To avoid manual labor of chiseling - grossness, in the area of second - stage concrete construction, permanently non - removed metal molding boards nets are used as molding boards of first - stage concrete. substitution joints of reinforcing steel bars for traditional electric welding and usage of equipments for joints of reinforcing steel bars efficiently improve strength of junctions and rate of connecting reinforcing steel bars, and safety of construction and stability of quality, and greatly reduce cost. it ' s possible that three gorges project become top - ranking project in the world by study on systems engineering of high - strength concrete construction
混凝土縫面處理採用高壓水流沖毛技術,大大提高了施工工效,減少了倉面污染;模板工程大量採用定型鋼模板施工技術,提高了
壩體混凝土成型質量和工程進度;在二期混凝土施工區域,為免除人工鑿毛勞動強度,採用永久性免拆金屬模板網作為一期混凝土模板;鋼筋連接改進傳統的電焊連接方式,採用大量採用鋼筋接
頭機械連接技術,有效提高了接
頭強度和鋼筋連接速度,施工安全性大大加強,質量穩定性有效提高,經濟成本大大降低;三峽二期工程持續高強度混凝土施工系統工程的研究,使三峽工程成為名符其實的「世界一流工程」成為可能;三峽二期工程混凝土溫控綜合技術的應用,有效降低了
壩體混凝土溫度的產生;混凝土表面處理及裂縫處理技術的應用,提高了建築物的整體性和耐久性。
Surveying setting - out of distorted face for right dam abutment in yushi reservoir
玉石水庫右
壩頭扭曲面開挖的測量放樣
With the further economic growth and the implement of development of the western regions, hydroelectric construction in our country is undergoing rapid growth, anumber of high - dam power - station is in building or in programming. in view of its higher - head and larger magnitude of spill structure outlet, it is difficult for conventional concrete or reinforced concrete structure of pier and pier room to support its vast water pressure. coupled with the improvement of prestressed method, it has been the noteworthy tool in solving the problem
隨著我國經濟的加速發展及西部大開發戰略的實施,我國水電事業也迎來了迅猛發展的大好時機,一批高
壩水電站正在建設或規劃之中,其泄水建築物孔口及水
頭愈來愈大,常規混凝土或鋼筋混凝土閘室閘墩結構難以承受如此之大的水推力作用,隨著預應力技術的成熟,這一技術已成為解決該問題的關鍵技術措施之一。
And from the end of the reservoir, a 3 - mile long aqueduct would gravitate water to the shenzhen reservoir. from the reservoir, water further gravitates to hong kong. the dongshen water supply scheme started at the qiutou (
東深工程運河起自廣東省東莞市橋
頭縣,流經司馬、旗嶺、馬灘、塘廈、竹塘、沙嶺、上埔、雁田及深圳等地,全長83公里,主要建設包括6座攔河閘
壩和八級抽水站。
Finally, niutoushan double - curvature arch dam was modeled and 3 - d fem simulation analysis was performed, so as to find out the integral safety factor and the stress and displacement patterns of dam and its foundation under different load combination
最後,對牛
頭山水電站雙曲拱
壩進行了有限元建模和三維非線性有限元模擬分析,計算分析了各種情況下
壩體和基巖的應力位移規律,對大
壩的整體安全度進行了綜合評判。
In order to understand the characteristics and mechanism of flow washout for the crevice of core wall in earth - rock dam, according to the exemple of crack washout test for the core of heihe dam, constant water level washout test and changing water level washout test are adopted differently, the process of test and the character of the flow washout for the core crack are gone into particulars
摘要為了解水流沖刷作用下反濾層對土石
壩心墻裂縫發展保護作用的特點和機理,以黑河土石
壩心墻裂縫沖刷試驗為例,分別採用常水
頭和變水
頭兩種方法,探討了土石
壩心墻裂縫在水流沖刷過程中的特點。
Research and discussion of management experience in dongbatou critical site project in the yellow river
黃河東
壩頭險工工程管理經驗探討
Such as : the xinfengjiang massive - head dam. earthquake could be felt at reservoir region after it was stored water in 1959. and, it appeared some rifts on its head during a strong earthquake in 1962
比如:新豐江大
頭壩在1959年水庫蓄水后不久,庫區發生有感地震, 1962年3月19日發生m = 6 . 1級強震時造成大
壩頭部裂縫。
The dissertation focus on the main conflict of flow and sediment change, by analyzing the flow and sediment features, and change in rivercourse of typical period in histry, collecting the data of riverbed change. according to the flow and sediment change condition, combining the existed water works, and based on the results of former researches, the study are conducted on the law of flow state change by comparing rivercourse conditions before and after the completion of sanmenxia project, which may provide some idea for flow state change when xiaolangdi project completed and put into operation and some basic clue for the prediction of variation trend of river section from tiexie to shendi, from shendi to tieqiao near zhengzhou, from tieqiao near zhengzhou to dongbatou, from dongbatou to gaocun and so on in the year 2010 and the period 2010 to 2020. the result may provide some reference for flood control of these wangdering river sections, and some guidelines for planning of water projects and arrangement of project sequence
本課題緊緊抓住小浪底水庫運用后水沙變化這一主要矛盾,通過分析研究以往典型時期的水沙特點和河道演變特點,收集分析河床邊界條件變化資料,小浪底水庫運用后水沙資料變化,結合現有河道整治工程建設情況,總結前人的研究成果,重點研究三門峽水庫運用後下遊河道河勢變化的規律和特點,探索小浪底水庫運用後下遊河勢變化情況,分析預測游蕩性河道鐵謝至神堤、神堤至鄭州鐵橋、鄭州鐵橋至東
壩頭、東
壩頭至高村等各個河段在2010年, 2010年至2020年期間的河勢變化趨勢,為分析游蕩性河段的防洪形勢,指導河道整治工程建設的規劃和工程安排提供決策參考和依據。
Depth detection and analysis on the scour pit around the south spur dyke head of changxin island
長興島南沿丁
壩壩頭沖刷坑深度探析
A study on the structural deformation of a special dam body with a comprehensive analysis method is presented, by taking section 33 of the qingtongxia dam as an example. the dam block is located at the abutment on the right bank, like an “ earth - retaining wall ”, whose cross section is “ high - heeled shoe ” sheped. because of the special structure and load condition, its deformation toward the downstream is large. deep research of its deformation law is conducted, and analysis of the special structure, the boundary condition of this dam block is performed, and the physical genesis of the large deformation of the dam block is revealed
以青銅峽大
壩33
壩段為例,提出應用綜合分析法研究特殊
壩體結構的變形規律.該
壩段位於右岸
壩頭,類似一「擋土墻」 ,斷面形狀如「高跟鞋」 .由於結構及受力條件特殊,產生了向下游的較大變形.本文應用綜合分析法(多種模型分析、結構計算等)對其變形規律進行了全面的分析研究,並重點對該
壩段的特殊結構和邊界條件進行深入分析研究,弄清了該
壩段向下游有較大變形的物理成因
Silt will deposit there. velocities around groin head are larger than the scour velocity and scour hole may develop in this area. this would affect the stability of spur dikes
受丁
壩阻擋,
壩田所在的邊灘區域流速很小,泥沙在此淤積:而
壩頭附近流速較大,通常在此區域形成沖刷,影響丁
壩的穩定性。
Based on the local scouring test of the dike ' s head under the action of clear tidal currents, of both tidal currents and waves, and of both muddy tidal currents and waves, variations of the scoured pit ' s depth at each dike ' s head with time, and the scoured pit ' s depths with three experimental conditions are compared
進行了清水潮流和潮流波浪、渾水潮流波浪作用下的4條丁
壩壩頭沖刷試驗,給出了各丁
壩壩頭沖刷坑深度隨時間的變化,對比了3種試驗條件下丁
壩壩頭沖刷坑的深度。
This proof following enterprise already through the authentication, and has set up a file in the dongguan 114 nets industry and commerce enterprise database, inquires the more detailed enterprise material, please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ), this enterprise numbers for 2544
茲證明東莞市萬江區
壩頭新城針織制衣廠已通過認證,並已在東莞114網工商企業數據庫中備案,查詢更詳細的企業資料,請撥東莞企業查詢臺96060 (人工) 9686810114 (自動) ,該企業編號為2544 。
This proof following enterprise already through the authentication, and has set up a file in the dongguan 114 nets industry and commerce enterprise database, inquires the more detailed enterprise material, please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ), this enterprise numbers for 12443
茲證明東莞萬江
壩頭嘉浦機械製造廠已通過認證,並已在東莞114網工商企業數據庫中備案,查詢更詳細的企業資料,請撥東莞企業查詢臺96060 (人工) 9686810114 (自動) ,該企業編號為12443 。
This proof following enterprise already through the authentication, and has set up a file in the dongguan 114 nets industry and commerce enterprise database, inquires the more detailed enterprise material, please dial the dongguan enterprise information desk 96060 ( artificially ) 9686810114 billion ( to be automatic ), this enterprise numbers for 19418
茲證明東莞市萬江區壩頭村順達加油站已通過認證,並已在東莞114網工商企業數據庫中備案,查詢更詳細的企業資料,請撥東莞企業查詢臺96060 (人工) 9686810114 (自動) ,該企業編號為19418 。