CN210533641U

CN210533641U - Bridge deflection measuring device

Info

Publication number: CN210533641U
Application number: CN201921524783.8U
Authority: CN
Inventors: 王旭光
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-15
Filing date: 2019-09-15
Publication date: 2020-05-15
Anticipated expiration: 2029-09-15

Abstract

The utility model provides a bridge amount of deflection measuring device based on lever principle, relates to bridge amount of deflection detection technical field, including girder, girder strutting arrangement, extension beam, table frame strutting arrangement, displacement meter, data acquisition system, girder strutting arrangement and table frame strutting arrangement lay outside the bridge span that awaits measuring, install deflectometer and data acquisition system, can conveniently survey each measurement station deflection value of bridge span fast, but wide application in bridge amount of deflection measurement.

Description

Bridge deflection measuring device

Technical Field

The utility model relates to a bridge amount of deflection detects technical field, especially relates to a bridge amount of deflection measuring device based on lever principle.

Background

The deflection measurement of the bridge is an important component of bridge detection, is an important parameter for evaluating the bearing capacity of the bridge, and needs to accurately measure the deflection value of the bridge in the aspects of old bridge detection, dangerous bridge reconstruction, new bridge completion acceptance and the like, and deflection data plays an important role in evaluating the structural condition of the bridge.

The existing bridge deflection measuring method mainly comprises the following (1) methods of erecting a bracket under a bridge by a dial indicator [1 ]: and a fixed support is erected under the bridge, the support and the main beam are kept in an independent state, the dial indicator is fixed at the top of the support, and a measuring pin of the dial indicator is in close contact with the bottom surface of the main beam. The method is only suitable for the condition that the clearance between the beam bottom and the ground is less than 6m, the navigation is not performed under the bridge, the erection and disassembly time of the bracket is long, the cost is high, and the reading is slow; (2) suspension-hammer method [2 ]: the method comprises the steps that measuring points are arranged on a beam bottom test section and connected with a plumb through steel wires, a dial indicator is arranged above a pointer of the dial indicator below the plumb, the dial indicator is fixed on an indicator frame, and the indicator frame is fixed on a riverbed or a bottom surface; (3) total station method [3 ]: the basic principle of total station deflection measurement is triangulation height measurement. The method for measuring the height difference between two points by measuring the horizontal distance and the vertical angle between the two points by the triangulation height measurement. The method can not ensure the measuring range and the precision of the deflection under severe weather conditions or when obstacles exist; (4) inclinometer method [4 ]: firstly, measuring the inclination angles of a plurality of sections when the bridge is deformed by using an inclinometer, fitting an inclination angle curve according to the inclination angles, further obtaining a deflection curve, and solving the deflection value of a measuring point on the bridge. The method needs to arrange a plurality of high-precision inclinometers on the bridge, is difficult to implement engineering, and is difficult to obtain a result with higher precision when the inclination angle of the bridge is smaller; (5) communication piping method [5 ]: the change of the deflection of the bridge is obtained according to the change of the liquid level in the communication pipes arranged at each position of the bridge by utilizing the principle of the communication pipes. When the bridge body is deformed, the water pipes fixed on the bridge body move along with the bridge body, at the moment, the liquid level in each vertical water pipe is kept at the same horizontal plane with the liquid level at the reference point, but the liquid level of each vertical water pipe at each measuring point is subjected to relative movement with different sizes, and the measured relative displacement is the deflection value of the measured point.

Disclosure of Invention

The utility model discloses a bridge amount of deflection measuring device is not enough among the solution prior art, the utility model is simple in operation convenient, can not only conveniently lay fast, can realize quick, the accurate collection to the measurement station amount of deflection moreover.

In order to achieve the above object, the present invention provides the following technical solutions:

a bridge deflection measuring device is arranged on a bridge span to be detected and comprises a main beam, a main beam supporting device, an elongated beam, a gauge stand supporting device, a displacement meter and a data acquisition system, wherein the main beam supporting device is arranged on the outer side of the bridge span to be detected and consists of a supporting base, a leveling bolt, a horizontal bubble instrument, a supporting upright post and a rotating shaft, the main beam is connected with the main beam supporting device through the rotating shaft, the number of the elongated beams is selected according to the length of the bridge span by the main beam, the main beam is in bolt connection with the elongated beam, the elongated beam is in bolt connection with a front gauge plate, a front gauge plate measuring rod is in contact with a bridge floor of a bridge span section to be detected, the gauge stand supporting device is arranged on the outer side of the bridge span to be detected and consists of a gauge stand base, a leveling bolt, a horizontal bubble instrument, a gauge stand upright rod, a fastening bolt and a deflection meter, and the deflection meter is connected with a main beam, the deflectometer is arranged on the meter frame supporting device during testing, is fixedly connected through the fastening bolt, is in contact with the rear measuring rod of the main beam and is ensured to be in a vertical state, the distance between the deflectometer and the rear measuring rod is adjusted according to the requirement of pre-estimated deflection, the testing is ensured to be always in close contact, the deflectometer is connected with the acquisition system through the wireless data transceiver, and the deflection value of the main beam of the bridge before and after being loaded can be quickly measured through the data acquisition system.

The main beam supports the base and the table frame supports the base top surface and sets up the horizontal bubble appearance, supports the base and all is equipped with three adjustable bolt, through the regulation of three bolt, can make the interior bubble of horizontal bubble appearance placed in the middle, guarantees that the base is in the horizontality, can guarantee that the base keeps the horizontality under the relatively poor condition of contact surface form.

The bridge is characterized in that the main beam and the lengthened beam are made of aluminum alloy materials and provided with lengthened connecting plates, bolt holes are formed in the lengthened connecting plates, the lengthened beams and the front measuring plate are connected with the main beam through the bolt holes, the number of the lengthened beams can be selected according to bridge span, the lengthened beams are connected through bolts, and detection requirements of bridges with different spans and convenient transportation are met.

Specifically, the meter frame connecting device is made of metal and comprises a meter frame base, a leveling bolt, a horizontal bubble instrument, a meter frame upright rod, a meter frame cross rod, a fastening bolt and a deflectometer, wherein the deflectometer penetrates through a reserved hole of the meter frame cross rod and is fixed through the fastening bolt, and a probe of the deflectometer is in contact with a rear measuring rod of the main beam and ensures that the rear measuring rod is in a vertical state.

Specifically, the main beam supporting device is supported by a metal material and consists of a supporting base, a leveling bolt, a horizontal bubble instrument, a supporting upright post and a rotating shaft, and the main beam supporting device is connected with the main beam through the rotating shaft and ensures that the main beam is in a vertical state and can rotate freely after being connected.

The measuring method comprises the following steps:

1) and resetting the deflectometer after the instrument is installed, and measuring the center distance L1 between the center of the front measuring rod and the center of the rotating shaft and the center distance L2 between the center of the rotating shaft and the center of the rear measuring rod.

2) A load was applied to the test span and a deflectometer reading W2 was taken.

3) The girder can rotate around the rotating shaft along with the vertical deformation of the bridge span by means of the dead weight, and the deflection value is calculated according to the lever principle when the bridge span measuring point is loaded:

1

（1）。

4) and (3) reading the deflectometer reading W2 after the load is unloaded in the test span, and obtaining the residual deflectometer of the unloaded bridge span according to the step 3).

The utility model discloses extension beam quantity can set up according to actual need, and the deflectometer passes through wireless transceiver to be connected with the data acquisition instrument, realizes the real-time quick collection of data.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses the structure principle is simple, and the on-the-spot installation and the dismantlement of being convenient for, data can gather fast and the data degree of accuracy is high. This device girder and extension roof beam are made by aluminium alloy material, light, convenient transportation and field installation, and this is used novel still to have following characteristics:

1) the girder of the device can be lengthened through the lengthened beam, the girder is connected with the lengthened beam through the bolt, the field connection is convenient, and the device is suitable for various bridges with different spans.

2) The device is low in height and less influenced by a loading vehicle beam on a bridge deck, the front measuring rod is arranged below the loading vehicle for measurement, multiple channels can be arranged in the transverse bridge direction, the problem that the upper structure is a structure formed by multiple beams, such as a hollow plate beam or a T beam can be solved, and the deflection of each beam can be measured.

3) The device has the advantages of low cost, simple and understandable principle and convenient popularization and application.

To sum up the utility model discloses device simple understandable of structural principle, reliability height, installation and transportation convenience, longe-lived, can measure different span bridge amount of deflection, and data accuracy is high, can realize real-time collection, receives external influence little, can improve work efficiency greatly, consequently the utility model discloses the device has popularization and application value, also can produce huge social.

Drawings

FIG. 1 is a field installation diagram of the present invention;

FIG. 2 is a measurement state diagram of the present invention;

FIG. 3 is a main beam view of the present invention;

fig. 4 is a side view of the main beam support apparatus of the present invention;

fig. 5 is a top view of the main beam supporting device of the present invention;

fig. 6 is a view of the elongated beam of the present invention;

FIG. 7 is a front panel view of the present invention;

FIG. 8 is a side view of the watch frame attachment of the present invention;

fig. 9 is a plan view of the watch holder connection device of the present invention.

Detailed Description

The present invention will be further described with reference to specific embodiments, illustrative embodiments and description of the invention are provided herein to explain the present invention, but not to limit the present invention.

The device for measuring the bridge deflection as shown in figures 1 and 2 is arranged on a bridge span 18 to be detected, a bridge abutment (pier) 19 is arranged below the bridge span to be detected, the deflection measuring device comprises a main beam 1, a main beam supporting device, an elongated beam 2, a meter frame supporting device, a displacement meter 17 and a data acquisition system, the main beam supporting device is arranged on the outer side of the bridge span 18 to be detected, the main beam supporting device consists of a supporting base 10, a leveling bolt 9, a horizontal bubble instrument 16, a supporting upright post 8 and a rotating shaft 7, the main beam 1 is connected with the main beam supporting device through the rotating shaft 7, the number of the elongated beams 2 is selected by the main beam 1 according to the length of the bridge span, the main beam 1 is bolted with the elongated beam 2, the elongated beam 2 is bolted with a front measuring plate 4, a front side plate measuring rod 5 is in contact with the bridge span 18 to be detected, the meter frame supporting device is arranged on the outer side of the bridge span 18 to be detected, and the meter, The device comprises a horizontal bubble instrument 16, a meter frame upright rod 13, a meter frame cross rod 12, a fastening bolt 15 and a deflectometer 17, wherein the deflectometer 17 is connected with a main beam 1 rear measuring rod 11 through a meter frame supporting device, the deflectometer 1 is installed on the meter frame supporting device during testing and is fixedly connected through the fastening bolt 15, so that the deflectometer is in contact with the main beam 1 rear measuring rod 11 and is ensured to be in a vertical state, the distance between the deflectometer 17 and the rear measuring rod 11 is adjusted according to the estimated deflection requirement, the test is ensured to be always in close contact, the deflectometer 17 is connected with an acquisition system through a wireless data transceiver, and then data acquisition is carried out. The data acquisition system 20 can be used to quickly measure the deflection of the bridge span 18 before and after loading.

The girder supports base and table frame and supports base top surface and set up horizontal bubble appearance 16, supports the base and all is equipped with three adjustable bolt 9, and through the regulation of three bolt 9, can make 16 interior bubbles of horizontal bubble appearance placed in the middle of, guarantees that the base is in the horizontality, can guarantee that the base keeps the horizontality under the relatively poor condition of contact surface form.

Girder 1 and extension roof beam 2 make by aluminum alloy material and be equipped with extension connecting plate 3, be equipped with bolt hole 6 on the extension connecting plate 3, extension roof beam 2 and preceding survey board 4 pass through bolt hole 6 and girder 1 bolted connection, can select extension roof beam 2 quantity according to 18 strides footpaths of bridge girder, adopt bolted connection between the extension roof beam 2, satisfy the detection demand of different bridges of striding and convenient transportation.

The meter frame connecting device is made of metal and comprises a meter frame base 14, a leveling bolt 9, a horizontal bubble instrument 16, a meter frame upright rod 13, a meter frame cross rod 12, a fastening bolt 15 and a deflectometer 17, wherein the deflectometer 17 penetrates through a reserved hole of the meter frame cross rod 12 and is fixed through the fastening bolt 15, and a probe of the deflectometer 17 is in contact with a rear main beam measuring rod 11 and is ensured to be in a vertical state.

The main beam supporting device is supported by a metal material and consists of a supporting base 10, a leveling bolt 9, a horizontal bubble instrument 16, a supporting upright post 8 and a rotating shaft 7, and the main beam supporting device is connected with the main beam 1 through the rotating shaft 7, so that the main beam 1 is ensured to be in a vertical state and can rotate freely after being connected.

The measuring method comprises the following steps:

1) after the instrument is installed, the deflectometer 17 is cleared, and the distance L1 between the center of the front measuring rod 5 and the center of the rotating shaft 7 and the distance L2 between the center of the rotating shaft 7 and the center of the rear measuring rod 11 are measured.

2) A load is applied to test bridge 18 and a deflectometer 11 reading W2 is taken.

3) The main beam 1 can rotate around the rotating shaft 7 along with the vertical deformation of the bridge span main beam 18 by means of self weight, and the deflection value of the bridge span 18 when a measuring point is loaded is calculated according to the formula (1).

4) Unloading the load at the test bridge span 18, reading the reading W2 of the deflectometer 11, and obtaining the residual deflexion value of the bridge span 18 after unloading according to the step 3).

The above description is directed to the present invention and its embodiments, the technical solution of the present invention is not limited to the above specific implementation, and all the modifications made by the contents of the specification and the drawings of the present invention, or the direct or indirect application in the related technical field, should be included in the scope of the present invention.

Claims

1. A bridge deflection measuring device is characterized by comprising a main beam, a main beam supporting device, an elongated beam, a gauge support device, a displacement meter and a data acquisition system, wherein the main beam supporting device is arranged on the outer side of a bridge span to be tested and consists of a supporting base, a leveling bolt, a horizontal bubble instrument, a supporting upright post and a rotating shaft, the main beam is connected with the main beam supporting device through the rotating shaft, the number of the elongated beams is selected according to the length of the bridge span by the main beam, the main beam is bolted with the elongated beam, the elongated beam is bolted with a front measuring plate, a measuring rod of the front side plate is contacted with a cross section of the bridge span to be tested, the gauge support device is arranged on the outer side of the bridge span to be tested and consists of a gauge base, a leveling bolt, a horizontal bubble instrument, a gauge upright rod, a gauge cross rod, a fastening bolt and a deflection meter, the deflection meter is connected with the main beam rear measuring rod through the gauge support device, and the deflection meter is arranged on the, the bending meter is fixedly connected with the rear measuring rod of the main beam through a fastening bolt, the bending meter is enabled to be in contact with the rear measuring rod of the main beam and is guaranteed to be in a vertical state, the distance between the bending meter and the rear measuring rod is adjusted according to the estimated deflection requirement, the bending meter is guaranteed to be in close contact with a data acquisition system all the time during testing, and the bending meter is connected with the data acquisition system through a wireless receiving and.

2. The bridge deflection measuring device according to claim 1, wherein the top surfaces of the main beam supporting base and the meter stand supporting base are provided with horizontal bubble meters, the supporting bases are provided with three adjustable bolts, the three bolts are adjusted to center the bubbles in the horizontal bubble meters, so that the bases are ensured to be in a horizontal state, and the bases are ensured to be in a horizontal state under the condition of poor contact surface.

3. The bridge deflection measuring device according to claim 1, wherein the main beam and the extension beam are made of aluminum alloy material and are provided with extension connecting plates, the extension connecting plates are provided with bolt holes, the extension beam and the front measuring plate are connected with the main beam through the bolt holes, the number of the extension beams can be selected according to bridge span, the extension beams are connected through bolts, and therefore detection requirements of bridges with different spans are met and transportation is facilitated.

4. The bridge deflection measuring device according to claim 1, wherein the gauge stand connecting device is made of steel, the gauge stand connecting device is composed of a gauge stand base, a leveling bolt, a horizontal bubble instrument, a gauge stand upright rod, a gauge stand cross rod, a fastening bolt and a deflectometer, the deflectometer penetrates through a gauge stand cross rod reserved hole and is fixed through the fastening bolt, and a deflectometer probe is in contact with a main beam rear measuring rod and is ensured to be in a vertical state.

5. The bridge deflection measuring device of claim 1, wherein the main beam support device is made of steel, the main beam support device is composed of a support base, a leveling bolt, a horizontal bubble instrument, a support upright post and a rotating shaft, and the main beam support device is connected with the main beam through the rotating shaft, so that the main beam is in a vertical state and can rotate freely after being connected.