| 1. | Technical specification for pvc - u inner spiral rib pipe for buildings drainage
建筑排水用硬聚氯乙烯内螺旋管管道工程技术规程 |
| 2. | Abstract : this paper analyzes theoretically the effect of the reversed cone angle and length of the plug on restraint and elimination to the distortion of the internal spiral ribs , and put forth the design methods of the plug in drawing rifled tube
文摘:从理论上分析了芯棒倒锥角和芯棒长度对内螺旋凸筋形状畸变的抑制和消除作用，提出了采用倒锥形等螺距芯棒拉拔内螺纹管时芯棒几何参数的设计方法。 |
| 3. | The technical specification should be made to pre - pare for pre - stressed reinforced concrete hollow slab design , according to 《 code for design of concrete structures 》 and 《 technical specification of pre - stressed concrete structures with middle strength spiral ribs steel wires 》
根据《混凝土结构设计规范》及《中强螺旋肋钢丝预应力混凝土结构技术规程》 ，编制以中强螺旋肋钢丝为预应力受力筋的空心板的技术条件，为预应力空心板的设计奠定基础。 |
| 4. | Pk prestressed composite slab is a new composite floor structure by improving the traditional prestressed composite slab , its precast slab is a prestressed ribbed panel of which prestressed steel is a spiral ribbed high - strength wire , which make the precast component a higher stiffness and buckling capacity
本文研究的pk预应力叠合楼板是通过不断改进传统预应力叠合板后研制的一种新型叠合楼板结构,其预制构件为带肋薄板,预应力筋采用螺旋肋消除应力高强钢丝。 |
| 5. | Middle strength ( 1370mpa ) spiral ribs steel wires is a new type of high strength and good ductility and anchoring strength rolled steel , which is the ideal steel for the high effective pre - stressed reinforced concrete hollow slab . the slab with it has lower price than the traditional ones as well better mechanical property
中强( dw1370 )螺旋肋钢丝是一种强度高、延性好、锚固性能优良的新型材料，是高效预应力空心板的理想的受力钢筋，以这种钢筋为配筋的预应力空心板不仅具有较好的力学性能，满足现代建筑市场对预应力空心板的要求，而且其价格比低于传统的冷加工钢筋。 |
| 6. | The strength ductility and crack property of the high effective pre - stressed rein - forced concrete hollow slab with the medium strength spiral - continuous - ribs steel bar can meet the need of the current codes and specification by calculating the normal limit state and ultimate limit state of the pre - stressed reinforced concrete slab with middle strength spiral ribs steel wires
通过对以中强螺旋肋钢丝为受力筋的预应力空心板的承载力极限状态及正常使用极限状态的计算，证明以中强螺旋肋钢丝为受力筋的预应力空心板，其强度、延性及裂缝性能均符合现行规范规程的要求。 |
