岩石单轴抗拉强度的几何形状效应研究

提出了一种模拟岩石破坏过程的细胞自动机模型,以力、位移作为基本状态变量,基于基本的力学规律构造了细胞自动机模型的矢量局部更新规则,克服了以往规则确定随意性以及标量化的缺点。利用该模型模拟了岩石的单轴破坏过程,研究了非均质性对单轴直接拉伸破坏过程的影响,并研究了几何形状（长宽比）对单轴拉伸强度的影响,研究结果加深了对岩石单轴抗拉强度的了解,对试验有一定的指导作用,应进一步加强岩石的直接拉伸试验研究。     

预应力锚索锚固作用机理的数值模拟研究

在探讨预应力锚索现场足尺试验实施难点的基础上,利用FLAC3D对预应力锚固体的应力、位移特点,不同的锚索刚度、岩土体弹性模量以及预应力大小对锚固体剪应力的分布规律的影响、塑性破坏区的转移趋势进行了数值模拟,拟合了剪应力呈指数函数关系的分布公式。在剪应力峰值不断向锚固端扩展的推断下,提出了注浆体接触面处的锚索极限锚固力的计算公式,具有一定的理论和实践意义。     

高边坡压力分散型预应力锚索施工工艺研究

压力分散型预应力锚索由于具有较多优点而在复杂高边坡加固工程中应用得越来越广泛,施工中结合边坡岩体性质和设备条件,科学合理地选择施工工艺是其取得理想效果的关键环节。结合金－丽－温高速公路17标段工程实例,从施工组织、现场试验、钻孔、注浆、张拉、监测等方面对压力分散型预应力锚索施工工艺进行了详细论述,为类似工程提供一些借鉴经验。     

Surface Tension Effects of Humic-Like Substances in the Aqueous Extract of Tropospheric Fine Aerosol

Organic aerosol constituents can influence the surface tension of nucleating cloud droplets and thereby modify the critical supersaturation necessary to activate aerosol particles. Model calculations, based on experiments carried out with different surrogates, led to contradictory conclusions on the effect of organic components on activation, indicating that the results depend very much on the surrogate selected. In order to reduce this uncertainty surface tension measurements were performed on real atmospheric aerosol components. Humic-like substances (HULIS) that accounted for 60% of the water-soluble organic carbon present in rural aerosol were isolated from 32 samples covering different seasons. The isolated organic matter present in a concentration of about 1 g L^–1, decreased the surface tension of the aqueous solutions by 25–42% as compared to pure water. This effect was further enhanced when humic-like substances were mixed with ammonium sulphate. In order to support model calculations Szyskowski functions were fitted to the data to formulate the surface tension effect as a function of concentration.Finally, natural humic substances (fulvic and humic acids) were investigated under the same conditions. The experiments revealed that the surface tension decreasing effect of atmospheric humic-like substances differed from that of the studied terrestrial and aquatic humic substances: the latter substances decreased the surface tension of the aqueous solution to a lesser extent (7–23%) than atmospheric HULIS. This deviation can be explained with the different composition (e.g. the ratio of aromatic to aliphatic moieties) of the substances investigated.     

Interfacial tension studies between Fe-Cu-Ni sulfide and halo-norilsk basalt slag system

There are a lot of mafic and ultra-mafic bodies in the earth,but only a few of them include Cu-Ni-PGE deposits.Of interest has been the formation of such deposits as Cu-Ni-PGE sulfide;especially the separa-tion of sulfide liquid from silicate melts.A lot of re-searcher[1—11]have investigated into the tectonic back-ground of Cu-Ni-PGE deposits,the mechanism of the origin and evolution of magma,and the metal element partition coefficient in sulfide liquid and silicate magma.However,the da…     

青海平（安）-阿（岱）高速公路高边坡整治工程

论文以平-阿高速公路K29＋024．5～K29＋210．5段高边坡病害整治工程为例，介绍其整治工程措施及施工技术。包括预应力锚索框架梁、预应力锚索地梁、护面墙等，并对制作锚索、搭设工作平台、锚索孔成孔、锚索安放入孔、注浆、锚索框架、锚索地梁、张拉锁定、封锚头、拱形护坡、护面墙及排水沟整治施工工艺进行了总结。结果表明，采用以预应力锚索框架梁、地梁为主的边坡整治措施，可使边坡潜在滑坡体的自重力在预应力锚索施工的外力作用下均匀分布在边坡上，从而使边坡处于稳定状态，这种边坡病害整治地形、地质条件适应力强．施工条件易得到满足，具有良好的技术经济效果。     

压力分散型预应力锚索在高边坡加固中的应用

介绍了长珲公路的工程及地质概况、压力分散型预应力锚索在该工程中的应用、作用机理、施工工艺及张拉实验。     

锚索施工中的事故处理与注浆改进

介绍了锚索施工中埋钻的处理方法，通过改进钻头、反打、侧钻、改进钻杆、保守钻进，针对性地解决和避免了埋钻堵钻情况；还介绍了一些注浆方法的改进，旨在解决严重漏浆情况和使锚固段注浆更充分。     

自承载式预应力锚索现场试验研究

自承载式预应力锚索是一种不需要注浆即可进行张拉锁定的拉压复合型预应力锚索,适合于滑坡灾害应急抢险的快速锚固工程施工。本文结合现场试验数据,分析了自承载式预应力锚索的张拉力、锚索应力分布规律,并与普通拉力集中型锚索进行对比,阐明自承载式预应力锚索不仅有不注浆即可张拉发挥快速锚固作用的特点,同时自承载式预应力锚索锚固段的应力分布均匀,能充分发挥锚固段全长的锚固作用。