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（1 國(guó)家林業(yè)局管理干部學(xué)院， 北京 102600； 2 中鋼集團(tuán)有限責(zé)任公司， 北京 100080；

3 中鐵六局集團(tuán)呼和浩特鐵路建設(shè)有限公司， 呼和浩特 010050）

［摘要］大體積混凝土裂縫出現(xiàn)有多方面原因，主要原因是水泥水化熱控制不當(dāng)導(dǎo)致的。本文通過對(duì)北京市某住宅樓筏板式基礎(chǔ)大體積混凝土施工實(shí)例分析，對(duì)大體積混凝土施工中水泥水化熱、外界氣溫變化、混凝土的收縮等因素導(dǎo)致的混凝土出現(xiàn)裂縫有針對(duì)性地進(jìn)行系統(tǒng)分析并提出了解決方案，在實(shí)際實(shí)施工程中得到較好應(yīng)用，取得良好效果。

［關(guān)鍵詞］大體積混凝土； 裂縫； 水化熱； 溫差； 配合比

中圖分類號(hào)： TU471+.15 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  1002-848X(2016)S1-0810-03

Discussion on construction crack control of mass concrete of the raft foundation

Zhao Xiaohuang1, Cheng Yuxia2, Cheng Yulin3

(1 State Academy of Forestry Administration, Beijing 102600, China; 2 Sinosteel Corporation, Beijing 100080, China;

3 China Railway Group Six Hohhot Railway Bureau Construction Co., Ltd.， Hohhot 010050, China )

Abstract： Mass concrete crack appeared has many reasons, main reasons for cement hydration hot control improper led to of, paper through on Beijing a engineering construction of residential floor raft plate based mass concrete construction instance, on mass concrete construction in the cement hydration hot, and outside temperatures changes, and concrete of contraction, factors led to of concrete appeared crack has targeted for system analysis and proposed has solution programme, in actual implementation engineering in the get better application, made good effect.

Keywords: mass concrete； crack； hydrated heat； range of temperature； combining scale