CN215052160U - Differentiation jacking device suitable for continuous roof beam of large-tonnage multispan - Google Patents
Differentiation jacking device suitable for continuous roof beam of large-tonnage multispan Download PDFInfo
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- CN215052160U CN215052160U CN202120607682.8U CN202120607682U CN215052160U CN 215052160 U CN215052160 U CN 215052160U CN 202120607682 U CN202120607682 U CN 202120607682U CN 215052160 U CN215052160 U CN 215052160U
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Abstract
The utility model discloses a differentiation jacking device suitable for continuous roof beam is striden to large-tonnage many, include: the jacking device comprises a plurality of hydraulic jacks, and any hydraulic jack is connected with an oil pump; the jacking device is arranged between the bridge abutment below and the continuous beam bottom above; the displacement monitoring device is arranged between the bridge abutment and the bottom of the continuous beam and is used for monitoring the displacement generated by jacking the continuous beam; the stress monitoring device is arranged on the bottom surface of the continuous beam bottom and used for monitoring the stress borne by the continuous beam bottom; and the PLC is connected with the displacement monitoring device and the stress monitoring device and also connected with the oil pump. The utility model discloses can reflect the roof beam body vertical displacement volume and roof beam body stress condition directly perceived at the jacking in-process, guarantee the roof beam body at the in-process structural stability of vertical jacking.
Description
Technical Field
The utility model relates to a synchronous jacking construction technical field of bridge. More specifically, the utility model relates to a differentiation jacking device suitable for large-tonnage multi-span continuous beam.
Background
In recent years, the traffic infrastructure of China is taken as a strategic target of the prior development of the country, the rapid increase in the total scale is realized, the road bridge mileage is increased from 89.0 kilometers in 1978 to 510.0 kilometers in 2020, the increase range reaches 5.7 times, and the traffic infrastructure brings great convenience to the life of people. But along with the external natural environment condition, the heavy traffic effect, the bridge is maintained for a long time and other reasons, the height of the vertical curve of the bridge is uneven, and then the uneven settlement of the bridge in the vertical direction is influenced.
The conventional method for solving the problem is to vertically lift a bridge, and how to monitor the vertical displacement and the stress condition of a beam body in the lifting process so as to ensure the structural stability of the beam body in the vertical lifting process is a problem to be considered.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.
In order to realize according to the utility model discloses these objects and other advantages, provide a differentiation jacking device suitable for continuous roof beam is striden to large-tonnage more, a serial communication port, include:
the jacking device comprises a plurality of hydraulic jacks, and any hydraulic jack is connected with an oil pump; the jacking device is arranged between the bridge abutment below and the continuous beam bottom above;
the displacement monitoring device is arranged between the bridge abutment and the bottom of the continuous beam and is used for monitoring the displacement generated by jacking the continuous beam;
the stress monitoring device is arranged on the bottom surface of the continuous beam bottom and used for monitoring the stress borne by the continuous beam bottom;
and the PLC is connected with the displacement monitoring device and the stress monitoring device and also connected with the oil pump.
Preferably, the bridge pier is characterized in that each bridge pier is provided with the jacking device, the displacement monitoring device, the stress monitoring device and the PLC.
Preferably, the jacking devices on all bridge abutments synchronously jack in the same proportion.
Preferably, the bottom of the continuous beam is provided with a beam-end diaphragm plate, and the beam-end diaphragm plate comprises a beam-end middle diaphragm plate and a beam-end side beam diaphragm plate;
in the jacking device, part of the hydraulic jacks are distributed below the middle diaphragm plate of the beam end, and the rest of the hydraulic jacks are distributed below the diaphragm plates of the side beams of the beam end.
Preferably, the displacement monitoring device comprises a plurality of stay cord displacement sensors and a displacement data acquisition device.
Preferably, the displacement monitoring device is arranged at two ends of the bridge abutment, the fixed end of the pull rope sensor is arranged on the bent cap of the bridge abutment 5, and the movable end of the pull rope sensor is fixed on the bottom surface of the beam end horseshoe plate at the bottom of the continuous beam.
Preferably, the stress monitoring device comprises a plurality of resistance strain gauges and stress data acquisition equipment.
Preferably, the plurality of resistance strain gauges are uniformly adhered to the bottom surface of the beam end horseshoe at the bottom of the continuous beam along the length direction of the bridge.
The utility model discloses at least, include following beneficial effect:
1. the utility model discloses except that jacking device does, still set up displacement monitoring device and stress monitoring device, the data that the accessible was monitored reflects the vertical displacement volume of the roof beam body and the roof beam body stress condition of jacking in-process directly perceived, has guaranteed the roof beam body at the in-process structural stability of vertical jacking.
2. The utility model discloses a confirm the single jacking value of every bridge pier to make each bridge pier relative displacement unanimous among the jacking process, thereby realize that the jacking device on all bridge piers carries out the jacking with the proportion in step, avoid the roof beam body to receive extra additional stress and lead to stress damage.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a side view of a jacking device according to an embodiment of the present invention;
fig. 2 is a front view of the jacking device in the above embodiment of the present invention;
fig. 3 is a top view of the coping in the abutment according to the above embodiment of the present invention;
fig. 4 is a bottom view of the continuous beam bottom according to the above embodiment of the present invention.
Detailed Description
The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.
It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1-4, the utility model provides a differentiation jacking device suitable for continuous roof beam is striden to large-tonnage many, a serial communication port, include:
the jacking device 2 comprises a plurality of hydraulic jacks 21, and any hydraulic jack is connected with an oil pump; the jacking device is arranged between the bridge abutment 4 below and the beam bottom of the continuous beam 1 above;
the displacement monitoring device 3 is arranged between the bridge abutment 4 and the bottom of the continuous beam 1 and is used for monitoring the displacement generated when the continuous beam is jacked;
the stress monitoring device 4 is arranged on the bottom surface of the beam bottom of the continuous beam 1 and is used for monitoring the stress applied to the beam bottom of the continuous beam 1;
and the PLC is connected with the displacement monitoring device 3 and the stress monitoring device 4 and is also connected with the oil pump.
In this technical solution, the PLC controller controls the plurality of hydraulic jacks 21 in the jacking device 2 to jack the beam body vertically by sending control signals to the oil pump. The displacement monitoring device 3 is arranged between the bridge abutment 4 and the continuous beam 1 to monitor the displacement value of the hydraulic jack 2 for vertically jacking the continuous beam 1 so as to judge whether the displacement of the continuous beam 1 is consistent with the jack stroke. Stress monitoring devices 5 sets up on the bottom surface of continuous beam 1, when monitoring the jacking 1 internal stress value of continuous beam compares this stress value with stress when becoming the bridge to avoid leading to the roof beam body to appear stress damage because of excessive jacking, thereby guaranteed the roof beam body at the in-process structural stability of vertical jacking.
In another embodiment, each bridge abutment 4 is provided with the jacking device 2, the displacement monitoring device 3, the stress monitoring device 5 and the PLC controller, so that each bridge abutment 4 can be synchronously jacked.
In another embodiment, the jacking devices 2 on all bridge abutments 5 synchronously jack in the same proportion. In the bridge jacking process, the required jacking heights on each bridge abutment 4 are not consistent, so that the single jacking value on each bridge abutment 4 needs to be determined, all bridge abutments 5 can be synchronously jacked in the same proportion, and the generation of structure additional stress caused by asynchronous jacking point displacement is avoided, and further structural crack diseases are caused.
The single jacking value of each bridge abutment 4 is determined according to the requirement of the allowable value of the difference of the top points of the adjacent bridge abutments during jacking in section 17.7.8 of highway bridge culvert construction technical specification (JTGT 3650-2020), after the single jacking value A1 of the bridge abutment where the maximum design jacking value B1 is located is determined, the single jacking value A1 is divided by the design jacking value B1 at the position, and an integer part is taken upwards to obtain the number N of times of jacking. After the jacking times are determined, the other bridge abutments are divided by the respective designed jacking value Bn and the maximum designed jacking value B1 respectively to obtain the ratio Q. Multiplying the ratio Q by the determined single lift value a1, the single lift values An of the other bridge abutments can be determined in turn.
Through the single jacking value of confirming the biggest bridge pier department of design jacking value, confirm the single jacking value of other bridge piers in proper order again, can guarantee that each pier relative displacement is unanimous among the jacking process, avoid the roof beam body to receive extra additional stress and lead to stress damage.
In another embodiment, the bottom of the continuous beam 1 is provided with a beam-end diaphragm 12, and the beam-end diaphragm 12 comprises a beam-end middle diaphragm 122 and a beam-end side beam diaphragm 121; in the jacking device 2, part of the hydraulic jacks 21 are distributed below the beam-end middle diaphragm plate 122, and the rest of the hydraulic jacks 21 are distributed below the beam-end side beam diaphragm plate 121.
In this embodiment, the number of the hydraulic jacks 21 is 10, and 6 hydraulic jacks are arranged in three groups below the beam-end intermediate diaphragm 122. Because the weight of the boundary beam is large, the other 4 hydraulic jacks 21 are divided into two groups and are respectively arranged below the beam-end boundary beam diaphragm 121.
In another embodiment, the displacement monitoring device 3 comprises a plurality of pull-cord displacement sensors 31 and a displacement data acquisition device. The displacement data acquisition equipment receives data monitored by the pull rope displacement sensor 31 and transmits the data to computer equipment in the PLC.
In another embodiment, the displacement monitoring devices 3 are disposed at two ends of the bridge abutment 4, a fixed end of any one of the rope sensors 31 is disposed on the bent cap 41 of the bridge abutment 4, and a movable end thereof is fixed on the bottom surface of the beam-end horseshoe 11 at the bottom of the continuous beam 1. The two ends of the horseshoe plates 11 and the bottom surface of the beam end diaphragm plate 12 are on the same plane, so that the displacement monitoring device 3 can detect the displacement value of the jacking device 2 for vertically jacking the beam body.
In another embodiment, the stress monitoring device 5 comprises a plurality of resistive strain gauges 51 and a stress data acquisition device. The stress data acquisition device receives data monitored by the resistance strain gauge 51 and transmits the data to computer equipment in the PLC.
In another embodiment, a plurality of resistance strain gauges 51 are uniformly adhered to the bottom surface of the beam-end horseshoe 3 at the bottom of the continuous beam along the length direction of the bridge.
In the present embodiment, the single jacking value of each bridge abutment 4 is determined before jacking the beam body. And after jacking is started, jacking each bridge pier 4 according to a single jacking value during jacking, holding the load for 5min after each jacking is finished, and continuing jacking next time after no abnormality exists.
Because the stroke of the hydraulic jack 21 is 50mm, after jacking 50mm each time, the temporary steel support is used for jacking tightly. And returning oil to the hydraulic jack 21, converting the load of the beam body to the temporary steel support, arranging a steel cushion block below the hydraulic jack 21 for tight padding, jacking for the next round, circulating the process to the designed jacking height, jacking with the temporary steel support, converting the load of the beam body to the steel support, and recovering the oil by the hydraulic jack 21 to finish the jacking work.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (8)
1. The utility model provides a differentiation jacking device suitable for continuous roof beam is striden to large-tonnage, its characterized in that includes:
the jacking device comprises a plurality of hydraulic jacks, and any hydraulic jack is connected with an oil pump; the jacking device is arranged between the bridge abutment below and the continuous beam bottom above;
the displacement monitoring device is arranged between the bridge abutment and the bottom of the continuous beam and is used for monitoring the displacement generated by jacking the continuous beam;
the stress monitoring device is arranged on the bottom surface of the continuous beam bottom and used for monitoring the stress borne by the continuous beam bottom;
and the PLC is connected with the displacement monitoring device and the stress monitoring device and also connected with the oil pump.
2. The differential jacking device suitable for the large-tonnage multi-span continuous beam according to claim 1, wherein the jacking device, the displacement monitoring device, the stress monitoring device and the PLC are arranged on each bridge abutment.
3. The differential jacking device suitable for the large-tonnage multi-span continuous beam of claim 2, wherein the jacking devices on all bridge abutments synchronously jack up in the same proportion.
4. The differential jacking device suitable for the large-tonnage multi-span continuous beam as claimed in claim 1, wherein a beam-end diaphragm is arranged at the bottom of the continuous beam, and the beam-end diaphragm comprises a beam-end middle diaphragm and a beam-end side beam diaphragm;
in the jacking device, part of the hydraulic jacks are distributed below the middle diaphragm plate of the beam end, and the rest of the hydraulic jacks are distributed below the diaphragm plates of the side beams of the beam end.
5. The differential jacking device suitable for large-tonnage multi-span continuous beams according to claim 1, wherein the displacement monitoring device comprises a plurality of stay cord displacement sensors and displacement data acquisition equipment.
6. The differential jacking device suitable for the large-tonnage multi-span continuous beam as claimed in claim 5, wherein the displacement monitoring devices are arranged at two ends of the bridge abutment, the fixed end of any one of the pull rope sensors is arranged on the cover beam of the bridge abutment 5, and the movable end of the pull rope sensor is fixed on the bottom surface of the beam end horseshoe plate at the bottom of the continuous beam.
7. The differential jacking device suitable for large-tonnage multi-span continuous beams according to claim 1, wherein the stress monitoring device comprises a plurality of resistance strain gauges and stress data acquisition equipment.
8. The differential jacking device suitable for the large-tonnage multi-span continuous beam as claimed in claim 7, wherein a plurality of the resistance strain gauges are uniformly adhered to the bottom surface of the beam end horseshoe at the bottom of the continuous beam along the length direction of the bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120607682.8U CN215052160U (en) | 2021-03-25 | 2021-03-25 | Differentiation jacking device suitable for continuous roof beam of large-tonnage multispan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120607682.8U CN215052160U (en) | 2021-03-25 | 2021-03-25 | Differentiation jacking device suitable for continuous roof beam of large-tonnage multispan |
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| Publication Number | Publication Date |
|---|---|
| CN215052160U true CN215052160U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120607682.8U Active CN215052160U (en) | 2021-03-25 | 2021-03-25 | Differentiation jacking device suitable for continuous roof beam of large-tonnage multispan |
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| CN (1) | CN215052160U (en) |
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2021
- 2021-03-25 CN CN202120607682.8U patent/CN215052160U/en active Active
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