Introduced by prestressed pier in the gate of spillway in xiao xia hydroelectric power station, the text reasonably established 3 - d finite elements mechanic model by the advanced finite elements popular in the world which can expediently impose tension of anchor funicular at its place. it also considered possible diversified combination of loading, and indicated that the effect of its prestressed action is fruitful compared with its conventional counterpart by study of mechanic calculation in comparison. as a result, it vastly improved burdening state of pier. by analysis of 3 - d finite element method, it also gained the stress result indifferent boundary conditions such as breast wall joint support and fixed support, and the displacement result in diversified loading combination. those results gained the instructive and reference value in design of prestressed pier
本文結合黃河小峽水電站泄洪
閘預應力
閘墩這一工程實踐,採用國際上已成熟的有限元方法,合理地建立了預應力
閘墩的三維有限元模型,該模型可方便地按預應力錨索的點位施加錨索預張拉力,考慮了可能發生的多種荷載工況組合,並與無預應力
閘墩結構進行了對比分析研究,指出其預應力效果是明顯的,可以大大改善
閘墩結構的受力狀態,通過三維有限元分析,還得到了胸
墻簡支、固端不同情況下的應力成果和各荷載下的位移成果,這些成果的取得對預應力
閘墩的設計具有一定的指導和參考價值。
Abstract : a brief introduction to scientific research in the three gorges project ( tgp ) and the applications of research achievements is given, which include treatment of newly slited layer on the foundation of the first stage earth - rock cofferdam, dumping bottom technique of river closure in deep water, construction of cut - off walls in the second stage earth - rock cofferdams, 3 - d computer simulation of river closure, concrete casting alternatives and selection of major construction equipment for the second stage construction optimization of durability of raw materials of concrete, deep sliding resistance and stability of the intake dam section, the section of the intake of the power station, the intake penstock of the power station, layout and hydraulics problems of shiplocks, stability of high slopes of shiplocks, and optimization of the system structural anchor bars to reduce the risk of cracking in the concrete wall and 700mw turbine generator units
文摘:介紹三峽工程的科研項目,綜述三峽工程開工以來的主要科研成果及工程應用情況,包括:一期土石圍堰基礎處理與施工技術;大江截流上下游土石圍堰平拋墊底研究;二期圍堰防滲工程研究;大江截流計算機科學管理;大壩混凝土澆築方案及主要施工機械選型;混凝土的原材料和耐久性優化試驗研究;大壩基礎深層抗滑穩定研究;三峽電站進水口型式研究;鋼襯鋼筋混凝土引水管道研究;蝸殼打壓、廠壩間伸縮節問題研究;永久船
閘的引航道布置、輸水系統及水力學、高邊坡穩定、混凝土襯砌
墻的結構與支護研究;特大型水輪發電機組的科學研究。
A brief introduction to scientific research in the three gorges project ( tgp ) and the applications of research achievements is given, which include treatment of newly slited layer on the foundation of the first stage earth - rock cofferdam, dumping bottom technique of river closure in deep water, construction of cut - off walls in the second stage earth - rock cofferdams, 3 - d computer simulation of river closure, concrete casting alternatives and selection of major construction equipment for the second stage construction optimization of durability of raw materials of concrete, deep sliding resistance and stability of the intake dam section, the section of the intake of the power station, the intake penstock of the power station, layout and hydraulics problems of shiplocks, stability of high slopes of shiplocks, and optimization of the system structural anchor bars to reduce the risk of cracking in the concrete wall and 700mw turbine generator units
介紹三峽工程的科研項目,綜述三峽工程開工以來的主要科研成果及工程應用情況,包括:一期土石圍堰基礎處理與施工技術;大江截流上下游土石圍堰平拋墊底研究;二期圍堰防滲工程研究;大江截流計算機科學管理;大壩混凝土澆築方案及主要施工機械選型;混凝土的原材料和耐久性優化試驗研究;大壩基礎深層抗滑穩定研究;三峽電站進水口型式研究;鋼襯鋼筋混凝土引水管道研究;蝸殼打壓、廠壩間伸縮節問題研究;永久船
閘的引航道布置、輸水系統及水力學、高邊坡穩定、混凝土襯砌
墻的結構與支護研究;特大型水輪發電機組的科學研究。
On the process of simulation the deformation after excavation at the middle frusta and the vertical slope at three gorges permanent shiplock, program the fortran procedure to perfect model creation and the capability of the pre - procedure and post - procedure in flac - 3d
在模擬三峽永久船
閘中隔墩和直立邊
墻開挖卸荷變形過程中,編制fortran程序,完善flac - 3d建模功能和增強其前後處理能力。
After excavation, there are concentration phenomenon of stress at the corner or the shiplock room, and the tension zone lies in half of the middle part as well as the part of the two slopes to the lower part of the upright wall. finally the analysis results are compared with site monitoring data in period of construction as well as the feedback reports, the result of all comes to meet with each other very well
開挖完成後,在
閘室拐角處存在不同程度的應力集中現象,中隔墩上部1 2的巖體及南北邊坡至直立
墻頂部平臺以下的部分巖體為拉應力區。在兩側邊坡及邊
墻的塑性區出現在損傷區和部分卸荷影響區內,中隔墩大部分區域的巖體都進入了塑性狀態,
閘室底板處的塑性區基本上與損傷區一致。
And the conclusion can be obtained thatrafter excavation, the horizontal deformation increased continuedly with the depth of excavation. while the whole deformation takes on a tendency of nearly horizon and slightly downward. the middle part of the shiplocks maintains the state of unloading feedback during the excavation, when the excavation is finished, it expands toward two sides
本文研究發現開挖完成後
閘室直立
墻和南北邊坡的巖體水平方向變形隨著開挖深度的下降而不斷增大,開挖完成後的總體變形表現為近水平略向下。中隔墩在開挖過程中,始終處于卸荷回彈,開挖完成後,中隔墩向兩側張開。
The surrounding rock mass of the tgp shiplocks is jointed rock mass cut by well - developed discontinuous joints. the middle frusta and vertical border wall are the important components of the lock room construction. its deformability and stability will directly affect the construction function and using security
永久船
閘區巖體屬於一種斷續節理切割的裂隙巖體,中隔墩和直立邊
墻是
閘室結構的重要組成部分,其變形大小和穩定程度將直接影響三峽航道的結構功能和運行安全。
Shankou spillway project has many specific characteristics, for example, the gate frusta and weir body have equivalent thickness, the weir body is low and have corridor, the foundation of the weir body is " high - low foot " " and the side frusta is also used as retain wall. in view of the characteristics, to better analyze the stress distribution on weir body, gate frusta, the joints between gate chamber and weir body, under the condition that the gate chamber is applied with asymmetrical loads and complicated constraints, three dimensional finite element method is applied in this paper
本文針對山口溢洪道
閘墩與堰體底板厚度相當,堰體為低堰且設有廊道、堰體建基面「高低腳」及邊墩兼作擋土
墻等具體特點,在
閘室設計中采山口水利樞紐工程溢洪道
閘室三維有限元整體應力計算分析用三維有限元整體應力計算方法分析
閘室的受力狀態,分析
閘室在荷載不對稱。
Design and construction of the underground water - gate wall at qixi coalmine in zaozhuang
棗莊市齊西煤礦水
閘墻設計與施工
Finite element analysis on application of sap5 program in wall structure of guigang shiplock
5程序用於貴港船
閘閘墻結構有限元分析
The constraction practice of water brake wall in remining coal flow roadway in quot; bayi quot; coal mine
八一煤礦復采溜煤巷水閘墻施工實踐