T216节距左、右履带节钻2-20.5孔工艺及工装设计

介绍了在Ｚ３０５０ ×１６ 型摇臂钻床上利用夹具一次性装夹Ｔ２１６ 节距左、右履带节各１ 件后，逐次钻２ － ２０ ．５ 孔的工艺及工装的设计，对其定位元件的选择和操作方法及步骤等作了较详细的论述．     

运用锚引物扩增新城疫病毒鹅源分离株基因组末端序列

在T4 RNA连接酶的作用下,将人工合成的锚引物直接与新城疫病毒（NDV）鹅源毒株ZJ1株的基因组5′末端的反转录产物及NDV基因组3′末端直接相连,然后用聚合酶链反应（PCR）和RT－PCR分别快速扩增基因组5′末端和3′末端,测序结果表明：3′末端的Leader序列为55nt,5′末端的trailer序列为114nt。将该序列与GenBank报道的NDV鸡源毒株的相应序列相比,XJ1株与6个鸡源NDV毒株的Leader和trailer序列的同源性分别为83.6%-92.7%和60.5%-63.2%。序列比较结果表明：该鹅源毒株与鸡源毒株在基因组3′端调控区有较高的同源性,而在基因组5′端的调控区同源性则较低。     

预应力锚索抗滑桩在边坡治理中的应用

抗滑桩、预应力锚索抗滑桩等是当前滑坡治理工程中常用的措施,本文以郴州市流星岭滑坡治理工程实例为背景,对影响边坡稳定性的因素进行了分析,对常用的一些边坡稳定性分析方法适用性及优缺点进行了探讨;并进行了边坡滑体的防治技术分析研究,详细讨论比较了抗滑桩和预应力锚索抗滑桩在滑坡治理中的效果。     

A Determination Method of Anchorage Length of Compression Anchor

The distribution of the axial stress and shear stress on the anchorage segment and the formulation for calculating the anchorage length were derived based on the stress analysis of the anchorage segment of compression anchor. And the effects of parameters, including the elastic modulus, poisson ratio, cohesion, and internal fiction angle of rock mass, on the anchorage length were studied. The results show that the anchorage length decreases with the increase of the elastic modulus, cohesion and internal friction angle of rock mass; and the anchorage length increases linearly but limited with increasing of poisson ratio of rock mass; and it also increases with increasing load.     

Experiment on gas explosion detonated by the pull out (broken) sparks of anchor rope under dynamic loading

By using the specially designed experimental device for anchor rope impact tensile, a series of experiments on the possibility of gas explosion detonated by the pull out (broken) sparks of 15.24 mm, 17.8 mm and 21.6 mm anchor rope have been performed on the condition that the gas concentration and oxygen concentration are within the range of explosion limit. The results show that there are 3 failure forms of anchor rope when it is under the action of dynamic load, i.e. tensile failure, pull out and pull failure, and the breakages all occur in the fixed-anchorage. Using infrared thermal imaging apparatus to measure the temperature of the broken sparks of anchor rope, the result shows that the maximal temperature of the pull out (broken) sparks of anchor rope is far less than the minimum temperature of gas explosion (650~750 ℃) and the existence time of sparks is far shorter than the sensitive period of gas explosion. The sparks induced by any failure forms of 15.24 mm,17.8 mm and 21.6 mm anchor rope can’t detonate the gas.     

北盘江流域增殖放流鱼类的标志方法研究

用荧光标记法和T-tag锚标法标记了体长11.88-13.13cm的长臀鮠Cranoglanis bouderius、光倒刺鲃Spinibarbus hollandi、白甲鱼Onychostoma simus、花 Hemibarbus maculatus（Bleeker）,以寻找适合北盘江增殖放流鱼类的标志方法。14d的标记结果表明：荧光标志法标记的长臀鮠、光倒刺鲃、白甲鱼、花的成活率均在90.0％以上,是一种较为经济实用的标志方法,可在该流域增殖放流使用。需在短时间内回捕的放流对象也可用T-tag锚标法作辅助标志。     

集丹公路K6+606-K6+705段滑坡稳定性分析及其加固处理

以具体滑坡工程为例,详细分析了该滑坡的工程地质条件,对其滑动机制进行了阐述。依据滑坡的整体现状,进行分区评价,得出不同区域的稳定性。同时运用刚体极限平衡方法对滑坡进行了整体稳定性和局部稳定性分析计算,确定了支护设计参数,而后在此基础上采用了锚喷、素喷护面、锚索等工程措施进行了综合处理,取得了较好的效果。     

GFRP抗浮锚杆在基础底板中的锚固性能现场试验研究

通过现场拉拔破坏性试验,测得不同直径的GFRP抗浮锚杆在基础底板内的极限承载力和滑移量,并与实际工程中不同形式的钢筋抗浮锚杆作比较,分析其承载性能和粘结特性。研究表明,在相同的混凝土强度与养护条件下,相同直径的GFRP抗浮锚杆的极限承载力、平均粘结强度与钢筋抗浮锚杆相比较高,且GFRP抗浮锚杆的变形能够满足实际工程需求,充分验证了GFRP材料用作抗浮锚杆的先进性与合理性。基于试验结果与理论分析,给出了GFRP抗浮锚杆与基础底板的最佳锚固面积,并提出了计算公式。     

Design of the Modern Embankment

This paper introduces the features of the modern shore structure-the tied buttressed retaining wall without bottom between buttresses. The design specification, main point of design and calculation procedure for the structure is discussed.