【摘要】：高溫環(huán)境中,巖石結(jié)構(gòu)的漸變或突變導(dǎo)致巖石力學(xué)性質(zhì)的變化。對(duì)經(jīng)歷高溫環(huán)境的巖石進(jìn)行軸向壓縮試驗(yàn),結(jié)果表明:巖石單軸抗壓強(qiáng)度、彈性模量隨溫度升高呈現(xiàn)負(fù)指數(shù)規(guī)律減小,巖石的軟化系數(shù)及彈性模量劣化度隨溫度升高逐漸增大;巖石的抗剪強(qiáng)度參數(shù)隨溫度升高逐漸減小,分析粘聚力、內(nèi)摩擦角與溫度變化規(guī)律,可表征為三次多項(xiàng)式變化關(guān)系。為定量分析巖石力學(xué)性質(zhì)的熱損傷特征,分別求得巖石抗剪強(qiáng)度參數(shù)損傷變量,損傷變量值隨溫度升高而逐漸增大。高溫對(duì)巖石的力學(xué)性質(zhì)產(chǎn)生明顯的損傷,研究成果可以為高溫環(huán)境巖體失穩(wěn)預(yù)測(cè)分析提供依據(jù)。
[Abstract]:In high temperature environment, the gradual change or sudden change of rock structure leads to the change of rock mechanical properties. The results show that the uniaxial compressive strength and modulus of elasticity decrease with the increase of temperature, and the softening coefficient and the degree of degradation of elastic modulus increase gradually with the increase of temperature, and the results of axial compression test show that the uniaxial compressive strength and modulus of elasticity of rock decrease with the increase of temperature. The shear strength parameters of rock decrease with the increase of temperature. The relationship between cohesion, internal friction angle and temperature can be expressed as cubic polynomial. In order to quantitatively analyze the thermal damage characteristics of rock mechanical properties, the damage variables of rock shear strength parameters are obtained, and the values of damage variables increase gradually with the increase of temperature. The mechanical properties of rock are obviously damaged by high temperature. The research results can provide the basis for prediction and analysis of rock mass instability in high temperature environment.
【作者單位】： 武昌工學(xué)院土木工程學(xué)院;碧桂園控投集團(tuán);
【分類號(hào)】：TD315

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