大体积承台施工阶段温度场分析及控制方法研究  

Study on Temperature Field Analysis and Control Method in Construction Stage of Large-volume Platform

作　　者：谢开仲 李欣宜 王红伟[1] XIE Kai-zhong LI Xin-yi WANG Hong-wei(Guangxi University, Nanning, Guangxi, 53000)

机构地区：[1]广西大学,广西南宁530004

出　　处：《西部交通科技》2017年第10期50-54,107,共6页Western China Communications Science & Technology

基　　金：国家自然科学基金项目(51368005和51068001);广西重点实验室系统性研究项目资助(2012ZDX04)

摘　　要：为了研究大体积承台施工阶段的温度场及相应的裂缝控制方法,文章基于水化热温度传导理论,采用有限元分析方法,以某大跨度连续刚构桥的大体积混凝土桩承台为工程实例,分别考虑冷却水管作用、保温层作用,对施工期间的大体积混凝土水化热温度场进行了分析研究,结果表明:承台冷却管布置方案能够保证各控制点内外温差在合理范围内,温度变化产生的拉应力在允许范围内,有效控制了承台开裂,保证了施工质量,理论计算结果可为同类桥梁的大体积混凝土施工提供借鉴和参考。In order to study the temperature field and the corresponding crack control method in the construction stage of large-volume platform, based on the hydration heat temperature conduction the- ory and through finite element analysis method, and with the mass concrete pile platform of a large- span continuous rigid frame bridge as the engineering example, this article conducted the analysis study on the mass concrete hydration heat temperature field during the construction by respectively considering the role of water cooling pipes and insulation layer, the results showed that the cooling pipe layout plan of bearing platform can ensure that the inside and outside temperature difference of all control points is within the reasonable range, and the tensile stress produced by temperature change is within the allowable range,which effectively controlled the cracking of the platform and en- sured the construction quality, and the theoretical calculation result can provide reference for the mass concrete construction of the same kind of bridge.

关 键 词：大体积混凝土 承台 水化热 温度场 控制方法 

分 类 号：U443.25[建筑科学—桥梁与隧道工程]