CN203310708U - Interlayer shearing device for testing bonding characteristic of bridge bituminous concrete paving structure - Google Patents

Abstract

The utility model discloses an interlayer shearing device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structures. The first and second test molds are connected together, the third and fourth test molds are connected together, and the third test mold is connected together. , The fourth test mold is fixed on the upper surface of the working platform, the bracket is fixed on the left side of the working platform, the second jack is installed on the bracket, the bottom of the second jack is fixed on the reaction frame, the second force measuring ring Placed between the second jack and the first test mold and the second test mold; the first jack is set on the backing plate, the top of the first jack is fixed on the top of the reaction force frame, The force ring is arranged between the first jack and the backing plate, and the dial indicator is arranged on one side of the second test mold and the fourth test mold. The utility model can carry out shear tests on samples of different sizes by adjusting the distance between four symmetrical test molds, and can apply horizontal and vertical loads at the same time, completely eliminating the influence of dilatation produced during shearing.

Description

Interlayer Shearing Device for Testing Bonding Properties of Bridge Asphalt Concrete Pavement Structure

technical field

The utility model belongs to the technical field of asphalt concrete pavement structures, in particular to an interlayer shearing device for testing the interlayer bonding properties of bridge asphalt concrete pavement structures.

Background technique

In recent years, with the development of China's highway and bridge construction, bridge structures have been continuously innovated, and long-span bridges have become very common. However, with the increase in traffic volume and overloaded vehicles, early damage to bridge deck pavement has become more and more serious. The reason , is mainly caused by insufficient shear strength or bond strength of the bridge deck pavement layer, and the stability of the pavement structure layer mainly includes interlayer shear and interlayer pull. At present, there are many kinds of testing machines, shearing instruments, and pulling instruments in China to study the shear strength and bond strength of bridge deck pavement.

At present, there is no uniform specification for the shear test of asphalt concrete pavement in China, and the standard of test equipment is not uniform, and most of them are self-developed equipment according to the research needs of the subject. Most of the existing interlayer shear equipment for asphalt concrete pavement structures have dilatation during the shear process, and the loading methods of many equipment cannot simulate the actual load of the pavement well, and the loading rate and test temperature have great influence on the shearing process. The cutting test results have a great influence, and there are deviations in the test results.

Utility model content

The purpose of this utility model is to provide an interlayer shearing device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structures, aiming to solve the problem that the loading method of existing equipment cannot simulate the actual load situation of the road surface well, and the loading The speed and test temperature have a great influence on the shear test results, and there is a problem of deviation in the test results.

The utility model is achieved in this way, a kind of interlayer shear device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structure, the interlayer shear device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structure comprises: The first force measuring ring, the first jack, the second force measuring ring, the second jack, bracket, working platform, dial indicator, the first test mold, the second test mold, the third test mold, the fourth Test mold, reaction frame, backing plate;

The first test mold and the second test mold are connected together, the third test mold and the fourth test mold are respectively connected together, the third test mold and the fourth test mold are fixed on the upper surface of the working platform, and the bracket is fixed on the top of the working platform. On the left side, the second jack is installed on the bracket, the bottom of the second jack is fixed on the reaction frame, and the second force measuring ring is placed between the second jack and the first test mold and the third test mold ;

The first jack is set on the backing plate, the top of the first jack is fixed on the top of the reaction force frame, the first force measuring ring is set between the first jack and the backing plate, and the dial indicator is set on One side of the second test mold and the fourth test mold.

Further, the first test mold and the second test mold are connected together by bolts, and the third test mold and the fourth test mold are connected together by bolts.

Further, the third test mold and the fourth test mold are fixed on the upper surface of the working platform by welding.

Further, the bracket is fixed on the left side of the working platform by welding.

Further, the bottom of the second jack is welded and fixed with the reaction force frame.

Further, the top of the first jack is fixed on the top of the reaction force frame by welding.

The utility model interlayer shearing device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structures can test samples of different sizes by adjusting the distance between four symmetrical test molds, and simultaneously apply horizontal loads and vertical loads. The load can better simulate the actual force situation of the bridge deck pavement, and completely eliminate the dilatancy effect caused by shearing. During the test, the test can be conveniently performed in the controlled strain or controlled stress mode by using manual loading. In addition, the utility model is easy to operate, and can conduct interlayer shear performance experiments under various standard loads and overload conditions according to requirements.

Description of drawings

Fig. 1 is the structural representation of the interlayer shearing device of the interlayer shearing device of testing bridge asphalt concrete pavement structure interlayer bonding characteristic that the utility model embodiment provides;

In the figure: 1. The first force-measuring ring; 2. The first jack; 3. The second force-measuring ring; 4. The second jack; 5. Support; 6. Working platform; 7. Dial indicator; 8. The first test mold; 9. The second test mold; 10. The third test mold; 11. The fourth test mold; 12. The reaction force frame; 13. The backing plate;

Fig. 2 is a top view of the test mold provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Fig. 1 shows the structure of the interlayer shearing device provided by the utility model for testing the interlayer bonding properties of the bridge asphalt concrete pavement structure. For ease of description, only the parts relevant to the present utility model are shown.

The utility model relates to an interlayer shearing device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structures. The interlayer shearing device for testing the interlayer bonding characteristics of bridge asphalt concrete pavement structures includes: a first force measuring ring, The first jack, the second force measuring ring, the second jack, the bracket, the working platform, the dial indicator, the first test mold, the second test mold, the third test mold, the fourth test mold, the reaction force frame , backing plate;

The first test mold and the second test mold, the third test mold and the fourth test mold are respectively connected together, the third test mold and the fourth test mold are fixed on the upper surface of the working platform, and the bracket is fixed on the left side of the working platform. The second jack is installed on the support, the bottom of the second jack is fixed on the reaction frame, and the second force measuring ring is placed between the second jack and the first test mold and the third test mold;

The first jack is set on the backing plate, the top of the first jack is fixed on the top of the reaction force frame, the first force measuring ring is set between the first jack and the backing plate, and the dial indicator is set on One side of the second test mold and the fourth test mold.

As an optimization scheme of the embodiment of the utility model, the first test mold and the second test mold, the third test mold and the fourth test mold are respectively connected together by bolts.

As an optimization scheme of the embodiment of the present utility model, the third test mold and the fourth test mold are fixed on the upper surface of the working platform by welding.

As an optimized solution of the embodiment of the utility model, the bracket is fixed on the left side of the working platform by welding.

As an optimized solution of the embodiment of the present invention, the bottom of the second jack is welded and fixed to the reaction force frame.

As an optimized solution of the embodiment of the present utility model, the top end of the first jack is fixed on the top of the reaction force frame by welding.

The application principle of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the interlayer shearing device of the test bridge asphalt concrete pavement structure interlayer bonding characteristics of the utility model embodiment is mainly composed of the first force measuring ring 1, the first jack 2, the second force measuring ring Ring 3, second jack 4, bracket 5, working platform 6, dial indicator 7, first test mold 8, second test mold 9, third test mold 10, fourth test mold 11, reaction force frame 12 , Backing plate 13 forms; The first test mold 8 and the second test mold 9, the third test mold 10 and the fourth test mold 11 are connected together by bolts respectively, and the third test mold 10 and the fourth test mold 11 are fixed by welding On the upper surface of the work platform 6, the support 5 is fixed on the left side of the work platform 6 by welding, the second jack 4 is installed on the support 5, the bottom of the second jack 4 is welded and fixed with the reaction force frame 12, and the second jack 4 is fixed by welding. The second force measuring ring 3 is placed between the second jack 3 and the first test mold 8 and the third test mold 10, the first jack 1 is arranged on the backing plate 13, and the top of the first jack 1 Be fixed on the top of the reaction force frame 12 by welding, the first force measuring ring 1 is arranged between the first jack 2 and the backing plate 13, and the dial gauge 7 is arranged on the second test mold 9 and the fourth test mold 11 side.

The working principle of the utility model: ensure that the first jack 1, the first force measuring ring 2 are consistent with the axis line of the sample, the second jack 3, the second force measuring ring 4 and the dial indicator 7 are measured The rod is consistent with the axes of the first test mold 8 and the second test mold 9. During the test, a vertical load and a horizontal load are manually applied, and the first force-measuring ring 2, the second force-measuring ring 4 and the percentage Table 7 reads out the magnitude of the applied load and the amount of deformation of the sample and sample respectively.

The shearing equipment of the utility model can test samples of different sizes by adjusting the distance between four symmetrical test molds, and apply horizontal load and vertical load at the same time, so as to better simulate the actual force of the bridge deck pavement In this case, the effect of dilatation in shearing is completely eliminated.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. interlayer shear device of testing bonding characteristic between bridge asphalt concrete pavement structural sheet, it is characterized in that, between this test bridge asphalt concrete pavement structural sheet, the interlayer shear device of bonding characteristic comprises: the first proving ring, the first lifting jack, the second proving ring, the second lifting jack, support, workbench, dial gauge, the first test mould, the second test mould, the 3rd test mould, the 4th test mould, reaction frame, backing plate;

The first test mould and the second test mould, the 3rd test mould and the 4th test mould are connected to together, the 3rd test mould and the 4th test mould are fixed on the upper surface of workbench, support is fixed on the left side of workbench, the second lifting jack is rack-mount, the bottom of the second lifting jack is fixed on reaction frame, and the second proving ring is placed between the second lifting jack and the first test mould, the 3rd test mould;

The first lifting jack be arranged on backing plate above, the top of the first lifting jack is fixed on the top of reaction frame, the first proving ring is arranged between the first lifting jack and backing plate, dial gauge is arranged on a side of the second test mould and the 4th test mould.

2. the interlayer shear device of bonding characteristic between test bridge asphalt concrete pavement structural sheet as claimed in claim 1, it is characterized in that, the first test mould is bolted and is in the same place with the second test mould, and the 3rd test mould is bolted and is in the same place with the 4th test mould.

3. the interlayer shear device of bonding characteristic between test bridge asphalt concrete pavement structural sheet as claimed in claim 1, is characterized in that, the 3rd test mould and the 4th test mould are fixed by welding in the upper surface of workbench.

4. the interlayer shear device of bonding characteristic between test bridge asphalt concrete pavement structural sheet as claimed in claim 1, is characterized in that, support is fixed by welding in the left side of workbench.

5. the interlayer shear device of bonding characteristic between test bridge asphalt concrete pavement structural sheet as claimed in claim 1, is characterized in that, bottom and the reaction frame of the second lifting jack are welded and fixed.

6. the interlayer shear device of bonding characteristic between test bridge asphalt concrete pavement structural sheet as claimed in claim 1, is characterized in that, the top of the first lifting jack is fixed by welding in the top of reaction frame.

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