Full-bridge single-width lifting monitoring system

Abstract

The present invention relates to a whole-bridge single-span jacking monitoring system, comprising: a first dial indicator arranged under each beam plate constituting a beam body, a coordinate detection device arranged at the midpoint of the side span and middle span beam bodies and on the beam body on the bridge pier, a stress tester for monitoring the stress of the beam body, and a displacement sensor for monitoring the jacking displacement of the beam body; the first dial indicator is used to verify the bridge displacement measured by the displacement sensor, and the coordinate detection device is used to verify the value measured by the first dial indicator and the bridge displacement. In the embodiment provided by the present application, by arranging a dial indicator under each beam plate, the jacking height of each beam plate is detected, thereby realizing the control of the deformation of the whole bridge; by arranging a coordinate detection device, the problem that it is inconvenient to place a dial indicator or other measuring device on the cross slope of the beam body in each span is overcome, and at the same time, the control of the overall change of the beam body line shape is realized, and the jacking height of the bridge deck can be effectively controlled.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a full-bridge single-span jacking monitoring system. Background Art

[0002] With the large-scale construction of highways in my country, many existing roads have reached or exceeded their design service life and need to be renovated. The common form of road renovation is to add asphalt pavement after treating the defects of the original concrete pavement, and it is also necessary to lift the original bridge deck to facilitate connection with the new bridge deck. During the single-span lifting process of the entire bridge, the lifting and lowering of the bridge deck is the most important link in the construction of the entire bridge. It is necessary to ensure the linear shape of the bridge deck during the lifting process. Therefore, the height change of the bridge deck during the lifting process of the bridge is monitored to control the lifting amplitude of the bridge deck to meet the requirements and avoid changes in the linear shape of the bridge. However, during the lifting process of the bridge deck, the cross slope of the beam body in each span of the bridge is not convenient for placing the detection equipment during the lifting process, and thus the lifting amplitude of the bridge deck cannot be accurately controlled. At the same time, during the single-span lifting process of the entire bridge, the linear shape of the entire bridge is also difficult to ensure. Summary of the invention

[0003] In order to overcome the above technical problems, especially in the process of bridge deck lifting, the transverse slope of the beam in each span of the bridge is not convenient for placing the detection equipment during the lifting process, and the linear shape of the whole bridge is difficult to guarantee during the lifting of a single span of the whole bridge, the following technical solutions are proposed:

[0004] An embodiment of the present application provides a full-bridge single-span jacking monitoring system, comprising: a first dial indicator arranged under each beam plate constituting a beam body, a coordinate detection device arranged at the midpoint of the side span and middle span beam bodies and on the beam bodies on the piers, a stress tester for monitoring the stress of the beam body, and a displacement sensor for monitoring the jacking displacement of the beam body; the first dial indicator is used to verify the bridge displacement measured by the displacement sensor, and the coordinate detection device is used to verify the value measured by the first dial indicator and the bridge displacement.

[0005] Optionally, coordinate detection sections are provided in the bridge piers and each span, and coordinate detection points of the coordinate detection device are arranged on each coordinate detection section.

[0006] Optionally, three coordinate detection points are distributed on each of the coordinate detection sections.

[0007] Optionally, two of the coordinate detection points are located on both sides of the coordinate detection section in the transverse direction, one of the coordinate detection points is located in the middle of the coordinate detection section, and the coordinate detection points are located on the boundary of the cross section of the beam where the coordinate detection section is located.

[0008] Optionally, the stress tester is located in the middle of the span of the beam.

[0009] Optionally, the stress tester is located at a fulcrum of the continuous beam on the beam body.

[0010] Optionally, it also includes a second dial indicator arranged at the end of each span of the beam.

[0011] Optionally, the second dial indicator is arranged on two opposite sides of the displacement sensor and is spaced 2.5-3.5 cm apart from the displacement sensor.

[0012] Optionally, the second dial indicator is 3 cm away from the displacement sensor.

[0013] Optionally, the first and second dial indicators are arranged on a cap beam at the bottom of the beam or on a supporting structure supporting the beam body.

[0014] Optionally, the contact surfaces between the first and second dial indicators and the bottom of the beam are planes.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The whole bridge single span jacking monitoring system provided in the embodiment of the present application comprises: a first dial gauge arranged under each beam plate constituting the beam body, a coordinate detection device arranged at the midpoint of the side span and middle span beam body and on the beam body on the bridge pier, a stress tester for monitoring the stress of the beam body and a displacement sensor for monitoring the jacking displacement of the beam body; the first dial gauge is used to verify the bridge displacement measured by the displacement sensor, and the coordinate detection device is used to verify the value measured by the first dial gauge and the bridge displacement measured by the displacement sensor. In the embodiment provided by the present application, by arranging a dial gauge under each beam plate, the jacking height of each beam plate is detected to ensure the control of the jacking force and jacking height of each beam plate, thereby realizing the control of the deformation of the whole bridge; by arranging the coordinate detection device, the problem that it is inconvenient to place the dial gauge and other measuring devices on the cross slope of the beam body in each span is overcome, and the overall change of the beam body line shape is controlled at the same time, so that the jacking height of the beam body on each bridge pier has a definite basis, and the jacking height of the bridge deck can be effectively controlled.

[0017] The whole bridge single span jacking monitoring system provided by the embodiment of the present application has coordinate detection sections provided in the bridge piers and each span, and each coordinate detection section is provided with coordinate detection points of the coordinate detection device; three coordinate detection points are distributed on each coordinate detection section; two of the coordinate detection points are located on both sides of the coordinate detection section in the transverse direction of the bridge, one of the coordinate detection points is located in the middle of the coordinate detection section, and the coordinate detection points are located on the boundary of the cross section of the beam body where the coordinate detection section is located. In the embodiment provided by the present application, the elevation control points are distributed on both sides and the middle of the coordinate detection sections in the bridge piers and each span, which solves the problem that it is inconvenient to place measuring equipment such as dial indicators on the transverse slope in each span, ensures that the changes on both sides and the middle of the bridge are within the control range, ensures that the changes in the bridge deck line shape during the jacking process are within the control range, and provides a basis for the overall changes in the line shape during the bridge jacking process.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, which will become obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of the full-bridge single-width jacking monitoring system of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the arrangement positions of coordinate detection points in the full-bridge single-span jacking monitoring system of the present invention. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0023] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of features, integers, steps, operations, but does not exclude the presence or addition of one or more other features, integers, steps, operations.

[0024] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0025] The embodiment of the present application provides a full-bridge single-width jacking monitoring system, such as Figure 1 As shown, it includes: a first dial gauge 10 arranged under each beam plate constituting the beam body, a coordinate detection device 20 arranged at the midpoint of the side span and middle span beam body and on the beam body on the pier, a stress tester 30 for monitoring the stress of the beam body, and a displacement sensor 40 for monitoring the jacking displacement of the beam body; the first dial gauge 10 is used to verify the bridge displacement measured by the displacement sensor 40, and the coordinate detection device 20 is used to verify the value measured by the first dial gauge 10 and the bridge displacement measured by the displacement sensor 40. A full-bridge single-span jacking monitoring system provided in the embodiment of the present application is mainly used in the full-bridge single-span jacking process of a hollow slab beam. The weight of the beam body of the whole bridge is relatively large, so it is particularly important to control the deformation of the bridge during the jacking process. In the embodiment provided in the present application, by setting the first dial indicator under each beam and slab, the lifting height of each beam and slab can be detected, which is convenient for controlling the lifting height of each hollow slab beam, so as to ensure the control of the lifting force and lifting height of each beam and slab, and at the same time, the lifting height of each hollow slab beam can be controlled more accurately, thereby realizing the control of the deformation of the entire bridge.

[0026] Since there is a transverse slope on the beam in each span, and the setting of the dial indicator needs to ensure that the contact surface is a smooth and flat surface, it is not convenient to set a dial indicator on the transverse slope of the beam in each span, and thus it is impossible to detect and control the elevation control points during the bridge jacking process, and it is also impossible to control the line shape during the bridge jacking process. In the embodiment provided by the present application, since the coordinate detection device does not have high requirements on the installation surface, the problem that it is inconvenient to place a dial indicator or other measuring device on the transverse slope of the beam in each span is overcome by setting a coordinate detection device. By detecting the change of the coordinates, the displacement of the elevation control point in each direction is detected and measured, which is convenient for controlling the overall change of the beam line shape, so that the height of the beam jacking on each pier has a definite basis, and the bridge deck jacking height can be effectively controlled.

[0027] During the bridge lifting process, the lifting force affects the lifting amplitude. Therefore, the control of the lifting force is the key control factor in the whole bridge single span lifting process, and the change of the lifting force and the displacement during the lifting process will cause a certain stress in the bridge. In the embodiment provided in the present application, a stress tester is used to detect the change of the beam stress to realize the detection of the bridge stress, ensure that the stress of the beam is within the design range, avoid damage to the bridge structure caused by excessive stress, and avoid excessive stress causing the bridge structure to fail to operate normally.

[0028] In addition, in order to ensure the purpose of synchronous jacking and to ensure the linear shape of the bridge, during the jacking process, displacement sensors are used throughout the process to measure the jacking displacement of the beam body, and the difference in the lift amount of the displacement sensors between all the lifting jacks is monitored in real time. If the difference in the lift amount of the displacement sensors between the jacks exceeds the control value, the lifting force of each jack is adjusted, and the oil supply to the jack with a large dial indicator reading is reduced or the oil supply to the jack with a small dial indicator reading is increased to ensure the purpose of synchronous jacking. At the same time, the workload of jack adjustment is reduced to improve work efficiency and avoid large-scale adjustments to the jacking amount and lifting amplitude of the jacks.

[0029] In the embodiment provided in the present application, the value measured by the first dial indicator is compared with the value measured by the displacement sensor to verify the bridge displacement measured by the displacement sensor to ensure that the bridge jacking height is within a preset range and to correct the measurement error of the displacement sensor. The value measured by the coordinate detection device is compared with the value measured by the first dial indicator and the value measured by the displacement sensor to verify the value measured by the first dial indicator and the bridge displacement. When the absolute value of the deviation between the value of the first dial indicator and the value of the displacement sensor is greater than 2 mm, the jacking operation is stopped immediately to confirm that the jacking height of the bridge elevation control point is consistent with the jacking heights of other positions.

[0030] Optionally, a coordinate detection section is provided in the bridge pier and each span, and a coordinate detection point of a coordinate detection device is provided on each coordinate detection section. The coordinate detection section facilitates the determination of the position of the coordinate detection point and ensures the uniformity of the measured position. Optionally, as Figure 2As shown, three coordinate detection points 2 are distributed on each coordinate detection section of the beam body 1. The three coordinate detection points 2 are convenient for correcting the distance of the section jacking. Optionally, two coordinate detection points are located on both sides of the coordinate detection section in the transverse direction of the bridge, one coordinate detection point is located in the middle of the coordinate detection section, and the coordinate detection point is located on the boundary of the cross section of the beam body where the coordinate detection section is located. That is, the coordinate detection section includes a boundary line located on the bridge deck, and the boundary line is the boundary line of the cross section of the beam body where the coordinate detection section is located. In one embodiment, two coordinate detection points 2 are respectively located at both ends of the boundary line, and one coordinate detection point 2 is located in the middle of the boundary line. In another embodiment, two coordinate detection points 2 are located on the boundary lines on both sides of the cross section of the beam body where the coordinate detection section is located in the transverse direction of the bridge, and one coordinate detection point 2 is located at the midpoint of the boundary line of the cross section of the beam body where the coordinate detection section is located in the transverse direction of the bridge deck. In the embodiment provided in the present application, the elevation control points use coordinate detection points to realize the monitoring of the elevation points of the bridge jacking process, and the control points (i.e., coordinate detection points) are distributed on both sides and the middle of the coordinate detection sections on the bridge piers and the beam body 1 in each span, that is, the coordinate detection points 2 are set on both sides and the middle of the coordinate detection sections on the bridge piers and each span, that is, two coordinate detection points 2 are respectively located at the two ends of the boundary line, and one coordinate detection point 2 is located in the middle of the boundary line; it is convenient to detect the changes in the jacking height on both sides and the middle of the coordinate detection section, so as to determine the stress and jacking height change values ​​of the beam body 1, ensure that the changes on the lateral sides and the middle of the bridge are within the control range, so as to ensure that the changes in the bridge deck line shape during the jacking process are within the control range, and provide a basis for the overall change of the line shape during the bridge jacking process.

[0031] In the embodiments provided in the present application, in one embodiment, due to the fact that the mid-span may be twisted or the height of the two ends of the span may be inconsistent due to errors in the lifting force or lifting height on both sides during the jacking process, resulting in relatively large changes in stress and line shape in the mid-span, the stress tester is located in the mid-span of the beam. This is convenient for detecting stress changes during the jacking process of the beam, so as to control the lifting height and amplitude of the beam, and ensure that the line shape changes of the bridge are within the control range. In another embodiment, optionally, the stress tester is located at the fulcrum position of the continuous beam on the beam, so as to facilitate the detection of stress changes of the continuous beam, so as to ensure that the stress changes of the continuous beam fulcrum are within the control range, thereby ensuring the line shape of the bridge and the normal operation of the bridge after construction.

[0032] In the embodiment provided in the present application, during the lifting process, the end of each span of the beam is the lifting position. In order to ensure the height accuracy of the lifting, it is necessary to monitor the lifting height of the end of each span of the beam in real time. Figure 1As shown, a second dial gauge 50 is also included at the end of each span beam body to match the value measured by the displacement sensor 40 at the end of each span beam body. Optionally, the second dial gauge 50 is 2.5-3.5 cm away from the displacement sensor 40. Optionally, the second dial gauge 50 is 3 cm away from the displacement sensor 40, and the second dial gauge 50 is set on both sides of the displacement sensor 40 to ensure that the verified jacking height is more accurate.

[0033] In the embodiment provided in the present application, in order to ensure the accuracy of the test results of the dial gauge and to prevent the dial gauge from being affected by external factors during the test, the first and second dial gauges are optionally arranged on the cap beam at the bottom of the beam or on the supporting structure supporting the beam body, wherein the supporting structure can also be an independent bracket and is not a working table supporting the lifting beam body. Optionally, the contact surface between the first and second dial gauges and the bottom of the beam is a plane.

[0034] In the embodiment provided in the present application, a dial indicator is installed on the anti-collision wall on both sides of the beam body to observe the lateral displacement of the beam body during the jacking process. If the lateral displacement exceeds the control value, the jacking is stopped immediately and the jacking force of each jacking jack is adjusted to avoid excessive lateral displacement.

[0035] In summary, the full-bridge single-width jacking monitoring system provided by the present application has the following beneficial effects:

[0036] The whole bridge single span jacking monitoring system provided in the embodiment of the present application comprises: a first dial gauge arranged under each beam plate constituting the beam body, a coordinate detection device arranged at the midpoint of the side span and middle span beam body and on the beam body on the bridge pier, a stress tester for monitoring the stress of the beam body and a displacement sensor for monitoring the jacking displacement of the beam body; the first dial gauge is used to verify the bridge displacement measured by the displacement sensor, and the coordinate detection device is used to verify the value measured by the first dial gauge and the bridge displacement measured by the displacement sensor. In the embodiment provided by the present application, by arranging a dial gauge under each beam plate, the jacking height of each beam plate is detected to ensure the control of the jacking force and jacking height of each beam plate, thereby realizing the control of the deformation of the whole bridge; by arranging the coordinate detection device, the problem that it is inconvenient to place the dial gauge and other measuring devices on the cross slope of the beam body in each span is overcome, and the overall change of the beam body line shape is controlled at the same time, so that the jacking height of the beam body on each bridge pier has a definite basis, and the jacking height of the bridge deck can be effectively controlled.

[0037] The whole bridge single span jacking monitoring system provided by the embodiment of the present application has coordinate detection sections provided in the bridge piers and each span, and each coordinate detection section is provided with coordinate detection points of the coordinate detection device; three coordinate detection points are distributed on each coordinate detection section; two of the coordinate detection points are located on both sides of the coordinate detection section in the transverse direction of the bridge, one of the coordinate detection points is located in the middle of the coordinate detection section, and the coordinate detection points are located on the boundary of the cross section of the beam body where the coordinate detection section is located. In the embodiment provided by the present application, the elevation control points are distributed on both sides and the middle of the coordinate detection sections in the bridge piers and each span, which solves the problem that it is inconvenient to place measuring equipment such as dial indicators on the transverse slope in each span, ensures that the changes on both sides and the middle of the bridge are within the control range, ensures that the changes in the bridge deck line shape during the jacking process are within the control range, and provides a basis for the overall changes in the line shape during the bridge jacking process.

[0038] The above are only some embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A full-bridge single-width jacking monitoring system, characterized in that: include: A first dial gauge is arranged under each beam plate constituting the beam body, a coordinate detection device is arranged at the midpoint of the side span and middle span beam body and on the beam body on the pier, a stress tester for monitoring the stress of the beam body and a displacement sensor for monitoring the jacking displacement of the beam body; the first dial gauge is used to verify the bridge displacement measured by the displacement sensor, and when the absolute value of the deviation between the value of the first dial gauge and the value of the displacement sensor is greater than 2mm, the jacking operation is stopped; the coordinate detection device is used to verify the value measured by the first dial gauge and the bridge displacement; Coordinate detection sections are provided in the bridge piers and each span, and coordinate detection points of the coordinate detection device are provided on each coordinate detection section; three coordinate detection points are distributed on each coordinate detection section; two coordinate detection points are located on both sides of the coordinate detection section in the transverse direction of the bridge, one coordinate detection point is located in the middle of the coordinate detection section, and the coordinate detection points are located on the boundary of the cross section of the beam body where the coordinate detection section is located; It also includes a second dial indicator arranged at the end of each span of the beam body. The second dial indicator is arranged on opposite sides of the displacement sensor and is 2.5-3.5 cm away from the displacement sensor. It is used to monitor the jacking height of the end of each span of the beam body to ensure the height accuracy of the jacking.

2. The full-bridge single-width jacking monitoring system according to claim 1 is characterized in that: The stress tester is located in the middle of the beam span.

3. The full-bridge single-width jacking monitoring system according to claim 1 is characterized in that: The stress tester is located at the fulcrum position of the continuous beam on the beam body.

4. The full-bridge single-width jacking monitoring system according to claim 1 is characterized in that: The distance between the second dial indicator and the displacement sensor is 3 cm.

5. The full-bridge single-width jacking monitoring system according to claim 1 is characterized in that: The first and second dial indicators are arranged on the cap beam at the bottom of the beam.

6. The full-bridge single-width jacking monitoring system according to claim 1 is characterized in that: The contact surfaces between the first and second dial indicators and the bottom of the beam are planes.

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