西江路堑大滑坡成因分析与处理     

凌浩美  程剑云 《江西地质》2001,15(3):216-220

在323国道施工过程中，由于发生了西江大滑坡，给施工进度带来影响。本文对西江大滑坡产生的原因进行了分析，并提出了具体的处理方案，对以后类似问题的处理具有一定的参考价值。  相似文献   

芜湖市航运局综合楼地基处理失误诱发地面塌陷的治理     

孙凤贤 《安徽地质》2001,11(3):230-234

论述航运局综合楼地基所在处的地形地貌、水文地质、工程地质条件；分析地基基础盲目施工诱发造成建筑场地工程地质灾害和危及周国民居安全的原因，提出防治措施，合理施工，治理塌陷，并取得较好效益。  相似文献   

活性白云粉生产工艺及其物化性能研究   总被引：1，自引：0，他引：1  

贾建业  汤艳杰  王辅亚  王杨传  宁平  王建成  魏俊峰 《矿物学报》2001,21(3):439-442

活性白云粉（ABP）是在白云岩经过破碎、细粉碎、表面改性的基础上得到的一种新型改性功能填料。本文利用河南辉县市的拍石头和张村两地产出的白云岩作为实验原料，对其表面改性的实验方法、改性剂选择及用量、改性条件及改性效果等方面进行了一定的探讨，并且对改性前后的白云石粉体的粒度、比表面积等性能及红外光谱特征做了对比研究。生产工艺和物性测试研究表明：活性白云粉代替轻质碳酸钙作橡胶填料前景广阔；与轻钙相比，活性白云粉的粒度不够均匀，经优化和改善生产工艺条件，可望进一步提高其应用价值。  相似文献   

蛭石尾砂在燃煤固硫除尘中的利用   总被引：8，自引：1，他引：8       下载免费PDF全文

李金洪  鲁安怀  陈从喜  郑喜珅 《岩石矿物学杂志》2001,20(4):515-519

在对新疆且干布拉克蛭石矿尾矿进行矿物学研究的基础上，进行了高温膨胀实验、结果表明，蛭石尾砂的膨胀倍数因粒度的增大、时间的延长而提高，较为理想的膨胀温度在950～1050℃之间，利用碳酸钙为固硫剂、膨胀土为粘结剂，蛭石尾矿为膨胀添加剂对肥城烟煤进行高温燃煤固硫实验。结果表明，蛭石尾砂能较大幅度地提高肥城烟煤的固硫率，经XRD、SEM和EDX等分析表明，燃煤灰渣的主要固硫物相为硫酸钙，且因燃烧条件、添加剂和燃煤种类的差异而以不同的形态存在。蛭石尾砂对燃煤固硫促进机理可解释为营造型煤内部氧化气氛，抑制新物相硫酸钙的分解。  相似文献   

无网格伽辽金法应用的参数选择及内部边界处理   总被引：8，自引：0，他引：8  

张延军  张晓炜 《工程地质学报》2001,9(3):321-325

无网格辽金法作为-种新的岩土工程数值计算方法, 该法其只需节点信息的无单元特性, 使其具有计算优势。本文结合固结EFGM刚度矩阵公式, 对不同的计算参数进行计算分析, 找出其影响规律。并采用跳跃函数处理内部边界条件, 计算结果表明, EFGM处理内部场函数不连续是准确的。  相似文献   

Post-earthquake investigation on several geosynthetic-reinforced soil retaining walls and slopes during the Ji-Ji earthquake of Taiwan   总被引：1，自引：0，他引：1  

Hoe I. Ling  Dov Leshchinsky  Nelson N. S. Chou 《Soil Dynamics and Earthquake Engineering》2001,21(4):3087

This paper gives an overview on the application of geosynthetic-reinforced soil structures in Taiwan. Taiwan has an unique topography and geotechnical conditions that rendered a less conservative and more challenging design compared to that of North America, Europe and Japan. The Ji-Ji (Chi-Chi) earthquake of 1999 gave an opportunity to examine the behavior of reinforced soil structures. The performance of several modular-block reinforced soil retaining walls and reinforced slopes at the vicinity of the fault was evaluated. Reinforced structures performed better than unreinforced soil retaining walls. The failure cases were highlighted and the cause of failure was identified. The lack of seismic design consideration could be a major cause of failure. The compound failure mode, the inertia force of the blocks, and the connection stiffness and strength relative to the large dynamic earth pressure, were among major items that would warrant further design consideration.  相似文献   

Inelastic buildings with tuned mass dampers under moderate ground motions from distant earthquakes     

P. Lukkunaprasit  A. Wanitkorkul 《地震工程与结构动力学》2001,30(4):537-551

The effectiveness of tuned mass dampers (TMD) in vibration control of buildings was investigated under moderate ground shaking caused by long‐distance earthquakes with frequency contents resembling the 1985 Mexico City (SCT) or the 1995 Bangkok ground motion. The elastic–perfectly plastic material behaviour was assumed for the main structure, with linear TMDs employed by virtue of their simplicity and robustness. The accumulated hysteretic energy dissipation affected by TMD was examined, and the ratio of the hysteretic energy absorption in the structure with TMD to that without it is proposed to be used, in conjunction with the peak displacement ratio, as a supplementary TMD performance index since it gives an indication of the accumulated damage induced in the inelastic structures. For the ground motions considered, TMD would be effective in reducing the hysteretic energy absorption demand in the critical storeys for buildings in the 1.8–2.8 s range. The consequence is reduction in damage of the buildings which would otherwise suffer heavy damage in the absence of TMD, resulting in economical restorability in the damage control limit state. This is of practical significance in view of the current trend toward performance‐based design. Copyright © 2001 John Wiley & Sons, Ltd.  相似文献   

酸性富水软土地基对深层搅拌法加固效果的影响   总被引：1，自引：0，他引：1       下载免费PDF全文

吴翔  邓坤峰 《探矿工程》2001,(2):7-9

针对工程中出现的深层搅拌桩深部桩身质量不合格问题，结合水泥系深层搅拌法加固地基的作用机理，分析探讨了酸性富水地基土对水泥土凝结强度的不利影响，提出了改进意见。  相似文献   

Estimation of Hourly and Daily Global Solar Radiation at Clear Days Using an Approach Based on Modified Version of Gaussian Distribution     

S. M. El shazly 《大气科学进展》1996,13(3):349-358

The performance of two models,Jam and Baig,based on the modified version of Gaussian distribution function in estimating the daily total of global solar radiation and its distribution through the hours of the day from sunrise to sunset al any clear day is evaluated with our own measured data in the period from June 1992 to May 1993 in Qena Egypt The results show a high relative deviation of calculated values from measured ones,especially for Jain model,in the most hours of the day,except for those near to local noon.This misfit behavior is quite obvious in the early morning and late afternoon A new approach has been proposed in this paper to estimate the daily and hourly global solar radiation This model performs with very high accuracy on the recorded data in our region.The validity of this approach was verified with new measurements in some clear days in June and August 1994.The resultant very low relative deviation of the calculated values of global solar radiation from the measured ones confirms the  相似文献   

威海市“海联大厦”强夯法处理高填土,松软土地基工程实录   总被引：1，自引：1，他引：1  

龙岩峰  高贵才 《岩土力学》1995,16(1):78-83

强夯法处理地基在我国应用发展已有十几年的历史，本文介绍的威海市“海联大厦”地基处理工程，以较大的吨位及能级进行高填土、松软土地基处理取得成功，成为威海市首例以较大吨位及能级强夯处理地基工程，文中着重介绍了方案选择、强夯设计、强夯施工及效果检测情况，综合地进行了技术、经济效果评价。  相似文献