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1.
The consolidation behavior of mixed in place cement- and lime/cement-mixed column was studied. Consolidation of the composite
foundation was modeled as a three-dimensional axi-symmetric problem. The authors used the finite difference method to obtain
the pore pressure variation with time at any location below the surface. A computer program developed by the authors was used
to draw some interesting conclusions about the consolidation behaviors of cement- and lime/cement-mixed pile foundation. Finally,
a combined model including the permeability coefficients of cement-mixed piles and soil, was studied and its feasibility was
evaluated.
Project supported by National Natural Science Foundation of China (No. 59908012) and Education Ministry of China 相似文献
2.
Biot's two-phase theory for fluid-saturated porous media was applied in a study carried out to investigate the influence of water saturation on propagation of elastic wave in transversely isotropic nearly saturated soil. The characteristic equations for wave propagation were derived and solved analytically. The results showed that there are four waves: the first and second quasi-longitudinal waves (QP1 and QP2), the quasi-transverse wave (QSV) and the anti-plane transverse wave (SH). Numerical results are given to illustrate the influence of saturation on the velocity, dispersion and attenuation of the four body waves. Some typical numerical results are discussed and plotted. The results can be meaningful for soil dynamics and earthquake engineering. 相似文献
3.
In this work,the dynamic properties of composite cemented clay under a wide range of strains were studied considering the effect of different mixing ratio and the change of confining pressures through dynamic triaxial test. A simple and practical method to estimate the dynamic elastic modulus and damping ratio is proposed in this paper and a related empirical normalized formula is also presented. The results provide useful guidelines for preliminary estimation of cement requirements to improve the dynamic properties of clays. 相似文献
4.
The variation of effective stress ratio of stratfied soil with semi-pervious boundaries and under cyclic loading was analyzed on the basis of Terzaghi's one-dimensional consolidation assumptions. A solution by Laplace Transform was obtained for the case when the soil was under time-varied loading. With numerical inversion of Laplace Transform, some useful results were obtained for several kinds of commonly encountered loadings. The results can be meaningful in engineering practice. 相似文献
5.
Biot's dynamic consolidation equations and Hankel transform were used to derive the integral solutions of stress and displacement for axisymmetric harmonic excitations in the two-phase saturated soil with subjacent rock-stratum. The influence of the coefficient of permeability and loading frequency on the soil displacement at the ground surface were studied. The results showed that higher loading frequency led to more dynamic characteristics; and that the effect of the soil permeability was more obvious at higher frequencies. 相似文献
6.
地方本科院校办学面临的困惑与对策——以温州大学为研究对象 总被引：3，自引：0，他引：3
目前我国有66.07%的地级行政区域设立了地方本科院校,其办学水平如何直接关系到我国高等教育质量。但我国地方本科院校普遍存在诸如人才培养目标定位模糊、缺乏办学特色与标志性教学成果、与地方产业和社会经济发展未能紧密结合等问题。面对困惑,地方本科院校必须树立全新的办学理念,多元化定位应用型人才培养目标,融入并服务于地方产业的转型升级,探索独特的办学机制,同时要凝炼特色,提高办学的影响力和显示度。 相似文献
7.
8.
Stable response of axisymmetric two-phase water-saturated soil 总被引：1，自引：0，他引：1
Biot's dynamic consolidation equations and Hankel transform were used to derive the integral solutions of stress and displacement for axisymmetric harmonic excitations in the two-phase saturated soil with subjacent rock-stratum. The influence of the coefficient of permeability and loading frequency on the soil displacement at the ground surface were studied. The results showed that higher loading frequency led to more dynamic characteristics; and that the effect of the soil permeability was more obvious at higher frequencies. 相似文献
9.
地方大学的使命:服务区域经济社会发展——以温州大学为例 总被引：1，自引：0，他引：1
地方大学在抓好人才培养和科学研究的同时,应该更加凸显社会服务的职能;在更好地为区域经济建设服务的同时,为自身发展赢得更广阔的生存空间。因此,要培养创新型人才,为区域经济社会的发展提供智力保证;促进科研成果转化,加速区域产业的转型升级;拓宽社会服务职能,成为地方经济社会发展中心。创业型大学是地方大学服务区域经济社会发展的延伸。 相似文献
10.
INTRODUCTIONSoftsoilsarewidelydistributedinChinasco-astalareas.The1985earthquakethatinflictedgreatdamagetoMexicoCitysitedonsoftsoilfounda-tionsgreatlyattractedattentionofresearchersandengineersandmovedthemtostudythedynamicpropertiesofsoftsoils.Manyresearcheshavebeendedicatedtothestudyofdynamicpropertiesofsoftsoils.InChina,deepcementmixingmethodshavebeenwidelyusedinthecoastalareas.Theme-chanicalpropertiesofthesecompositefoundationsoilsarenotthesameasthatofundisturbedsoftsoilsorotherkinds… 相似文献