( 2 ) cia can not reflect the degree of chemical weathering of black shales precisely , and a - cn - k diagram can not reflect chemical weathering processes of black shales completely ( 2 ) cia值并不能靈敏地反映黑色頁巖的化學(xué)風(fēng)化程度, a - cn - k三角圖解并不能完整地反映黑色頁巖化學(xué)風(fēng)化的整個(gè)過程。
A combined effect of climate , relief , integrated lithology , vegetation and cultivated area seemed to explain the variability of modern chemical weathering and mechanical denudation rates 相比而言,西江和北江流域巖石的整體化學(xué)風(fēng)化進(jìn)程、 2大類巖性的化學(xué)風(fēng)化程度均較之長(zhǎng)江、黃河流域強(qiáng)烈的多。
There is a weak negative correlation between ree concentrations and ph values in these groundwater samples . weathering degree and ree concentrations of the parent rocks are the main factors affecting the concentration of ree in the groundwater 發(fā)現(xiàn)風(fēng)化殼地下水中的稀土元素含量與水的ph值呈弱的負(fù)相關(guān)關(guān)系,并且受母巖風(fēng)化程度及母巖稀土含量的影響。
The results show no obvious difference in the contents of major components in the different xiashu loess profiles , but some difference in the contents of readily leaching elements of loess and the chemical weathering intensity of loess among the different xiashu loess profiles 結(jié)果表明不同下蜀土剖面在主要組分含量上差異不明顯,但在易淋溶元素含量和經(jīng)歷的化學(xué)風(fēng)化程度方面存在一定差異。
The sediments in the core are weakly weathered , lightly abraded and bad sorted , they have the same feature as river sediment , which is derived from near source and did not experience seriously transformation by ocean . due to the rate of insufficient sediment supply the sedimentation rate is low 碎屑礦物風(fēng)化程度低,磨蝕不顯著,分選較差,河流砂特征明顯,沉積物來自于近源,由河流輸送入海,海洋改造不十分強(qiáng)烈,由于物源供應(yīng)不足,沉積速率較低。
A new approach to assess the weathering degrees of rocks by the variation of rayleigh wave velocities is put forward in this paper , and the weathering degrees of the marble plate revealed by this method is exactly coincided with the actual weathering situation of this plate 在第四部分中通過把超聲層析和瑞雷波勘探方法應(yīng)用于故宮玉石欄板風(fēng)化程度評(píng)價(jià)中,對(duì)檢測(cè)的精度和準(zhǔn)確性做了一定的研究,提出了由利用瑞雷波速變化評(píng)價(jià)巖石風(fēng)化程度的新方法,結(jié)果比較理想。
This paper reports the analytical results of major chemical components of 94 loess samples from the xiashu loess profile in the middle and lower reaches of the changjiang river , the major component contents and the weathering intensity of xiashu loess were compared with those of luochuan loess from northwest china 摘要根據(jù)長(zhǎng)江中下游三個(gè)下蜀土剖面94個(gè)樣品主要組分元素化學(xué)成分的分析結(jié)果,結(jié)合西北洛川黃土數(shù)據(jù)資料進(jìn)行了下蜀土剖面主要元素成分含量和風(fēng)化程度的分析對(duì)比。
The criterion to judge the relaxation depth of rock mass of excavation slope is defined by analyzing data of sonic wave speed and field investigation , and the distributing law of various weathered degree fossil weathered rock on slope of are educed . the mechanics parameters of relaxed rock mass are studied by using relational expression between mechanics parameters and value of sonic wave speed , which provide convenience for the study of mechanics parameters of rock mass in different state 在此基礎(chǔ)上,利用現(xiàn)場(chǎng)調(diào)查和實(shí)測(cè)波速資料,制定了邊坡開挖巖體松弛帶深度的判定標(biāo)準(zhǔn),從而分析得出了各風(fēng)化程度古風(fēng)化巖邊坡的松弛帶分布規(guī)律,并采用波速與巖體力學(xué)參數(shù)的相關(guān)式對(duì)松弛帶巖體的力學(xué)參數(shù)進(jìn)行了研究,為研究不同狀態(tài)下巖體的工程特性提供了方便。
Abstract : compared with soil destroyed pattern of vertical force and its controlled factor of bearing capacity , it is concluded that pile capacity and its tip resistence have some difference when soil with the same physical mecanic property is used as natural foundation and pile tip resistent layer . whereas the middle weathering rod stratum hasn ' t this property , that is to say it has the same bearing capacity and pile tip resistence 文摘:通過豎向荷載下土(巖)體的破壞模式及其承載能力控制因素的比較,論述了物理力學(xué)性能相同的土層作為淺基礎(chǔ)的天然地基與樁端持力層時(shí),承載力值與樁端阻力值應(yīng)存在一定的差異;而中(微)風(fēng)化程度的同一巖層作為天然地基與樁端持力層時(shí),不具有這方面的差異性,承載力值與樁端阻力值應(yīng)該相等。