
[力] 次固结,次生固结;二次固结
Subsequently, the influences of stress level and stress history on the secondary consolidation coefficient are discussed.
讨论了应力水平和应力历史对次固结系数的影响;
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.
试验结果表明,萧山软粘土具有明显的非线性和流变特性,超固结比对次固结系数有显著的影响。
Theses parameters include compression index, expansion index, coefficient of secondary consolidation and initial coefficient of re consolidation volume compressibility, et al.
这些参数包括压缩指数、回弹指数、次固结系数、初始再固结体积压缩系数等。
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.
研究了次固结系数与压缩指数和加荷比的关系,认为连云港软黏土次固结系数与压缩指数的比值为一个常数,并且受加荷比影响不大。
When the pressure is less than the preconsolidation pressure, the coefficient of secondary consolidation has no relation to the pressure.
当压力小于先期团结压力时,土的次团结系数与压力关系不大;
Finally, the method of distinguishing between causes of overconsolidation by loading and secondary consolidation is provided.
最后,提出区分荷载引起超压密和次固结引起超压密的方法。
Characters of quasi-overconsolidation brought in secondary consolidation, relations between OCR and consolidated pressure are discussed.
其次,讨论了次固结引起的拟似超固结的特点和超固结比和固结压力的关系。
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.
通过室内一维次固结试验,研究次压缩变形和预固结压力、再加荷压力之间的相关性。
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.
试验结果表明:随着固结压力的变化,压实黄土的次固结系数表现出与当前应力状态有关的变化规律。
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.
本文首先从理论分析并由试验结果验证了次固结的时间和变形量的有限性。
Based on a number of oedometer tests on 13 soil samples, the influence of repeated loading on the secondary consolidation properties is investigated.
在高压固结仪上,对3种原状软土13个试样进行了反复加卸荷载的一维固结试验,研究了反复荷载作用下软土的次固结特性。
Based on the results, the computation method for deformation of the secondary consolidation reflecting the influence of consolidation pressure was developed.
在此基础上提出了正常固结土次固结沉降量随固结压力变化的计算方法。
The results were as follows: for the over-consolidated soils, coefficient of the secondary consolidation increased with load;
结果表明:对超固结土,次压缩系数随荷载增大而增大;
Due to the viscous deformation of subsoil, consolidation shows secondary time effects.
由于粘滞性的存在,土体在固结过程中变形呈现出次时间效应。
Four foundation seepage controlling methods are adopted, including high pressure curtain grouting, main drainage, secondary drainage, and consolidation grouting.
基础渗流控制采用防渗高压灌浆帷幕、主排水、辅助排水和坝基固结灌浆组成的工程布置形式。
Its industrial structure is being optimized and its growth pattern of secondary and tertiary industries is jointly driving economic consolidation.
产业结构不断优化,二、三产业共同推动经济增长的格局进一步巩固。
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.
根据次固结系数双曲线模型建立的次压缩变形计算公式,既反应了软土本身性质的影响,也反应了预固结压力和再加荷压力的影响。
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.
计算软土次固结的常用方法没有反映荷载变化的影响,实际上只适用于正常固结土。
The method, ******, practical, and very convenient to use, can be used to predict the settlement due to secondary consolidation.
该方法简单实用、使用极为方便,可用于估计建筑物的次固结沉降。
The relationship of the secondary consolidation coefficient and the compression index is discussed.
研究了次固结系数与压缩指数关系;
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.
同时,固结系数和固结压力、次固结系数和压缩指数之间均有较好的相关性。
This new method avoids the disadvantages of the graphical methods, and eliminates the influences of the initial settlement and the secondary consolidation.
该方法避免了图解法的缺陷,消除了初始沉降和次固结的影响。
It can eliminate the majority of primary consolidation settlement and parts of secondary consolidation settlement.
它可以消除软土地基大部分的固结沉降和次固结沉降。
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.
试验结果表明,随着固结压力的变化,压实黄土的次固结系数表现出与当前应力状态有关的变化规律。
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 …
最后,讨论淤泥在恒温恒压条件下次固结变形随时间的变化发展过程,定量地描述次固结量和主固结量的比值与次固结时间和固结压力水平的关系。
在土力学与岩土工程领域,次固结(Secondary Consolidation) 是指土体在主固结(Primary Consolidation)完成后,由于土骨架自身的黏滞性蠕变(Creep)而持续发生的缓慢、长期的体积压缩变形过程。其核心特征如下:
定义与机理
主固结由孔隙水排出导致有效应力增加引起,而次固结发生在孔隙水压力基本消散后(即超静孔隙水压力接近零时)。此时土体颗粒在持续荷载作用下发生缓慢的黏弹性重排列或颗粒间错动,导致土体骨架随时间进一步压缩,体积持续减小。该过程与孔隙水的排出速率无关,主要受土体本身的流变特性控制 。
时间特性与影响因素
次固结变形在对数时间尺度上近似呈线性发展(即变形速率随时间递减),可持续数年甚至数十年。其显著程度主要取决于:
工程意义
次固结引起的长期沉降对工程结构(如路堤、建筑地基、堤坝)的服役性能至关重要。其沉降量可能超过主固结沉降,尤其在软黏土地基中。忽略次固结会导致低估总沉降量和沉降持续时间,引发结构开裂、不均匀沉降等问题。因此,在软土地区工程设计及工后沉降预测中必须予以考虑 。
权威参考来源:
“Secondary consolidation”是一个工程地质学或土力学领域的专业术语,结合“secondary”和“consolidation”的词义可解释如下:
特征 | 主固结(Primary) | 次固结(Secondary) |
---|---|---|
主导机制 | 孔隙水排出 | 土颗粒结构重组 |
时间范围 | 较短(几小时至几年) | 极长(数十年) |
影响因素 | 渗透系数、排水路径 | 土体矿物成分、有机质含量 |
若需更深入的工程案例分析,可参考土力学教材或岩土工程规范(如Terzaghi固结理论扩展内容)。
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