CN205384196U - A multi -functional shear box for similar material structure face direct shear test - Google Patents

Abstract

The utility model discloses a multi -functional shear box for similar material structure face direct shear test to the structural plane problem that extensively exists, has designed a device that is applicable to test block molding, the formation of different thickness structural plane and structural plane direct shear test among the geomechanical model test. This multi -functional shear box is including lower box, side direction baffle, shearing ring, lug, handle, last box and bearing plate, lower box is fixed in universal tester, and at the test block molding in -process, the side direction baffle can prevent test block along the vertical unevenness strip of quarto mould junction production, also easily form removal. The shearing ring has a plurality of thickness, and the material is organic glass. It is the protective sheath of test block to go up the box, and the bearing plate is used for transmitting the load. This shear box has solved processes such as specimen molding and structural plane direct shear test simultaneously, both can generate the test block that meets the requirements fast, can study the mechanics action of cohering the material under the different thickness again, helps cohering among the model test selecing of material.

Description

A kind of multi-functional shear box for analog material structure face direct shear test

Technical field

This utility model relates to geomechanical model test and rock mechanics routine test, is mainly used in making the analog material standard specimen that there is structural plane and measuring the Shear Strength Index in its internal structure face (binding material) and make analog material standard specimen and measure the Shear Strength Index of this material.

Background technology

The important means that geomechanical model test is analyzed as all kinds of geological disaster study mechanism and geotechnical engineering design, by building the similarity relation between prototype and model, to realize the apparent phenomenon and inherent mechanism approximate real reflection in model test of prototype.Analog material whether can the physico mechanical characteristic of the true rock mass of approximate simulation, the design implementation of model test is played vital effect.In view of failure by shear pattern ubiquitous in rock mass can arise from intact rock or no-continuous discontinuity, need when therefore carrying out geomechanical model test similar Design to consider whether the material of simulation intact rock and the binding material in model configuration face failure by shear can occur simultaneously.And judge that whether whether above-mentioned main requirement of similarity meets the Shear Strength Index that most straightforward approach is the analog material being measured simulation intact rock and model configuration face by direct shear test, analyze its value with meeting similarity coefficient relation between prototype index.In addition; consider that the failure by shear occurred in rock mass would generally form slip band along its internal weak structural face or interlayer, before carrying out model test design, be therefore also necessary to the shear property adopting laboratory test means research to have certain thickness binding material.At present, the preparation of analog material and test usually two relatively independent processes in geomechanical model test research, wherein the preparation of analog material adopts compaction moulding, the mensuration of Shear Strength Index then uses for reference rock mechanics conventional methods, and fails in use procedure to consider the impact on its shear property of the binding material thickness.

Utility model content

Analog material structure face shear history relate to the processes such as analog material test block compacting, structural plane making, structural plane staight scissors, and in existing model test, the device of complete set can not concentrate this series of problems of solution.Therefore, analog material structure face complex manufacturing process, direct shear test efficiency is very low.For Problems existing, this utility model provides a kind of shear box that can simultaneously meet Similar Material of Rockmass joint straight shear test test material preparation and test enforcement.

The technical solution of the utility model:

A kind of multi-functional shear box for analog material structure face direct shear test, including lower box, lateral baffle plate, shearing ring, projection, handle, upper box and bearing plate；

Lower box is four molds, is fixed by four molds by bolt, and lower box is fixed on the chassis of universal testing machine in test specimen compacting and test specimen shear history, and lower box inside circumference places lateral baffle plate, the form removal process after facilitating test block to suppress；In test specimen pressing process, lower box and lower box are equipped with the groove matched with projection；

Upper box is identical with the shape of lower box, and bearing plate is placed at its top, in order to transmit the vertical load that forcing press applies；Upper box both sides arrange handle, facilitate form removal to operate；In test specimen pressing process, upper box is by the groove occlusal contact condition of projection with lower box；

Shearing ring is made by lucite, which is provided with handle, and shearing ring is placed between box and lower box, for analog material structure face direct shear test；By controlling the thickness of shearing ring, adjust structural plane thickness, measure the mechanical index in different-thickness analog material structure face.

The beneficial effects of the utility model: this multi-functional box can realize sample preparation and the test enforcement of Similar Material of Rockmass direct shear test simultaneously, and the shear property of different thickness binding material can be studied, these advantages are that existing Similar Material of Rockmass testing equipment does not have.Utilize four molds can the feature of quick despatch, improve the efficiency of test block forming；The layout of lateral baffle plate, it is ensured that the flat smooth of surface of test piece, is also easy to the demoulding；Shearing ring adopts lucite, it is achieved that the visualization of binding material detrusion process.

Accompanying drawing explanation

Fig. 1 is the front schematic view for Similar Material of Rockmass test block forming described in the utility model.

Fig. 2 is the front schematic view for complete similar material test block forming described in the utility model.

Fig. 3 is the front schematic view for analog material structure face direct shear test described in the utility model.

Fig. 4 is the front schematic view for complete similar material test block direct shear test described in the utility model.

In figure: 1 time box；2 shearing rings；Box on 3；4 handles；5 lateral baffle plates；6 bearing plates；7 projections；

Nut bottom 8；9 four die sinking nuts；10 bulk solid analog materials；11 test blocks；12 binding materials.

Detailed description of the invention

For making the purpose of this utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of this utility model, rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection.

As shown in Figures 1 to 4, this kind of multi-functional shear box for analog material structure face direct shear test, including lower box 1, described lower box 1 is provided with the groove placing lateral baffle plate 5 and connection bump 7, lower box 1 is four die sinkings, is bolted as a whole, and material is galvanized iron sheet.Shearing ring 2, has multiple thickness, can control structural plane thickness, is made up of lucite, transparent visual.Upper box 3, is provided with the groove of connection bump 7.Upper box 3 has bearing plate 6, transmits vertical load.

(1) Fig. 1 illustrates the Similar Material of Rockmass test block forming process containing structural plane: be first placed on the groove of four molds by lateral baffle plate 5, then four molds are securely fixed by screw, more lower box is fixed on the chassis of universal testing machine in test specimen compacting and test specimen shear history；Utilize the occluding relation between flange 7 and groove, fixing above box and lower box, place the bulk solid analog material 10 prepared, set up bearing plate 6；Controlling forcing press and come downwards to bottom bearing plate 6 so that it is be positioned on same level line with lower box 1 top, so highly the test specimen for 5cm has been suppressed.

Test block knockout course: control forcing press unloading, utilize handle 4 to shed box 3, unclamp lower box 1 four and open the connecting bolt of parts, lower box 1 is taken off.Beaing gently with hand hammer and have the lateral baffle plate 5 necessarily contacted with test block, baffle plate 5 can skid off along surface of test piece, is kept completely separate four pieces of lateral baffle plates 5, can obtain smooth surface, be of a size of the test specimen of 5cm.

Take two 5cm standard specimens suppressed, one of them is put in lower box 1, then dispose shearing ring 2, in shearing ring 2, place binding material.Buckling box 3, place another block test specimen, after standing the regular hour, the preparation of the Similar Material of Rockmass test block containing structural plane completes.

(2) Fig. 2 illustrates rockmass analog material test block forming process: being placed on the groove of lower box 1 by lateral baffle plate 5, the lower box 1 then opened four is securely fixed by screw, then is fixed on forcing press base plate by lower box 1；Utilize the occluding relation between projection 7 and groove, fix box 3 and lower box 1；Again box on another 3 is put, pour the bulk solid analog material 10 configured into, set up bearing plate 6, control forcing press and come downwards to bottom bearing plate 6, the top of the upper box 3 contacted with lower box 1 is positioned on same level line, and so highly the rockmass analog material test specimen for 10cm has been suppressed.

(3) Fig. 3 illustrates the process of Similar Material of Rockmass joint straight shear test: be placed in shear box by the analog material test block containing structural plane prepared described in step (1), whole device is placed on forcing press base plate, fixing lower box 1, certain vertical force is first applied by forcing press, apply side force again, meanwhile, side force and lateral displacement time course data are acquired by displacement transducer and force transducer；Variation vertical force size, can obtain structural plane shear load size under different pressures, thus can calculate Similar Material of Rockmass structural plane physical and mechanical parameter.Shearing ring 2 is made up of lucite, and in whole shear history, the morphological change characteristics of structural plane is it is observed that this contributes to our understanding to mechanical property of structural plane.Shearing ring has multiple thickness, and variation shearing ring thickness can analyze the strength characteristics of different-thickness structural plane.

(4) Fig. 4 illustrates the process of rockmass analog material staight scissors: the complete test block that height is 10cm that will prepare described in step (2), it is positioned in lower box 1, fixing lower box 1 is in forcing press base plate, lay certain thickness shearing ring 2, putting box 3 again, all the other steps are with (3) described process.

Claims (1)

1. the multi-functional shear box for analog material structure face direct shear test, it is characterised in that this multi-functional shear box includes lower box, lateral baffle plate, shearing ring, projection, handle, upper box and bearing plate；

Lower box is four molds, is fixed by four molds by bolt, and lower box is fixed on the chassis of universal testing machine in test specimen compacting and test specimen shear history, and lower box inside circumference places lateral baffle plate, the form removal process after facilitating test specimen to suppress；In test specimen pressing process, lower box is provided with the groove that the projection with upper box matches；

Upper box is identical with the shape of lower box, and bearing plate is placed at its top, in order to transmit the vertical load that forcing press applies；Upper box both sides arrange handle, facilitate form removal to operate；In test specimen pressing process, upper box is provided with projection, and in forming process, upper box is by the groove occlusal contact condition of projection with lower box；

Shearing ring is made by lucite, which is provided with handle, and shearing ring is placed between box and lower box, for analog material structure face direct shear test；By controlling the thickness of shearing ring, adjust structural plane thickness, measure the mechanical index in different-thickness analog material structure face.