
[力] 次固結,次生固結;二次固結
Subsequently, the influences of stress level and stress history on the secondary consolidation coefficient are discussed.
讨論了應力水平和應力曆史對次固結系數的影響;
It is indicated that rheological characteristic of Xiao-shan soft soil is remarkable, and the over-consolidated ratio affects the coefficient of secondary consolidation significantly.
試驗結果表明,蕭山軟粘土具有明顯的非線性和流變特性,超固結比對次固結系數有顯著的影響。
Theses parameters include compression index, expansion index, coefficient of secondary consolidation and initial coefficient of re consolidation volume compressibility, et al.
這些參數包括壓縮指數、回彈指數、次固結系數、初始再固結體積壓縮系數等。
The relationship between secondary consolidation coefficient and compression index is a constant ratio, which indicates that the load ratio has little influence on secondary consolidation coefficient.
研究了次固結系數與壓縮指數和加荷比的關系,認為連雲港軟黏土次固結系數與壓縮指數的比值為一個常數,并且受加荷比影響不大。
When the pressure is less than the preconsolidation pressure, the coefficient of secondary consolidation has no relation to the pressure.
當壓力小于先期團結壓力時,土的次團結系數與壓力關系不大;
Finally, the method of distinguishing between causes of overconsolidation by loading and secondary consolidation is provided.
最後,提出區分荷載引起超壓密和次固結引起超壓密的方法。
Characters of quasi-overconsolidation brought in secondary consolidation, relations between OCR and consolidated pressure are discussed.
其次,讨論了次固結引起的拟似超固結的特點和超固結比和固結壓力的關系。
The correlations among the secondary compression deformation, pre-consolidation pressure and reloading pressure were stu***d through the 1D secondary consolidation laboratory tests on soft soil.
通過室内一維次固結試驗,研究次壓縮變形和預固結壓力、再加荷壓力之間的相關性。
The secondary consolidation coefficient is not related to time of sustained loads, and it becomes larger as the reloading pressure increases and becomes less with the pre-consolidation pressure.
試驗結果表明:隨着固結壓力的變化,壓實黃土的次固結系數表現出與當前應力狀态有關的變化規律。
Results of theoretical analyses and series of experiments on the limitation of the time and magnitude of the secondary consolidation deformation in clay are presented.
本文首先從理論分析并由試驗結果驗證了次固結的時間和變形量的有限性。
Based on a number of oedometer tests on 13 soil samples, the influence of repeated loading on the secondary consolidation properties is investigated.
在高壓固結儀上,對3種原狀軟土13個試樣進行了反複加卸荷載的一維固結試驗,研究了反複荷載作用下軟土的次固結特性。
Based on the results, the computation method for deformation of the secondary consolidation reflecting the influence of consolidation pressure was developed.
在此基礎上提出了正常固結土次固結沉降量隨固結壓力變化的計算方法。
The results were as follows: for the over-consolidated soils, coefficient of the secondary consolidation increased with load;
結果表明:對超固結土,次壓縮系數隨荷載增大而增大;
Due to the viscous deformation of subsoil, consolidation shows secondary time effects.
由于粘滞性的存在,土體在固結過程中變形呈現出次時間效應。
Four foundation seepage controlling methods are adopted, including high pressure curtain grouting, main drainage, secondary drainage, and consolidation grouting.
基礎滲流控制采用防滲高壓灌漿帷幕、主排水、輔助排水和壩基固結灌漿組成的工程布置形式。
Its industrial structure is being optimized and its growth pattern of secondary and tertiary industries is jointly driving economic consolidation.
産業結構不斷優化,二、三産業共同推動經濟增長的格局進一步鞏固。
Based on the model, the secondary compression settlement formula is established, which reflects the influence of soft clay characteristics, pre-consolidation pressure and reloading pressure.
根據次固結系數雙曲線模型建立的次壓縮變形計算公式,既反應了軟土本身性質的影響,也反應了預固結壓力和再加荷壓力的影響。
The conventional method to compute secondary consolidation of soft soils does not reflect the influence of load. It is only applicable to the normally consolidated soils actually.
計算軟土次固結的常用方法沒有反映荷載變化的影響,實際上隻適用于正常固結土。
The method, ******, practical, and very convenient to use, can be used to predict the settlement due to secondary consolidation.
該方法簡單實用、使用極為方便,可用于估計建築物的次固結沉降。
The relationship of the secondary consolidation coefficient and the compression index is discussed.
研究了次固結系數與壓縮指數關系;
There is a significant correlativity between the coefficient of consolidation and the consolidation pressure, as well as the coefficient of secondary consolidation and compression index.
同時,固結系數和固結壓力、次固結系數和壓縮指數之間均有較好的相關性。
This new method avoids the disadvantages of the graphical methods, and eliminates the influences of the initial settlement and the secondary consolidation.
該方法避免了圖解法的缺陷,消除了初始沉降和次固結的影響。
It can eliminate the majority of primary consolidation settlement and parts of secondary consolidation settlement.
它可以消除軟土地基大部分的固結沉降和次固結沉降。
The test results indicated that with the change of consolidation pressure, the coefficient of secondary consolidation shows a sound regularity with the variation of stress conditions.
試驗結果表明,隨着固結壓力的變化,壓實黃土的次固結系數表現出與當前應力狀态有關的變化規律。
At last, it is discussed that the pressure secondary consolidation deformation develops with time at a given constant temperature and pressure. The ratio of secondary consolidation …
最後,讨論淤泥在恒溫恒壓條件下次固結變形隨時間的變化發展過程,定量地描述次固結量和主固結量的比值與次固結時間和固結壓力水平的關系。
在土力學與岩土工程領域,次固結(Secondary Consolidation) 是指土體在主固結(Primary Consolidation)完成後,由于土骨架自身的黏滞性蠕變(Creep)而持續發生的緩慢、長期的體積壓縮變形過程。其核心特征如下:
定義與機理
主固結由孔隙水排出導緻有效應力增加引起,而次固結發生在孔隙水壓力基本消散後(即超靜孔隙水壓力接近零時)。此時土體顆粒在持續荷載作用下發生緩慢的黏彈性重排列或顆粒間錯動,導緻土體骨架隨時間進一步壓縮,體積持續減小。該過程與孔隙水的排出速率無關,主要受土體本身的流變特性控制 。
時間特性與影響因素
次固結變形在對數時間尺度上近似呈線性發展(即變形速率隨時間遞減),可持續數年甚至數十年。其顯著程度主要取決于:
工程意義
次固結引起的長期沉降對工程結構(如路堤、建築地基、堤壩)的服役性能至關重要。其沉降量可能超過主固結沉降,尤其在軟黏土地基中。忽略次固結會導緻低估總沉降量和沉降持續時間,引發結構開裂、不均勻沉降等問題。因此,在軟土地區工程設計及工後沉降預測中必須予以考慮 。
權威參考來源:
“Secondary consolidation”是一個工程地質學或土力學領域的專業術語,結合“secondary”和“consolidation”的詞義可解釋如下:
特征 | 主固結(Primary) | 次固結(Secondary) |
---|---|---|
主導機制 | 孔隙水排出 | 土顆粒結構重組 |
時間範圍 | 較短(幾小時至幾年) | 極長(數十年) |
影響因素 | 滲透系數、排水路徑 | 土體礦物成分、有機質含量 |
若需更深入的工程案例分析,可參考土力學教材或岩土工程規範(如Terzaghi固結理論擴展内容)。
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