CN113123218A - Multistage lateral limiting device suitable for bent and inclined bridge - Google Patents

Abstract

A multi-stage lateral limiting device suitable for a curved bridge and an inclined bridge is characterized in that a limiting steel box is connected to the bottom of a beam body of a main beam, and a concrete stop block and a guide steel plate are connected to a cap beam or a bridge pier of a bridge abutment; a steel support piece and a steel baffle plate are arranged between the concrete stop block and the limiting steel box, and the tetrafluoroethylene sliding plate is fixed in front of the steel baffle plate and is in contact with the limiting steel box; the steel support piece is connected with the back of the steel baffle plate and is in piston type sliding connection with the steel shell, and the rear end of the steel shell is connected with the concrete stop block; a first limiting spring and a second limiting spring are arranged between the steel supporting piece and the front wall and the rear wall in the cavity of the steel shell; the steel sliding bottom plate is connected to the steel baffle bottom, and the steel sliding bottom plate is placed and is connected with pre-buried bottom plate through fixing bolt in the spout of direction steel sheet, and the direction steel sheet extends to the concrete dog, the steel baffle with connect the stiffening plate between the steel sliding bottom plate. The invention realizes displacement control of the bent bridge and the inclined bridge through multi-stage limiting measures, and can limit the displacement of the bridge under normal use condition and earthquake action in a grading way.

Description

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

technical field

The invention relates to the technical field of civil engineering, is suitable for bridge limit, especially suitable for curved and inclined bridges, and specifically provides a multi-stage lateral limit device suitable for curved and inclined bridges

Background technique

In the design of municipal roads and bridges, the bridges are often curved bridges and inclined bridges due to the alignment requirements of the roads and the alignment of the roads. Due to their special structural forms, curved and inclined bridges will rotate around the piers (abutments) and displacements in the transverse bridge direction under the action of temperature force, vehicle braking force and other longitudinal bridge direction horizontal forces. If the lateral direction is not restricted, With the development of time, the lateral deviation of the bridge beam body, that is, the phenomenon of "climbing", affects the use of the bridge and the safety of the overall structure.

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 alignment. However, under the action of seismic load, the rigid block will completely transmit the seismic force of the beam body to the pier or abutment, so the seismic requirements for the substructure such as the pier and the pile foundation are also stricter, especially under the action of E2 earthquake, the substructure Design brings great difficulties.

Curved and inclined bridges have lateral displacement and rotation trends under the action of temperature and braking force. If the beam body is displaced, it will affect the normal use of the bridge and must be limited. Through analysis, the beam itself and the lower part can bear the local load brought by the rigid limit. However, for the occasional earthquake action, especially the E2 action, the rigid limit measures will cause the structure to be greatly stressed, and even cause local damage to the beam body in severe cases, and the substructure is also damaged due to the huge horizontal force. Therefore, the present invention aims to limit the lateral displacement of curved and inclined bridge bodies under the action of temperature force, braking force and E1 earthquake through multi-level elastic limiting measures, so as to ensure the normal use of bridges under normal circumstances, and in rare cases Under the action of the strong earthquake E2, the lateral support can be adjusted to a relatively weak limit effect through measures to dissipate the seismic action, and the concept of multi-channel fortification against earthquakes can be implemented to protect the beam body and the substructure.

SUMMARY OF THE INVENTION

The invention provides a multi-level lateral limiting device suitable for curved and inclined bridges. The multi-level limiting device installed on the bridge abutment cap beam (or middle pier) can be classified into grades through multiple different limiting channels. The purpose is to not only satisfy the free expansion and contraction of the bridge along the bridge direction for temperature and braking force under normal use conditions, but also to limit the lateral displacement, and also to be able to meet the requirements of rare and strong Under the action of earthquake E2, the shearing of the anti-shearing sacrificial members of the anti-seismic facilities can produce a relatively weak limiting effect on the beam body and then dissipate the seismic action, so as to protect the beam body and the substructure; it is necessary to solve the problem of limiting bending , The support of the inclined bridge body under the action of temperature force and braking force and the lateral displacement of the E1 earthquake, and the technical problem that the support will not damage the substructure such as the pier and the pile foundation under the action of the rare strong earthquake E2 earthquake.

The technical scheme of the present invention is as follows:

A multi-level lateral limiting device suitable for curved and inclined bridges, comprising a limiting steel box, a steel baffle, a steel support, and a concrete stop;

The limit steel box is fixedly connected at the bottom of the girder body of the main beam, and the concrete block and the guide steel plate are fixedly connected to the cap beam or the bridge pier of the bridge abutment;

A steel support and a steel baffle are arranged between the concrete block and the limit steel box, and the vertically arranged steel baffle and the limit steel box are in contact with each other through a tetrafluoroethylene sliding plate; The tetrafluoroethylene sliding 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 horizontally arranged rod body that is fixedly connected to a vertically arranged support plate and a piston plate. , the piston plate is placed in the cavity of the horizontally arranged steel casing and is connected with it in a piston-type sliding manner, and the support plate of the steel support is outside the cavity of the steel casing and is fixedly connected behind the steel baffle; The rear end of the steel shell abuts on the concrete block and is fixedly connected with it; a limit spring is set between the rear end of the piston plate of the steel support and the rear wall in the cavity of the steel shell to expand A second limit spring is set between the front end of the piston plate and the front wall in the cavity of the steel shell to tighten, and the second limit spring is sleeved on the rod body of the steel support and is slidably connected; the The steel support is arranged horizontally with the first limit spring and the second limit spring;

The steel bottom plate includes a sliding bottom plate and a pre-embedded bottom plate; the pre-embedded bottom plate is pre-buried on the surface of the cap beam or the pier of the bridge abutment, and the guide steel plate is welded upright on both sides of the pre-embedded bottom plate and extends to the The concrete block is in contact with it; the surface of the embedded bottom plate is flush with the top surface of the cap beam in the guide steel plate to form the inner bottom surface of the chute, the guide steel plate is in contact with the surface of the embedded bottom plate and the inner bottom surface of the guide steel plate. The top surface of the hat beam together forms the chute;

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, and the steel sliding bottom plate is placed in the chute. The pre-embedded bottom plate is fixedly connected to the pre-embedded bottom plate through fixing bolts, the steel sliding bottom plate and the guide steel plate are in slidable contact, and the sliding direction in the chute is in contact with the steel support. move in the same direction.

Between the steel baffle and the limit steel box, a cantilevered horizontally arranged vertical limit steel plate is fixedly connected in front of the steel baffle.

The top of the limit steel box is provided with a beam bottom connecting steel plate and the bottom of the beam body of the main beam is fixedly connected, and the bottom of the limit steel box is provided with a steel box limit steel plate, which is connected between the beam bottom connecting steel plate and the steel box limit steel plate The vertical steel box side steel plate forms a cuboid frame; the beam bottom connecting steel plate and the steel box limit steel plate hang out of the steel box side steel plate; the steel baffle and the steel box behind the limit steel box; The side steel plates of the steel box are in contact with the clamped tetrafluoroethylene sliding plates; the overhanging ends of the limit steel plates of the steel box are located under the vertical limit steel plates (7) and staggered with each other.

The guide steel plate is located under the steel shell, and the rear end of the guide steel plate abuts against the concrete block.

The chute is arranged below the steel support, and the central axis of the chute and the central axis of the rod body of the steel support are in a vertical plane.

The elastic force of the first limit spring is not less than the elastic force of the second limit spring.

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

The concrete block is made by pouring synchronously with the construction of the cap beam.

The upper end of the pre-embedded anchor bolt is welded and connected to the bottom of the pre-embedded bottom plate, and the lower end is anchored in the cap beam, and is made by pouring synchronously with the construction of the cap beam.

The stiffening plate stands upright along the direction of the chute.

The technical effect of the present invention is as follows:

The invention realizes the displacement control of curved and inclined bridges through multi-level limiting measures, and can limit the displacement of the bridge under normal use and earthquake action by levels; and can provide the bridge with a certain self-recovery ability through the limiting spring. . The invention can well meet the multi-level limit requirements of curved and inclined bridges, ensure the safety of the bridge under normal use and earthquake action, and will not cause excessive load response of the lower structure of the bridge.

Description of drawings:

Fig. 1 is the overall structure schematic diagram of the present invention,

Fig. 2 is the partial enlarged schematic diagram of the present invention,

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

Description of drawing numbers:

Main beam 1, hat beam 2, limit steel box 3, steel baffle 4, embedded anchor bolt 5, tetrafluoroethylene slide plate 6, vertical limit steel plate 7, steel base plate 8, sliding base plate 81, embedded base 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, chute 131, fixing bolt 14, stiffening plate 15. Steel box side steel plate 16, beam bottom connecting steel plate 17, steel box limit steel plate 18, limit spring one 19, limit spring two 20

E1 earthquake refers to the earthquake action with a short return period of the engineering site, which is adopted in the first-stage seismic design;

E2 earthquake refers to the earthquake action with a long return period of the engineering site, which is used in the second stage seismic design; see "Code for Seismic Design of Highway Bridges" (JTG/T 2231-01-2020).

Detailed ways

The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings:

Referring to Figures 1, 2, and 3, a multi-stage lateral limiting device suitable for curved and inclined bridges of the present invention includes a limiting steel box 3, a steel baffle 4, a steel support 9, and a concrete stopper 12;

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

A steel support 9 and a steel baffle 4 are arranged between the concrete block 12 and the limit steel box 3 , and the vertically arranged steel baffle 4 and the limit steel box 3 pass through four corners. The fluoroethylene sliding plate 6 is in contact; the tetrafluoroethylene sliding 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 a horizontally arranged rod body 93 at both ends respectively The vertical support plate 91 and the piston plate 92 are fixedly connected, and the piston plate is placed in the cavity of the horizontally arranged steel casing 11 and is connected with it in a piston-type sliding manner. The support plate 91 of the steel support 9 is in the The steel casing 11 is outside the cavity and is fixedly connected to the back of the steel baffle 4; the rear end of the steel casing 11 is against the concrete block 12 and is fixedly connected to it; the piston plate of the steel support 9 A limit spring 19 is set between the rear end and the rear wall of the cavity of the steel shell 1 to tighten, and a limit spring 20 is set between the front end of the piston plate and the front wall of the cavity of the steel shell 1 When tensioned, the second limit spring 20 is sleeved on the rod body 93 of the steel support and is slidably connected; the steel support 9 is arranged horizontally with the first limit spring and the second limit spring;

The steel bottom plate 8 includes a sliding bottom plate 81 and a pre-embedded bottom plate 82; the pre-embedded bottom plate 82 is pre-buried on the surface of the cap beam 2 or the pier of the bridge abutment, and the guide steel plate 13 is welded upright on the two sides of the pre-embedded bottom plate. 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 to form the inner bottom surface of the chute 131, and the guide steel plate 13 and the The surface of the embedded bottom plate 82 and the top surface of the cap beam 2 in the guide steel plate 13 together form the chute 131;

The bottom of the steel baffle 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 4 and the steel sliding bottom plate 81 , and the steel sliding bottom plate 81 is placed on the The pre-embedded bottom plate 82 in the chute 131 is fixedly connected to the pre-embedded bottom plate 82 through the fixing bolts 14 , and the steel sliding bottom plate 81 is in slidable contact with the guide steel plate 13 . The sliding direction in the chute corresponds to the moving direction of the steel support 9 .

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

The top of the limit steel box 3 is provided with a beam bottom connecting steel plate 17 to be fixedly connected to the bottom of the beam body of the main beam 1, and a steel box limit steel plate 18 is arranged at the bottom, and the connecting steel plate 17 at the bottom of the beam is connected to the steel box limit. The vertical steel box side steel plates 16 are connected between the position steel plates 18 to form a cuboid frame; the beam bottom connecting steel plate 17 and the steel box limit steel plate 18 hang out of the steel box side steel plate 16; the steel block The plate 4 is in contact with the steel box lateral steel plate 16 behind the limit steel box 3 through the clamped tetrafluoroethylene sliding plate 6; the overhanging end of the steel box limit steel plate 18 is located in the vertical direction. The bottoms of the limiting steel plates 7 are staggered with each other.

The guide steel plate 13 is located under the steel casing 11 , and the rear end of the guide steel plate 13 abuts against the concrete block 12 .

The chute is arranged below the steel support, and the central axis of the chute and the central axis of the rod body of the steel support are in a vertical plane.

The elastic force of the first limit spring 19 is not less than the elastic force of the second limit spring 20 .

Under the action of the E1 earthquake, the fixing bolt 14 will not be sheared; under the action of the E2 earthquake, the fixing bolt 14 will be sheared.

The concrete block 12 is cast synchronously with the construction of the cap beam 2 .

The upper end of the pre-embedded anchor bolt 5 is welded and connected to the bottom of the pre-embedded bottom plate 82 , and the lower end is anchored in the cap beam 2 , and is made by pouring synchronously with the construction of the cap beam 2 .

The stiffening plate 15 is erected along the direction of the chute.

The tetrafluoroethylene sliding plate 6 is fixed on the steel baffle 4 and only keeps contact with the limit steel box 3; in this way, the tetrafluoroethylene sliding plate 6 can not only provide a buffer for the collision between the limit steel box 3 and the steel baffle 4, but also The displacement along the bridge direction of the main girder 1 under normal use will not be restricted, and the present invention is not limited to the use of tetrafluoroethylene sliding plates, and sliding plates of other materials with equivalent functions can also be used.

The vertical limit steel plate 7 and the overhanging section of the steel box limit steel plate 18 arranged staggeredly at the bottom together form the vertical limit of the bridge.

The tetrafluoroethylene plate 6 provides a collision buffer between the steel box and the steel baffle in the transverse bridge direction; since the tetrafluoroethylene plate 6 is not connected with the limit steel box 3, the displacement of the bridge along the longitudinal bridge direction is also guaranteed. ability. When the beam body is displaced laterally, firstly, the rigidity of the steel baffle 4 and the stiffening plate 15 is used to provide the first-level lateral limit for the beam body.

The steel support 9 and the limit spring 1 19 constitute a second-level limit. As the displacement of the beam body increases, the lateral limit force provided by the limit spring 1 gradually increases, and the lateral displacement of the bridge is realized. Grading control.

The outermost side of the bridge abutment still uses the traditional rigid concrete block 12 as the highest level limit measure to ensure that the bridge does not suffer from falling beams at all.

According to the existing design method, the present invention can design the specific stiffness of the limit facility according to different bending and inclined bridge angles and the corresponding ground motion classification; it mainly includes the maximum shear bearing capacity of the fixing bolt 14, the specific stiffness of the limit spring, The stiffness of the limit spring is mainly considered to ensure that the displacement of the main beam under the action of the E2 earthquake meets the requirements of the code and the size of the cap beam, and it should ensure that the main beam does not rotate around the center of the beam when the lateral seismic displacement occurs, and the outermost rigid concrete Structural dimensions and reinforcement of the stopper.

The installation steps of the present invention:

(1) The concrete block 12 is poured synchronously with the construction of the cap beam 2; the pre-embedded base plate 82 and the pre-embedded anchor bolts 5 in the steel base plate 8 are carried out synchronously with the construction of the cap beam 2, and it should be ensured that the pre-embedded base plate 82 and the embedded The anchor bolts 5 are firmly installed in the hat beam 2 .

(2) Then, the sliding bottom plate 81 is fixed on the embedded steel plate 82 by the fixing bolts 14, and the guide steel plate 13 is welded on the embedded steel plate.

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

(4) The installation of the main beam is completed, and a temporary rubber plate can be arranged on the top surface of the hat beam 2 to serve as a temporary support for the limit steel box 3 and the main beam 1. During the installation of the main beam, it should be ensured that the relative position of the limit steel box 3 and the steel base plate 8 is accurate, so as to reduce the adjustment work in the later stage.

(5) Weld the steel baffle plate 4 and the stiffening plate 15 on the sliding bottom plate 81 , and the vertical limit steel plate 7 and the tetrafluoroethylene sliding plate 6 are also welded to the steel baffle plate 4 together. If the relative positional deviation of the limiting steel box 3 and the steel baffle 4 occurs during the installation process, it can be adjusted by adjusting the thickness of the tetrafluoroethylene sliding plate 6 .

(6) After the steel support 9 is assembled with the limit spring one 19, the limit spring two 20 and the steel shell 11, it is installed between the steel baffle 4 and the concrete block 12; wherein, the support plate 91 and the steel baffle 4. Fixed connection, the rear wall of the steel shell 11 is fixedly connected with the concrete block 12.

(7) After completing the above installation steps and confirming that the relative positions of the components are accurate and the connection is firm, the temporary rubber plate is removed, and the installation of the present invention is completed.

The working principle of the present invention:

According to the specific structural forms of different curved and inclined bridges, 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, and compare it with the lateral horizontal force generated under the action of the E1 earthquake. , select the larger value of the two to design the fixing bolt 14 to ensure that the fixing bolt 14 will not be sheared under the combined action of the E1 earthquake and the combined action of the normal temperature force and the vehicle braking force.

When the curved or inclined bridge rotates or the transverse bridge is displaced under the action of temperature force, automobile braking force, and E1 seismic force, the limit steel box 3 installed at the bottom of the beam will be connected with the tetrafluoroethylene plate 6 and the steel baffle. 4 collides, at this time, the beam body displacement is limited by the steel baffle 4, the stiffening plate 15 and the anchor bolt 14, and the anchor bolt 5 is not damaged by shearing.

Under the action of the E2 earthquake, the anchor bolts 14 are sheared, resulting in the lateral movement of the steel baffle 4, the sliding bottom plate 81 and the stiffening plate 15 under the restriction of the guide steel plate 13, causing the displacement of the steel support 9 and making the limit One side of the spring is compressed and the second side of the limit spring is pulled, and the first and second limit springs will also generate corresponding reverse forces to realize the bridge limit function. Based on the horizontal force generated by the E2 earthquake, the displacement limit of the main beam and the size requirements of the cap beam 2 specified in the code, the minimum stiffness values of the limit spring 1 and the limit spring 2 can be calculated to ensure the displacement of the main beam under the E2 earthquake. within the controllable range. At the same time, due to the deformation of the limit spring in the process, when the earthquake is over, it can also provide a self-resetting restoring force for the beam body to ensure the stability of the overall line shape of the bridge.

Under the action of extremely high-intensity earthquake, 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 body is completely blocked by concrete. The block 12 is limited; the size and reinforcement of the concrete block 12 should be able to meet the requirements of preventing the occurrence of falling beams.

Claims (10)

1. A multi-stage lateral limiting device suitable for curved and inclined bridges, characterized in that it comprises a limiting steel box (3), a steel baffle (4), a steel support (9), a concrete stop (3). 12); The limiting steel box (3) is fixedly connected to the bottom of the beam body of the main beam (1), and the concrete block (12) and the guide steel plate (13) are fixedly connected to the cap beam (2) or the pier of the bridge abutment; A steel support member (9) and a steel baffle (4) are arranged between the concrete block (12) and the limit steel box (3), and the vertically arranged steel baffle (4) is connected to the steel baffle (4). The limit steel boxes (3) are in contact with each other through a tetrafluoroethylene sliding plate (6); the tetrafluoroethylene sliding plate (6) is fixed on the front of the steel baffle plate (4), and only has keep in contact; the steel support (9) is composed of a horizontally arranged rod body (93) both ends fixedly connected to a vertically arranged support plate (91) and a piston plate (92), the piston plate is placed on a horizontal The steel casing (11) is arranged in the cavity and is connected in a piston-type sliding manner, and the support plate (91) of the steel support (9) is outside the cavity of the steel casing (11) and is connected with the steel baffle. (4) The rear is fixedly connected; the rear end of the steel shell (11) rests on the concrete block (12) and is fixedly connected with it; the rear end of the piston plate of the steel support (9) is connected to the steel A limit spring 1 (19) is arranged between the rear walls in the cavity of the casing (1) to tighten, and a limit spring 2 (19) is arranged between the front end of the piston plate and the front wall in the cavity of the steel casing (1). 20) Tighten, the second limit spring (20) is sleeved on the rod body (93) of the steel support and is slidably connected; the steel support (9) is connected with the first limit spring, the limit spring Two are set horizontally; The steel bottom plate (8) includes a sliding bottom plate (81) and a pre-embedded bottom plate (82); the pre-embedded bottom plate (82) is pre-embedded on the surface of the cap beam (2) or the pier of the bridge abutment, and the guide steel plate ( 13) Weld upright on both sides of the pre-embedded bottom plate and extend to the concrete block (12) in contact with it; the surface of the pre-embedded bottom plate (82) and the cap beam (2) in the guide steel plate (13) ) flush with the top surface together to form the inner bottom surface of the chute (131), the guide steel plate (13) and the surface of the pre-embedded bottom plate (82) and the top surface of the cap beam (2) in the guide steel plate (13) are common forming the chute (131); 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 pre-embedded bottom plate (82) in the chute (131) and is fixedly connected to the pre-embedded bottom plate (82) through the fixing bolts (14), so The steel sliding bottom plate (81) and the guide steel plate (13) are in slidable contact, and the sliding direction in the chute is consistent with the moving direction of the steel support (9). 2. A multi-stage lateral limiting device suitable for curved and inclined bridges according to claim 1, characterized in that, between the steel baffle (4) and the limiting steel box (3) In between, a cantilevered horizontally arranged vertical limit steel plate (7) is fixedly connected in front of the steel baffle plate (4). 3. A multi-stage lateral limiting device suitable for curved and inclined bridges as claimed in claim 2, wherein the top of the limiting steel box (3) is provided with a beam bottom connecting steel plate (17) and The bottom of the beam body of the main beam (1) is fixedly connected, the bottom of which is provided with a steel box limit steel plate (18), and the vertical connection between the beam bottom connecting steel plate (17) and the steel box limit steel plate (18) The steel box lateral steel plate (16) constitutes a cuboid frame; the beam bottom connecting steel plate (17) and the steel box limit steel plate (18) hang out of the steel box lateral steel plate (16); the steel block The plate (4) is in contact with the steel box lateral steel plate (16) behind the limit steel box (3) through the clamped tetrafluoroethylene sliding plate (6); the steel box limit steel plate ( 18) The overhanging ends are located under the vertical limiting steel plate (7) and staggered with each other. 4. A multi-stage lateral limiting device suitable for curved and inclined bridges according to claim 1, characterized in that the guide steel plate (13) is located under the steel casing (11), and the The rear end of the guide steel plate (13) abuts against the concrete block (12). 5 . The multi-stage lateral limiting device suitable for curved and inclined bridges according to claim 1 , wherein the chute is arranged below the steel support, and the middle of the chute is arranged. 6 . The axis is in one elevation with the central axis of the rod body of the steel support. 6. A multi-stage lateral limiting device suitable for curved and inclined bridges as claimed in claim 1, characterized in that the elastic force of the first limiting spring (19) is not less than that of the limiting spring Two (20) stretches. 7. A kind of multi-stage lateral limiting device suitable for curved and inclined bridges as claimed in claim 1, characterized in that, under the action of the E1 earthquake, the fixing bolts (14) do not shear; under the action of the E2 earthquake , the fixing bolt (14) will be sheared. 8. A multi-stage lateral limiting device suitable for curved and inclined bridges as claimed in claim 1, characterized in that, the concrete block (12) is cast synchronously with the construction of the cap beam (2). to make. 9. A multi-stage lateral limiting device suitable for curved and inclined bridges according to claim 1, characterized in that 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 hat beam (2), and is made by pouring synchronously with the construction of the hat beam (2). 10 . The multi-stage lateral limiting device suitable for curved and inclined bridges according to claim 1 , wherein the stiffening plate ( 15 ) is erected along the direction of the chute. 11 .

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