阅读说明：本技术 一种采用双层拉索支座的节段高墩桥梁减隔震结构 (Adopt high mound bridge of festival section of double-deck cable support to subtract shock insulation structure ) 是由 朱锋 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种采用双层拉索支座的节段高墩桥梁减隔震结构,涉及桥梁隔震技术领域,解决了现有的双层拉索支座的节段高墩桥梁减隔震结构仅仅依靠橡胶隔震座来实现减震隔震,结构强度较低,不利于增加桥梁抗震能力的上限,带来一定的安全隐患的问题。一种采用双层拉索支座的节段高墩桥梁减隔震结构,包括底座；所述底座的顶部滑动设置有顶座；所述底座的顶部中间固定设置有隔震机构；所述安装槽的内侧通过螺栓固定安装设置有导轨；所述底座顶部的梯形滑槽内滑动设置有顶块；通过设置有底座、顶座、隔震机构和导轨,能够对顶座的晃动幅度进行一定程度上的限制；通过设置有顶块,能够根据不同的条件调整桥梁的晃动幅度,具有良好的实用性。(The invention discloses a seismic isolation and reduction structure of a segmental high-pier bridge with a double-layer stay cable support, relates to the technical field of bridge seismic isolation, and solves the problems that the seismic isolation and reduction structure of the segmental high-pier bridge with the double-layer stay cable support only depends on a rubber seismic isolation seat to realize shock absorption and shock isolation, the structural strength is low, the upper limit of the seismic capacity of the bridge is not increased, and certain potential safety hazards are brought. A shock absorption and isolation structure of a segmental high pier bridge adopting a double-layer inhaul cable support comprises a base; the top of the base is provided with a top seat in a sliding manner; a shock insulation mechanism is fixedly arranged in the middle of the top of the base; the inner side of the mounting groove is fixedly provided with a guide rail through a bolt; a top block is arranged in the trapezoidal sliding groove in the top of the base in a sliding manner; the base, the top seat, the shock insulation mechanism and the guide rail are arranged, so that the shaking amplitude of the top seat can be limited to a certain extent; through being provided with the kicking block, can adjust the range of rocking of bridge according to the condition of difference, have good practicality.)

1. The utility model provides an adopt high mound bridge of festival section of double-deck cable support to subtract shock insulation structure which characterized in that: comprises a base (1); trapezoidal sliding grooves are formed in the two sides of the top of the base (1); the base (1) also comprises a mounting groove (104); the top of the base (1) is provided with a mounting groove (104); the top of the base (1) is provided with a top seat (2) in a sliding manner; the middle of the top of the base (1) is fixedly provided with a shock insulation mechanism (3), and the outer side of the shock insulation mechanism (3) is wrapped with a layer of rubber protection pad; the inner side of the mounting groove (104) is fixedly provided with a guide rail (4) through a bolt, and the guide rail (4) is of a hollow structure; the top of the base (1) is provided with a top block (5) in a sliding mode in the trapezoidal sliding groove, and the outer side of the top block (5) is of a semicircular structure.

2. The seismic isolation and reduction structure for the segmental high pier bridge with the double-layer inhaul cable supports according to claim 1, wherein the seismic isolation and reduction structure comprises: the base (1) further comprises a first fixing bolt (101), a fixing plate (102) and a guy cable (103); the bottom of the base (1) is fixedly provided with a first fixing bolt (101) through welding; the top parts of the front side and the rear side of the base (1) are fixedly provided with fixing plates (102) through welding, and one side of each fixing plate (102) is provided with a slotted hole; the left side and the right side of the base (1) are both provided with a guy cable (103) through bolt fixing installation, and the other end of the guy cable (103) is fixedly connected with the left side and the right side of the top seat (2).

3. The seismic isolation and reduction structure for the segmental high pier bridge with the double-layer inhaul cable supports according to claim 1, wherein the seismic isolation and reduction structure comprises: the top seat (2) also comprises a second fixing bolt (201), a limiting rod (202) and a hollow groove (203); the top of the top seat (2) is fixedly provided with an European second fixing bolt (201) through welding; limiting rods (202) penetrate through the front side and the rear side of the top seat (2), and the outer sides of the limiting rods (202) penetrate through slotted holes of the fixing plate (102); the bottom of the top seat (2) is provided with a hollow groove (203).

4. The seismic isolation and reduction structure for the segmental high pier bridge with the double-layer inhaul cable supports according to claim 1, wherein the seismic isolation and reduction structure comprises: the shock insulation mechanism (3) further comprises an iron plate (301), a rubber plate (302) and a connecting block (303); three groups of iron plates (301) and two groups of rubber plates (302) are fixedly arranged in the middle of the top of the base (1), and the three groups of iron plates (301) and the two groups of rubber plates (302) are distributed at intervals; the group of iron plates (301) at the bottommost part are fixedly connected with the base (1) through welding; the top of the topmost group of iron plates (301) is fixedly provided with a connecting block (303) through welding, and the connecting block (303) is arranged inside the empty groove (203) in a sliding mode.

5. The seismic isolation and reduction structure for the segmental high pier bridge with the double-layer inhaul cable supports according to claim 1, wherein the seismic isolation and reduction structure comprises: the guide rail (4) also comprises a sliding block (401), a connecting rod (402) and a damper (403); the top of the guide rail (4) is provided with a sliding block (401) in a sliding way; the top of the sliding block (401) is rotatably provided with a connecting rod (402) through hinged connection, and the other end of the connecting rod (402) is rotatably connected with the bottom of the top seat (2); the inner side of the guide rail (4) is fixedly provided with a damper (403) through a bolt, and one end of the damper (403) is fixedly connected with the sliding block (401).

6. The seismic isolation and reduction structure for the segmental high pier bridge with the double-layer inhaul cable supports according to claim 1, wherein the seismic isolation and reduction structure comprises: the top block (5) also comprises an outer cylinder (501), a rotary groove (502) and an inner groove (503); the inner sides of the right group of top blocks (5) are fixedly provided with outer cylinders (501) through welding, and the outer cylinders (501) are of hollow structures; a rotary groove (502) is formed in the outer side of the outer cylinder (501); an inner groove (503) is formed inside the outer cylinder (501).

7. The seismic isolation and reduction structure for the segmental high pier bridge with the double-layer inhaul cable supports according to claim 1, wherein the seismic isolation and reduction structure comprises: the top block (5) also comprises a screw rod (504) and a sleeve (505); the inner sides of the left group of top blocks (5) are fixedly provided with screws (504) through welding, and the screws (504) are arranged on the inner side of the outer barrel (501) in a sliding manner; the outer side of the rotary groove (502) is rotatably provided with a sleeve (505) through hinged connection, and the inner side of the sleeve (505) is provided with a thread meshed with the screw rod (504).

Technical Field

The invention relates to the technical field of bridge shock insulation, in particular to a seismic isolation structure of a segmental high pier bridge with a double-layer stay cable support.

Background

With the rapid construction of highways and railways in mountainous areas in the southwest and northwest of China and the development of urban viaducts, more and more high pier bridges are widely applied in the areas, and the pier heights are higher and higher. Particularly, in mountain road construction, due to the complex terrain and the steep hill height, many bridges have to cross river valleys and deep ditches, and many of the bridges adopt simple girder bridges with different spans of 20-50 m or continuous girder bridges with 2-7 spans in one connection, or large-span continuous rigid structures, and the height of the bridge piers is usually as high as tens of meters or even hundreds of meters. With the acceleration of high-grade highway construction in the future, the application of high piers is increasing. The seismic design of the high-pier bridge is always a problem concerned by the engineering world at home and abroad, a ductile seismic method is usually adopted as a preferred scheme, and a seismic isolation and reduction scheme which is easy to repair after an earthquake is difficult to apply to the high-pier bridge.

Through retrieving for example patent that patent number is CN103806372A discloses a high mound bridge of segmentation of adopting double-deck setting cable support subtracts isolation structure, includes cushion cap, lower part pier shaft, upper portion pier shaft and the roof beam body of superpose in proper order from bottom to top, still includes first cable support and second cable support, first cable support sets up on the top surface of upper portion pier shaft, the roof beam body passes through first cable support superpose is in on the top surface of upper portion pier shaft, the second cable support sets up lower part pier shaft with on the butt joint face of upper portion pier shaft, the upper portion pier shaft passes through second cable support superpose is in on the lower part pier shaft. The invention achieves the aims of enhancing the shock absorption and limiting capacity of a bridge system and simultaneously improving the adaptability and diversity of the high pier bridge adopting the shock absorption and isolation technology, greatly reduces or even avoids the generation of shock damage, is suitable for railway bridges, highway bridges and urban viaducts, and particularly has excellent shock resistance for high piers constructed by sections, particularly in high-intensity areas.

For another example, patent No. CN101793004B discloses a seismic isolation and reduction structure for a bridge, wherein an unidirectional movable damping unit and a fixed damping unit are arranged between a bridge body and a bridge pier, the unidirectional movable damping unit and the fixed damping unit are respectively arranged on different bridge piers, the unidirectional movable damping unit is composed of vertical supports arranged on two sides of the bridge pier and unidirectional movable tenons between the two vertical supports, and the fixed damping unit is composed of vertical supports arranged on two sides of the bridge pier and fixed tenons between the two vertical supports or a combination of the fixed tenons and the unidirectional movable tenons. The invention has simple structure, ingenious conception, good anti-seismic effect and convenient assembly and disassembly of anti-seismic components.

However, the shock insulation structure is subtracted to current double-deck cable support's high mound bridge of festival section when using, only rely on rubber shock insulation seat to realize shock attenuation shock insulation, and restrict the sliding distance of support through the cable, structural strength is lower, the shock attenuation effect is limited, be unfavorable for increasing bridge shock resistance's upper limit, and only restrict the sliding distance of support through the cable and lead to the bridge range of rocking too big easily, bring certain potential safety hazard, therefore, unsatisfied current demand, we have proposed a high mound bridge of festival section that adopts double-deck cable support to subtract shock insulation structure to this.

Disclosure of Invention

Problem (A)

The invention aims to provide a segmental high-pier bridge seismic isolation structure adopting a double-layer inhaul cable support, and aims to solve the problems that when the segmental high-pier bridge seismic isolation structure of the existing double-layer inhaul cable support provided in the background art is used, the shock absorption and the seismic isolation are realized only by a rubber seismic isolation seat, the sliding distance of the support is limited by inhaul cables, the structural strength is low, the shock absorption effect is limited, the increase of the upper limit of the seismic resistance of a bridge is not facilitated, and the limiting of the sliding distance of the support by the inhaul cables easily causes the overlarge shaking amplitude of the bridge and brings certain potential safety hazards.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a shock absorption and isolation structure of a segmental high pier bridge adopting a double-layer inhaul cable support comprises a base; trapezoidal sliding grooves are formed in the two sides of the top of the base; the base also comprises a mounting groove; the top of the base is provided with an installation groove; the top of the base is provided with a top seat in a sliding manner; a shock insulation mechanism is fixedly arranged in the middle of the top of the base, and a layer of rubber protection pad is wrapped outside the shock insulation mechanism; the inner side of the mounting groove is fixedly provided with a guide rail through a bolt, and the guide rail is of a hollow structure; the trapezoidal spout at base top slides and is provided with the kicking block, and the outside of kicking block is semi-circular structure.

Furthermore, the base also comprises a first fixing bolt, a fixing plate and a guy cable; the bottom of the base is fixedly provided with a first fixing bolt through welding; the top parts of the front side and the rear side of the base are fixedly provided with fixed plates through welding, and one side of each fixed plate is provided with a slotted hole; the left and right sides of base all is provided with the cable through bolt fixed mounting, and the other end of cable and the left and right sides fixed connection of footstock.

Furthermore, the top seat also comprises a second fixing bolt, a limiting rod and a hollow groove; the top of the top seat is fixedly provided with a second European fixing bolt through welding; limiting rods penetrate through the front side and the rear side of the top seat, and the outer sides of the limiting rods penetrate through the slotted holes of the fixing plate; the bottom of the top seat is provided with a hollow groove.

Furthermore, the shock insulation mechanism also comprises an iron plate, a rubber plate and a connecting block; three groups of iron plates and two groups of rubber plates are fixedly arranged in the middle of the top of the base, and the three groups of iron plates and the two groups of rubber plates are distributed at intervals; the group of iron plates at the bottommost part are fixedly connected with the base through welding; the top of a group of iron plates at the top is provided with a connecting block through welding, and the connecting block is arranged inside the empty groove in a sliding mode.

Furthermore, the guide rail also comprises a slide block, a connecting rod and a damper; the top of the guide rail is provided with a sliding block in a sliding way; the top of the sliding block is rotatably provided with a connecting rod through hinge connection, and the other end of the connecting rod is rotatably connected with the bottom of the top seat; the inner side of the guide rail is fixedly provided with a damper through a bolt, and one end of the damper is fixedly connected with the sliding block.

Furthermore, the top block also comprises an outer cylinder, a rotary groove and an inner groove; the inner sides of the group of top blocks on the right side are fixedly provided with outer cylinders through welding, and the outer cylinders are of hollow structures; a rotary groove is formed in the outer side of the outer cylinder; an inner groove is arranged on the inner side of the outer cylinder.

Furthermore, the top block also comprises a screw rod and a sleeve; the inner sides of the left group of top blocks are fixedly provided with screws through welding, and the screws are arranged on the inner side of the outer barrel in a sliding manner; the outer side of the rotary groove is rotatably provided with a sleeve through hinged connection, and the inner side of the sleeve is provided with a thread meshed with the screw rod.

(III) advantageous effects

The invention provides a seismic isolation and reduction structure of a segmental high pier bridge with a double-layer inhaul cable support, which is provided with a base, a top seat, a seismic isolation mechanism and a guide rail, when the vibration of the bridge is transmitted to the top seat or the vibration of the ground is transmitted to the base, the vibration can be absorbed through the double shock absorption and seismic isolation structures of the guide rail of the seismic isolation mechanism, so that the influence of the vibration on the bridge can be reduced to the maximum extent, the seismic capacity of the bridge is further enhanced, and meanwhile, the vibration amplitude of the top seat is limited to a certain extent through the sliding of a connecting block in a hollow groove, the swinging of a limiting rod in a groove hole at the top of a fixed plate and the matching action of various forms of inhaul cables.

Through being provided with the kicking block, can drive the inside roll-off of screw rod from the urceolus through rotatory sleeve to the length of extension urceolus and screw rod, and the top moves two sets of kicking blocks and slides to the outside along the trapezoidal spout at base top, thereby can restrict the range of motion of cable through the kicking block, thereby restrict the range of sliding of footstock, can adjust the range of rocking of bridge according to the condition of difference, make the bridge can be applicable to more service conditions, have good practicality.

Drawings

FIG. 1 is a schematic front perspective view of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of an axial side of an embodiment of the present invention;

FIG. 3 is a schematic top view of an embodiment of the present invention;

FIG. 4 is a schematic bottom view of an embodiment of the present invention;

FIG. 5 is a schematic top view of a base in an embodiment of the invention;

FIG. 6 is a schematic view of a disassembled structure of the outer barrel and the sleeve in the embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a top base according to an embodiment of the present invention;

in fig. 1 to 7, the correspondence between the part names or lines and the reference numbers is:

1. a base; 101. a first fixing bolt; 102. a fixing plate; 103. a cable; 104. mounting grooves; 2. a top seat; 201. a second fixing bolt; 202. a limiting rod; 203. an empty groove; 3. a shock isolation mechanism; 301. an iron plate; 302. a rubber plate; 303. connecting blocks; 4. a guide rail; 401. a slider; 402. a connecting rod; 403. a damper; 5. a top block; 501. an outer cylinder; 502. rotating the groove; 503. an inner tank; 504. a screw; 505. a sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1 to 7, an embodiment of the present invention includes: a shock absorption and isolation structure of a segmental high pier bridge adopting a double-layer inhaul cable support comprises a base 1; trapezoidal sliding grooves are formed in the two sides of the top of the base 1; the base 1 further comprises a mounting groove 104; the top of the base 1 is provided with a mounting groove 104; the top of the base 1 is provided with a top seat 2 in a sliding way; wherein, the top seat 2 further comprises a second fixing bolt 201, a limiting rod 202 and a hollow groove 203; the top of the top seat 2 is fixedly provided with a second European fixing bolt 201 through welding; limiting rods 202 penetrate through the front side and the rear side of the top seat 2, and the outer sides of the limiting rods 202 penetrate through the slotted holes of the fixing plate 102; the bottom of the top seat 2 is provided with a hollow groove 203; a shock insulation mechanism 3 is fixedly arranged in the middle of the top of the base 1, and a layer of rubber protection pad is wrapped outside the shock insulation mechanism 3; the shock isolation mechanism 3 further comprises an iron plate 301, a rubber plate 302 and a connecting block 303; three groups of iron plates 301 and two groups of rubber plates 302 are fixedly arranged in the middle of the top of the base 1, and the three groups of iron plates 301 and the two groups of rubber plates 302 are distributed at intervals; the group of iron plates 301 at the bottommost part are fixedly connected with the base 1 through welding; the top of the topmost group of iron plates 301 is fixedly provided with a connecting block 303 through welding, and the connecting block 303 is slidably arranged in the hollow groove 203; the inner side of the mounting groove 104 is fixedly provided with a guide rail 4 through a bolt, and the guide rail 4 is of a hollow structure; wherein, the guide rail 4 further comprises a sliding block 401, a connecting rod 402 and a damper 403; the top of the guide rail 4 is provided with a sliding block 401 in a sliding way; the top of the sliding block 401 is rotatably provided with a connecting rod 402 through hinge connection, and the other end of the connecting rod 402 is rotatably connected with the bottom of the top seat 2; a damper 403 is fixedly installed on the inner side of the guide rail 4 through a bolt, and one end of the damper 403 is fixedly connected with the slider 401; a top block 5 is arranged in a trapezoidal sliding groove in the top of the base 1 in a sliding mode, and the outer side of the top block 5 is of a semicircular structure; wherein, the top block 5 also comprises an outer cylinder 501, a rotary groove 502 and an inner groove 503; the inner sides of the right group of top blocks 5 are fixedly provided with an outer cylinder 501 through welding, and the outer cylinder 501 is of a hollow structure; a rotary groove 502 is formed in the outer side of the outer cylinder 501; an inner groove 503 is formed inside the outer cylinder 501.

Wherein, the base 1 further comprises a first fixing bolt 101, a fixing plate 102 and a guy cable 103; the bottom of the base 1 is fixedly provided with a first fixing bolt 101 through welding; the top parts of the front side and the rear side of the base 1 are fixedly provided with fixing plates 102 through welding, and one side of each fixing plate 102 is provided with a slotted hole; the left side and the right side of the base 1 are both fixedly provided with inhaul cables 103 through bolts, and the other ends of the inhaul cables 103 are fixedly connected with the left side and the right side of the top seat 2; through being provided with fixed plate 102, can cooperate gag lever post 202 and cable 103 to assist spacingly to the range of sliding of footstock 2, avoid the range of rocking of footstock 2 too big.

Wherein, the top block 5 also comprises a screw rod 504 and a sleeve 505; the inner sides of the left group of top blocks 5 are fixedly provided with screws 504 by welding, and the screws 504 are arranged on the inner side of the outer cylinder 501 in a sliding manner; the outer side of the rotary groove 502 is rotatably provided with a sleeve 505 through hinged connection, and the inner side of the sleeve 505 is provided with threads meshed with the screw 504; by providing the sleeve 505, the distance between the two sets of the top blocks 5 can be controlled by rotating the sleeve 505 to control the length of the screw 504.

The working principle is as follows: the base 1 and the footstock 2 are respectively fixed on the top of a pier and the bottom of a bridge through a first fixing bolt 101 and a second fixing bolt 201, vibration and pressure transmitted from the top of the bridge are firstly transmitted to the top of a shock isolation mechanism 3, a part of vibration is absorbed through a rubber plate 302, meanwhile, vibration received by the footstock 2 is transmitted to the top of a sliding block 401 through a connecting rod 402, the sliding block 401 is jacked to slide outwards along a guide rail 4, so that the vibration is transmitted to a damper 403, part of vibration and pressure are absorbed through the damper 403, when the bridge shakes, the footstock 2 can slide left and right on the top of the base 1, and the shaking amplitude of the footstock 2 is limited through the matching effect of the connecting block 303 sliding in the hollow groove 203, the limiting rod 202 shaking in the groove hole on the top of the fixing plate 102 and the various forms of the inhaul cable 103, if the shaking amplitude of the footstock 2 is too large, can drive screw rod 504 from the inside roll-off of urceolus 501 through rotating sleeve 505 to the length of extension urceolus 501 and screw rod 504, and the top moves two sets of kicking blocks 5 and slides to the outside along the trapezoidal spout at base 1 top, thereby prescribes a limit to the range of motion of cable 103, thereby can restrict the range of rocking of footstock 2.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.