CN110331652B - Three-way adjustable anti-seismic system for bridge crossing fracture zone - Google Patents
Three-way adjustable anti-seismic system for bridge crossing fracture zone Download PDFInfo
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- CN110331652B CN110331652B CN201910310772.8A CN201910310772A CN110331652B CN 110331652 B CN110331652 B CN 110331652B CN 201910310772 A CN201910310772 A CN 201910310772A CN 110331652 B CN110331652 B CN 110331652B
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
Abstract
The utility model provides a stride across adjustable antidetonation system of rupture zone bridge three-dimensional, through adopting dredging type antidetonation measure and stifled type antidetonation measure, every kind antidetonation measure sets up the earthquake-resistant structure respectively along bridge vertical, horizontal three-dimensional, constitutes and strides across rupture zone bridge three-phase adjustable antidetonation system. The three-dimensional adjustable earthquake-resistant system spanning the fracture zone bridge adopts the three-dimensional earthquake-resistant structure, so that the acceleration and interlayer displacement of the upper structure during an earthquake can be reduced to a great extent, the earthquake reaction of the upper structure is greatly reduced, and the effects caused by earthquake force are dispersed and reduced; and has the functions of reducing casualties and quickly recovering the traffic.
Description
Technical Field
The utility model relates to a bridge construction field especially relates to a stride across adjustable antidetonation system of rupture zone bridge three-dimensional.
Background
At present, all countries require bridge structures to avoid crossing earthquake active faults as much as possible, but the distribution of underground active faults is not completely clear; meanwhile, the crust breaking layer is very widely distributed; due to the requirement of traffic construction, the bridge in the actual engineering inevitably faces the situation of crossing earthquake active fault.
The seismic characteristic of a near fault is obviously different from that of a far-field, the seismic characteristic of the near fault shows obvious directional effect and sliding impact effect, and the sliding impact effect mainly shows that the displacement time course has obvious residual displacement. If the bridge crosses the fault, obvious displacement input difference is generated at the bridge pier positions of the upper plate block and the lower plate block of the fault due to the sliding impact effect. Just because of the existence of this significant displacement difference, many instances of cross-fault bridge failure have occurred during past earthquakes, with beam-drop seismic damage being particularly prevalent.
Under the normal condition, the construction measures for preventing the falling beam from being damaged by earthquakes are mainly limited to the earthquake-resistant measures in a certain direction, for example, the detachable steel pad stone can only adapt to the permanent vertical displacement generated after the earthquake of the cross-fault bridge through self height adjustment; the steel bracket beam falling prevention device can only adapt to permanent longitudinal displacement generated after a fault-crossing bridge earthquake by enlarging the width of the minimum bearing surface, and the anti-seismic measure is single.
Disclosure of Invention
Technical problem to be solved
The present disclosure provides a three-way adjustable seismic system for bridge spanning a fracture zone to at least partially address the above-identified technical problems.
(II) technical scheme
According to one aspect of the disclosure, a three-dimensional adjustable earthquake-resistant system for a bridge crossing a fracture zone is provided, and by adopting dredging type earthquake-resistant measures and blocking type earthquake-resistant measures, earthquake-resistant structures are respectively arranged in each earthquake-resistant measure along the vertical direction, the longitudinal direction and the transverse direction of the bridge to form the three-dimensional adjustable earthquake-resistant system for the bridge crossing the fracture zone.
In some embodiments, the canalizing type anti-seismic measure includes: reserved parts are arranged at the vertical-detachable steel cushion stone, the longitudinal-steel bracket beam falling prevention device, the transverse-pier, the table cap or the cover beam;
the block-type anti-seismic measure comprises the following steps: a longitudinal-beam falling prevention stop block, a longitudinal-beam connecting device, a transverse-beam falling prevention stop block and a longitudinal + transverse-lead rubber support.
In some embodiments, the vertical-removable steel pad stone is welded by steel plates, and filled with micro-expansion concrete, and the steel pad stone can be adjusted in height.
In some embodiments, the steel cushion stones comprise a plurality of types, each type has different thickness, the steel cushion stones are connected by high-strength bolts, each layer is coated with inorganic zinc-rich anti-slip coating, and the steel cushion stones at the lowest layer are connected and fixed with the pier top through embedded anchor bars.
In some embodiments, the steel pad stone is internally stiffened by using plate ribs, the internal space is divided into a plurality of independent lattices, each lattice is provided with a concrete pouring port and an exhaust hole, and after the micro-expansion concrete pouring is finished, the steel pad stone is blocked by using an equal-strength method and is smoothly polished; the exposed surface of the steel pad stone is coated with anticorrosion paint, and all layers are sealed.
In some embodiments, the longitudinal-steel bracket girder-dropping prevention apparatus, which uses piers, caps or capping to mount a steel bracket for longitudinal adjustment, includes:
the steel bracket is connected with the top of the cross section of the pier stud and is used for increasing the width of a bearing surface of a bearing connection part;
the bracket stop blocks are arranged on two sides of the steel bracket and used for limiting the transverse displacement of the main beam under the action of an earthquake;
the rubber cushion block is arranged above the steel bracket and used for preventing the girder from being broken when the girder falls on the steel bracket after the support is separated, so that the connection buffering effect is achieved;
the bolt and the steel pull rod are used for connecting and anchoring the steel bracket main body and the pier stud; and
and the embedded steel plates with different sizes are used for connecting the main body structure of the steel bracket with the pier stud.
In some embodiments, the connection of the components in the longitudinal-steel bracket girder drop prevention apparatus comprises: arranging an embedded steel plate on the top of the cross section of the pier stud; the steel bracket main body structure is welded and connected with the pier top embedded steel plate; the steel bracket is provided with accessory parts comprising a bracket stop block and a rubber pad.
In some embodiments, a reserved part is arranged at the transverse pier, the abutment cap or the cover beam for transverse linear adjustment, the reserved part is of a reinforced concrete structure, the width value of the reserved part is determined by the maximum dislocation of a fracture zone at the bridge site, and the length and the height of the reserved part are consistent with the size of the pier, the abutment cap or the cover beam.
In some embodiments, the longitudinal-drop beam stop comprises a first steel plate, a second steel plate, and a rubber pad, wherein,
the first steel plate is vertically arranged at the bottom of the steel box girder and is perpendicular to the steel box girder, and is used for providing a connecting platform, so that the steel box girder, the second steel plate and the rubber block are connected with the steel box girder to form a stop block;
the second steel plates are arranged at the bottom of the steel box girder at intervals with the same distance and are vertical to the first steel plates vertical to the steel box girder, and the second steel plates are of a bearing structure and resist the impact force generated by earthquake;
the rubber cushion block is arranged on the vertical first steel plate and used as a buffer device to slow down impact force when the stop dog collides with the cushion stone.
In some embodiments, the connection between the portions of the longitudinal-drop beam stop comprises: the first steel plate connected with the steel box girder is manufactured in advance together with the steel box girder in a pre-buried welding mode; the first steel plate and the first steel plate, and the first steel plate and the second steel plate are connected by welding; the first steel plate is connected with the rubber cushion block in an adhesion mode.
In some embodiments, the longitudinal-coupling beam device is disposed outside the steel box girder web for reinforcing the connection of the adjacent steel box girders, and the longitudinal-coupling beam device includes:
the steel bar is used as a bearing component and an assembling axis;
the spherical panel is used for adjusting the axis rotation angle of the adjacent beam bodies;
the spring and the buffer rubber ring are used for buffering the impact force of the device;
the anti-corrosion filler is used for preventing corrosion inside the connecting beam device;
the protective cover is used for providing a device closed space and preventing corrosion;
the steel plates N1 and N2, cushion blocks and bolts are used for connecting the device;
the longitudinal beam connecting device is symmetrical in every two adjacent steel box girders, the steel bar penetrates through end transverse clapboards of the two steel box girders, and the longitudinal beam connecting device is provided with a steel plate, a spherical panel, a cushion rubber ring, a cushion block and a bolt from the middle of the two adjacent steel box girders to the outside in sequence; the spring is arranged between the buffer rubber ring and the cushion block, part of the spring is sleeved on the buffer rubber ring, and the anti-corrosion filler is filled in a space surrounded by the steel plates N1, N2 and the protective cover.
In some embodiments, the cross-drop beam stop includes a primary stop, a secondary stop, and a steel box beam side stop,
the primary check block is arranged on the inner side of the steel cushion stone along the transverse direction of the bridge;
the secondary stop block is arranged at a pier, a table cap or a cover beam of the bridge spanning the fracture zone and is of a reinforced concrete structure, and a rubber cushion block is arranged at the upper part of the secondary stop block and collides with the side stop block of the steel box girder to bear force;
the steel box girder side stop block is arranged at the lower part of the steel box girder, corresponds to the secondary stop block, comprises 6 steel plates with different sizes, and is assembled by adopting the above materials with corresponding different sizes according to the self weight of the upper structure and the earthquake fortification standard; wherein, steel box girder roof beam side dog is makeed in advance together with the steel box girder, and all steel sheet connections all adopt the welding.
(III) advantageous effects
According to the technical scheme, the three-way adjustable earthquake-resistant system for the bridge spanning the fracture zone has at least one of the following beneficial effects:
(1) the three-dimensional adjustable earthquake-resistant system spanning the fracture zone bridge adopts the three-dimensional earthquake-resistant structure, so that the acceleration and interlayer displacement of the upper structure during an earthquake can be reduced to a great extent, the earthquake reaction of the upper structure is greatly reduced, and the effects caused by earthquake force are dispersed and reduced;
(2) the three-dimensional adjustable earthquake-resistant system spanning the bridge with the fracture zone adopts a multi-set beam falling prevention structure measure, so that serious damage and casualties caused by an earthquake are avoided;
(3) the three-way adjustable anti-seismic system for crossing the fracture zone bridge can ensure the traffic function of the bridge after the strong earthquake, horizontal, longitudinal and vertical dislocation of 1.4 meters at most can be generated due to the active fault, and three-way adjustable construction measures are adopted for quickly adjusting the line shape and the elevation after the earthquake, so that the traffic repairing function of smooth line shape and proper index is achieved.
Drawings
Fig. 1a is a cross-sectional view of a steel curb of a three-way adjustable seismic system according to an embodiment of the disclosure.
Fig. 1b is a steel keystone plan view of a three-way adjustable seismic system according to an embodiment of the disclosure.
Fig. 1c is a schematic view of positioning of embedded anchor bars of the three-dimensional adjustable earthquake-resistant system according to the embodiment of the disclosure.
Fig. 1d is a schematic view of a steel-padded stone assembly structure of the three-way adjustable earthquake-resistant system according to the embodiment of the disclosure.
Fig. 2a is a schematic view of a mounting position of a steel bracket of a three-way adjustable seismic system according to an embodiment of the disclosure.
Fig. 2b is a structural elevation view of a steel bracket of the three-way adjustable seismic system of the embodiment of the present disclosure.
Fig. 2c is a cross-sectional view of a steel bracket structure of a three-way adjustable seismic system according to an embodiment of the present disclosure.
Fig. 2d is a layout of steel brackets and pier connecting bolts of the three-way adjustable earthquake-resistant system according to the embodiment of the disclosure.
Fig. 3 is a three-dimensional view of a reserved portion arranged on the outer side of a stop block of the three-dimensional adjustable earthquake-resistant system according to the embodiment of the disclosure.
Fig. 4a is a schematic view of the installation position of a longitudinal anti-drop beam stop of the three-dimensional adjustable earthquake-resistant system according to the embodiment of the present disclosure.
Fig. 4b is a side view of the mounting position of the longitudinal anti-drop beam stop of the three-way adjustable seismic system of the embodiment of the present disclosure.
Fig. 4c is a detailed structural diagram of a longitudinal anti-drop beam stop of the three-way adjustable seismic system according to the embodiment of the disclosure.
Fig. 5a is a cross-sectional view of a longitudinal-coupling beam device of a three-way adjustable seismic system according to an embodiment of the disclosure.
Figure 5b is a side view of a longeron device of a three-way adjustable seismic system according to an embodiment of the present disclosure.
Fig. 5c is a detailed structural diagram of the longitudinal-coupling beam device of the three-way adjustable seismic system according to the embodiment of the present disclosure.
Fig. 6a is a schematic view of a transverse anti-drop beam stop mounting position of the three-way adjustable seismic system according to the embodiment of the disclosure.
Fig. 6b is a side view of a lateral drop beam stop of a three-way adjustable seismic system according to an embodiment of the present disclosure.
FIG. 6c is a detailed structural diagram of a steel box girder side block of the three-way adjustable earthquake-resistant system according to the embodiment of the present disclosure
Fig. 6d is a steel plate structure view of the steel box girder side block of the three-way adjustable earthquake-resistant system according to the embodiment of the present disclosure.
Fig. 7 is a schematic view of the installation position of a lead rubber support of the three-way adjustable anti-seismic system according to the embodiment of the disclosure.
Detailed description of the invention
The utility model provides a stride across adjustable antidetonation system of rupture zone bridge three-dimensional, propose from bridge vertical, horizontal three-dimensional to stride across adjustable antidetonation system of rupture zone bridge through combining two kinds of antidetonation constructional measures. The two seismic construction measures include:
designing the minimum width of a supporting surface of a supporting connection part;
and secondly, mounting constraint devices between adjacent beams and between the piers and the beams.
The first measure is better to be sparse, the second measure is blocking, the beam falling is prevented by the blocking method under the action of small earthquake, and the beam falling is prevented by the sparse method under the action of large earthquake.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Certain embodiments of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the disclosure are shown. Indeed, various embodiments of the disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In one exemplary embodiment of the present disclosure, a three-way adjustable seismic system for a bridge spanning a fracture zone is provided. In the three-direction adjustable earthquake-resistant system, two earthquake-resistant measures of dredging and blocking are adopted, and the bridge-crossing fracture zone bridge adjustable earthquake-resistant system is provided for the bridge in the vertical direction, the longitudinal direction and the transverse direction. The method specifically comprises the following steps:
the construction measures of "sparse" are as follows:
(1) vertical-detachable steel pad stone
(2) Longitudinal-steel bracket beam falling prevention device
(3) The horizontal pier, the table cap or the capping beam are provided with a reserved part (bracket)
The construction measures of blocking are as follows:
(1) longitudinal-anti-falling beam stop block
(2) Longitudinal beam connecting device
(3) Transverse-anti-falling beam stop block
(4) Longitudinal and transverse lead core rubber support
The various parts of the seismic system are described in detail below with reference to the accompanying drawings.
The construction measures of "sparse" are as follows:
(1) vertical-detachable steel pad stone
Fig. 1a is a cross-sectional view of a steel curb of a three-way adjustable seismic system according to an embodiment of the disclosure. Fig. 1b is a steel keystone plan view of a three-way adjustable seismic system according to an embodiment of the disclosure. Fig. 1c is a schematic view of positioning of embedded anchor bars of the three-dimensional adjustable earthquake-resistant system according to the embodiment of the disclosure. Fig. 1d is a schematic view of a steel-padded stone assembly structure of the three-way adjustable earthquake-resistant system according to the embodiment of the disclosure.
As shown in fig. 1a-1c, the detachable steel pad 10 is a detachable steel pad, and the height of the pad is adjusted by vertical dislocation, and the longitudinal slope of the bridge deck is readjusted to meet the functional requirement of smooth driving. The steel shim 10 is formed by welding steel plates 101, and is filled with micro-expansion concrete 102. The steel cushion stone can be divided into several types according to the requirements, 4 types are adopted in the embodiment, and the thicknesses of the types are different so as to meet the lifting or lowering requirements of the support cushion stone under different displacement conditions. The various steel cushion stones are connected by high-strength bolts, inorganic zinc-rich anti-slip coating is coated between every two layers, and the steel cushion stone at the lowest layer is connected and fixed with the pier top through the embedded anchor bars 106. The embedded anchor bars 106 pass through the embedded anchor holes 105.
The preparation of steel bed stone adopts the mill prefabrication, and is higher to the requirement of roughness, but the apron is made in the piecemeal, and it is smooth-going that the connection position needs to polish, and steel bed stone inside adopts the plate rib to put more energy into, divide into 9 solitary lattices with the inner space, and concrete pouring opening 103 and exhaust hole 104 are seted up to every lattice, and little expansive concrete 12 pours into the completion back, adopts the equal strength method to carry out the shutoff to polish smoothly. The exposed surface of the steel pad stone is well coated with anticorrosion paint, and each layer is sealed by adopting putty.
(2) Longitudinal-steel bracket beam falling prevention device
Fig. 2a is a schematic view of a mounting position of a steel bracket of a three-way adjustable seismic system according to an embodiment of the disclosure. Fig. 2b is a structural elevation view of a steel bracket of the three-way adjustable seismic system of the embodiment of the present disclosure. Fig. 2c is a cross-sectional view of a steel bracket structure of a three-way adjustable seismic system according to an embodiment of the present disclosure. Fig. 2d is a layout of steel brackets and pier connecting bolts of the three-way adjustable earthquake-resistant system according to the embodiment of the disclosure.
As shown in fig. 2a-2d, under the condition of longitudinal dislocation, a pier, a table cap or a capping beam is adopted to install a steel bracket 20 for longitudinal adjustment, and a main beam at a fracture zone is replaced to restore the function of traffic circulation. The steel bracket 20 can increase the enough bearing surface width of the bearing connection part to prevent the occurrence of the girder falling earthquake damage, and the steel bracket can reduce the additional mass of the pier top, thereby reducing the stress requirement of the lower structure and preventing the additional mass from additionally damaging the original bridge structure.
As shown in fig. 2a, the structural parts of the steel bracket include a bracket stop 201, a rubber pad 202, an M22 high-strength bolt 203, a steel tie bar 204 and several steel plates with different sizes.
Wherein, the main structure of the steel bracket 20 is connected with the top of the cross section of the pier stud and is used for increasing the width of the bearing surface of the bearing connection part;
the bracket stoppers 201 are arranged on two sides of the steel bracket 20 and are mainly used for limiting the transverse displacement of the main beam under the action of an earthquake;
the rubber cushion block 202 is arranged above the steel bracket 20, and the arrangement of the rubber cushion block is mainly used for preventing a girder from being broken by large impact force generated when the girder directly falls on the steel bracket 20 after a support is separated, so that a certain connection buffering effect is achieved;
the high-strength bolt 203 and the steel pull rod 204 are used for connecting and anchoring the steel bracket main body and the pier stud.
The concrete connection between each part includes:
pre-burying a steel plate on the top of the cross section of the pier stud;
the main structure of the steel bracket 20 is welded with the pier top embedded steel plate;
the steel bracket 20 is mounted with accessories such as bracket stop 201, rubber pad 202 block, etc.
(3) The horizontal pier, the table cap or the capping beam are provided with a reserved part (bracket)
Fig. 3 is a three-dimensional view of a reserved portion arranged on the outer side of a stop block of the three-dimensional adjustable earthquake-resistant system. As shown in FIG. 3, under the condition of transverse dislocation, the reserved part is arranged on the outer side of the stop block at the pier, the table cap or the capping beam of the bridge crossing the fracture zone for transverse linear adjustment, so that the function of recovering the traffic is achieved.
The reserved part is of a reinforced concrete structure and can be cast together with the bridge pier. The width of the bridge is selected to be the maximum dislocation of the fracture zone at the bridge site, and the length and the height are recommended to be consistent with the size of the pier, the table cap or the capping beam.
The construction measures of blocking are as follows:
(1) longitudinal-anti-falling beam stop block
The longitudinal anti-falling beam stop block adopts a simple structure and a convenient construction form, and the installation position schematic diagram and the detailed structural diagram are shown in fig. 4 a. Fig. 4b is a side view of the mounting position of the longitudinal anti-drop beam stop of the three-way adjustable seismic system of the embodiment of the present disclosure. Fig. 4c is a detailed structural diagram of a longitudinal anti-drop beam stop of the three-way adjustable seismic system according to the embodiment of the disclosure.
As shown in fig. 4a-4c, the longitudinal anti-falling beam stopper mainly comprises two steel plates with different sizes and rubber pads 401, the first steel plate 402 is vertically arranged at the bottom of the steel box girder and is perpendicular to the steel box girder, the second steel plates are arranged at the bottom of the steel box girder at intervals with the same distance and are both perpendicular to the first steel plate 402 perpendicular to the steel box girder, and the rubber pads 401 are arranged on the first vertical steel plate 402. The stop block can be assembled by adopting the above materials with corresponding different sizes according to the self weight of the superstructure and the earthquake fortification standard.
The first steel plate 402 mainly provides a connecting platform, so that the steel box girder, the second steel plate 403 and the rubber block 401 are connected with the connecting platform to form a stop block;
the second steel plate 403 is a main bearing structure and resists the collision force generated by earthquake;
the rubber cushion block 401 is a buffer device, and reduces the impact force when the stop block collides with the cushion stone.
The concrete connection between each part includes:
1. a first steel plate 402 connected with the steel box girder is manufactured in advance together with the steel box girder in a pre-buried welding mode;
2. the first steel plate 402 and the first steel plate 402, and the first steel plate 402 and the second steel plate 403 are connected by welding;
3. the first steel plate 402 is connected with the rubber pad 401 by using a high-strength adhesive.
(2) Longitudinal beam connecting device
Fig. 5a is a cross-sectional view of a longitudinal-coupling beam device of a three-way adjustable seismic system according to an embodiment of the disclosure. Figure 5b is a side view of a longeron device of a three-way adjustable seismic system according to an embodiment of the present disclosure. Fig. 5c is a detailed structural diagram of the longitudinal-coupling beam device of the three-way adjustable seismic system according to the embodiment of the present disclosure. As shown in fig. 5a-5c, the longitudinal girder connecting device is located outside the web of the steel box girder and is mainly used for reinforcing the connection of the adjacent steel box girders to form a whole body to avoid the risk of single-span girder falling.
The longitudinal beam connecting device comprises the following components: the steel bar 501, the spherical plate 502, the spring 503, the cushion rubber ring 504, the cushion block 505, the bolt 506, the protective cover 507, the anti-corrosion filling material 508 and the steel plates N1 and N2 connected with the web. The steel plate N1 is vertically arranged, the steel plate N2 surrounds the steel plate N1, and a closed space is formed by the steel plate N2, the protective cover 507 and the steel plate N1.
Wherein, the steel bar 501 is a bearing component and an assembling axis; ball panel 502 is used to adjust the axis rotation angle of adjacent beams; the spring 503 and the buffer rubber ring 504 are used for buffering the impact force of the device; the anti-corrosion filling material 508 is used for corrosion prevention inside the connecting beam device; the protective cover 507 provides a device enclosure space for corrosion protection; a cushion block 505 and a bolt 506 are used for device connection; steel plates N1, N2 were used for device attachment.
Wherein the members are symmetrically arranged in every two adjacent steel box girders. The steel bar 501 penetrates through end diaphragm plates of two steel box girders, and the longitudinal beam connecting device is provided with a steel plate N1, a spherical panel 502, a buffer rubber ring 504, a cushion block 505 and a bolt 506 from the middle of two adjacent steel box girders to the outside in sequence. The spring 503 is arranged between the cushion rubber ring 504 and the cushion block 505, and partially sleeved on the cushion rubber ring 504, and the anti-corrosion filler 508 is filled in the space surrounded by the steel plates N1, N2 and the protective cover 507. Specifically, the connection between each part comprises:
the steel plates N1 and N2 are connected with the steel box girder web plates by welding;
the ball panel 502, the spring 503, the buffer rubber ring 504, the cushion block 505 and the anti-corrosion filling material 508 are assembled in sequence by taking the steel bar 501 as an axis and are finally screwed by the bolt 506;
the protective cover 507 and the steel plate N2 are connected by a high-strength adhesive.
(3) Transverse-anti-falling beam stop block
Fig. 6a is a schematic view of a transverse anti-drop beam stop mounting position of the three-way adjustable seismic system according to the embodiment of the disclosure. Fig. 6b is a side view of a lateral drop beam stop of a three-way adjustable seismic system according to an embodiment of the present disclosure. Fig. 6c is a detailed structural diagram of a steel box girder side block of a three-way adjustable earthquake-resistant system according to an embodiment of the present disclosure, and fig. 6d is a steel plate structural diagram of a steel box girder side block of a three-way adjustable earthquake-resistant system according to an embodiment of the present disclosure.
As shown in fig. 6a-6d, the transverse anti-drop beam stop block comprises a primary stop block 601, a secondary stop block 602 and a steel box beam side stop block 603, and the schematic installation position and the detailed construction diagram are shown in fig. 6. The steel plates N1, N2, N3 and N4 are stop block components, N5 is a local reinforcing steel plate in the steel box girder, and N6 is a steel plate for connecting a stop block bottom plate N1 with the steel box girder bottom plate.
The transverse falling-proof beam primary stop block 601 is arranged on the inner side of the steel pad stone 10 along the transverse direction of the bridge, and is similar to the longitudinal falling-proof beam stop block, and the material composition, connection description and function description of each part can refer to the longitudinal falling-proof beam stop block.
The transverse anti-falling beam secondary stop block 602 is of a reinforced concrete structure and is arranged at a pier, a table cap or a cover beam of a bridge crossing a fracture zone, as shown in fig. 3, and can be cast together with a pier, and the width, length and height of the transverse anti-falling beam secondary stop block are calculated according to the dead weight of an upper structure and an anti-seismic fortification standard and then are taken. The upper part of the secondary stop 602 collides with the side stop of the steel box girder to be stressed, and a rubber cushion block 604 is arranged to buffer the collision force.
As shown in fig. 6c-6d, the steel box girder side stopper 603 is disposed at the lower portion of the steel box girder, corresponds to the second-stage stopper, and is mainly composed of 6 steel plates with different sizes by welding, and the stopper can be assembled by adopting the above materials with different sizes according to the self weight of the upper structure and the earthquake fortification standard. The steel box girder side stoppers 603 and the steel box girder are manufactured in advance, and all steel plates are welded.
(4) Longitudinal and transverse lead core rubber support
Fig. 7 is a schematic view of the installation position of a lead rubber support of the three-way adjustable anti-seismic system according to the embodiment of the disclosure. Lead core rubber support products are mature, and specific model selection can be performed according to the support counter force and the standard. The performance requirements of the lead core rubber support 70 can refer to the technical indexes of JT822-2011 road and bridge lead core shock insulation rubber support.
So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Unless otherwise indicated, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by the present disclosure. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". Generally, the expression is meant to encompass variations of ± 10% in some embodiments, 5% in some embodiments, 1% in some embodiments, 0.5% in some embodiments by the specified amount.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element or any ordering of one element from another or the order of manufacture, and the use of the ordinal numbers is only used to distinguish one element having a certain name from another element having a same name.
In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Also in the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (5)
1. A three-way adjustable earthquake-resistant system for a bridge crossing a fracture zone is characterized in that a three-phase adjustable earthquake-resistant system for a bridge crossing a fracture zone is formed by adopting dredging type earthquake-resistant measures and blocking type earthquake-resistant measures, wherein each earthquake-resistant measure is provided with an earthquake-resistant structure along the vertical direction, the longitudinal direction and the transverse direction of the bridge;
the dredging type anti-seismic measure comprises the following steps: a reserved part is arranged at the vertical-detachable steel pad stone, the longitudinal-steel bracket beam falling prevention device, the transverse-pier, the table cap or the cover beam;
the block-type anti-seismic measure comprises the following steps: a longitudinal-beam falling prevention stop block, a longitudinal-beam connecting device, a transverse-beam falling prevention stop block and a longitudinal + transverse-lead rubber support;
the longitudinal-steel bracket beam falling prevention device adopts a pier, a table cap or a bent cap to install a steel bracket for longitudinal adjustment, and comprises:
the steel bracket is connected with the top of the cross section of the pier column, arranged on the side surface of the top of the cross section of the pier column and used for increasing the width of a bearing surface of a bearing connection part;
the bracket stop blocks are arranged on two sides of the steel bracket and used for limiting the transverse displacement of the main beam under the action of an earthquake;
the rubber cushion block is arranged above the steel bracket and used for preventing the girder from being broken when the girder falls on the steel bracket after the support is separated, so that the connection buffering effect is achieved;
the bolt and the steel pull rod are used for connecting and anchoring the steel bracket main body and the pier stud; and
the embedded steel plates with different sizes are used for connecting the main body structure of the steel bracket with the pier stud;
the longitudinal-beam connecting device is arranged on the outer side of a steel box girder web plate and used for reinforcing the connection of adjacent steel box girders, and the longitudinal-beam connecting device comprises:
the steel bar is used as a bearing component and an assembling axis;
the spherical panel is used for adjusting the axis rotation angle of the adjacent beam bodies;
the spring and the buffer rubber ring are used for buffering the impact force of the device;
the anti-corrosion filler is used for preventing corrosion inside the connecting beam device;
the protective cover is used for providing a device closed space and preventing corrosion;
the steel plates N1 and N2, cushion blocks and bolts are used for connecting the device;
the longitudinal-beam connecting devices are symmetrically arranged in every two adjacent steel box beams, the steel rods penetrate through end transverse clapboards of the two steel box beams, and the longitudinal-beam connecting devices are sequentially provided with a steel plate N1, a spherical panel, a buffer rubber ring, a cushion block and a bolt from the middle of the two adjacent steel box beams to the outside; the spring is arranged between the buffer rubber ring and the cushion block, and is partially sleeved on the buffer rubber ring;
the steel plate N1 is vertically arranged, the steel plate N2 surrounds the periphery of the steel plate N1 and forms a closed space with the protective cover and the steel plate N1, the protective cover is parallel to the steel plate N1 and is perpendicular to the steel bar and the steel plate N2, and the closed space is used for closing the spherical panel, the spring, the buffer rubber ring, the cushion block and the bolt;
wherein, the anti-rust filling material covers the surface of the steel bar between two adjacent steel plates N1;
the transverse partition plate at the end of the steel box girder is a steel plate N1;
the middle of the two adjacent steel box girders is a position corresponding to a space between two steel plates N1 of the two adjacent steel box girders;
the transverse-anti-falling beam stop block comprises a primary stop block, a secondary stop block and a steel box beam side stop block,
the primary check block is arranged on the inner side of the steel cushion stone along the transverse direction of the bridge and is positioned below the steel box girder;
the secondary stop block is arranged at a pier, a table cap or a cover beam of the bridge spanning the fracture zone and is of a reinforced concrete structure, and a rubber cushion block is arranged at the upper part of the secondary stop block and collides with the side stop block of the steel box girder to bear force;
the steel box girder side stop block is arranged at the lower part of the steel box girder, corresponds to the secondary stop block, comprises a plurality of steel plates with different sizes, and is assembled into the stop block by adopting the corresponding steel plates with different sizes according to the self weight of the upper structure and the earthquake fortification standard; the steel box girder side stop blocks and the steel box girder are manufactured in advance, and all steel plate connections are welded;
the bridge is characterized in that a reserved part is arranged at the transverse pier, the platform cap or the capping beam for transverse linear adjustment, the width value of the bridge is determined by the maximum dislocation of a fracture zone at a bridge site, and the length and the height of the bridge are consistent with the size of the pier, the platform cap or the capping beam;
wherein the space between the secondary stop block and the main beam forms the reserved part.
2. A three-way adjustable earthquake-resistant system according to claim 1, wherein said vertical-removable steel padstones are welded from steel plates and filled with micro-expansive concrete.
3. A three-way adjustable seismic system according to claim 1, wherein the connection of components in the longitudinal-steel bracket drop guard comprises: arranging an embedded steel plate on the top of the cross section of the pier stud; the steel bracket main body structure is welded and connected with the pier top embedded steel plate; the steel bracket is provided with accessories which comprise a bracket stop block and a rubber cushion block.
4. The three-way adjustable seismic system of claim 1, wherein said longitudinal-drop beam stop comprises a first steel plate, a second steel plate, and a rubber pad, wherein,
the first steel plate is vertically arranged at the bottom of the steel box girder and is perpendicular to the steel box girder, and is used for providing a connecting platform, so that the steel box girder, the second steel plate and the rubber block are connected with the steel box girder to form a stop block;
the second steel plates are arranged at the bottom of the steel box girder at intervals with the same distance and are vertical to the first steel plates vertical to the steel box girder, and the second steel plates are of a bearing structure and resist the impact force generated by earthquake;
the rubber cushion block is arranged on the vertical first steel plate and used as a buffer device to slow down impact force when the stop dog collides with the cushion stone.
5. The three-way adjustable seismic system of claim 4, wherein the connection between the portions of the longitudinal-drop beam stop block comprises: the first steel plate connected with the steel box girder is manufactured in advance together with the steel box girder in a pre-buried welding mode; the first steel plate is connected with the second steel plate in a welding mode; the first steel plate is connected with the rubber cushion block in an adhesion mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910310772.8A CN110331652B (en) | 2019-04-17 | 2019-04-17 | Three-way adjustable anti-seismic system for bridge crossing fracture zone |
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| CN201910310772.8A CN110331652B (en) | 2019-04-17 | 2019-04-17 | Three-way adjustable anti-seismic system for bridge crossing fracture zone |
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| CN110331652B true CN110331652B (en) | 2021-01-19 |
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| CN111676795B (en) * | 2020-06-29 | 2021-12-21 | 中铁二院工程集团有限责任公司 | Steel-concrete mixed combined continuous rigid frame bridge |
| CN115323943B (en) * | 2022-09-02 | 2023-05-16 | 防灾科技学院 | Fracture-resistant device of reverse fault bridge crossing based on hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08120620A (en) * | 1994-10-24 | 1996-05-14 | P S Co Ltd | Block manufacturing device of short line type |
| CN102747685A (en) * | 2011-04-19 | 2012-10-24 | 中交公路规划设计院有限公司 | Multifunctional comprehensive restraint device for whole construction and operation process of long-span hybrid-beam cable-stayed bridge |
| CN205347964U (en) * | 2016-01-04 | 2016-06-29 | 湖北工业大学 | Multidirectional spacing roof beam device of preventing falling of bridge |
| CN205934696U (en) * | 2016-08-01 | 2017-02-08 | 黄艳平 | Roof beam is public road bridge roof beam anti -girder -falling stop device of rod iron formula even |
| CN106368115B (en) * | 2016-09-28 | 2018-08-24 | 同济大学 | A kind of shock isolation system suitable for medium and small span beam bridge |
| CN106436559B (en) * | 2016-11-18 | 2019-02-01 | 南昌大学 | A kind of suitable bridge is to low-yield steel energy-dissipating type bridge shock-proof check block structure and method for arranging |
| CN106436558A (en) * | 2016-11-18 | 2017-02-22 | 南昌大学 | Three-way limiting buffering bridge anti-seismic stop dog structure and arranging and installing method |
| CN206521695U (en) * | 2017-01-10 | 2017-09-26 | 中国公路工程咨询集团有限公司 | A kind of bridge adjustable steel pinner device for meizoseismal area |
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