水敏性土 的英文怎麼說
中文拼音 [shuǐmǐnxìngtǔ]
水敏性土
英文
water sensitive soil-
3. the two species are suitable for growing in the cool, moist habitat with alkaline soil and sensitive to water
兩物種適宜生長在陰涼、濕潤、略呈堿性的土壤中,對水分因子特別敏感。Malan loess was a special water sensitive geological deposit, whose physical, mechanical and hydraulic properties changed obviously under the softening action of water
摘要馬蘭黃土在水軟化作用下,土體的物理、力學與水理性質呈現出明顯的規律性,屬典型的水敏感性地質體。The results of sensitive experiments indicate that runoff will directly affect the change of soil moisture states, thus affect sensible and latent heat fluxes and other energy terms
並對耦合水文模型的陸面模式做了敏感性試驗,結果表明,陸面模式中徑流的描述合理與否,將8一對土壤溫濕及地表通量產生顯著影響。Considering the similitude law for shaking table test, we study the test results and obtain some conclusions which are a ) generally, the silty soil in test box liquefies and the liquefied time has relation with the amplitude of acceleration, b ) when the intensity is on and above eight degree, the silty soil deposit will be liquefied dramatically, c ) the relationship of the pore water pressure is relevant to the cycle loading which represents when the cycle loading ranges from little to great, the relationship is represent as a concave curve, or else as a protruding curve and tends to stability. ( 3 ) based on the triaxial compression test and the resonant column test, some studies are made such as a ) the duncan - chang parameters of constitutive model, b ) the dynamic shear modulus ratio and c ) the damping ratio of the site soil deposits. in order to deal with the test data, a computer program is compiled
( 2 )利用小型振動臺進行了k _ 0固結狀態下粉土的振動液化模擬研究,通過分析正弦荷載作用下的試驗資料,驗證了粉土的孔隙水壓力增長模式的合理性;從微分方程推導了基於土體振動臺模型試驗的相似律,並從模型實體、孔壓時程曲線和相似律等方面做出了分析,得出了如下結論:在小型振動臺試驗中,模型箱中的粉土都發生了液化,液化的時刻和輸入加速度幅值有關,而對頻率的變化不太敏感;粉土在相當於8 9度地震烈度的加速度幅值作用下可能產生嚴重的液化;孔壓的增長曲線形狀與施加的荷載有關:當施加荷載為由小到大的形式時,曲線形狀為上凹的曲線;當施加荷載為等幅的正弦荷載或荷載幅值由大到小時,曲線形狀為上凸的曲線,且逐漸趨于穩定。For parameter a, there is a close relationship exist between a ( 9, sr ) in two different radar incident angle that can be expressed as : with considering the effects of soil texture, we get the final expression of the inversion model : where mv ( t1 ), mv ( t2 ) is volumetric soil moisture content in two different temp, c, d is soil type related parameters, and v ( t1 ), s ( t2 ) is coresponding bare soil radar backscattering coefficients. inversion results show that for the c band hh polarized radarsat scansar data with a range of incidence angle from 20 to 40, the soil moisture change value can be derived with an acceptable accuracy using the above model. the temporal and spatial soil moisture change patterns are associated with rainfall and vegetation cover, as well as the soil hydraulic characteristics
利用最新發展的電磁波散射模型研究了不同植被覆蓋地表雷達波對地表土壤水分的敏感性,建立了半經驗植被雷達後向散射模型; 2 ) .研究發現在農作物等矮小植被覆蓋地表,植被層直接後向散射與植被類型相關,且在植被生長期,雷達後向散射系數對植被含水量的敏感性要高於對植被高度變化的敏感性; 3 ) .解決了單參數雷達地表土壤水分反演問題中,雷達入射角和地表粗糙度的影響這一難點問題; 4 ) .利用土壤介電模型校正了不同土壤類型對反演地表土壤體積含水量的影響; 5 ) .在以上成果基礎上,建立了完整的單參數雷達地表土壤水分變化探測反演演算法,經地表驗證,模型反演地表土壤水分變化值的精度為rmse = 0The authors probed into the reason of ambivalence, pointed out the development relationships among them, and mainly brought forward seven measures : ensuring necessary plantations and studiously increasing yields of grains ; setting up reasonable grains reserves ; increasing the yield of unit area and overall productivity of land, and ensuring gross yields of grains to be increased steadily ; adjusting measures to local conditions, differentiating land varieties among the total land of gansu province to produce grains ; continuously adjusting structure of production, improving agricultural economy benefits, and increasing farmer incomes ; realizing essential self - support of gross grains, meanwhile dealing with well regional and structural scarcity gradually ; strengthening outcomes of ecological construction, increasing the intensity of ecological compensation, utilizing strategy of virtual water to solve grain safety to be fragile and sensitive regions of ecology, and realizing agricultural sustainable development
文章分析問題的矛盾所在,指出三者的辨證發展關系,並主要提出七點措施:保證一定的播種面積,努力增加糧食產出;建立合理的糧食儲備規模;依靠科技,主攻單產,提高土地的綜合生產能力,保證糧食總量穩定增長;因地制宜、分類指導省內不同地區的糧食生產;繼續調整農業生產結構,提高農業的經濟效益,增加農民收入;實現省內糧食總量基本自給的同時,逐步解決好區域性、結構性短缺問題;鞏固生態建設成果,加大生態補償力度,利用虛擬水戰略解決生態脆弱區、生態敏感區等局部地區的糧食生產安全,實現農業可持續發展。In addition to nutritional factors, the productivity of many acid soils is affected by physical factors that include low water holding capacity ( oxisols, spodosols ) and susceptibility to crusting, erosion and especially compaction ( oxisols, ultisols )
除了養分因素外,許多酸性土壤的生產力受物理因素的影響,包括持水量低(氧化土,灰化土)和對結殼、侵蝕及特別是壓實(氧化土、老成土)敏感。From the aspect of soil characters, aggregate distribution and stability as well as aggregate stability mechanism of ferrisols were studied in this paper, which would have great importance in reducing water erosion danger, stabilizing and improving agricultural production, preserving soil resources and balancing soil ecological system
本研究應用多種方法,從團聚體穩定性的角度,研究富鐵土對水力侵蝕的敏感性並探討其影響團聚體穩定的物理學機制,對于減小水蝕危害、保護土壤資源、維持和提高生產率、維護土壤生態系統平衡具有重要意義。Sometimes, some silty soil, super soft soil, because of its high compressibility, low strength, high water component, high dexterousity, has notable rheological behavior
往往某些淤泥質土、超軟粘土,其壓縮性高、強度低、含水量高、靈敏度高,具有較顯著的流變特性。The choice dam type is especial importance, during the designed research of the rock - fill dam, particular under the rock - fill dam with very deeply cover layer, the stress and strain of the middle wall and cutting interpenetration wall of the dam foundation is mostly sensitive, whether the. design of dam is scientific and reasonable, it is very important for cutting interpenetration and stability of the dam, the article offer the reference for the design of cutting interpenetration in the foundation with deep cover with earth the water conservancy in xiaban zone, based on the study and analysis the design of cutting seep in the foundation with deep cover with earth, cutting interpenetration concrete wall and the joining model of cutting interpenetration material in body of dam and the applying effect in the practical worko based on the foundation which absorbed and summarize the achievement of design and research in the inter and outer country, for the project of the clay vertical middle wall and vertical cutting interpenetration, the asphalt concrete vertical middle wall and vertical cutting interpenetration the clay inclined middle wall and the lever carpet layer cutting interpenetration, respectively in terms of the different stage of complete period sluice period and working condition, adopting nonlinear calculate and analysis with the finite element method ; carrying the analysis and study with the 3d finite element method as to the different joining model of the left bank high slope cutting interpenetration body and the foundation concert cutting interpenetration wall ; carrying the analysis and study with the 3d finite element method as to the effect of the wall stress and strain because of the different elasticity modulus of the concert cutting interpenetration wall through the analysis and study with the different project. have comparatively all - around comprehended the various model dam, particular the distribute rule of stress and strain of the cutting interpenetration system, provide for the important evidence of the plastic area size the join model of the foundation cutting interpenetrate wall and dam body cutting interpenetrate system the choice of the dam model and the design of the structure of the dam body, the result of research and advice have very importance value in design and building for the similarity project
工程設計中,壩型的選取顯得尤為重要,特別對于壩基有深厚覆蓋層的堆石壩,心墻和壩基防滲墻的應力和變形是壩體、壩基最敏感的部位,設計方案是否安全、科學和合理,對大壩防滲和穩定起到至觀重要的作用。本文研究分析了國內外深厚覆蓋層基礎防滲設計、壩基混凝土防滲墻與壩體防滲體銜接形式及工程實際應用效果,為下坂地水利樞紐工程深厚覆蓋層基礎防滲設計的方案選擇提供了參考;在吸收和歸納了國內外堆石壩的設計研究成果的基礎上,對粘土心墻和壩基垂直防滲方案、瀝青混凝土心墻和壩基垂直防滲方案以及粘土斜心墻和壩基水平鋪蓋防滲方案,分別按竣工期和蓄水運行期的不同工作情況進行了有限元非線性計算分析;對左岸高陡邊坡的大壩防滲體與基礎混凝土防滲墻的不同結合型式進行了三維有限元靜力計算分析和研究;對混凝土防滲墻不同彈性模量對墻體應力和變位的影響進行了三維有限元靜力計算分析和研究。通過對不同方案的計算分析和研究,比較全面的了解了各方案壩體,尤其是防滲體的應力和變形分佈規律,為壩型選擇、壩體結構設計、基礎防滲墻與壩體防滲體的結合型式以及塑性區大小的確定提供了重要依據。Aminobenzenesulfonic acid super - plasticizer is selected though cement paste test, which be provided with high water - reducing property, low slump loss and good compatibility with cement. according to the request of super high early strength, admixture rf is obtained though tests to compare performances of different accelerators and admixtures. experimental research and analysis are carried out on coarse aggregate ' s grain - size effect and composite aggregate ' s bulk - density to take sensitivity of coarse aggregate into account
通過水泥凈漿試驗比較選擇了減水率高、坍落度損失小、與水泥適應性好的氨基苯磺酸鹽高效減水劑;針對超早強的性能要求,試驗比較了不同早強劑及早強性摻合料的性能表現,研製了早強性能顯著、與高效減水劑和水泥相容性較好的rf摻合料;考慮到修補混凝土對粗集料粒徑的敏感性,對粗集料粒徑效應及混合集料堆積密度進行試驗研究與分析;並對修補混凝土的抗折、抗壓、新老界面粘結強度以及抗凍性等進行了試驗研究。In this paper wangzhuang oil field is used as a case of high water sensitivity reservoir to investigate the damage of clay mineral
筆者以王莊油田強水敏性油藏為例,對粘土礦物危害進行探討。The first one is to study the relationship between soil moisture and precipitation over the shiguanhe river catchment in the summer of 1998 and 1999. the second part is to evaluate the performance of a modified bats land surface model by offline experiments
第一部分是研究我國史灌河流域土壤濕度和降水的關系;第二部分是改進的bats陸面模式獨立試驗;第三部分是改進的bats模式敏感性試驗。( 3 ) sensitivity analyses were conducted for parameters in unsaturated soil conductivity model which was derived from redistribution process. the results calculated from measured data indicate that the sensitivities of conductivity to parameter b and n are higher than the other parameters
( 3 )對由再分佈過程推求的土壤非飽和導水率模型中的參數進行了敏感性分析,根據實測資料的計算表明,非飽和導水率對參數b和n的敏感性均大於其它參數。The flexible retaining structure is another important retaining structure in soft soil. the integrated numerical analysis of this retaining structure ( including the methods and theory of calculating active earth pressure under sorts of conditions as well as the calculating method of horizontal stiffness coefficient of bracing structure and the method of deciding boundary condition etc. ) was gived. the effect of all parameters on the characteristics of retaining structure was discussed using methods of sensitivity - analysis
本文針對目前常用的彈性支點法,給出了完整的數值分析方法,包括各種條件下的墻後土壓力的計算方法和原理、支撐系統(或錨拉系統)水平剛度系數的計算、邊界條件的確定方法等,並以此為基礎採用靈敏度系數分析方法討論了各參數對圍護結構形態的影響,指出土體側向基床比例系數是影響圍護結構變形的最主要的參數。Loess is a kind of typical structural soil, its special structure and special sensitivity to water effect on the characteristics of engineering mechanics of loess, this is also the special aspect of the study on dynamic behavior of loess
黃土是一種典型的結構性土,其特殊的結構性和對水的特殊敏感性直接影響著黃土的工程力學性質,這也是黃土動力學研究的特殊性所在。In this article, geotechnical engineering numerical analysis program flac4. 0 is used, working mechanism and main influential factor of composite soil nailing system with step excavation was calculated in detailed, contain distribution and influential factors of axial force and the max axial force in soil nails ; the variation of axial force in anchors ; the variation and influential factor of foundation pit horizontal displacement, ground surface settlement, ground surface horizontal displacement and rebound deformation
本文採用巖土工程數值分析軟體flac4 . 0 ,對樁錨復合土釘支護在分步開挖下的工作性能和主要影響因素進行了詳細的計算,分析了土釘軸力和最大軸力的分佈規律、影響因素;錨桿軸力的變化規律;基坑水平位移、地表沉降、地表水平位移和坑底隆起的變化規律以及影響因素的敏感程度。Because of the unreasonable restriction of actual models, soil water content at the end of the stage that its sensitivity parameter is small is always close to the wilting coefficient, this makes planting risk. to deal with the planting risk of inadequate irrigation schedule, this paper develops a new multi - objective model for inadequate irrigation schedule programming, and uses the staged multi - dimensional fuzzy optimization method to get the decision - making
針對現行非充分灌溉制度優化設計模型中約束的不合理性,致使作物在敏感性指數小的階段末土壤含水率易趨于凋萎系數,生產中存在風險的不足,本文提出了考慮作物種植風險指標情況下,非充分灌溉制度的多目標優化模型;並採用本文提出的多維多目標動態規劃方法進行模型求解。Firstly, the experience of cfrm study is summarized and experiments are carried out to improve the preparation technics and to get the appropriate proportion of the materials used. secondly, the factors, which affect the conductivity and stability of cfrc, are investigated. and its smart property is studied with different cf contents and loading directions, and under elastic loading cycles
其次,通過試驗,探討了碳纖維含量、水灰比、骨料粒徑、齡期、極化效應、電極形式等對碳纖維混凝土導電性、穩定性的影響;研究了碳纖維摻量、加載方向等對碳纖維混凝土機敏性的影響;並研究了在彈性范圍、循環荷載作用下,材料的壓敏性。The study has systematically investigated the characters of spatial and temporal variation of temperature and precipitation in qinghai since 1961, and the results show that the trend rate of annually average of temperature in qinghai is significantly higher than that of the other places in the whole china, with qinghai acting as a sensitive area of china climate warming, and that precipitation efficiency is also clearly improved
以配合西部大開發進行基礎性、戰略性和前瞻性研究,為青海省生態環境與社會經濟的協調發展,水土資源的可持續利用提供科學依據。本研究系統分析了1961年以來青海省氣溫、降水等氣候特徵因子的時空變化特徵,表現在青海高原年平均氣溫變化傾向率要明顯高於全國,是中國氣候變暖的敏感區,降水的有效性發生了明顯變化。分享友人