本文選題：土性參數(shù) + 隨機(jī)場(chǎng)��； 參考：《浙江海洋大學(xué)》2017年碩士論文

【摘要】：軟土土性的物理力學(xué)指標(biāo)是處理軟土地基強(qiáng)度和變形的基本參數(shù),但受歷史成因、賦存環(huán)境等眾多因數(shù)的影響,土性表現(xiàn)出明顯的地域特色以及變異特性,這對(duì)地基的處理與設(shè)計(jì)往往帶來(lái)巨大的困難,需要綜合考慮各種因數(shù)的影響。在巖土工程不確定性模型的研究中,隨機(jī)場(chǎng)模型經(jīng)過(guò)一個(gè)多世紀(jì)的發(fā)展,受到了廣泛的認(rèn)同。本文在收集了舟山地區(qū)大量的工程勘察報(bào)告的基礎(chǔ)上,結(jié)合當(dāng)?shù)氐膶?shí)際,軟土的土性參數(shù)概率特征進(jìn)行了比較細(xì)致的統(tǒng)計(jì)與研究。本文首先大致的介紹了隨機(jī)場(chǎng)理論,然后在此基礎(chǔ)上引出并介紹了巖土工程隨機(jī)場(chǎng)理論,主要包括平穩(wěn)性、各態(tài)歷經(jīng)性以及相關(guān)距離的理論基礎(chǔ)和求解方法;基于收集到的工程地質(zhì)勘察報(bào)告和巖土參數(shù),利用重度和壓縮模量指標(biāo),驗(yàn)證了舟山粉質(zhì)粘土以及淤泥質(zhì)粉質(zhì)粘土的平穩(wěn)性和各態(tài)歷經(jīng)性;然后結(jié)合舟山不打靜探的實(shí)際情況,選取了相關(guān)距離的求解方法并利用壓縮模量指標(biāo)求解出了舟山主島三區(qū)的相關(guān)距離情況。在收集整理了主島三區(qū)22個(gè)工程場(chǎng)地的粉質(zhì)粘土和淤泥質(zhì)粉質(zhì)粘土的土層參數(shù)情況下,統(tǒng)計(jì)了天然含水量、天然重度、塑限三個(gè)物理指標(biāo)以及壓縮系數(shù)、固結(jié)快剪強(qiáng)度指標(biāo)值三個(gè)力學(xué)指標(biāo)的點(diǎn)變異系數(shù),并利用前面求出的相關(guān)距離值求解出了空間變異系數(shù),然后對(duì)土性參數(shù)的自相關(guān)特性進(jìn)行了比較深入的分析和研究。本文限于收集的樣本數(shù)量和范圍尚不足夠,研究結(jié)果具有一定的不確定性。
[Abstract]:The physical and mechanical index of soft soil property is the basic parameter to deal with the strength and deformation of soft soil foundation, but affected by many factors, such as historical causes, existing environment and so on, the soil property shows obvious regional characteristics and variation characteristics. This often brings great difficulties to the treatment and design of foundation, and needs to consider the influence of various factors. In the research of geotechnical engineering uncertainty model, the random field model has been widely recognized after more than a century of development. On the basis of collecting a large number of engineering investigation reports in Zhoushan area and combining with the local practice, this paper makes detailed statistics and studies on the probability characteristics of soil parameters of soft soil. In this paper, the random field theory is introduced, and then the geotechnical engineering random field theory is introduced, including the theoretical basis and solution method of stationary, ergodic and correlation distance. Based on the collected engineering geological survey report and geotechnical parameters, the stability and ergodic behavior of silty clay and silty clay in Zhoushan are verified by using the indexes of gravity and modulus of compression, and then combined with the actual situation of non-static exploration in Zhoushan, the stability and ergodic behavior of silty clay and silty clay in Zhoushan are verified. The method of calculating the correlation distance is selected and the correlation distance of the three areas of Zhoushan main island is solved by using the compression modulus index. After collecting and arranging the soil parameters of silty clay and silty clay in 22 engineering sites in the third area of the main island, three physical indexes, natural water content, natural gravity, plastic limit and compression coefficient, were counted. The point variation coefficient of the three mechanical indexes of the consolidation quick shear strength index value is calculated, and the spatial variation coefficient is solved by using the correlation distance value, and then the autocorrelation characteristics of the soil property parameters are analyzed and studied deeply. In this paper, the number and scope of samples collected are not enough, and the results are uncertain.
【學(xué)位授予單位】：浙江海洋大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU447

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本文編號(hào)：2015552