多种工艺复合土钉墙在窄小场地深基坑中的应用

在窄小施工场地，采用搅拌桩套打钻孔灌注桩止水、土钉拉锚的复合施工工艺作围护，同时针对工程难点，制定了相对的技术措施，保证了工程安全，也取得了较好的经济效果。     

Features of Water Origin on the Planet Earth. New Aproaches to the Assessment of Water Quality

issues of origin of water on the planet Earth and hypotheses of hydrosphere genesis have been dealt with. The article underscores interrelationship between the quality of drinking water and the level of evolution of human intellect. Substantiated is the principled insufficiency of assessing the drinking water using only chemical and microbiological methods of control. The research showed the necessity of introducing new standards for drinking water taking into consideration its safety at the cytogenetic level. The article has analyzed problems of obtaining high quality drinking water and methods of its decontamination. For the first time we demonstrated that chlorinated tap water is the medium habitat of hazardous for humans of nonculturable, but viable pathogenic forms of microflora.     

Heavy metals in maternal and cord blood

Heavy metal concentrations have been determined in maternal and cord blood samples collected from mothers in the age group 20-25 years with full-term neonates (37-40 weeks). The concentrations of Pb, Cd, Cu and Zn were found to be low in cord blood as compared to mother's blood and the ratio between cord blood and maternal blood for the respective elements was found to be approximately 0.80, 0.86, 0.47 and 0.40. On the other hand, the concentrations of Fe and Mg in the mother's blood were found to be lower than those in the cord blood. Prenatal exposure to lead in Mumbai, though low (5.1 microg/dl), is approximately 2-3 times higher than that observed in Canada or Italy. A strong correlation (r = 0.79) between the maternal and cord blood lead levels has been observed during the present study.     

Seismic methods for study of soil building properties

Bulletin of Engineering Geology and the Environment - Information about distribution of elastic wave propagation velocities Vp, Vs in the subsurface zone of a soil mass can be obtained rapidly and...     

城市防渍减灾规划思考

防治城市渍水应走出“重排不重防”的误区,应积极研究开发“基于GIS的城市防渍减灾决策支持系统”,并建立生态性的城市防渍规划体系     

Glowing connections

This paper gives the results of a series of experiments and how they shed light on problems of electrical fires. Experimental glowing connections were made by allowing wires to make poor contact with another object in series in a circuit. Note: The information in this paper was presented in the course “Electrical fires” at the University of Wisconsin—Extension, Madison, Wisconsin, April 1982.     

一类二阶泛函微分方程 x″(t)+f(t,x(g(t)))·Φ(x′(h(t)))=0的振动性

关于方程 x″(t)+f(t,x(g(t))·Φ(x′(h(t)))=0的振动性给出若干判别定理,判别准则均采用了形如 integral from n=1 to ∞ (f(t,c)dt),integral from n=1 to ∞ (tf(t,c)dt)的积分的敛散性.James.S.W.Wong 分别研究了方程 x″(t)+f(t,x(t))=0,x″(t)+a(t)f(x)g(x′)=0.笔者只要求Φ(y)>0,在其它条件相当情况下.推广了文[1]中相应结果.同时也推广了文[2]中定理1.而条件Φ(y)>0比文[2]中所给出的条件0相似文献   

某排污工程软土地基处理方案的优化

从技术、安全、经济等方面，通过对深圳市某排污工程软土地基处理的四种方案的综合对比，说明了在大型工程中合理选择方案的重要性。仅在该工程中的W133-W143采用格栅状双头喷浆搅拌方案代替原设计的单头喷粉方案就为国家节约大量投资。