CN111764260A - Bridge buffer and antidetonation bridge that takes precautions against earthquakes - Google Patents
Bridge buffer and antidetonation bridge that takes precautions against earthquakes Download PDFInfo
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- CN111764260A CN111764260A CN202010774094.3A CN202010774094A CN111764260A CN 111764260 A CN111764260 A CN 111764260A CN 202010774094 A CN202010774094 A CN 202010774094A CN 111764260 A CN111764260 A CN 111764260A
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- 230000035939 shock Effects 0.000 claims abstract description 50
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 230000003139 buffering effect Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 71
- 239000010959 steel Substances 0.000 claims description 71
- 239000004570 mortar (masonry) Substances 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 7
- 230000009471 action Effects 0.000 description 14
- 238000006073 displacement reaction Methods 0.000 description 13
- 230000004044 response Effects 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
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Classifications
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of bridge earthquake resistance, in particular to a bridge earthquake-proof buffer device and an earthquake-proof bridge, wherein the bridge earthquake-proof buffer device comprises a shock absorption buffer cushion block, one side of the shock absorption buffer cushion block is provided with a stop block, and the stop block is fixedly connected with the shock absorption buffer cushion block; the anti-seismic bridge comprises a plurality of piers and abutments, main beams are arranged above the piers and the abutments, at least two bridge anti-seismic buffer devices are fixedly connected to the abutments, the bridge anti-seismic buffer devices are respectively arranged on two sides of the main beams along the transverse direction, and one side provided with the shock-absorbing buffer cushion blocks faces the main beams; the bridge buffer that takes precautions against earthquakes is through being fixed in the abutment with the dog on, and utilizes the buffering crashproof effect of shock attenuation cushion, has alleviateed the horizontal impact effect of girder, has improved the horizontal anti-seismic performance of bridge, has improved the security of bridge construction, sets up the construction of also being convenient for on the abutment in addition, and the engineering cost who drops into is also less.
Description
Technical Field
The invention relates to the technical field of bridge earthquake resistance, in particular to a bridge earthquake-proof buffer device and an earthquake-proof bridge.
Background
Under the action of earthquake force, a main beam of the bridge constructed in a high-intensity earthquake area can generate great earthquake response in the longitudinal direction and the transverse direction, and the safety of the bridge structure is very adversely affected. The longitudinal direction and the transverse direction respectively refer to the forward bridge direction and the transverse bridge direction.
Therefore, the bridge structure needs to have higher seismic performance, and the traditional seismic method is realized by absorbing seismic energy through elastic-plastic deformation of a member. In order to meet the seismic requirements of bridge structures, a method of increasing the section of a member or enhancing the structural rigidity is often adopted, the traditional method is effective in many times, but with the increasing span of the bridge structure, particularly for bridges with the span exceeding 150 meters, namely large-span bridges, the section of the member or the structural rigidity is increased once in high-intensity areas, huge engineering cost is invested, and the actual working condition is inconvenient for construction.
Disclosure of Invention
The invention aims to: aiming at the problems that in the prior art, for a large-span bridge, under the action of earthquake force, the longitudinal direction and the transverse direction of a main beam can generate large earthquake response, and the safety of a bridge structure is affected very adversely, a bridge shockproof buffer device and an earthquake-resistant bridge are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a bridge buffer that takes precautions against earthquakes, includes shock attenuation cushion block, one side of shock attenuation cushion block is equipped with the dog, the dog with shock attenuation cushion block fixed connection.
When the shock absorption and buffering device is used, the bridge shock absorption and buffering device is fixed on a bridge abutment of a bridge and is arranged on two sides of a main beam along the transverse direction, one side provided with the shock absorption and buffering cushion block faces the main beam, and under the action of seismic force, the main beam can generate larger seismic response in the longitudinal direction and the transverse direction; because the girder span of large-span bridge is great and its dead weight is great, consequently the shockproof buffer of bridge is provided with the dog, the dog is rigid structure, just the dog with abutment fixed connection plays rigid horizontal shock attenuation effect, is used for resisting the horizontal impact force when girder receives the seismic force effect.
The bridge shockproof buffer device is characterized in that the stop block is fixed on the bridge abutment, the buffer and anti-collision effects of the shock absorption buffer cushion block are utilized, the transverse impact effect of the girder is reduced, the transverse displacement of the girder generated under the action of the seismic force is reduced, the transverse rigidity of the bridge is ensured to meet the seismic displacement control design requirement, the transverse seismic performance of the bridge is improved, the safety of the bridge structure is improved, the bridge shockproof buffer device is arranged on the bridge abutment, and the construction cost is low.
As a preferable scheme of the invention, a plurality of flexible mortar columns are vertically arranged in the block, and the flexible mortar columns are arranged in the block at intervals. The flexible mortar column is a column structure formed by filling flexible mortar, the flexible mortar column is vertically arranged in the stop block, a flexible structure is added in the rigid structure, impact energy is further consumed, and the vertical arrangement is favorable for transmitting and absorbing transverse energy in the stop block and is also favorable for ensuring the stability of the stop block structure.
As a preferable scheme of the invention, the shock absorption cushion block is a polyurethane cushion block or a shock absorption rubber cushion block. As a buffering and anti-collision measure, the wear-resisting shock absorber has good wear resistance, long service life and good shock absorption effect.
As a preferred scheme of the present invention, a perforated steel bar penetrates through the damping cushion block, an embedded steel bar is arranged in the stopper, and the embedded steel bar is fixedly connected to the perforated steel bar, and preferably, the embedded steel bar is welded to the perforated steel bar to establish a strong connection between the damping cushion block and the stopper.
As a preferable scheme of the invention, the outer side surface of the shock absorption cushion block is also provided with a positioning steel bar, and the positioning steel bar is fixedly connected with the perforated steel bar. For better positioning of the cushion blocks.
Specifically, the embedded steel bar perpendicular to shock attenuation cushion sets up, the perforation reinforcing bar runs through shock attenuation cushion and level set up, just the perforation reinforcing bar with the embedded steel bar is perpendicular, the two welding, makes shock attenuation cushion with the dog is connected, the vertical being equipped with of shock attenuation cushion lateral surface positioning bar will positioning bar with the perforation reinforcing bar the embedded steel bar welding is further fixed shock attenuation cushion's position.
As a preferable scheme of the invention, a third embedded steel plate is arranged on the stop block, and the third embedded steel plate is positioned between the damping cushion block and the stop block. Due to the fact that the third embedded steel plate is arranged and the rigidity of the third embedded steel plate is high, impact received by the damping cushion block is transmitted to the third embedded steel plate firstly, and the stop block is prevented from being damaged by collision.
As the preferred scheme of the invention, the stop block is of a concrete structure, the flexible mortar column is a cement mortar column, and the cement mortar column is of a column structure formed by filling cement mortar.
The utility model provides an anti-seismic bridge, includes a plurality of pier and abutment, the pier with the abutment top is equipped with the girder, every fixedly connected with is two at least on the abutment the shockproof buffer of bridge, the shockproof buffer of bridge respectively along transversely set up in the both sides of girder, and be equipped with one side orientation of shock attenuation cushion block the girder.
Because the bridge shockproof buffer devices are respectively arranged on the two transverse sides of the main beam, the shock absorption buffer cushion blocks are utilized to reduce the seismic response of the main beam transversely generated under the action of the seismic force, the transverse impact action of the main beam is reduced, the transverse rigidity of the bridge is ensured to meet the design requirement of seismic displacement control, the transverse shock resistance of the bridge is improved, and the safety of the bridge structure is improved.
As a preferable scheme of the invention, a support cushion stone is fixedly connected to the abutment, a support is arranged on the support cushion stone, and the main beam is placed on the support.
According to the preferable scheme, two sides of the main beam are respectively provided with four embedded steel plates, the four embedded steel plates are matched with the damping cushion block to prevent the main beam from being damaged by collision, and stainless steel plates are arranged outside the four embedded steel plates to prevent the four embedded steel plates from being corroded and damaged.
As a preferred scheme of the invention, expansion joints are arranged between the two ends of the main beam and the bridge abutment, and a longitudinal constraint structure is arranged between the main beam and the bridge abutment. Because be equipped with the expansion joint between girder both ends and the abutment, give the earthquake response that the girder vertically produced has reserved the space, the girder with be equipped with longitudinal restraint structure between the abutment, improved the longitudinal rigidity of girder, the cooperation girder sets up on horizontal the shockproof buffer of bridge has ensured the longitudinal rigidity and the transverse rigidity homoenergetic of bridge system can satisfy earthquake displacement control design needs jointly, simultaneously, under the prerequisite of guaranteeing bridge structures's safety, has correspondingly reduced the vertical antidetonation design calculation internal force of pier, has improved bridge structures's antidetonation design intensity and rigidity, has improved bridge structures's security.
As a preferable scheme of the invention, the longitudinal constraint structure comprises a first embedded steel plate and a first binaural fork which are connected to the main beam, and a second embedded steel plate and a second binaural fork which are connected to the bridge abutment, and a prestressed steel beam or a damper is connected between the first binaural fork and the second binaural fork. The damper takes viscous materials as damping media, consumes seismic energy along the longitudinal direction of the main beam, and improves the longitudinal seismic performance of the bridge.
As a preferred scheme of the invention, the anti-seismic bridge is a steel pipe concrete mixed continuous rigid frame bridge.
As a preferable scheme of the invention, a pile foundation is arranged below the abutment and is used for being stably connected with the ground.
In summary, due to the adoption of the technical scheme, the bridge shockproof buffer device has the beneficial effects that:
in the transverse bridge direction, the bridge shockproof buffer device comprises the shock absorption buffer cushion blocks which are arranged on two transverse sides of the main beam, so that the main beam is subjected to displacement or shaking under the action of seismic force in the transverse direction, and the transverse impact of the main beam can be relieved through the shock absorption buffer cushion blocks; because the girder span of large-span bridge is great and its dead weight is great, consequently the shockproof buffer of bridge is provided with the dog, the dog is rigid structure, just the dog with abutment fixed connection plays rigid horizontal shock attenuation effect, is used for resisting the horizontal impact force when girder receives the seismic force effect.
The bridge shockproof buffer device is characterized in that the stop block is fixed on the bridge abutment, the buffer and anti-collision effects of the shock absorption buffer cushion block are utilized, the transverse impact effect of the girder is reduced, the transverse displacement of the girder generated under the action of the seismic force is reduced, the transverse rigidity of the bridge is ensured to meet the seismic displacement control design requirement, the transverse seismic performance of the bridge is improved, the safety of the bridge structure is improved, the bridge shockproof buffer device is arranged on the bridge abutment, and the construction cost is low.
The anti-seismic bridge has the beneficial effects that:
the bridge anti-seismic buffer devices are respectively arranged on two transverse sides of the main beam, so that the seismic response of the main beam in the transverse direction under the action of a seismic force is reduced by using the shock-absorbing buffer cushion blocks, the transverse impact action of the main beam is reduced, the transverse rigidity of the bridge can meet the design requirement of seismic displacement control, and the transverse anti-seismic performance of the bridge is improved; because be equipped with the expansion joint between girder both ends and the abutment, give the earthquake response that the girder vertically produced has reserved the space, the girder with be equipped with longitudinal restraint structure between the abutment, improved the longitudinal rigidity of girder, guaranteed that the longitudinal rigidity and the transverse rigidity of bridge system all can satisfy earthquake displacement control design needs, simultaneously, under the prerequisite of guaranteeing bridge structures's safety, correspondingly reduced the vertical antidetonation design calculation internal force of pier, improved bridge structures's antidetonation design intensity and rigidity, improved bridge structures's security.
Drawings
Fig. 1 is a schematic structural view of the bridge anti-vibration buffer device according to the present invention.
FIG. 2 is a schematic view of the bridge anti-vibration buffer device of the present invention in cooperation with a main beam.
Fig. 3 is a layout view of the bridge anti-vibration buffer device according to the present invention along the transverse bridge direction.
Fig. 4 is a schematic representation of the arrangement of the longitudinal restraint features of the present invention along the downbridge direction.
Icon: 1-damping cushion blocks; 2-a block; 21-flexible mortar column; 31-embedding reinforcing steel bars; 32-perforated steel bars; 33-positioning the steel bars; 41-embedding a first steel plate; 42-embedding a second steel plate; 43-embedding a steel plate III; 44-embedding a steel plate IV; 5-stainless steel plate; 6, a main beam; 61-a support; 62-support base stone; 7-bridge abutment; 8-pile foundation; 9-bridge shockproof buffer device; 10-a damper; 11-a double-lug fork I; 12-two ears fork two.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-3, a bridge shockproof buffer device comprises a shock absorption buffer cushion block 1, wherein the shock absorption buffer cushion block 1 is a polyurethane cushion block or a shock absorption rubber cushion block, a stop block 2 is arranged on one side of the shock absorption buffer cushion block 1, the stop block 2 is of a concrete structure, a plurality of flexible mortar columns 21 are vertically arranged in the stop block 2, the flexible mortar columns 21 are arranged in the stop block 2 at intervals, and the flexible mortar columns 21 are cement mortar columns.
And a third embedded steel plate 43 is arranged on the stop block 2, and the third embedded steel plate 43 is positioned between the damping cushion block 1 and the stop block 2.
As shown in fig. 3, the bridge shockproof buffer device 9 is fixed on the bridge abutment 7, two sides of the main beam 6 are respectively provided with one bridge shockproof buffer device 9, one side of the shock absorption buffer cushion block 1 faces the main beam 6, the shock absorption buffer cushion block 1 is utilized to reduce the seismic response of the main beam 6 generated under the action of the seismic force, the transverse impact action of the main beam 6 is reduced, the transverse rigidity of the bridge is ensured to meet the design requirement of seismic displacement control, and the transverse seismic performance of the bridge is improved. The specific construction method comprises the following steps: prefabrication girder 6 and dog 2, girder 6 sets up four 44 of pre-buried steel sheet, dog 2 sets up three 43 of pre-buried steel sheet, embedded steel bar 31 and flexible mortar post 21, will perforated steel bar 32 runs through shock attenuation cushion 1, and will 1 of shock attenuation cushion install extremely one side of dog 2, the welding embedded steel bar 31 with perforated steel bar 32 sets up again positioning bar 33, and with embedded steel bar 31 perforated steel bar 32 welds.
Example 2
As shown in fig. 2-4, an anti-seismic bridge comprises a plurality of piers and abutments 7, wherein main beams 6 are arranged above the piers and the abutments 7, each abutment 7 is fixedly connected with a support cushion stone 62, a support 61 is arranged on the support cushion stone 62, and the main beams 6 are arranged on the support 61. And a pile foundation 8 is connected below the abutment 7 and is fixedly connected with the ground.
Every fixedly connected with is two on the abutment 7 the shockproof buffer of bridge 9, the shockproof buffer of bridge 9 respectively along transversely set up in the both sides of girder 6, and be equipped with one side orientation of shock attenuation cushion 1 girder 6, the both sides of girder 6 are equipped with four pre-buried steel sheets 44 respectively, four pre-buried steel sheets 44 with 1 looks adaptation of shock attenuation cushion, four outer still covers of pre-buried steel sheet has stainless steel sheet 5, is used for preventing four 44 corrosion damages of pre-buried steel sheet.
As shown in fig. 4, expansion joints are provided between two ends of the main beam 6 and the bridge abutment 7, and a longitudinal constraint structure is provided between the main beam 6 and the bridge abutment 7. The longitudinal constraint structure comprises a first embedded steel plate 41 and a first binaural fork 11 which are connected to the main beam 6, and a second embedded steel plate 42 and a second binaural fork 12 which are connected to the bridge abutment 7, wherein a damper 10 is connected between the first binaural fork 11 and the second binaural fork 12.
The construction steps of the longitudinal restraint structure comprise: embedding the bolts and the second embedded steel plates 42 matched with the double-lug forks 12 into the bridge abutment 7, positioning by using the second embedded steel plates 42, and paying attention to firm welding of the bolts and the reinforcing mesh in the concrete; then, the two lug forks 12 are firmly connected with the bolts through nuts, the bolts matched with the two lug forks 11 and the embedded steel plates 41 are embedded into the bottom of the main beam 6, the embedded steel plates 41 are used for positioning, and the bolts and the reinforcing mesh in the concrete are firmly welded; the double-lug fork I11 is firmly connected with the bolt through a nut; and hoisting the damper 10 in place, and finally, firmly connecting the damper 10 with the first double-lug fork 11 and the second double-lug fork 12 by using a steel pin, a thin nut and a cotter pin.
In this embodiment, the anti-seismic bridge is a steel tube concrete mixed continuous rigid frame bridge.
In order to further explain the improvement effect of the bridge shockproof buffer device on the performance of the shockproof bridge, the invention is characterized in that the longitudinal displacement of a main beam and the bending moments of the pier bottoms of No. 1, No. 2 and No. 3 main piers are compared when the three-span continuous rigid frame girder bridge is added with the bridge shockproof buffer device and is not added with the bridge shockproof buffer device under the action of E2 earthquake, and the comparison data are shown in the following table;
table: bridge seismic response comparison
As can be seen from the above table, after the bridge shockproof buffer device disclosed by the invention is adopted, under the action of earthquake load, the longitudinal displacement of the main beam is effectively reduced, the amplitude of reduction reaches 45.5%, the bending moment of the bridge pier is obviously reduced, and the reduced range value is about 33.1-39.8%. The overall performance of the bridge can better meet the requirements of seismic displacement control and internal force design.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a bridge buffer that takes precautions against earthquakes, its characterized in that, includes shock attenuation cushion block (1), one side of shock attenuation cushion block (1) is equipped with dog (2), dog (2) with shock attenuation cushion block (1) fixed connection.
2. The bridge shock-proof buffer device according to claim 1, wherein a plurality of flexible mortar columns (21) are vertically arranged in the block (2), and a plurality of flexible mortar columns (21) are arranged in the block (2) at intervals.
3. The bridge antivibration buffer device of claim 1, wherein the cushion block (1) is a polyurethane block or a rubber block.
4. The bridge anti-vibration buffer device according to claim 1, wherein a perforated steel bar (32) penetrates through the shock absorption buffer cushion block (1), an embedded steel bar (31) is arranged in the stop block (2), and the embedded steel bar (31) is fixedly connected with the perforated steel bar (32).
5. The bridge anti-vibration buffer device according to claim 4, wherein a positioning steel bar (33) is further disposed on an outer side surface of the shock absorption buffer cushion block (1), and the positioning steel bar (33) is fixedly connected with the perforated steel bar (32).
6. The bridge shock-proof buffering device according to claim 1, wherein a third pre-embedded steel plate (43) is arranged on the stop block (2), and the third pre-embedded steel plate (43) is located between the shock-proof buffering cushion block (1) and the stop block (2).
7. An anti-seismic bridge, comprising a plurality of bridge piers and bridge abutments (7), wherein main beams (6) are arranged above the bridge piers and the bridge abutments (7), and the anti-seismic bridge is characterized in that at least two bridge anti-seismic buffer devices according to any one of claims 1 to 6 are fixedly connected to each bridge abutment (7), and are respectively arranged on two sides of each main beam (6) along the transverse direction, and one side provided with the shock-absorbing buffer cushion blocks (1) faces the main beams (6).
8. An anti-seismic bridge according to claim 7, characterized in that four embedded steel plates (44) are respectively arranged on two sides of the main beam (6), the four embedded steel plates (44) are matched with the damping cushion block (1), and a stainless steel plate (5) is further arranged outside the four embedded steel plates (44).
9. An earthquake-resistant bridge according to claim 7, wherein expansion joints are arranged between the two ends of the main beam (6) and the abutment (7), and a longitudinal restraining structure is arranged between the main beam (6) and the abutment (7).
10. An earthquake-resistant bridge according to claim 9, wherein the longitudinal restraint structure comprises a first embedded steel plate (41) and a first binaural fork (11) connected to the main beam (6), and a second embedded steel plate (42) and a second binaural fork (12) connected to the abutment (7), and prestressed steel bundles or dampers are connected between the first binaural fork (11) and the second binaural fork (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774094.3A CN111764260A (en) | 2020-08-04 | 2020-08-04 | Bridge buffer and antidetonation bridge that takes precautions against earthquakes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010774094.3A CN111764260A (en) | 2020-08-04 | 2020-08-04 | Bridge buffer and antidetonation bridge that takes precautions against earthquakes |
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| Publication Number | Publication Date |
|---|---|
| CN111764260A true CN111764260A (en) | 2020-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010774094.3A Pending CN111764260A (en) | 2020-08-04 | 2020-08-04 | Bridge buffer and antidetonation bridge that takes precautions against earthquakes |
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| Country | Link |
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| CN (1) | CN111764260A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112523068A (en) * | 2020-12-04 | 2021-03-19 | 北京城建道桥建设集团有限公司 | Mounting and fixing structure and construction method of inverted T-shaped bent cap damping chloroprene rubber sheet |
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| CN112523068A (en) * | 2020-12-04 | 2021-03-19 | 北京城建道桥建设集团有限公司 | Mounting and fixing structure and construction method of inverted T-shaped bent cap damping chloroprene rubber sheet |
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