CN205237867U

CN205237867U - A clamping device for making run through coarse crack test piece

Info

Publication number: CN205237867U
Application number: CN201521037781.8U
Authority: CN
Inventors: 姜宝凤; 贺广良; 方鹏飞
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2016-05-18
Anticipated expiration: 2025-12-15

Abstract

The utility model provides a clamping device for making run through coarse crack test piece, by anchor clamps, it constitutes with lower bearing plate to go up the bearing plate, wherein, anchor clamps include the anchor clamps seat, the hand wheel, centre gripping screw and dovetail plate, be equipped with dovetail plate above the anchor clamps seat, hand wheel and centre gripping screw, dovetail plate passes through the inside drilling depth of hand wheel, be used for the fixed bearing plate of going up, set up a rectangle recess in the anchor clamps seat, be used for placing down the bearing plate, go up the bearing plate, set up the arc recess down in the bearing plate respectively, arc recess bottom sets up the V type groove that can place thin ironbar, put into anchor clamps with the test piece, make thin ironbar aim at the straight line that the test piece tip paralleled to the axis, after the alignment is confirmed, fasten the test piece with the centre gripping screw, place the device on compression testing machine, when compression testing machine produces stress, loosen the centre gripping screw, continue the pressurization, can have the test piece that runs through the crack roughly, the utility model discloses novel structure, the easy grasp easy and simple to handle, the security is high, and the success rate is high.

Description

A kind of for making the clamping device that runs through coarse crack test specimen

Technical field

The utility model relates to civil engineering Rock Mechanics Test And field, a kind ofly specifically forms for the center splitting of cylinder test specimen a kind of clamping device that runs through coarse crack.

Background technology

Along with China drops in a large number to metro construction, make subway tunnel construction enter the gold period of high speed development, also some insoluble technical topic---rock crannies of raising difficult questions for discussion have been there are simultaneously, as everyone knows, rock mass is by sillar and structural plane (joint, crack, fault plane) composition, in rock mass, exist numerous cracks and crack coarse, bring potential safety hazard to constructing tunnel waterproof and later stage operation, therefore, need badly and carry out, solve the basic research work about crack rock mechanical property and failure mechanism thereof, but due to the complicated operation of field trial, length expends time in, cost is higher, the effects limit such as test effect is not obvious, the Related Experimental Study of crack rock roughness is undertaken by laboratory test mostly at present, in the rock mass of research crack roughness, for manufacture of intraocular runs through coarse crack test specimen, adopt improved Brazilian diametral compression test method to obtain and run through coarse crack test specimen, the present invention is based on the general principle of Brazilian splitting, for carrying out accurately the splitting of test specimen center in traditional splitting, test effect is undesirable, the problems such as mortality height, design a kind of new test fixture device, can produce the test specimen that manually runs through coarse crack.

Summary of the invention

In order to overcome the deficiency existing in traditional splitting, it is a kind of for making the clamping device that runs through coarse crack test specimen that the utility model provides, its easy grasp simple to operate, and safe, repeatable utilization rate is high, and success rate is high.

It is a kind of for making the clamping device that runs through coarse crack test specimen that the utility model provides, by fixture, upper bearing plate and lower bearing plate composition, wherein, fixture comprises clamping fixture seat, hand wheel, clamp screws and coattail board, above clamping fixture seat, be provided with coattail board, hand wheel and clamp screws, coattail board is by the inside drilling depth of hand wheel, for fixing upper bearing plate, in clamping fixture seat, offer a rectangular recess, be used for placing lower bearing plate, upper bearing plate, in lower bearing plate, arc groove is set respectively, arc groove bottom arranges the V-type groove that can place thin iron bar, test specimen is put into fixture, make thin iron bar aim at the straight line that test piece end parallels to the axis, after aligning is determined, carry out fastening to test specimen by clamp screws, this device is placed on pressure testing machine, in the time that pressure testing machine produces stress, clamp screws is unclamped, continue pressurization, can obtain the test specimen that runs through crack with coarse.

Compared with prior art, the utility model is a kind of for the advantage of making the clamping device that runs through coarse crack test specimen is.

(1) problem that has overcome traditional splitting and cannot carry out accurately the splitting of test specimen center, increases substantially success rate.

(2) the coarse crack test specimen that runs through of making has well reduced the stochastic behaviour in Test in Situ crack, makes experimental study have more significance of scientific research.

(3) this device is easy and simple to handle, easily grasps, safe and reliable.

Brief description of the drawings

Fig. 1 is front view of the present utility model.

Fig. 2 is left view of the present utility model.

In figure: 1-fixture, the upper bearing plate of 2-, bearing plate under 3-, the thin steel bar of 4-, 5-V type groove, 6-test specimen, 7-clamp screws, 8-hand wheel, 9-coattail board, 10-clamping fixture seat.

Detailed description of the invention

It is a kind of for making the clamping device that runs through coarse crack test specimen that the utility model provides, and for technical scheme that the utility model is realized, reach object and effect characteristic is more explicit, below in conjunction with accompanying drawing, its detailed description of the invention is further elaborated.

As shown in Figure 1, it is a kind of for making the clamping device that runs through coarse crack test specimen that the utility model provides, by fixture 1, upper bearing plate 2 and lower bearing plate 3 form, wherein, fixture 1 comprises clamping fixture seat 10, hand wheel 8, clamp screws 7 and coattail board 9, clamping fixture seat 10 is provided with coattail board 9 above, hand wheel 8 and clamp screws 7, coattail board 9 is by the inside drilling depth of hand wheel 8, for fixing upper bearing plate 2, in clamping fixture seat 10, offer a rectangular recess, be used for placing lower bearing plate 3, upper bearing plate 2, the interior arc groove that arranges respectively of lower bearing plate 3, arc groove bottom arranges the V-type groove 5 that can place thin iron bar 4, test specimen 6 is put into fixture 1, 6 of test specimens are to be undertaken fastening by clamp screws 7, this device is placed on pressure testing machine, in the time that pressure testing machine produces stress, clamp screws is unclamped, continue pressurization, can obtain the test specimen that runs through crack with coarse.

The mode that specifically performs of the present utility model is, at the two ends of test specimen end face diameter, respectively draw a straight line paralleling to the axis as loading baseline, test specimen 6 is put into fixture 1, allow the thin steel bar being placed in V-type groove 5 aim at loading baseline, fixedly secure by two ends clamp screws 7.

Claims

1. one kind for making the clamping device that runs through coarse crack test specimen, by fixture, upper bearing plate and lower bearing plate composition, wherein, fixture comprises clamping fixture seat, hand wheel, clamp screws and coattail board, above clamping fixture seat, be provided with coattail board, hand wheel and clamp screws, coattail board is by the inside drilling depth of hand wheel, for fixing upper bearing plate, in clamping fixture seat, offer a rectangular recess, be used for placing lower bearing plate, upper bearing plate, in lower bearing plate, arc groove is set respectively, arc groove bottom arranges the V-type groove that can place thin iron bar, test specimen is put into fixture, test specimen is to be undertaken fastening by clamp screws, this device is placed on pressure testing machine, in the time that pressure testing machine produces stress, clamp screws is unclamped, continue pressurization, can obtain the test specimen that runs through crack with coarse.