CN105954084A - Cubic soil sample preparation device and method - Google Patents

Abstract

The invention discloses a cubic soil sample preparation device and method. The device comprises a compacting cylinder and a soil sample compacting hammer matched with the compacting cylinder; The casing consists of a cube; the soil sample compaction hammer includes a square compaction plate and a guide rod fixedly connected with the compaction plate; A cylindrical heavy hammer is sleeved on the top, and a handle is provided on the upper part of the guide rod. The length and width of the compacting plate match the length and width of the casing of the compacting tube. The preparation method is: divide the soil material into more than 2 equal parts first, then pour 1 part of the soil material into the casing, and compact it with a soil sample compaction hammer until all the soil materials are compacted; Remove them one by one; take out the prepared soil samples. The device is light in weight, easy to disassemble and install, can produce fixed-size cubic soil samples, and is resistant to acid and alkali corrosion; the method is simple and operable.

Description

Cubic soil sample preparation device and method

technical field

The invention belongs to the technical field of civil engineering testing, and in particular relates to a cubic soil sample preparation device and method.

Background technique

When making soil samples for geotechnical tests, the soil sample preparation devices used in the prior art have a relatively simple structure, mainly cylindrical. When the test needs to use different shapes as test variables, it lacks a complete and efficient preparation Soil sample molds of different shapes, usually when preparing cubic soil samples, it is customary to use the existing ring knife to make cylindrical soil samples first, and then use the soil repair knife to trim the appropriate shape and size of the soil sample, which makes the sample preparation process more difficult. Obstructed, or the prepared soil sample does not meet the standard and required strength, and the prepared soil sample has a large error in size.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned problems existing in the prior art, provide a kind of cube soil sample preparation device and method, this device is light in weight, easy to disassemble and install, acid and alkali corrosion resistance, can make the cube soil sample of fixed size; The method is simple and operable.

The technical scheme that the present invention solves technical problem is:

A cubic soil sample preparation device, comprising a compaction cylinder and a soil sample compaction hammer matched with the compaction cylinder;

The compacting cylinder is composed of a square base and a hollow cubic casing arranged on the base; the casing is formed by vertically connecting four square steel plates of the same size and size, and one side of each steel plate is connected to the Two threaded holes are respectively provided on the sides of the steel plates connected by the sides, and two adjacent steel plates are fixedly connected by fastening screws;

The soil sample compacting hammer comprises a square compacting plate, a guide rod fixedly connected with the compacting plate; a cylinder is fixedly arranged in the center of the compacting plate, the guide rod is fixedly connected with the cylinder, and the Cylindrical heavy hammer, the diameter of the cylinder matches the diameter of the heavy hammer, there is a handle on the upper part of the guide rod, and the length and width of the compaction plate are suitable for the length and width of the casing of the compaction tube match.

The base of the compacting cylinder is provided with a positioning groove adapted to the casing for fixing the casing.

A cylinder is fixed at the center of the compacting plate, and the diameter of the cylinder matches the diameter of the weight. When the heavy hammer compacts the soil sample, the cylinder has a buffer function to protect the compaction plate.

The handle has the function of stabilizing the compaction hammer, preventing shaking during compaction, and ensuring the flatness of the compaction hammer.

All parts of the casing and the soil sample compaction hammer are made of high-strength 304 steel.

Apply the described cube soil sample preparation device to the method for soil sample preparation, its specific steps are as follows:

(1) Prepare the soil material and divide the soil material into more than 2 equal parts;

(2) Pour 1 portion of soil material into the casing of the compaction cylinder, and compact it with a soil sample compaction hammer;

(3) Repeat step (2) until all soil materials are compacted;

(4) Use a wrench to unscrew the screws on the steel plate of the casing, and remove the four steel plates one by one;

(5) Take out the prepared soil sample.

After putting in the soil material in step (2), the soil sample compaction hammer is placed above the casing of the compaction cylinder, and the soil sample is compacted by lifting the compaction hammer.

In step (3), each compacted layer shall be anchored and leveled with a soil repair knife for the prepared soil sample.

For each compaction mentioned above, it should be ensured that the compaction hammer falls vertically, and the compaction points must be evenly distributed on the soil surface.

Beneficial effects of the present invention:

1. The cubic soil sample preparation device of the present invention is light in weight, resistant to acid and alkali corrosion, easy to disassemble and install, and easy to operate, and can make cubic soil samples of fixed size.

2. The casing tightens the four steel plates by fastening screws, which is easy to disassemble and install, and is easy to operate. It prevents the soil sample preparation device from loosening during hitting, reduces the influence of lateral stress on the soil sample, and ensures the flatness of the soil sample. .

3. The square base of the compaction cylinder is provided with positioning grooves matching the casing to fix the casing and ensure the integrity of the soil sample during compaction.

4. In the process of preparing soil samples, each compaction should ensure that the compaction hammer falls vertically, and the compaction points must be evenly distributed on the soil surface to ensure that the force on the soil surface is uniform and reduce the influence of errors.

5. All parts of the casing and the soil sample compaction hammer are made of high-strength 304 steel, which is corrosion-resistant and has a smooth inner surface, ensuring that the surface of the soil sample is smooth and easy to demould.

Description of drawings

Fig. 1 is the structural representation of the cube compacting cylinder of the device of the present invention;

Fig. 2 is a structural schematic diagram of a soil sample compacting hammer of the device of the present invention.

In the figure: 1. Compaction barrel 1-1 Base 1-2. Casing 1-3. Steel plate 1-4. Fastening screw 1-5. Positioning groove 2. Soil sample compaction hammer 2-1. Compaction Plate 2-2. Weight 2-3. Guide rod 2-4. Handle 2-5. Cylinder.

detailed description

The content of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited thereto.

Example

Referring to Figures 1 and 2, a cubic soil sample preparation device includes a compaction cylinder 1 and a soil sample compaction hammer 2 adapted to the compaction cylinder 1;

The compacting cylinder 1 is composed of a square base 1-1 and a hollow cubic casing 1-2 arranged on the base 1-1; the casing 1-2 is composed of four square steel plates 1-3 of the same size. It is made of two vertical connections, and two threaded holes are respectively provided on one side of each steel plate and the side surface of the steel plate connected to the side, and the two adjacent steel plates are fixedly connected by fastening screws 1-4;

The soil sample compaction hammer 2 includes a square compaction plate 2-1, a guide rod 2-3 fixedly connected with the compaction plate 2-1; a cylinder 2 is fixedly arranged at the center of the compaction plate 2-1 -5, the guide rod 2-3 is fixedly connected with the cylinder 2-5, and the cylindrical weight 2-2 is sleeved on the guide rod 2-3, and the diameter of the cylinder 2-5 is the same as that of the weight 2-2. For adaptation, the top of the guide rod 2-3 is also provided with a handle 2-4, and the length and width of the compacting plate 2-1 are compatible with the length and width of the compacting tube casing 1-2.

The base 1-1 of the compacting cylinder 1 is provided with a positioning groove 1-5 matched with the casing 1-2 for fixing the casing 1-2.

A cylinder 2-5 is fixed at the center of the compacting plate 2-1, and the diameter of the cylinder 2-5 matches the diameter of the weight 2-2. When the weight 2-2 compacts the soil sample, the cylinder 2-5 has a buffer function and plays a role of protecting the compacting plate 2-1.

The handle 2-4 has the function of stabilizing the compacting hammer 2, preventing shaking during compaction, and ensuring the smoothness of the sample.

All parts of the casing 1-2 and the soil sample compaction hammer 2 are made of high-strength 304 steel.

The method for preparing a soil sample using the cube soil sample preparation device of the present invention, its specific steps are as follows:

(1) Prepare the soil material and divide the soil material into 3-5 equal parts;

(2) Pour 1 portion of soil material into the casing 1-2 of the compaction cylinder 1, and compact it with the soil sample compaction hammer 2;

(3) Repeat step (2) until all soil materials are compacted; each compacted layer must be anchored and leveled with a soil repair knife; each time compacted, it should be ensured that the weight falls freely The hit points must be evenly distributed on the soil surface.

(4) Use a hex wrench to unscrew the screws 1-4 on the steel plates 1-3 of the casing 1-2, and remove the four steel plates 1-3 one by one;

(5) Take out the prepared soil sample.

In this embodiment, the hollow cubic casing 1-2 of the compaction cylinder 1 is formed by vertically connecting four square steel plates 1-3 with a side length of 50 mm. The size of the prepared soil sample is a cube with a side length of 50 mm.

Claims (5)

1. The cubic soil sample preparation device is characterized in that: the device comprises a compacting cylinder and a soil sample compacting hammer compatible with the compacting cylinder; The compacting cylinder is composed of a square base and a hollow cubic casing arranged on the base; the casing is formed by vertically connecting four square steel plates of the same size and size, and one side of each steel plate is connected to the Two threaded holes are respectively provided on the sides of the steel plates connected by the sides, and two adjacent steel plates are fixedly connected by fastening screws; The soil sample compacting hammer comprises a square compacting plate, a guide rod fixedly connected with the compacting plate; a cylinder is fixedly arranged in the center of the compacting plate, the guide rod is fixedly connected with the cylinder, and the Cylindrical heavy hammer, the diameter of the cylinder matches the diameter of the heavy hammer, there is a handle on the upper part of the guide rod, and the length and width of the compaction plate are suitable for the length and width of the casing of the compaction tube match. 2. The cubic soil sample preparation device according to claim 1, characterized in that: the base of the compacting cylinder is provided with a positioning groove matching with the casing for fixing the casing. 3. according to the method for the cubic soil sample preparation device described in any one of claim 1-2 carrying out soil sample preparation, it is characterized in that, concrete steps are as follows: (1) Prepare the soil material, divide the soil material into more than 2 equal parts; (2) Pour 1 portion of soil material into the casing of the compaction cylinder, and compact it with a soil sample compaction hammer; (3) Repeat step (2) until all soil materials are compacted; (4) Use a wrench to unscrew the screws on the steel plate of the casing, and remove the four steel plates one by one; (5) Take out the prepared soil sample. 4. The method for preparing a cubic soil sample according to claim 3, characterized in that: after the soil material is put in step (2), the soil sample compacting hammer is placed above the casing of the compacting cylinder, Lift the compacting hammer to compact the soil sample. 5 . The method for preparing a cubic soil sample according to claim 3 , characterized in that: in step (3), for each layer compacted, the soil sample should be anchored and leveled with a soil repair knife. 5 .