利用浮石合成13X型分子筛最佳工艺条件的研究

以吉林省长白山地区的天然浮石为原料，成功地合成了１３Ｘ型分子筛，对其合成路线，反应条件进行了研究，确定了合成１３Ｘ型分子筛的最佳工艺条件，并通过Ｘ射线衍射法及差热分析等手段证明了产物的结构     

北京地质大厦景观石的地质特征

北京地貌呈现"北京湾"特征,北山产铁,西山产煤,平原产地热。地质大厦院内东侧花坛摆放代表地球从老到新5个代(宙)的岩石,西侧花坛摆放阳坊花岗岩,体现了地质学为首都城市发展的贡献。太古代密云岩群表壳岩铁矿曾为首钢铁矿的主要原料,元古代雾迷山组汉白玉大理岩曾用于古都北京的建设,古生代马家沟组石灰岩中流出了优质饮用水,中生代窑坡组煤矿使西山成为中国地质工作的摇篮,新生代马兰黄土是中国最早研究的黄土,中生代形成的阳坊花岗岩曾用于北京1959年十大建筑的基石。     

Underwater Explosion Treatment of Marine Soft Foundation

The consolidation of soft foundation is a problem that commonly appears in harbor construction engineering on muddy coast. Introduced in this paper is the experimental study on underwater explosion treatment of soft foundation, including the regulations of explosion hollow development and medium movement, the law of similarity of densification and settlement of filled stone mass by shock wave pressure and explosion energy and their construction technologies, etc. A number of projects have been completed by applying this new technique, and the technique itself has been proved practicable.     

of regular and irregular waves from a partially perforated caisson breakwater with a rock-filled core

The reflection of regular and irregular waves from a partially perforated caisson breakwater with a rock-filled core is examined. The present mathematical model is developed by means of the matched eigenfunction method. Numerical results of the present model are compared with the experimental data of different researchers. Numerical examples are given to examine the effect of rock fill on the reflection coefficient. The differences between regular and irregular waves are also investigated by means of theoretical and experimental results. It is found that the minimum reflection coefficient of irregular waves is larger than that of corresponding regular waves, but the contrary is the case for the maximum reflection coefficient.     

Patterned ground formation and penetrative convection in porous media

Abstract

A theoretical explanation is advanced consisting of a five stage process for the formation of polygonal ground which consists of stone borders forming regular hexagons and soil centres. One of these stages, namely the onset of convection in a porous soil between temperatures of 0°C and approximately 4-6°C, is studied analytically. Darcy's law is employed but variable permeability is allowed for and a parabolic density dependence on temperature is assumed. It is found that the theoretical predictions of the aspect ratio agree very well with field studies when a constant upper surface heat flux condition is imposed and an upwardly stratified permeability is chosen. Field study data, which agree very well with the theory, are reported in detail.     

冲孔灌注桩桩孔纠偏预防技术研究及应用

冲孔灌注桩虽然在各类地层都具有广泛的适用性,但是在复杂地质条件下,极易发生偏孔。结合某高层建筑冲孔灌注桩施工中频繁偏孔的情况,对冲孔过程中的偏孔问题进行全面分析研究。以桩孔纠偏预防为目标,从应对孤石和斜硬岩层2个方面来针对性进行研究,应对孤石时,合理控制钻头、冲程及冲孔频率;应对斜硬岩层时,研究了钻头增厚硬质合金块改进技术。经现场应用,有效地避免了偏孔的产生。     

强夯法在吹砂填海地基加固中的应用分析

通过强夯法在首钢京唐曹妃甸钢铁公司吹填砂地基处理工程中的应用情况和成功经验,对强夯设计、施工参数、加固效果进行了分析,为相似工程提供参考。     

贵州关岭大寨崩滑碎屑流灾害初步研究

2010年6月28日,贵州省关岭县岗乌镇大寨村发生特大型崩滑碎屑(石)流灾害,造成99人死亡或失踪。通过现场考察崩滑区的地质环境与斜坡岩体结构,认为斜坡体由似"干砌块石结构"的裂隙化岩体组成是发生崩溃式破坏的主要内在原因。超常暴雨(过程雨量237mm)条件下斜坡岩体后缘裂缝充水形成持续的"水楔作用"是斜坡岩体松动、倾倒垮塌的主要外部引发因素。碎屑(石)流块度的空间分布具有从源头向沟口逐次减小,碎屑(石)流运动冲击高度逐步降低,冲击速度逐步减小,并显示4个能级4个冲程的特点。根据动势能守恒定律,计算了每个冲程的最大速度,得出第1冲程为高速崩滑,其它冲程属于碎屑(石)流动冲击。未发现区域天然地震、光照水库诱发地震与外围历史采矿活动与本次事件相关的直接证据。由于滑坡后缘仍存在不稳定岩体,碎屑(石)流堆积体上多处分布直径3～5m的堰塞塘,说明碎屑(石)空隙的排泄能力不足,在未来暴雨条件下引发新的崩滑或形成沟谷型泥石流的可能性是存在的。     

信息化设计施工在机场高填方边坡工程中的应用

信息化设计施工是一种动态的设计施工方法,通过施工过程中的施工信息,掌握工程岩土体的工作状态,从而调整优化初始设计施工方案。本文分析了机场高填方边坡的主要施工信息,提出了信息化设计施工的工作模式,并以西南某机场扩建工程为例,介绍了机场高填方边坡信息化设计施工的实际工程应用。这种设计施工模式在实际工程中取得了较好的应用效果。