大體積砼測溫方案.doc
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大體積砼測溫
大體積砼澆筑完畢，只是大體積砼施工的初步成功，如何防止?jié)仓蟮捻旁陴B(yǎng)護期間發(fā)生裂縫，尤其是深層裂縫，是大體積砼施工一個極為關(guān)鍵的問題。對澆筑后的砼進行測溫監(jiān)控，隨時掌握砼的溫度變化動態(tài)，并以此來指導(dǎo)砼的養(yǎng)護工作，使養(yǎng)護工作更加科學(xué)有效，即實行“信息化”施工。這是大體積砼施工所必不可少的手段。
(1) 測溫目的
在施工以前進行必要的砼熱工計算， 對砼的內(nèi)部最高溫度、表面溫度、溫度收縮應(yīng)力等進行計算，實際是否與其符合，且砼實際溫度變化情況究竟如何、養(yǎng)護的效果如何等，只有經(jīng)過現(xiàn)場測溫，才能掌握。通過測溫，將砼深度方向的溫度梯度控制在規(guī)范允許范圍以內(nèi)，同時，通過測溫，由于對砼內(nèi)部溫度，各關(guān)鍵部位溫差等精確掌握，還可以根據(jù)實際情況，盡可能地縮短養(yǎng)護周期，使后續(xù)工序盡早開始，加快施工進度，并節(jié)約成本。
(2) 布點方案
根據(jù)工程平面形狀，底板厚度尺寸布點，在
Mass Concrete Temperature
Pouring Mass finished, only the initial construction of mass concrete success, how to prevent the pouring of concrete in the maintenance period after the occurrence of cracks, especially in deep cracks in mass concrete construction an extremely critical issue. Carried out after pouring concrete on the temperature control, keep track of the dynamic change in temperature of concrete and concrete in order to guide conservation work, to make conservation work more scientific and effective, that the implementation of the "information" of the construction. This is essential for mass concrete construction means.
(1) temperature measurement purposes
Necessary before the construction of concrete thermal calculation of the maximum internal concrete temperature, surface temperature, thermal stress and other calculations, the actual meet with her, and concrete changes in how the actual temperature, the effect of how conservation and so on, only after scene temperature, to master. By temperature, the depth of the concrete control the direction of the temperature gradient within specification allows the same time, through temperature, due to the internal concrete temperature, the temperature differences and to understand precisely the critical parts can also be based on the actual situation, the conservation period as short as possible to follow-up process began as early as possible to speed up the construction progress and cost savings.
(2) distribution program
According to project flat shape, size distribution floor thickness, in