三峡永久船闸高边坡监测成果及稳定性分析

为保证三峡永久船闸高边坡施工期和运行期的安全,布置了比较齐全的监测项目和监测设施。监测资料分析表明,边坡整体稳定性良好。局部块体失稳是边坡的主要破坏形式,采取适当的加固处理措施后可保证其稳定性。二闸室至三闸首中隔墩顶部产生并一度发展的裂缝,随着闸槽开挖结束而呈明显的收敛趋势。边坡岩体时效变形量值不大,持续时间不长,预计不会影响船闸人字门的正常运行     

贵定露天石灰石矿不稳定边坡的治理

着重讨论了贵定石灰石矿边坡１２２０～１１８０ｍ水平在Ｉ号剖面左右深层不稳定地段的边坡治理方案。推荐方案强调多台阶同时回采，以推迟靠帮，进而推迟可能的表层滑坡治理。还讨论了护坡矿壁回收及该矿其他不稳定地段边坡治理等问题。     

边坡可靠性分析的非线性有限元正交设计算法

非线性有限元正交设计算法，是借助于回归分析，用正交多项式拟合各岩石力学特性参数与各单元滑移面及岩体整体滑动安全余量间的函数关系，以评判边坡工程的可靠性。该法较蒙特卡罗法精度高，能满足工程计算的精度要求，且方法简单、计算时间少，不需改变有限元法的有关方程和计算程序，易为人们接受。     

Exploring a Bayesian hierarchical approach for developing safety performance functions for a mountainous freeway

While rural freeways generally have lower crash rates, interactions between driver behavior, traffic and geometric characteristics, and adverse weather conditions may increase the crash risk along some freeway sections. This paper examines the safety effects of roadway geometrics on crash occurrence along a freeway section that features mountainous terrain and adverse weather. Starting from preliminary exploration using Poisson models, Bayesian hierarchical models with spatial and random effects were developed to efficiently model the crash frequencies on road segments on the 20-mile freeway section of study. Crash data for 6 years (2000–2005), roadway geometry, traffic characteristics and weather information in addition to the effect of steep slopes and adverse weather of snow and dry seasons, were used in the investigation. Estimation of the model coefficients indicates that roadway geometry is significantly associated with crash risk; segments with steep downgrades were found to drastically increase the crash risk. Moreover, this crash risk could be significantly increased during snow season compared to dry season as a confounding effect between grades and pavement condition. Moreover, sites with higher degree of curvature, wider medians and an increase of the number of lanes appear to be associated with lower crash rate. Finally, a Bayesian ranking technique was implemented to rank the hazard levels of the roadway segments; the results confirmed that segments with steep downgrades are more crash prone along the study section.     

鄂西宜昌斜坡区寒武系页岩储层发育特征——以鄂宜页1井为例

以获得重大突破的鄂宜页1井为研究对象,对寒武系水井沱组黑色页岩进行了有机地球化学、矿物X射线衍射、场发射扫描电镜及核磁共振分析等测试,研究了鄂西宜昌斜坡区页岩储层的发育特征。该区页岩主要由黏土矿物、石英和碳酸盐矿物组成,由浅至深表现出黏土矿物和碳酸盐矿物逐渐减少、石英含量逐渐增加的趋势,总体上显示出\"高钙低硅\"特征;页岩的孔隙度与有机碳含量表现出正相关性,尤其有机碳含量大于2.0%的层段,页岩孔隙度随有机碳升高而增大明显;页岩孔隙以微孔和小孔为主,小孔和中孔对孔隙度贡献明显;页岩中脆性矿物内的孔隙对页岩基质孔隙的贡献稳定,而有机质孔和黏土矿物层间孔隙的贡献与其各自含量变化相关,随深度的增加有机质孔贡献逐渐升高,而黏土矿物层间孔隙贡献逐渐降低。     

岩体质量的可拓学评价方法在边坡工程中的应用

可拓工程评价方法是在解决矛盾问题的过程中，既可利用物元的可拓性确定定性因素，又可利用可拓集合论，通过关联函数可取负值这一特点进行定量计算，使评价方法能较全面地分析对象属于集合的程度，较好地解决了岩体质量评价中定性与定量因素综合评价的问题。     

Automatic prediction of time to failure of open pit mine slopes based on radar monitoring and inverse velocity method简

Radar slope monitoring is now widely used across the world, for example, the slope stability radar (SSR) and the movement and surveying radar (MSR) are currently in use in many mines around the world. However, to fully realize the effectiveness of this radar in notifying mine personnel of an impending slope failure, a method that can confidently predict the time of failure is necessary. The model developed in this study is based on the inverse velocity method pioneered by Fukuzono in 1985. The model named the slope failure prediction model (SFPM) was validated with the displacement data from two slope failures monitored with the MSR. The model was found to be very effective in predicting the time to failure while providing adequate evacuation time once the progressive displacement stage is reached.     

谈谈农业银行麻栗坡支行迁建工程的边坡治理

针对边坡岩体风化不均、破碎易失稳的工程地质特征,在边坡治理过程中,及时调整施工方案及施工措施,使边坡施工得以顺利进行,取得了较好的经济效益和社会效益。     

航运码头边坡影响因素分析及影响规律研究

在以往的航运码头工程建设中,由于码头工程结构复杂、自重大、受力集中等特性,往往给码头地基基础造成极大的负担,严重影响航运码头边坡的稳定性,本文在此背景下,结合二维数模计算结果以及大量实测资料,对航运码头边坡影响因素及影响规律进行了详细的分析与研究,本文研究结论可为同类工程提供重要的参考与借鉴,具有十分重要的意义。