CN113123218A - Multistage lateral limiting device suitable for bent and inclined bridge - Google Patents
Multistage lateral limiting device suitable for bent and inclined bridge Download PDFInfo
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- CN113123218A CN113123218A CN202110489330.1A CN202110489330A CN113123218A CN 113123218 A CN113123218 A CN 113123218A CN 202110489330 A CN202110489330 A CN 202110489330A CN 113123218 A CN113123218 A CN 113123218A
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- 230000000670 limiting effect Effects 0.000 title claims abstract description 129
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 280
- 239000010959 steel Substances 0.000 claims abstract description 280
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims description 7
- 239000003351 stiffener Substances 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 abstract description 22
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Bridges Or Land Bridges (AREA)
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
Technical Field
The invention relates to the technical field of civil engineering, is suitable for bridge limiting, is particularly suitable for bent and inclined bridges, and particularly provides a multistage lateral limiting device suitable for bent and inclined bridges
Background
In the design of municipal road bridges, the bridges are bent bridges and inclined bridges due to the linear requirement and the linear trend of roads. Due to the special structural form of the bent bridge and the inclined bridge, under the action of longitudinal bridge horizontal force such as temperature force, automobile braking force and the like, the bent bridge and the inclined bridge can rotate around a pier (abutment) and displace in the transverse bridge direction, if the lateral direction is not limited, the bridge body of the bridge deviates laterally along with the development of time, namely, the phenomenon of climbing and displacement is caused, and the use of the bridge and the safety of the whole structure are influenced.
At present, rigid concrete stoppers are mostly adopted in the design of bent and inclined bridges to completely limit the transverse displacement of the bridge, so that the linear stability of the bridge is ensured. However, under the action of earthquake load, the rigid stop block can completely transmit the earthquake force of the beam body to the bridge pier or the bridge abutment, so the earthquake resistance requirements of lower structures such as the bridge pier, the pile foundation and the like are stricter, and particularly under the action of an E2 earthquake, the design of the lower structures brings great difficulty.
The bent and inclined bridge beams have the transverse displacement and rotation tendency under the action of temperature and braking force, and the normal use of the bridge is influenced if the deflection of the beam body is generated, so that the limitation is required. Through analysis, the beam body and the lower part can bear local loads caused by rigid limit. However, for accidental earthquake action, particularly E2 action, the structure is stressed greatly due to the rigid limit measure, even the beam body is damaged locally when the structure is serious, and the lower structure is damaged due to huge horizontal force. Therefore, the invention aims to limit the lateral displacement of the bent and inclined bridge body under the action of temperature force, braking force and E1 earthquake by multi-stage elastic limiting measures, ensure the normal use of the bridge under the common condition, adjust the lateral support to be relatively weak limiting action under the action of E2 earthquake rarely encountered, further dissipate the earthquake action, carry out the idea of earthquake-resistant multi-channel fortification and achieve the effect of protecting the bridge body and the substructure.
Disclosure of Invention
The invention provides a multistage lateral limiting device suitable for a bent and inclined bridge, which is arranged on a bridge abutment cap beam (or a middle pier), and is used for limiting the lateral displacement of the bent and inclined bridge in a grading manner through a plurality of different limiting steps, so that the aim of the multistage lateral limiting device can be fulfilled for freely extending and retracting a bridge along the bridge direction for temperature and braking force under the normal use condition of the bridge and limiting the lateral displacement, and can also be fulfilled for generating relatively weak limiting action on a beam body to further dissipate the earthquake action through shearing of shearing-resistant sacrificial members of an earthquake-resistant facility under the action of rare strong earthquake E2 earthquake, thereby achieving the effect of protecting the beam body and a lower structure; the support method not only solves the support problem of limiting the lateral displacement of the bent and inclined bridge body under the action of temperature force, braking force and E1 earthquake, but also solves the technical problem that the support does not damage lower structures such as bridge piers, pile foundations and the like under the action of rare strong earthquake E2 earthquake.
The technical scheme of the invention is as follows:
a multi-stage lateral limiting device suitable for a bent or inclined bridge comprises a limiting steel box, a steel baffle, a steel supporting piece and a concrete stop block;
the bottom of the girder body of the main girder is fixedly connected with the limiting steel box, and a cap beam or a bridge pier of the bridge abutment is fixedly connected with a concrete stop block and a guide steel plate;
a steel support piece and a steel baffle plate are arranged between the concrete stop block and the limiting steel box, and the vertically arranged steel baffle plate is contacted with the limiting steel box through a tetrafluoroethylene sliding plate; the tetrafluoroethylene sliding plate is fixed on the front surface of the steel baffle plate and only keeps contact with the limiting steel box; the steel support piece is formed by fixedly connecting a supporting plate and a piston plate which are vertically arranged at two ends of a horizontally arranged rod body respectively, the piston plate is placed in a cavity of a horizontally arranged steel shell and is in piston type sliding connection with the cavity, and the supporting plate of the steel support piece is outside the cavity of the steel shell and is fixedly connected with the back of the steel baffle plate; the rear end of the steel shell is abutted against the concrete stop block and is fixedly connected with the concrete stop block; a first limiting spring is arranged between the rear end of the piston plate of the steel support piece and the rear wall in the cavity of the steel shell for tensioning, a second limiting spring is arranged between the front end of the piston plate and the front wall in the cavity of the steel shell for tensioning, and the second limiting spring is sleeved on a rod body of the steel support piece for sliding connection; the steel support piece is horizontally arranged with the first limiting spring and the second limiting spring;
the steel bottom plate comprises a sliding bottom plate and a pre-embedded bottom plate; the embedded bottom plate is embedded in the surface of a cap beam or a pier of the abutment, and the guide steel plates are vertically welded on two sides of the embedded bottom plate and extend to the concrete stop block to be in contact with the concrete stop block; 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 sliding 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 form the sliding chute;
the bottom of the steel baffle plate is fixedly connected with a horizontally arranged steel sliding bottom plate, the steel baffle plate is fixedly connected with the steel sliding bottom plate, the stiffening plate is fixedly connected between the steel baffle plate and the steel sliding bottom plate, the steel sliding bottom plate is placed on the embedded bottom plate in the sliding groove and is fixedly connected with the embedded bottom plate through a fixing bolt, the steel sliding bottom plate is in slidable contact with the guide steel plate, and the sliding direction in the sliding groove is consistent with the moving direction of the steel support piece.
The steel baffle plate is fixedly connected with a cantilever type vertical limiting steel plate which is horizontally arranged between the steel baffle plate and the limiting steel box.
The top of the limiting steel box is provided with a beam bottom connecting steel plate fixedly connected with the bottom of a beam body of the main beam, the bottom of the limiting steel box is provided with a steel box limiting steel plate, and 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 frame; the beam bottom connecting steel plate and the steel box limiting steel plate are hung outside the steel box lateral steel plate; the steel baffle plate is in contact with a steel box lateral steel plate behind the limiting steel box through the clamped tetrafluoroethylene sliding plate; the hanging ends of the steel box limiting steel plates are positioned below the vertical limiting steel plates (7) and are staggered with each other.
The guide steel plate is located steel shell below, just the guide steel plate rear end supports and leans on the concrete dog.
The spout sets up steel support piece's below, the axis of spout with steel support piece's body of rod axis is in a facade.
The elastic force of the first limiting spring is not less than that of the second limiting spring.
Under the action of E1 earthquake, the fixing bolt is not sheared; the fixing bolt is sheared under the action of E2 earthquake.
The concrete stop block is cast synchronously along with the construction of the cap beam.
The upper end of the embedded anchor bolt is connected with the bottom and the lower end of the embedded bottom plate in a welding mode and anchored in the cap beam, and the embedded anchor bolt is made by pouring synchronously along with the construction of the cap beam.
The stiffening plate is upright along the sliding groove direction.
The invention has the following technical effects:
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; and can provide certain self-recovery ability for the bridge through spacing spring. The invention can well meet the requirement of multistage limit of a bent bridge and an inclined bridge, ensure the safety of the bridge under the action of normal use and earthquake, and can not cause overlarge load response of the bridge lower structure.
Description of the drawings:
figure 1 is a schematic view of the overall structure of the present invention,
figure 2 is an enlarged partial schematic view of the present invention,
figure 3 is a partial top view of the present invention,
description of the figure numbering:
The E1 earthquake refers to: the earthquake action with short reappearance period of the engineering field is adopted in the first-stage earthquake-resistant design;
the E2 earthquake refers to: the earthquake action with longer reappearance period of the engineering field is adopted in the second-stage earthquake-resistant design; see the highway bridge earthquake-proof design Specification (JTG/T2231-01-2020).
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings:
referring to fig. 1, 2 and 3, the multi-stage lateral limiting device for a curved or skew bridge of the present invention comprises a limiting steel box 3, a steel baffle 4, a steel support member 9 and a concrete stop 12;
the bottom of the girder body of the main girder 1 is fixedly connected with the limiting steel box 3, and the cap beam 2 or the pier of the bridge abutment is fixedly connected with a concrete stop 12 and a guide steel plate 13;
a steel support piece 9 and a steel baffle plate 4 are arranged between the concrete stop block 12 and the limiting steel box 3, and the vertically arranged steel baffle plate 4 is contacted with the limiting steel box 3 through a tetrafluoroethylene sliding plate 6; the tetrafluoroethylene sliding plate 6 is fixed on the front surface of the steel baffle plate 4 and only keeps contact with the limiting steel box 3; the steel supporting piece 9 is formed by fixedly connecting a supporting plate 91 and a piston plate 92 which are vertically arranged at two ends of a horizontally arranged rod body 93 respectively, the piston plate is placed in a cavity of a horizontally arranged steel shell 11 and is in piston type sliding connection with the cavity, and the supporting plate 91 of the steel supporting piece 9 is outside the cavity of the steel shell 11 and is fixedly connected with the rear surface of the steel baffle 4; the rear end of the steel shell 11 leans against the concrete stop block 12 and is fixedly connected with the concrete stop block; a first limiting spring 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 1 for tensioning, a second limiting 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 second limiting spring 20 is sleeved on a rod body 93 of the steel support member for sliding connection; the steel support piece 9 is horizontally arranged with the first limiting spring and the second limiting spring;
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 pier surface of the abutment, and the guide steel plates 13 are vertically welded on the two sides of the embedded bottom plate and extend to the concrete stop block 12 to be in contact with the concrete stop block; 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 sliding chute 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 form the sliding chute 131;
the bottom of the steel baffle plate 4 is fixedly connected with a horizontally arranged steel sliding bottom plate 81, the steel baffle plate 4 and the steel sliding bottom plate 81 are fixedly connected with the stiffening plate 15, the steel sliding bottom plate 81 is placed on the embedded bottom plate 82 in the sliding groove 131 and is fixedly connected with the embedded bottom plate 82 through a fixing bolt 14, the steel sliding bottom plate 81 is in slidable contact with the guide steel plate 13, and the sliding direction in the sliding groove is consistent with the moving direction of the steel support member 9.
Between the steel baffle 4 and the limiting steel box 3, a cantilever type vertical limiting steel plate 7 is fixedly connected in front of the steel baffle 4.
The top of the limiting steel box 3 is provided with a beam bottom connecting steel plate 17 fixedly connected with the bottom of the beam body of the main beam 1, the bottom of the limiting steel box 3 is provided with a steel box limiting steel plate 18, 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 frame; the beam bottom connecting steel plate 17 and the steel box limiting steel plate 18 are hung outside the steel box lateral steel plate 16; the steel baffle 4 is in contact with a steel box lateral steel plate 16 behind the limiting steel box 3 through the clamped tetrafluoroethylene sliding plate 6; the hanging ends of the steel box limiting steel plates 18 are positioned below the vertical limiting steel plates 7 and are staggered with each other.
The guide steel plate 13 is positioned below the steel shell 11, and the rear end of the guide steel plate 13 abuts against the concrete stop block 12.
The spout sets up steel support piece's below, the axis of spout with steel support piece's body of rod axis is in a facade.
The elastic force of the first limiting spring 19 is not less than the elastic force of the second limiting spring 20.
Under the action of an E1 earthquake, the fixing bolt 14 is not sheared; the anchor bolt 14 will shear under the action of the E2 earthquake.
The concrete stop block 12 is cast synchronously with the construction of the cap beam 2.
The upper end of the embedded anchor bolt 5 is connected with the bottom of the embedded bottom plate 82 in a welding mode, the lower end of the embedded bottom plate is anchored in the cap beam 2, and the embedded anchor bolt is made by pouring synchronously along with the construction of the cap beam 2.
The stiffener 15 is erected in the direction of the chute.
The tetrafluoroethylene sliding plate 6 is fixed on the steel baffle plate 4 and only keeps contact with the limiting steel box 3; therefore, the tetrafluoroethylene sliding plate 6 can provide a buffer effect for the collision of the limiting steel box 3 and the steel baffle 4, and cannot limit the forward-bridge displacement of the main beam 1 under normal use.
The vertical limiting steel plate 7 and the suspension section of the steel box limiting steel plate 18 arranged at the bottom of the vertical limiting steel plate in a staggered mode form the vertical limiting of the bridge.
The tetrafluoroethylene plate 6 provides collision buffering between the steel box and the steel baffle plate in the transverse bridge direction; because the tetrafluoroethylene plate 6 is not connected with the limiting steel box 3, the displacement capability of the bridge along the longitudinal bridge direction is also ensured. When the beam body transversely displaces, the rigidity of the steel baffle 4 and the stiffening plate 15 is utilized to provide the first-stage transverse limiting for the beam body.
The steel support piece 9 and the first limiting spring 19 form second-stage limiting, and the lateral limiting force provided by the first limiting spring is gradually increased along with the increase of the displacement of the beam body, so that the hierarchical control of the transverse displacement of the bridge is realized.
The outermost side of the abutment still adopts the traditional rigid concrete block 12 as the highest level limiting measure to ensure that the bridge is not damaged by falling beams.
The invention can design the concrete rigidity of the limiting facility according to different bending and inclined bridge angles and corresponding earthquake motion classification according to the existing design method; the maximum shear-resistant bearing capacity of the fixing bolt 14 and the specific rigidity of the limiting spring are mainly included, the rigidity 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 standard requirement and the size requirement of the cap beam, the phenomenon of rotation around the center of the beam is avoided when the main beam generates transverse earthquake displacement, the structural size of the rigid concrete stop block at the outermost side, the reinforcing steel bars and the like are also ensured.
The method comprises the following installation steps:
(1) the concrete stop block 12 is synchronously poured along with the construction of the cap beam 2; the embedded bottom plate 82 and the embedded anchor bolt 5 in the steel bottom plate 8 are synchronously constructed along with the cap beam 2, and the embedded bottom plate 82 and the embedded anchor bolt 5 are firmly installed in the cap beam 2.
(2) Then, the sliding bottom plate 81 is fixed to the embedded steel plate 82 by the fixing bolts 14, and the guide steel plate 13 is welded to the embedded steel plate.
(3) And welding the steel box lateral steel plates 16 and the steel box limiting steel plates 18 to form a limiting steel box 3, and fixing the limiting steel box 3 at the bottom of the main beam 1 through a beam bottom connecting steel plate 17.
(4) And a temporary rubber plate can be arranged on the top surface of the cap beam 2 to be used as a temporary support for the limiting steel box 3 and the main beam 1. In the girder installation, should ensure that spacing steel box 3 is accurate with the relative position of steel bottom plate 8, reduce the adjustment work in later stage.
(5) The steel baffle plate 4 and the stiffening plate 15 are welded on the sliding bottom plate 81, and the vertical limiting steel plate 7 and the tetrafluoroethylene sliding plate 6 are also welded on the steel baffle plate 4. If the relative position deviation of the limiting steel box 3 and the steel baffle 4 occurs in the installation process, the thickness of the tetrafluoroethylene sliding plate 6 can be adjusted.
(6) After the steel support piece 9, the first limiting spring 19, the second limiting spring 20 and the steel shell 11 are assembled, the steel support piece is arranged between the steel baffle plate 4 and the concrete stop block 12; wherein, the supporting plate 91 is fixedly connected with the steel baffle 4, and the rear wall of the steel shell 11 is fixedly connected with the concrete stopper 12.
(7) And after the installation steps are completed, the relative positions of the components are determined to be accurate and the components are firmly connected, removing the temporary rubber plate, and finishing the installation.
The working principle of the invention is as follows:
according to the concrete structural forms of different bent and inclined bridges, the horizontal force possibly generated under the combined action of the temperature force and the automobile braking force can be analyzed according to the existing design method, and compared with the horizontal force generated under the action of the E1 earthquake, the larger value of the horizontal force and the horizontal force is selected to design the fixing bolt 14, so that the fixing bolt 14 is ensured not to be sheared under the action of the E1 earthquake and the combined action of the normal temperature force and the automobile braking force.
When the bent and inclined bridge rotates or moves transversely under the action of temperature force, automobile braking force and E1 earthquake force, the limiting steel box 3 arranged at the bottom of the beam collides with the tetrafluoroethylene plate 6 and the steel baffle plate 4, the displacement of the beam body is limited by the steel baffle plate 4, the stiffening plate 15 and the anchor bolt 14, and the anchor bolt 5 is prevented from being damaged by shearing.
Under the action of an E2 earthquake, the anchor bolts 14 are sheared, so that the steel baffle plate 4, the sliding bottom plate 81 and the stiffening plate 15 move laterally under the limitation of the guide steel plate 13, the displacement of the steel support member 9 is caused, one side of the limiting spring is pressed, one side of the limiting spring is pulled, and the other side of the limiting spring is pulled, and the first limiting spring and the second limiting spring generate corresponding reverse acting force to realize the limiting function of the bridge. Based on the horizontal force generated by the E2 earthquake, the main beam displacement limit value specified by the specification and the size requirement of the cap beam 2, the minimum rigidity values of the first limit spring and the second limit spring can be calculated to ensure that the main beam displacement is within a controllable range under the action of the E2 earthquake. Meanwhile, the limiting spring deforms in the process, so that after the earthquake is finished, a self-resetting restoring force can be provided for the beam body to restore, and the stability of the whole line type of the bridge is guaranteed.
Under the action of an extremely high-intensity earthquake, the anchor bolt 14 is sheared, the limiting spring I and the steel support piece 9 lose effectiveness due to the action of the extremely high horizontal earthquake force, and the transverse bridge earthquake displacement of the beam body is completely limited by the concrete stop 12; the concrete stop blocks 12 are sized and reinforced to meet the requirements of preventing beam drop.
Claims (10)
1. A multi-stage lateral limiting device suitable for bent and inclined bridges is characterized by comprising a limiting steel box (3), a steel baffle plate (4), a steel supporting piece (9) and a concrete stop block (12);
the limiting steel box (3) is fixedly connected to the bottom of the girder body of the main girder (1), and a concrete stop block (12) and a guide steel plate (13) are fixedly connected to the cap beam (2) or the pier of the abutment;
a steel support piece (9) and a steel baffle plate (4) are arranged between the concrete stop block (12) and the limiting steel box (3), and the vertically arranged steel baffle plate (4) is contacted with the limiting steel box (3) through a tetrafluoroethylene sliding plate (6); the tetrafluoroethylene sliding plate (6) is fixed on the front surface of the steel baffle plate (4) and only keeps contact with the limiting steel box (3); the steel supporting piece (9) is formed by fixedly connecting a supporting plate (91) and a piston plate (92) which are vertically arranged at two ends of a horizontally arranged rod body (93) respectively, the piston plate is placed in a cavity of a horizontally arranged steel shell (11) and is in piston type sliding connection with the cavity, and the supporting plate (91) of the steel supporting piece (9) is outside the cavity of the steel shell (11) and is fixedly connected with the rear surface of the steel baffle plate (4); the rear end of the steel shell (11) leans against the concrete stop block (12) and is fixedly connected with the concrete stop block; a first limiting spring (19) is arranged between the rear end of a piston plate of the steel support piece (9) and the rear wall in the cavity of the steel shell (1) for tensioning, a second limiting 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 second limiting spring (20) is sleeved on a rod body (93) of the steel support piece and is in sliding connection with the rod body; the steel supporting piece (9) is horizontally arranged with the first limiting spring and the second limiting spring;
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 surface of a cap beam (2) or a pier of the abutment in an embedded mode, and the guide steel plates (13) are vertically welded on the two sides of the embedded bottom plate and extend to the concrete stop blocks (12) to be in contact with the 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 jointly form the inner bottom surface of the sliding chute (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) jointly form the sliding chute (131);
the steel baffle plate (4) bottom fixed connection level sets up steel sliding bottom plate (81), and steel baffle plate (4) with fixed connection between steel sliding bottom plate (81) stiffener (15), steel sliding bottom plate (81) place in spout (131) on pre-buried bottom plate (82) and through fixing bolt (14) with pre-buried bottom plate (82) fixed connection, steel sliding bottom plate (81) with but be sliding contact between direction steel sheet (13), the slip direction in the spout with steel support piece (9)'s moving direction is unanimous.
2. The multi-stage lateral limiting device for the curved and inclined bridges as claimed in claim 1, wherein a cantilever type horizontally arranged vertical limiting steel plate (7) is fixedly connected in front of the steel baffle plate (4) between the steel baffle plate (4) and the limiting steel box (3).
3. The multistage lateral limiting device suitable for the curved and inclined bridges is characterized in that a beam bottom connecting steel plate (17) is arranged at the top of the limiting steel box (3) and fixedly connected with the bottom of the beam body of the main beam (1), a steel box limiting steel plate (18) is arranged at the bottom of the limiting steel box, 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 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 (4) is in contact with a steel box lateral steel plate (16) behind the limiting steel box (3) through the clamped tetrafluoroethylene sliding plate (6); the hanging ends of the steel box limiting steel plates (18) are positioned below the vertical limiting steel plates (7) and are staggered with each other.
4. The multi-stage lateral limiting device for curved and skew bridges of claim 1, wherein the guide steel plate (13) is located below the steel casing (11), and the rear end of the guide steel plate (13) abuts against the concrete stop block (12).
5. The multi-stage lateral limiting device for curved and inclined bridges of claim 1, wherein the sliding groove is arranged below the steel support member, and the central axis of the sliding groove and the central axis of the rod body of the steel support member are in a vertical plane.
6. The multi-stage lateral limit device for curved and inclined bridges of claim 1, wherein the elastic force of the first limit spring (19) is not less than that of the second limit spring (20).
7. The multistage lateral limiting device for curved and skew bridges of claim 1, wherein the fixing bolt (14) does not shear under the action of an E1 earthquake; under the action of E2 earthquake, the fixing bolt (14) can be sheared.
8. The multi-stage lateral limiting device for the curved and inclined bridges of claim 1, wherein the concrete stop blocks (12) are cast synchronously with the construction of the cap beam (2).
9. The multistage lateral limiting device suitable for the curved and inclined bridge as claimed in claim 1, wherein the upper end of the embedded anchor bolt (5) is welded to the bottom of the embedded bottom plate (82), the lower end of the embedded bottom plate is anchored in the cap beam (2), and the embedded anchor bolt is cast synchronously with the construction of the cap beam (2).
10. The multi-stage lateral limiting device for curved and inclined bridges of claim 1, wherein the stiffening plates (15) are erected in the direction of the sliding grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110489330.1A CN113123218A (en) | 2021-05-06 | 2021-05-06 | Multistage lateral limiting device suitable for bent and inclined bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110489330.1A CN113123218A (en) | 2021-05-06 | 2021-05-06 | Multistage lateral limiting device suitable for bent and inclined bridge |
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| Publication Number | Publication Date |
|---|---|
| CN113123218A true CN113123218A (en) | 2021-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110489330.1A Pending CN113123218A (en) | 2021-05-06 | 2021-05-06 | Multistage lateral limiting device suitable for bent and inclined bridge |
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| Country | Link |
|---|---|
| CN (1) | CN113123218A (en) |
Cited By (1)
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| CN114541244A (en) * | 2022-01-25 | 2022-05-27 | 河南大学 | Self-resetting anti-seismic stop block |
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| CN111501514A (en) * | 2020-04-30 | 2020-08-07 | 陈贞全 | Assembled bridge capable of effectively absorbing shock |
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| CN104963278A (en) * | 2015-07-15 | 2015-10-07 | 浙江省交通规划设计研究院 | Pier top displacement spring limiter for high-pier bridge |
| CN206467556U (en) * | 2017-02-16 | 2017-09-05 | 西南交通大学 | A kind of spring-rubber damping device with multistage function of seismic resistance |
| KR101830863B1 (en) * | 2017-04-05 | 2018-02-21 | 용일토건 주식회사 | Hydraulic stopper for seismic control of bridge, and construction method for the same |
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| CN114541244A (en) * | 2022-01-25 | 2022-05-27 | 河南大学 | Self-resetting anti-seismic stop block |
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