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(金陵科技學(xué)院建筑工程學(xué)院， 南京 211169)
［摘要］動(dòng)態(tài)養(yǎng)護(hù)技術(shù)是大體積混凝土基礎(chǔ)施工期養(yǎng)護(hù)的有效措施，可有效動(dòng)態(tài)控制基礎(chǔ)內(nèi)外溫差及溫降速率，降低早期開裂風(fēng)險(xiǎn)。系統(tǒng)開展了蓄水外保溫及水管內(nèi)冷卻兩類動(dòng)態(tài)養(yǎng)護(hù)技術(shù)的控制因素分析，明確了各控制因素對基礎(chǔ)內(nèi)部溫度峰值、內(nèi)外溫差的作用效應(yīng)，并相應(yīng)提出大體積混凝土早期溫控施工建議。分析結(jié)果表明：蓄水水溫和降溫速度是蓄水外保溫措施的重要溫控指標(biāo)，而開始蓄水時(shí)間影響較小；水管內(nèi)冷卻措施關(guān)鍵控制因素有水管間距、開始通水時(shí)間、通水水溫和持續(xù)通水天數(shù)，通水流量影響較小。研究成果可為制定大體積混凝土基礎(chǔ)動(dòng)態(tài)養(yǎng)護(hù)方案提供理論支持。
［關(guān)鍵詞］大體積混凝土基礎(chǔ)；動(dòng)態(tài)養(yǎng)護(hù)；蓄水保溫；水管冷卻；控制因素
中圖分類號：TU375 文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2021)20-0124-07
Analysis on controlling factors of dynamic curing of mass concrete foundation
WANG Panxiu, XUAN Weihong, WANG Yao, HUANG Donghui
(Architectural Engineering Institute, Jinling Institute of Technology, Nanjing 211169， China)
Abstract: The dynamic curing technology is an effective measure for mass concrete foundation under construction. It is useful to control the temperature difference between inside and outside of the foundation and the cooling rate, dynamically, and reduce the early cracking risk. The analysis of the controlling factors of two types of dynamic curing technologies, named water insulation and pipe cooling were systematically discussed, the influence of controlling factors on the maximum internal temperature and the temperature difference between inside and outside was defined. Finally, some suggestions for early temperature control of mass concrete construction were put forward. The results show that: water temperature and cooling rate are important temperature control indicators of water insulation measures, followed by the starting time. When using the pipe cooling method, pipe distance, starting time, water temperature and cooling duration are more important than water flow. These conclusions can provide theoretical support for make up the dynamic maintenance plan of mass concrete foundation.
Keywords:mass concrete foundation； dynamic curing； water insulation； pipe cooling； controlling factors
*國家自然科學(xué)基金青年科學(xué)基金項(xiàng)目（51708265），江蘇省自然科學(xué)基金青年基金項(xiàng)目（BK20160106）。
作者簡介：王潘繡，博士，副教授，Email：Wangpanxiu@jit.edu.cn。
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