Earthwork filling compaction degree and uniformity detection device

Abstract

The application relates to the technical field of earthwork detection, and particularly discloses a device for detecting the compaction degree and uniformity of earth filling, which comprises a bottom plate, a positioning rod, a detection plate, a data analysis processor and a height adjusting mechanism. The height adjusting mechanism can be used to set the falling height of the detection plate, so that the detection plate freely falls along the positioning rod and impacts the bottom plate, thereby transmitting the impact energy to the soil. The data analysis processor collects and analyzes the vibration signals generated by the impact, calculates the compaction degree of the soil based on characteristic parameters such as impact acceleration and vibration attenuation, and evaluates the filling uniformity through multi-point detection data. The device is simple in structure and convenient to operate, and can realize rapid and effective on-site detection of the compaction quality of soil layers at different depths.

Description

Technical Field

[0001] This application relates to the field of engineering testing technology, and in particular to a device for testing the compaction degree and uniformity of earthwork filling. Background Technology

[0002] Earthwork filling is a crucial construction phase in building, road, and water conservancy projects, and its compaction quality directly affects the safety and durability of the project. Compaction degree is a core indicator for evaluating earthwork filling quality, reflecting the density of the soil; uniformity characterizes the spatial consistency of the compaction quality. Currently, rapid and effective on-site quality testing of earthwork filling is an important measure to ensure project quality.

[0003] Existing technologies for on-site testing of soil compaction mainly include the ring cutter method, sand cone method, and nuclear density meter method. While these methods can provide accurate compaction data, they generally have limitations such as complex operation, long processing time, and difficulty in quickly evaluating the uniformity of large areas. In particular, existing equipment is often inadequate for situations requiring the testing of compaction distribution at different soil depths.

[0004] More importantly, existing equipment typically requires repeated testing at different locations when detecting uniformity, which is inefficient and makes it difficult to establish a complete compaction quality distribution map. In practical engineering, construction workers urgently need an on-site testing device that can quickly and accurately detect the compaction degree of soil layers at different depths and visually reflect the uniformity of the fill. Utility Model Content

[0005] The earthwork compaction and uniformity testing device provided in this application assesses the compaction and uniformity of soil layers at different depths by adjusting the drop height of the testing plate to impact the soil and analyzing the vibration signal. This enables rapid and accurate multi-depth testing of the quality of filling projects, significantly improving testing efficiency and accuracy.

[0006] This application provides a device for testing the compaction degree and uniformity of earthwork filling, including:

[0007] The base plate is used to place the soil surface to be tested;

[0008] The positioning rod is vertically fixed to the base plate;

[0009] The detection plate is slidably connected to the positioning rod and can slide up and down along the positioning rod.

[0010] The data analysis processor is used to process the vibration data generated by the impact of the detection plate and analyze the compaction degree and uniformity of the soil.

[0011] A height adjustment mechanism, mounted on the positioning rod, is used to adjust the initial height position of the detection plate.

[0012] Furthermore, the height adjustment mechanism includes a mounting frame and a limiting component. The mounting frame is fixed on the positioning rod, and the detection plate is provided with multiple slots. The limiting component is adjustablely set on the mounting frame and can selectively engage with slots of different heights to fix the height of the detection plate.

[0013] Furthermore, the limiting component includes:

[0014] Fixed bracket, slidably connected within the mounting bracket;

[0015] The limiting frame is connected to the fixed frame through an elastic element and can be locked into the slot under the action of elastic force;

[0016] A locking mechanism is used to lock the mounting bracket at different height positions on the mounting bracket.

[0017] Furthermore, the locking mechanism includes:

[0018] Toothed plate, fixed on the mounting bracket;

[0019] The limiting gear frame is connected to the fixed frame via a sliding component and can engage and lock with the gear plate;

[0020] The elastic reset element acts on the limiting gear frame to keep it engaged with the gear plate;

[0021] The pull rod, connected to the limit gear, is used to release the engagement lock.

[0022] Furthermore, the sliding assembly includes a sliding cylinder and a sliding rod. The sliding cylinder is fixed on the fixed frame, and the sliding rod is slidably disposed inside the sliding cylinder and connected to the limiting tooth frame. The elastic reset element is a contraction spring sleeved on the sliding rod.

[0023] Furthermore, the elastic element is a telescopic spring, with one end connected to the fixed frame and the other end connected to the limiting frame.

[0024] Furthermore, the mounting bracket is equipped with a height marker to indicate the height position of the detection plate.

[0025] Furthermore, it also includes a carrying frame connected between the positioning rod and the mounting bracket, the surface of which is provided with anti-slip texture.

[0026] Furthermore, the base plate has an anti-rust coating on its surface, and the base plate is connected to the mounting bracket via a connecting block.

[0027] The technical solution provided in this application has at least the following technical effects or advantages:

[0028] 1. With a precisely adjustable height adjustment mechanism, the drop height of the detection plate can be quickly set to achieve compaction testing of soil layers at different depths. This solves the technical problem of limited detection depth in traditional equipment and significantly improves detection efficiency and application range.

[0029] 2. The mechanical locking system, employing a combination of a slot and a limiting gear, along with a height indicator, ensures intuitive, accurate, stable, and reliable height adjustment. The modular design facilitates easy assembly and disassembly of components, reducing equipment maintenance difficulty and operating costs. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the base plate in this application;

[0031] Figure 2 This is a rear view of the base plate in this application;

[0032] Figure 3 This is a top sectional view of the mounting bracket in this application;

[0033] Figure 4 For this application Figure 2 Enlarged schematic diagram of the structure at point A;

[0034] In the diagram: 1. Base plate; 2. Positioning rod; 3. Detection plate; 4. Data analysis processor; 5. Control component; 501. Slot; 502. Mounting bracket; 503. Height indicator; 504. Fixing bracket; 505. Telescopic spring; 506. Limiting bracket; 507. Sliding cylinder; 508. Sliding rod; 509. Limiting gear; 510. Retraction spring; 511. Toothed plate; 512. Pull rod; 6. Carrying bracket; 7. Connecting block. Detailed Implementation

[0035] The earthwork compaction and uniformity testing device provided in this application assesses the compaction and uniformity of soil layers at different depths by adjusting the drop height of the testing plate to impact the soil and analyzing the vibration signal. This achieves rapid and accurate multi-depth testing of the quality of filling projects, significantly improving testing efficiency and accuracy. To better understand the above technical solution, a detailed description of the solution will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Example 1:

[0037] Please see Figures 1 to 4 This embodiment provides a device for detecting the compaction degree and uniformity of earthwork filling. Its core innovation lies in the ability to quickly detect the compaction degree and uniformity of soil layers at different depths through an adjustable impact testing mechanism.

[0038] The device includes a base plate 1, which is made of 304 stainless steel, 10mm thick, and 300mm × 300mm in size. The bottom surface of the base plate 1 is treated with an anti-slip coating to enhance its stability in contact with the earthwork surface. A positioning rod 2 is vertically welded to the center of the upper surface of the base plate 1. The positioning rod 2 is a round steel bar with a diameter of 30mm and a height of 1200mm, and its surface is chrome-plated to improve wear resistance.

[0039] The detection plate 3 is slidably connected to the positioning rod 2 via a linear bearing. The detection plate 3 is a 200mm×200mm×15mm steel plate, weighing 5kg. The fit clearance between the inner hole of the detection plate 3 and the positioning rod 2 is 0.5mm, ensuring smooth sliding while preventing excessive wobbling. A set of rectangular slots 501 are symmetrically opened on the side of the detection plate 3. The slots 501 are 10mm deep, with a slot spacing of 50mm, and a total of 20 slots, corresponding to a detection depth range of 0-950mm.

[0040] The data analysis processor 4 is installed inside the protective box and fixed to the side of the base plate 1 by a bracket. This processor uses an ARM Cortex-M7 core and has a built-in triaxial accelerometer (range ±50g, resolution 0.001g) with a sampling frequency of 1000Hz. The processor communicates with a mobile terminal via Bluetooth and is equipped with dedicated data analysis software, which can display vibration waveforms in real time, calculate compaction indices, and generate uniformity distribution maps.

[0041] Example 2:

[0042] This embodiment provides a detailed description of the height adjustment mechanism based on Embodiment 1.

[0043] The core of the height adjustment mechanism is the control component 5, which includes a mounting bracket 502, a fixing bracket 504, and a limiting component. The mounting bracket 502 is a U-shaped frame, which is fixedly connected to the base plate 1 and the positioning rod 2 via connecting blocks 7. The mounting bracket 502 is made of aluminum alloy, which is lightweight and has high strength.

[0044] The fixing bracket 504 is slidably connected to the inner wall of the mounting bracket 502 via a slide rail slider mechanism, with a sliding stroke of 950mm. A limit bracket 506 is installed on the fixing bracket 504, and the two are connected by four sets of telescopic springs 505. The stiffness coefficient of the telescopic springs 505 is 2N / mm, and the preload is 10mm, which can provide sufficient clamping force.

[0045] The locking mechanism of the limiting assembly includes a toothed plate 511, a limiting gear frame 509, and an operating mechanism. The toothed plate 511 is a straight rack with a module of 1.5, which is fixed to the side of the mounting bracket 502 by screws. The limiting gear frame 509 is connected to the fixed bracket 504 through a guide mechanism consisting of two sets of sliding cylinders 507 and sliding rods 508. The inner diameter of the sliding cylinders 507 is 12mm, the diameter of the sliding rods 508 is 11.8mm, and the clearance is 0.1mm to ensure motion accuracy.

[0046] A retraction spring 510 is sleeved on the sliding rod 508, with a spring stiffness coefficient of 5 N / mm and a preload of 15 mm, which can reliably maintain the meshing state between the limiting gear 509 and the toothed plate 511. The pull rod 512 is made of engineering plastic and has anti-slip texture at the end for easy operation.

[0047] The mounting bracket 502 has a height gauge 503 mounted on its front, with a scale accuracy of 1mm and laser engraving to ensure durability. The gauge 503 is equipped with a vernier for accurate depth reading.

[0048] The working principle of this application is based on the drop hammer impact method, which assesses compaction quality by allowing an adjustable-height test plate to fall freely and impact the soil surface. Specifically, during operation, the initial height of the test plate is first set using the height adjustment mechanism: pulling the pull rod outward disengages the limiting toothed frame from the toothed plate; after sliding the fixing frame to the target height, the pull rod is released, and the limiting toothed frame re-engages and engages with the corresponding slot on the test plate to complete positioning. After the test is initiated, the test plate falls freely along the positioning rod, impacting the base plate at the preset height, transferring the impact energy to the soil. The impact vibration is collected and analyzed in real time by a data analysis processor. By processing characteristic parameters such as impact acceleration and vibration attenuation, and combining them with a preset calibration model, the soil compaction degree is calculated, and the uniformity of the earthwork filling is assessed using multi-point test data.

[0049] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A device for detecting the compaction degree and uniformity of earthwork filling, characterized in that, include: The base plate (1) is used to place on the surface of the soil to be tested; The positioning rod (2) is vertically fixed to the base plate (1); The detection plate (3) is slidably connected to the positioning rod (2) and can slide up and down along the positioning rod (2); Data analysis processor (4) is used to process the vibration data generated by the impact of the detection plate (3) and analyze the compaction degree and uniformity of the soil. A height adjustment mechanism is provided on the positioning rod (2) and is used to adjust the initial height position of the detection plate (3).

2. The earthwork filling compaction degree and uniformity testing device according to claim 1, characterized in that: The height adjustment mechanism includes a mounting bracket (502) and a limiting component. The mounting bracket (502) is fixed on the positioning rod (2). The detection plate (3) is provided with multiple slots (501). The limiting component is adjustablely set on the mounting bracket (502) and can selectively be inserted into slots (501) of different heights to fix the height of the detection plate (3).

3. The earthwork filling compaction degree and uniformity testing device according to claim 2, characterized in that: The limiting component includes: The fixed bracket (504) is slidably connected to the mounting bracket (502); The limiting frame (506) is connected to the fixed frame (504) through an elastic element and can be inserted into the slot (501) under the action of elastic force. A locking mechanism is used to lock the mounting bracket (504) at different height positions on the mounting bracket (502).

4. The earthwork filling compaction degree and uniformity testing device according to claim 3, characterized in that: The locking mechanism includes: The toothed plate (511) is fixed on the mounting bracket (502); The limiting gear (509) is connected to the fixed frame (504) via a sliding component and can engage and lock with the gear plate (511); The elastic reset element acts on the limiting gear (509) to keep it engaged with the gear plate (511); A pull rod (512) is connected to a limit gear (509) and is used to release the engagement lock.

5. The earthwork filling compaction degree and uniformity testing device according to claim 4, characterized in that: The sliding assembly includes a sliding cylinder (507) and a sliding rod (508). The sliding cylinder (507) is fixed on the fixing frame (504). The sliding rod (508) is slidably disposed in the sliding cylinder (507) and connected to the limiting tooth frame (509). The elastic reset element is a retraction spring (510) sleeved on the sliding rod (508).

6. The earthwork filling compaction degree and uniformity testing device according to claim 3, characterized in that: The elastic element is a telescopic spring (505), one end of which is connected to the fixed frame (504) and the other end is connected to the limiting frame (506).

7. The earthwork filling compaction degree and uniformity testing device according to claim 2, characterized in that: The mounting bracket (502) is equipped with a height indicator (503) to indicate the height position of the detection plate (3).

8. The earthwork filling compaction degree and uniformity testing device according to claim 1, characterized in that: It also includes a carrying frame (6) connected between the positioning rod (2) and the mounting frame (502), and the surface of the carrying frame (6) is provided with anti-slip texture.

9. The earthwork filling compaction degree and uniformity testing device according to claim 1, characterized in that: The base plate (1) has a rust-proof coating on its surface and is connected to the mounting bracket (502) via a connecting block (7).

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