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Rock mass test flexible oil cylinder, loading system and mounting method of loading system

A loading system and oil cylinder technology, applied in the field of geotechnical engineering, can solve the problems of difficult accurate measurement of load, troublesome production, short service life, etc., and achieve the effect of large size, not easy to burst and oil leakage, and long service life

Pending Publication Date: 2020-07-03
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure-bearing bladder needs to be flexible so that it can cooperate with the rock mass sample to deform, and at the same time, it must have a certain rigidity to apply a load of sufficient strength. Therefore, it is troublesome to manufacture and has a short service life. Generally, it can only be used once, and the applied load is difficult to accurately measure. , can only be converted by the equivalent area

Method used

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  • Rock mass test flexible oil cylinder, loading system and mounting method of loading system
  • Rock mass test flexible oil cylinder, loading system and mounting method of loading system
  • Rock mass test flexible oil cylinder, loading system and mounting method of loading system

Examples

Experimental program
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Effect test

example 1

[0069] Example 1. The field test uses a cylindrical rock mass sample

[0070] 1. Design shape

[0071] Such as image 3 with Figure 4 The figure shows an annular flexible oil cylinder, the inner steel frame 1b, the outer steel frame 1a and the pressure bearing oil bag 1c are all designed to be annular, and the bolt body 1e with the circular base passes through the inner steel frame 1b, the pressure bearing oil bag in sequence 1c and outer steel frame 1a, and then use gasket 1f and nut 1g to fix. The inner steel frame 1b and the pressure oil bag 1c form an oil chamber 1d, and the hydraulic oil is injected and drawn out through the hollow oil hole 1h of the bolt body 1e.

[0072] Such as Figure 5 An annular reaction force frame is provided as shown, and eight oil passage holes 2e are provided between the first frame 2a and the second frame 2b, the third frame 2c and the fourth frame 2d, and the oil passage holes 2e of the annular frame 2 and the annular The oil hole 1h of...

example 2

[0077] Example 2. The field test adopts cuboid rock mass sample

[0078] 1. Design shape

[0079] Such as Image 6 The figure shows a square flexible oil cylinder, the inner steel frame 1b, the outer steel frame 1a and the pressure oil bag 1c are all designed in a square shape, and the bolt body 1e with a circular base passes through the inner steel frame 1b, the pressure oil bag in sequence 1c and outer steel frame 1a, and then use gasket 1f and nut 1g to fix. The inner steel frame 1b and the pressure oil bag 1c form an oil chamber 1d, and the hydraulic oil is injected and drawn out through the hollow oil hole 1h of the bolt body 1e.

[0080] A square frame is provided, eight oil passage holes 2e are provided between the first frame 2a and the second frame 2b, the third frame 2c and the fourth frame 2d, the oil passage holes 2e of the square frame 2 and the oil holes of the square flexible cylinder 1h in the same position. Four symmetrical measuring holes 2f are provided ...

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Abstract

The invention provides a rock mass test flexible oil cylinder, a loading system and a mounting method of the loading system. The rock mass test flexible oil cylinder comprises an inner steel frame, anouter steel frame and a pressure-bearing oil bag arranged between the inner steel frame and the outer steel frame, wherein the inner steel frame and the outer steel frame are connected through a boltbody, the bolt body is internally provided with a hollow oil hole communicated with an oil cavity, hydraulic oil in the oil cavity is injected and led out through the hollow oil hole of the bolt body, and the pressure-bearing oil bag is manufactured through one-time demolding. The rock mass test flexible oil cylinder is used for being arranged on the periphery of a rock mass sample in a surrounding mode to conduct a flexible loading test. The pressure-bearing oil bag in the flexible oil cylinder is manufactured through one-time demolding, the peripheral frame of the pressure-bearing oil bag and the oiled side surface are welded after being clamped by the inner steel frame and the outer steel frame, so that the side surface facing the rock mass is weldless, the pressure-bearing oil bag isnot prone to burst and oil leakage when expanding and pressurizing, the service life is long, and high safety and reliability are achieved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a rock mass test flexible oil cylinder, a loading system and an installation method thereof. Background technique [0002] The triaxial test of rock mass is a test method that prepares specimens on site to simulate engineering action to apply external loads to rock mass, and then obtain the mechanical parameters of rock mass. It is an important means of geotechnical engineering investigation. Indoor rock mechanics experiments can use cuboid test blocks or cylindrical test blocks, while on-site rock mass triaxial tests are limited by test equipment, and cuboid samples are used for testing. The rock mass triaxial test can be divided into rigid loading and flexible loading according to the different application methods of the model surface load. Rigid loading uses a steel backing plate in contact with the rock mass and a jack is used to apply the load, while flexib...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/02G01N3/62F15B15/10
CPCF15B15/10G01N3/02G01N3/12G01N3/62G01N2203/0019G01N2203/0048G01N2203/0262G01N2203/0266G01N2203/0298G01N2203/0676
Inventor 陈冲罗荣边智华庞正江熊诗湖
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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