岩质边坡植被抗冲刷现场试验研究

阐述了岩质边坡生态防护植被现场抗冲刷试验的试验目的,详细介绍了其试验方案及现场试验方法。通过对试验区草种生长情况的评判,对试验区草种抗冲刷能力的测试,对适宜广西寨任路边坡防护的草种进行了比选,对不同草种抗冲刷能力进行了探讨。通过对试验数据的分析,得到了不同草种在不同降雨强度下与边坡冲刷的关系,为岩质边坡生态防护植被的选择提供了依据。     

Benthic habitat quality assessment of an oxygen stressed fjord by surface and sediment profile images

In May and October 1994 the benthic habitats in Havstensfjord (26 km²), a seasonally oxygen stressed stratified fjord, were classified by taking sediment surface and sediment profile images (SPI) at 90 stations, randomized into nine strata. Qualitative grab samples for faunal inspection were taken at about of the stations in both May and October to help to identify objects in the images. The images give information on sediment characteristics (texture, oxic/anoxic conditions, lamination) which often can be related to functional properties of the macrofauna (burrows, tubes, feeding voids, reworked sediment) or to observations on benthic epifauna. In combination, such variables mirror the quality of the benthic habitat. Analysis of sediment profile images was done with multivariate methods [Benthic Habitat Quality (BHQ) index] and univariate statistical methods to describe differences between areas and depths. Variance analysis of BHQ indices indicated a significant interaction between area and depth. In both the northeast and northwest strata the oxygen stress had induced a habitat degradation at depths deeper than 25 m compared to shallower northwest and northeast strata and all south depth strata. No significant difference in mean BHQ index was found between May and October. We discuss the potential application of the SPI technique for efficient monitoring oxygen stressed marine coastal areas.     

浅析黄土高边坡变形破坏的基本形式及其机理

本文对黄土高边坡变形破坏的基本形式及其机理进行了分析,指出其破坏形式有坡面冲刷、坡面剥落掉块、坡体湿陷变形、崩塌、滑塌、泥流等几种。黄土高边坡变形破坏模式主要有滑塌、滑坡的破坏模式;崩塌破坏模式和坡面破坏模式等三种。     

用锚索地梁整治老集高速公路高边坡地质病害

分析了内蒙古老集高速公路第四合同段高边坡病害成因及相应治理方案,阐述了预应力锚索及地梁施工工艺,指出在处理高边坡病害中预应力锚索地梁特有的有效性和优越性。     

大连港矿石专用码头开挖边坡支护工程实例

大连港矿石专用码头开挖边坡具有地质条件复杂、边坡较高、开挖土石方巨大、边坡支护难度较高、且边坡易受风化等特点,支护设计与施工工作采取了因地制宜的方针,对于部分稳定坡体进行防护锚杆挂网喷砼支护,局部破碎岩体及风化程度较高的边坡采取了预应力锚索挂网喷砼支护的手段;结合场区整体排水系统,坡顶设置截水沟,坡面设置泄水孔,平台设置截水墙,特殊坡面设置急流槽,坡脚设置排洪沟,并将排水系统与场区内排水终端相连接,边坡绿化经过分析对比,采用适合大连本地区环境的绿化方案;综合各种支护措施,确保大连港矿石专用码头开挖边坡的稳定。     

参数随机性对公路边坡结构安全指标的影响分析

利用概率理论和随机摄动理论研究了土体粘聚力、摩擦系数和重度随机变化时对边坡结构安全系数和可靠指标的影响规律。结果发现，随着这三个参数变异性的增大，安全系数具有线性变化规律，且摩擦系数的变异性对安全系数的影响最大，粘聚力次之，重度最小；而可靠指标却具有先陡降后缓降的变化趋势，且粘聚力和摩擦系数向负方向扰动时对可靠指标的影响比其向正方向扰动时大，但重度对可靠指标的影响规律与前者相反。     

基于Monte-Carlo模拟的公路黄土高边坡可靠性研究

本文分析了Monte-Carlo模拟法的基本原理,建立了基于简化Bishop圆弧法的极限状态方程;以陕西公路某黄土路堑高边坡为例,分析了模拟次数、计算模型以及土性参数的变异系数对可靠指标的不同影响,从而为公路黄土路堑高边坡可靠性分析提供了参考依据。     

浅谈恒山旅游公路边坡整治方案与施工方法

分析了恒山旅游公路边坡的现状和整治的必要性，介绍了采用覆盖式钢索网和钢丝网边坡防护系统的方案。     

路面铣刨机铣削转子驱动马达工作负荷计算分析

通过对沥青路面常温破坏机理以及路面铣刨机刀具铣削阻力的分析，利用冲量定理．推导出铣刨机铣削转子驱动马达工作负荷的计算公式，为铣削转了驱动马达提供选型依据。     

皖赣线K312边坡坍滑预应力锚索整治

通过对皖赣线K3 12路基病害的成因及地质情况的分析 ,介绍病害形成的机理及整治措施、预应力锚索加固边坡的整治方案及实施效果。