TWI485402B - Weak soil of the soil - Google Patents

Description

Compressed top soil in soft soil

The invention belongs to the technical field of soil testing, in particular to a compressed air topping structure applied to obtain a weak muddy test body, which is directly pressurized into the thin tube sampler by air pressure, and replaces the traditional pressure with a flexible air pressure. A hard piston pushes the soil sample in the thin tube sampler.

In an indoor test to obtain the strength and deformability of soil materials, the sources of soil samples include undisturbed soil samples and heavy mold soil samples. For the acquisition of undisturbed soil samples, the sampling operation from the in-situ drilling, the operating principle is expected to obtain a soil sample sufficient to represent the state by means of non-disturbance or low disturbance. In the prior art, the local sampling mainly uses a thin tube sampler, and a thin tube test body which is undisturbed or low-disturbed can be obtained. However, when we transport the thin tubes obtained from the local sampling to the laboratory, the work to be done is the preparation of the specimens and the preparation before the test. Before the test operation, the test piece needs to be pushed out from the thin tube sampler, and this introduction process is again a disturbing behavior for the soil. For weak soils, it has the characteristics of low strength and high compressibility. When it is introduced from the thin tube sampler, how to reduce the degree of pushing disturbance to fully reflect the engineering characteristics of the local state is an important consideration in the test operation. factor.

The traditional type of top earther uses a one-way piston to press in from one end of the sampler, push the soil, and push the soil sample out of the other end of the sampler. Upright and horizontal push. The vertical top boring machine combines the pneumatic piston cylinder, the sampler and the mold used for the operation soil test in a vertical arrangement on a set of vertical reaction frames in an upright arrangement. Above the cylinder shaft, adjust the pressure again, use the shaft to push the soil out of the sampling tube, and the soil sample is pushed out of the sampler and then into the sample mold. The horizontal pusher can be placed on the platform, and the H-shaped steel is used as the base of the fixed sampler fixture. The rear end of the sampler is equipped with a threaded push rod and a piston, and the rotary threaded rod is used to rotate the shaft. The propulsion method pushes the piston to push the soil sample out of the sampler, and the sample is pushed out of the sampler and then continues to enter the sample mold. In the above two ways, in the process of taking out the soil test body, the test object is squeezed, and for the low-strength and high-compressibility weak soil, the result of the subsequent test operation is obviously affected.

Therefore, in view of the problems existing in the above-mentioned conventional structure, how to develop an innovative structure with more ideal and practicality is really eagerly awaited by consumers, and it is also the goal and direction of relevant industry players to make efforts to develop breakthroughs. In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

In the process of taking out the soil test body, the use of the top soil squeezing action on the test body will obviously affect the results of subsequent test operations for the weak soil with low strength and high compressibility.

The utility model relates to a compressed air top turf of a weak soil, which comprises: a bracket, the bracket has a consistent perforation in the center, and a plurality of gears are arranged around the through hole a bracket, the bracket is provided with an accommodating space under the through hole, and a test body mold can be placed; a positioning plate is disposed on the bracket around the through hole, and each of the brackets The blocking plates abut each other, so that the positioning plate is not displaced and slid when placed on the bracket; one side of the positioning plate is provided with an opening, and a bottom of the positioning plate is respectively provided with a block at the bottom of the positioning plate a plate slot; the positioning plate can fix the position of a thin tube sampler, and the thin tube sampler is aligned with the sample mold; wherein one side of the positioning plate can be provided with an opening for facilitating a thin tube sampler Taking a baffle, the baffle can cover the through hole, and can be slidably disposed in the baffle slot of the positioning plate; a pressing cap, the pressing cap is sleeved on the thin tube for sampling With the above configuration, the thin tube sampler equipped with a soil sample body is placed on the baffle plate, and the pressure cap is placed, and then the baffle is positioned at the opening of the positioning plate. Edge, the edge of the baffle is flattened to the positioning plate, and the baffle is pushed into the baffle slot and aligned Perforating, finally removing the baffle from the baffle slot, aligning the thin tube sampler with the test piece mold, and then applying pneumatic pressure from the top end of the pressurizing cap to the thin tube sampler, The soil sample in the thin tube sampler is moved by the air pressure and enters the test piece mold below.

The invention directly presses the air pressure into the thin tube sampler, and replaces the traditional hard piston with a flexible pneumatic pressure to push the soil sample in the thin tube sampler according to material size, friction characteristics and viscosity. The characteristics, etc. are adjusted at any time to push the pressure of the pressing pressure. During the pushing process, the contact between the soil sample and the wall of the thin sampler can be penetrated by air pressure. Forming a pressure film on the interface to substantially reduce the frictional resistance between the soil sample and the wall of the thin sampler, so that the soil sample can be moved without a large pressure and pressure, and The airflow outlet below the thin tube sampler can also form an upwardly supported buoyancy to protect the soil test body, so that the bottom of the soil test body does not collapse and is flat, and then the test body is slowly pushed out and connected to The test was in the mold. In this process, the soil sample is pushed by the flexible atmospheric pressure, and the pressure film formed between the soil sample and the wall of the thin sampler completely reduces the disturbance of the weak soil and avoids affecting the deformation. With strength.

The above-mentioned objects, structures and features of the present invention will be described in detail with reference to the preferred embodiments of the present invention. .

10‧‧‧ bracket

11‧‧‧through holes

12‧‧ ‧Flap

13‧‧‧ accommodating space

20‧‧‧Testing mold

30‧‧‧ Positioning board

31‧‧‧Baffle slot

32‧‧‧ openings

40‧‧‧ thin tube sampler

50‧‧ ‧ baffle

60‧‧‧Pressure cap

70‧‧‧ soil test

Figure 1 is a schematic perspective view of the present invention.

Figure 2 is a perspective exploded view of the present invention.

Figure 3 is a schematic illustration of the baffle of the present invention being pushed into the baffle slot.

Fig. 4 is a schematic view showing the baffle of the present invention taken out from the baffle groove.

Figure 5 is a schematic illustration of the present invention applying pressure from the top of a pressurized cap to a thin tube sampler.

Figure 6 is a schematic diagram of the soil test body in the test mold.

First, the preferred embodiments of the present invention are shown in Figures 1 through 6, but the embodiments are for illustrative purposes only and are not limited by the structure.

As shown in FIG. 1 to FIG. 2, the compressed air top type of the soft soil includes: a bracket 10, the bracket 10 is provided with a continuous through hole 11 at the center, and the plurality of flaps 12 are disposed around the through hole 11. An accommodating space 13 is disposed under the through hole 11 , and a sample mold 20 can be disposed; a positioning plate 30 is disposed on the bracket 10 around the through hole 11 and Each of the blocking pieces 12 on the bracket 10 abuts against each other such that the positioning plate 30 does not displace and slide when placed on the bracket 10; an opening 32 is provided on one side of the positioning plate 30, and the opening 32 is provided at the opening 32 A baffle groove 31 is respectively disposed at the bottom of the positioning plate 30 on both sides; the positioning plate 30 can fix the position of a thin tube sampler 40, and the thin tube sampler 40 is aligned with the sample mold 20; The baffle 50 can cover the through hole 11 and can be slidably disposed in each of the baffle slots 31 of the positioning plate 30; wherein the baffle 50 is shaped like a convex shape; a pressing cap 60, The pressing cap 60 is sleeved on the thin tube sampler 40; by the above configuration, as shown in FIGS. 3 to 6, the thin tube containing the soil sample 70 is sampled. 40 is placed on the baffle 50 first, and then the pressing cap 60 is placed, and then the baffle 50 is positioned at the edge of the opening 32 of the positioning plate 30, so that the edge of the baffle 50 is flattened to the positioning plate. 30, the baffle 50 is pushed into the baffle slot 31 and aligned with the through hole 11. Finally, the baffle 50 is taken out from the baffle slot 31, and the thin tube sampler 40 is aligned with the test. The body mold 20, at this time, applying pressure from the top end of the pressurizing cap 60 to the thin In the tube sampler 40, the soil sample body 70 in the thin tube sampler 40 is moved by the air pressure to enter the sample mold 20 below.

The compressed air topping device of the weak soil is directly pressurized into the thin tube sampler 40 by air pressure, and the traditional hard piston is replaced by a flexible pneumatic pressure to push the soil sample in the thin tube sampler 40. 70, the pressure of the pressing pressure can be adjusted at any time according to the material size, the frictional property, the viscous property, etc., and during the pushing process, the soil test body 70 and the wall of the thin tube sampler 40 can be penetrated by air pressure at the same time. The contact interface forms a pressure gas film on the interface to sufficiently reduce the frictional resistance between the soil test body 70 and the wall surface of the thin tube sampler 40, so that the soil test body 70 can be moved without requiring a large atmospheric pressure. And the airflow outlet below the thin tube sampler 40 is shunted to form an upwardly supporting buoyancy to protect the soil test body 70, so that the bottom of the soil test body 70 does not collapse and is flat, and then slowly The test piece was introduced and continued into the test mold. In this process, since the soil test body 70 is pushed by the flexible atmospheric pressure, and the pressure film formed between the soil test body 70 and the wall of the thin tube sampler 40, the disturbance of the weak soil is sufficiently reduced to avoid Affect its deformation and strength.

The above description is summarized by the design of the structure of the present invention, which has the above-mentioned numerous advantages and practical values. Therefore, the present invention is an innovative invention, and the same or similar product creation or disclosure is not found in the same technical field. The use of the invention has met the requirements of the novelty and the progressiveness of the invention patent, and is submitted in accordance with the law.

10‧‧‧ bracket

11‧‧‧through holes

12‧‧ ‧Flap

13‧‧‧ accommodating space

20‧‧‧Testing mold

30‧‧‧ Positioning board

31‧‧‧Baffle slot

32‧‧‧ openings

40‧‧‧ thin tube sampler

50‧‧ ‧ baffle

60‧‧‧Pressure cap

Claims (2)

The utility model relates to a compressed air top type earth boring device, which comprises: a bracket, the bracket is provided with a continuous perforation in the center, and a plurality of flaps are arranged around the through hole, and the bracket is provided with an accommodating space under the through hole, and a test can be placed a positioning plate, the positioning plate is placed on the bracket around the through hole, and abuts against each of the blocking pieces on the bracket, so that when the positioning plate is placed on the bracket, Displacement and sliding; one side of the positioning plate is provided with an opening, and a baffle groove is respectively disposed at the bottom of the positioning plate on both sides of the opening; the positioning plate can fix the position of a thin tube sampler, and the thin tube is fixed The sampler is aligned with the test body mold; a baffle covering the through hole and slidably disposed in each of the baffle slots of the positioning plate; a pressurizing cap, the press cap The sleeve is placed on the thin tube sampler; by the above configuration, the thin tube sampler equipped with a soil sample body is placed on the baffle plate, and the pressure cap is placed, and then the baffle plate is placed Positioning on the edge of the opening of the positioning plate, so that the edge of the baffle is flattened to the positioning plate, Pushing the baffle into the baffle slot and aligning the through hole, and finally removing the baffle from the baffle slot, aligning the thin tube sampler with the test piece mold, and then adding the baffle At the top of the pressure cap, pneumatic pressure is applied to the thin tube sampler, and the soil sample in the thin tube sampler is moved by the air pressure to enter the test piece mold below. A compressed air top earther of the weak soil according to claim 1, wherein the baffle shape is a convex shape.