A method and device for testing rock equivalent ultimate shear strength
A shear strength and testing method technology, applied in the field of testing ultimate shear strength, can solve the problems of poor economy and environmental protection, difficult to accurately measure shear strength parameters, etc., to reduce blindness and randomness, and to achieve a simple structure. , create convenient effects
Active Publication Date: 2020-11-17
CHINA ELECTRIC POWER RES INST +4
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Problems solved by technology
[0004] In view of this, the present invention proposes a method for testing the equivalent ultimate shear strength of rocks, aiming at solving the difficulties in the construction of transmission line projects caused by the difficulty in accurately measuring the equivalent ultimate shear strength parameters of jointed and fissured rock mass foundation rocks in the prior art. Problems of poor economy and environmental protection
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[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0026] Method example:
[0027] see figure 1 As shown, it is a flow chart of the test method for the equivalent ultimate shear strength of the rock mass fou...
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Abstract
The invention provides a testing method and device for stone equivalent extreme shear strength. The method comprises the following steps: placing a stone equivalent extreme shear strength testing device in a test pin on the outer side of a stone foundation pit excavated on a rock mass foundation, and applying a push-up load to the rock mass foundation by a jack in the stone equivalent extreme shear strength testing device until a whole rock of the rock mass foundation is damaged by shearing; recording the maximum jacking force Pmax of the jack, the inner diameter D of an oil cylinder, the diameter a of a part which applies the push-up load to the rock mass foundation, the excavation depth h of a foundation pit and rupture angles alpha and beta of two sides of the rock mass foundation; anddetermining rock equivalent extreme shear strength tau s according to Pmax, D, a, h and the rupture angles alpha and beta. By the testing method, the rock equivalent extreme shear strength of joint fissure rock mass foundation can be conveniently and accurately measured in field, the basis is provided for optimal design of a rock build-in foundation of a mountainous electric transmission line, theengineering cost is reduced favorably, and energy saving and emission reduction are realized.
Description
technical field [0001] The invention relates to the technical field of power transmission line tower foundations, in particular to a method and device for testing the ultimate shear strength of rocks and the like. Background technique [0002] With the advancement of my country's UHV power grid project, more and more transmission lines will inevitably pass through high mountains and mountains or hilly areas. The upper rock layer is fully weathered to strongly weathered. The foundation type of transmission line towers generally adopts straight column type, excavated and expanded bottom type or jar type rock embedded foundation. [0003] When calculating the uplift stability of the rock-embedded foundation design on the strongly weathered jointed and fissured rock mass foundation, an important parameter used is the equivalent ultimate shear strength of the rock. Since the current norms and standards do not involve the specific test method regulations for rock equivalent ultima...
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IPC IPC(8): G01N3/24
CPCG01N3/24G01N2203/0025G01N2203/0048G01N2203/0075
Inventor 满银白伟程永锋邓海骥潘晓东周楠何金业郑卫锋丁士君付林张娟鲁先龙陈培崔强杨文智毛卫南童瑞铭吉晔
Owner CHINA ELECTRIC POWER RES INST