Testing device and testing method for mechanical parameters of non-standard rock test piece

Abstract

The invention discloses a testing device and a testing method for mechanical parameters of a non-standard rock test piece. The testing device comprises a hydraulic pressure testing machine used for loading, a test piece clamping device matched with the pressure testing machine for use, as well as upper and lower loading cones, wherein the structure of the test piece clamping device is as follows: a cushion column with adjustable height is arranged on a center shaft of a column head of a hydraulic oil cylinder of the hydraulic pressure testing machine, a cushion plate is arranged on the cushion column, left and right longitudinal rods which can be vertically adjusted are symmetrically arranged at two ends of the cushion plate, horizontal rods which can be horizontally pushed and pulled are respectively arranged at symmetrical positions on the left and right longitudinal rods, the inner end heads of the two horizontal rods are respectively provided with an arc-shaped elastic clamping pad, and the arcs of the two clamping pads are required to correspond to each other. According to the testing device and the testing method, tests for mechanical properties of rock can be directly carried out on test pieces adopted on site indoors by utilizing the pressure testing machine and the clamping device with the radial clamping function, so that the accuracy of test results is significantly improved, and the purpose of safe tests is achieved as personal injury accidents also cannot occur.

Description

technical field [0001] The invention relates to a test device and a test method for the mechanical parameters of a rock test piece, in particular to a test device and a test method for the mechanical parameters of a non-standard rock test piece. Background technique [0002] In engineering construction such as geology, mining, hydropower, civil engineering and transportation, it is often necessary to sample the rock mass on site, conduct experiments on the rock samples in the laboratory, and obtain the basic physical and mechanical parameters of the rock, so as to stabilize the rock mass engineering. Provide reliable basic data for performance analysis and support design. [0003] At present, the mechanical tests of rock specimens with standard shapes are widely carried out indoors. According to the requirements of the "Engineering Rock Mass Test Method Standard" (GB / T50266-99) of the People's Republic of China, standard specimens refer to regular cylinders or cuboids. , it...

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Problems solved by technology

However, there have always been many difficulties in the preparation of rock standard specimens as the test object. Among them, there are insufficient rock sample processing equipment and sampling methods. The core is short and the hole diameter is thick, which cannot meet the size of the standard test piece after secondary processing in the laboratory

In addition, such as mudstone that is easy to weather, afraid of disturbance, and weakly cemented, etc., during the secondary processing and preparation of rock samples indoors, due to the disturbance of drilling, cutting, grinding and other processing links, it is inevitable to cause different degrees of damage to the specimen Although the standard specimens processed and formed in the laboratory meet the requirements in terms of shape and size, they are quite different from the natural state of the rock, and the test results cannot reflect the real mechanical properties of the rock.

[0005] Considering the current state of laboratory rock mechanics tests and the preparation of standard specimens, a test device and test method for direct testing of rocks sampled in the field were developed to obtain the basic mechanical parameters of rocks, so as to solve the problem of short cores, Experimental testing problems of non-standard rock specimens with large diameter or difficult secondary processing, etc.

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