CN214200903U

CN214200903U - Rock core sample preparation mold for geomechanical model test

Info

Publication number: CN214200903U
Application number: CN202022490065.2U
Authority: CN
Inventors: 赵想利; 黄鹏; 周鑫; 向子林
Original assignee: China Three Gorges University CTGU
Current assignee: China Three Gorges University CTGU
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-09-14
Anticipated expiration: 2030-11-02

Abstract

The utility model discloses a be used for experimental core system appearance mould of geomechanical model, including interior mould pipe, interior mould pipe is the orange-peel structure, including mould outside of tubes side cover be equipped with outer mould pipe, be equipped with a plurality of fasteners on outer mould pipe, including mould nose portion and bottom all be equipped with the bearing head, the overhead cover of bearing in the bottom is equipped with a plurality of bearing rings. The utility model provides a connect untight problem between the multi-disc mould pipe, the rock specimen rule that makes, terminal surface and highly accord with the experimental requirement, the combination degree between the material is high, and hardness is higher.

Description

Rock core sample preparation mold for geomechanical model test

Technical Field

The utility model relates to an experimental facilities field specifically indicates a be used for geomechanical model test core system appearance mould.

Background

In the engineering technical fields of excavation, supporting and the like of rock slopes, a standard cylindrical rock core with the diameter of 50mm and the height of 100mm is usually required to be made of similar materials before a geomechanical model test to carry out a single-axis and three-axis compression test, a Brazilian splitting test and a shear strength test, so that the compression strength, the tensile strength and the shear strength of the artificial rock core are obtained, and a strength reference value is provided for the subsequent geomechanical model test work.

The existing artificial rock core sample preparation molds are generally of two types, one type is a disposable plastic mold mainly made of PVC materials, cover plates are not arranged at two ends of the mold, manual bottom sealing is needed, the mold stripping and sampling process after the rock core is formed is time-consuming and labor-consuming, and the sample preparation efficiency is extremely low; the other type is a recyclable mold mainly made of metal materials, and the existing metal mold generally comprises a multi-section mold tube, a base and a connecting part. When the sample is prepared, because the connection between the multi-petal metal die tubes is not tight, a large gap exists, the sample overflows from the gap, the prepared rock sample is irregular, the end face and the height cannot meet the experimental requirements, the combination degree between materials is not high, and the hardness is low.

Therefore, it is necessary to design a core sample preparation mold for geomechanical model test to solve the above problems.

Disclosure of Invention

An object of the utility model is to overcome the aforesaid not enough, provide a be used for geomechanical model test core system appearance mould, solved and connected untight problem between the multilobe mould pipe, the rock specimen rule that makes, terminal surface and highly accord with the experimental requirement, the combination degree between the material is high, and hardness is higher.

The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides a be used for experimental core system appearance mould of geomechanical model, includes interior mould pipe, interior mould pipe is the multilobe structure, and the outside cover of mould outside of tubes is equipped with outer mould pipe including, is equipped with a plurality of fasteners on outer mould pipe, all is equipped with the bearing head including mould nose portion and bottom, overlaps on the bearing head of bottom to be equipped with a plurality of bearing rings.

Preferably, the fastener is a bolt, a screw hole matched with the bolt is formed in the outer mold pipe, and the bolt penetrates through the screw hole and abuts against the inner mold pipe.

Preferably, the inner mould tube consists of two semicircular moulds.

Preferably, the number of the fasteners is four, and the included angle between two adjacent fasteners is 90 degrees.

Preferably, the pressure-bearing head comprises a first pressure-bearing body and a second pressure-bearing body, the second pressure-bearing body is a cylinder, and the outer diameter of the second pressure-bearing body is the same as the inner diameter of the inner die tube.

Preferably, the inner diameter and the outer diameter of the pressure-bearing ring are the same as the inner mould tube.

The utility model has the advantages that: the utility model provides a connect untight problem between the multi-disc mould pipe, the rock specimen rule that makes, terminal surface and highly accord with the experimental requirement, the combination degree between the material is high, and hardness is higher.

Drawings

FIG. 1 is a schematic structural diagram of a core sample preparation mold for geomechanical model testing;

FIG. 2 is a front view of a core sample preparation mold for geomechanical model testing;

FIG. 3 is a schematic cross-sectional structure diagram of a core sample preparation mold for geomechanical model testing;

in the figure, an inner mould tube 1, an outer mould tube 2, a fastener 3, a bearing head 4, a first bearing body 4.1, a second bearing body 4.2 and a bearing ring 5.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in fig. 1 to 3, a be used for geomechanical model test core system appearance mould, including interior mould pipe 1, interior mould pipe 1 is the multilobe structure, and the cover is equipped with outer mould pipe 2 in the mould pipe 1 outside including, is equipped with a plurality of fasteners 3 on outer mould pipe 2, all is equipped with pressure-bearing head 4 at mould pipe 1 top and bottom including, and the cover is equipped with a plurality of pressure-bearing rings 5 on the pressure-bearing head 4 of bottom. The inner diameter of outer mould pipe 2 slightly is greater than 1 external diameter of inner mould pipe, fastens through fastener 3, and the drawing of patterns is taken out from outer mould pipe 2 to inner mould pipe 1 of being convenient for after the core preparation is accomplished.

Preferably, the fastening member 3 is a bolt, a screw hole matched with the bolt is formed in the outer mold tube 2, and the bolt penetrates through the screw hole and abuts against the inner mold tube 1. The arrangement is simple in structure and convenient to operate.

Preferably, the inner mould tube 1 consists of two semicircular moulds. The arrangement is simple in structure and convenient to operate.

Preferably, the number of the fastening pieces 3 is four, and the included angle between two adjacent fastening pieces 3 is 90 degrees, so that the two semicircular molds can be locked and fixed conveniently.

Preferably, the pressure-bearing head 4 comprises a first pressure-bearing body 4.1 and a second pressure-bearing body 4.2, the second pressure-bearing body 4.2 is a cylinder, and the outer diameter of the second pressure-bearing body 4.2 is the same as the inner diameter of the inner mould tube 1.

Preferably, the inner and outer diameters of the pressure ring 5 are the same as the inner mould tube 1. Such an arrangement is more stable and more convenient to operate.

The working principle of the embodiment is as follows: when in use, the bearing rings 5 are assembled after selecting a proper number according to the length of the core to be manufactured.

During assembly, the pressure-bearing head 4 at the bottom is placed, the required pressure-bearing rings 5 are all placed on the pressure-bearing head 4, then the inner mold pipe 1 is folded and placed on the pressure-bearing head 4, and the outer mold pipe 2 is sleeved on the inner mold pipe and fixed through the fastening piece 3.

During sample preparation, a proper amount of soil sample is added into the inner die pipe 1, the pressure-bearing head 4 at the top is placed, and then pressurization and compaction are carried out.

The utility model provides a connect untight problem between the multi-disc mould pipe, the rock specimen rule that makes, terminal surface and highly accord with the experimental requirement, the combination degree between the material is high, and hardness is higher.

The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.

Claims

1. The utility model provides a be used for geomechanical model test core system appearance mould, includes interior mould pipe (1), its characterized in that: interior mould pipe (1) is the multi-disc structure, and the cover is equipped with outer mould pipe (2) in mould pipe (1) outside including, is equipped with a plurality of fasteners (3) on outer mould pipe (2), all is equipped with bearing head (4) at inner mould pipe (1) top and bottom, overlaps on bearing head (4) of bottom to be equipped with a plurality of bearing rings (5).

2. The core sample preparation mold for the geomechanical model test according to claim 1, wherein: the fastener (3) is a bolt, a screw hole matched with the bolt is formed in the outer die pipe (2), and the bolt penetrates through the screw hole and abuts against the inner die pipe (1).

3. The core sample preparation mold for the geomechanical model test according to claim 1, wherein: the inner mould tube (1) consists of two semicircular moulds.

4. The core sample preparation mold for the geomechanical model test according to claim 1, wherein: the number of the fasteners (3) is four, and an included angle between two adjacent fasteners (3) is 90 degrees.

5. The core sample preparation mold for the geomechanical model test according to claim 1, wherein: the pressure-bearing head (4) comprises a first pressure-bearing body (4.1) and a second pressure-bearing body (4.2), the second pressure-bearing body (4.2) is a cylinder, and the outer diameter of the second pressure-bearing body (4.2) is the same as the inner diameter of the inner die pipe (1).

6. The core sample preparation mold for the geomechanical model test according to claim 1, wherein: the inner diameter and the outer diameter of the pressure bearing ring (5) are the same as those of the inner die pipe (1).