CN216049817U - Device for measuring height of main truss of steel box arch bridge - Google Patents
Device for measuring height of main truss of steel box arch bridge Download PDFInfo
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- CN216049817U CN216049817U CN202122314501.5U CN202122314501U CN216049817U CN 216049817 U CN216049817 U CN 216049817U CN 202122314501 U CN202122314501 U CN 202122314501U CN 216049817 U CN216049817 U CN 216049817U
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Abstract
The utility model relates to a measuring device for the elevation of a main truss of a steel box arch bridge, which relates to the technical field of bridge engineering measurement construction and comprises a rubber pipe and two measuring components, wherein the two measuring components are respectively arranged on two chords to be hoisted and connected through the rubber pipe, the measuring components comprise a centering component, a prism component, a moving component and a measuring cylinder component, the liquid level in the measuring cylinder component at the upstream side and a pointer are positioned on the same horizontal line only by adjusting the position of the moving component at the upstream side, the height difference between the two chords to be hoisted can be obtained by directly reading the height difference between the liquid level in the measuring cylinder component at the downstream side and the pointer at the downstream side, a first measuring instrument for the chords to be hoisted at the downstream side is measured by the prism component at the downstream side based on the method of differential elevation, then the second elevation of the chords to be hoisted at the upstream side is calculated according to the height difference and the first elevation, and the accuracy and precision of the elevation measurement of the main truss of the steel box arch bridge are effectively improved, the method avoids errors caused by two-time station setting and overlarge vertical angle in the traditional method.
Description
Technical Field
The application relates to the technical field of bridge engineering measurement construction, in particular to a device for measuring the elevation of a main truss of a steel box arch bridge.
Background
The steel box truss arch bridge is not only suitable for mountainous areas, valleys and complex terrains such as river crossing, canyon crossing and the like, but also suitable for luxurious urban areas such as river crossing bridges and the like, and has attractive appearance, so the steel box truss arch bridge is widely applied to bridge construction. The steel box truss arch bridge can be erected by splicing single chord members of a cantilever, can also be hoisted by sections or internode single pieces, and can also be hoisted by the whole section if the navigation condition is met. However, no matter what method is adopted to erect the steel box truss arch bridge, the linear change of the steel box truss arch bridge needs to be monitored so as to ensure the structural quality and the safety of the bridge, and the elevation measurement is one of the key links of the monitoring of the linear change.
In the related technology, the elevation measurement of the main arch in the air is usually realized by adopting a distance measurement triangle elevation method and a one-way triangle elevation method, and in a stable concrete bridge, the elevation measurement of the main arch can be realized by an opposite triangle elevation measurement method and a leveling method.
However, in the cantilever erection of the large-span steel arch bridge, the most front end of the large-span steel arch bridge is the most unstable structure, so that the height difference is very large, and the traditional triangular elevation method has the defects of large data fluctuation and poor stability, so that the problems of large measurement error and low precision exist if the traditional triangular elevation method is adopted for the elevation measurement of the main arch of the steel truss arch; in the linear monitoring of the main arch of the steel truss arch, the requirement on the height difference of two truss sheets is very high, namely the height difference cannot be more than 3 centimeters, but when the traditional triangular elevation method is adopted for carrying out the height measurement of the truss sheets on two sides of the main arch, the measuring instrument needs to be erected at different positions twice, so that a station setting error exists, the measurement error can be further increased due to the fact that the vertical angle of the arch top is too large, the height measurement of the main arch has the problems of large error and low precision, and for the installation of the cantilever structure, if the measurement precision of the main arch cannot meet the requirement, the linear deviation of the main arch is easily caused, and further the installation error which cannot be adjusted is caused.
Disclosure of Invention
The embodiment of the application provides a measuring device of steel box arch bridge owner purlin elevation to solve the problem that the elevation measurement error that exists among the correlation technique is big, the precision is low.
In a first aspect, a device for measuring the elevation of a main girder of a steel box arch bridge is provided, which comprises: the two measuring assemblies are respectively used for being arranged on two chords to be hoisted and connected through the rubber pipe;
the measurement assembly includes:
one side of the centering piece is fixed on a characteristic point of the chord to be hoisted, the other side of the centering piece is provided with a pointer, and the centering piece is provided with a first counter bore;
the prism piece is fixed on the centering piece;
the moving piece is fixed on the chord to be hoisted in a sliding mode and located below the centering piece, and a second counter bore is formed in the moving piece;
the measuring cylinder part is used for containing liquid, a scale mark is arranged on the measuring cylinder part, one end of the measuring cylinder part vertically penetrates through the first counter bore and then is connected with the moving part, and the measuring cylinder part can move up and down in the first counter bore;
one end of the rubber tube penetrates through the second counter bore and then is connected with the measuring cylinder piece, and the rubber tube is used for allowing liquid in the measuring cylinder piece to flow.
In some embodiments, the center of the prism piece, the pointer and the feature point of the chord to be hoisted are located on the same horizontal line.
In some embodiments, the centering member is detachably fixed on the characteristic point of the chord to be hoisted.
In some embodiments, the measuring assembly further comprises a first magnet fixed to a feature point of the chord to be hoisted, and the centering member is magnetically attracted to the first magnet.
In some embodiments, the first magnet is provided with a centering through hole, and the diameter of the centering through hole is equal to the diameter of the punching hole on the feature point.
In some embodiments, the measuring assembly further includes a second magnet fixed to the chord member to be hoisted and located below the first magnet, and the moving member is magnetically attracted to the second magnet.
In some embodiments, a waterproof glue is arranged at the joint of the rubber tube and the measuring cylinder.
In some embodiments, the prism member is removably secured to the centering member.
In some embodiments, the prism member is a magnetic prism adapter.
In some embodiments, the centering member is further provided with a round leveling bubble.
The beneficial effect that technical scheme that this application provided brought includes: the accuracy and precision of the elevation measurement can be effectively improved.
The embodiment of the application provides a device for measuring the elevation of a main truss of a steel box arch bridge, which comprises a rubber pipe and two measuring components, wherein the two measuring components are respectively arranged on two chords to be hoisted and connected through the rubber pipe, the measuring components comprise a centering piece, a prism piece, a moving piece and a measuring cylinder piece, liquid is contained in the measuring cylinder pieces on two sides, when the position of the moving piece is adjusted, if a height difference exists between the two chords to be hoisted, the liquid in the measuring cylinder pieces on two sides can flow through the rubber pipe, so that the height difference exists between the liquid level in the measuring cylinder piece and a pointer, the height difference represents the absolute height difference between the two chords to be hoisted, the absolute height difference is not influenced by the size of a vertical angle, therefore, the height difference between the liquid level in the measuring cylinder piece on one side and the pointer can be known by directly reading the height difference between the liquid level in the measuring cylinder piece on the downstream side and the chord piece to be hoisted on the side by adjusting the position of the moving piece on the upstream side, and based on a differential elevation method, the measuring instrument measures the first elevation of the chord member to be hoisted on the downstream side towards the prism member on the downstream side, and then calculates the second elevation of the chord member to be hoisted on the upstream side according to the elevation difference and the first elevation, so that the accuracy and precision of the elevation measurement of the main truss of the steel box arch bridge are effectively improved, and errors caused by twice station setting and overlarge vertical angle in the traditional method are avoided. Therefore, the accuracy and precision of the elevation measurement can be effectively improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a device for measuring elevation of a main girder of a steel box arch bridge according to an embodiment of the present disclosure;
fig. 2 is a schematic connection diagram of a measuring device and a chord to be hoisted provided by the embodiment of the present application;
FIG. 3 is a schematic structural diagram of a measurement assembly according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of a centering member provided in an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a moving element according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of a prism element according to an embodiment of the present disclosure;
fig. 7 is a schematic flow chart of a method for measuring a main girder elevation of a steel box arch bridge according to an embodiment of the present application.
In the figure: 1-measuring component, 11-centering component, 111-pointer, 112-first counter bore, 113-circular leveling bubble, 114-third magnet, 12-prism component, 121-supporting frame, 122-prism mounting component, 123-prism, 13-moving component, 131-second counter bore, 14-measuring cylinder component, 141-scale mark, 142-measuring cylinder body, 143-measuring cylinder plug, 15-first magnet, 16-second magnet, 2-rubber tube, 3-chord to be hoisted, and 31-characteristic point.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The embodiment of the application provides a measuring device for the elevation of a main truss of a steel box arch bridge, and aims to solve the problems of large elevation measurement error and low accuracy in the related technology.
Fig. 1 is a schematic structural diagram of a device for measuring a main girder elevation of a steel box arch bridge according to an embodiment of the present application, which includes a rubber pipe 2 and two measuring assemblies 1, as shown in fig. 2, the two measuring assemblies 1 are respectively arranged on two chords 3 to be hoisted, the two chords 3 to be hoisted are respectively located at an upstream side and a downstream side, and the two measuring assemblies 1 are connected through the rubber pipe 2; referring to fig. 3, the measuring assembly 1 includes a centering member 11, a prism member 12, a moving member 13 and a measuring cylinder member 14, one side of the centering member 11 is fixed on a characteristic point 31 of a chord member 3 to be hoisted, and the other side is provided with a pointer 111, wherein the characteristic point 31 is located at the side of a ring opening or a node of the chord member 3 to be hoisted, referring to fig. 4, the centering member 11 is provided with a first counter bore 112, and the diameter of the first counter bore 112 is matched with the diameter of the measuring cylinder member 14, so that the measuring cylinder member 14 can be conveniently inserted and moved up and down; the prism piece 12 is fixed on the centering piece 11, wherein the center of the prism piece 12, the pointer 111 and the feature point of the chord 3 to be hoisted are located on the same horizontal line, which can further ensure the accuracy of elevation measurement;
the moving member 13 is fixed on the chord 3 to be hoisted in a sliding manner and is located below the centering member 11, as shown in fig. 5, the moving member 13 is provided with a second counter bore 131, the aperture of the second counter bore 131 is slightly larger than the diameter of the rubber tube 2, so that the rubber tube 2 can conveniently slide in the second counter bore 131, and when the rubber tube 2 swings due to wind blowing, a swinging space is provided for the rubber tube 2, frequent friction between the rubber tube 2 and the moving member 13 is avoided, and the rubber tube 2 is effectively prevented from being damaged;
the measuring cylinder part 14 is used for containing liquid, and is preferably made of transparent material, so that a measurer can conveniently check the position of the liquid in the measuring cylinder part 14, a scale mark 141 is arranged on the measuring cylinder part 14, the scale mark 141 is a length measuring unit, the measuring cylinder part 14 comprises a measuring cylinder body 142 and a measuring cylinder plug 143, one end of the measuring cylinder body 142 vertically penetrates through the first counter bore 112 and then is fixedly connected with one end of the measuring cylinder plug 143, the other end of the measuring cylinder plug 143 is clamped on the moving part 13, and the measuring cylinder part 14 can move up and down in the first counter bore 112; wherein, 2 one end of rubber tube passes in proper order stretch into graduated flask body 142 behind second counter bore 131, graduated flask stopper 143, and with graduated flask stopper 143 fixed connection, just rubber tube 2 with the junction of graduated flask stopper 143 is equipped with waterproof glue, prevents to appear the problem of leaking, has improved measuring device's leakproofness, and then has guaranteed measuring precision, rubber tube 2 is used for supplying the liquid in the graduated flask spare 14 flows.
Since the measuring cylinder parts 14 on both sides contain liquid, when the position of the moving part 13 is adjusted, if a height difference exists between the two chords 3 to be hoisted, the liquid in the measuring cylinder parts 14 on both sides flows through the rubber tube 2, so that a height difference appears between the liquid level in the measuring cylinder parts 14 and the pointer 111, and the height difference represents an absolute height difference between the two chords 3 to be hoisted and is not influenced by the size of a vertical angle, therefore, the height difference between the two chords 3 to be hoisted can be obtained by directly reading the height difference between the liquid level in the downstream side measuring cylinder part 14 and the pointer 111 only by adjusting the position of the upstream side moving part 13 so that the liquid level in the side measuring cylinder parts 14 and the pointer 111 are positioned on the same horizontal line, and the first elevation of the chord 3 to be hoisted on the downstream side of the prism part 12 can be measured by the measuring instrument based on a differential elevation method, and then the second elevation of the chord 3 to be hoisted on the upstream side can be calculated according to the height difference and the first elevation, the accuracy and precision of height measurement of the main girder of the steel box arch bridge are effectively improved, and errors caused by twice station setting and overlarge vertical angle in the traditional method are avoided. Therefore, the accuracy and precision of the elevation measurement can be effectively improved.
Furthermore, in this application embodiment, can dismantle to centering piece 11 and be fixed in treat hoisting chord member 3 on the characteristic point 31, preferably, measuring component 1 still includes first magnet 15, first magnet 15 is fixed in treat hoisting chord member 3 on the characteristic point 31, centering piece 11 magnetism can inhale in on the first magnet 15, be convenient for to centering piece 11's dismouting and position adjustment, improve measuring device's installation effectiveness. The first magnet 15 is provided with a centering through hole, the diameter of the centering through hole is equal to the diameter of the punching hole on the characteristic point 31, the centering piece 11 and the characteristic point 31 can be conveniently aligned, so that the centering piece 11 can be accurately connected to the characteristic point 31, and the characteristic point 31 is a design point for elevation positioning and is an important parameter formed by a main arch shape, so that the characteristic point 31 can be marked at a node of a chord when the chord is processed in a factory, therefore, according to the embodiment of the application, the main arch shape can be calculated according to the measured elevation of the characteristic point 31 after the centering piece 11 is accurately aligned to the characteristic point 31 just before elevation calculation, so that the accuracy of the calculated linear parameter can be higher, and the linear accuracy of the arch rib can be improved.
Furthermore, in this embodiment, the measuring assembly 1 further includes a second magnet 16, the second magnet 16 is fixed on the chord 3 to be hoisted and located below the first magnet 15, and the moving member 13 can be magnetically attracted to the second magnet 16, so as to facilitate the moving and dismounting of the moving member 13. The moving member 13 may be made of a magnetic material, and the moving member 13 may also be provided with different numbers of magnet pieces, so that the moving member 13 can be magnetically attracted to the second magnet 16.
Furthermore, in this application embodiment, the prism piece 12 can be detachably fixed to the centering piece 11, the prism piece 12 is preferably a magnetic prism adapter, the centering piece 11 is provided with a third magnet 114, the third magnet 114 and the first magnet 15 are preferably located on the same horizontal line with the pointer, and the magnetic prism adapter can be magnetically attracted to the third magnet 114, so as to facilitate the detachment and installation of the prism piece 12. As shown in fig. 6, the prism 12 (the prism 12 is a magnetic prism adapter) includes a support frame 121, a prism mounting member 122 and a prism 123, the support frame 121 includes a base disposed horizontally and two support rods disposed longitudinally and connected to the same side of the base, the two support rods are both provided with mounting holes, and the bottom of the base is detachably connected with a magnet; prism installed part 122 is equipped with the prism mounting groove including the pivot and the suit of horizontal setting in the epaxial prism frame of pivot, prism 123 is installed on the prism mounting groove, the pivot of prism installed part 122 is installed in two mounting holes, at the bridge construction overall process, prism spare 12 can arrange wantonly, do not receive the construction, the topography influence, and the consideration sight factor that can be more nimble in the design moreover, simple structure, low in manufacturing cost.
Furthermore, in this embodiment, the centering member 11 is further provided with a circular level bubble 113, which not only can ensure that the centering member 11 is in a horizontal state, but also can judge whether the measuring device is in the horizontal state through the circular level bubble when the position of the moving member 13 is adjusted, thereby ensuring the accuracy of measurement.
Referring to fig. 7, an embodiment of the present application further provides a method for measuring a height of a main girder of a steel box arch bridge, where the method for measuring a height of a main girder of a steel box arch bridge is implemented based on the apparatus for measuring a height of a main girder of a steel box arch bridge, and includes the following steps:
s1: the position of a moving piece on the chord member to be hoisted on the upstream side is adjusted in a sliding mode, so that the liquid level in the measuring cylinder member on the upstream side and the pointer on the upstream side are located on the same horizontal line;
s2: reading the height difference between the liquid level in the measuring cylinder piece on the chord member to be hoisted on the downstream side and the pointer on the downstream side, and enabling the measuring instrument to face the prism piece on the downstream side to measure the first elevation of the chord member to be hoisted on the downstream side;
s3: and calculating a second elevation of the chord to be hoisted on the upstream side according to the first elevation and the height difference.
Since the measuring cylinder parts 14 on both sides contain liquid, when the position of the moving part 13 is adjusted, if a height difference exists between the two chords 3 to be hoisted, the liquid in the measuring cylinder parts 14 on both sides flows through the rubber tube 2, so that a height difference appears between the liquid level in the measuring cylinder parts 14 and the pointer 111, and the height difference represents an absolute height difference between the two chords 3 to be hoisted and is not influenced by the size of a vertical angle, therefore, the height difference between the two chords 3 to be hoisted can be obtained by directly reading the height difference between the liquid level in the downstream side measuring cylinder part 14 and the pointer 111 only by adjusting the position of the upstream side moving part 13 so that the liquid level in the side measuring cylinder parts 14 and the pointer 111 are positioned on the same horizontal line, and the first elevation of the chord 3 to be hoisted on the downstream side of the prism part 12 can be measured by the measuring instrument based on a differential elevation method, and then the second elevation of the chord 3 to be hoisted on the upstream side can be calculated according to the height difference and the first elevation, the accuracy and precision of height measurement of the main girder of the steel box arch bridge are effectively improved, and errors caused by twice station setting and overlarge vertical angle in the traditional method are avoided. Therefore, the accuracy and precision of the elevation measurement can be effectively improved.
Specifically, before the chord 3 to be hoisted is not installed, a first magnet 15 is respectively arranged at the characteristic point 31 of the two chord 3 to be hoisted; installing two chords 3 to be hoisted, which are provided with first magnets 15, to the upstream side and the downstream side respectively according to linear parameters; one measuring assembly 1 is installed on the chord 3 to be hoisted on the upstream side, the other measuring assembly 1 is installed on the chord 3 to be hoisted on the downstream side, so that the centering pieces 11 on the two sides are respectively attracted on the first magnets 15 on the two sides in a corresponding magnetic manner, and the prism piece 12 on the downstream side faces the total station; one end of the rubber tube 2 penetrates through the second counter bore 131 of the downstream side moving part 13 and then is fixedly connected with the measuring cylinder plug 143 on the side, the rubber tube 2 is filled with liquid and is collected by a winding reel, then the other end of the rubber tube 2 is pulled from the downstream side to the upstream side by adopting an arch-type crane or an unmanned aerial vehicle, and the rubber tube 2 penetrates through the second counter bore of the upstream side moving part 13 in sequence and then is fixedly connected with the measuring cylinder plug 143 on the side, and a communicating pipe is formed; adding liquid from the tops of the measuring cylinder bodies 142 at two sides respectively until the liquid level is approximately aligned with the pointer 111, and stopping adding the liquid; the liquid level is kept still for about 10 minutes, after the liquid level is not changed, the position of the moving member 13 on the upstream side is adjusted by sliding up and down until the liquid level in the measuring cylinder body 142 on the upstream side is overlapped with the pointer 111 on the upstream side, and the sliding of the moving member 13 is stopped; reading the height difference between the liquid level in the downstream side measuring cylinder body 142 and the downstream side pointer 111 through the scale marks on the downstream side, wherein the height difference is the relative height difference of the two main arches and is recorded; and finally, adjusting the position of the chord member according to the absolute elevation obtained by measurement to enable the chord member to meet the requirement of the main arch shape.
Therefore, the first magnet 15 is installed on the characteristic point 31 before the chord member is not hoisted, after the chord member is installed, a measurer only needs to install the measuring device in the embodiment on the main arch, the elevation data deviation of the high-altitude cantilever state can be measured to be within 3mm through the measuring device, and then the linear parameters of the steel box truss arch bridge are calculated based on the elevation data deviation, so that the measuring precision is effectively improved, the measurer does not need to hold the prism by hand to measure the middle rod onto the steel box truss arch bridge, the measuring workload and the number of the measuring people are reduced, the measuring efficiency and the safety in the measuring process are improved, and the measuring cost is reduced; and the height difference of two sides of the main arch can be accurately measured at the cantilever end with large vertical height difference and long distance, so that the measurement precision is improved.
Furthermore, in the embodiment of the present application, before the measuring device is used for the first time, the leveling instrument is used for identification, the two measuring assemblies 1 are respectively adsorbed on the side surfaces of the chords at a height of 1 m from the ground, the liquid is replenished into the measuring cylinder body 142, the liquid level is approximately at the center of the scale mark, the moving member 13 is moved, the pointer 111 on the centering member 11 is aligned with the liquid level, then the leveling instrument is used for respectively measuring the height difference of the liquid levels in the two measuring cylinder bodies 142, the height difference of the prism 12 and the height difference of the pointer 111, and all the height differences are smaller than 1 mm, which is qualified, so that the measuring precision can be effectively ensured.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present application can be understood according to specific situations by those skilled in the art.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a measuring device of steel case arched bridge owner purlin elevation which characterized in that includes: the two measuring assemblies are respectively used for being arranged on two chords to be hoisted and connected through the rubber pipe;
the measurement assembly includes:
one side of the centering piece is fixed on a characteristic point of the chord to be hoisted, the other side of the centering piece is provided with a pointer, and the centering piece is provided with a first counter bore;
the prism piece is fixed on the centering piece;
the moving piece is fixed on the chord to be hoisted in a sliding mode and located below the centering piece, and a second counter bore is formed in the moving piece;
the measuring cylinder part is used for containing liquid, a scale mark is arranged on the measuring cylinder part, one end of the measuring cylinder part vertically penetrates through the first counter bore and then is connected with the moving part, and the measuring cylinder part can move up and down in the first counter bore;
one end of the rubber tube penetrates through the second counter bore and then is connected with the measuring cylinder piece, and the rubber tube is used for allowing liquid in the measuring cylinder piece to flow.
2. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 1, wherein: the center of the prism piece, the pointer and the characteristic point of the chord to be hoisted are positioned on the same horizontal line.
3. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 1, wherein: the centering piece can be detachably fixed on the characteristic points of the chord to be hoisted.
4. A device for measuring the elevation of a main girder of a steel box arch bridge according to claim 3, wherein: the measuring component further comprises a first magnet, the first magnet is fixed on the characteristic point of the chord to be hoisted, and the centering piece can be magnetically attracted on the first magnet.
5. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 4, wherein: and the first magnet is provided with a centering through hole, and the diameter of the centering through hole is equal to the diameter of the punching hole on the characteristic point.
6. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 4, wherein: the measuring assembly further comprises a second magnet, the second magnet is fixed on the chord to be hoisted and located below the first magnet, and the moving piece can be magnetically attracted to the second magnet.
7. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 1, wherein: and waterproof glue is arranged at the joint of the rubber tube and the measuring cylinder piece.
8. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 1, wherein: the prism piece is detachably fixed on the centering piece.
9. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 1, wherein: the prism piece is a magnetic prism adapter.
10. The device for measuring the elevation of the main girder of the steel box arch bridge as claimed in claim 1, wherein: and the centering piece is also provided with round level bubbles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122314501.5U CN216049817U (en) | 2021-09-23 | 2021-09-23 | Device for measuring height of main truss of steel box arch bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122314501.5U CN216049817U (en) | 2021-09-23 | 2021-09-23 | Device for measuring height of main truss of steel box arch bridge |
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| Publication Number | Publication Date |
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| CN216049817U true CN216049817U (en) | 2022-03-15 |
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| CN202122314501.5U Active CN216049817U (en) | 2021-09-23 | 2021-09-23 | Device for measuring height of main truss of steel box arch bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703759A (en) * | 2022-04-29 | 2022-07-05 | 中交二航局第四工程有限公司 | Spatial positioning method for front end part of anchor rod of suspension bridge section steel anchoring system |
-
2021
- 2021-09-23 CN CN202122314501.5U patent/CN216049817U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703759A (en) * | 2022-04-29 | 2022-07-05 | 中交二航局第四工程有限公司 | Spatial positioning method for front end part of anchor rod of suspension bridge section steel anchoring system |
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