【摘要】：軟巖是地下工程施工中常見的復(fù)雜地質(zhì)情況之一,科學(xué)準(zhǔn)確的對其分類是進(jìn)行安全施工的重要前提。針對軟巖環(huán)境的復(fù)雜性和不確定性,選取單軸抗壓強(qiáng)度σ_c、完整性系數(shù)K_v、黏聚力σ_n、軟化系數(shù)K_f和軟化指數(shù)?_s 5項定量化指標(biāo)建立軟巖評價指標(biāo)體系,采用熵權(quán)法確定各指標(biāo)權(quán)重,結(jié)合云理論建立熵權(quán) 正態(tài)云模型,對軟巖的類型進(jìn)行分級評價。以4組軟巖工程實(shí)例對所建立模型進(jìn)行檢驗(yàn),并與未確知度法、模糊評價法和BQ法的判別結(jié)果進(jìn)行對比。研究結(jié)果表明,熵權(quán) 正態(tài)云模型在軟巖等級判別中具有良好的實(shí)用性和可靠性,可為軟巖類型預(yù)測提供一種新思路。
[Abstract]:Soft rock is one of the common complex geological conditions in underground engineering construction. Scientific and accurate classification of soft rock is an important prerequisite for safe construction. In view of the complexity and uncertainty of soft rock environment, five quantitative indexes of uniaxial compressive strength 蟽 _ c, integrity coefficient K _ v, cohesion 蟽 _ n, softening coefficient K _ f and softening index? _ s are selected to establish a soft rock evaluation index system. The entropy weight method is used to determine the weight of each index, and the entropy weight normal cloud model is established in combination with cloud theory, and the types of soft rock are classified and evaluated. Four groups of soft rock engineering examples are used to test the established model, and the results are compared with those of unascertained degree method, fuzzy evaluation method and BQ method. The results show that the entropy weight normal cloud model has good practicability and reliability in the classification of soft rock and can provide a new idea for the prediction of soft rock type.
【作者單位】： 中南大學(xué)資源與安全工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51274251)~~
【分類號】：TD315
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本文編號：2304557