【正文】
when a certain amount of plastic material, the volume weight increases with water consumption firstly, as water consumption exceeds the optimal value, paction density decrease. Compressive strength of cementedrockfill increases with the amount of plastic material and monotonous rise. Compressive strength after 28 days (mix the flyash) decreased slightly. The optimal water consumption is 90kg/m3 when the total plastic material within 6080 kg/m3. C. Field test According to lab test results, the site roller paction trial had been done bined with preparation work of construction. Considering the economy and workability, the field tests done with the two groups of cement dosage trail of 80kg/m3 and 60kg/m3 instead of 100kg/m3 and 40kg/m3. The trail has been done according to the optimal water consumption (90kg/m3).Flyash does not used in the small engineering work because far transport distance. Materials are taken after mixed and eliminate the super size gravel, then made into specimen, and the pressive strength results are very 9 close to laboratory test results. Field tests show that the cementedrockfill has the same characteristics as RCC. Digging pit shows that paction effect from surface to the bottom is greater, but the overall density is less than RCC. According to the results of impermeability test, the cementedrockfill has lower impermeability capability。其他經(jīng)濟、可靠的防滲材料,如瀝青混凝土、土工膜,可以被考慮是提高其競爭力的重要手段。它和面板泥沙堆石壩相比較,項目數(shù)量更少、更安全。取消混合的程序,不僅可以取消攪拌站和其他一些設備,還可以加快施工速度,工程量(體積)是遠小于普通混凝土面板堆石壩,因此施工時間可以大大縮短。在圖 2說明了水泥堆石的攪拌設備??紤]到經(jīng)濟性能和使用性能,現(xiàn)場做了 80公斤 /立方米和 60公斤 /立方米代替 100公斤/立方米和 40公斤 /立方米兩組的水泥用量的蹤跡。所以它的混凝土工作性能差。 ( 7) 松散的聚合(堆)的要求可以簡化準備部分,降低成本,減少制造廢物渣,可以保護植被,縮小采石場的規(guī)模及降低運輸成本。這可以水泥滲入量(相對于混凝土),下料的要求放松。它的機械性能高于堆石的,但低于混凝土的。南玻大壩是對稱的梯形壩,南玻的實力相對于混凝土不強。測試說明改進后的堆石壩具有巨大的變形模量,可以降低大壩變形效率。對水電站混凝土壩工程建設的研究 I. 簡介 施工方法與材料的創(chuàng)新能促進大壩施工技術的改進。這描述了堆石壩的施工,對大壩的恢復和保管修改面板堆石壩的財產(chǎn),可能使壓應變消除。另一方面,在一個對稱的梯形壩中產(chǎn)生的壓力體積小,其要求的材料強度可以很低。 ( 2) 壩料與一些水泥經(jīng)軋制后成為水泥堆石,但未形成粒狀物料。與此同時,裂縫控制、界面治療、局部離散化和一些其他的要求可以放松。 ( 8) 水泥堆石壩施工方法維護正常的堆石壩的施工特點,簡單和快捷。在這個實驗中,消除了超級尺寸的礫石和最大粒徑小于 100毫米的晶粒。根據(jù)蹤跡已做了大量的最優(yōu)耗水量( 90公斤 /立方米)。 圖 2 水泥堆石的攪拌設備 4 B 施工方法 大于 150毫米的 碎石被耙消除了,然后通過自我卸卡車運輸?shù)蕉褕觥? 挖掘 ? 交通運輸 ? 卸下 ? 鋪路 ? 水泥噴 ????水 泥自 填輥壓實 水泥準備 ? 水泥運輸 ? 圖 3 “自填和碾壓”水泥堆石壩壩體施工的工藝流程 Ⅴ 水泥堆石壩的結構形式 可能的新類型的大壩基于該技術提出了如下。 圖 5 泥沙堆石混合壩(圖中的虛線表示的是面板泥沙堆石壩的剖面) 在泥沙堆石混合壩的上游邊坡的范圍通常是從 1: 到 1: ,下游邊坡的接近面板泥沙堆石壩的。在實際應用中,兩個分級碾壓混凝土應作為首選,其施工方便、成本低和有良好的防滲效果。 the permeability coefficient of cementedrockfill is from 102 to 105cm/s, so the watertight upstream facing should be took into consideration as seepage control measure. IV. CONSTRUCTION RESEARCH OF CEMENTEDROCKFILL A. Construction procedure Construction procedure of the cementedrockfill dam is different from the rockfill dam. Proper mixing equipment of cementedrockfill is illustrated in figure 2. Figure 2. Mixing equipment of cementedrockfill B. Construction method The gravel larger than 150mm is to be eliminated by rakes, and then be transported to stockyard by selfunload truck. It is mixed by load truck for the first time after mix into cement flyash, and then blunged to uniformity. The rolling thickness is 17 cm。s rich rock and sand gravel resource, the indoor experiments not only study the cemented rockfill but also the cement