Roadbed water content detection device

Abstract

The utility model relates to the technical field of road roadbed construction, and discloses a roadbed water content detection device which comprises a detection box, the top of the detection box is open, a gas circulation chamber is formed at the bottom of the detection box, a supporting net plate is arranged in the detection box above the gas circulation chamber, and the supporting net plate is connected with the detection box. An air hole communicated with the outside is formed in the side wall of the gas circulation chamber; according to the soil moisture detection device, the detection efficiency can be improved, moisture in soil can be fully volatilized, and the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road subgrade construction, in particular to a device for detecting the water content of subgrade. Background Art

[0002] The control of the water content of subgrade fills is of crucial significance to the quality of subgrade filling, which is mainly reflected in the following aspects: The water content of the subgrade filling material directly affects its compaction degree. Compacting under the condition of the optimal water content can make the filling material reach the maximum dry density, thereby improving the density and strength of the subgrade. If the water content is too small, it is difficult to compact and it is difficult to reach the required compaction degree; if the water content is too large, the "spring phenomenon" will occur, resulting in a decrease in compaction degree and affecting the quality of the subgrade. Reasonable water content control helps to ensure the stability of the subgrade. Too low water content may lead to insufficient adhesion between subgrade materials, prone to problems such as looseness and cracking; while too high water content may lead to problems such as settlement and deformation of the subgrade during later use. The durability of the subgrade is closely related to its filling quality. Reasonable water content control can ensure that the subgrade maintains good performance during long-term use and reduce the occurrence of diseases caused by water content changes. Therefore, during the subgrade filling process, it is necessary to strictly control the water content of the filling material to ensure that it is compacted within the optimal water content range to improve the filling quality and overall performance of the subgrade.

[0003] Currently, methods for detecting water content include the drying method, neutron scattering method, alcohol combustion method, and dielectric method, etc. The alcohol combustion method is a fast and relatively accurate on-site test method for detecting the water content of subgrade fills, especially suitable for the rapid determination of soil moisture content at the construction site. This method indirectly measures the water content of the soil by using the principle that alcohol evaporates water when burning in the soil. An electronic balance needs to be prepared to ensure the accuracy of the measurement. At the same time, take aluminum boxes that have been washed and numbered, weigh them and record, which serves as the basis for subsequent calculations. Use tools such as plastic spoons to take representative samples from the subgrade fills and evenly spread them in the aluminum boxes of known weight. Then, weigh and record again to obtain the wet mass of the sample. Add alcohol and burn it. Inject alcohol into the aluminum box containing the soil sample through a dropper or other tools. Then, place the aluminum box on an asbestos net and ignite the alcohol to evaporate the water. After the flame goes out, cool it down, and repeat this burning process 2 - 3 times until a constant weight state is reached. Immediately weigh after the last burning and cooling to obtain the total weight of the dried soil and the aluminum box. Calculate the soil water content according to the formula W=(m1 - m2) / m2×100%, where m1 is the wet mass of the sample, m2 is the mass of the dried soil, and W is the water content.

[0004] When using the alcohol combustion method to detect the water content of subgrade fills, when burning the subgrade soil materials with an existing aluminum box, since the subgrade soil materials are directly laid flat on the bottom of the aluminum box for burning, there is a lack of oxygen flow at the bottom of the soil materials, resulting in problems such as low combustion efficiency and incomplete combustion, which leads to low detection efficiency and deviation in the accuracy of the detection results. Therefore, there is an urgent need for a subgrade water content detection device that can improve the detection efficiency and enhance the detection accuracy. Summary of the Invention

[0005] The purpose of the present invention is to provide a subgrade water content detection device that can improve the detection efficiency, enable the moisture in the soil materials to be fully volatilized, and enhance the detection accuracy.

[0006] The present invention adopts the following technical solutions:

[0007] A subgrade water content detection device includes a detection box, wherein the top of the detection box is open, a gas circulation chamber is formed at the bottom of the detection box, a support mesh plate is arranged in the detection box above the gas circulation chamber, and air holes communicating with the outside are arranged on the side wall of the gas circulation chamber.

[0008] Preferably, a collection bin is detachably arranged at the bottom of the detection box, and the gas circulation chamber is arranged in the collection bin.

[0009] Preferably, the air holes are inclined upward from the outside to the inside.

[0010] Preferably, an intercepting net is arranged inside the air holes.

[0011] Preferably, a bracket is slidably arranged at the top end of each detection box, and a clamping sleeve is movably arranged on the bracket.

[0012] Preferably, a receiving groove is formed at the bottom of the collection bin, a material leveling plate is placed in the receiving groove, a support rod that can be clamped with the clamping sleeve is arranged on the material leveling plate, and a pull rod is arranged at the top end of the support rod.

[0013] Preferably, a sliding groove is formed on the side wall of the detection box, and the bracket is slidably located in the sliding groove.

[0014] Preferably, rollers are movably arranged on the bracket, and the bracket is slidably located in the sliding groove through the rollers.

[0015] Preferably, both ends of the sliding groove are through settings.

[0016] Preferably, a connecting boss protrudes upward from the top of the collection bin, and the collection bin is connected to the detection box through the connecting boss.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model can place the soil material on the support mesh plate. During combustion, the outside gas is introduced into the gas circulation chamber through the air holes and contacts the soil material on the support mesh plate from below. With the assistance of the airflows at both the upper and lower ends, the alcohol can be burned quickly and fully, thereby evaporating and carrying away the moisture contained in the soil material, improving the efficiency of moisture volatilization, enhancing the detection efficiency, and at the same time improving the detection accuracy. The structure is simple, the operation and use are convenient, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of an embodiment of the present application;

[0019] Figure 2 is a schematic structural view of the collection bin of an embodiment of the present application;

[0020] Figure 3 is the front view of the material leveling plate of an embodiment of the present application;

[0021] Figure 4 is Figure 1 the enlarged view of A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present utility model will be clearly and completely described below in conjunction with the drawings and embodiments:

[0023] As Figures 1 to 4 shown, a subgrade moisture content detection device of the present utility model includes a detection box 1. The detection box 1 can be processed and manufactured using the same material as the aluminum box used in the prior art or made of other refractory materials. The top of the detection box 1 is open, which is convenient for taking and placing the subgrade soil material to be detected. A gas circulation chamber 2 is formed at the bottom of the detection box 1. An air hole 3 communicating with the outside is provided on the side wall of the gas circulation chamber 2. A support mesh plate is arranged in the detection box 1 above the gas circulation chamber 2. The mesh holes of the support mesh plate are smaller than the particle size of the soil material to be detected, ensuring that the airflows can pass through while providing support for the soil material. During operation, the soil material is placed on the support mesh plate, and alcohol is added to the soil material. Subsequently, the alcohol is ignited. Since there is gas circulation at both the upper and lower ends of the support mesh plate, it can not only play a role in assisting combustion, improving the combustion efficiency, quickly volatilizing the moisture in the soil material, but also reducing the probability of the water vapor in the combustion process contacting and adsorbing the soil material again, improving the detection accuracy.

[0024] Furthermore, a collection bin 5 is detachably arranged at the bottom of the detection box 1, and the gas circulation chamber 2 is arranged in the collection bin 5 to facilitate the collection and cleaning of the soil material that accidentally falls into the gas circulation chamber 2. In this embodiment, the air holes 3 are arranged obliquely upward from the outside to the inside close to the gas circulation chamber 2, which can provide a certain guidance for the external air flow and enable the air flow to smoothly enter the bottom of the support mesh plate; an intercepting net 6 is arranged on one side of the inside of the air hole 3 located in the gas circulation chamber 2 to ensure the passage of the air flow while preventing the soil material falling into the gas circulation chamber 2 from falling out through the air holes 3 and ensuring the detection accuracy.

[0025] Furthermore, a bracket 7 is slidably arranged at the top end of the detection box 1. The bracket 7 is of an L-shaped structure, and a clamping sleeve 8 is movably arranged on the bracket 7. The clamping sleeve 8 can be used to clamp a material leveling tool for turning the soil material to ensure the stability of the material leveling tool during the material leveling process and further improve the sufficiency of combustion. Preferably, a receiving groove 9 is opened at the bottom of the collection bin 5, and a material leveling plate 10 is placed in the receiving groove 9. The material leveling plate 10 is of an L-shaped structure, and the front end is arranged in a comb-like shape. A support rod 11 that can be clamped with the clamping sleeve 8 is arranged on the material leveling plate 10. The support rod 11 is arranged at one end far from the comb-like structure. The support rod 11 is of a cylindrical structure, and the clamping sleeve 8 is made of deformable rubber material. A clamping opening 12 is arranged on one side. The support rod 11 can be clamped in the clamping sleeve 8 through the clamping opening 12. A pull rod 13 is arranged at the top end of the support rod 11, which is convenient for manually pulling the pull rod 13 to drive the material leveling plate 10 to move to complete the turning of the soil material and improve the combustion efficiency. The movable connection between the clamping sleeve 8 and the bracket 7 facilitates the adjustment of the angle of the material leveling plate 10 to make it better contact with the soil material and complete the turning operation of the soil material.

[0026] In this embodiment, a sliding groove 14 is opened on the side wall of the detection box 1, and the bracket 7 is slidably located in the sliding groove 14; preferably, a roller 15 is movably arranged on the bracket 7, and the bracket 7 is slidably located in the sliding groove 14 through the roller 15 to reduce the friction between the bracket 7 and the detection box 1 during operation. In addition, both ends of the sliding groove 14 are arranged to be through, which is convenient for the disassembly of the bracket 7 and the detection box 1. After use, the bracket 7 can be removed from both sides of the detection box 1 to provide convenience for subsequent placement and storage. A connecting boss 16 protrudes upward from the top of the collection bin 5, and the collection bin 5 is connected to the detection box 1 through the connecting boss 16; since the upper and lower opening sizes of the detection box 1 are the same, the bracket 7 can be disassembled and placed on the support mesh plate after detection, and the connection between the connecting boss 16 and the top of the detection box 1 is used to seal the top of the detection box 1, which is convenient for storage and placement and avoids the loss of parts.

[0027] When the utility model is in use, the air flow entering the gas circulation chamber 2 through the air holes 3 passes through the support net, which can provide combustion support for the combustion of alcohol from the lower part, enabling the alcohol to burn fully, thereby improving the volatilization efficiency of the moisture in the soil material, allowing the moisture to volatilize fully, enhancing the detection efficiency, and improving the detection accuracy; since there is air flow at both the upper and lower ends of the support net plate, the probability of water vapor being adsorbed by the soil material again during the combustion process is also reduced, which can further improve the detection accuracy and ensure the accuracy of the detection.

Claims

1. A subgrade water content detection device, characterized in that: Including a detection box, wherein the top of the detection box is open, a gas circulation chamber is formed at the bottom of the detection box, a support mesh plate is arranged in the detection box above the gas circulation chamber, and air holes communicating with the outside are arranged on the side wall of the gas circulation chamber.

2. The subgrade water content detection device according to claim 1, characterized in that: A collection bin is detachably arranged at the bottom of the detection box, and the gas circulation chamber is arranged in the collection bin.

3. The subgrade water content detection device according to claim 2, characterized in that: The air holes are arranged to incline upward from outside to inside.

4. The subgrade water content detection device according to claim 3, characterized in that: An intercepting net is arranged inside the air holes.

5. The subgrade water content detection device according to claim 2, characterized in that: A bracket is slidably arranged at the top end of each detection box, and a clamping sleeve is movably arranged on the bracket.

6. The subgrade water content detection device according to claim 5, characterized in that: A receiving groove is formed at the bottom of the collection bin, a material leveling plate is placed in the receiving groove, a support rod that can be clamped with the clamping sleeve is arranged on the material leveling plate, and a pull rod is arranged at the top end of the support rod.

7. The subgrade water content detection device according to claim 5, characterized in that: A sliding groove is formed on the side wall of the detection box, and the bracket is slidably located in the sliding groove.

8. The subgrade moisture content detection device according to claim 7, characterized in that: Rollers are movably arranged on the bracket, and the bracket is slidably located in the sliding groove through the rollers.

9. The subgrade moisture content detection device according to claim 8, characterized in that: Both ends of the sliding groove are arranged to be through.

10. The subgrade water content detection device according to claim 9, characterized in that: A connecting boss protrudes upward from the top of the collection bin, and the collection bin is connected to the detection box through the connecting boss.

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