CN110565548A - method for monitoring supporting and reinforcing construction of inclined leg rigid frame bridge - Google Patents
method for monitoring supporting and reinforcing construction of inclined leg rigid frame bridge Download PDFInfo
- Publication number
- CN110565548A CN110565548A CN201910987318.6A CN201910987318A CN110565548A CN 110565548 A CN110565548 A CN 110565548A CN 201910987318 A CN201910987318 A CN 201910987318A CN 110565548 A CN110565548 A CN 110565548A
- Authority
- CN
- China
- Prior art keywords
- supporting
- reinforcing
- support frame
- rigid frame
- inclined leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
Abstract
A method for monitoring supporting and reinforcing construction of an inclined leg rigid frame bridge comprises the following steps: (1) a supporting and reinforcing support frame is suspended between the inclined legs of the inclined leg rigid frame bridge; (2) a stress monitoring device is arranged on the supporting top reinforcing support frame, and the pressure change of the supporting top reinforcing support frame is monitored and judged in real time; (3) a plurality of supporting top reinforcing devices are uniformly arranged on the whole supporting top reinforcing support frame; (4) synchronously adopting a plurality of supporting and reinforcing devices to support and reinforce the inclined leg rigid frame bridge, and monitoring the readings of a supporting and supporting force distribution monitoring sensor and a supporting and supporting displacement monitoring sensor in real time; (5) when the stress and strain on the beam body and the supporting and supporting reinforced support frame of the inclined leg rigid frame bridge reach the standard, the supporting and supporting reinforcing devices are adjusted to enable the upper part and the lower part of the supporting and supporting reinforced support frame to be respectively and closely attached to the beam body and the supporting and supporting reinforced support frame. The invention greatly improves the integral rigidity of the inclined leg rigid frame bridge, ensures the safety of the bridge structure and improves the bearing capacity and the design bearing standard of the bridge.
Description
Technical Field
The invention belongs to the technical field of design and construction of highway bridge reinforcement, and particularly relates to a method for monitoring the supporting and reinforcing construction of an inclined leg rigid frame bridge.
Background
The inclined leg rigid frame bridge is a bridge type commonly used in China, and is abundant on expressways or trunk roads in China due to mature design, reliable structure, simple and convenient construction and attractive appearance. A slant leg rigid frame bridge generally includes a symmetrically disposed foundation and slant legs, and a deck is erected over the foundation and the slant legs. However, under the influence of long-term shrinkage and creep of concrete, the problem of mid-span downwarping of the rigid frame bridge becomes more prominent along with the increase of service life, and the safety and the service performance of the bridge are seriously threatened by the diseases such as prestress relaxation, web cracking aggravation and the like of the rigid frame bridge caused by the problem.
The existing bridge reinforcing technology is mainly divided into two types, one is to change a structural system, such as reducing the span of a beam, and a simply supported beam is changed into a continuous beam structure, so as to reduce the burden of the original beam; the other is to enlarge the section size and reinforce the structural reinforcing bar, etc. The existing reinforcement technology mostly adopts reinforcement measures of sticking carbon fibers, steel plates and the like on a tension area, and the reinforcement methods belong to the passive reinforcement category in principle. The dead weight and the dead load of the member are borne by the original beam, the live load is borne by the combined cross section after the reinforcement, the strength of the post-reinforcing material is limited by the deformation of the original beam, the stress of the post-reinforcing material can not reach the design value of the tensile strength under the limit state generally, great waste phenomenon exists, and the reinforcing effect of the reinforcing material is very limited when the reinforcing material only solves the problem of live load. In recent years, active reinforcement measures embodying advanced design concepts are gradually accepted, the distribution of internal force is changed by adopting an external prestressed cable or a method of reinforcing by using an adhesive prestressed steel beam for the active reinforcement of a bridge structure, the problem of stress lag of a rear reinforcement material is fundamentally solved, the mechanical property of the material is fully exerted, and the utilization efficiency of the material is improved.
The above-mentioned technique of actively reinforcing a bridge by prestressing has some problems as well. For reinforcing a bridge which cannot interrupt traffic, the under-bridge prestress construction process is complex, and an anchoring measure is arranged on a damaged bridge to further damage the bridge to be reinforced. Due to the complex loss condition of the prestressed steel beams, after the reinforcement is completed, the effective prestress effect is difficult to monitor and mostly obtained by theoretical analysis and calculation, certain deviation exists between the effective prestress effect and the actual condition, and the reinforced bridge stress state and the like are inconvenient for management and maintenance units to master. During the reinforcing construction, the measures of interrupting or limiting traffic or further increasing the prestress effect are mostly adopted, which brings great inconvenience to the engineering.
Disclosure of Invention
In order to solve the problems, the invention provides a method for monitoring the supporting and reinforcing construction of an inclined leg rigid frame bridge. The invention greatly improves the integral rigidity of the inclined leg rigid frame bridge, improves the stress condition of the reinforced bridge structure, ensures the safety of the bridge structure, improves the bearing capacity and the design bearing standard of the bridge, and greatly improves the reinforcing construction safety and the construction efficiency of the inclined leg rigid frame bridge.
the invention provides a method for monitoring the supporting and reinforcing construction of an inclined leg rigid frame bridge, which is used for solving the technical problems and comprises the following steps:
(1) a supporting and reinforcing support frame is suspended between the inclined legs of the inclined leg rigid frame bridge; the supporting and reinforcing support frame is positioned below a beam body of the inclined leg rigid frame bridge, the section of the supporting and reinforcing support frame along the longitudinal direction of the inclined leg rigid frame bridge is in a trapezoidal form, a bottom support frame and a top support frame of the supporting and reinforcing support frame are arranged between the bottom support frame and the top support frame, a plurality of mutually connected claw-shaped support structures are arranged between the bottom support frame and the top support frame, and each claw-shaped support structure comprises a vertical support and inclined supports on two sides;
(2) Stress monitoring devices are respectively arranged on each vertical support of the support top reinforcing support frame, and the pressure change of the support top reinforcing support frame is monitored and judged in real time through the reading of the stress monitoring devices in the support top reinforcing construction process, so that the construction safety in the support top reinforcing process is ensured;
(3) The supporting and supporting device comprises a base, an auxiliary hydraulic cylinder, a plurality of linkage rods, a supporting arm, a lower platform, an upper platform, a supporting force distribution monitoring sensor, a supporting and supporting displacement monitoring sensor, a first main hydraulic cylinder and a second main hydraulic cylinder;
(4) synchronously adopting a plurality of supporting and reinforcing devices to support and reinforce the inclined leg rigid frame bridge, so that the beam body of the inclined leg rigid frame bridge generates elastic deformation; the readings of the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor are monitored in real time, and the supporting force change of the supporting reinforcement device is judged and adjusted through the readings, so that the construction safety and the stress adjustment in the supporting reinforcement process are ensured;
(5) When the stress and strain on the beam body of the inclined leg rigid frame bridge and the supporting and supporting reinforcing support frame reach the standard, the supporting and reinforcing devices are adjusted to enable the upper part and the lower part of the supporting and reinforcing devices to be tightly attached to the beam body and the supporting and supporting reinforcing support frame respectively, the supporting and reinforcing devices are locked, and the supporting and supporting force can be transmitted to the beam body of the inclined leg rigid frame bridge through the supporting and reinforcing devices.
preferably, a base of the supporting and jacking reinforcing device is provided with a first main hydraulic cylinder, a second main hydraulic cylinder, an auxiliary hydraulic cylinder and a stable supporting and jacking mechanism, the first main hydraulic cylinder, the second main hydraulic cylinder and the auxiliary hydraulic cylinder are respectively used for supporting the upper platform and the lower platform and providing power for the stable supporting and jacking mechanism, and the upper platform is connected with the lower platform through a flexible pivoting structure.
In any of the above schemes, preferably, the stable supporting mechanism is composed of two connected rhombus linkage assemblies, each rhombus linkage assembly is composed of a base, a plurality of linkage rods, a supporting arm and a lower platform, and the supporting displacement monitoring sensor locally adjusts the spatial positions of the upper platform and the lower platform according to the tiny displacement change of the flexible pivoting structure.
In any of the above schemes, preferably, the upper platform is in contact with the lower surface of the beam body of the slant leg rigid frame bridge through a first base plate, and the base is in contact with the upper surface of the supporting and reinforcing support frame through a second base plate.
in any of the above schemes, preferably, the supporting force distribution monitoring sensors are evenly distributed on the surfaces of the upper platform and the supporting arm, and measure the force distribution of each point on the surface in real time, so as to ensure that the force change of each point is monitored in real time, and thus, the sudden situation occurring in the supporting reinforcement process can be responded in time; the supporting top displacement monitoring sensor measures the relative displacement change of the upper platform and the lower platform, and the position of the supporting top reinforcing device is adjusted in real time according to the displacement change.
in any of the above schemes, preferably, the stress monitoring device, the jacking force distribution monitoring sensor and the jacking displacement monitoring sensor are all connected to the computer terminal through lines.
In any scheme, preferably, when the plurality of supporting and reinforcing devices are synchronously adopted to support and reinforce the inclined leg rigid frame bridge, the readings of the stress monitoring device, the supporting and force distribution monitoring sensor and the supporting and displacement monitoring sensor are monitored and recorded at intervals of 6h, and when the change of the readings monitored for 12h continuously corresponding to each reading is not more than 0.5%, the plurality of supporting and reinforcing devices can be locked; observing the reading changes of the stress monitoring device, the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor once again after the supporting reinforcement devices are locked each time, and drawing a supporting stress change relation curve; and comparing and analyzing the beam elastic deformation and the non-elastic deformation of the inclined leg rigid frame bridge through the change relation curve, and ensuring the construction effect of supporting and reinforcing.
The invention is obtained according to years of practical application practice and experience, adopts the best technical means and measures to carry out combined optimization, obtains the optimal technical effect, is not simple superposition and splicing of technical characteristics, and has obvious significance.
The invention has the beneficial effects that:
1. the invention utilizes the inclined leg structure of the inclined leg rigid frame bridge to arrange the supporting and reinforcing support frame structure, forms the lower supporting structure with very stable stress and very large bearing capacity, improves the stress condition of the reinforced bridge structure, ensures the safety of the bridge structure, improves the bearing capacity and the design bearing standard of the bridge, and greatly improves the reinforcing construction safety and the construction efficiency of the inclined leg rigid frame bridge. And the supporting and reinforcing support frame structure is arranged in a suspended mode by utilizing the inclined leg structure, so that the space under the bridge is not occupied.
2. The method has high efficiency and good reinforcement performance, can greatly improve the rigidity of the rigid frame bridge and improve the problem of mid-span downwarping. The method enriches bridge line types, and the reinforced bridge has smooth and simple appearance, high landscape value and good engineering popularization value.
3. The supporting and jacking reinforcement structure is very simple in design, can ensure that the structure is always in a horizontal state, and can monitor the change of force and displacement at each point in real time, so that the supporting and jacking reinforcement structure is very suitable for the inclined leg rigid frame bridge.
4. the monitoring method can remind workers of paying attention to protection in real time, and improves the safety of supporting and reinforcing construction.
5. The invention has the functions of large adjustment displacement, repeated supporting and force measurement at any time, can detect and recheck the supporting force at regular intervals, and well solves the problem of supporting force loss caused by material deformation. In the reinforcement construction of the inclined leg rigid frame bridge, the design concept of active reinforcement is realized, the normal use of the bridge is not influenced, the existing traffic is not influenced, the original bridge structure is not damaged, the material consumption is saved, and the construction requirements of environmental protection and low carbon are met.
brief description of the drawings
Fig. 1 is a schematic flow chart of a method for monitoring supporting and reinforcing construction of an inclined leg rigid frame bridge roof according to the invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples, but the scope of the claims is not limited thereto.
Example 1
Referring to fig. 1, a method for monitoring supporting and reinforcing construction of an inclined leg rigid frame bridge comprises the following steps:
(1) A supporting and reinforcing support frame is suspended between the inclined legs of the inclined leg rigid frame bridge; the supporting and reinforcing support frame is positioned below a beam body of the inclined leg rigid frame bridge, the section of the supporting and reinforcing support frame along the longitudinal direction of the inclined leg rigid frame bridge is in a trapezoidal form, a bottom support frame and a top support frame of the supporting and reinforcing support frame are arranged between the bottom support frame and the top support frame, a plurality of mutually connected claw-shaped support structures are arranged between the bottom support frame and the top support frame, and each claw-shaped support structure comprises a vertical support and inclined supports on two sides;
(2) Stress monitoring devices are respectively arranged on each vertical support of the support top reinforcing support frame, and the pressure change of the support top reinforcing support frame is monitored and judged in real time through the reading of the stress monitoring devices in the support top reinforcing construction process, so that the construction safety in the support top reinforcing process is ensured;
(3) the supporting and supporting device comprises a base, an auxiliary hydraulic cylinder, a plurality of linkage rods, a supporting arm, a lower platform, an upper platform, a supporting force distribution monitoring sensor, a supporting and supporting displacement monitoring sensor, a first main hydraulic cylinder and a second main hydraulic cylinder;
(4) Synchronously adopting a plurality of supporting and reinforcing devices to support and reinforce the inclined leg rigid frame bridge, so that the beam body of the inclined leg rigid frame bridge generates elastic deformation; the readings of the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor are monitored in real time, and the supporting force change of the supporting reinforcement device is judged and adjusted through the readings, so that the construction safety and the stress adjustment in the supporting reinforcement process are ensured;
(5) When the stress and strain on the beam body of the inclined leg rigid frame bridge and the supporting and supporting reinforcing support frame reach the standard, the supporting and reinforcing devices are adjusted to enable the upper part and the lower part of the supporting and reinforcing devices to be tightly attached to the beam body and the supporting and supporting reinforcing support frame respectively, the supporting and reinforcing devices are locked, and the supporting and supporting force can be transmitted to the beam body of the inclined leg rigid frame bridge through the supporting and reinforcing devices.
Install first master cylinder, second master cylinder, vice pneumatic cylinder and stable top mechanism of propping on supporting reinforcing apparatus's the base, first master cylinder, second master cylinder and vice pneumatic cylinder are used for supporting upper mounting plate and lower platform respectively to for stable top mechanism of propping and providing power, through flexible pivot structural connection between upper mounting plate and the lower platform.
The stable supporting and jacking mechanism consists of two connected rhombic linkage assemblies, each rhombic linkage assembly consists of a base, a plurality of linkage rod pieces, a supporting arm and a lower platform, and the supporting and jacking displacement monitoring sensor locally adjusts the spatial positions of the upper platform and the lower platform according to the small displacement change of the flexible pivoting structure.
The upper platform is in contact with the lower surface of a beam body of the inclined leg rigid frame bridge through a first base plate, and the base is in contact with the upper surface of the supporting and reinforcing support frame through a second base plate.
the supporting force distribution monitoring sensors are evenly distributed on the surfaces of the upper platform and the supporting arms, the force distribution of each point on the surface is measured in real time, and the force change of each point is monitored in real time, so that the sudden situation occurring in the supporting and reinforcing process can be responded in time; the supporting top displacement monitoring sensor measures the relative displacement change of the upper platform and the lower platform, and the position of the supporting top reinforcing device is adjusted in real time according to the displacement change.
The stress monitoring device, the supporting force distribution monitoring inductor and the supporting displacement monitoring inductor are all connected to the computer terminal through circuits.
When a plurality of supporting and reinforcing devices are synchronously adopted to support and reinforce the inclined leg rigid frame bridge, readings of the stress monitoring device, the supporting and supporting force distribution monitoring sensor and the supporting and supporting displacement monitoring sensor are monitored and recorded at intervals of 6h, and when the change of each reading monitored for 12h continuously is not more than 0.5%, the supporting and reinforcing devices can be locked; observing the reading changes of the stress monitoring device, the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor once again after the supporting reinforcement devices are locked each time, and drawing a supporting stress change relation curve; and comparing and analyzing the beam elastic deformation and the non-elastic deformation of the inclined leg rigid frame bridge through the change relation curve, and ensuring the construction effect of supporting and reinforcing.
Example 2
Referring to fig. 1, a method for monitoring supporting and reinforcing construction of an inclined leg rigid frame bridge comprises the following steps:
(1) A supporting and reinforcing support frame is suspended between the inclined legs of the inclined leg rigid frame bridge; the supporting and reinforcing support frame is positioned below a beam body of the inclined leg rigid frame bridge, the section of the supporting and reinforcing support frame along the longitudinal direction of the inclined leg rigid frame bridge is in a trapezoidal form, a bottom support frame and a top support frame of the supporting and reinforcing support frame are arranged between the bottom support frame and the top support frame, a plurality of mutually connected claw-shaped support structures are arranged between the bottom support frame and the top support frame, and each claw-shaped support structure comprises a vertical support and inclined supports on two sides;
(2) Stress monitoring devices are respectively arranged on each vertical support of the support top reinforcing support frame, and the pressure change of the support top reinforcing support frame is monitored and judged in real time through the reading of the stress monitoring devices in the support top reinforcing construction process, so that the construction safety in the support top reinforcing process is ensured;
(3) The supporting and supporting device comprises a base, an auxiliary hydraulic cylinder, a plurality of linkage rods, a supporting arm, a lower platform, an upper platform, a supporting force distribution monitoring sensor, a supporting and supporting displacement monitoring sensor, a first main hydraulic cylinder and a second main hydraulic cylinder;
(4) Synchronously adopting a plurality of supporting and reinforcing devices to support and reinforce the inclined leg rigid frame bridge, so that the beam body of the inclined leg rigid frame bridge generates elastic deformation; the readings of the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor are monitored in real time, and the supporting force change of the supporting reinforcement device is judged and adjusted through the readings, so that the construction safety and the stress adjustment in the supporting reinforcement process are ensured;
(5) When the stress and strain on the beam body of the inclined leg rigid frame bridge and the supporting and supporting reinforcing support frame reach the standard, the supporting and reinforcing devices are adjusted to enable the upper part and the lower part of the supporting and reinforcing devices to be tightly attached to the beam body and the supporting and supporting reinforcing support frame respectively, the supporting and reinforcing devices are locked, and the supporting and supporting force can be transmitted to the beam body of the inclined leg rigid frame bridge through the supporting and reinforcing devices.
Install first master cylinder, second master cylinder, vice pneumatic cylinder and stable top mechanism of propping on supporting reinforcing apparatus's the base, first master cylinder, second master cylinder and vice pneumatic cylinder are used for supporting upper mounting plate and lower platform respectively to for stable top mechanism of propping and providing power, through flexible pivot structural connection between upper mounting plate and the lower platform.
The stable supporting and jacking mechanism consists of two connected rhombic linkage assemblies, each rhombic linkage assembly consists of a base, a plurality of linkage rod pieces, a supporting arm and a lower platform, and the supporting and jacking displacement monitoring sensor locally adjusts the spatial positions of the upper platform and the lower platform according to the small displacement change of the flexible pivoting structure.
The upper platform is in contact with the lower surface of a beam body of the inclined leg rigid frame bridge through a first base plate, and the base is in contact with the upper surface of the supporting and reinforcing support frame through a second base plate.
the supporting force distribution monitoring sensors are evenly distributed on the surfaces of the upper platform and the supporting arms, the force distribution of each point on the surface is measured in real time, and the force change of each point is monitored in real time, so that the sudden situation occurring in the supporting and reinforcing process can be responded in time; the supporting top displacement monitoring sensor measures the relative displacement change of the upper platform and the lower platform, and the position of the supporting top reinforcing device is adjusted in real time according to the displacement change.
The stress monitoring device, the supporting force distribution monitoring inductor and the supporting displacement monitoring inductor are all connected to the computer terminal through circuits.
When a plurality of supporting and reinforcing devices are synchronously adopted to support and reinforce the inclined leg rigid frame bridge, readings of the stress monitoring device, the supporting and supporting force distribution monitoring sensor and the supporting and supporting displacement monitoring sensor are monitored and recorded at intervals of 6h, and when the change of each reading monitored for 12h continuously is not more than 0.5%, the supporting and reinforcing devices can be locked; observing the reading changes of the stress monitoring device, the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor once again after the supporting reinforcement devices are locked each time, and drawing a supporting stress change relation curve; and comparing and analyzing the beam elastic deformation and the non-elastic deformation of the inclined leg rigid frame bridge through the change relation curve, and ensuring the construction effect of supporting and reinforcing.
Furthermore, in order to guarantee the construction effect, the jacking force distribution monitoring sensor comprises an oil liquid pipe, a vent pipe, a grating temperature sensor, a grating stress sensor, a stress limiter, an optical fiber penetrating groove, a liquid level indicator, a balancing weight and an oil liquid storage box, wherein the balancing weight is connected to one end of the grating stress sensor through a lifting hook and is hung in the oil liquid storage box, and the optical fiber penetrating groove is connected to an external optical splitter through an optical fiber. The top of the supporting force distribution monitoring sensor is provided with a groove, and a sealing top cover in threaded fit is further arranged inside the groove in the top of the supporting force distribution monitoring sensor.
By adopting the supporting force distribution monitoring sensor, an optical fiber sensing real-time automatic monitoring technology is introduced, supporting reinforcement monitoring work is carried out, manual operation is reduced, and working efficiency is improved. After the equipment is installed, the stress data is automatically collected by the system in the whole process. And monitoring errors can be effectively reduced, and the deformation stable state in the supporting and jacking reinforcing process can be automatically judged, so that the acquired data is more practical.
Example 3
Referring to fig. 1, a method for monitoring supporting and reinforcing construction of an inclined leg rigid frame bridge comprises the following steps:
(1) A supporting and reinforcing support frame is suspended between the inclined legs of the inclined leg rigid frame bridge; the supporting and reinforcing support frame is positioned below a beam body of the inclined leg rigid frame bridge, the section of the supporting and reinforcing support frame along the longitudinal direction of the inclined leg rigid frame bridge is in a trapezoidal form, a bottom support frame and a top support frame of the supporting and reinforcing support frame are arranged between the bottom support frame and the top support frame, a plurality of mutually connected claw-shaped support structures are arranged between the bottom support frame and the top support frame, and each claw-shaped support structure comprises a vertical support and inclined supports on two sides;
(2) stress monitoring devices are respectively arranged on each vertical support of the support top reinforcing support frame, and the pressure change of the support top reinforcing support frame is monitored and judged in real time through the reading of the stress monitoring devices in the support top reinforcing construction process, so that the construction safety in the support top reinforcing process is ensured;
(3) The supporting and supporting device comprises a base, an auxiliary hydraulic cylinder, a plurality of linkage rods, a supporting arm, a lower platform, an upper platform, a supporting force distribution monitoring sensor, a supporting and supporting displacement monitoring sensor, a first main hydraulic cylinder and a second main hydraulic cylinder;
(4) Synchronously adopting a plurality of supporting and reinforcing devices to support and reinforce the inclined leg rigid frame bridge, so that the beam body of the inclined leg rigid frame bridge generates elastic deformation; the readings of the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor are monitored in real time, and the supporting force change of the supporting reinforcement device is judged and adjusted through the readings, so that the construction safety and the stress adjustment in the supporting reinforcement process are ensured;
(5) When the stress and strain on the beam body of the inclined leg rigid frame bridge and the supporting and supporting reinforcing support frame reach the standard, the supporting and reinforcing devices are adjusted to enable the upper part and the lower part of the supporting and reinforcing devices to be tightly attached to the beam body and the supporting and supporting reinforcing support frame respectively, the supporting and reinforcing devices are locked, and the supporting and supporting force can be transmitted to the beam body of the inclined leg rigid frame bridge through the supporting and reinforcing devices.
Install first master cylinder, second master cylinder, vice pneumatic cylinder and stable top mechanism of propping on supporting reinforcing apparatus's the base, first master cylinder, second master cylinder and vice pneumatic cylinder are used for supporting upper mounting plate and lower platform respectively to for stable top mechanism of propping and providing power, through flexible pivot structural connection between upper mounting plate and the lower platform.
The stable supporting and jacking mechanism consists of two connected rhombic linkage assemblies, each rhombic linkage assembly consists of a base, a plurality of linkage rod pieces, a supporting arm and a lower platform, and the supporting and jacking displacement monitoring sensor locally adjusts the spatial positions of the upper platform and the lower platform according to the small displacement change of the flexible pivoting structure.
The upper platform is in contact with the lower surface of a beam body of the inclined leg rigid frame bridge through a first base plate, and the base is in contact with the upper surface of the supporting and reinforcing support frame through a second base plate.
The supporting force distribution monitoring sensors are evenly distributed on the surfaces of the upper platform and the supporting arms, the force distribution of each point on the surface is measured in real time, and the force change of each point is monitored in real time, so that the sudden situation occurring in the supporting and reinforcing process can be responded in time; the supporting top displacement monitoring sensor measures the relative displacement change of the upper platform and the lower platform, and the position of the supporting top reinforcing device is adjusted in real time according to the displacement change.
the stress monitoring device, the supporting force distribution monitoring inductor and the supporting displacement monitoring inductor are all connected to the computer terminal through circuits.
When a plurality of supporting and reinforcing devices are synchronously adopted to support and reinforce the inclined leg rigid frame bridge, readings of the stress monitoring device, the supporting and supporting force distribution monitoring sensor and the supporting and supporting displacement monitoring sensor are monitored and recorded at intervals of 6h, and when the change of each reading monitored for 12h continuously is not more than 0.5%, the supporting and reinforcing devices can be locked; observing the reading changes of the stress monitoring device, the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor once again after the supporting reinforcement devices are locked each time, and drawing a supporting stress change relation curve; and comparing and analyzing the beam elastic deformation and the non-elastic deformation of the inclined leg rigid frame bridge through the change relation curve, and ensuring the construction effect of supporting and reinforcing.
Further, in order to guarantee the construction effect, it is right before the installation of a supporting top reinforcing device the mounted position of the supporting top reinforcing device is measured and paid off the top supporting frame is provided with a fixed connecting device, and the base of the supporting top reinforcing device is fixed on the fixed connecting device through a second base plate, so that the flatness is ensured, and the height difference is not more than 2 mm.
before the supporting frame is hoisted and reinforced by the supporting top, the effectiveness and the integrity of the stress monitoring device are checked, and then the stress monitoring device is effectively protected and treated. Before the supporting and reinforcing support frame is hoisted, the supporting and reinforcing support frame must be subjected to initial reading, the stress monitoring device can be subjected to real-time reading in the construction process, and the continuity of a test reference during a discontinuous test period is ensured.
The method provided by the invention increases the service life of the inclined leg rigid frame bridge and ensures the safety of the bridge. The professional is responsible for ensuring the normal operation of the synchronous supporting and reinforcing device by controlling the supporting and reinforcing device, and the effectiveness of reinforcement is ensured.
By analyzing the stress condition of each structure and carrying out finite element analysis on the main stress structure or structure nodes of the structure, the discontinuous stress monitoring can be carried out on each component and structure through software, the hidden danger occurrence rate of stress deformation in the construction process can be greatly reduced, and the construction efficiency is greatly improved. The invention has simple operation and can effectively enlarge the scale of structural deformation, so that the scale is more vivid, and the invention is beneficial to the observation of constructors and realizes the early warning function.
In addition, in order to achieve better technical effects, the technical solutions in the above embodiments may be combined arbitrarily to meet various requirements of practical applications.
according to the embodiment, the support reinforced support frame structure is arranged by utilizing the inclined leg structure of the inclined leg rigid frame bridge, so that the lower support structure with very stable stress and very large bearing capacity is formed, the stress condition of the reinforced bridge structure is improved, the safety of the bridge structure is ensured, the bearing capacity and the design bearing standard of the bridge are improved, and the reinforcing construction safety and the construction efficiency of the inclined leg rigid frame bridge are greatly improved. And the supporting and reinforcing support frame structure is arranged in a suspended mode by utilizing the inclined leg structure, so that the space under the bridge is not occupied.
The method has high efficiency and good reinforcement performance, can greatly improve the rigidity of the rigid frame bridge and improve the problem of mid-span downwarping. The method enriches bridge line types, and the reinforced bridge has smooth and simple appearance, high landscape value and good engineering popularization value.
the supporting and jacking reinforcement structure is very simple in design, can ensure that the structure is always in a horizontal state, and can monitor the change of force and displacement at each point in real time, so that the supporting and jacking reinforcement structure is very suitable for the inclined leg rigid frame bridge.
The monitoring method can remind workers of paying attention to protection in real time, and improves the safety of supporting and reinforcing construction.
The invention has the functions of large adjustment displacement, repeated supporting and force measurement at any time, can detect and recheck the supporting force at regular intervals, and well solves the problem of supporting force loss caused by material deformation. In the reinforcement construction of the inclined leg rigid frame bridge, the design concept of active reinforcement is realized, the normal use of the bridge is not influenced, the existing traffic is not influenced, the original bridge structure is not damaged, the material consumption is saved, and the construction requirements of environmental protection and low carbon are met.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (7)
1. A method for monitoring supporting and reinforcing construction of an inclined leg rigid frame bridge is characterized by comprising the following steps:
(1) a supporting and reinforcing support frame is suspended between the inclined legs of the inclined leg rigid frame bridge; the supporting and reinforcing support frame is positioned below a beam body of the inclined leg rigid frame bridge, the section of the supporting and reinforcing support frame along the longitudinal direction of the inclined leg rigid frame bridge is in a trapezoidal form, a bottom support frame and a top support frame of the supporting and reinforcing support frame are arranged between the bottom support frame and the top support frame, a plurality of mutually connected claw-shaped support structures are arranged between the bottom support frame and the top support frame, and each claw-shaped support structure comprises a vertical support and inclined supports on two sides;
(2) Stress monitoring devices are respectively arranged on each vertical support of the support top reinforcing support frame, and the pressure change of the support top reinforcing support frame is monitored and judged in real time through the reading of the stress monitoring devices in the support top reinforcing construction process, so that the construction safety in the support top reinforcing process is ensured;
(3) the supporting and supporting device comprises a base, an auxiliary hydraulic cylinder, a plurality of linkage rods, a supporting arm, a lower platform, an upper platform, a supporting force distribution monitoring sensor, a supporting and supporting displacement monitoring sensor, a first main hydraulic cylinder and a second main hydraulic cylinder;
(4) synchronously adopting a plurality of supporting and reinforcing devices to support and reinforce the inclined leg rigid frame bridge, so that the beam body of the inclined leg rigid frame bridge generates elastic deformation; the readings of the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor are monitored in real time, and the supporting force change of the supporting reinforcement device is judged and adjusted through the readings, so that the construction safety and the stress adjustment in the supporting reinforcement process are ensured;
(5) When the stress and strain on the beam body of the inclined leg rigid frame bridge and the supporting and supporting reinforcing support frame reach the standard, the supporting and reinforcing devices are adjusted to enable the upper part and the lower part of the supporting and reinforcing devices to be tightly attached to the beam body and the supporting and supporting reinforcing support frame respectively, the supporting and reinforcing devices are locked, and the supporting and supporting force can be transmitted to the beam body of the inclined leg rigid frame bridge through the supporting and reinforcing devices.
2. the method for monitoring the supporting and reinforcing construction of the inclined leg rigid frame bridge according to claim 1, wherein a first main hydraulic cylinder, a second main hydraulic cylinder, an auxiliary hydraulic cylinder and a stable supporting and supporting mechanism are mounted on a base of the supporting and reinforcing device, the first main hydraulic cylinder, the second main hydraulic cylinder and the auxiliary hydraulic cylinder are respectively used for supporting an upper platform and a lower platform and providing power for the stable supporting and supporting mechanism, and the upper platform is connected with the lower platform through a flexible pivoting structure.
3. The method for monitoring the supporting and reinforcing construction of the inclined leg rigid frame bridge according to the claims 1-2, wherein the stable supporting and supporting mechanism is composed of two connected rhombic linkage assemblies, each rhombic linkage assembly is composed of a base, a plurality of linkage rod pieces, a supporting arm and a lower platform, and a supporting and supporting displacement monitoring sensor is used for locally adjusting the spatial positions of the upper platform and the lower platform according to the tiny displacement change of the flexible pivoting structure.
4. The method for monitoring the supporting and reinforcing construction of the inclined leg rigid frame bridge according to claim 3, wherein the upper platform is in contact with the lower surface of a beam body of the inclined leg rigid frame bridge through a first base plate, and the base is in contact with the upper surface of the supporting and reinforcing support frame through a second base plate.
5. The method for monitoring the supporting and reinforcing construction of the inclined leg rigid frame bridge roof according to the claims 1 to 4, wherein the supporting and supporting force distribution monitoring sensors are evenly distributed on the surfaces of the upper platform and the supporting arms, the force distribution of each point on the surface is measured in real time, and the force change of each point is monitored in real time, so that the sudden situation occurring in the supporting and reinforcing process can be responded in time; the supporting top displacement monitoring sensor measures the relative displacement change of the upper platform and the lower platform, and the position of the supporting top reinforcing device is adjusted in real time according to the displacement change.
6. the method for monitoring the supporting and reinforcing construction of the inclined leg rigid frame bridge roof according to claim 5, wherein the stress monitoring device, the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor are all connected to a computer terminal through lines.
7. the method for monitoring the supporting and reinforcing construction of the inclined leg rigid frame bridge according to claims 1 to 6, wherein when a plurality of supporting and reinforcing devices are synchronously adopted to support and reinforce the inclined leg rigid frame bridge, the readings of the stress monitoring device, the supporting and force distribution monitoring sensor and the supporting and displacement monitoring sensor are monitored and recorded at intervals of 6h, and when the change of each reading monitored for 12h continuously is not more than 0.5%, the supporting and reinforcing devices can be locked; observing the reading changes of the stress monitoring device, the supporting force distribution monitoring sensor and the supporting displacement monitoring sensor once again after the supporting reinforcement devices are locked each time, and drawing a supporting stress change relation curve; and comparing and analyzing the beam elastic deformation and the non-elastic deformation of the inclined leg rigid frame bridge through the change relation curve, and ensuring the construction effect of supporting and reinforcing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910987318.6A CN110565548B (en) | 2019-10-17 | 2019-10-17 | Method for monitoring supporting and reinforcing construction of inclined leg rigid frame bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910987318.6A CN110565548B (en) | 2019-10-17 | 2019-10-17 | Method for monitoring supporting and reinforcing construction of inclined leg rigid frame bridge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110565548A true CN110565548A (en) | 2019-12-13 |
| CN110565548B CN110565548B (en) | 2020-06-26 |
Family
ID=68785572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910987318.6A Active CN110565548B (en) | 2019-10-17 | 2019-10-17 | Method for monitoring supporting and reinforcing construction of inclined leg rigid frame bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110565548B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120015197A (en) * | 2010-08-11 | 2012-02-21 | 정진호 | Equipmen and a method of reinforcement for a bridge by automatic tension_equipmen |
| CN103758359A (en) * | 2014-01-17 | 2014-04-30 | 西安建筑科技大学 | Safe and reliable construction system for replacing columns by sustaining beams supported by columns and construction method for replacing columns by sustaining beams supported by columns |
| CN103835732A (en) * | 2012-11-21 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Supporting force automatically adjusting type hydraulic supporting monitoring system for tunnel roof |
| CN105203158A (en) * | 2015-10-01 | 2015-12-30 | 广东省工程勘察院 | Automatic horizontal displacement and sedimentation monitoring system based on GPRS |
| CN106284079A (en) * | 2016-08-08 | 2017-01-04 | 中交三公局桥梁隧道工程有限公司 | A kind of bridge break post replace classification synchronize integral jacking construction method |
| CN108444435A (en) * | 2018-06-29 | 2018-08-24 | 宁波杉工智能安全科技股份有限公司 | A kind of bridge strain monitoring sensing device and its monitoring method |
| CN208430539U (en) * | 2018-05-07 | 2019-01-25 | 郑健 | A kind of foundation pit deformation monitoring device |
| CN110055899A (en) * | 2019-04-28 | 2019-07-26 | 钱开捷 | A kind of bridge construction support equipment in science of bridge building field |
| CN209368911U (en) * | 2019-01-03 | 2019-09-10 | 山东交通职业学院 | A kind of flat holder device of bridge static loading test survey |
-
2019
- 2019-10-17 CN CN201910987318.6A patent/CN110565548B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120015197A (en) * | 2010-08-11 | 2012-02-21 | 정진호 | Equipmen and a method of reinforcement for a bridge by automatic tension_equipmen |
| CN103835732A (en) * | 2012-11-21 | 2014-06-04 | 西安众智惠泽光电科技有限公司 | Supporting force automatically adjusting type hydraulic supporting monitoring system for tunnel roof |
| CN103758359A (en) * | 2014-01-17 | 2014-04-30 | 西安建筑科技大学 | Safe and reliable construction system for replacing columns by sustaining beams supported by columns and construction method for replacing columns by sustaining beams supported by columns |
| CN105203158A (en) * | 2015-10-01 | 2015-12-30 | 广东省工程勘察院 | Automatic horizontal displacement and sedimentation monitoring system based on GPRS |
| CN106284079A (en) * | 2016-08-08 | 2017-01-04 | 中交三公局桥梁隧道工程有限公司 | A kind of bridge break post replace classification synchronize integral jacking construction method |
| CN208430539U (en) * | 2018-05-07 | 2019-01-25 | 郑健 | A kind of foundation pit deformation monitoring device |
| CN108444435A (en) * | 2018-06-29 | 2018-08-24 | 宁波杉工智能安全科技股份有限公司 | A kind of bridge strain monitoring sensing device and its monitoring method |
| CN209368911U (en) * | 2019-01-03 | 2019-09-10 | 山东交通职业学院 | A kind of flat holder device of bridge static loading test survey |
| CN110055899A (en) * | 2019-04-28 | 2019-07-26 | 钱开捷 | A kind of bridge construction support equipment in science of bridge building field |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110565548B (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102051858B (en) | Jack loading triangular truss hanging basket and load test construction method thereof | |
| CN100545365C (en) | Building truss integral lifting method and equipment thereof | |
| CN103321416B (en) | Construction method for prestress of cable-stayed grid structure | |
| CN204849607U (en) | A continuous beam string basket pre -compaction device for bridge construction | |
| CN209584873U (en) | The double interim rope self-balancing push mode suspension bridge sling replacing underpinning devices of straddle-type | |
| CN107060105B (en) | A kind of lifting construction method of multiple steel vestibules between high building | |
| CN102530732A (en) | Hydraulic hoisting, slipping and emplacing method and equipment for large scale press components | |
| CN102286942A (en) | Device for replacing suspenders of tied arch bridge | |
| CN105887703A (en) | Replacing device for concrete tied arch bridge flexible suspension rod and using method thereof | |
| CN106383014A (en) | System and method for automatically monitoring deformation of bridge bearer | |
| CN104964840A (en) | Secondary lining arch foot sedimentation experiment loading device and application method | |
| CN205223871U (en) | Suspension bridge bridge tower overarm brace pre -compaction device | |
| CN110104568B (en) | Tower crane installation self-checking evaluation method | |
| CN110565548B (en) | Method for monitoring supporting and reinforcing construction of inclined leg rigid frame bridge | |
| CN201223881Y (en) | Apparatus for measuring tensioning force of fine rolling screw-thread steel | |
| CN105155418A (en) | Construction method for bridge horizontal movement | |
| CN204940135U (en) | Suspension Hanging Basket prepressing device | |
| CN102877657B (en) | Large-span H-shaped plane composite structure beam string upper-air cable replacement construction method | |
| CN208938508U (en) | A kind of scale (model) test device of monitoring continuous rigid frame bridge temperature and mobile load deformation | |
| CN209066443U (en) | A kind of deep basal pit fashioned iron support system based on active control | |
| CN206223383U (en) | A kind of auto monitoring and measurement system of bridge pad deformation | |
| CN214832738U (en) | Deep foundation pit monitoring device | |
| CN209584872U (en) | The double interim rope self-balancings of pin ear formula pull formula suspension bridge sling replacing underpinning device | |
| CN207932927U (en) | The not contour bearing steel truss structure of large span lifts synchronization-sliding TT＆C system | |
| CN113447067A (en) | Monitoring method of construction monitoring system of reinforced concrete combined section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |