In this paper , the random field model of geotechnical parameter is also expatiated in detail . several methods calculating auto - correlation distance are summarized and the calculate example is provided 詳細論述了土工參數(shù)的隨機場理論模型,總結(jié)了計算土體自相關(guān)距離的幾種方法并給出了計算實例。
Last , according the correlation distance of the random fields and the division , the information management system of geotechnical exploration is developed , which can query and forecast the geotechnical parameters 最后,根據(jù)隨機場的相關(guān)距離和分區(qū)進行了巖土工程勘察信息管理系統(tǒng)的研制。本系統(tǒng)可以進行巖土參數(shù)的預(yù)測查詢功能。
The main contents are as follows : first , according the theory of random fields , the correlation distance is attained and the precision is compared and studied , as a result the precision meets the practice 主要包括以下三方面內(nèi)容:首先,根據(jù)隨機場理論,通過變異函數(shù)求出某一場地的巖土參數(shù)隨機場相關(guān)距離,并進行精度比較分析,精度能夠滿足要求。
The formulas for computing mean and deviation of the average consolidation degree of double - layered soil are derived as vertical coefficient of consolidation submitting to gamma distribution . with these formulas , the influence of geotechnical auto - correlation distance to the probability characteristics of consolidation degree is studied . it shows that along with the rising of auto - correlation distance , the sensitivity of probability characteristics of consolidation degree to auto - correlation distance is falling 當(dāng)豎向固結(jié)系數(shù)為gamma分布時,推導(dǎo)了雙層地基平均固結(jié)度均值和方差的計算公式:利用該公式分析了土性自相關(guān)距離對平均固結(jié)度概率特性的影響,結(jié)果顯示,自相關(guān)距離越大,平均固結(jié)度的概率特性值對自相關(guān)距離越不敏感。
This paper looks soil as homogeneous stationary random fields , expatiates the application of the random process in the geotechnical engineering and establishes the basic concept , its assortment and digital feature of random process and random fields , tests whether this random fields is a stationary process and whether it is ergodic , applies correlation function theory and variable function theory in the study of the random fields of soil parameter , acquires the relation of the two theories and draws the conclusion that they are equal essentially , fits the measured curve by using the correlation function method , variable function method and other methods , and acquires the value of correlation distance , applies the random fields theory of soil parameter in actual engineering , estimates the value of elevation and other soil parameters of 92 holes in baoding city and the results are satisfying 將相關(guān)函數(shù)理論和變異函數(shù)理論分別應(yīng)用于巖土參數(shù)隨機場的研究中,通過運用這兩種理論對巖土參數(shù)特性的描述,得出這兩種理論的內(nèi)在聯(lián)系及其本質(zhì)一致性的結(jié)論。分別運用相關(guān)函數(shù)法、變異函數(shù)法及其它求解相關(guān)距離的方法對實測函數(shù)曲線的擬合,得出描述空間相關(guān)程度的度量? ?相關(guān)距離(或變程) ,對用這幾種不同方法得出的相關(guān)距離(或變程)值進行了比較,并對這幾種方法的優(yōu)劣和實用性做了評比。將巖土參數(shù)隨機場理論運用于工程實際,對保定市區(qū)某場地的92個鉆孔的各層位的層底標(biāo)高及其它幾種常見的巖土參數(shù)做出了估計,預(yù)測結(jié)果比較令人滿意。