At the beginning of 21st century, with the rapid and steady development of China economy, a lot of large scale hydropower projects with large dams from 200 m to 300 m high are being or to be built. China dam construct...At the beginning of 21st century, with the rapid and steady development of China economy, a lot of large scale hydropower projects with large dams from 200 m to 300 m high are being or to be built. China dam constructions are reaching the level of 300 m high arch dam, 250 high CFRD (concrete face rockfill dam) and 200 m high RCC (roller compacted concrete) gravity dam. Due to the safety and the economy, the type selection for high dams has become the key issue during the argumentation for the hydropower projects, and further efforts are still needed in this aspect for high dams. After reviewing the high dam constructions in China and abroad, authors proposed some advices for the selection of dam types, and hope that it can provide some helpful information for the researches and the design of high dams.展开更多
Selecting right equipment has been playing an important role in the success of construction projects. This paper presents a computer model, ESCMODEL, for equipment selection in Earth-fill dam projects. The proposed mo...Selecting right equipment has been playing an important role in the success of construction projects. This paper presents a computer model, ESCMODEL, for equipment selection in Earth-fill dam projects. The proposed model is capable of assisting the users in making decisions to determine the size, number, type and schedule of presence of dozers, loaders, graders, excavators, trucks, sheepsfoot rollers and smooth wheel rollers. ESCMODEL can contribute to resolve this selection process through the application of an optimization technique, based on nonlinear programming. Three actual case studies of earth-fill dam projects are presented in order to illustrate the effectiveness and performance of the model.展开更多
文摘At the beginning of 21st century, with the rapid and steady development of China economy, a lot of large scale hydropower projects with large dams from 200 m to 300 m high are being or to be built. China dam constructions are reaching the level of 300 m high arch dam, 250 high CFRD (concrete face rockfill dam) and 200 m high RCC (roller compacted concrete) gravity dam. Due to the safety and the economy, the type selection for high dams has become the key issue during the argumentation for the hydropower projects, and further efforts are still needed in this aspect for high dams. After reviewing the high dam constructions in China and abroad, authors proposed some advices for the selection of dam types, and hope that it can provide some helpful information for the researches and the design of high dams.
文摘Selecting right equipment has been playing an important role in the success of construction projects. This paper presents a computer model, ESCMODEL, for equipment selection in Earth-fill dam projects. The proposed model is capable of assisting the users in making decisions to determine the size, number, type and schedule of presence of dozers, loaders, graders, excavators, trucks, sheepsfoot rollers and smooth wheel rollers. ESCMODEL can contribute to resolve this selection process through the application of an optimization technique, based on nonlinear programming. Three actual case studies of earth-fill dam projects are presented in order to illustrate the effectiveness and performance of the model.
