中国农村水利水电
中國農村水利水電
중국농촌수이수전
China Rural Water and Hydropower
2015年
9期
150-152,156
,共4页
张浩%张林%陈媛%杨宝全%汪罗
張浩%張林%陳媛%楊寶全%汪囉
장호%장림%진원%양보전%왕라
RCC拱坝%水化热%温度场%温度应力%分缝%有限元
RCC拱壩%水化熱%溫度場%溫度應力%分縫%有限元
RCC공패%수화열%온도장%온도응력%분봉%유한원
RCC arch dam%hydration heat%temperature field%temperature stress%joints%FEM
RCC拱坝由于其上升速度快、施工简单、超载能力强而得到广泛运用，但施工过程中层面散热不够，水化热温升较大，在周边基础的约束下而产生温度应力并可能导致温度裂缝，目前常采用分缝的方法释放过大的温度应力。结合某拱坝高温季节浇筑的碾压块，采用有限元方法，模拟了未分缝方案和2种分缝方案施工期的温度场及温度应力，总结了温度场的特点及变化规律，并对比分析了2种分缝方案对坝体温度应力的影响。
RCC拱壩由于其上升速度快、施工簡單、超載能力彊而得到廣汎運用，但施工過程中層麵散熱不夠，水化熱溫升較大，在週邊基礎的約束下而產生溫度應力併可能導緻溫度裂縫，目前常採用分縫的方法釋放過大的溫度應力。結閤某拱壩高溫季節澆築的碾壓塊，採用有限元方法，模擬瞭未分縫方案和2種分縫方案施工期的溫度場及溫度應力，總結瞭溫度場的特點及變化規律，併對比分析瞭2種分縫方案對壩體溫度應力的影響。
RCC공패유우기상승속도쾌、시공간단、초재능력강이득도엄범운용，단시공과정중층면산열불구，수화열온승교대，재주변기출적약속하이산생온도응력병가능도치온도렬봉，목전상채용분봉적방법석방과대적온도응력。결합모공패고온계절요축적년압괴，채용유한원방법，모의료미분봉방안화2충분봉방안시공기적온도장급온도응력，총결료온도장적특점급변화규률，병대비분석료2충분봉방안대패체온도응력적영향。
RCC Arch Dam is widely used due to its rapid and simple construction ,strong overcapacity ,but the hydration heat tem‐perature rise is large because of the thermal dissipation of rolling layers is not enough in the construction process and under the sur‐rounding constraints ,the temperature stress of dams will arise ,which may lead to temperature cracks .The method of setting joints is widely adopted to release excessive tensile stress .The temperature field and thermal stress of a rolling layer compacted in the high temperature season during the dam construction period is simulated and the characteristics and variation law s of temperature and tem‐perature stress is summarized and the effect of temperature stress under different jointing schemes is evaluated by utilizing the finite element method in this paper .
