Testing device for simulating influence of aircraft taxiing landing on foundation settlement

Abstract

The utility model discloses a test device for simulating the influence of aircraft taxiing and landing on foundation settlement, which relates to the technical field of foundation treatment and model test and comprises a trolley, a telescopic smooth guide rail, a thrust device, a vertical telescopic smooth platform, a buffer device, a monitoring sensor, a model runway and a model soil layer. The device creatively integrates a runway model box to reproduce a runway surface structure layer and a pile-net composite foundation, a taxiing landing device is adopted to simulate the taxiing landing process of an aircraft, and braking is achieved through a buffer device. A drainage device is embedded in the device, the sliding trolley is arranged in a front three-point mode to simulate a main landing gear of an airplane, and a 3-degree gliding angle is kept to be close to the real sliding condition. The test device not only considers the transverse impact force of an aircraft, but also performs adaptive design for different tire configurations, and provides a valuable simulation and monitoring means for exploring the dynamic characteristics of aircraft taxiing-landing integration on the pile-net composite foundation.

Description

Technical Field

[0001] This utility model relates to the field of foundation treatment and model testing technology, and in particular to a test device for simulating the impact of aircraft taxiing and landing on foundation settlement. Background Technology

[0002] Coastal cities in my country, such as Shanghai, Guangzhou, Shenzhen, and Dalian, already possess relatively complete airport systems. For example, the Dalian Jinzhou Bay International Airport, currently under construction, has deep soft soil foundations and complex geological conditions, requiring stringent control over post-construction settlement, uneven settlement, and differential settlement. In the reinforcement of soft soil foundations, geosynthetic materials can be effectively integrated into pile-supported foundations. For instance, the Boao Airport, during its construction, employed a pile-net composite treatment method for its soft soil foundation, demonstrating high applicability and effectively improving the bearing capacity and stability of embankments while reducing uneven settlement.

[0003] Current experimental setups for pile-net composite foundation runways primarily focus on the impact of vertical static and dynamic loads on the dynamic characteristics of these runways, with fewer designs for integrated aircraft taxiing and landing systems. Compared to highways, which primarily bear vertical loads and are less affected by lateral loads, airport runways also need to withstand the lateral impacts of aircraft taxiing and landing. Utility Model Content

[0004] The present invention aims to provide a test device for simulating the impact of aircraft taxiing and landing on foundation settlement, simulating the impact of the aircraft transmitting load through the wheels on the settlement and stress characteristics of the pile-net composite foundation during aircraft taxiing and landing.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An experimental device for simulating the impact of aircraft taxiing and landing on ground settlement includes a taxiing and landing device, a runway model box, and a data acquisition system;

[0007] The taxiing landing device includes a trolley, an aerial taxiing device, a buffer device, and a support column. The trolley includes a loading section and tires. The aerial taxiing device includes a retractable smooth guide rail, a thrust device, and a vertically retractable smooth platform. The trolley is placed on the vertically retractable smooth platform. The retractable smooth guide rail and the vertically retractable smooth platform are seamlessly connected and equipped with a remote control device. The thrust device is located behind the trolley. The upper part of the support column is connected to the vertically retractable smooth platform, and the right part is connected to the runway model box. A buffer device is provided at the end of the taxiing landing device.

[0008] The runway model box consists of a model runway, a model soil layer, a geogrid, and model piles from top to bottom.

[0009] The data acquisition system includes a computer and monitoring sensors. The monitoring sensors are respectively installed on the model track, model soil layer, model piles, as well as behind the buffer device and on the top and bottom of the retractable smooth guide rail. The monitoring sensors are connected to the computer.

[0010] Furthermore, the loading section of the trolley can be loaded with weights of different weights.

[0011] Furthermore, the runway model box is equipped with a drainage device, which is connected to the interior of the runway model box.

[0012] Furthermore, the runway model box has observation areas on its sides and top, and these observation areas are made of transparent glass.

[0013] Furthermore, the tires of the trolley are made of rubber material vulcanized from components such as rubber and steel wire.

[0014] Furthermore, the buffer device is externally provided with EPE pearl cotton for cushioning and noise reduction.

[0015] Furthermore, the retractable smooth guide rail has smooth grooves that conform to tire tracks, and these smooth grooves extend along the retractable smooth guide rail to ensure that the trolley slides along a designated route.

[0016] Furthermore, the tires of the trolley can be remotely configured to be either two-wheeled or dual-axle dual-wheeled.

[0017] Furthermore, the retractable smooth guide rail can be set to different lengths by remote control, the vertical retractable smooth platform can be set to different heights by remote control, and the included angle between the retractable smooth guide rail and the vertical retractable smooth platform is maintained at 87°. The length of the retractable smooth guide rail automatically changes with the change in the height of the vertical retractable smooth platform.

[0018] The principle and beneficial effects of this technical solution:

[0019] This invention provides a novel experimental device for simulating and monitoring aircraft taxiing and landing. It utilizes a runway model box to simulate the pavement structure layer and the pile-net composite foundation; a taxiing and landing device simulates the aircraft's taxiing and landing in the air, followed by braking by a buffer device; and finally, a computer processes the information collected by sensors. The device includes a drainage system for soft soil, and the materials of the trolley tires and the buffer cotton outside the buffer device are carefully considered. It also adopts the tricycle landing gear arrangement commonly used in aircraft main landing gear, and maintains the trolley's glide angle at 3° to meet aircraft taxiing requirements. This simulation experimental device considers the lateral impact of aircraft taxiing and different aircraft tire configurations, providing valuable reference for the practical study of the impact of integrated aircraft taxiing and landing on the dynamic characteristics of pile-net composite foundations. Attached Figure Description

[0020] Figure 1 This is a schematic block diagram of a test device for simulating the impact of aircraft taxiing and landing on ground settlement.

[0021] Figure 2 This is a front view of a test device that simulates the impact of aircraft taxiing and landing on ground settlement.

[0022] Figure 3 This is a cross-sectional view of the right side of a test device that simulates the impact of aircraft taxiing and landing on ground settlement.

[0023] Figure 4 This is a three-dimensional view inside an experimental device that simulates the impact of aircraft taxiing and landing on ground settlement.

[0024] The reference numerals in the accompanying drawings include:

[0025] 1. Trolley; 2. Extendable smooth guide rail; 3. Thrust device; 4. Vertical extendable smooth platform; 5. Buffer device; 6. Monitoring sensor; 7. Model track; 8. Model soil layer; 9. Geogrid; 10. Model pile; 11. Drainage device; 12. Support column; 13. Observation area; 14. Tires; 15. Loading part. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0027] like Figure 1-4 The diagram shows an experimental device for simulating the impact of aircraft taxiing and landing on ground settlement, comprising a taxiing and landing device, a runway model box, and a data acquisition system;

[0028] The taxiing landing device includes a trolley 1, an aerial taxiing device, a buffer device 5, and a support column 12. The trolley 1 includes a loading section 15 and tires 14. The loading section 15 of the trolley 1 can carry weights of different weights to simulate aircraft of different weights. The tires 14 of the trolley 1 are made of vulcanized rubber material composed of rubber, steel wire, etc., and the tires 14 of the trolley 1 can be remotely configured as dual-wheel or dual-axle dual-wheel configurations. The aerial taxiing device includes a retractable smooth guide rail 2, a thrust device 3, and a vertically retractable smooth platform 4. The retractable smooth guide rail 2 has smooth grooves that conform to the wheel tracks of the tires 14. These grooves extend along the retractable smooth guide rail 2 to ensure that the trolley 1 taxis along a designated route. The smooth guide rail 2 can be set to different lengths by remote control. The trolley 1 is placed on the vertically retractable smooth platform 4. The retractable smooth guide rail 2 and the vertically retractable smooth platform 4 are seamlessly connected and equipped with a remote control device. The vertically retractable smooth platform 4 can be set to different heights by remote control, and the included angle between the smooth guide rail and the smooth platform is kept at 87°. The length of the retractable smooth guide rail 2 changes automatically with the change of the height of the vertically retractable smooth platform 4. The thrust device 3 is set behind the trolley. The upper part of the support column 12 is connected to the vertically retractable smooth platform 4, and the right part is connected to the runway model box. A buffer device 5 is set at the end of the sliding landing device. EPE pearl cotton for buffering and noise reduction is set on the outside of the buffer device 5.

[0029] The runway model box consists of, from top to bottom, a model runway 7, a model soil layer 8, a geogrid 9, and model piles 10; observation areas 13 are provided on the sides and top of the runway model box, and the observation areas 13 are made of transparent glass.

[0030] The data acquisition system includes a computer and monitoring sensors 6. Monitoring sensors 6 include earth pressure cells, strain gauges, and velocity sensors. The earth pressure cells and strain gauges are respectively installed on the model track 7, model soil layer 8, model pile 10, and buffer device 5 to measure the stress and strain of each part of the soil layer, pile, and geogrid 9 after the trolley 1 slides and lands, and to measure the impact force of the trolley 1 when it slides on the model track 7. The velocity sensors are installed at the top and bottom of the retractable smooth guide rail 2 to measure the initial velocity of the trolley 1 during sliding and its landing speed. Monitoring sensors 6 are connected to the computer, which is equipped with an information processing system and a display screen.

[0031] First, earth pressure cells, strain gauges, etc., are installed behind the model pile 10, model soil layer 8, model runway 7, and buffer device 5. Velocity sensors are installed at the top and bottom of the smooth guide rail to collect information for subsequent tests. Then, before the test, the soil layer in the runway model box is consolidated and drained using the drainage device 11.

[0032] Secondly, the remote-controlled thrust device 3 is used to give the trolley 1 a certain initial speed, allowing it to slide along the smooth guide rail to the model track 7. The trolley 1 then slides a certain distance on the model track 7 before being braked by the buffer device 5. The vertically extendable platform can be remotely set to different heights, at which point the smooth guide rail can adjust its ramp length accordingly while maintaining a constant 3° downward slope angle. The loading device for the trolley 1 can hold different weights, which are embedded and fixed inside the trolley 1.

[0033] Finally, the information collected during the experiment is transmitted from monitoring sensor 6 to the connected computer, where it is processed by the information processing system. This experiment allows for monitoring of the initial speed of the trolley 1 and its speed upon reaching the runway using a speed sensor; it also allows for the measurement of stress and strain in the model pile 10 and model soil layer 8 at different depths using earth pressure cells and strain gauges, as well as the impact force after the trolley 1 lands, to study the influence of the integrated gliding-landing process on the pile-net composite foundation.

[0034] Working principle: Before the test, the soft soil layer in model soil layer 8 is prepared in the model box and model piles 10 are inserted to simulate the piles and soft soil foundation. Corresponding sensors are installed on the top and bottom of model piles 10, model soil layer 8, model track 7, buffer device 5, and smooth guide rail. To conform to the actual situation and stabilize the foundation structure, drainage device 11 is used to consolidate and drain the soil layer in the track model box, thereby accelerating its consolidation and allowing it to complete part of the settlement in advance. After selecting the weights, they are loaded into the trolley 1. The thrust device 3 is remotely controlled to push the trolley 1, which slides to the pile-net composite foundation track and stops when it is braked by the buffer device 5 after sliding a distance. The monitoring sensor 6 transmits the collected information to the computer connected to it, and the information processing system processes the data.

[0035] The landing of an aircraft is divided into several stages: descent, leveling, level flight, glide, and takeoff. This test device uses a weighted trolley 1 to simulate an aircraft, which descents on a retractable smooth track to take off on a model runway 7 until it is stopped by the braking device 5. This simulates the entire deceleration process of an aircraft from descent at a safe altitude to takeoff and then to a complete stop.

[0036] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A test apparatus for simulating the impact of aircraft taxiing and landing on ground settlement, characterized in that, This includes taxiing and landing equipment, a runway model box, and a data acquisition system; The taxiing landing device includes a trolley (1), an aerial taxiing device, a buffer device (5), and a support column (12). The trolley (1) includes a loading part (15) and tires (14). The aerial taxiing device includes a retractable smooth guide rail (2), a thrust device (3), and a vertical retractable smooth platform (4). The trolley (1) is placed on the vertical retractable smooth platform (4). The retractable smooth guide rail (2) and the vertical retractable smooth platform (4) are seamlessly connected and equipped with a remote control device. The thrust device (3) is located behind the trolley. The upper part of the support column (12) is connected to the vertical retractable smooth platform (4), and the right part is connected to the runway model box. A buffer device (5) is provided at the end of the taxiing landing device. The runway model box consists of a model runway (7), a model soil layer (8), a geogrid (9), and a model pile (10) from top to bottom; The data acquisition system includes a computer and monitoring sensors (6). The monitoring sensors (6) are respectively installed on the model track (7), the model soil layer (8), the model pile (10), the rear of the buffer device (5), and the top and bottom of the retractable smooth guide rail (2). The monitoring sensors (6) are connected to the computer.

2. The experimental apparatus for simulating the impact of aircraft taxiing and landing on ground settlement according to claim 1, characterized in that, The loading section (15) of the trolley (1) can carry weights of different weights.

3. The experimental apparatus for simulating the impact of aircraft taxiing and landing on ground settlement according to claim 1, characterized in that, The runway model box is equipped with a drainage device (11), which is connected to the interior of the runway model box.

4. The experimental apparatus for simulating the impact of aircraft taxiing and landing on ground settlement according to claim 1, characterized in that, The runway model box has observation areas (13) on its sides and top, and the observation areas (13) are made of transparent glass.

5. The experimental apparatus for simulating the impact of aircraft taxiing and landing on ground settlement according to claim 1, characterized in that, The tires (14) of the trolley (1) are made of rubber material that is vulcanized and includes rubber and steel wire components.

6. The experimental apparatus for simulating the impact of aircraft taxiing and landing on ground settlement according to claim 1, characterized in that, The buffer device (5) is externally provided with EPE pearl cotton for buffering and noise reduction.

7. The experimental apparatus for simulating the impact of aircraft taxiing and landing on ground settlement according to claim 1, characterized in that, The retractable smooth guide rail (2) has a smooth groove that conforms to the tire (14) wheel mark. The smooth groove extends with the retractable smooth guide rail (2) to ensure that the trolley (1) slides along the designated route.

8. The experimental apparatus for simulating the impact of aircraft taxiing and landing on foundation settlement according to claim 1, characterized in that, The tires (14) of the trolley (1) can be remotely configured to be in the form of two wheels or two axles and two wheels.

9. The experimental apparatus for simulating the impact of aircraft taxiing and landing on foundation settlement according to claim 1, characterized in that, The retractable smooth guide rail (2) can be set to different lengths by remote control, and the vertical retractable smooth platform (4) can be set to different heights by remote control. The included angle between the retractable smooth guide rail (2) and the vertical retractable smooth platform (4) is kept at 87°. The length of the retractable smooth guide rail (2) changes automatically with the change in the height of the vertical retractable smooth platform (4).

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