CN113718665A - Bridge pier changing method - Google Patents
Bridge pier changing method Download PDFInfo
- Publication number
- CN113718665A CN113718665A CN202111035798.XA CN202111035798A CN113718665A CN 113718665 A CN113718665 A CN 113718665A CN 202111035798 A CN202111035798 A CN 202111035798A CN 113718665 A CN113718665 A CN 113718665A
- Authority
- CN
- China
- Prior art keywords
- bridge
- pier
- jacking
- existing
- jacking mechanism
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 105
- 238000006073 displacement reaction Methods 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000009424 underpinning Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 16
- 238000010276 construction Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a bridge pier changing method, which is used for underpinning the existing pier of a bridge into a temporary pier and comprises the following steps: arranging the temporary bridge pier at the bottom side of the bridge; arranging a baffle plate on the existing bridge pier and/or the temporary bridge pier and contacting the side wall of the bridge; arranging a jacking mechanism between the existing bridge pier and the bridge and/or between the temporary bridge pier and the bridge; the jacking mechanism drives the bridge to move away from the existing bridge pier so as to release the connection relation between the bridge and the existing bridge pier; and driving the bridge to move towards the temporary bridge pier through the jacking mechanism so that the temporary bridge pier supports the bridge. The technical scheme of the invention aims to solve the technical problems that the overpass has transverse movement and low safety when the piers are changed in the prior art.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a bridge pier changing method.
Background
Subways are rail traffic that relieves ground traffic, and most of them build the city underground. In the subway construction process, the stratum needs to be excavated, and certain influence is caused on ground building facilities; for example, in the process of building a subway station hall, a foundation pit needs to be dug deeply, inevitably, part of the foundation pit is arranged at the lower side of the overpass and the like due to dense ground building facilities, and at the moment, the bridge piers of the overpass need to be replaced, so that the bridge piers need to be replaced.
In the prior art, when the pier is replaced, the overpass has transverse movement and low safety.
Disclosure of Invention
The invention mainly aims to provide a bridge pier changing method, and aims to solve the technical problems that an overpass has transverse movement and low safety when piers are changed in the prior art.
The invention provides a bridge pier changing method, which is used for underpinning the existing bridge pier of a bridge into a temporary bridge pier and comprises the following steps:
arranging the temporary bridge pier at the bottom side of the bridge;
arranging a baffle plate on the existing bridge pier and/or the temporary bridge pier and contacting the side wall of the bridge;
arranging a jacking mechanism between the existing bridge pier and the bridge and/or between the temporary bridge pier and the bridge;
driving the bridge to move away from the existing bridge pier through the jacking mechanism; so as to release the connection relation between the bridge and the existing bridge pier;
and driving the bridge to move towards the temporary bridge pier through the jacking mechanism so that the temporary bridge pier supports the bridge.
Optionally, the step of installing a jacking mechanism between the existing bridge pier and the bridge and/or between the temporary bridge pier and the bridge comprises: determining the setting position of the jacking mechanism; setting a stiffening plate on the bottom wall of the bridge based on the setting position; connecting a push rod of the jacking mechanism with the stiffening plate; and connecting the base of the jacking mechanism with the existing pier and/or the temporary pier.
Optionally, the existing bridge pier comprises a first support, and the first support is used for supporting the bridge; stretch out climbing mechanism's push rod, through climbing mechanism drive the bridge deviates from existing pier removes, in order to relieve the bridge with the step of existing pier's relation of connection includes: starting the jacking mechanism, wherein a push rod of the jacking mechanism extends out to push the bridge to move away from the existing bridge pier; when the bridge deviates from the existing bridge piers and moves to a preset height so that the first support is disconnected with the bridge, the bridge is supported between the bridge and the existing bridge piers and/or between the bridge and the temporary bridge piers by utilizing the support rod, and the first support is detached.
Optionally, the number of the jacking mechanisms is multiple, and each jacking mechanism is provided with a stroke sensing device; starting the jacking mechanism, wherein a push rod of the jacking mechanism extends out to push the bridge to deviate from the step of the movement of the existing pier, and the pier changing method further comprises the following steps: acquiring displacement data of the corresponding jacking mechanism by using the sensing equipment; determining a displacement difference between the jacking mechanisms based on the displacement data; controlling jacking parameters of a plurality of jacking mechanisms based on the displacement difference; the jacking parameters comprise at least one of jacking pressure, jacking speed and jacking displacement.
Optionally, after the step of starting the jacking mechanism and extending a push rod of the jacking mechanism to push the bridge to move away from the existing pier, the pier changing method further includes: measuring the height from a mark point preset on the bridge to the ground; the number of the marking points is multiple, and the relative height difference of the multiple marking points is calculated; controlling jacking parameters of the jacking mechanism based on the relative height difference; the jacking parameters comprise at least one of jacking pressure, jacking speed and jacking displacement.
Optionally, after the step of starting the jacking mechanism and extending a push rod of the jacking mechanism to push the bridge to move away from the existing pier, the pier changing method further includes: measuring safety parameters of a steel structure of the bridge; the safety parameter comprises at least one of a deformation amount, a displacement amount and a stress value; and under the condition that the safety parameters meet preset safety reference values, continuing to move the bridge away from the existing bridge pier until the bridge deviates from the existing bridge pier and moves to the preset height.
Optionally, the temporary pier is provided with a second support provided with a steel wedge for fastening the bridge.
Optionally, before the step of driving the bridge beam to move away from the existing bridge pier through the jacking mechanism to release the connection relationship between the bridge beam and the existing bridge pier, the bridge pier changing method further comprises the following steps: and disconnecting the telescopic compensation structure between the bridge and the adjacent bridge.
Optionally, the number of the baffles is two, and the two baffles are respectively arranged on two opposite side walls of the bridge.
Optionally, the jacking mechanism is a jack.
The invention provides a bridge pier changing method, which is characterized in that a temporary pier is preset at the lower side of a bridge needing to be changed with an existing pier; arranging the baffle plates on the existing bridge piers and/or temporary bridge piers and contacting the side walls of the bridge; arranging a jacking mechanism between the existing bridge pier and the bridge and/or between the temporary bridge pier and the bridge; extending out of a push rod of the jacking mechanism, and moving the bridge away from the existing bridge pier so as to release the connection relation between the bridge and the existing bridge pier; and retracting the push rod of the jacking mechanism, and moving the bridge towards the temporary bridge pier so that the temporary bridge pier supports the bridge. At the moment, in the jacking process and the retracting process of the jacking mechanism, the baffle has a righting effect, so that the movement of the bridge in the transverse direction (namely the movement of the bridge in the slope direction) can be limited, and the risk of the transverse movement of the bridge is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic process flow diagram of an embodiment of a method for replacing piers of a bridge according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a bridge pier changing method.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
400 | |
| 200 | |
500 | |
| 300 | Jacking mechanism |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the prior art, part of the gate bridge has a slope in the bending direction due to the influence of radian setting, so that the lateral movement in the slope direction can be realized in the jacking process, and the pier changing safety of the bridge is influenced. Therefore, the technical scheme of the embodiment of the invention provides a bridge pier changing method, which is used for underpinning the existing bridge pier of the bridge into a temporary bridge pier and comprises the following steps:
arranging the temporary pier at the bottom side of the bridge 100;
arranging the barrier 200 on the existing bridge pier and/or the temporary bridge pier and contacting the side wall of the bridge 100;
arranging a jacking mechanism 300 between the existing bridge pier and the bridge 100 and/or between the temporary bridge pier and the bridge 100;
the jacking mechanism 300 drives the bridge 100 to move away from the existing bridge pier so as to release the connection relationship between the bridge 100 and the existing bridge pier;
the bridge beam 100 is driven to move toward the temporary pier by the jacking mechanism 300, so that the temporary pier supports the bridge beam 100.
The embodiment of the invention provides a method for replacing piers of a bridge 100, which is characterized in that a temporary pier is arranged in advance at the lower side of the bridge 100, where the existing pier needs to be replaced; the barrier 200 is installed at an existing pier and/or a temporary pier, and contacts the side wall of the bridge 100; arranging a jacking mechanism 300 between the existing bridge pier and the bridge 100 and/or between the temporary bridge pier and the bridge 100; the jacking mechanism 300 drives the bridge 100 to move away from the existing bridge pier so as to release the connection relationship between the bridge 100 and the existing bridge pier; the bridge beam 100 is driven to move toward the temporary pier by the jacking mechanism 300, so that the temporary pier supports the bridge beam 100. At this time, during the jacking process and the retracting process of the jacking mechanism 300, the baffle 200 has a righting effect, so that the movement of the bridge 100 in the transverse direction (i.e. the movement in the slope direction of the bridge) can be limited, and the risk of the transverse movement of the bridge 100 is reduced.
In a specific implementation process, the temporary pier is arranged at the bottom side of the bridge 100: after the foundation construction of the temporary pier is completed and the temporary pier is fabricated, the temporary pier is hoisted to the lower side of the bridge 100, and the temporary pier is vertically installed at the lower side of the bridge 100.
In a specific implementation, the barrier 200 is vertically installed and anchored to a temporary pier and/or an existing pier, and the side surface of the barrier 200 is in contact with the side wall of the bridge 100. The baffle 200 is preferably an i-steel structure. The baffle 200 may be plural and arranged at intervals along the bending direction of the bridge 100.
In a specific implementation process, the push rod of the jacking mechanism 300 is arranged at the lower side of the bridge 100, and the installation seat of the jacking mechanism 300 is fixedly installed on an existing bridge pier and/or a temporary bridge pier. Generally, a plurality of jacking mechanisms 300 are symmetrically arranged on two sides of the bridge 100, so that the uniformity of thrust and the synchronism of pushing or retracting are ensured, and the damage or damage to the bridge 100 caused by local overlarge internal force due to uneven internal force of the bridge 100 during jacking is prevented.
As an optional implementation manner of the above embodiment, the step of disposing the jacking mechanism 300 between the existing bridge pier and the bridge 100 and/or between the temporary bridge pier and the bridge 100 includes:
determining the setting position of the jacking mechanism 300; the setting position of the jacking mechanism 300 is derived from engineering design drawings;
arranging stiffening plates 500 on the bottom wall of the bridge 100 based on the arrangement position; since the action area of the push rod of the jacking mechanism 300 is small, if the push rod directly acts on the bridge 100, the local pressure of the bridge 100 is too large, so that the bridge 100 is locally deformed, the stiffening plate 500 is installed on the bottom wall of the bridge 100, the stiffening plate 500 is a plate with an area, the push rod can be dispersedly acted on the bridge 100, and the bridge 100 is lifted; and the stiffening plate 500 has an extension length in the vertical direction, which can reduce the height difference between the jacking mechanism 300 and the bridge 100, so that the push rod of the jacking mechanism 300 can push the bridge 100 under the condition of a small extension amount.
Connecting a push rod of the jacking mechanism 300 with the stiffening plate 500; and connecting the base of the jacking mechanism 300 with the existing pier and/or the temporary pier. The push rod of the jacking mechanism 300 and the stiffening plate 500 can be connected by means of threaded connection, welding and the like. The base of the jacking mechanism 300 may be anchored to the existing pier and/or the temporary pier.
As an alternative to the above embodiment, the existing bridge pier includes a first support 400 for supporting the bridge 100; the step of driving the bridge beam 100 to move away from the existing bridge pier through the jacking mechanism 300 to release the connection relationship between the bridge beam 100 and the existing bridge pier comprises: starting the jacking mechanism 300, wherein a push rod of the jacking mechanism 300 extends out to push the bridge 100 to move away from the existing bridge pier; the jacking mechanism 300 is controlled in a hydraulic control mode, and the jacking mechanism 300 is a jack; the jacking mechanism 300 further comprises a hydraulic pump, and the hydraulic pump is connected with an oil pipe of a hydraulic jacking device of the jack: when connecting an oil pipe, the combined gasket in the oil pipe joint is taken out, and an O-shaped ring is arranged on the corresponding pipe joint or butt joint; the lower oil pipe should be connected first to prevent the oil in the oil pipe from flowing back. The hydraulic pump source system and the oil pipes between the hydraulic lifters are in one-to-one correspondence and are connected one by one; the oil pipes are connected in parallel or in series according to the scheme, so that the correctness is ensured, and the comprehensive reexamination is carried out after the oil pipes are connected. After the hydraulic system is installed, debugging is carried out according to the following steps: checking whether joints of all valves or oil pipes on the hydraulic pump source system are loosened or not, and checking whether a pressure regulating spring of the overflow valve is in a completely loosened state or not. And checking whether the connection of a power line and a communication cable between the control cabinet of the hydraulic pump source system and the hydraulic jacking device is correct or not. And checking whether the oil pipe connection between the hydraulic pump source system and the hydraulic jacking device main oil cylinder is correct or not. And (5) the system is powered on, and whether the rotation direction of the main shaft of the hydraulic pump is correct or not is checked. And under the condition that the hydraulic pump source system is not started, corresponding buttons in the control cabinet are manually operated to check whether the actions of the electromagnetic valve and the stop valve are normal or not and whether the serial number of the stop valve corresponds to the serial number of the hydraulic jacking device or not. The sensors of the travel sensing device are checked and the corresponding signal lights in the local control box are signaled. Checking before operation: starting a hydraulic pressure pump source system, adjusting certain pressure, and stretching a hydraulic jacking device main oil cylinder: checking whether the oil pipe connection of the cavity A and the cavity B is correct; and checking whether the stop valve can stop the corresponding oil cylinder or not. When the jacking mechanism 300 is started, the cylinder extending pressure of the hydraulic jacking device is gradually increased to 20%, 40% and 60% of the required pressure, and under all normal conditions, the hydraulic jacking device can be continuously loaded to 70%, 80%, 90%, 95% and 100% until the jacking units are completely separated from the assembled jig frame.
When the bridge 100 moves away from the existing bridge piers to a preset height so that the first support 400 is disconnected from the bridge 100, the first support 400 is supported between the bridge 100 and the existing bridge piers and/or between the bridge 100 and the temporary bridge piers by using support rods, and the first support 400 is removed. The predetermined height is a predetermined value, such as 20mm, 30mm, 40mm, 50mm or more, which is set for facilitating the removal of the first holder 400. After the first support 400 is disconnected from the bridge 100, a support rod needs to be arranged between the existing bridge pier and the bridge 100 and/or between the temporary bridge pier and the bridge 100, so that when the first support 400 is dismantled, the support rod and the jacking mechanism 300 form a stable support system; after the first support 400 is removed, the support rod is also removed.
As an optional implementation manner of the above embodiment, the number of the jacking mechanisms 300 is multiple, and each jacking mechanism 300 is provided with a stroke sensing device; after the step of starting the jacking mechanism 300 and extending a push rod of the jacking mechanism 300 to push the bridge 100 to move away from the existing bridge pier, the bridge pier changing method further comprises the following steps:
acquiring displacement data of the corresponding jacking mechanism 300 by using the sensing equipment; determining a displacement difference between the jacking mechanisms 300 based on the displacement data; controlling jacking parameters of the plurality of jacking mechanisms 300 based on the displacement difference; the jacking parameters comprise at least one of jacking pressure, jacking speed and jacking displacement. The stroke sensing equipment can be a stroke sensor, and each jacking mechanism 300 is provided with a set of stroke sensor for measuring jacking displacement of each jacking mechanism 300 in the jacking process so as to ensure synchronism in the jacking process. Specifically, each jacking mechanism 300 has a stroke sensor, so that a plurality of displacements can be acquired, and the main control computer controls jacking parameters of the jacking mechanism 300, such as at least one of jacking pressure, jacking speed and jacking displacement, according to displacement detection signals and difference values of the sensors, so as to form a closed-loop system of 'sensor-computer-pump source control valve-jacking device control valve-hydraulic jacking device-jacking unit', and control the synchronism of the whole jacking process.
As an optional implementation manner of the above embodiment, after the step of activating the jacking mechanism 300 and extending the push rod of the jacking mechanism 300 to push the bridge beam 100 to move away from the existing bridge pier, the bridge pier changing method further includes:
measuring the height from a mark point preset on the bridge 100 to the ground; the number of the marking points is multiple, and the relative height difference of the multiple marking points is calculated; controlling jacking parameters of the jacking mechanism 300 based on the relative height difference; the jacking parameters comprise at least one of jacking pressure, jacking speed and jacking displacement. And detecting the ground clearance of each mark point by using a measuring instrument, and calculating the relative height difference of each mark point. According to the relative height difference, the jacking mechanism 300 is controlled by the computer to adjust the height of each mark point, so that the jacking mechanism 300 can reach the designed jacking posture.
As an optional implementation manner of the above embodiment, after the step of activating the jacking mechanism 300 and extending the push rod of the jacking mechanism 300 to push the bridge beam 100 to move away from the existing bridge pier, the bridge pier changing method further includes:
measuring safety parameters of a steel structure of the bridge 100; the safety parameter comprises at least one of a deformation amount, a displacement amount and a stress value; and under the condition that the deformation parameter meets a preset safety reference value, continuing to move the bridge 100 away from the existing bridge pier until the bridge 100 moves away from the existing bridge pier to the preset height. Before jacking, to the key node that needs carry out deformation monitoring, the key position is measured, the record data, paste the reflector panel, jacking liftoff back, utilize the total powerstation to carry out retest to steel construction key position during the observation of stewing, obtain the safety parameter, and compare with preset safe reference value, continue the jacking under the prerequisite that satisfies the jacking requirement, in the jacking process, every jacking 200mm, stop the jacking, measure steel construction key position, the record data, compare with preceding, continue the jacking under the prerequisite that satisfies the requirement, real-time supervision, it targets in place to jack up bridge 100.
As an alternative to the above described embodiment, the temporary pier has a second abutment provided with a steel wedge for fastening the bridge 100.
As an optional implementation manner of the above embodiment, before the step of moving the bridge beam 100 away from the existing bridge pier by the jacking mechanism to release the connection relationship between the bridge beam 100 and the existing bridge pier, the bridge beam 100 pier changing method further includes: breaking the expansion compensation joints between the bridge 100 and the adjacent bridge 100. The expansion compensation mechanism is disconnected, that is, the expansion joint between the bridge 100 and the adjacent bridge 100 is disconnected, so that the bridge 100 becomes an independent pier unit to be replaced, and the adjacent bridge 100 is not affected.
As an optional implementation manner of the above embodiment, there are two baffles 200, and the two baffles 200 are respectively disposed on two opposite side walls of the bridge 100. The baffle 200 is disposed on two side walls of the bridge 100, so that the bridge 100 is limited to move up and down in a vertical space without moving in the slope direction, thereby improving the safety of the bridge 100 during moving and ensuring that the internal force of the bridge 100 is substantially uniform during moving.
Based on the above embodiments, the present embodiment provides a specific method for replacing a bridge 100, which includes setting a jack on a temporary bridge pier to replace:
after the construction of the steel structure joist (temporary bridge pier) is finished, the stress conversion of a girder body is carried out, a jack is installed on a beam of the steel structure joist, the jacking work is slowly and uniformly increased, adverse effects caused by sudden change of the load force of piles and the beam are avoided, the oil jack is required to synchronously work in the jacking process of each stage, monitoring data and loading data are continuously recorded, data analysis is carried out, the next stage of jacking is guided to carry out corresponding adjustment, the pressure and displacement of the jack are controlled according to the information feedback of a monitoring system in the jacking, the balance of the underpinned girder is achieved, after the design prestress maximum value is reached and the load is kept for enough time, the underpinned load conversion is completed when the settlement speed of the underpinned pile is less than 0.1mm/h, the jack is locked, and then the bridge 100 is jacked by a method of adding a steel wedge on a second support which is placed on the underpinned beam in advance; monitoring is carried out on the steel box girder in the jacking process, particularly on settlement, stress, cracks, deformation and displacement, and the safety and effectiveness of load conversion are ensured.
And (3) conversion of an original structure stress system:
after the construction of the steel structure joist is completed, the load of the buttress of the original structure needs to be converted to the steel structure joist, and the specific implementation method comprises the following steps:
(1) a 200T hydraulic jack with the height of 316mm is adopted and is arranged at the position of an original structure support accessory;
(2) removing bolts of the first support 400 of the existing pier to separate the first support 400 from the steel box girder and the pier of the original structure;
(3) synchronously jacking the steel box girder by 30mm by adopting 6 hydraulic jacks of 200T;
(4) the support saddle of the original structure is dismantled,
(5) and (5) synchronously unloading, and converting the load of the steel box girder to the steel structure joist.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a bridge trades mound method to underpin the existing pier of bridge for interim pier, its characterized in that includes:
arranging the temporary bridge pier at the bottom side of the bridge;
arranging a baffle plate on the existing bridge pier and/or the temporary bridge pier and contacting the side wall of the bridge;
arranging a jacking mechanism between the existing bridge pier and the bridge and/or between the temporary bridge pier and the bridge;
the jacking mechanism drives the bridge to move away from the existing bridge pier so as to release the connection relation between the bridge and the existing bridge pier;
and driving the bridge to move towards the temporary bridge pier through the jacking mechanism so that the temporary bridge pier supports the bridge.
2. The bridge pier changing method of claim 1, wherein the step of arranging a jacking mechanism between the existing bridge pier and the bridge and/or between the temporary bridge pier and the bridge comprises:
determining the setting position of the jacking mechanism;
setting a stiffening plate on the bottom wall of the bridge based on the setting position;
connecting a push rod of the jacking mechanism with the stiffening plate;
and connecting the base of the jacking mechanism with the existing pier and/or the temporary pier.
3. The bridge pier changing method according to claim 1, wherein the existing bridge pier comprises a first support for supporting the bridge;
the step of driving the bridge to depart from the existing bridge pier to move through the jacking mechanism so as to remove the connection relation between the bridge and the existing bridge pier comprises the following steps:
starting the jacking mechanism, wherein a push rod of the jacking mechanism extends out to push the bridge to move away from the existing bridge pier;
when the bridge deviates from the existing bridge piers and moves to a preset height so that the first support is disconnected with the bridge, the bridge is supported between the bridge and the existing bridge piers and/or between the bridge and the temporary bridge piers by utilizing the support rod, and the first support is detached.
4. The bridge pier changing method according to claim 3, wherein the number of the jacking mechanisms is multiple, and each jacking mechanism is provided with a stroke sensing device;
starting the jacking mechanism, wherein a push rod of the jacking mechanism extends out to push the bridge to deviate from the step of the movement of the existing pier, and the pier changing method further comprises the following steps:
acquiring displacement data of the corresponding jacking mechanism by using the sensing equipment;
determining a displacement difference between the jacking mechanisms based on the displacement data;
controlling jacking parameters of a plurality of jacking mechanisms based on the displacement difference; the jacking parameters comprise at least one of jacking pressure, jacking speed and jacking displacement.
5. The bridge pier changing method of claim 3,
after the step of starting the jacking mechanism and extending a push rod of the jacking mechanism to push the bridge to deviate from the existing bridge pier to move, the bridge pier changing method further comprises the following steps:
measuring the height from a mark point preset on the bridge to the ground; wherein the number of the marking points is a plurality,
calculating relative height differences of the plurality of marked points;
controlling jacking parameters of the jacking mechanism based on the relative height difference; the jacking parameters comprise at least one of jacking pressure, jacking speed and jacking displacement.
6. The bridge pier changing method of claim 3, wherein after the step of activating the jacking mechanism and extending the push rod of the jacking mechanism to push the bridge to move away from the existing bridge piers, the bridge pier changing method further comprises:
measuring safety parameters of a steel structure of the bridge; the safety parameter comprises at least one of a deformation amount, a displacement amount and a stress value;
and under the condition that the safety parameters meet preset safety reference values, continuing to move the bridge away from the existing bridge pier until the bridge deviates from the existing bridge pier and moves to the preset height.
7. A method according to any one of claims 1 to 6, wherein said temporary pier has a second abutment provided with a steel wedge for securing said bridge.
8. The bridge pier changing method of any one of claims 1 to 6, wherein before the step of driving the bridge to move away from the existing bridge piers by the jacking mechanism to release the connection relationship between the bridge and the existing bridge piers, the bridge pier changing method further comprises:
and disconnecting the telescopic compensation structure between the bridge and the adjacent bridge.
9. The bridge pier changing method according to any one of claims 1 to 6, wherein the number of the baffle plates is two, and the two baffle plates are respectively arranged on two opposite side walls of the bridge.
10. A method for replacing piers in a bridge according to any one of claims 1 to 6, wherein the jacking mechanism is a jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111035798.XA CN113718665A (en) | 2021-09-02 | 2021-09-02 | Bridge pier changing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111035798.XA CN113718665A (en) | 2021-09-02 | 2021-09-02 | Bridge pier changing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113718665A true CN113718665A (en) | 2021-11-30 |
Family
ID=78681674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111035798.XA Pending CN113718665A (en) | 2021-09-02 | 2021-09-02 | Bridge pier changing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113718665A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150674A (en) * | 2021-12-09 | 2022-03-08 | 中冶建筑研究总院（深圳）有限公司 | Foundation pit upright post underpinning method |
| CN114577102A (en) * | 2022-02-25 | 2022-06-03 | 四川交大工程检测咨询有限公司 | Bridge multipoint synchronous movement real-time monitoring method and system and readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012158956A (en) * | 2011-02-02 | 2012-08-23 | Maeda Corp | Replacement method of railway viaduct |
| CN203755184U (en) * | 2014-03-10 | 2014-08-06 | 中交三公局桥梁隧道工程有限公司 | Bridge support replacement synchronous jacking system |
| CN103981816A (en) * | 2014-04-15 | 2014-08-13 | 河南省公路工程局集团有限公司 | Construction method for underpinning of overpass framework pier columns |
| CN104005342A (en) * | 2014-05-28 | 2014-08-27 | 北京市政建设集团有限责任公司 | Method and device for dynamic synchronous jacking compensation of bridge distortion |
| CN213476666U (en) * | 2020-09-27 | 2021-06-18 | 中铁二十局集团第一工程有限公司 | Limiting device for main pier during integral jacking of main bridge steel box girder |
| CN213571599U (en) * | 2020-09-30 | 2021-06-29 | 中交路桥华南工程有限公司 | Bridge jacking limiting device |
-
2021
- 2021-09-02 CN CN202111035798.XA patent/CN113718665A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012158956A (en) * | 2011-02-02 | 2012-08-23 | Maeda Corp | Replacement method of railway viaduct |
| CN203755184U (en) * | 2014-03-10 | 2014-08-06 | 中交三公局桥梁隧道工程有限公司 | Bridge support replacement synchronous jacking system |
| CN103981816A (en) * | 2014-04-15 | 2014-08-13 | 河南省公路工程局集团有限公司 | Construction method for underpinning of overpass framework pier columns |
| CN104005342A (en) * | 2014-05-28 | 2014-08-27 | 北京市政建设集团有限责任公司 | Method and device for dynamic synchronous jacking compensation of bridge distortion |
| CN213476666U (en) * | 2020-09-27 | 2021-06-18 | 中铁二十局集团第一工程有限公司 | Limiting device for main pier during integral jacking of main bridge steel box girder |
| CN213571599U (en) * | 2020-09-30 | 2021-06-29 | 中交路桥华南工程有限公司 | Bridge jacking limiting device |
Non-Patent Citations (1)
| Title |
|---|
| 上海申通地铁集团有限公司: "城市轨道交通桥隧技术", 中国建材工业出版社, pages: 192 - 193 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114150674A (en) * | 2021-12-09 | 2022-03-08 | 中冶建筑研究总院（深圳）有限公司 | Foundation pit upright post underpinning method |
| CN114150674B (en) * | 2021-12-09 | 2023-10-03 | 中冶建筑研究总院（深圳）有限公司 | Foundation pit upright post underpinning method |
| CN114577102A (en) * | 2022-02-25 | 2022-06-03 | 四川交大工程检测咨询有限公司 | Bridge multipoint synchronous movement real-time monitoring method and system and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109797665B (en) | Active underpinning jacking force determination and displacement control method for hyperstatic structure bridge pile foundation | |
| CN113718665A (en) | Bridge pier changing method | |
| KR102036839B1 (en) | Vibration abatement type lifting device for replacing and repairing bridges for bridge support and its construction method applying computer control method | |
| KR101248838B1 (en) | A lifting jack of upper structure of bridge and method for changing bridge bearings using them | |
| CN109629461A (en) | A method of it does not break off a friendship and carries out cast-in-situ box girder reset and bearing replacement | |
| CN110230328A (en) | Pile foundation underpinning System information construction electronic monitoring method | |
| CN111676835A (en) | Cable-stayed bridge steel box girder pushing construction method | |
| CN102704413B (en) | Construction method for jacking arch bridge | |
| CN211256708U (en) | Synchronous jacking device for replacing bridge support | |
| CN108301332A (en) | The detachable steel trestle construction method of beret slice | |
| CN102704414B (en) | Construction method for jacking arched bridges | |
| CN211256681U (en) | A jacking device that is used for single pier to change support | |
| CN113737667B (en) | Bridge reinforcing system and dynamic reinforcing method | |
| KR101704550B1 (en) | lift method for upper structure of bridge by using computer and hydraulic jack including safety device | |
| CN111236089A (en) | Uneven jacking system and uneven jacking construction method for existing bridge superstructure | |
| CN105155418A (en) | Construction method for bridge horizontal movement | |
| CN210216183U (en) | Deviation brake for continuous bridge junction pier | |
| KR101579604B1 (en) | Bridge pile cutting hydraulic hydraulic tuning system | |
| CN111636464A (en) | Bridge pile foundation conversion method and structure | |
| EP1760201B1 (en) | Method for raising a building | |
| CN113882710B (en) | Integral translation device and method for raft structure with foundation | |
| CN112761081B (en) | Replacement structure and construction method for active ultra-wide beam body support | |
| CN212025950U (en) | Highway roof beam body stop device that rectifies | |
| KR101805068B1 (en) | Bridge lifting device | |
| KR20190143101A (en) | Bridge upper structure raising apparatus and raising method |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211130 |