本文關(guān)鍵詞：基于孔壓靜力觸探力學(xué)分層的土體邊界識別方法研究　出處：《巖土力學(xué)》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 孔壓靜力觸探 土層邊界識別 力學(xué)分層法 統(tǒng)計(jì)分析

【摘要】：對于巖土工程設(shè)計(jì)來說,準(zhǔn)確識別均質(zhì)土層的邊界是極其重要的。孔壓靜力觸探(CPTU)測試數(shù)據(jù)常用于土分類、土層邊界識別和巖土工程參數(shù)評價等方面�；贑PTU測試數(shù)據(jù),利用統(tǒng)計(jì)分析方法進(jìn)行力學(xué)分層,可以有效地識別均質(zhì)土層邊界。采用組內(nèi)相關(guān)系數(shù)法和修正的Bartlett檢驗(yàn),對CPTU測試數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析,生成相應(yīng)的組內(nèi)相關(guān)系數(shù)指標(biāo)RI和Bartlett統(tǒng)計(jì)量。結(jié)合R_I和修正的Bartlett統(tǒng)計(jì)量臨界值,檢驗(yàn)土體的均質(zhì)性,確定均質(zhì)土層的邊界,從而進(jìn)行力學(xué)分層。利用3個場地的CPTU數(shù)據(jù)進(jìn)行力學(xué)分層,并將其結(jié)果與土性分層結(jié)果進(jìn)行對比。結(jié)果表明,力學(xué)分層結(jié)果不僅能分辨出全部主要的土性分層界面,而且還顯示更多潛在的次級力學(xué)分層界面。
[Abstract]:For the geotechnical engineering design, accurate identification of homogeneous soil layer boundary is extremely important. Piezocone Penetration Test (CPTU) test data used for soil classification, soil boundary identification and geotechnical parameters evaluation. CPTU based on the test data, analysis method for mechanical stratification using statistics, can effectively identify the homogeneous soil the boundary. Using Bartlett test correlation coefficient method and the modified group, statistical analysis of CPTU test data, generate the corresponding intraclass correlation coefficient index RI and Bartlett statistics. Combining with the critical value of Bartlett statistics and modified R_I test, soil heterogeneity, determine the homogeneous soil boundary, thus the mechanical mechanics hierarchical stratification. The 3 sites of CPTU data, and compared the results with soil stratification results. The results show that mechanical stratification results can not only distinguish all the main points of soil The layer interface also shows more potential secondary mechanical stratification interfaces.

【作者單位】： 東南大學(xué)巖土工程研究所;東南大學(xué)江蘇省城市地下工程與環(huán)境安全重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重點(diǎn)研發(fā)計(jì)劃課題(No.2016YFC0800201) 國家自然科學(xué)基金項(xiàng)目(No.41672294) 江蘇省杰出青年基金項(xiàng)目(No.BK20140027)~~
【分類號】：TU413
【正文快照】： 正確識別均質(zhì)土層的邊界是巖土工程勘察的重要內(nèi)容。對于巖土工程設(shè)計(jì),在確定地基土的工程性質(zhì)指標(biāo)和參數(shù)時,如樁的持力層、地基承載力及抗震液化特性等,準(zhǔn)確地識別均質(zhì)土層的邊界是極其重要的。而且,土工參數(shù)的統(tǒng)計(jì)分析只對于均質(zhì)土層內(nèi)的土體來說是有意義的。Baecher指出[1]，

本文編號：1414917