CAJ | 학술논문

Hardfill坝是一种新坝型.首先研究了Hardfill材料的弹性模量和徐变度,然后根据Hardfill坝的材料、结构和施工特点,基于有限单元法,对100 m高的Hardfill坝的施工期和运行期的温度场、应力场进行全过程仿真计算.分析结果表明:在Hardfill坝中,由基础温差产生的温度应力已经不再是控制性因素;同时,Hardfill坝依然存在由于内外温差引起的表面拉应力.提出了一种设表面缝而不设贯穿横缝的Hardfill坝分缝方案,既能保证大坝表面的抗裂安全,又能减小对坝体施工的干扰,可为工程设计提供参考.
Hardfill패시일충신패형.수선연구료Hardfill재료적탄성모량화서변도,연후근거Hardfill패적재료、결구화시공특점,기우유한단원법,대100 m고적Hardfill패적시공기화운행기적온도장、응력장진행전과정방진계산.분석결과표명:재Hardfill패중,유기출온차산생적온도응력이경불재시공제성인소;동시,Hardfill패의연존재유우내외온차인기적표면랍응력.제출료일충설표면봉이불설관천횡봉적Hardfill패분봉방안,기능보증대패표면적항렬안전,우능감소대패체시공적간우,가위공정설계제공삼고.
Hardfill dam is a new type dam. Because its material and construction way are different from general concrete dams, the stress distribution possesses the features in itself. The elasticity modulus and specific creep of the Hardfill material are studied at first, and then, on the basis of the characteristics of material, structure and construction of the dam, a whole simulation procedure is developed by using the finite element method so as to analyse the temperature and stress fields of the Hardfill dam. The research results show that the foundation temperature difference is not a critical factor, and that tensile stresses still exist because of the temperature difference between the surface and inside of the dam. A corresponding improved design scheme is proposed, in which setting surface joints substitutes for penetrating joints to guarantee the anti-fracture safety of the dam surface and decrease the disturbance to dam construction.