016] Installing an elastic component, the elastic component includes multiple groups of springs, and hooks are arranged at both ends of the springs. The two ends of the hooks are respectively hung in the holes at the ends of the supporting steel plate and the strapping plate to form an elastic connection between the supporting steel plate and the strapping plate;

[0017] Step (iii): earth slope filling, the earth slope filling body is set as a triangular structure, extending to the bottom of the foundation pit, and the inclination angle of its waist is consistent with the inclination angle of the bridge deck steel plate; the vehicle walks to the scaffolding on the earth slope filling body, the load of the scaffolding is transmitted to the supporting steel plate through the scaffolding, and the elastic component of the connecting piece is used to reduce shock and reset, so as to relieve the vehicle springboard, and when the vehicle walks to the bridge deck steel plate, the load is pressed on the supporting steel plate of the first supporting platform, so that the elastic component and the scaffolding are reset.

[0018] Step (iii): construct the upper truss beam and the sliding bearing, and arrange a pre-embedded inclined steel plate (61) on the upper abutment, and then arrange the sliding shoe on the pre-embedded inclined steel plate; arrange a groove of a spherical bearing at one end of the sliding shoe, and arrange a plurality of contact sliding strips at one end, and the contact sliding strips are contact-connected with the truss beam, so that the contact surface of the sliding shoe is spherical contact at one end and plane contact at the other end, so as to ensure the force transmission in the two working conditions of rotation and translation.

[0019] The soil slope comprises a vertical shock-absorbing layer, wherein the vertical shock-absorbing layer comprises a concrete cushion layer (80) at the bottom and connected to the foundation pit bottom plate, a gravel layer (81) is arranged on the cushion layer, a medium sand particle layer (82) is filled on the gravel layer and compacted, and after compaction, a rubber particle layer (83) is laid on the medium sand particle layer, and a clay layer (84) is arranged on the rubber particle layer, and the clay layer is in contact with the slab.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. The abutment of the steel trestle of this application adopts the method of separately setting shock absorption and bearings for the upper and lower abutments. This setting can greatly meet the rolling of heavy-duty vehicles and reduce the occurrence of springboards.

[0022] 2. The abutment of the steel trestle of this application can simultaneously meet the requirements of saving construction period. After demolition, the components can be recycled, saving project costs.

[0023] 3. The abutment of the steel trestle of this application has the dual bearing effects of translatability and rotatability. The lower abutment is provided with a force transmission spring assembly for buffering and restoring, reducing rigid collisions and alleviating vehicle springboards. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0025] Figure 1 is a side view of the upper abutment of the present invention;

[0026] Figure 2 is a side view of the lower abutment of the present invention;

[0027] Figure 3 is a top view of the sliding bearing of the present invention.

[0028] In the figure: 1. Truss beam; 2. Bridge deck steel plate; 31. Bottom abutment; 32. Upper abutment; 33. Spring assembly; 311. Lower abutment seat; 312. Support steel plate; 313. Apron; 314. Connecting piece; 315. First support platform; 316. Second support platform; 317. Embankment filling; 318. Inclined rubber; 319. Installation hole; 320. Connecting column; 34. Intermediate boss; 321. Upper abutment seat; 322. Sliding bearing; 323. Embedded inclined steel plate; 3221. Slide shoe; 3222. Spherical bearing; 324. Stop block; 3241. Shock absorption mechanism; 325. Contact sliding strip; 331. Hook; 40. Concrete cushion; 41. Gravel layer; 42. Medium sand particle layer; 43. Rubber particle layer; 44. Clay layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] Please refer toFigures 1 - 3 , the present invention provides a technical solution: an abutment of a steel trestle for connecting a truss beam 1 and a deck steel plate 2 of an inclined foundation pit steel trestle, the abutment comprising a bottom abutment 1 and an upper abutment 2;

[0032] The bottom abutment includes a lower abutment seat 311, a support steel plate 312, a bridging plate 313 and a connecting member 314; the connecting member connects the support steel plate 312 and the bridging plate 313, the lower abutment seat 311 is of a T-shaped structure, configured as two side support platforms and a middle convex platform 324; the support steel plate 312 is disposed on a first support platform 315 on one side of the T-shaped structure, and an embankment filling 317 is provided on a second support platform 316 on the other side of the T-shaped structure. The support steel plate is inclined, and one end of the truss beam of the steel trestle is disposed on the support steel plate; an inclined rubber 318 is provided between the support steel plate 312 and the first support platform 315, and mounting holes 319 are provided on the support steel plate. A connecting column 320 is welded on the truss beam 1, and a spring is sleeved on the connecting column and installed on the first support platform 315; the bridging plate is disposed on the middle convex platform 324 of the lower abutment seat, one end of the bridging plate 313 is in contact connection with the deck steel plate 2, and the other end of the bridging plate 313 is in contact with the embankment filling 317; the connecting member is configured as an elastic component 33;

[0033] The embankment filling 317 is configured as a triangular structure, extending to the bottom of the foundation pit, and the inclination angle of its waist is the same as the inclination angle of the deck steel plate 2;

[0034] When a vehicle travels onto the bridging plate on the embankment filling, the load of the bridging plate is transmitted to the support steel plate through the bridging plate, and shock absorption and resetting are performed through the elastic component of the connecting member to relieve the vehicle springboard. When the vehicle travels onto the deck steel plate, the load presses on the support steel plate of the first support platform, causing the elastic component 33 and the bridging plate to reset;

[0035] The upper abutment 2 includes an upper abutment seat 321, a sliding support 322 and a pre-embedded inclined steel plate 323. A pre-embedded inclined steel plate 323 is provided on the upper abutment, and the pre-embedded inclined steel plate 323 and the truss beam 1 are connected through a sliding support;

[0036] The sliding support 322 includes a sliding shoe 3221 and a spherical bearing 3222. The sliding shoe 3221 is arranged on the embedded inclined steel plate 323. Stopping blocks 324 are arranged at the upper and lower ends of the embedded inclined steel plate 323. One end of the sliding shoe 3221 is provided with a groove cooperating with the spherical bearing 3222, and the other end is provided with a plurality of contact sliding strips 325. The contact sliding strips 325 are in contact connection with the truss beam 1. The spherical bearing 3222 includes a hemispherical pendulum 3223 and a fixing structure 3224. The fixing structure connects the hemispherical pendulum 3223 to the truss beam. The inner wall of the groove of the sliding shoe is set as an inner concave spherical surface, and the hemispherical pendulum 3223 is an outer convex spherical surface. The hemispherical pendulum is arranged to rotate relative to the inner concave spherical surface of the sliding shoe. PTFE layers are arranged on the lower surface of the hemispherical pendulum and the inner wall of the groove.

[0037] A shock absorption mechanism 3241 is arranged on the inner side of the stopping block 324. The shock absorption mechanism is one of rubber, a spring and a hydraulic support.

[0038] The elastic component 33 includes multiple groups of springs. Hooks 331 are arranged at both ends of the springs. The two ends of the hooks are respectively hung in the holes at the ends of the support steel plate and the bridging plate to form an elastic connection between the support steel plate and the bridging plate.

[0039] When the tire contacts the steel plate during the vehicle traveling, the force is transmitted from the upper bridge deck steel plate to the bottom soil slope, and a vertical shock absorption layer is arranged in the soil slope.

[0040] The lower bridge abutment seat 311 is cast simultaneously with the bottom plate structure. The position where the support steel plate is connected to the truss beam adopts limit welding.

[0041] The present invention also provides a construction method for the bridge abutment of a steel trestle, which is characterized in that:

[0042] Step (1): Preparation work. Construct the foundation pit bottom plate in the constructed foundation pit, and construct the main structure of the steel trestle including steel columns and truss beams. Construct the bridge deck steel plate on the truss beams, install the bridge deck steel plate and auxiliary facilities. Install the transverse distribution beams on the truss beams in sequence and install the bridge deck steel plate on them. After installing the bridge deck steel plate, set up the sidewalk and guardrail, and finally backfill and harden the bottom soil slope.

[0043] Step (2): When installing the truss beam, first erect the middle truss beam and then install the truss beams on both sides. When installing the truss beams on both sides, first construct the lower truss beam and then the upper truss beam. When constructing the lower truss beam, the lower abutment seat and the bottom plate structure are poured simultaneously, and the connection between the support steel plate and the truss beam is welded with a limit. The lower abutment seat is of a T-shaped structure, which is set as a structure with two side support platforms and a middle convex platform. The support steel plate is arranged on the first support platform on one side of the T-shaped structure, and an earth slope filling body is arranged on the second support platform on the other side of the T-shaped structure. The support steel plate is inclined, and one end of the truss beam of the steel trestle is arranged on the support steel plate. Connect the installation hole and the connecting column. An inclined rubber is arranged between the support steel plate and the first support platform, so that a buffer connection is formed between the truss beam and the first support platform. Then install the approach slab. The approach slab is arranged on the middle convex platform of the lower abutment seat. One end of the approach slab is in contact connection with the bridge deck steel plate, and the other end of the approach slab is in contact with the earth slope filling body.

[0044] Install the elastic component. The elastic component includes multiple groups of springs, and hooks are arranged at both ends of the springs. The two ends of the hooks are respectively hung in the holes at the ends of the support steel plate and the approach slab to form an elastic connection between the support steel plate and the approach slab.

[0045] Step (3): Earth slope filling. The earth slope filling body is of a triangular structure and extends to the bottom of the foundation pit. The inclination angle of its waist is the same as that of the bridge deck steel plate. The vehicle walks onto the approach slab on the earth slope filling body. The load of the approach slab is transmitted to the support steel plate through the approach slab, and is shock-absorbed and reset through the elastic component of the connecting piece to relieve the vehicle springboard. When the vehicle walks onto the bridge deck steel plate, the load presses on the support steel plate of the first support platform, so that the elastic component and the approach slab are reset.

[0046] Step (3): Construct the upper truss beam and the sliding support. An embedded inclined steel plate is arranged on the upper bridge abutment, and then the sliding shoe is arranged on the embedded inclined steel plate. A groove for the spherical bearing is arranged at one end of the sliding shoe, and a number of contact sliding strips are arranged at the other end. The contact sliding strips are in contact connection with the truss beam, so that the contact surface of the sliding shoe is spherical contact at one end and flat contact at the other end, ensuring the force transmission under two working conditions of rotation and translation.

[0047] The earth slope includes a vertical shock-absorbing layer. The vertical shock-absorbing layer includes a concrete cushion layer 40 at the bottom which is connected to the foundation pit bottom plate. A gravel layer 41 is arranged on the cushion layer. A medium sand particle layer 42 is filled on the gravel layer and compacted. After being compacted, a rubber particle layer 43 is laid on the medium sand particle layer, and a clay layer 44 is arranged on the upper part of the rubber particle layer. The clay layer is in contact with the approach slab.

[0048] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge abutment of a steel trestle bridge, used to connect a truss beam (1) and a bridge deck steel plate (2) of an inclined foundation pit steel trestle bridge, the bridge abutment comprising a bottom abutment (31) and an upper abutment (32), wherein: The bottom abutment comprises a lower bridge pedestal (311), a supporting steel plate (312), a strapping plate (313) and a connecting piece (314); the connecting piece connects the supporting steel plate (312) and the strapping plate (313); the lower bridge pedestal (311) is a T-shaped structure, which is configured as a structure of supporting platforms on both sides and a middle boss (34); the supporting steel plate (312) is configured on a first supporting platform (315) on one side of the T-shaped structure, and a soil slope filling body (317) is configured on a second supporting platform (316) on the other side of the T-shaped structure; the supporting steel plate is configured in an inclined manner, and one end of the truss beam of the steel trestle is configured The supporting steel plate; an inclined rubber (318) is arranged between the supporting steel plate (312) and the first supporting platform (315), and a mounting hole (319) is arranged on the supporting steel plate; a connecting column (320) is welded on the truss beam (1), a spring is sleeved on the connecting column and installed on the first supporting platform (315); the strap is arranged on the middle boss (34) of the lower bridge pedestal, one end of the strap (313) is in contact with the bridge deck steel plate (2), and the other end of the strap (313) is in contact with the earth slope filling body (317); the connecting piece is arranged as an elastic component (33); The earth slope filling body (317) is arranged in a triangular structure, extending to the bottom of the foundation pit, and the inclination angle of its waist is consistent with the inclination angle of the bridge deck steel plate (2); When the vehicle moves to the ramp on the earth slope filling body, the load of the ramp is transmitted to the supporting steel plate through the ramp, and the elastic component of the connecting piece is used to reduce shock and reset, so as to relieve the vehicle from the ramp. When the vehicle moves to the bridge deck steel plate, the load is pressed on the supporting steel plate of the first supporting platform, so that the elastic component (33) and the ramp are reset; The upper abutment (32) comprises an upper abutment seat (321), a sliding support (322) and a pre-buried inclined steel plate (323); a pre-buried inclined steel plate (323) is provided on the upper abutment, and the pre-buried inclined steel plate (323) and the truss beam (1) are connected via the sliding support; The sliding support (322) comprises a sliding shoe (3221) and a spherical support (3222), wherein the sliding shoe (3221) is arranged on the embedded inclined steel plate (323); stop blocks (324) are arranged at the upper and lower ends of the embedded inclined steel plate (323); one end of the sliding shoe (3221) is provided with a groove matched with the spherical support (3222), and the other end is provided with a plurality of contact sliding bars (325), wherein the contact sliding bars (325) are provided with a plurality of contact sliding bars (325) and a plurality of ... ) is in contact with the truss beam (1), the spherical support (3222) includes a hemispherical pendulum (3223) and a fixed structure (3224), the fixed structure connects the hemispherical pendulum (3223) to the truss beam, the inner wall of the groove of the sliding shoe is set as a concave spherical surface, the hemispherical pendulum (3223) is a convex spherical surface, the hemispherical pendulum is set to rotate relative to the concave spherical surface of the sliding shoe, and the lower surface of the hemispherical pendulum and the inner wall of the groove are both provided with a polytetrafluoroethylene layer.

2. The abutment of a steel trestle according to claim 1, characterized in that: A shock absorbing mechanism (3241) is arranged on the inner side of the stop block (324), and the shock absorbing mechanism is one of rubber, spring and hydraulic support.

3. The abutment of a steel trestle according to claim 1, characterized in that: The elastic component (33) includes a plurality of groups of springs, both ends of which are provided with hooks (331), and the two ends of the hooks are respectively hung in holes at the ends of the supporting steel plate and the strapping plate to form an elastic connection between the supporting steel plate and the strapping plate.

4. The abutment of a steel trestle according to claim 1, characterized in that: When the tires of a moving vehicle touch the steel plate, force is transmitted from the upper bridge deck steel plate to the bottom earth slope, where a vertical shock-absorbing layer is arranged.

5. The abutment of a steel trestle according to claim 2, characterized in that: The lower bridge pedestal (311) is cast simultaneously with the bottom plate structure, and the joints between the supporting steel plate and the truss beam are welded by limited position welding.

6. A method for constructing a steel trestle abutment according to any one of claims 1 to 5, characterized in that: Step (I): Preparation work, construct the foundation pit floor in the completed foundation pit, and construct the main structure of the steel trestle including steel columns and truss beams, set up the bridge deck steel plate on the truss beam, install the bridge deck steel plate and ancillary facilities, install the transverse distribution beams on the truss beams in sequence and install the bridge deck steel plate on them, set up the sidewalk and guardrails after installing the bridge deck steel plate, and finally backfill and harden the bottom soil slope; Step (ii): when installing the truss beam, first set up the middle truss beam and then install the truss beams on both sides. When installing the truss beams on both sides, first construct the lower truss beam and then construct the upper truss beam. When constructing the lower truss beam, the lower bridge pedestal and the bottom plate structure are cast at the same time, and the support steel plate and the truss beam are connected by limited welding; wherein the lower bridge pedestal is a T-shaped structure, which is set as a structure of support platforms on both sides and a middle boss; the support steel plate is set on the first support platform on one side of the T-shaped structure, and a soil slope filling body is set on the second support platform on the other side of the T-shaped structure, the support steel plate is inclined, and one end of the truss beam of the steel trestle is set on the support steel plate; connect the installation hole and the connecting column, and set an inclined rubber between the support steel plate and the first support platform, so that the truss beam and the first support platform form a buffer connection; then install the take-up plate, which is set on the middle boss of the lower bridge pedestal, and one end of the take-up plate is in contact with the bridge deck steel plate, and the other end of the take-up plate is in contact with the soil slope filling body; Installing an elastic component, the elastic component includes multiple groups of springs, and hooks are arranged at both ends of the springs. The two ends of the hooks are respectively hung in the holes at the ends of the supporting steel plate and the strapping plate to form an elastic connection between the supporting steel plate and the strapping plate; Step (iii): earth slope filling, the earth slope filling body is set to a triangular structure, extending to the bottom of the foundation pit, and the inclination angle of its waist is consistent with the inclination angle of the bridge deck steel plate; the vehicle walks to the scaffolding on the earth slope filling body, the load of the scaffolding is transmitted to the supporting steel plate through the scaffolding, and the elastic component of the connecting piece is used to reduce shock and reset, so as to relieve the vehicle springboard, and when the vehicle walks to the bridge deck steel plate, the load is pressed on the supporting steel plate of the first supporting platform, so that the elastic component and the scaffolding are reset; Step (four): construct the upper truss beam and sliding bearing, set a pre-embedded inclined steel plate on the upper abutment and then set the sliding shoe on the pre-embedded inclined steel plate; set a groove for the spherical bearing at one end of the sliding shoe, and set a plurality of contact sliding strips at one end, the contact sliding strips are in contact and connected with the truss beam, so that the contact surface of the sliding shoe is spherical contact at one end and plane contact at the other end, so as to ensure the force transmission in the two working conditions of rotation and translation.

7. The method for constructing a steel trestle abutment according to claim 6, characterized in that: The soil slope comprises a vertical shock-absorbing layer, wherein the vertical shock-absorbing layer comprises a concrete cushion layer (80) at the bottom and connected to the foundation pit bottom plate, a gravel layer (81) is arranged on the cushion layer, a medium sand particle layer (82) is filled on the gravel layer and compacted, and after compaction, a rubber particle layer (83) is laid on the medium sand particle layer, and a clay layer (84) is arranged on the rubber particle layer, and the clay layer is in contact with the slab.

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