CN114232518A - Method for large-altitude-difference reverse slope adjustment of urban bridge - Google Patents
Method for large-altitude-difference reverse slope adjustment of urban bridge Download PDFInfo
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- CN114232518A CN114232518A CN202111621929.2A CN202111621929A CN114232518A CN 114232518 A CN114232518 A CN 114232518A CN 202111621929 A CN202111621929 A CN 202111621929A CN 114232518 A CN114232518 A CN 114232518A
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- jacking
- downhill
- bridge
- urban bridge
- downhill section
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
Abstract
The invention discloses a method for large-altitude-difference reverse slope adjustment of an urban bridge, which utilizes the transformation of the existing bridge landing section to realize the direct connection with a newly-built bridge, shortens the engineering construction period, reduces the construction cost, improves the safety and civilization standard of a construction site and reduces the influence on urban traffic. On the other hand, the bridge jacking in the jacking construction process is monitored through a monitoring system (a plurality of displacement sensors), and synchronous, same-angle and same-speed jacking is guaranteed. The invention solves the problems that the original urban bridge is generally dismantled and rebuilt when the original urban bridge is in direct connection with a newly-built elevated frame, the construction cost is high and the construction period is long.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for large-altitude-difference reverse slope adjustment of an urban bridge.
Background
Along with the continuous development of urban construction, more and more municipal viaducts are constructed, most of newly-built viaducts relate to the problem of direct connection with the original urban bridges, the traditional construction mostly adopts a method of rebuilding at an original site after being dismantled, the method is equivalent to newly building one bridge, and the construction period is long, the construction cost is high, and the influence on traffic is large.
Disclosure of Invention
In order to overcome the defects in the prior art, a method for reverse slope adjustment of a large height difference of an urban bridge is provided so as to solve the problems that the original urban bridge is generally dismantled and rebuilt when the original urban bridge is in direct connection with a newly-built elevated frame, the construction cost is high and the construction period is long.
In order to realize the purpose, the method for large-altitude-difference reverse slope adjustment of the urban bridge comprises the following steps:
respectively arranging steel supports on a plurality of pier stud bearing platforms at the bottom of a downhill section of an original urban bridge, wherein the pier stud bearing platforms are arranged at intervals along the length direction of the downhill section, and the steel supports are arranged at intervals with the bottom of the downhill section;
installing jacking jacks on the steel supports on the pier column bearing platforms, and connecting the jacking jacks on the pier column bearing platforms with a controller;
installing a plurality of displacement sensors connected to the controller at the bottom of the downhill section, wherein the positions of the plurality of displacement sensors correspond to the positions of the jacking jacks on the pier stud bearing platforms one by one;
the controller controls the jacking jacks on the pier stud bearing platforms to synchronously jack the downhill sections, and the upper ends of the downhill sections are used as pivots to upwards overturn and lift the lower ends of the downhill sections, so that the downhill sections and the newly-built urban bridge are arranged in the same direction;
and after the posture of the downhill section is adjusted, replacing the old pier stud on the pier stud bearing platform to support the downhill section with the adjusted posture.
Furthermore, a plurality of jacking jacks on the pier stud bearing platform jack the downhill sections in equal proportion by adopting consistent angular speed.
Further, after the jacking jack jacks the downhill section, an old support on an old pier stud on the pier stud bearing platform is detached, and a following jack is installed in situ to support the downhill section and connected to the controller.
Further, the steel support is a steel pipe support.
Further, the steel support is a steel box cushion block.
The method for adjusting the slope of the urban bridge in the large altitude difference reverse direction has the advantages that the existing bridge landing section is modified, the direct connection with the newly-built bridge is realized, the engineering construction period is shortened, the construction cost is reduced, the safety civilization standard of a construction site is improved, and the influence on urban traffic is reduced. On the other hand, the method for adjusting the urban bridge reverse slope with large altitude difference monitors the bridge jacking in the jacking construction process through a monitoring system (a plurality of displacement sensors), and ensures that the jacking is carried out synchronously at the same angle and at the same speed.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a method for large-altitude-difference reverse slope adjustment of an urban bridge according to an embodiment of the invention.
Fig. 2 is a schematic layout of a jack and a displacement sensor according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 and 2, the invention provides a method for large-altitude-difference reverse slope adjustment of an urban bridge, which comprises the following steps:
s1: the method comprises the steps that steel supports are arranged on a plurality of pier stud bearing platforms 11 at the bottom of a downhill section 1 of an original urban bridge respectively, the pier stud bearing platforms 11 are arranged at intervals along the length direction of the downhill section 1, and the steel supports are arranged in a gap with the bottom of the downhill section 1.
As shown in fig. 1, the downhill section of the original urban bridge is supported by old piers 12 on a plurality of pier caps. The method for adjusting the slope of the urban bridge in the large-altitude-difference reverse direction utilizes the original pier stud bearing platform 11 and the old pier stud 12 as the counter force foundation of the jack. And positioning and installing a steel support on the pier stud bearing platform.
In the present embodiment, the steel support is a steel pipe support.
In some embodiments, the steel support is a steel box spacer.
And a gap is formed between the steel support and the bottom of the box girder of the downhill section.
S2: and the steel supports on the pier column bearing platforms 11 are provided with jacking jacks 2, and the jacking jacks 2 on the pier column bearing platforms 11 are connected with a controller.
And a jacking jack 2 is arranged in a gap between the steel support and the bottom of the box girder of the downhill section and used for jacking the downhill section.
Specifically, the jacking jacks are arranged as shown in fig. 2.
In this embodiment, the jacking jacks 2 on the plurality of pier caps 11 are connected to the controller.
S3: the bottom installation in downhill path section 1 connects in the multichannel displacement sensor 3 of controller, multichannel displacement sensor 3's position and a plurality of jacking jack 2's on the pier stud cushion cap 11 position one-to-one.
With continued reference to fig. 2, the left-right direction shown in fig. 2 is the length direction of the downhill segment. And a plurality of displacement sensors are arranged at the bottom of the box girder of the downhill section and used for acquiring the jacking height of the box girder of the downhill section. And a displacement sensor is correspondingly arranged beside each jacking jack.
S4: the controller controls the jacking jacks 2 on the pier stud bearing platforms 11 to synchronously jack the downhill section 1, and the lower end of the downhill section 1 is upwards overturned and lifted by taking the upper end of the downhill section 1 as a fulcrum, so that the downhill section 1 and the newly-built urban bridge are arranged in the same direction.
As a preferred embodiment, after the jacking jack 2 jacks the downhill section 1, the old support on the old pier stud 12 on the pier stud platform 11 is removed and the following jack 4 is installed in situ to support the downhill section 1, the following jack 4 being connected to the controller.
Specifically, the box girder of the downhill section is pre-jacked before the downhill section is formally jacked. And (3) removing the original support on the old pier stud after pre-jacking (jacking for 10mm), arranging a mechanical following jack at the position corresponding to the original support, and carrying out the whole-process following protection by the mechanical following jack when the jacking jack jacks the downhill section.
In the invention, the upper end of the downhill section bridge is used as a hinge point for jacking and is fixed without jacking, and the jacking jacks on other pier column bearing platforms jack up and lift up the lower end of the downhill section as a circle center to carry out integral rotary type equal proportion jacking. The jacking is realized by synchronously controlling the jacking jacks on all pier stud bearing platforms through a controller (namely a PLC computer) and integrally jacking the box girder at the downhill section by adopting a method of jacking at the same angular speed and equal proportion to realize the elevation of the bridge.
The operation of the jacking jack is stopped after each jacking, workers add a gasket under the jacking jack, the following jack supports the beam body of the downhill section, and after the gasket is added, the jacking jack continues the next jacking action. In addition, when the jacking jack breaks down, the following jack is taken as a standby jack to jack immediately, so that the occurrence of jacking safety accidents is avoided.
S5: and after the posture of the downhill section 1 is adjusted, replacing the pier stud 12 on the pier stud bearing platform 11 to support the posture-adjusted downhill section 1.
And (3) after the box girder at the downhill section is jacked in place (the height is about 10mm), dismantling the following jack, reforming or replacing the old pier stud and abutment, pouring a pad stone and installing a support after the construction is finished, and dropping the girder after the strength of the pad stone reaches the design strength value (the jacking jack is in a 5-7mm off-center state when the girder dropping is finished).
In the method for adjusting the slope of the urban bridge reversely with the large height difference, the existing pier stud bearing platform and the pier stud are used as the counter force foundation of the jacking jack and the following jack. On the basis of the counter force, a steel support (steel box cushion block) is adopted as a supporting frame for bridge jacking construction.
In the method for large-altitude-difference reverse slope adjustment of the urban bridge, the jacking jack and the follow-up jack are combined and applied, the jacking speed is controlled, and the existing bridge is jacked according to a plan.
In the method for large-altitude-difference reverse slope adjustment of the urban bridge, a PLC is used as a controller to synchronously control the operation of the jacking jack and the following jack. The jacking hydraulic jack has the functions of mechanical locking and hydraulic pressure maintaining. The following jack has the functions of hydraulic drive, mechanical bearing and automatic following.
In the method for large-altitude-difference reverse slope adjustment of the urban bridge, the displacement sensor is arranged at the beam bottom of the downhill section, so that the jacking height of the beam body of the downhill section is ensured to be uniformly and linearly increased.
The method for regulating the slope of the urban bridge in the large-altitude-difference reverse direction utilizes the transformation of the existing bridge landing section to realize the direct connection with the newly-built bridge, shortens the engineering construction period, reduces the construction cost, improves the safety and civilization standard of the construction site, and reduces the influence on urban traffic.
According to the method for large-altitude-difference reverse slope adjustment of the urban bridge, the bridge jacking in the jacking construction process is monitored through a monitoring system (a plurality of displacement sensors), and the synchronous, same-angle and same-speed jacking is guaranteed.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. A method for large-altitude-difference reverse slope regulation of an urban bridge is characterized by comprising the following steps:
respectively arranging steel supports on a plurality of pier stud bearing platforms at the bottom of a downhill section of an original urban bridge, wherein the pier stud bearing platforms are arranged at intervals along the length direction of the downhill section, and the steel supports are arranged at intervals with the bottom of the downhill section;
installing jacking jacks on the steel supports on the pier column bearing platforms, and connecting the jacking jacks on the pier column bearing platforms with a controller;
installing a plurality of displacement sensors connected to the controller at the bottom of the downhill section, wherein the positions of the plurality of displacement sensors correspond to the positions of the jacking jacks on the pier stud bearing platforms one by one;
the controller controls the jacking jacks on the pier stud bearing platforms to synchronously jack the downhill sections, and the upper ends of the downhill sections are used as pivots to upwards overturn and lift the lower ends of the downhill sections, so that the downhill sections and the newly-built urban bridge are arranged in the same direction;
and after the posture of the downhill section is adjusted, replacing the old pier stud on the pier stud bearing platform to support the downhill section with the adjusted posture.
2. The method for reverse slope adjustment of the urban bridge with large height difference according to claim 1, wherein the plurality of jacking jacks on the pier cap adopt equal-proportion jacking of the downhill sections at consistent angular speed.
3. The method for reverse slope adjustment of the urban bridge with large altitude difference according to claim 1, wherein after the jacking jacks jack up the downhill section, old supports on old piers on the pier cap are removed and following jacks are installed in situ to support the downhill section, the following jacks being connected to the controller.
4. The method for large-altitude-difference reverse slope adjustment of the urban bridge according to claim 1, wherein the steel support is a steel pipe support.
5. The method for large-altitude-difference reverse slope adjustment of the urban bridge according to claim 1, wherein the steel supports are steel box spacers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111621929.2A CN114232518A (en) | 2021-12-28 | 2021-12-28 | Method for large-altitude-difference reverse slope adjustment of urban bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111621929.2A CN114232518A (en) | 2021-12-28 | 2021-12-28 | Method for large-altitude-difference reverse slope adjustment of urban bridge |
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| CN114232518A true CN114232518A (en) | 2022-03-25 |
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| CN202111621929.2A Pending CN114232518A (en) | 2021-12-28 | 2021-12-28 | Method for large-altitude-difference reverse slope adjustment of urban bridge |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808383A (en) * | 2012-07-30 | 2012-12-05 | 中交第三航务工程局有限公司 | Construction process for back-sloping and jacking curved bridge |
| CN103205940A (en) * | 2013-04-22 | 2013-07-17 | 成都建筑工程集团总公司 | Slope-variable proportional alternate jacking construction method for continuous beam bridges |
| CN203977296U (en) * | 2014-06-30 | 2014-12-03 | 中铁二十四局集团有限公司路桥分公司 | A kind of device for bridge equal proportion supertronic integral jacking |
| CN105507168A (en) * | 2015-12-30 | 2016-04-20 | 中交第三航务工程局有限公司 | Multi-span box girder integral ultrahigh alternate jacking construction system and method |
| CN113216014A (en) * | 2021-04-26 | 2021-08-06 | 浙江交工集团股份有限公司 | Construction method of viaduct slope-adjusting elevated-junction jacking structure |
| CN214656377U (en) * | 2020-11-25 | 2021-11-09 | 广东冠粤路桥有限公司 | Bridge jacking slope adjusting structure |
-
2021
- 2021-12-28 CN CN202111621929.2A patent/CN114232518A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808383A (en) * | 2012-07-30 | 2012-12-05 | 中交第三航务工程局有限公司 | Construction process for back-sloping and jacking curved bridge |
| CN103205940A (en) * | 2013-04-22 | 2013-07-17 | 成都建筑工程集团总公司 | Slope-variable proportional alternate jacking construction method for continuous beam bridges |
| CN203977296U (en) * | 2014-06-30 | 2014-12-03 | 中铁二十四局集团有限公司路桥分公司 | A kind of device for bridge equal proportion supertronic integral jacking |
| CN105507168A (en) * | 2015-12-30 | 2016-04-20 | 中交第三航务工程局有限公司 | Multi-span box girder integral ultrahigh alternate jacking construction system and method |
| CN214656377U (en) * | 2020-11-25 | 2021-11-09 | 广东冠粤路桥有限公司 | Bridge jacking slope adjusting structure |
| CN113216014A (en) * | 2021-04-26 | 2021-08-06 | 浙江交工集团股份有限公司 | Construction method of viaduct slope-adjusting elevated-junction jacking structure |
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