CN209878506U

CN209878506U - Bulldozing device for direct shearing test

Info

Publication number: CN209878506U
Application number: CN201920562678.7U
Authority: CN
Inventors: 卓莉; 肖明砾; 刘怀忠; 谢红强; 何江达
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2019-12-31
Anticipated expiration: 2029-04-23

Abstract

The utility model discloses a bulldozing device and direct shear apparatus shear box for direct shear test belongs to civil engineering geotechnical test field. The bulldozing device for the direct shear test comprises a push rod and a positioning barrel with a cavity, wherein a through hole for the push rod to pass through is formed in the positioning barrel, a handle part is arranged at one end, extending out of the positioning barrel, of the push rod, a spring is sleeved on the push rod between the handle part and the positioning barrel, a push plate is arranged at one end, located in the cavity, of the push rod, and the cross section size of the push plate is smaller than that of the cavity; one end of the positioning barrel, which is far away from the handle part, is provided with a positioning part matched with the top of the upper box of the shearing box of the direct shear apparatus.

Description

Bulldozing device for direct shearing test

Technical Field

The utility model relates to a civil engineering geotechnical test field, concretely relates to direct shear test is with bulldozing device and direct shear apparatus shearing box.

Background

The direct soil shear test is one of the main test methods for measuring the shear strength index of soil. As shown in fig. 1, the direct shear test is generally performed by compacting a sample (pressing a certain amount of soil into a ring cutter 5 having a fixed volume) and pushing a soil sample 15 in the ring cutter 5 into a shear box. When bulldozing, the knife edge of the cutting ring 5 is upwards buckled in a groove of an upper box 6 of the shearing box of the direct shear apparatus, the permeable stone 4 is placed on the soil sample 15, and the permeable stone 4 and the soil sample 15 in the cutting ring 5 are slowly pushed into a lower box 7 of the upper box 6 of the shearing box of the direct shear apparatus by thumbs of two hands. In the process of bulldozing, if the speed of bulldozing is not well controlled, the fingers can easily touch the edge of the cutting ring 5, so that the fingers are injured.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can avoid bulldozing the in-process finger touching cutting ring edge of a knife and unexpected injured bulldozing device for direct shear test.

In order to achieve the purpose of the invention, the utility model adopts the technical scheme that:

the bulldozing device for the direct shear test comprises a push rod and a positioning cylinder with a cavity, wherein a through hole for the push rod to pass through is formed in the positioning cylinder, a handle part is arranged at one end, extending out of the positioning cylinder, of the push rod, a spring is sleeved on the push rod between the handle part and the positioning cylinder, a push plate is arranged at one end, located in the cavity, of the push rod, and the cross section size of the push plate is smaller than that of the cavity; one end of the positioning barrel, which is far away from the handle part, is provided with a positioning part matched with the top of the upper box of the shearing box of the direct shear apparatus.

Further, the section of the push plate is circular.

Further, the outer part of the section of the positioning cylinder is square, and the inner contour of the section of the positioning cylinder is circular.

Further, the positioning part comprises a positioning groove which is arranged on the positioning cylinder and matched with the head part of the bolt at the top of the upper box.

Furthermore, the positioning part comprises an abutting clamping part which is arranged on the positioning cylinder and matched with the peripheral edge of the top of the upper box.

Further, lean on to be provided with on the block portion with the top edge complex first rubber ring of last box.

Further, a second rubber ring matched with the outer wall of the cutting ring of the direct shear apparatus cutting box is arranged on the inner wall of the cavity.

Furthermore, a third rubber ring matched with the outer wall of the push rod is arranged on the inner wall of the through hole.

The utility model has the advantages that:

under the condition of not changing the structure of the existing direct shear apparatus shearing box, the positioning barrel is arranged on the upper box of the direct shear apparatus shearing box by utilizing the matching of the positioning part and the top of the upper box. Then the push rod is manually pushed towards the upper box, so as to drive the push plate to move synchronously. When the bull-dozer contacts the permeable stone in the upper box, slowly push the lower box of direct shear appearance shearing box with the soil sample in permeable stone and the cutting ring to accomplish pushing of the permeable stone and the soil sample in the cutting ring.

In the bulldozing process, the positioning cylinder covers the cutting ring, so that the direct contact between a hand and the cutting edge of the cutting ring is avoided, and the finger is prevented from being injured accidentally. And the arrangement of the spring is helpful for slowing down the bulldozing process, and the soil body is prevented from being compressed due to too fast bulldozing, so that the accuracy of the test is ensured.

Drawings

FIG. 1 is a schematic front view of a direct shear box before dozing in a direct soil shear test related to the background art;

FIG. 2 is a schematic top view of a bulldozer for direct shear test according to the present embodiment;

FIG. 3 is an assembled view of FIG. 2 and FIG. 1;

FIG. 4 is a perspective view of FIG. 3;

FIG. 5 is a front view of the assembled components of FIGS. 2 and 1;

fig. 6 is a partial cross-sectional view of fig. 5.

Wherein, 1, a positioning cylinder; 2. a handle portion; 3. a spring; 4. a permeable stone; 5. cutting with a ring cutter; 6. putting the box on; 7. a box is lowered; 8. a bolt head; 9. a third rubber ring; 10. pushing the plate; 11. a second rubber ring; 12. a positioning groove; 13. a first rubber ring; 14. abutting against the clamping part; 15. and (6) sampling soil.

Detailed Description

The following detailed description of the present invention will be made with reference to the accompanying drawings so as to facilitate the understanding of the present invention by those skilled in the art. It should be understood that the embodiments described below are only some embodiments of the invention, and not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step, without departing from the spirit and scope of the present invention as defined and defined by the appended claims, belong to the protection scope of the present invention.

As shown in fig. 2 to 4, the bulldozing device for the direct shear test comprises a push rod and a positioning cylinder 1 with a cavity, wherein a through hole for the push rod to pass through is formed in the positioning cylinder 1, a handle part 2 is arranged at one end of the push rod extending out of the positioning cylinder 1, a spring 3 is sleeved on the push rod between the handle part 2 and the positioning cylinder 1, a push plate 10 is arranged at one end of the push rod in the cavity, and the cross section size of the push plate is smaller than that of the cavity; one end of the positioning cylinder 1, which is far away from the handle part 2, is provided with a positioning part matched with the top of an upper box 6 of the direct shear apparatus shearing box.

The vertical arrows in fig. 3 and 4 indicate the mounting direction of the dozer device for the direct shear test.

In practice, as shown in fig. 2, the push plate 10 of the present embodiment preferably has a circular cross section. The outside of the section of the positioning cylinder 1 is square, and the inner contour is circular. And the positioning part comprises a positioning groove 12 which is arranged on the positioning cylinder 1 and is matched with the bolt head 8 at the top of the upper box 6. The positioning of the positioning cylinder 1 is realized through the matching of the positioning groove 12 and the bolt head 8.

As shown in fig. 4 to 6, the positioning portion includes an abutting engagement portion 14 provided on the positioning cylinder 1 and engaged with the peripheral edge of the top of the upper case 6. The positioning of the positioning cylinder 1 is achieved by the interference engagement of the abutting engagement portion 14 with the peripheral edge of the top of the upper case 6. And the abutting clamping part 14 is provided with a first rubber ring 13 matched with the top edge of the upper box 6, so that the abutting clamping part 14 is contacted with the upper box 6 more tightly, and the positioning accuracy is improved.

In another embodiment, the positioning portion includes a positioning groove 12 and an abutting engagement portion 14 to enhance the stability of positioning.

As shown in fig. 4 and 6, the inner wall of the cavity is provided with a second rubber ring 11 which is matched with the outer wall of the cutting ring 5 of the shearing box of the direct shear apparatus, so that the positioning cylinder 1 is in closer contact with the cutting ring 5, and the positioning accuracy is improved.

As shown in fig. 4 and 6, a third rubber ring 9 matched with the outer wall of the push rod is arranged on the inner wall of the through hole, so that the push rod is in closer contact with the positioning cylinder 1, and the positioning accuracy is improved.

Claims

1. The bulldozing device for the direct shear test is characterized by comprising a push rod and a positioning cylinder (1) with a cavity, wherein a through hole for the push rod to pass through is formed in the positioning cylinder (1), a handle part (2) is arranged at one end, extending out of the positioning cylinder (1), of the push rod, a spring (3) is sleeved on the push rod between the handle part (2) and the positioning cylinder (1), a push plate (10) is arranged at one end, located in the cavity, of the push rod, and the section size of the push plate is smaller than that of the cavity; one end of the positioning cylinder (1) far away from the handle part (2) is provided with a positioning part matched with the top of an upper box (6) of the shearing box of the direct shear apparatus.

2. The dozing device for a direct shear test as claimed in claim 1, wherein the section of the push plate (10) is circular.

3. The dozer device for direct shear test as claimed in claim 1, wherein the positioning cylinder (1) has a square outer section and a circular inner contour in cross section.

4. The dozing device for a direct shear test as claimed in claim 1, wherein the positioning part comprises a positioning groove (12) provided on the positioning cylinder (1) and engaged with a bolt head (8) at the top of the upper case (6).

5. The dozer device for a direct shear test as claimed in claim 1, wherein the positioning portion includes an abutting engagement portion (14) provided on the positioning cylinder (1) and engaged with a peripheral edge of a top portion of the upper case (6).

6. The dozer device for direct shear test as claimed in claim 5, wherein the abutting engagement portion (14) is provided with a first rubber ring (13) engaged with a top edge of the upper case (6).

7. A dozer device for direct shear testing as claimed in any one of claims 1-6 wherein the inner wall of the cavity is provided with a second rubber ring (11) engaging the outer wall of the ring cutter (5) of the shear box of the direct shear apparatus.

8. The device as claimed in claim 7, wherein a third rubber ring (9) is provided on the inner wall of the through hole to be engaged with the outer wall of the push rod.