A multi-stage lateral limit device suitable for curved and inclined bridges

Abstract

A multi-stage lateral limit device suitable for curved and oblique bridges, wherein a limit steel box is connected to the bottom of the beam body of the main beam, and a concrete stopper and a guide steel plate are connected to the cap beam or pier of the abutment; a steel support and a steel stopper are arranged between the concrete stopper and the limit steel box, and a tetrafluoroethylene slide plate is fixed to the front of the steel stopper and contacts the limit steel box; the steel support is connected to the back of the steel stopper and is piston-slidingly connected to the steel shell, and the rear end of the steel shell is connected to the concrete stopper; one and two limit springs are arranged between the steel support and the front and rear walls in the cavity of the steel shell; the bottom of the steel stopper is connected to a steel sliding bottom plate, which is placed in the slide groove of the guide steel plate and connected to the embedded bottom plate by fixing bolts, and the guide steel plate extends to the concrete stopper, and a stiffening plate is connected between the steel stopper and the steel sliding bottom plate. The present invention realizes the displacement control of curved and oblique bridges through multi-stage limit measures, and can limit the displacement of bridges in normal use and under earthquake action in different levels.

Description

Technical Field

[0001] The present invention relates to the field of civil engineering technology, and is applicable to bridge limiting, especially to curved and inclined bridges. Specifically, a multi-stage lateral limiting device applicable to curved and inclined bridges is provided. Background Art

[0002] In the design of municipal road bridges, the bridges are often curved and inclined due to the requirements of the road's linear shape and the direction of the road's linear shape. Due to their special structural form, curved and inclined bridges will rotate around the bridge piers (abutments) and move in the transverse direction under the action of longitudinal horizontal forces such as temperature force and vehicle braking force. If the lateral direction is not restricted, the bridge beam will deviate laterally over time, which is the "creep" phenomenon, affecting the use of the bridge and the safety of the overall structure.

[0003] At present, rigid concrete blocks are often used in the design of curved and inclined bridges to completely limit the lateral displacement of the bridge to ensure the stability of the bridge line. However, under the action of earthquake loads, the rigid blocks will completely transfer the earthquake force of the beam to the piers or abutments, so the seismic requirements for the lower structures such as piers and pile foundations are also more stringent, especially under the action of E2 earthquakes, which brings great difficulties to the design of the lower structure.

[0004] Curved and inclined bridges have a tendency to lateral displacement and rotation under the action of temperature and braking force. If the displacement of the beam body occurs, it will affect the normal use of the bridge and must be limited. Through analysis, the beam body itself and the lower part can withstand the local load caused by rigid limiting. However, for accidental earthquakes, especially E2 effects, the rigid limiting measures cause the structure to be subjected to greater forces. In severe cases, it may even cause local damage to the beam body, and the lower structure is also damaged by the huge horizontal force. Therefore, the present invention aims to use multi-stage elastic limiting measures to limit the lateral displacement of the curved and inclined bridge body under the action of temperature force, braking force and E1 earthquake, thereby ensuring the normal use of the bridge under normal circumstances. Under the action of rare strong earthquakes such as E2 earthquakes, the lateral support can be adjusted to a relatively weak limiting effect through measures to dissipate the earthquake effect, implement the concept of multiple earthquake-resistant defenses, and achieve the effect of protecting the beam body and the lower structure. Summary of the invention

[0005] The present invention provides a multi-stage lateral limit device suitable for curved and inclined bridges. The multi-stage limit device is installed on the abutment cap beam (or middle pier). The lateral displacement of the curved and inclined bridge is limited by a plurality of different limit levels. The purpose is to meet the free expansion and contraction of the bridge along the bridge direction under normal use due to temperature and braking force, and limit the lateral displacement at the same time. It can also produce a relatively weak limiting effect on the beam body under the action of a rare strong earthquake E2 earthquake through the shearing of the shear-resistant sacrificial components of the seismic facilities, thereby dissipating the earthquake effect, thereby protecting the beam body and the lower structure; it is necessary to solve the support problem of limiting the lateral displacement of the curved and inclined bridge body under the action of temperature force, braking force and E1 earthquake, and to solve the technical problem that the support does not damage the lower structure such as piers and pile foundations under the action of a rare strong earthquake E2 earthquake.

[0006] The technical solution of the present invention is as follows:

[0007] A multi-stage lateral limit device suitable for curved and inclined bridges, comprising a limit steel box, a steel baffle, a steel support, and a concrete baffle;

[0008] The limit steel box is fixedly connected to the bottom of the main beam, and the concrete stopper and the guide steel plate are fixedly connected to the cap beam or pier of the abutment;

[0009] A steel support and a steel baffle are arranged between the concrete stopper and the limit steel box, and the vertically arranged steel baffle is in contact with the limit steel box through a tetrafluoroethylene slide plate; the tetrafluoroethylene slide plate is fixed on the front of the steel baffle and only keeps contact with the limit steel box; the steel support is composed of a support plate and a piston plate respectively fixedly connected to the two ends of a horizontally arranged rod body, the piston plate is placed in the cavity of a horizontally arranged steel shell and is connected to it in a piston-like sliding manner, and the support plate of the steel support is outside the cavity of the steel shell and is fixedly connected to the back of the steel baffle; the rear end of the steel shell rests on the concrete stopper and is fixedly connected to it; a limit spring 1 is arranged between the rear end of the piston plate of the steel support and the rear wall in the cavity of the steel shell to tighten, and a limit spring 2 is arranged between the front end of the piston plate and the front wall in the cavity of the steel shell to tighten, and the limit spring 2 is sleeved on the rod body of the steel support and is slidably connected; the steel support and the limit spring 1 and limit spring 2 are arranged horizontally;

[0010] The steel bottom plate includes a sliding bottom plate and an embedded bottom plate; the embedded bottom plate is embedded in the cap beam or pier surface of the abutment, the guide steel plate is welded upright on both sides of the embedded bottom plate and extends to the concrete block to contact it; the surface of the embedded bottom plate is flush with the top surface of the cap beam in the guide steel plate and together constitutes the bottom surface of the chute, and the guide steel plate, the surface of the embedded bottom plate and the top surface of the cap beam in the guide steel plate together constitute the chute;

[0011] The bottom of the steel baffle is fixedly connected to a horizontally arranged steel sliding bottom plate, and the stiffening plate is fixedly connected between the steel baffle and the steel sliding bottom plate. The steel sliding bottom plate is placed on the embedded bottom plate in the slide groove and is fixedly connected to the embedded bottom plate by fixing bolts. The steel sliding bottom plate is in slidable contact with the guide steel plate, and the sliding direction in the slide groove is consistent with the moving direction of the steel support.

[0012] Between the steel baffle and the limiting steel box, a cantilevered horizontally arranged vertical limiting steel plate is fixedly connected to the front of the steel baffle.

[0013] A beam bottom connecting steel plate is arranged on the top of the limiting steel box and is fixedly connected to the bottom of the beam body of the main beam, and a steel box limiting steel plate is arranged at the bottom thereof; a vertical steel box lateral steel plate is connected between the beam bottom connecting steel plate and the steel box limiting steel plate to form a rectangular parallelepiped frame; the beam bottom connecting steel plate and the steel box limiting steel plate are suspended outside the steel box lateral steel plate; the steel baffle plate is in contact with the steel box lateral steel plate behind the limiting steel box through the clamped tetrafluoroethylene sliding plate; the suspended ends of the steel box limiting steel plates are located below the vertical limiting steel plates (7) and are interlaced with each other.

[0014] The guide steel plate is located below the steel shell, and the rear end of the guide steel plate abuts against a concrete stopper.

[0015] The slide groove is arranged below the steel support member, and the central axis of the slide groove and the central axis of the rod body of the steel support member are in the same vertical plane.

[0016] The elastic force of the limit spring 1 is not less than the elastic force of the limit spring 2.

[0017] Under the action of E1 earthquake, the fixing bolts will not be sheared; under the action of E2 earthquake, the fixing bolts will be sheared.

[0018] The concrete stopper is cast and manufactured synchronously with the construction of the cap beam.

[0019] The upper end of the embedded anchor bolt is welded to the bottom of the embedded base plate, and the lower end is anchored in the cap beam, and is cast synchronously with the construction of the cap beam.

[0020] The stiffening plate stands upright along the direction of the slide groove.

[0021] The technical effects of the present invention are as follows:

[0022] The present invention realizes displacement control of curved and skew bridges through multi-level limiting measures, and can limit the displacement of bridges in normal use and under earthquake action in different levels; and can provide a certain self-recovery ability for bridges through limiting springs. The present invention can well meet the requirements of multi-level limiting of curved and skew bridges, ensure the safety of bridges under normal use and earthquake action, and will not cause excessive load response of the bridge substructure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention,

[0024] Figure 2 It is a partial enlarged schematic diagram of the present invention,

[0025] Figure 3 is a partial top view of the present invention,

[0026] Description of the accompanying drawings:

[0027] Main beam 1, cap beam 2, limit steel box 3, steel baffle 4, embedded anchor bolt 5, tetrafluoroethylene slide plate 6, vertical limit steel plate 7, steel bottom plate 8, sliding bottom plate 81, embedded bottom plate 82, steel support 9, support plate 91, piston plate 92 (please see the red number marked in the figure), rod body 93, steel shell 11, concrete block 12, guide steel plate 13, slide 131, fixing bolt 14, stiffening plate 15, steel box lateral steel plate 16, beam bottom connecting steel plate 17, steel box limit steel plate 18, limit spring 1 19, limit spring 2 20

[0028] E1 earthquake refers to: earthquake action with a shorter recurrence period at the project site, which is adopted in the first stage of seismic design;

[0029] E2 earthquake refers to: earthquake action with a longer recurrence period at the project site, which is adopted in the second-stage seismic design; for details, see "Code for Seismic Design of Highway Bridges" (JTG / T 2231-01-2020). DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings:

[0031] See also Figure 1 , 2 As shown in FIG. 3 , a multi-stage lateral limiting device suitable for curved and inclined bridges of the present invention comprises a limiting steel box 3, a steel baffle 4, a steel support member 9, and a concrete baffle 12;

[0032] The limit steel box 3 is fixedly connected to the bottom of the beam body of the main beam 1, and the concrete stopper 12 and the guide steel plate 13 are fixedly connected to the cap beam 2 or the pier of the abutment;

[0033] A steel support 9 and a steel baffle 4 are arranged between the concrete baffle 12 and the limit steel box 3. The vertically arranged steel baffle 4 is in contact with the limit steel box 3 through a tetrafluoroethylene slide plate 6; the tetrafluoroethylene slide plate 6 is fixed on the front of the steel baffle 4 and only keeps contact with the limit steel box 3; the steel support 9 is composed of a support plate 91 and a piston plate 92 respectively fixedly connected to the two ends of a horizontally arranged rod body 93, and the piston plate is placed in the cavity of the horizontally arranged steel shell 11 and is connected to it in a piston-like sliding manner. The support of the steel support 9 The plate 91 is outside the cavity of the steel shell 11 and is fixedly connected to the back of the steel baffle plate 4; the rear end of the steel shell 11 rests on the concrete stopper 12 and is fixedly connected thereto; a limit spring 19 is arranged between the rear end of the piston plate of the steel support 9 and the rear wall in the cavity of the steel shell 1 for tensioning, and a limit spring 20 is arranged between the front end of the piston plate and the front wall in the cavity of the steel shell 1 for tensioning, and the limit spring 20 is sleeved on the rod body 93 of the steel support for sliding connection; the steel support 9 and the limit springs 1 and 2 are arranged horizontally;

[0034] The steel bottom plate 8 includes a sliding bottom plate 81 and an embedded bottom plate 82; the embedded bottom plate 82 is embedded in the cap beam 2 or the surface of the pier of the abutment, and the guide steel plate 13 is welded upright on both sides of the embedded bottom plate and extends to the concrete block 12 to contact it; the surface of the embedded bottom plate 82 is flush with the top surface of the cap beam 2 in the guide steel plate 13 and together constitutes the inner bottom surface of the slide groove 131, and the guide steel plate 13, the surface of the embedded bottom plate 82 and the top surface of the cap beam 2 in the guide steel plate 13 together constitute the slide groove 131;

[0035] The bottom of the steel baffle plate 4 is fixedly connected to a horizontally arranged steel sliding bottom plate 81, and the stiffening plate 15 is fixedly connected between the steel baffle plate 4 and the steel sliding bottom plate 81. The steel sliding bottom plate 81 is placed on the embedded bottom plate 82 in the slide groove 131 and is fixedly connected to the embedded bottom plate 82 by fixing bolts 14. The steel sliding bottom plate 81 is in slidable contact with the guide steel plate 13, and the sliding direction in the slide groove is consistent with the moving direction of the steel support 9.

[0036] Between the steel baffle plate 4 and the limiting steel box 3 , a cantilevered horizontally arranged vertical limiting steel plate 7 is fixedly connected in front of the steel baffle plate 4 .

[0037] A beam bottom connecting steel plate 17 is arranged on the top of the limiting steel box 3 and is fixedly connected to the bottom of the beam body of the main beam 1, and a steel box limiting steel plate 18 is arranged on the bottom thereof, and a vertical steel box lateral steel plate 16 is connected between the beam bottom connecting steel plate 17 and the steel box limiting steel plate 18 to form a rectangular parallelepiped frame; the beam bottom connecting steel plate 17 and the steel box limiting steel plate 18 are suspended outside the steel box lateral steel plate 16; the steel baffle plate 4 is in contact with the steel box lateral steel plate 16 behind the limiting steel box 3 through the clamped tetrafluoroethylene slide plate 6; the suspended ends of the steel box limiting steel plates 18 are located below the vertical limiting steel plates 7 and are interlaced with each other.

[0038] The guide steel plate 13 is located below the steel shell 11 , and the rear end of the guide steel plate 13 abuts against the concrete stopper 12 .

[0039] The slide groove is arranged below the steel support member, and the central axis of the slide groove and the central axis of the rod body of the steel support member are in the same vertical plane.

[0040] The elastic force of the limit spring 19 is not less than the elastic force of the limit spring 20.

[0041] Under the action of E1 earthquake, the fixing bolts 14 will not be sheared; under the action of E2 earthquake, the fixing bolts 14 will be sheared.

[0042] The concrete stopper 12 is cast and manufactured synchronously with the construction of the cap beam 2 .

[0043] The upper end of the embedded anchor bolt 5 is welded to the bottom of the embedded bottom plate 82 , and the lower end is anchored in the cap beam 2 , and is cast synchronously with the construction of the cap beam 2 .

[0044] The stiffening plate 15 stands upright along the direction of the slide groove.

[0045] The tetrafluoroethylene slide plate 6 is fixed on the steel baffle plate 4 and only maintains contact with the limiting steel box 3; in this way, the tetrafluoroethylene slide plate 6 can provide a buffering effect for the collision between the limiting steel box 3 and the steel baffle plate 4, and will not limit the longitudinal displacement of the main beam 1 under normal use. The present invention is not limited to the use of tetrafluoroethylene slide plates, and slide plates made of other materials with the same functions can also be used.

[0046] The vertical limit steel plate 7 and the overhanging section of the staggered steel box limit steel plate 18 at the bottom thereof together form the vertical limit of the bridge.

[0047] The tetrafluoroethylene plate 6 provides a collision buffer between the steel box and the steel baffle in the transverse direction; since the tetrafluoroethylene plate 6 is not connected to the limit steel box 3, the displacement capacity of the bridge in the longitudinal direction is also guaranteed. When the beam body is displaced transversely, the rigidity of the steel baffle 4 and the stiffening plate 15 is first used to provide the first level of transverse limitation for the beam body.

[0048] The steel support 9 and the limit spring 19 constitute the second-level limit. As the displacement of the beam increases, the lateral limit force provided by the limit spring 1 gradually increases, thereby realizing the graded control of the lateral displacement of the bridge.

[0049] The outermost side of the abutment still uses the traditional rigid concrete block 12 as the highest level of limiting measure to ensure that the bridge will not suffer any damage from falling beams.

[0050] The present invention can design the specific stiffness of the limiting facility according to the existing design method based on different curved and inclined bridge angles and corresponding earthquake motion classifications; it mainly includes the maximum shear bearing capacity of the fixing bolt 14 and the specific stiffness of the limiting spring. The stiffness of the limiting spring is mainly considered to ensure that the displacement of the main beam under the action of the E2 earthquake meets the specification requirements and the cap beam size requirements, and should ensure that the main beam does not rotate around the center of the beam when a lateral earthquake displacement occurs, as well as the structural size and reinforcement of the outermost rigid concrete block.

[0051] Installation steps of the present invention:

[0052] (1) The concrete block 12 is cast synchronously with the construction of the cap beam 2; the embedded base plate 82 and the embedded anchor bolts 5 in the steel base plate 8 are constructed synchronously with the construction of the cap beam 2, and it should be ensured that the embedded base plate 82 and the embedded anchor bolts 5 are firmly installed in the cap beam 2.

[0053] (2) Then, the sliding base plate 81 is fixed to the embedded steel plate 82 by means of fixing bolts 14, and the guide steel plate 13 is welded to the embedded steel plate.

[0054] (3) The steel box lateral steel plate 16 and the steel box limiting steel plate 18 are welded to form a limiting steel box 3, and fixed to the bottom of the main beam 1 through the beam bottom connecting steel plate 17.

[0055] (4) After the main beam installation is completed, a temporary rubber plate can be set on the top surface of the cap beam 2 to serve as a temporary support for the limit steel box 3 and the main beam 1. During the main beam installation process, the relative position of the limit steel box 3 and the steel bottom plate 8 should be ensured to be accurate to reduce the subsequent adjustment work.

[0056] (5) The steel baffle plate 4 and the stiffening plate 15 are welded to the sliding bottom plate 81, and the vertical limit steel plate 7 and the tetrafluoroethylene slide plate 6 are also welded to the steel baffle plate 4. If the relative position deviation between the limit steel box 3 and the steel baffle plate 4 occurs during the installation process, it can be adjusted by adjusting the thickness of the tetrafluoroethylene slide plate 6.

[0057] (6) After assembling the steel support member 9, the limit spring 19, the limit spring 20 and the steel shell 11, install them between the steel baffle plate 4 and the concrete baffle block 12; wherein, the support plate 91 is fixedly connected to the steel baffle plate 4, and the rear wall of the steel shell 11 is fixedly connected to the concrete baffle block 12.

[0058] (7) After completing the above installation steps and ensuring that the relative positions of the components are accurate and the connections are firm, remove the temporary rubber sheet and the installation of the present invention is complete.

[0059] Working principle of the present invention:

[0060] The present invention can analyze the horizontal force that may be generated under the combined action of temperature force and vehicle braking force according to the existing design method based on the specific structural forms of different curved and inclined bridges, and compare it with the lateral horizontal force generated under the action of E1 earthquake, and select the larger value of the two to design the fixing bolts 14, so as to ensure that the fixing bolts 14 are not sheared under the action of E1 earthquake and the combined action of normal temperature force and vehicle braking force.

[0061] When a curved or inclined bridge rotates or moves transversely under the action of temperature force, vehicle braking force, and E1 earthquake force, the limit steel box 3 installed at the bottom of the beam will collide with the tetrafluoroethylene plate 6 and the steel baffle 4. At this time, the steel baffle 4, the stiffening plate 15, and the anchor bolts 14 are used to limit the displacement of the beam and ensure that the anchor bolts 5 are not sheared.

[0062] Under the action of the E2 earthquake, the anchor bolts 14 are sheared, causing the steel baffle 4, the sliding bottom plate 81 and the stiffening plate 15 to move laterally under the restriction of the guide steel plate 13, causing the displacement of the steel support 9, and causing the limit spring one to be compressed on one side and the limit spring two to be pulled on one side, and the limit springs one and two will also generate corresponding reverse forces to realize the bridge limit function. Based on the horizontal force generated by the E2 earthquake and the main beam displacement limit and the size requirements of the cap beam 2 specified in the specification, the minimum stiffness values ​​of the limit springs one and two can be calculated to ensure that the displacement of the main beam under the E2 earthquake is within a controllable range. At the same time, since the limit springs are deformed in this process, after the earthquake ends, they can also provide a self-resetting restoring force for the beam body to restore and ensure the stability of the overall linear shape of the bridge.

[0063] Under the action of extremely high-intensity earthquakes, the anchor bolts 14 are sheared, and the limit spring 1 and the steel support 9 fail due to the extremely large horizontal seismic force. At this time, the transverse seismic displacement of the beam is completely limited by the concrete block 12; the size and reinforcement of the concrete block 12 should be able to meet the requirements of preventing the beam from falling.

Claims

1. A multi-stage lateral limit device suitable for curved and inclined bridges, characterized in that: It comprises a limit steel box (3), a steel baffle (4), a steel support member (9), and a concrete baffle (12); The limit steel box (3) is fixedly connected to the bottom of the beam body of the main beam (1), and the concrete stopper (12) and the guide steel plate (13) are fixedly connected to the cap beam (2) or the pier of the abutment; A steel support member (9) and a steel baffle (4) are arranged between the concrete baffle (12) and the limiting steel box (3); the vertically arranged steel baffle (4) is in contact with the limiting steel box (3) via a tetrafluoroethylene slide plate (6); the tetrafluoroethylene slide plate (6) is fixed on the front of the steel baffle (4) and only keeps contact with the limiting steel box (3); the steel support member (9) is composed of a support plate (91) and a piston plate (92) respectively fixedly connected to the two ends of a horizontally arranged rod body (93); the piston plate is placed in the cavity of the horizontally arranged steel shell (11) and is connected to it in a piston-like sliding manner; the steel support member (9) The support plate (91) is outside the cavity of the steel shell (11) and is fixedly connected to the rear of the steel baffle (4); the rear end of the steel shell (11) rests on the concrete baffle (12) and is fixedly connected thereto; a limit spring 1 (19) is arranged between the rear end of the piston plate of the steel support member (9) and the rear wall in the cavity of the steel shell (11) for tensioning, and a limit spring 2 (20) is arranged between the front end of the piston plate and the front wall in the cavity of the steel shell (11) for tensioning, and the limit spring 2 (20) is sleeved on the rod body (93) of the steel support member and is slidably connected; the steel support member (9) and the limit spring 1 and the limit spring 2 are arranged horizontally; The steel bottom plate (8) comprises a sliding bottom plate (81) and an embedded bottom plate (82); the embedded bottom plate (82) is embedded in the cap beam (2) or the surface of the pier of the abutment; the guide steel plate (13) is welded upright on both sides of the embedded bottom plate and extends to the concrete block (12) to contact it; the surface of the embedded bottom plate (82) is flush with the top surface of the cap beam (2) in the guide steel plate (13) and together constitutes the inner bottom surface of the slide groove (131); the guide steel plate (13) and the surface of the embedded bottom plate (82) and the top surface of the cap beam (2) in the guide steel plate (13) together constitute the slide groove (131); The bottom of the steel baffle (4) is fixedly connected to a horizontally arranged steel sliding bottom plate (81), and a stiffening plate (15) is fixedly connected between the steel baffle (4) and the steel sliding bottom plate (81); the steel sliding bottom plate (81) is placed on the embedded bottom plate (82) in the slide groove (131) and is fixedly connected to the embedded bottom plate (82) by fixing bolts (14); the steel sliding bottom plate (81) is in slidable contact with the guide steel plate (13); and the sliding direction in the slide groove is consistent with the moving direction of the steel support member (9); Between the steel baffle plate (4) and the limiting steel box (3), a cantilevered horizontally arranged vertical limiting steel plate (7) is fixedly connected to the front of the steel baffle plate (4); The guide steel plate (13) is located below the steel shell (11), and the rear end of the guide steel plate (13) abuts against the concrete stopper (12).

2. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: A beam bottom connecting steel plate (17) is arranged on the top of the limiting steel box (3) and is fixedly connected to the bottom of the beam body of the main beam (1); a steel box limiting steel plate (18) is arranged on the bottom thereof; a vertical steel box lateral steel plate (16) is connected between the beam bottom connecting steel plate (17) and the steel box limiting steel plate (18) to form a rectangular parallelepiped frame; the beam bottom connecting steel plate (17) and the steel box limiting steel plate (18) are suspended outside the steel box lateral steel plate (16); the steel baffle plate (4) and the steel box lateral steel plate (16) behind the limiting steel box (3) are in contact through the clamped tetrafluoroethylene slide plate (6); the suspended ends of the steel box limiting steel plates (18) are located below the vertical limiting steel plates (7) and are interlaced with each other.

3. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: The slide groove is arranged below the steel support member, and the central axis of the slide groove and the central axis of the rod body of the steel support member are in the same vertical plane.

4. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: The elastic force of the limit spring 1 (19) is not less than the elastic force of the limit spring 2 (20).

5. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: Under the action of an E1 earthquake, the fixing bolt (14) will not be sheared; under the action of an E2 earthquake, the fixing bolt (14) will be sheared.

6. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: The concrete stopper (12) is cast and manufactured synchronously with the construction of the cap beam (2).

7. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: The upper end of the embedded anchor bolt (5) is welded to the bottom of the embedded base plate (82), and the lower end is anchored in the cap beam (2), and is cast synchronously with the construction of the cap beam (2).

8. A multi-stage lateral limit device suitable for curved and inclined bridges as claimed in claim 1, characterized in that: The stiffening plate (15) stands upright along the direction of the slide groove.

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