首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   8篇
  完全免费   1篇
  教育   9篇
  2018年   1篇
  2014年   1篇
  2013年   1篇
  2011年   1篇
  2008年   2篇
  2004年   2篇
  2000年   1篇
排序方式: 共有9条查询结果,搜索用时 62 毫秒
1
1.
2D and 3D stability analysis of slurry trench in frictional/cohesive soil   总被引:1,自引:0,他引:1  
A 2D and 3D kinematically admissible rotational failure mechanism is presented for homogeneous slurry trenches in frictional/cohesive soils.Analytical approaches are derived to obtain the upper bounds on slurry trench stability in the strict framework of limit analysis.It is shown that the factor of safety from a 3D analysis will be greater than that from a 2D analysis.Compared with the limit equilibrium method,the limit analysis method yields an unconservative estimate on the safety factors.A set of examples are presented in a wide range of parameters for 2D and 3D homogeneous slurry trenches.The factor of safety increases with increasing slurry and soil bulk density ratio,cohesion,friction angle,and with decreasing slurry level depth and trench depth ratio,trench width and depth ratio.It is convenient to assess the safety for the homogeneous slurry trenches in practical applications.  相似文献
2.
This paper presents a new method (GA-ANN) developed by combining genetic algorithm (GA) and artificial neural networks (ANN) for determining parameters of soils and retaining walls of deep excavation. This method has the advantages of nonlinear projection of neural networks, networks reasoning, prediction and good overall characteristics. it was first used for back analysis of the problem of mechanics parameters for excavation. Case studies showed that the GA-ANN method is effective and practical for back analysis of determining parameters. Project supported by NSFC(5973860) and National Civil Defence fund of China  相似文献
3.
论述混凝土地下连续墙的特点及其应用,阐述施工过程中地下连续墙混凝土浇筑质量的影响因素,对常见的地下连续墙混凝土浇筑的质量问题进行分析,并提出相应的质量控制措施及设计优化方案。  相似文献
4.
本文对地下连续墙设计过程中的钢筋网保护层、钢筋网接头、钢筋网预埋件、墙体锚固深度、槽底清孔等各个环节中影响连续墙质量的一些问题进行了探讨。  相似文献
5.
According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel,the monitoring project of the vibration of the existing tunnel induced by the blasting construction is put forward,which includes the sensors' location,monitor method and the vibration monitoring system.Based on the monitoring data of the explosion vibration,the vibration wave forms,velocities,acceleration responses,main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quantities.According to the safety-judging standard of explosion vibration,the conclusion that the existing tunnel is safe under the explosion vibration is then drawn.Furthermore,the spectrum characteristics of three explosion vibrations and the spectrum changing properties of explosion vibration wave transmitting in different directions are concluded,which can provide reference to similar projects.  相似文献
6.
According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel, the monitoring project of the vibration of the existing tun-nel induced by the blasting construction is put forward, which includes the sensors’ location, moni-tor method and the vibration monitoring system. Based on the monitoring data of the explosion vibration, the vibration wave forms, velocities, acceleration responses, main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quanti-ties. According to the safety-judging standard of explosion vibration, the conclusion that the exist- ing tunnel is safe under the explosion vibration is then drawn. Furthermore, the spectrum character-istics of three explosion vibrations and the spectrum changing properties of explosion vi-bration wave transmitting in different directions are concluded, which can provide reference to similar projects.  相似文献
7.
This paper presents a case study on an ultra-deep diaphragm wall with a depth of 110 m constructed in Ningbo City. The in-situ application shows that using Bauer BC40 cutter machine in conjunction with cutter wheels specified for different strata would be qualified for constructing the 110 m diaphragm wall with high efficiency and precision given that the quality of slurry and poured concrete can be guaranteed. The ground settlement can be effectively controlled by using the overlapping construction method. Sliding failure as a whole characterized by pronounced lateral deformation is likely to occur in the upper muddy clay layer due to its high compressibility and sensitivity. In contrast, local collapse of trench walls tends to happen in the sandy silt strata. Furthermore, careful attention should be paid to sandy silt during the entire construction period as the vertical displacement of the sandy silt continues to develop even after concrete pouring  相似文献
8.
用有限元方法模拟了某大桥锚碇基础深基坑开挖过程。模拟结果表明圆形地下连续墙的拱效应有效地减少了墙体的侧移;施工误差对结构受力和变形有重要影响;墙体嵌岩部分拉应力和压应力都很大。所得出的结论为此类基坑支护结构设计和施工提供了理论依据和实践参考。  相似文献
9.
鉴于发生多起地铁车站支护结构失效的重大事故,分析其支护结构失效机理与控制方法,采用空间建模研讨地铁车站深基坑开挖过程中支护结构对外界干扰的承受极限。  相似文献
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号