Test model device for testing load transfer effect of fill close to bridge foundation

Abstract

The utility model provides a test model device for testing a load transfer effect of a fill close to a bridge foundation, which comprises a first support plate, a first through groove is arranged on the first support plate, the bridge foundation is arranged in the first through groove, and a bridge is arranged at the top end of the bridge foundation; a third supporting plate is arranged on one side of the first through groove and located at one end of the first supporting plate, a plurality of rib supporting plates are arranged on the third supporting plate, a pressure bearing plate is arranged above the rib supporting plates, a pressurizing assembly is arranged above the pressure bearing plate, slope ratio sliding plates are arranged on the two sides of the pressurizing assembly, and a slope ratio sliding plate is arranged on the slope ratio sliding plates. A connecting plate is arranged between the slope ratio sliding plates, and second through grooves are formed in the slope ratio sliding plates. By adopting the test model device for testing the load transfer effect of the fill close to the bridge foundation, the function of controlling the influence coefficient of the fill pressure behind the support structure under different factors on the close bridge foundation is realized, and the original slope ratio and the distance from the bridge foundation to the support structure can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering testing, and in particular to a test model device for testing the load transfer effect of adjacent bridge foundation embankment. Background Technology

[0002] With the rapid development of transportation infrastructure construction, bridge engineering occupies an important position in various construction projects. However, when embankment works are carried out near existing bridges, the embankment load has a significant impact on the magnitude of the earth pressure transmitted to the existing bridge foundation. Currently, there are two understandings of earth pressure transmission in design: one is that the earth pressure load of the adjacent embankment is directly transmitted to the bridge piers and foundation (pile foundation and abutment) structure; the other is that the earth pressure load of the adjacent embankment is completely resisted by the support structure of the embankment slope, and there is no earth pressure transmission phenomenon. These two situations do not conform to the earth pressure transmission effect in actual engineering. In fact, the transmission effect of the adjacent embankment load on the earth pressure on the bridge foundation is between the two. However, there is currently no suitable method to determine the earth pressure transmission effect. Using model tests to obtain this parameter is highly feasible.

[0003] Earth pressure transmission is influenced by various factors, such as the slope ratio of the original slope, the magnitude of the fill load, the properties of the fill material, the horizontal distance between the bridge foundation and the adjacent fill slope support structure, and the reinforcement measures of the original foundation. Existing model test devices cannot study the impact of various fill factors on the bridge foundation, nor can they obtain the true earth pressure transmission coefficient. Therefore, there is an urgent need to develop a multifunctional model test device suitable for testing the earth pressure transmitted by fill load to adjacent bridge foundations. Utility Model Content

[0004] The purpose of this invention is to provide an experimental model device for testing the load transfer effect of embankment embankment near bridge foundations. It can simulate different conditions and monitor the magnitude of the soil pressure transferred by the embankment load to the adjacent bridge foundation.

[0005] To achieve the above objectives, this utility model provides an experimental model device for testing the load transfer effect of adjacent bridge foundation embankment, including a first support plate, a first through groove provided on the first support plate, a bridge foundation provided in the first through groove, and a bridge being provided at the top of the bridge foundation.

[0006] A third support plate is provided on one side of the first through groove, located at one end of the first support plate. Multiple support ribs are provided on the third support plate. A pressure plate is provided above the support ribs. A pressurizing component is provided above the pressure plate. Slope sliding plates are provided on both sides of the pressurizing component. A connecting plate is provided between the slope sliding plates. A second through groove is provided on the slope sliding plate.

[0007] Preferably, a second support plate is provided below the first support plate, and a third through groove is provided on the second support plate. A first guide block is provided in the third through groove at one end of the bridge foundation.

[0008] Preferably, a pier is provided on the bridge foundation, and slots are provided on both sides of the first through groove, with the pier connected to the slots.

[0009] Preferably, an upper clamping plate and a lower clamping plate are respectively provided on the upper and lower sides of the connecting plate, the connecting plate is connected to the upper clamping plate and the lower clamping plate, and the slope sliding plate is located in the slot formed between the upper clamping plate and the lower clamping plate.

[0010] Preferably, a fourth support plate is provided at one end between the slope sliding plates, and sliding grooves are provided on both sides of the fourth support plate.

[0011] Preferably, a connecting rod is provided between the third support plate and the fourth support plate, and one end of the connecting rod is movably connected to one end of the slope sliding plate.

[0012] Preferably, a fifth support plate is provided at the other end of the first support plate, and both the third and fifth support plates are connected to the second support plate.

[0013] Preferably, a pressure sensor is installed on the bridge foundation.

[0014] Preferably, the pressure plate is located above the connecting plate.

[0015] Preferably, the third support plate has multiple holes located on the side near the bridge.

[0016] Therefore, the present invention adopts the above-mentioned test model device for testing the load transfer effect of adjacent bridge foundation embankment, which can simulate different loads on the upper part of the embankment; can simulate the original topographic slope ratio and original slope landform; can control the distance from the bridge foundation to the support structure; and can change the vertical position of the bridge foundation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an experimental model device for testing the load transfer effect of adjacent bridge foundation embankment according to the present invention;

[0018] Figure 2 This is a partial schematic diagram of an experimental model device for testing the load transfer effect of adjacent bridge foundation embankment according to the present invention.

[0019] Figure 3 This is a schematic diagram of the area near the bridge foundation of the experimental model device for testing the load transfer effect of adjacent bridge foundation embankment according to the present invention;

[0020] Figure 4This is a schematic diagram of the area near the connecting plate of an experimental model device for testing the load transfer effect of adjacent bridge foundation embankment according to this utility model.

[0021] Figure Labels

[0022] 1. First support plate; 2. First through groove; 3. Bridge foundation; 4. Bridge; 5. Third support plate; 6. Support rib plate; 7. Pressure plate; 8. Pressurization component; 9. Slope sliding plate; 10. Connecting plate; 11. Second through groove; 12. Second support plate; 13. Third through groove; 14. First guide block; 15. Foundation; 16. Upper clamping plate; 17. Lower clamping plate; 18. Fourth support plate; 19. Slide groove; 20. Connecting rod; 21. Fifth support plate; 22. Pressure sensor. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0024] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0025] Example 1

[0026] like Figure 1-4 As shown, this utility model provides a test model device for testing the load transfer effect of adjacent bridge foundation 3 embankment, including a first support plate 1, a first through groove 2 is provided on the first support plate 1, a bridge foundation 3 is provided in the first through groove 2, there are multiple first through grooves 2, and multiple bridge foundations 3 are also provided. The bridge foundation 3 can be located in the same first through groove 2 or in multiple first through grooves 2.

[0027] A bridge is installed at the top of bridge foundation 3, and a bridge deck is installed at the top of the bridge.

[0028] A third support plate 5 is provided on one side of the first through groove 2, located at one end of the first support plate 1. Multiple support ribs 6 are provided on the third support plate 5. A pressure plate 7 is provided above the support ribs 6. A pressurizing component 8 is provided above the pressure plate 7. The pressurizing component 8 is a common pressurizing device on the market, such as a pressurizing column. Slope sliding plates 9 are provided on both sides of the pressurizing component 8. A connecting plate 10 is provided between the slope sliding plates 9. A second through groove 11 is provided on the slope sliding plates 9. A fourth support plate 18 is provided at one end between the slope sliding plates 9. Slide grooves 19 are provided on both sides of the fourth support plate 18.

[0029] A screw is installed in the second through groove 11 and located in the slide groove 19. A nut is installed at one end of the screw. The slope sliding plate 9 is tightly fixed to the fourth support plate 18 by the screw and the nut. At the same time, the inclination of the slope sliding plate 9 and the length of the slope sliding plate 9 between the third support plate 5 and the fourth support plate 18 can be adjusted as needed.

[0030] A second support plate 12 is provided below the first support plate 1. A third through groove 13 is provided on the second support plate 12. A first guide block 14 is provided in the third through groove 13 at one end of the bridge base 3. The first guide blocks 14 can be connected by a through rod. When moving, the first guide block 14 can move along the third through groove 13.

[0031] A pier 15 is provided on the bridge foundation 3. Slots are provided on both sides of the first through slot 2. The pier 15 is connected to the slots. When moving, the pier 15 can move along the slots. The pier 15 and the first guide block 14 have a dual function to ensure the stability of the bridge foundation 3 movement. Two sensors are arranged on the pier 1514.

[0032] The connecting plate 10 has an upper clamping plate 16 and a lower clamping plate 17 on its upper and lower sides, respectively. The connecting plate 10 is connected to the upper clamping plate 16 and the lower clamping plate 17, and the slope sliding plate 9 is located in the groove formed between the upper clamping plate 16 and the lower clamping plate 17. The upper clamping plate 16, the connecting plate 10, and the lower clamping plate 17 are connected in sequence by screws and nuts. At the same time, the position of the connecting plate 10 is fixed by the clamps between the upper clamping plate 16, the lower clamping plate 17, and the slope sliding plate 9.

[0033] A connecting rod 20 is provided between the third support plate 5 and the fourth support plate 18. One end of the connecting rod 20 is movably connected to one end of the slope sliding plate 9, and can be a rotating shaft connection.

[0034] The other end of the first support plate 1 is provided with a fifth support plate 21. The third support plate 5 and the fifth support plate 21 are both connected to the second support plate 12. The box formed by the fifth support plate 21, the third support plate 5 and the fixing plates on both sides can be filled with soil.

[0035] Pressure sensor 22 is installed on bridge foundation 3.

[0036] The bearing plate 7 is located above the connecting plate 10. The lower part of the bearing plate 7 is the backfill area, which is used to simulate different loads on the upper part of the backfill.

[0037] When using this device to test the load transfer effect of adjacent bridge embankment embankment, the third and second support plates are connected by slots. Four rows of sensors are distributed on both sides of the upper plate to receive different soil pressures from the left and right sides of the support structure (composed of the third support plate and the buttress plate). The slope sliding plate is adjusted until the required slope is achieved, and then bolted to the fourth support plate. The lower end of the slope sliding plate is bolted to the sliding device of the connecting rod. The slope is changed by adjusting the sliding device and the position of the groove on the connecting rod until the required slope is achieved. The upper and lower clamping plates on the slope sliding plate clamp the connecting plate to be simulated in the test, and the upper and lower clamping plates are used to ensure that the slope panel position meets the requirements of the test.

[0038] After adjusting the required slope and slope panel position for the test, backfilling was carried out on top of the connecting plate, ensuring its compaction and distribution behind the support structure, between the buttresses, and on the connecting plate. A bearing plate simulating a road slab was then placed horizontally on top of the compacted backfill, tightly against the slope sliding plate. The load was applied to the top of the bearing plate, with an upper control plate used to adjust the load magnitude and pressure frequency, and lower pressure columns simulating various loads on the upper section.

[0039] After adjusting the slope and load, adjust the third channel on the left to connect the bridge deck, bridge abutment, second support plate, and pier cap using an embedded structure. Adjust the position of the second support plate embedded at the bottom of the lower plate to change the distance between the bridge abutment and the support structure to meet the requirements of the test. After adjusting the required distance, install sensors on the right side of the bridge abutment and pier cap, and fill soil on the left side of the bridge abutment, pier cap, and third support plate, and monitor the sensor readings. The earth pressure transmission coefficient can be defined as the ratio of the earth pressure received by the sensor on the right side of the upper plate to the earth pressure received by the sensor on the left side of the bridge abutment.

[0040] When using this device to test the load transfer effect of adjacent bridge abutment embankment, fill is placed on the right side of the superstructure and between the bridge abutment and the support structure, respectively. The pressure application components and slope are adjusted. The test begins, and the earth pressure sensors on both sides of the third support plate start transmitting the earth pressure they bear in real time. By using the controlled variable method, adjusting the distance between the bridge abutment and the support structure, the original slope, and the pressure application method and magnitude in each data set, the magnitude of the earth pressure transfer coefficient under different conditions can be analyzed.

[0041] The sensor installed on the left side of the third support plate can represent the earth pressure exerted by the backfill on the sensor. The retaining structure resistance coefficient can be defined by the ratio of the earth pressure received by the sensor on the right side of the upper plate to the earth pressure received by the sensor on the left side of the third support plate.

[0042] Therefore, this utility model adopts the above-mentioned test model device for testing the load transfer effect of adjacent bridge foundation embankment, which realizes the testing of the earth pressure transfer coefficient of embankment load and the blocking coefficient of the support structure. It can also change the original slope, the distance between the bridge foundation and the support structure, and the pressure application method and magnitude, further filling the functional gaps in existing simulation test devices.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A test model device for testing the load transfer effect of adjacent bridge embankment embankment, characterized in that, It includes a first support plate, a first through groove on the first support plate, a bridge base in the first through groove, and a bridge at the top of the bridge base; A third support plate is provided on one side of the first through groove, located at one end of the first support plate. Multiple support ribs are provided on the third support plate. A pressure plate is provided above the support ribs. A pressurizing component is provided above the pressure plate. Slope sliding plates are provided on both sides of the pressurizing component. A connecting plate is provided between the slope sliding plates. A second through groove is provided on the slope sliding plate.

2. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, A second support plate is provided below the first support plate, and a third through groove is provided on the second support plate. A first guide block is provided in the third through groove at one end of the bridge foundation.

3. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, A pier is provided on the bridge foundation, and slots are provided on both sides of the first through groove, with the pier connected to the slots.

4. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, The upper and lower sides of the connecting plate are respectively provided with an upper clamping plate and a lower clamping plate. The connecting plate is connected to the upper clamping plate and the lower clamping plate. The slope sliding plate is located in the slot formed between the upper clamping plate and the lower clamping plate.

5. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, A fourth support plate is provided at one end between the slope sliding plates, and sliding grooves are provided on both sides of the fourth support plate.

6. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, A connecting rod is provided between the third support plate and the fourth support plate, and one end of the connecting rod is movably connected to one end of the slope sliding plate.

7. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, A fifth support plate is provided at the other end of the first support plate, and both the third and fifth support plates are connected to the second support plate.

8. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, Pressure sensors are installed on the bridge foundation.

9. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, The pressure plate is located above the connecting plate.

10. The experimental model device for testing the load transfer effect of adjacent bridge embankment embankment according to claim 1, characterized in that, The third support plate has multiple holes located on the side near the bridge.

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