A brief introduction is given to the treatment of the zeya dam foundation, principles of seepage control and design of the concrete face rockfill dam of the zeya reservoir. as for the excavation of the sand - gravel zones, except the toe slab and its 1 / 9 bottom width down stream, the alluvial layers are excavated to the micro - weathered rocks, while the other sections remain unexcavated. regarding to the treatment of the fracture zones, concrete filling is used for the toe slabs and semi - permeable materials are used for other section. according to the construction characteristics, a filter is placed in the down stream embankment foot. to improve the integrity of the dam foundation and anti - seepage capability consolidation grouting and curtain grouting are adopted. as a result safety, economic benefit, convenience in construction and good performace are achieved
簡要論述澤雅水庫面板堆石壩壩基處理和防滲的原則及設計要點.趾板基礎和堆石體各區砂
礫石基礎開挖,除趾板與其下游1 / 9底寬范圍以及壩腳挖除沖積層至弱風化(局部微風化)基巖外,其餘部分均予以保留.斷層破碎帶處理,趾板部位採用混凝
土塞,其它部位採用半透水料置換,並根據本工程特點在下游壩腳加設了反濾層.為提高壩基的整體性和防滲性能,對趾板進行了固結和帷幕灌漿.達到了安全、經濟、便於施工的目的,運行情況良好,可為面板堆石壩的設計和研究提供參考與借鑒
( 2 ) the lateral deformation is effectively limited by reinforced earth layers and the settlement becomes small. @ the lateral deformation is enlarged on soft foundations, and the settlement becomes large. @ the reinforced earth layers on soft foundations behaves extension. the response behaviors of high sand - gravel embankment are indicated as the following : ? he amplification factor of earthquake acceleration varies with reinforced earth structure. ( 2 ) the basic frequency of the original embankments in different reinforcement conditions is about 0. 76hz. ? the amplitude of dynamic deformation appears small and the dynamic stability is safe
研究表明:加筋
土體能有效地限制路堤的側向位移發展,減小沉降變形量;軟基路堤的側向位移較大,將顯著地增大路堤的沉降變形;軟基上加筋
土墊層中產生的拉應力最大;加筋砂
礫土路堤在振動荷載作用下動變形反應較小,具有良好地動力穩定性。
The test obsvervation include air temperature, ground temperature, foundation moisture, freeze depth, freeze capicity, freeze residual capicity, groundwater table and shape transform of canal lining, etc. throught systemic observation, analysis of impact about each factor on fundation freeze capicity, evaluate effect on anti freeze of various canal lining, comparison on technology and ecnomic of different method, a kind of main canal lining format is been recommended to engineering practice with siutable to ningxia local feature, fufilling the need of main canal safey i application, economic and practical, that is using polystyrene plate laying under concrete slate and grit taking replace of filling layer and optimizing design
試驗觀測內容包括氣溫、地溫、基
土含水量、凍深、凍脹量、凍脹剩餘量、地下水位和砌體外觀變化等項目。通過系統的觀測,分析各因素對基
土凍脹量的影響,評價各種襯砌型式的防凍西安理工大學工程碩士專業學位論文脹效果,並進行技術和經濟綜合分析比較,推薦出了適合我區特點、滿足乾渠安全運行、經濟實用、防凍脹效果好的乾渠防滲襯砌型式,即混凝
土板下鋪設聚苯乙烯板和砂
礫石換填層結構型式,加以優化設計,用於工程實踐。
Gully erosion, which is universal on original lands, but also the special forms, for example, hole erosion gravel erosion debris slide and debris flow, which is unusual in loess area, ( 2 ) based on a long - term fixed point experiments in proving ground of the south stackpile, the soil erosion factors have been researched quantitatively, the runoff and erosion affected factors have been made sure and the experiential models of producing water and soil have been taken in newly - constructed stage, early stage and later stage of reclamation
確定南排
土場原地貌的水蝕模數為3700 4400t km ~ 2 ? a ;在排
土場新造地貌上,擊濺、面蝕、細溝侵蝕、淺溝侵蝕、沉陷侵蝕、砂
礫化面蝕、
土砂瀉溜和坡面泥石流等水
土流失形式出現頻率和發生程度都明顯強于原地貌。 ( 2 )以南排
土場徑流試驗場長期的定位觀測為基礎,對排
土場未復墾時期、復墾初期、復墾後期的
土壤水蝕影響因子進行定量研究,確定了徑流和
土壤水蝕的主要影響因子及其臨界值,建立了產流產沙的經驗模型。
The dam of mania hydroelectric project is a soil - rock dam with spreading gradation soil of core wall. the height of the dam apices is 4261. 3m and the maximal height is 76
滿拉水利樞紐工程攔河壩為寬級配
礫質
土心墻
土石壩,壩頂高程4261 . 3m ,最大壩高76 . 3m 。
Gravelly - sand over an iron - pan and gravel layer
沙
礫覆于鐵質
土層與砂
礫層之上。
Abstract : according to the composition, the thermal - water sedimentary rocks of yinmin formation in the dongchuang copper ore field can be divided into nine types, of which skarnoid, cupric magnetite carbonate, paracontemporaneous breccia formed in thermal water processing are confirmed and named in this study
文摘:東川銅礦田因民組熱水沉積巖根據主要成分可分為9大類,其中類夕卡巖、含銅磁鐵碳酸鹽巖、熱水膠結準同生角
礫巖為本次研究確定和命名,其礦物組合、微量元素、稀
土元素等地球化學特徵表明:它們是海底火山噴流沉積作用的產物。
Based on the lab orthogonal tests, using self - manufactured constant head permeameter, the effect of gravel content, void ratio and particle shape on the coefficient of permeability of soil - rock - mixture was studied
本文採用室內正交實驗,利用自製的常水頭滲透儀,研究了
礫石含量、孔隙比和顆粒形狀3個因素在不同水平下對
土石混合體滲透系數的影響。
The components to be considered in this book include boulders, gravel, sand, silt and clay.
本書所考慮的組成部分包括漂
礫,
礫石,砂,粉
土和粘
土。
Effect analysis of salinized - soil soft foundation with compacted sand - pile
擠密砂
礫樁處理鹽漬
土軟弱地基效果分析
It can be used for water supply and drain in factories, mines, cities and power stations, agricultural water drain and irrigation as well as water engineering
如精礦尾礦灰渣煤渣水泥泥
土礦
礫等強硬度強腐蝕高濃度渣漿。被輸送的固.
It ' s also a better kind of permeation proof materials
寬級配
礫質
土是一種良好的防滲材料。
3m. as for lack of construction experience in using spreading gradation soil as the permeation proof body in our country at present, the author has studied the soil material carefully
針對目前國內尚沒有寬級配
礫質
土作為高
土石壩防滲體的實際施工經驗,對
土料進行了較為詳細的試驗研究工作。
The spreading gradation gravelly soil is a kind of clayey coarse - grained soil. it ' s also a soil - rock mixtures. it ' s often divided into fine material and coarse material by the save of 5mm and the granutometric composition affects its project characteristics directly
寬級配
礫質
土是一種粘性粗粒
土,是天然
土石的混合料,它通常以5mm為界被分為粗料和細料兩部分,顆粒組成是決定寬級配
礫質工工程特性的主要因素。
In this paper, on the basis of the numerical analysis with the concept of equivalent soil mass with reinforcement and shake table model test, the calculation of high loess embankment with geogrid - reinforcement in highway is carried out under static loading, and the dynamic response of high reinforced sand - gravel embankment with grogrid - reinforcement in highway is tested under earthquake. the behaviors of loess embankment are indicated as the following : ? he stress and deformation varies with reinforcement design conditions and foundation types
本文通過將
土工合成材料與
土體視為加筋等效
土體的數值計算方法和振動臺模型試驗,以加筋黃
土高路堤和豎直擋板加筋砂
礫土高路堤為研究對象,計算分析了不同堤基上不同加筋設計條件下黃
土高路堤的靜應力及變形變化規律,試驗研究了不同加筋條件下砂
礫土高路堤的動力反應特性。
Study on membrane penetration in sandy soil specimens based on digital image measurement system
基於數字圖像測量系統的砂礫土試樣膜嵌入問題研究