Cggc established three top one in china in 1987 during the construction of gezhouba hpp , i . e . annual installed sets , capacity and progress of the turbo - generator units 1987年,葛洲壩集團在葛洲壩工程建設(shè)中創(chuàng)造了當(dāng)時年裝機臺數(shù)、容量和進度"三個全國第一" 。
By compounding jd with hpp , the " overlapping effect " of two kind superplasticizers was fully manifested . the compatibility of jd with cement and keeping slump value were more improved through this compounding way . meantime , the bleeding and segregation of hpp were overcome too Jd和hpp復(fù)合使用,可充分發(fā)揮高效減水劑的“疊加效應(yīng)” ,進一步提高jd與水泥的適應(yīng)性,坍落度保持性能,也克服了氨基磺酸鹽高效減水劑泌水離析等缺陷。
The synthesizing process can be finished in a single kettle . not only technology is very simple , but also the reaction time is shortened , therefore , the production efficiency is obviously increased . the general performances of modified melamine resin superplasticizer jd can be furthermore improved by compounding amino - arylsulphonate phenol formaldehyde condensate superplasticizer hpp 使用廉價的活性單體尿素取代三聚氰胺單體以降低高效減水劑的生產(chǎn)成本,并將取代量提高到了目前最高水平17 ;合成在一個反應(yīng)釜中完成,工藝簡單,反應(yīng)時間縮短,提高了生產(chǎn)效率;本文通過物理改性的手段,即復(fù)配氨基磺酸鹽高效減水劑hpp ,可進一步改善改性密胺樹脂高效減水劑的綜合性能。
After the investigation and study of this extruded concrete curb solution overseas , shaanxi provincial bureau of water & electric engineering ( group ) co . , ltd . ( spb ) devoted to the research of this new construction method , invented bjy - 40 extrusion curb placing machine , made comprehensive experiments on heihe dam site , and got valuable results , adopted this method in gongboxia hpp main dam construction 在對國外邊墻施工法進行細(xì)致調(diào)研后,從2001年開始,陜工局率先對這一技術(shù)進行研究,研制了bjy - 40型邊墻擠壓機,在黑河工地進行了現(xiàn)場擠壓混凝土邊墻和墊層料鋪填碾壓的綜合試驗,取得了具有參考價值的第一手資料,并在公伯峽水電站面板壩工程中創(chuàng)新采用了這一技術(shù)。
Based on the productive experiment on heihe dam site , during april to august 2002 , site experiment was made on gongboxia hpp dam site , bjy - 40 extrusion curb placing machine was determined to be applied into gongboxia project , the batch ratio is : cement 80kg / m3 , sand 651kg / m3 , small stone 1449kg / m3 , and sand ratio 31 % , w / c ratio 1 . 31 , admixture 3 % 在生產(chǎn)性試驗的基礎(chǔ)上, 2002年4 8月,在公伯峽面板壩現(xiàn)場進行了擠壓邊墻施工各個環(huán)節(jié)的試驗,通過試驗,確定公伯峽面板壩使用陜工局西安理工大學(xué)工程項士學(xué)位論文水利機械廠研制的bjy 40型混凝土邊墻擠壓機進行固坡施工,其混凝土配合比為:水泥80kgb ’ ,砂651kgb3 ,小石1449kgb ’ ,砂率31 ,水灰比1
Vicinity of hawker permitted places , namely tung choi street hpp , fa yuen street hpp , yin chong street hpp , canton road hpp , nelson street hpp , fife street hpp , ki lung street hpp , nam tau street hpp and cheung wong road hpp 各小販認(rèn)可營業(yè)地點,即通菜街小販認(rèn)可營業(yè)地點花園街小販認(rèn)可營業(yè)地點煙廠街小販認(rèn)可營業(yè)地點廣東道小販認(rèn)可營業(yè)地點奶路臣街小販認(rèn)可營業(yè)地點快富街小販認(rèn)可營業(yè)地點基隆街小販認(rèn)可營業(yè)地點南頭街小販認(rèn)可營業(yè)地點和長旺道小販認(rèn)可營業(yè)地點附近一帶
By adopting the three - dimensional nonlinear finite element program , using drucker e - b model , demonstrating the actual construction progress and water impounding of gongboxia hpp main dam , comparing the two schemes of the existence and nonexistence of extruded concrete curb , made three - dimension simulation calculation , the result proved that while the existence of extruded concrete curb between face slab and rockfill , the deformation and stress of face slab are better than that while the nonexistence of extruded concrete curb 采用三維非線性有限元計算程序,使用鄧肯e b模型,模擬公伯峽面板壩的實際施工進度、蓄水過程,對比有無擠壓邊墻兩種方案,進行三維仿真計算。結(jié)果表明,面板與堆石體之間有擠壓邊墻時,其面板的變形及應(yīng)力值均小于無擠壓邊墻的相應(yīng)結(jié)果。