rcc dam 中文意思是什麼
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In the dam foundation restraint area, mgo can be mixed into concrete to prevent dam longitudinal crack. research on autogenous volume change of rcc mixed with mgo, and research on thermal stress compensation of darn foundation prove that rcc mixed with mgo plays a role in dam crack control
在材料措施方面，深入研究高碾壓混凝土壩基礎約束區採用外摻mgo措施，利用其微膨脹性能補償壩體降溫過程中產生的溫度應力，以防止大壩縱向裂縫的發生。 -
This paper establishes a model simulating dam actual placing process and considering the non - continuity of initial temperature on the boundary of new and old concrete, daily air temperature change, concrete - placing temperature, hydration heat, heat insulation on boundary, water - storing process, placing intermission and curing with water. the calculation of stress field considers the concrete weight, static water pressure, thermal stress, different autogenous volume change between rcc and normal concrete, change of elastic modulus of concrete with age and creep action
考慮了乞今最為全面的初始條件和邊界條件，包括模擬壩體的實際升程過程，考慮了新老混凝土接觸面上的初始溫度不連續，逐日的氣溫變化，混凝土的入倉溫度，水化熱溫升，邊界保溫，水庫蓄水過程，澆築間歇以及灑水養生等因素；應力場的計算考慮了混凝土的自重，靜水壓力，溫度應力，常態混凝土與碾壓混凝土不同的自生體積變形，混凝土的彈性模量隨齡期的變化以及徐變的作用。 -
In charge of one of major subjects of the national eighth five - year plan, i. e. " study on shotcreting techniques of polyacrylate emulsion cement mortar for impermeability coating of pu ding rcc dam ", the achievement of which has been appraised by the ministry of electric power and evaluated as reaching national leading level. 2. in charge of the major subject aided by the committee of national natural science funds, " study on durability of high bolumes of fly ash concrete ", the first phase achievement of which has been commended by the committee. 3. in charge of one of major subjects of the national ninth five - year plan, i. e. " study on high performance concrete in marine engineering, design and construction ". 4. acting as one of editors - in - chief of " technical specification for abrasion and cavities resistance of concrete in hydraulic structures ", which is issued by the ministry of water resources. 5. by providing the repairing and strengthening schemes on seepage and cracks of the basement of nanjing lukou international airport, the air traffic opening of the airport was ensured as scheduled. 6. consulting services on techniques of high performance and abrasion - erosion resistance concrete for three - gorges project, anti - corrosion of reinforced concrete strutures for the ore port of shanghai baoshan iron and steel works, mass fly ash concrete for jiangyin yangtze river bridge and pumping concrete for nanjing yangtze river second bridge
主持國家「八五」攻關項目「普定碾壓混凝土壩上游面丙乳砂漿防滲層大面積施工工藝研究」 ，成果通過部級鑒定，評價屬國內領先水平； 2 .主持國家自然科學基金重大項目「高摻量粉煤灰混凝土的長期性能研究「 ，階段成果獲國家自然科學基金委通報表彰與獎勵； 3 .主持國家「九五」攻關項目「海工高性能混凝土成套技術研究」 ； 4 .水利部「水工混凝土抗沖磨防空蝕技術規范」的主編之一； 5 .為南京祿口國際機場地下室修漏與裂縫補提出技術方案被采納並實施，為機場如期通航作出貢獻； 6 .為三峽工程抗沖磨高性能混凝土技術、上海寶鋼礦石碼頭鋼筋混凝土防腐蝕技術、江陰長江大橋大體積粉煤灰混凝土技術、南京長江二橋泵送混凝土技術等提供咨詢建議。 -
According to observations of some existing rcc dams at home and abroad, the rcc dam construction technologies are successful in general, but the problems of seepage still exist
根據對國內外已建碾壓混凝土壩的運行觀測，總體來說碾壓混凝土築壩技術是成功的，但普遍都存在著滲漏問題。 -
( 4 ) the seepage prevention structures and drainage structure is very important for the safety and stabilization of rcc dams, so their effects is discussed in this paper to the seepage field ' s characteristics of rcc dams, moreover, the seepage control schemes of rcc dam is analyzed
（ 4 ）碾壓混凝土壩的防滲與排水結構對于大壩的安全與穩定極為重要，本文研究了各種防滲與排水技術對大壩滲流場特性的影響作用，並分析了各種防滲與排水方案的特點。 -
In harsh climate region, the air temperature changes greatly between winter and summer. rcc dam are usually placed without bulk and longitudinal joints, and left free in winter. thus, it ' s unique thermal stress time - space distribution rule increases the difficulty of temperature control and crack control of rcc dam
由於嚴寒地區冬季氣候寒冷、年內氣溫變化幅度大；碾壓混凝土壩採取通倉澆築、不分縱縫以及越冬長間歇式的施工方法，使其具有獨特的溫度應力時空分佈規律，更增加了碾壓混凝土壩溫控與防裂難度。 -
By the research on the raw materials, the mix proportion, the concrete temperature control in outlet, in transport and in placement, the cure and the post - cooling water, the synthetic measures for rcc dam construction in high temperature and the enforcement methods on basis of the computation and experience of jinghong hydropower station are presented in this paper
本文通過對原材料及配合比、混凝土出機口溫度控制、運輸過程溫度控制、澆築過程的溫度控制以及混凝土澆筑後的養護和冷卻通水等一系列研究，提出景洪電站高氣溫條件下大壩碾壓混凝土連續施工的綜合措施，並在計算和已有經驗的基礎上給出具體實施方法。 -
According to the observation data of rcc dam temperature, the thermal parameters were back calculated, and the results could meet the requirements of the project
反演結果滿足工程需要。採用帶動量因子的自適應學習率bp演算法訓練網路，收斂性好。 -
In the present paper, the author has particular researched into the saturated - unsaturated seepage theories and numerical methods of the roller compacted concrete ( rcc ) dam based on the previous achievements in the field
本文在總結他人研究成果的基礎上，針對碾壓混凝土壩的主要滲流問題，開展對碾壓混凝土飽和-非飽和滲流理論和演算法方面較詳細的研究工作。 -
The following contents are included : ( 1 ) based on the fundamental seepage theory, the basic differential equation of saturated - unsaturated seepage in porous mediums has been deduced, in which the pressure head is the fundamental unknown quantity. furthermore, the equation for rcc dam is deduced too
主要內容包括： （ 1 ）從滲流基本理論出發，以壓力水頭為基本未知量推導多孔介質三維飽和非飽和滲流微分方程，並根據碾壓混凝土壩的特點得出適合其自身的滲流控制方程：進而對碾壓混凝土的滲流基本理論、滲流特性開展深入的研究工作。 -
The measure gives a new way to treat the cracks on the surface of exposed - in - winter placing layer of rcc dam in harsh climate region
該項措施為解決嚴寒地區碾壓混凝土高壩越冬水平層面開裂問題提供了一條新途徑。 -
Impervious element temperature field simulating analysis using three - dimensional finite element relocating mesh method for rcc dam
重力壩防滲體溫度場的三維有限元浮動網格法模擬分析 -
In harsh climate region, mere exists obvious local stress concentration near the upstream and downstream of the exposed - in - winter horizontal surface of the rcc dam, and the surface of spillway bucket though heat insulation is applied on the surfaces, tensile stress still exceeds the allowable one of concrete. this paper puts forward to adopt preset crack to avoid occurring more cracks. the special crack model is applied to simulate the dam preset crack, and the joint model of fracture mechanics is induced into strain - soften model
在結構措施方面，針對嚴寒地區高碾壓混凝土重力壩壩體越冬層面的上、下游面附近及溢流壩堰面反弧段表面有明顯的局部應力集中象現，在已採取一定的表面保溫防護的條件下，拉應力仍然超過混凝土容許拉應力，開裂難以避免，進而提出設置碾壓混凝土壩表面預留縫結構措施並對該措施進行深入研究，包括預留縫的擴展穩定和壩體沿預留縫的穩定性，以避免大壩在無措施部位開裂，解決大壩越冬層面水平施工縫的開裂問題。 -
Jinghong hydropower station rcc dam is in the subtropics zone, the high temperature continues very long and the temperature control in dam construction is very difficult
摘要景洪電站地處亞熱帶，高氣溫時間長，大壩碾壓混凝土施工溫控難度高。 -
About thermal stress and temperature control of rcc dam in harsh climate region, this paper emphasizes mainly on the following aspects : 1. research on space - time distribution rules of the temperature and thermal creep stress of rcc gravity dam in harsh climate region ; analyzing the reason of formation and influencing factors of the horizontal cracks at the dam upstream and downstream face
圍繞嚴寒地區碾壓混凝土壩的溫度應力和溫控防裂，本文主要進行了以下幾方面研究： （ 1 ）結合兩座碾壓混凝土壩工程實例，研究了嚴寒地區碾壓混凝土重力壩溫度及溫度徐變應力時空分佈規律，分析了大壩上下游面水平裂縫的成因、影響裂縫的主要因素。 -
The reinforced concrete face - slab is adopted as impervious body by long tan rcc dam
龍灘碾壓混凝土重力壩採用鋼筋混凝土面板作為防滲體。 -
2. based on artificial neural network, thermal parameter feedback analysis model of rcc dam during construction period has been established
（ 2 ）基於人工神經網路的方法，建立了碾壓混凝土壩施工期熱學參數反饋分析模型。 -
The thermal stress of rcc dam is different from concrete dam " s, and in order to get correct results, these different characteristics must be considered
碾壓混凝土壩的溫度應力有它不同於常規混凝土壩的特點，必須考慮這些特點，才能得到正確的結論。 -
( 5 ) the author researches the seepage characteristics of longtan rcc dam by finite element method ( fem ), and concludes the best suitable seepage control scheme of the dam after analysis in so many cases
（ 5 ）在對龍灘高碾壓混凝土重力壩滲流特性進行分析時，就有關主要滲流影響因素進行眾多計算工況的比較分析研究，得出大壩的最終優選滲控方案。 -
It is feasible that neural network is applied to the feedback analysis of rcc thermal parameters during construction period. 3. research on the crack control measures of rcc dam in the view of structure
採用神經網路進行碾壓混凝土壩施工期熱學參數反饋分析是可行的，為碾壓混凝土壩施工期熱學參數的反饋分析找到了一條新途徑。
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