CN-224216476-U - Rock sample single-sided tensile shear test device

CN224216476UCN 224216476 UCN224216476 UCN 224216476UCN-224216476-U

Abstract

The utility model discloses a single-sided tensile shear test device for a rock sample, which comprises a tensile stress applying device, a shear stress applying device and a supporting buffer device, wherein the tensile stress applying device comprises a pressed top plate, a U-shaped force transmission rod piece and a bearing platform plate, the shear stress applying device comprises a buffer cushion layer, a sliding rail clamping groove, a U-shaped supporting sleeve piece and a supporting bottom plate, and the supporting buffer device comprises the buffer cushion layer, the sliding rail clamping groove, the U-shaped supporting sleeve piece and the supporting bottom plate.

Inventors

LIN YONGPENG
LIU HAO
CHEN CHUANG
YANG XUXU
ZHANG QIANYU
LI CHUNMENG

Assignees

山东科技大学

Dates

Publication Date: 20260508
Application Date: 20241220

Claims (4)

1. The single-sided tensile shear test device for the rock sample is characterized by comprising a tensile stress applying device, a shear stress applying device and a supporting buffer device; The tensile stress applying device comprises a pressed top plate (2), a U-shaped force transfer rod piece (4) and a bearing platform plate (9), wherein the pressed top plate (2) is connected with the U-shaped force transfer rod piece (4) through cementing, and the U-shaped force transfer rod piece (4) is connected with the bearing platform plate (9) through cementing; The supporting buffer device comprises a buffer cushion layer (1), a sliding rail clamping groove (3), a U-shaped supporting sleeve (8) and a supporting bottom plate (10), wherein the buffer cushion layer (1) is connected with the U-shaped supporting sleeve (8) through cementing, the sliding rail clamping groove (3) is connected with the U-shaped supporting sleeve (8) through welding, and the U-shaped supporting sleeve (8) is connected with the supporting bottom plate (10) through welding; The shearing stress applying device comprises an I-shaped sliding rail (5), a rock sample fixing upper sleeve member (6) and a rock sample fixing lower sleeve member (7), wherein the I-shaped sliding rail (5) is in sliding connection with the sliding rail clamping groove (3), and the rock sample fixing upper sleeve member (6) and the rock sample fixing lower sleeve member (7) are connected with a bearing platform plate (9) through staggered extrusion of the I-shaped sliding rail (5).
2. The single-sided tensile shear test device for rock samples is characterized in that the buffer cushion layer (1) is glued with a U-shaped supporting sleeve (8) through high-strength structural adhesive, the U-shaped force transmission rod piece (4) is connected with a pressed top plate (2) and a bearing platform plate (9) through welding, the U-shaped supporting sleeve (8) is connected with a supporting bottom plate (10) and a sliding rail clamping groove (3) through welding, the sliding rail clamping groove (3) is connected with an I-shaped sliding rail (5) through sliding, the U-shaped supporting sleeve (8) is connected with the U-shaped force transmission rod piece (4) through sliding, a cuboid rock sample (11) is used for a test block for tensile shear test, the U-shaped force transmission rod piece (5) and the bearing platform plate (9) are glued and connected through high-strength structural adhesive, and the rock sample fixing upper sleeve (6) and the rock sample fixing lower sleeve (7) are sleeved in the cuboid rock sample (11) through reserved square holes and are in extrusion contact with the bearing platform plate (9) through the I-shaped sliding rail (5).
3. The single-sided tensile shear test device for a rock sample according to claim 1, wherein the single-sided tensile shear test device for the rock sample is made of excellent steel.
4. The single-sided tensile shear test device for the rock sample according to claim 1, wherein the single-sided tensile shear test device for the rock sample is treated by adopting an antirust process.

Description

Rock sample single-sided tensile shear test device Technical Field The utility model relates to the technical field of rock sample pull-shear damage tests, in particular to a rock sample single-sided pull-shear test device. Background Rock pull shear failure is critical in the geotechnical engineering field. In underground works, such as tunnel excavation, surrounding rock is subjected to complex stresses. When the stress state is in a combined tensile and shear condition, the rock may be broken by pulling and shearing. Such failure modes often occur on rock slopes, side walls of underground chambers, etc. Traditional analysis methods tend to focus on single tensile or shearing damage, and less research is conducted on tensile-shearing composite damage which is closer to the actual working condition, and the damage behavior of the rock under the action of tensile shearing is difficult to study due to the high cost and the technical deficiency of the test method and the non-uniformity and complexity of the rock material. For this reason, it is necessary to invent a rock sample single-sided tensile shear test device. Disclosure of Invention The technical problem to be solved by the utility model is to overcome the technical defects. In order to solve the problems, the technical scheme is that the single-sided pull-shear test device for the rock sample comprises a buffer cushion layer, a compressed top plate, a sliding rail clamping groove, a U-shaped force transmission rod piece, an I-shaped sliding rail, an upper rock sample fixing sleeve piece, a lower rock sample fixing sleeve piece, a U-shaped supporting sleeve piece, a bearing plate, a supporting bottom plate and a cuboid rock sample. The tensile stress applying device comprises a pressed top plate, a U-shaped force transfer rod piece and a bearing platform plate, wherein the pressed top plate is connected with the U-shaped force transfer rod piece through cementing, and the U-shaped force transfer rod piece is connected with the bearing platform plate through cementing and is used for applying tensile stress to a cuboid rock sample in a test. The supporting buffer device comprises a buffer cushion layer, a sliding rail clamping groove, a U-shaped supporting sleeve and a supporting bottom plate, wherein the buffer cushion layer is connected with the U-shaped supporting sleeve through cementing, the sliding rail clamping groove is connected with the U-shaped supporting sleeve through welding, and the U-shaped supporting sleeve is connected with the supporting bottom plate through welding so as to reduce the damage of the device caused by direct collision of the pressed top plate and the U-shaped supporting sleeve when the cuboid sample is damaged. The shearing stress applying device comprises an I-shaped sliding rail, a rock sample fixing upper sleeve member and a rock sample fixing lower sleeve member, wherein the I-shaped sliding rail is in sliding connection with a sliding rail clamping groove, the rock sample fixing upper sleeve member is connected with the rock sample fixing lower sleeve member through staggered extrusion of the I-shaped sliding rail and a bearing platform plate, and the shearing stress applying device is used for applying shearing stress borne by a cuboid rock sample in a test. The vertical post in both sides of U-shaped support external member is hollow design and the outside of post is closed design, the opening of certain length is left to its inboard below, with U-shaped biography power member, pressurized roof and cushion cap welding, U-shaped support external member, supporting baseplate and slide rail draw-in groove welding, it inserts U-shaped biography power member in the U-shaped support external member adoption through reserving hollow opening, U-shaped support external member passes through sliding connection with U-shaped biography power member, with pressurized roof and U-shaped biography power member welding, supporting baseplate and U-shaped support external member welding, make pressurized roof support on the cushion bed course under the effect of dead weight, the cushion bed course passes through high strength structural adhesive and the glued of U-shaped support external member, the cushion bed course adopts rubber materials preparation, cuboid rock sample destruction when alleviateed the experiment, pressurized roof and the device damage that U-shaped support external member direct collision produced, with the high strength structural adhesive is paintd to the upper surface of platen, place cuboid rock sample on the bearing platen upper surface and make it with cushion cap plate, fixed lower external member, rock sample fixed upper portion is through reserving hole from down to upward cover on the cuboid rock sample, slide rail draw-in place the upper surface of cuboid rock sample, the glued upper surface is realized the glued with the cuboid upper surface of cuboid upper surface and the upper surface of cuboid i