扩孔

• For the first application of water jet technology in multi - ring hole reaming and on the basis of the laboratory simulation test deep discussion was made and specific technical parameters were determined . the engineering practice has proved its feasibility
  首次将水射流技术应用到多环扩孔施工中，在实验室模拟试验的基础上对其进行了深入的探讨，并确定了具体的设计参数，工程实践证明该方法是可行的。
• With technical advantage of xinrong machinery and in accordance with the market demand of pipes production , we have designed , developed and manufactured xrlk1125 , xrlk2050 auto pipe - expanding machines with reference to the technology of sophisticated equipment from domestic and overseas
  Xrlk2050全自动扩孔机是我公司根据国内管材生产中市场需求，根据本公司的技术优势，借鉴国外先进设备而开发设计制造的产品。
• The addition of surfactant to etchant can protect surface from intense dissolution , and keep a relative similarity of dissolving activity between surface and tunnel walls . in order to gain a satisfactory enlargement of tunnels , the etchant temperature should be controlled at 70 - 90
  3a / cm ，严重，使比容降低;溶液中添加表面活性剂可以有效地抑制表面溶解，提高比容;适宜的扩孔条件为:温度80oc ; h +浓度lmol / l0
• Equipped with expanding mold of relative specifications , xrlk1125 , xrlk2050 auto pipe - expanding machines and relative pipes production line can realize full procedure automatic production of straight opening and protruding opening pipe - expanding of all plastic pipes from 75 - 630
  Xrlk2050全自动扩孔机与相应的管材生产线、并配以响应的各规格扩孔模具，可完成75 - 630各规格内的塑料管材直口、凸口扩孔的全过程自动化生产。
• Beginning with the analysis of the effects , which are brought by the application of only one kind of pore - former and some other operating factors ( such as sintering temperature , warmth retaining time and so on ) , on the properties of the beads , e . g . , porosity , strength , size distribution of the beads and pores size , etc . , these effects are discussed in detail and the relationship between the factors is studied thoroughly . the use of mpf ( multi - pore - former ) is introduced for the first time , which is of the most importance and significance in this paper
  研究从造孔剂选用和烧结过程对颗粒的孔隙率、机械强度、孔径分布及粒度分布的影响入手，找出了造孔剂的种类及含量、烧结温度以及保温时间等因素对最终所得产品颗粒的性能影响及它们之间的相互关系，并首次提出将造孔剂复配使用来对填充法加以改进，无需扩孔处理，即能直接制备宏孔径、高强度、小粒度、比表面大的多孔玻璃载体颗粒。
• According to the theory , the method of using half - rigid pile reinforce the embankment below the corbel of the approach slab which form a composite foundation and realize rigidity gradation , is put forward in this paper and the formula to calculate pile - soil stress ratio in light of visic curvity expansive theory is also deduced here which can be used in design
  应用这一理论，本文提出了采用半刚性挤密桩复合地基加固桥头搭板枕梁下路堤实现，路、桥的刚柔过渡方法。针对低强度半刚性挤密桩计算理论的现状，本文应用魏西克( visic )扩孔理论推导了计算桩土应力比的理论公式，可供设计阶段采用。
• We have got porous alumina in the aqueous solution of oxalic acid with appropriate concentration through two - step anodic oxidation . the resultant porous alumina membranes have relatively ordered hexagonal pore arrays , which consist of separated nanopores perpendicular to the film surface , parallel to each other and with uniform pore diameter . the pore diameter can be controlled by varieties of immersion time in acid
  实验表明，在适当浓度的草酸中，铝电化学氧化形成多孔氧化铝，其表面形貌研究表明，多孔氧化铝膜中孔径均匀，垂直于表面且彼此分立而平行的纳米级微孔，通过扩孔处理可以方便控制孔径大小。