1) liquefaction discrimination
液化判别
1.
Method for liquefaction discrimination of crushed stone piles composite ground is also proposed herein.
本文通过一系列现场原位试验,指出碎石桩对可液化软弱地基具有三方面的加固作用,即对可液化土层的挤密和振密作用、减震作用及排水作用,文中最后提出了碎石桩复合地基液化判别的方法。
2) liquefaction evaluation
液化判别
1.
Based on the engineering geological features in Tianjin and the related standards,the critical standard penetration test value for seismic liquefaction evaluation is defined by depth under the most disadvantageous conditions.
在采用标准贯入试验法进行粉土及砂土的液化判别过程中,根据天津地区实际地质及规范规定的条件下,可以最不利条件确定不同深度处的液化判定标贯击数临界值,然后在外业施工过程中,根据实测标贯击数大于最不利条件下的临界标贯击数时,可直接判定该标贯点粉土或砂土不液化,而不需取扰动土样进行室内颗粒分析试验,这样既满足规范的判定要求,减少室内试验的工作量,同时又能节约勘察成本,是值得采用的一种方法。
2.
Then,the liquefaction evaluation of silt and silty sand is made according to the results of the standard penetration tests in-situs(SPT) and indoor dynamic triaxial tests;the results of them a.
为了考虑尔王庄水库大坝地基地震液化及动力特性,首先通过室内动三轴试验研究粉土、粉砂在动荷载作用下的孔压累积特性,提出了选择双幅应变达到5%作为土样液化的标准;然后采用现场标贯试验和室内动三轴试验对水库坝基中的粉土、粉砂层进行了液化判别,并对判别结果进行了对比分析;同时在液化判别的基础上利用有效应力动力分析方法对坝基土体进行了考虑渗流和不考虑渗流的地震液化的非线性动力有限元分析,并将液化的判别结果与现场标贯试验、室内动三轴试验的判别结果进行对比,从中得出一些有益的结论可供类似工程参考。
3.
In this paper,the liquefaction evaluation of silt and silty sand was made according to the results of the standard penetration tests(SPT) in-situ and dynamic tri-axial tests indoor;the results of them were also compared.
采用现场标贯试验(SPT)和室内动三轴试验对水库坝基中的粉土、粉砂层进行了液化判别,并对判别结果进行了对比分析;同时在液化判别的基础上利用有效应力动力分析方法对坝基土体进行了考虑渗流和不考虑渗流的地震液化的非线性动力有限元分析,并将液化的判别结果与现场标贯试验、室内动三轴试验的判别结果进行对比,从中得出一些有益的结论,可供类似工程参考。
3) liquefaction estimation
液化判别
1.
Combining with the engineering practice in Nanjing and empirical formulas at home and abroad,the calculating method of the critical horizontal stress index(K_(Dcr)) is put forward;moreover,the liquefaction estimation and calculation of liquefaction grade are made by this method.
结合南京的工程实践和国内、外的经验公式,提出了临界水平应力指数(KDcr)的计算方法,并以此来进行液化判别和计算液化等级。
2.
Based on CPT(qc, Rf ) tests in eleven representative engineerings, liquefaction estimation of sandy soils with thin clay interlayer in Shanghai area is studied.
通过对11项典型工程场地进行原位取土及双桥静力触探原位测试分析,重点研究了上海地区薄层粘性土(或粘质粉土)夹层对液化判别的影响,统计分析了锥尖阻力qc、摩阻比Rf与土层粘粒含量的相关关系,提出了完全依据双桥静力触探试验的地基液化判别方法,在工程应用中取得了显著经济效益。
3.
With this formula, a set of soil parameters from DMT indices could be inferred for foundation design, compaction control, liquefaction estimation, and so on.
扁铲侧胀试验是一种非常有用的原位测试方法,通过对上海地区的几项扁铲侧胀试验资料的整理和分析,把国外的经验与本地土性结合,选择适合本地区的公式,从扁铲指数获得一系列符合实际的土工参数,为基础设计、压密控制、砂土液化判别等方面提供依据。
4) evaluation liquefaction
液化判别
1.
In this paper, combined with the engineering experience, the problems in evaluation liquefaction such as the groundwater level, cladding earth pressure and level of liquefaction are discussed, and the settlements of the problems are given.
文中结合工程经验,对地基土液化判别时地下水位取值、上覆土压力取值和液化等级综合判别时所遇到的问题进行探讨,以供工程师们工程实际使用,同时也给规范修编单位提供参考。
5) liquefaction criterion
液化判别标准
1.
Systematic laboratory tests on loess liquefaction are performed to study the testing methods,liquefaction mechanism,liquefaction criterion,influence factors and development of pore pressure and strain.
基于室内试验,对黄土液化的试验方法、液化机理、液化判别标准、影响液化的因素、孔压和应变的发展特点等问题进行了系统的研究。
6) estimating liquefaction of deep-level sandy soils
深层土液化判别
补充资料:里雅普诺夫判别定理
见运动稳定性。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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