Roadbed compactness detection device based on sand filling method

Abstract

The invention relates to the technical field of roadbed compactness detection, and particularly discloses a roadbed compactness detection device based on a sand filling method, which comprises an assembly plate, a plurality of support columns arranged on the lower side of the assembly plate, a turntable rotationally connected to the assembly plate, a hanging pipe arranged on the turntable, a compensation device arranged on the lower side of the hanging pipe, and a connecting material barrel arranged on the turntable, a sand injection pipe is arranged at the bottom of the receiving barrel. According to the roadbed compactness detection device based on the sand filling method provided by the invention, a horizontal plane is formed on the surface of the pit opening of the test pit through the compensation device, and then standard sand is injected into the test pit, the standard sand cannot slide off from the lower part of the test pit, so that the test result of the roadbed compactness cannot be influenced, the compensation device can be adjusted, and the detection accuracy is improved. And the device is suitable for roadbeds with different gradients.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed compaction detection, and in particular to a roadbed compaction detection device based on a sand injection method. Background Art

[0002] The compaction degree of the roadbed is one of the key indicators for the quality inspection of the roadbed and pavement construction. It characterizes the density condition after on-site compaction. The higher the compaction degree, the greater the density and the better the overall performance of the material. The compaction degree of the roadbed is a quality control indicator for fill engineering. First, take the soil sample before compaction and send it to the laboratory to determine its dry density at the optimum moisture content, which is the maximum dry density of the sample. Then take the compacted sample to determine its actual dry density. The actual dry density divided by the maximum dry density is the actual compaction degree of the soil. By comparing this number with the compaction degree specified in the standard, you can know whether the compaction degree of the soil has reached the quality standard. The methods for testing the compaction degree of the roadbed usually adopt the ring knife method, the sand filling method and the nuclear density meter method.

[0003] The sand filling method is the main method for measuring compaction on many engineering sites. When measuring the compaction of the roadbed by the sand filling method, first dig a test pit according to the size, weigh the sample mass, and measure the moisture content of the sample; then inject test sand into the test pit, and when the sand fills the test pit, calculate the mass of the standard sand used to fill the test pit. In this way, the compaction of the roadbed is calculated. However, in the actual road construction process, there will be uphill or downhill sections on the road. When testing the slope section, the upper surface of the test pit is also an inclined surface. When filling the sand, one side of the upper surface of the test pit is high and the other side is low. The standard sand will flow along the lower side to the outside of the test pit, which will cause deviations in the actual amount of sand injected, resulting in inaccurate compaction in the later test. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a roadbed compaction detection device based on the sand injection method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A roadbed compaction detection device based on the sand injection method includes an assembly plate, a plurality of support columns are installed on the lower side of the assembly plate, a rotatable connection turntable is installed on the assembly plate, a hanging pipe is installed on the turntable, a compensation device is installed on the lower side of the hanging pipe, a connecting material barrel is installed on the turntable, and a sand injection pipe is provided at the bottom of the material barrel.

[0007] Preferably, the support column is a telescopic rod with adjustable length.

[0008] Preferably, the compensation device includes a first circular ring and a second circular ring which are hinged to each other, a folded corrugated membrane is arranged between the first circular ring and the second circular ring, a cavity is formed between the folded corrugated membrane, the first circular ring and the second circular ring, a hanging pipe is connected to the cavity, air is inflated into the cavity through the hanging pipe, and the air pressure in the cavity increases, thereby increasing the angle between the first circular ring and the second circular ring.

[0009] Preferably, a plurality of spirit levels are provided on the upper side of the second ring.

[0010] Preferably, a plurality of support plates are arranged on the outer surface of the first circular ring.

[0011] Preferably, a plurality of guide plates are fixedly connected to the lower side of the first ring.

[0012] Beneficial effects of the present invention: A roadbed compaction detection device based on the sand filling method provided by the present invention forms a horizontal plane on the pit mouth surface of the test pit through a compensation device. After injecting standard sand into the test pit, the standard sand will not slide from the lower part of the test pit, which will not affect the test result of the roadbed compaction. The compensation device can be adjusted and is suitable for use on roadbeds with different slopes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a basic structural diagram of a roadbed compaction detection device based on the sand filling method provided by the present invention;

[0014] Figure 2 It is a basic structural diagram of the compensation device;

[0015] Figure 3 is a cross-sectional view of the compensating device;

[0016] Figure 4 It is a usage state diagram of the present invention;

[0017] Figure 5 It is the coordination state diagram of the compensation device and the test pit;

[0018] Figure 6 It is a basic structural diagram of the test pit. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Example 1

[0021] like Figure 1-6As shown, a roadbed compaction detection device based on the sand filling method of this embodiment includes an assembly plate 1, and a plurality of support columns 11 are installed on the lower side of the assembly plate 1. The support columns 11 are telescopic rods with adjustable lengths. The assembly plate 1 can be fixed by the support columns 11, and the assembly plate 1 can also be supported according to the on-site conditions.

[0022] The assembly plate 1 is provided with a rotating hole, in which a rotating disc 2 is rotatably connected. A center hole is provided at the center of the rotating disc 2, in which a material barrel 3 is rotatably connected. A sand injection pipe 31 is provided at the bottom of the material barrel 3.

[0023] The rotating disk 2 is provided with a hanging pipe 4, and a compensating device 5 is provided at the lower side of the hanging pipe 4. The function of the compensating device 5 is to set a template at the pit mouth of the test pit 200 of the roadbed 100, so that the pit mouth surface of the test pit 200 can form a horizontal plane, and after the standard sand is injected into the test pit 200, the standard sand will not slide down from the lower part of the test pit 200. This will not affect the test result of the roadbed compaction degree. Due to the inconsistency of the slope of the road surface, in order to make the compensation device 5 suitable for roadbeds with different slopes, the present embodiment makes a special design for the compensation device 5. In the present embodiment, the compensation device 5 includes a first circular ring 51 and a second circular ring 53 which are hinged to each other, and a folded corrugated membrane 54 is arranged between the first circular ring 51 and the second circular ring 53. A cavity 50 is formed between the folded corrugated membrane 54, the first circular ring 51 and the second circular ring 53. The hanging pipe 4 is connected to the cavity 50, and air is inflated into the cavity 50 through the hanging pipe 4. When the air pressure in the cavity 50 increases, the angle between the first circular ring 51 and the second circular ring 53 increases, and when the air pressure in the cavity 50 decreases, the angle between the first circular ring 51 and the second circular ring 53 decreases under the cooperation of gravity.

[0024] A plurality of levels 56 are provided on the upper side of the second circular ring 53, through which the staff can observe whether the second circular ring 53 is in a horizontal state. A plurality of guide plates 55 are fixedly connected to the lower side of the first circular ring 51, and the guide plates 55 are stuck at the pit mouth of the test pit 200, which guide the first circular ring on the one hand and limit the first circular ring on the other hand to prevent the first circular ring from shifting. A plurality of support plates 52 are provided on the outer ring surface of the first circular ring 51, and the support plates 52 are attached to the upper surface of the roadbed 100 to increase the grip of the first circular ring and make the first circular ring 51 more secure.

[0025] At the same time, in this embodiment, a plurality of infrared rangefinders are installed on the lower side of the turntable 2. The infrared rangefinders also rotate along with the turntable 2 during its rotation. Thus, the recording paper of each rotation of the turntable 2 can be measured by the plurality of infrared rangefinders, from which the slope of the road surface can be deduced, thereby indirectly detecting the slope of the road surface.

[0026] In this embodiment, the actual sand filling amount = the sand filling amount of the material bucket - the sand storage amount of the compensation device. Thus, the compaction degree of the roadbed can be calculated. In addition, the sand storage amount of the compensation device can be calculated based on the angle between the first ring 51 and the second ring 53.

Claims

1. A roadbed compaction detection device based on the sand filling method, characterized in that: The invention comprises an assembly plate (1), a plurality of support columns (11) are arranged on the lower side of the assembly plate (1), a turntable (2) is rotatably connected to the assembly plate (1), a hanging pipe (4) is arranged on the turntable (2), a compensation device (5) is arranged on the lower side of the hanging pipe (4), a material connection barrel (3) is arranged on the turntable (2), and a sand injection pipe (31) is arranged at the bottom of the material connection barrel (3).

2. A roadbed compaction detection device based on the sand filling method according to claim 1, characterized in that: The support column (11) is a telescopic rod with adjustable length.

3. A roadbed compaction detection device based on sand filling method according to claim 1, characterized in that: The compensation device (5) comprises a first circular ring (51) and a second circular ring (53) which are hinged to each other, a folded corrugated membrane (54) is arranged between the first circular ring (51) and the second circular ring (53), a cavity (50) is formed between the folded corrugated membrane (54), the first circular ring (51) and the second circular ring (53), the hanging pipe (4) is connected to the cavity (50), and air is inflated into the cavity (50) through the hanging pipe (4). When the air pressure in the cavity (50) increases, the angle between the first circular ring (51) and the second circular ring (53) increases.

4. A roadbed compaction detection device based on the sand filling method according to claim 3, characterized in that: A plurality of levels (56) are provided on the upper side of the second circular ring (53).

5. The roadbed compaction detection device based on the sand filling method according to claim 3 is characterized in that: A plurality of support plates (52) are arranged on the outer ring surface of the first circular ring (51).

6. A roadbed compaction detection device based on sand filling method according to claim 3, characterized in that: A plurality of guide plates (55) are fixedly connected to the lower side of the first circular ring (51).

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