CN209230900U - A kind of loading detection device suitable for bridge main beam - Google Patents

Abstract

The utility model discloses a load detection device suitable for a bridge main beam and a measurement method thereof, and relates to the technical field of bridge load detection devices. The utility model comprises a test pile, two auxiliary piles and a benchmark rod. The test pile, the auxiliary pile and the benchmark rod are all fixed in water. The benchmark rod is located on one side of the test pile. A reaction beam is fixedly connected to the upper surface of the auxiliary pile, and a number of loads are arranged on one surface of the reaction beam. A number of vibrating wire sensors are fixedly connected to the peripheral side of the test pile and the auxiliary pile. Wooden board platform, the utility model directly uses the temporary piers that have been vibrated as test piles and auxiliary piles, and does not need to build additional temporary components, thereby reducing construction difficulty, saving construction time, and reducing test costs. The advantages of convenient loading, fast and strong operability.

Description

A load detection device suitable for bridge main girder

technical field

The utility model relates to the technical field of bridge load detection devices, in particular to a load detection device suitable for bridge main beams.

Background technique

The temporary pier is a very important temporary member for the assembly of the steel truss girder of the Rongjiang Extra Large Bridge. In the process of erecting steel truss beams, with the gradual increase of the weight of the upper structure, the reaction force on the temporary pier is also increasing. Therefore, the temporary pier must have a certain bearing capacity to ensure the stability and stability of the steel truss beam assembly process. Safety.

For the calculation method of the vertical compressive static load test of single pile, the loading devices often used in engineering are: pressure platform reaction force device, anchor pile beam reaction force device, anchor pile pressure-weight combined reaction force device, ground anchor reaction force device. Since the temporary piers of the bridge are operated in water, if the pressure platform reaction device is used, an additional support system needs to be set up to build a huge pressure platform, which will increase the difficulty of construction and greatly increase the cost. If the anchor pile beam is used The reaction force device has higher requirements on the pull-out bearing capacity of the anchor pile. Therefore, the difficulty of construction and the high cost of construction are technical problems to be solved by those skilled in the art.

Utility model content

In view of the deficiencies of the prior art, the utility model provides a load detection device suitable for the main beam of a bridge. By directly using the engineering temporary piers that have been vibrated as test piles and auxiliary piles, the difficulty of construction and the cost of construction are solved. high question.

In order to achieve the above purpose, the present utility model is realized through the following technical solutions: a load detection device suitable for the main beam of a bridge, comprising a test pile, two auxiliary piles and a benchmark pole, and the test pile, the auxiliary pile and the benchmark pole are all fixed in water, and the benchmark pole is located on one side of the test pile;

A jack is fixedly connected to the top surface of the test pile, one end of the jack is fixedly connected to the upper surfaces of the two auxiliary piles, and a reaction beam is fixedly connected, and a surface of the reaction beam is provided with a number of load objects;

Several vibrating wire sensors are fixedly connected to the peripheral sides of the test pile and the auxiliary pile. The number of the vibrating wire sensors located on the peripheral side of the test pile is four, and the number of the vibrating wire sensors located on the peripheral side of the auxiliary pile is two;

A wooden board platform is provided on the peripheral side of the test pile and several auxiliary piles, and the wooden board platform is located above the water surface.

Further, several scales are fixedly connected to the peripheral sides of the test pile and several auxiliary piles, and a dial indicator is fixedly connected to one surface of the wooden board platform.

A measurement method suitable for bridge main beams includes the following steps:

SS01 calibration time;

SS02 loads the jack oil pressure parameters according to x=0.018*9.8*p-0.21, where x is the reading of the oil pressure gauge, and p is the jack pressure;

SS03 collects the load stress of the vibrating wire sensor on the side of the test pile and the load stress q of the vibrating wire sensor on the side of the auxiliary pile respectively, and the collection frequency is 30 seconds/time;

SS04 uses a precision level to observe the readings of the scales on the test piles and auxiliary piles, and obtains the settlement displacement m of the test piles and auxiliary piles, which is recorded every 30 seconds;

SS05 uses the displacement difference between the dial indicator and the benchmark to record the settlement displacement n of the plank platform;

SS06 Gradually increase the number of load objects, that is, increase the load weight of the reaction beam, repeat the above steps, take the average value of p and q at each time point, and take the average value of m and n at each time point, and draw and tabulate.

Further, the data obtained by the vibrating wire sensor is automatically collected by DATATAKER.

Further, the load object is I-beam.

The utility model has the following beneficial effects:

1. The load detection device and its calculation method suitable for the main beam of the bridge directly use the engineering piles that have been vibrated as the test piles and auxiliary piles, without the need to erect additional temporary components, thereby reducing the difficulty of construction and saving construction time. And greatly reduce the test cost.

2. The load detection device and its measurement method suitable for bridge main beams carry out graded tests by changing the number of loads. Compared with the existing test methods, it has the advantages of convenient loading, fast loading and strong operability.

3. The load detection device and its measurement method suitable for the main beam of the bridge collect the data of the load and the settlement displacement in various ways, and draw the chart by taking the average value, which effectively avoids the errors generated in the test and improves the test data. The reference value is helpful for measuring the load of the bridge.

Of course, any product implementing the present invention does not necessarily need to simultaneously achieve all of the above-mentioned advantages.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of a load detection device suitable for a bridge girder of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of Fig. 1;

Fig. 3 is the flow chart of the measurement method of a kind of bridge main beam of the present utility model;

Figure 4 is a line chart of test data;

In the accompanying drawings, the list of components represented by each number is as follows:

In the picture: 1- Test pile, 2- Auxiliary pile, 3- Reaction beam, 4- Load object, 5- Wooden platform, 6- Vibrating wire sensor, 7- Ruler, 8- Jack, 9- Dial indicator, 10 - Benchmarking.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to Figures 1-2, the present utility model provides a technical solution: a load detection device suitable for bridge main beams, comprising a test pile 1, two auxiliary piles 2 and a benchmark 10, a test pile 1, an auxiliary pile 2 Both the benchmark pole 10 and the benchmark pole 10 are fixed in the water, the benchmark pole 10 is located on one side of the test pile 1, and the auxiliary pile 2 provides the anti-pulling reaction force;

A jack 8 is fixedly connected to the top surface of the test pile 1, and one end of the jack 8 is fixedly connected to the upper surfaces of the two auxiliary piles 2 with a reaction beam 3, and a surface of the reaction beam 3 is placed with a number of loads 4; quantity to change the load weight of reaction beam 3;

Several TRC-HB-01A vibrating wire sensors 6 are fixedly connected to the side surfaces of the test pile 1 and the auxiliary pile. The number of sides of the pile 2 weeks is two;

A wooden board platform 5 is built on the side of the test pile 1 and several auxiliary piles, and the wooden board platform 5 is located above the water surface.

Among them, several scales 7 are fixedly connected to the side surfaces of the test pile 1 and several auxiliary piles, and a dial indicator 9 is fixedly connected to one surface of the board platform 5.

As shown in Figure 3, it includes the following steps:

SS01 calibration time to ensure that observation and graded loading of loads can be carried out at the same time;

SS02 loads the oil pressure parameters of the jack 8 in stages according to x=0.018*9.8*p-0.21, where x is the reading of the oil pressure gauge, and p is the pressure of the jack;

SS03 collects the load stress of the vibrating wire sensor 6 on the side of the test pile 1 and the load stress q of the vibrating wire sensor 6 on the side of the auxiliary pile on the 2nd circumference. The collection frequency is 30 seconds/time; the vibrating wire sensor 6 is convenient to increase the load Quantitative detection accuracy;

SS04 uses a precision level to observe the readings of the scale 7 on the test pile 1 and the auxiliary pile 2, and obtains the settlement displacement m of the test pile 1 and the auxiliary pile 2, and records it every 30 seconds;

SS05 records the settlement displacement n of the plank platform 5 by using the displacement difference generated by the dial indicator 9 and the benchmark 10; the dial indicator 9 is beneficial to improve the detection accuracy of the settlement displacement;

SS06 Gradually increase the number of load objects 4, that is, increase the load weight of reaction beam 3, repeat the above steps, take the average value of p and q at each time point, and take the average value of m and n at each time point, and draw a chart.

The table data is as follows:

Among them, Fig. 4 is a line graph of the obtained data; it can be seen from Fig. 4 that the symmetry of the test pile 1 in the loading stage and the unloading stage is good, and the two stages are almost in a straight line, which shows that when the test pile is loaded to 200t, the test pile 1 is in the elastic working stage, and the vertical displacement mainly comes from elastic deformation. It should be noted that the maximum residual displacement is 0.30mm, and the residual displacement mainly comes from the temperature change, which further shows that the test pile 1 basically did not settle and can meet the 200t bearing requirement. .

Among them, the data obtained by the vibrating wire sensor 6 is automatically collected by DATATAKER.

Among them, the load 4 is an I-beam.

In the description of this specification, description with reference to the terms "one embodiment", "example", "specific example", etc. means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in the present invention. in at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details, nor do they limit the invention to only the described embodiments. Obviously, many modifications and variations are possible in light of the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (2)

1. a load detection device suitable for bridge main beam, is characterized in that: Including a test pile (1), two auxiliary piles (2) and a benchmark (10); The test pile (1), the auxiliary pile (2) and the benchmark (10) are all fixed in the water, and the benchmark (10) is located on one side of the test pile (1); A jack (8) is fixedly connected to the top surface of the test pile (1), one end of the jack (8) is fixedly connected to the upper surfaces of the two auxiliary piles (2), and a reaction beam (3) is fixedly connected. (3) A number of load objects (4) are arranged on one surface; A plurality of vibrating wire sensors (6) are fixedly connected to the peripheral sides of the test pile (1) and the auxiliary pile (2), and the number of the vibrating wire sensors (6) located on the peripheral side of the test pile (1) is four , the number of the vibrating wire sensors (6) located on the peripheral side of the auxiliary pile (2) is two; A wooden board platform (5) is provided on the peripheral side of the test pile (1) and several auxiliary piles (2), and the wooden board platform (5) is located above the water surface. 2. A load detection device suitable for a bridge main beam according to claim 1, characterized in that, a plurality of scales (7) are fixedly connected to the peripheral sides of the test pile (1) and a plurality of auxiliary piles (2). , a dial indicator (9) is fixedly connected to one surface of the wooden board platform (5).