阅读说明：本技术 抗倾减震复合限位装置及桥梁 (Anti-inclination damping composite limiting device and bridge ) 是由 周志祥 周劲宇 徐略勤 邹杨 张承 衡俊霖 于 2019-10-25 设计创作，主要内容包括：本发明公开了一种抗倾减震复合限位装置及桥梁,包括用于固定连接于主梁的上结构件和固定连接于桥墩盖梁端部的下结构件,上结构件和下结构件之间相互为嵌套扣合连接；本发明采用针对性的固定结构,在偏载作用下,能够明显提高主梁抗侧翻倾覆破坏的能力；在超限偏载作用下,根据设置可以实现自动预警；在地震作用下,通过本装置实现有效减震,以最大限度降低桥梁地震损害及落梁；在严重超限偏载作用下,使墩与梁瞬态体系倾覆破坏转化为本装置的连接构件材料破坏,将结构稳定问题转化为构件强度问题,使没有征兆的破坏模式转变为有征兆的塑性破坏,便于破坏过程的及时发现并采取应急措施。(The invention discloses an anti-tilt shock-absorption composite limiting device and a bridge, which comprise an upper structural member and a lower structural member, wherein the upper structural member is fixedly connected to a main beam, the lower structural member is fixedly connected to the end part of a pier capping beam, and the upper structural member and the lower structural member are mutually nested and buckled; the invention adopts a targeted fixed structure, and can obviously improve the capability of the main beam for resisting rollover, overturning and damage under the action of unbalance loading; under the effect of overrun unbalance loading, automatic early warning can be realized according to the setting; under the action of earthquake, the device realizes effective shock absorption so as to reduce the earthquake damage and beam falling of the bridge to the maximum extent; under the action of severe overrun unbalance loading, the transient system overturn and damage of the pier and the beam are converted into the material damage of the connecting component of the device, the structural stability problem is converted into the component strength problem, the damage mode without signs is converted into plastic damage with signs, and the timely discovery of the damage process is facilitated and emergency measures are taken.)

1. The utility model provides an anti compound stop device of shock attenuation that inclines which characterized in that: including the last structure and the lower structure of fixed connection in pier bent cap tip that are used for fixed connection in the girder, each other is nested lock connection between last structure and the lower structure.

2. The anti-tilt shock absorbing compound stop device according to claim 1, wherein: the connection between the upper and lower structural members has a relative movement gap along a set range of longitudinal, lateral and vertical directions.

3. The anti-tilt shock absorbing compound stop device according to claim 2, wherein: the buckling structure between the upper structural member and the lower structural member adopts a T-shaped groove and a T-shaped structural member.

4. The anti-tilt shock absorbing compound stop device according to claim 3, wherein: the lower structural part is a T-shaped structural part with a T-shaped cross section and comprises a wing plate and a web plate, the web plate is used for fixedly connecting corresponding positions of the end parts of the bridge pier capping beams, the upper structural part comprises a T-shaped groove component and a fixing plate, the T-shaped groove component is provided with a T-shaped groove which is matched with the T-shaped structural part to form a nested buckling structure, and the fixing plate is used for fixing the T-shaped groove component to the main beam; the wing plates are matched with the T-shaped grooves to form set gaps which can slide longitudinally, transversely and vertically.

5. The anti-tilt shock absorbing compound stop device according to claim 4, wherein: the web plate is vertically arranged along the longitudinal direction, and the wing plates are horizontally arranged along the longitudinal direction; the lower part of the T-shaped groove component forms a longitudinal strip-shaped opening matched with the web plate.

6. The anti-tilt shock absorbing compound stop device according to claim 5, wherein: damping blocks are respectively arranged in the T-shaped groove corresponding to the two longitudinal ends of the wing plate, and a set distance is correspondingly arranged between each damping block and the two longitudinal ends of the wing plate. .

7. The anti-tilt shock absorbing compound stop device according to claim 5, wherein: the T-shaped groove component is of an integral structure; or a detachable end cover is arranged at one longitudinal end of the T-shaped groove member, an end opening for guiding the wing plate to be installed into the T-shaped groove is formed corresponding to the end cover, and the strip-shaped opening is communicated with the end opening.

8. The anti-tilt shock absorbing compound stop device according to claim 5, wherein: a sealing cover with a set length is detachably arranged on the strip-shaped opening corresponding to the opening end of the T-shaped groove member;

the sealing cover is a T-shaped sealing cover, a web plate of the T-shaped sealing cover is embedded into the strip-shaped opening, and two flanges are covered on two sides of the strip-shaped opening and fixed through bolts; or the sealing cover is a rectangular sealing cover, the rectangular sealing cover is embedded into the strip-shaped opening and is fixed through bolts penetrating through two sides of the strip-shaped opening and the rectangular sealing cover;

when the fixing plate is used, the fixing plate is anchored at the bottom of the corresponding main beam through the upper anchoring bolt; or, the fixed plate is pre-buried at the bottom of the corresponding main beam through the anchoring steel bars fixedly arranged on the newly-built bridge; the web is anchored at the end part of the pier capping beam through a lower anchoring bolt.

9. The anti-tilt shock absorbing compound stop device according to claim 8, wherein: still include automatic alarm system, include:

the signal acquisition unit is used for acquiring tension signals of the upper structural part or/and the lower structural part in the vertical direction;

the central processing unit is used for receiving and processing the tension signal transmitted by the signal acquisition unit;

and the output unit receives and outputs the command signal of the central processing unit.

10. A bridge, characterized in that: the bridge comprises a pier and a main beam, and the anti-tilt shock-absorbing composite limiting device is installed between the two ends of the bent cap of the pier and the bottom of the main beam respectively.

Technical Field

The invention belongs to the field of bridge engineering, and particularly relates to an anti-inclination and shock-absorption composite limiting device for a bridge and the bridge.

Background

In order to save and fully utilize space, the urban bridge mostly adopts a multi-span continuous wide girder as an upper structure, the middle piers are mostly single-column piers or frame type piers with smaller transverse bridge width, and the transverse side-turning, overturning and instability damage of the girder is easy to occur under the accidental overload and unbalance loading effects. The following basic features exist for this type of accident: (1) the upper structure adopts an integral wide box girder, the structural system is a continuous girder, the abutment or the transition pier adopts double supports or three supports, and the middle pier adopts double supports or independent single supports with smaller transverse support distance; (2) only a support which can only transmit pressure is arranged between the main beam and the pier, and no measures are needed for resisting overturning; (3) the bridge is overturned, collapsed and damaged under severe unbalance loading and overload condition, and the bridge body slides from the pier without any sign; (4) the bridge has no abnormal condition before the accident, and the bridge pier and the main beam have no obvious structural material damage after the accident. Therefore, it is imperative to adopt effective anti-overturning measures for new construction and viaducts in active cities to avoid such accidents.

The whole overturning of the wide-width bridge is caused by the transverse rotation displacement of the beam body, and the transverse rotation displacement is related to the earthquake damage of the bridge superstructure in a high-intensity area. In the past destructive earthquake, the reasons for the falling beam earthquake damage of the bridge superstructure are as follows: (1) the relative displacement of the pier beam exceeds the lap length of the support; (2) the distance between the upper structures of adjacent spans is too small, and the upper structures collide with each other; (3) the strength and the deformability of the bridge pier are insufficient, so that the bridge pier is damaged to cause beam falling; (4) the support width of the pier to the upper structure is insufficient, so that the seismic load underbeam body rolls over from the upper side of the pier and slides down. In order to solve the problems, although certain measures for preventing the girder from falling off due to earthquake are adopted at home at present, the conventional device for preventing the girder from falling off mainly focuses on horizontal limiting measures for preventing the girder from falling off along the longitudinal direction and the transverse direction of the bridge under the action of earthquake, and no comprehensive technical measures for effectively resisting the longitudinal and transverse sliding-off of the girder relative to the bridge pier and the side-turning sliding-off of the girder are available so far.

Both of the above two types of damage phenomena are caused by the fact that the displacement of the main beam relative to the pier exceeds the allowable range. The lateral overturning is mainly caused by the transverse rotation displacement of the beam body, the earthquake beam falling is mainly caused by the overlarge horizontal longitudinal and transverse displacements of the beam body, and the lateral overturning and the earthquake beam falling can improve the resistance of the bridge through a reasonable limiting device.

Therefore, the supporting connection structure between the bridge pier and the bridge body of the bridge needs to be improved, so that the supporting connection structure can provide a resisting moment for resisting side turning and overturning for the bridge body, and can meet the requirements of longitudinal and transverse displacement and limitation of the bridge body under the action of an earthquake; the device has simple structure, clear force transmission path and low cost, is convenient for construction, installation, maintenance and replacement, and can be used for building a new bridge and transforming the existing bridge; the bridge is changed from transient system destruction without warning to structural material destruction with obvious warning, thereby obviously improving the operation safety of the bridge and having obvious technical, economic and social comprehensive benefits.

Disclosure of Invention

In view of the above, the invention aims to provide an anti-tilting and shock-absorbing composite limiting device and a bridge, which can not only remarkably improve the anti-rollover and anti-overturning capability of a beam body under accidental deflection and overload, but also meet the requirements of longitudinal and transverse displacement and limitation of the beam body under the action of an earthquake under the condition that the normal use condition of the bridge is not influenced; the device has simple structure, clear force transmission path and low cost, is convenient for construction, installation, maintenance and replacement, and can be used for building a new bridge and transforming the existing bridge; the bridge is changed from transient system destruction without warning to material destruction with obvious warning, thereby obviously improving the operation safety of the bridge and having obvious technical, economic and social comprehensive benefits.

The anti-tilting and shock-absorbing composite limiting device comprises an upper structural member fixedly connected to a main beam and a lower structural member fixedly connected to the end part of a pier capping beam, wherein the upper structural member and the lower structural member are mutually nested and buckled.

Further, the connection between the upper and lower structural members has a relative movement gap in a set range of longitudinal, lateral and vertical directions.

Furthermore, the buckling structure between the upper structural member and the lower structural member adopts a T-shaped groove and a T-shaped structural member buckling structure.

Further, the lower structural part is a T-shaped structural part with a T-shaped cross section and comprises a wing plate and a web plate, the web plate is used for fixedly connecting corresponding positions of the end parts of the bridge pier capping beams, the upper structural part comprises a T-shaped groove component and a fixing plate, the T-shaped groove component is provided with a T-shaped groove which is matched with the T-shaped structural part to form a nested buckling structure, and the fixing plate is used for fixing the T-shaped groove component to the main beam; the wing plates are matched with the T-shaped grooves to form set gaps which can slide longitudinally, transversely and vertically.

Further, the web plate is vertically arranged along the longitudinal direction, and the wing plates are horizontally arranged along the longitudinal direction; the lower part of the T-shaped groove component forms a longitudinal strip-shaped opening matched with the web plate.

Furthermore, damping blocks are respectively arranged in the T-shaped groove corresponding to the two longitudinal ends of the wing plate, and a set distance is correspondingly arranged between each damping block and the two longitudinal ends of the wing plate. .

Further, the T-shaped groove member is of an integral structure; or a detachable end cover is arranged at one longitudinal end of the T-shaped groove member, an end opening for guiding the wing plate to be installed into the T-shaped groove is formed corresponding to the end cover, and the strip-shaped opening is communicated with the end opening.

Furthermore, a sealing cover with a set length is detachably arranged on the strip-shaped opening corresponding to the opening end of the T-shaped groove member;

the sealing cover is a T-shaped sealing cover, a web plate of the T-shaped sealing cover is embedded into the strip-shaped opening, and two flanges are covered on two sides of the strip-shaped opening and fixed through bolts; or the sealing cover is a rectangular sealing cover, the rectangular sealing cover is embedded into the strip-shaped opening and is fixed through bolts penetrating through two sides of the strip-shaped opening and the rectangular sealing cover.

Further, when in use, the fixing plate is anchored at the bottom of the corresponding main beam through the upper anchoring bolt; or, the fixed plate is pre-buried at the bottom of the corresponding main beam through the anchoring steel bars fixedly arranged on the newly-built bridge; the web is anchored at the end part of the pier capping beam through a lower anchoring bolt.

Further, still include automatic alarm system, include:

the signal acquisition unit is used for acquiring tension signals of the upper structural part or/and the lower structural part in the vertical direction; the signal acquisition unit generally adopts a tension sensor (such as a strain gauge 3 attached to or implanted in the web 103) for acquiring the deformation of the web in the vertical direction generated when the girder overturns or has an overturning tendency, and outputting a signal to the central processing unit;

the central processing unit is used for receiving and processing the tension signal transmitted by the signal acquisition unit; the central processing unit at least comprises a Central Processing Unit (CPU), a memory and necessary peripheral circuits, realizes the receiving and processing of signals (the strain gauge directly transmits the strain signals to the central processing unit in a wired connection mode, if a wireless transmission mode is adopted, the strain gauge needs to be configured with a processor and wireless transmitting equipment, and the central processing unit needs to be configured with wireless receiving equipment, which is not described herein any more), and outputs command signals to the output unit, when the data signals of the signal acquisition unit exceed a set value, alarm signals are sent, for example, audible and visual alarm equipment (lamps and voice) is arranged on a main beam; the central processing unit is generally fixed on the main beam, and necessary waterproof and dustproof settings are adopted, which are not described herein again;

the output unit is used for receiving and outputting the command signal of the central processing unit, generally comprises on-site audible and visual alarm equipment, remote transmission equipment and the like, and generally adopts a wireless transmission or wired transmission mode to perform remote data transmission, for example, the data signal of the central processing unit is sent to a remote monitoring center (a management center of a bridge, which needs to be provided with wireless receiving equipment) by adopting the wireless transmission equipment and is stored for future reference, which is not described herein again; the operation principle of the wireless signal output device is not described in detail herein. .

The invention also discloses a bridge, which comprises a pier and a main beam, wherein the anti-tilt shock-absorption composite limiting device is arranged between the two ends of the capping beam corresponding to the pier and the bottom of the main beam respectively.

The construction process of the invention is as follows:

for the existing operation bridge, the upper structural part (T-shaped groove component) is fixedly installed at the bottom surface of the set main beam in a bolt implanting connection mode, the T-shaped structural part is embedded into the T-shaped groove of the T-shaped groove component, the slotted end bottom plate is sealed through bolt connection, and finally the web plate of the T-shaped connecting part is fixedly installed on the transverse bridge-direction end face of the pier capping beam in a connection mode of implanting an anchoring bolt.

The device is assembled to a newly-built cast-in-place concrete girder, a web plate of a T-shaped structural member is fixedly arranged on the transverse bridge-direction end face of a pier capping beam in a connecting mode of implanting lower anchoring bolts, beam bottom buckle grooves are fixedly pre-embedded at set positions in turn (anchoring plates are provided with anchoring reinforcing steel bars), the girder concrete is poured, and finally a construction support is detached.

The invention has the beneficial effects that: the anti-tilt shock-absorption composite limiting device and the bridge adopt a targeted fixed structure, and longitudinal, transverse and vertical displacement limiting constraints are respectively formed on the main beam at the two ends of the bridge pier capping beam in the transverse bridge direction, have a set freedom degree gap, and do not influence the requirement of relative displacement between the bridge pier and the main beam under the normal use condition; the main beam can be prevented from rollover, overturning and falling under the condition of serious overload deviation; under the earthquake condition, longitudinal shock absorption between the pier and the main beam can be realized by means of the action of the damping block; under the earthquake condition, the transverse shock absorption between the pier and the main beam can be realized by means of the elastic deformation of the web plate of the T-shaped structural member; under the action of strong earthquake, the connecting device can obviously improve the longitudinal and transverse beam falling and side-turning overturning damage capability of the main beam relative to the bridge pier; particularly, the bridge is likely to have brittle failure caused by transient change of a structural system under the action of accidental overload or earthquake, the bridge is required to undergo plastic failure of the material of the connecting component of the device before the bridge is transformed and damaged, the structural stability problem is transformed into the component strength problem, the damage mode without signs is transformed into plastic failure with signs, and the timely discovery of the damage process is facilitated and emergency measures are taken;

the transverse two sides of the top of the bridge pier respectively form constraint connection with the bridge bottom plate, and the constraint generally sets a clearance with a degree of freedom so as to meet the relative displacement between a main beam and the bridge pier under the normal use condition of the bridge; under the action of unbalance loading, the capability of resisting rollover, overturning and damage of the main beam can be obviously improved; under the effect of overrun unbalance loading, automatic early warning can be realized according to the set early warning system; under the action of earthquake, the device realizes effective shock absorption so as to reduce the earthquake damage and beam falling of the bridge to the maximum extent; under the action of severe overrun unbalance loading, the transient system overturning damage of the pier and the beam is converted into the material damage of a connecting component of the device, the structural stability problem is converted into the component strength problem, the damage mode without signs is converted into plastic damage with signs, and the timely discovery of the damage process is facilitated and emergency measures are taken;

the device integrates the functions of anti-overturning and earthquake limiting, has simple structure, simple and clear principle and detectable appearance, and is beneficial to regularly checking the bridge condition and maintaining; the industrial manufacturing can be realized, so that the cost is reduced, and the large-scale investment is facilitated; the field installation is convenient, the maintenance and the replacement are fast, and the construction period is short. In a word, the device can solve the problem that the comprehensive vehicle overload is not considered in the anti-overturning design in the existing specification, gives consideration to the anti-seismic limiting function, and is expected to prevent the integral unstable overturning and the falling beam seismic damage of the superstructure more favorably, economically and reliably.

Drawings

The invention is further described below with reference to the figures and examples.

FIG. 1 is a schematic longitudinal cross-sectional structure of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a perspective view (integral type) of the lower member structure of the present invention;

FIG. 4 is a perspective view of the construction of the lower member of the present invention (open-ended T-shaped cover plate);

FIG. 5 is a perspective view of the structure of the lower member of the present invention (open-ended rectangular cover plate);

FIG. 6 is a schematic view (in transverse cross-section) of the structure of FIG. 1 in use in a bridge construction;

fig. 7 is a schematic view of the structure of fig. 1 in use in a bridge construction (longitudinal section;

FIG. 8 is a functional block diagram of an alarm system.

Detailed Description

FIG. 1 is a schematic longitudinal sectional view (bolt anchor) of the present invention, and FIG. 2 is a sectional view taken along line A-A of FIG. 1; as shown in the figure: the anti-tilting and shock-absorbing composite limiting device comprises an upper structural member 2 fixedly connected to a main beam a and a lower structural member 1 fixedly connected to the end part of a pier capping beam c, wherein the upper structural member 2 and the lower structural member 1 are mutually connected in a nested and buckled manner; the nested snap-fit connection generally includes a T-head connection structure, a dovetail (tapered structure) connection structure, etc. to form lateral, vertical, and longitudinal constraints, of course, necessary gaps need to be left in each direction; when the device is used, the device is pulled by the device arranged at one end of the pier capping beam, and the device at the other end is pressed to resist the overturning moment, so that the safety of the whole bridge is ensured.

In this embodiment, the connection between upper structure spare 2 and the lower structure spare 1 has along vertical, horizontal and vertical set for the relative movement clearance of scope, has better expend with heat and contract with cold adaptability, still does benefit to and forms the buffering under great vibrations, has better shock attenuation effect, forms girder antidumping and antidetonation spacing restraint device simultaneously.

In this embodiment, the fastening structure between the upper structural member 2 and the lower structural member 1 is a fastening structure of a T-shaped groove and a T-shaped structural member; as shown in the figure, the T-shaped groove is a long-strip-shaped groove along the longitudinal direction, the T-shaped structural member is matched with the T-shaped groove and is also a long-strip-shaped structure along the longitudinal direction, the T-shaped structural member is embedded and buckled in the T-shaped groove, the vertical constraint and the transverse constraint are formed on the structure, and the T-shaped groove is closed, namely the longitudinal constraint is formed; certainly, horizontal, vertical and longitudinal intervals can be reserved in the cooperation structure of T-shaped groove and T shape structure spare, and the relative motion that adaptation expend with heat and contract with cold and vibrations produced does benefit to and avoids suffering vibrations and destroys.

In this embodiment, the lower structural member 1 is a T-shaped structural member with a T-shaped cross section, and includes a wing plate 101 and a web plate 102, the web plate 102 is used to fixedly connect corresponding positions of the end portions of the cap beams of the bridge pier, the upper structural member 2 includes a T-shaped groove member 201 and a fixing plate 202, the T-shaped groove member 201 has a T-shaped groove 2011 that forms a nested fastening structure in cooperation with the T-shaped structural member, and the fixing plate 202 is used to fix the T-shaped groove member 201 to a main beam a (generally, a bottom portion); the wing plate 101 and the T-shaped groove 2011 are matched to form a set gap which can slide longitudinally, transversely and vertically; gaps which meet the requirements of longitudinal, transverse and vertical relative displacement of the pier beam under normal use conditions are reserved between the T-shaped groove 2011 and the T-shaped structural member embedded in the T-shaped groove 2011; as shown in the figure, the T-shaped structural member is a strip-shaped member with a T-shaped cross section, and the T-shaped groove is matched with the T-shaped structural member and is also a strip-shaped groove with a T-shaped cross section; the vertical tensile bearing capacity of the connecting device depends on the tensile capacity of the web plate, and the connecting bearing capacity of the other parts are not lower than the tensile bearing capacity of the web plate; the web plate is made of high-strength material with obvious yield steps so as to ensure that the web plate has obvious plastic deformation under the condition of keeping enough bearing capacity before fracture; the T-shaped groove member and the T-shaped structural member are generally made of steel, and are generally formed integrally or welded or bolted, which is not described herein again.

In this embodiment, the web 102 is vertically arranged in the longitudinal direction, and the wing plate 101 is horizontally arranged in the longitudinal direction, where the vertical and horizontal directions correspond to the direction of the bridge, and are not described herein again; the lower part of the T-shaped groove member 201 is provided with a longitudinal strip-shaped opening 2012 matched with the web plate 102; the length of the strip 2012 should be greater than the longitudinal dimension of the web and will not be described further herein.

In this embodiment, damping blocks 2013 are respectively arranged in the T-shaped groove 2011 corresponding to the longitudinal two ends of the wing plate 101, and a set distance is correspondingly arranged between each damping block 2013 and the longitudinal two ends of the wing plate 101; because the T-shaped groove member 201 and the T-shaped structural member are rigid, and because the web plate has higher rigidity in the longitudinal direction, when the bridge vibrates to generate longitudinal relative displacement, the damping block can generate effective damping, and the damping effect is achieved; the damping block is generally a rubber block, so that the service life is long and the damping effect is good; in the case of a transverse displacement, a certain elastic deformation can occur due to the forces originating in the transverse direction of the web, and a damping effect is likewise achieved.

In this embodiment, the T-shaped groove member 201 is an integral structure, as shown in fig. 3, the T-shaped groove member and the T-shaped structural member are installed in advance and sealed by welding, which is not described herein again.

Or, a detachable end cover 2014 is arranged at one longitudinal end of the T-shaped groove member 201, an end opening for guiding the wing plate 101 to be installed into the T-shaped groove 2011 is arranged corresponding to the end cover 2014, the strip-shaped port 2013 is communicated with the end opening, and after the installation is finished, the end cover is closed at the end opening through a bolt to form an integral T-shaped groove member; the installation and the dismantlement are convenient.

In this embodiment, a cover with a set length is detachably disposed on the strip-shaped opening 2014 corresponding to the open end of the T-shaped groove member 201, and the cover is used for closing the end of the strip-shaped opening with the set length in the longitudinal direction;

the cover is a T-shaped structure cover 2015, a web plate of the T-shaped structure cover 2015 is embedded into the strip-shaped opening, two flange covers two sides of the strip-shaped opening and are fixed through bolts, and as shown in FIG. 4, the bolts are vertically arranged;

alternatively, the cover is a rectangular cover 2015 ', and the rectangular cover 2015' is embedded into the strip 2014 and fixed by bolts passing through two sides of the strip and the rectangular cover, as shown in fig. 5.

In this embodiment, in use, the fixing plate 202 is anchored to the bottom of the corresponding main beam a by the upper anchor bolt 203; or, the fixing plate 202 pre-embeds the newly-built bridge to the bottom of the corresponding main beam a through an anchoring steel bar (not shown) fixedly arranged on the newly-built bridge; the web 102 is anchored to the end of the pier cap beam c by a lower anchor bolt 103.

Fig. 8 is a schematic block diagram of an alarm system, and in this embodiment, an automatic alarm system is further included, including:

the signal acquisition unit is used for acquiring tension signals of the upper structural part or/and the lower structural part in the vertical direction; the signal acquisition unit generally adopts a tension sensor (such as a strain gauge 3 attached to or implanted in the web 103) for acquiring the deformation of the web in the vertical direction generated when the girder overturns or has an overturning tendency, and outputting a signal to the central processing unit;

the central processing unit is used for receiving and processing the tension signal transmitted by the signal acquisition unit; the central processing unit at least comprises a Central Processing Unit (CPU), a memory and necessary peripheral circuits, realizes the receiving and processing of signals (the strain gauge directly transmits the strain signals to the central processing unit in a wired connection mode, if a wireless transmission mode is adopted, the strain gauge needs to be configured with a processor and wireless transmitting equipment, and the central processing unit needs to be configured with wireless receiving equipment, which is not described herein again), and outputs command signals to the output unit; the central processing unit is generally fixed on the main beam, and necessary waterproof and dustproof settings are adopted, which are not described herein again;

the output unit is used for receiving and outputting the command signal of the central processing unit, generally comprises on-site audible and visual alarm equipment, remote transmission equipment and the like, and generally adopts a wireless transmission or wired transmission mode to perform remote data transmission, for example, the data signal of the central processing unit is sent to a remote monitoring center (a management center of a bridge, which needs to be provided with wireless receiving equipment) by adopting the wireless transmission equipment and is stored for future reference, which is not described herein again; the operation principle of the wireless signal output device is not described in detail herein.

The invention also discloses a bridge, which comprises a pier and a main beam, wherein the anti-tilt shock-absorption composite limiting device b is arranged between the two ends of the capping beam corresponding to the pier and the bottom of the main beam respectively.

The construction process of the invention is as follows:

for the existing operation bridge, the upper structural part (T-shaped groove component) is fixedly installed at the bottom surface of the set main beam in a bolt implanting connection mode, the T-shaped structural part is embedded into the T-shaped groove of the T-shaped groove component, the slotted end bottom plate is sealed through bolt connection, and finally the web plate of the T-shaped connecting part is fixedly installed on the transverse bridge-direction end face of the pier capping beam in a connection mode of implanting an anchoring bolt.

The device is assembled to a newly-built cast-in-place concrete girder, a web plate of a T-shaped structural member is fixedly arranged on the transverse bridge-direction end face of a pier capping beam in a connecting mode of implanting lower anchoring bolts, beam bottom buckle grooves are fixedly pre-embedded at set positions in turn (anchoring plates are provided with anchoring reinforcing steel bars), the girder concrete is poured, and finally a construction support is detached.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.