CN103791795A - Bridge static load test displacement monitoring device - Google Patents

Abstract

The invention provides a bridge static load experiment displacement monitoring device, which includes a support frame, a magnetic meter base, a spring, a fixed steel braze, an anchor bracket and a dial gauge. The lower part is connected with the anchor steel braze, and the anchor steel braze is connected to the anchor bracket; the support frame has a support structure in the horizontal direction, and the test head of the dial indicator is connected to the bottom of the support structure; Magnetic gauge seat; the elongation direction of the spring is in the same vertical plane as the expansion bolt. The bridge static load experiment displacement monitoring device involved in the present invention provides a position for installing a magnetic meter base, and the device is easy to install, so that the deflection of the bridge control section can be measured quickly and is not restricted by the topography of the bridge bottom, which is convenient for popularization and use.

Description

Displacement Monitoring Device for Bridge Static Load Experiment

technical field

The invention relates to a bridge static load experiment displacement monitoring device, which belongs to the technical field of tunnel engineering.

Background technique

The safety of expressway bridges must be evaluated after completion acceptance and several years of service. The method of evaluation is usually the method of static load test. Bridge static load tests usually need to measure the deflection of the control interface of a single-piece beam under a standard load. The measurement of the deflection requires the use of a dial gauge. Under the bridge, it is usually difficult to find a place to fix the magnetic gauge.

Contents of the invention

The invention provides a bridge static load experiment displacement monitoring device. The monitoring device provides a position for installing a magnetic meter base. The device is easy to install, and the deflection of the bridge control section can be measured quickly and is not restricted by the topography of the bridge bottom.

In order to solve the above technical problems, the present invention provides the following technical solutions: a bridge static load test displacement monitoring device, the bottom surface of the center of the bridge girder bottom is provided with expansion bolts, and the monitoring device is connected to the expansion bolts, characterized in that the The monitoring device includes a support frame, a magnetic meter seat, a spring, a fixed steel braze, an anchor bracket and a dial indicator. The support frame is connected to the bottom of the bridge beam, the spring is connected to the bottom of the support frame, and the anchor steel braze is connected to the bottom of the spring. The anchor steel braze Connected to the anchor bracket; the support frame has a support structure in the horizontal direction, and the test head of the dial indicator is connected to the bottom of the support structure; the above the anchor steel braze is connected to the magnetic gauge base, and the dial gauge is connected to the magnetic gauge base; The elongation direction of the spring is in the same vertical plane as the expansion bolt.

Further, the support frame includes a rotating piece, a supporting piece and a supporting wing, and the rotating piece and the supporting piece are connected up and down, and the connection method is a rotational connection.

Further, the support piece is vertically connected to the support wing, and the support wing is horizontal.

Further, the bottom surface of the support wing is provided with a spherical concave surface, and the dial indicator test head is connected with the spherical concave surface.

Further, the anchoring rod has a vertical part and a horizontal part, and the horizontal part is on one side of the top end of the vertical part.

Further, the spring is connected with an anchoring steel drill through a steel wire. the

Further, the upper part of the rotating piece has a connecting hole, the connecting hole is a square hole, and a screw is arranged in the square hole. There is a nut on the top of the screw, and the nut is stuck on the rotating piece. The upper part of the screw is smooth, and the lower part has threads. The rotating piece and the screw The smooth part is a rotary connection, and the lower part of the screw is threaded to connect the support piece.

The bridge static load experiment displacement monitoring device involved in the present invention provides a position for installing a magnetic meter base, and the device is easy to install, so that the deflection of the bridge control section can be measured quickly and is not restricted by the topography of the bridge bottom, which is convenient for popularization and use.

Description of drawings

Fig. 1 is a structural diagram of a support frame and a rotating piece of the present invention;

Fig. 2 is the connection diagram of the present invention and bridge.

Explanation of reference signs

1-rotary piece; 2-support frame; 21-support piece; 22-support wing; 23-spherical concave surface; 24-connection hole; 6-spring; Table; 10-anchor bracket; 11-beam bottom of bridge; 12-expansion bolt; 13-steel wire.

Detailed ways

As shown in Figure 2, an expansion bolt 12 is provided on the bottom surface of the center of the bridge beam bottom, and the monitoring device is connected to the expansion bolt 12. Support 10 and dial indicator 9, described support frame 2 connects bridge girder bottom, the bottom of support frame connects spring 6, the bottom of spring 6 connects anchor steel braze 7, and anchor steel braze is connected to anchor bracket 10; Described bracing frame 2 It has a support structure in the horizontal direction. The support frame 2 includes a rotating piece 1, a supporting piece 21 and a supporting wing 22. The rotating piece 1 and the supporting piece 21 are connected up and down, and the connection method is a rotational connection. The supporting structure is the supporting wing 22 .

The elongation direction of the spring 6 is in the same vertical plane as the expansion bolt 12 .

The support piece 21 is vertically connected with the support wing 22, and the support wing 22 is horizontal.

The bottom surface of the support wing 22 is provided with a spherical concave surface 23, and the test head of the dial indicator 9 is connected with the spherical concave surface 23.

Anchor brazing 7 has a vertical part and a horizontal part, and the horizontal part is on one side of the top of the vertical part. When the anchoring steel drill is anchored, according to the ground conditions at the bottom of the bridge beam, when the ground anchoring condition is available, the anchoring steel drill 7 can be directly anchored on the ground. If the ground anchoring condition is not available, the anchoring bracket 10 should be used to fix the anchoring steel Brazing.

The spring 6 is connected to the anchor steel drill 7 through a steel wire 13 . the

As shown in Figure 1, the upper part of the rotating piece 1 has a connecting hole, the connecting hole is a square hole, and a screw is arranged in the square hole. There is a nut on the top of the screw, and the nut is stuck on the rotating piece 1. The upper part of the screw is smooth, and the lower part has threads. The rotating piece 1 is rotationally connected with the smooth part of the screw, and the bottom part of the screw is threaded to connect the support piece 21.

The supporting frame is a geological radar antenna holding device, the upper end of the rotating piece 1 is provided with a connecting hole, the lower end of the supporting piece 21 is provided with a supporting wing 22 and a connecting hole, and the top of the supporting wing 22 is provided with a spherical concave surface 23, the The rotating piece 1 and the supporting piece 21 are connected through a rotatable connection. When in use, fix the anchor steel braze 7 below the control section, drill holes at the bottom of the control section beam and install the expansion bolt 12, then connect the spring 6 with the connection hole 24 of the support frame 2, and then connect the spring with a shorter steel wire 13 6 and the anchoring brazing 7, then connect the expansion bolt 12 and the rotating piece 1 with a steel wire, and make the spring 6 in a tensioned state, the elongation of the spring should be greater than the deflection of the control section, and then install a magnetic force on the anchoring brazing 7 Table seat 8 is installed dial gauge at spherical concave surface 23 places, just can load then.

The specific implementation methods described in the present invention do not constitute a limitation to the scope of the application. Any modifications, equivalent replacements and improvements that can be made by professionals in the field within the spirit and principles of the present invention should be included in this application. within the scope of protection of the invention.

Claims (7)

1. a bridge static loading test displacement monitor, at the bottom of Bridge Beam, centre bottom surface is provided with expansion bolt, described monitoring device line is connected in expansion bolt, it is characterized in that, described monitoring device comprises bracing frame, magnetic stand, spring, fixing drill rod, anchor support and dial gauge, at the bottom of support frame as described above connects Bridge Beam, and the below linking springs of bracing frame, the below of spring connects anchoring drill rod, and anchoring drill rod is connected in anchor support; Support frame as described above has the supporting construction of horizontal direction, and the measuring head of dial gauge is connected in this supporting construction bottom; Described anchoring drill rod top connects magnetic stand, and dial gauge connects magnetic stand; The prolonging direction of described spring and expansion bolt are in same vertical plane.

2. according to a kind of bridge static loading test displacement monitor described in right 1, it is characterized in that, support frame as described above comprises revolving fragment, supporting pieces and supporting wing, and revolving fragment and supporting pieces are upper and lower syndeton, and the mode of connection is for being rotationally connected.

3. according to a kind of bridge static loading test displacement monitor described in right 2, it is characterized in that, described supporting pieces is connected with supporting wing is vertical, and supporting wing is in level.

4. according to a kind of bridge static loading test displacement monitor described in right 3, it is characterized in that, the bottom surface of described supporting wing is provided with spherical concave surface, and dial gauge measuring head is connected with spherical concave surface.

5. according to a kind of bridge static loading test displacement monitor described in right 1, it is characterized in that, described anchoring drill rod has vertical portion and horizontal part, the side of horizontal part in top, vertical portion.

6. according to a kind of bridge static loading test displacement monitor described in right 1, it is characterized in that, described spring connects anchoring drill rod by steel wire.

7. according to a kind of bridge static loading test displacement monitor described in right 2, it is characterized in that, described revolving fragment top has connecting hole, and connecting hole is square hole, is provided with screw in square hole, nut is arranged at screw top, nut is stuck on revolving fragment, screw upper smooth, and bottom has screw thread, the smooth place of revolving fragment and screw is for being rotationally connected, and screw bottom adopts the supporting pieces that is threaded.

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