大体积混凝土承台水化热温度分析与控制.pdf

湖南大学
硕士学位论文
大体积混凝土承台水化热温度分析与控制
姓名:卢二侠
申请学位级别:硕士
专业:桥梁与隧道工程
指导教师:王解军
20070508
大体积混凝土承台水化热温度分析与控制
摘要
近年来,随着工程建设规模的增大,大体积混凝土水化热的控制问题已经引
起桥梁工程界的高度重视。虽然在混凝土大坝的设计、施工中对于大体积混凝土
水化热温度场的研究有了长足的进步,但是目前能够结合桥梁的自身特点把各种
因素对温度场的影响情况给较精确的计算出来的研究是很必要的。
针对以上情况本文主要内容如下:
。然后以龙潭
河特大桥为工程背景,介绍了几个大体积混凝土承台进行水化热温度控制的详细
过程,并对其实测与计算的数据结果进行了比较和分析。
MIDAS/Civil 对大体积混凝土承台,按照实际冷却水
管的布置、水流情况、边界条件、实际施工过程等因素进行了全程水化热温度场
的仿真分析。使考虑了冷却水管作用后的三维水化热温度场的模拟成为现实。通
过对实测温度场和计算温度场的分析得出了许多有益结论。

体积混凝土中部的温度,使混凝土内温度变化更加均匀,减少混凝土内外的温差。

关键词:大体积混凝土;水化热温度场;冷却水管;有限元仿真;冷却水管的布
置







II
硕士学位论文
Abstract
In recent years, bridge engineering have paid close attention to controlling of
massive concrete hydration with increasing size of the project,we have maken rapid
progress of study for massive concrete hydration in the concrete dam's designing and
now it’s necessary to calculate out the effect instance that caused by
various factors on the impact of the temperature field with bination to the
inherent characteristics.
In this article, we summarize the main content according to upwards conditions
as follows:
the theory foundation of hydration heat analysis and the method
of some main parameter introduce the hydration temperature controlling
process of several mass concrete pile cap for Longtan River special big
pare and analyze it's data result with measuring and calculation.
analyze the whole journey hydration temperature field of
mass concrete pile cap with the three-dimensional finite element software MIDAS
/Civil, which according to the actual water pipe arrangement cooling down, streams
condition and various different border factors ,actual construction make
the hydration heat three-dimension simulation to be realy after considering the
cooling the way of appling measure