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1、青島建設(shè)集團(tuán)公司企業(yè)工法QDCG-GF12001混凝土結(jié)構(gòu)地下室抗裂防滲工法ConstructionMethodofResistingCrackandPreventingInfiltrationofReinforced-ConcreteStructureBasement2004-12-30發(fā)布2005-3-1實(shí)施青島建設(shè)集團(tuán)公司發(fā)布17目次1.前言··································································22.特點(diǎn)·····································
2、·····························23.適用范圍·····························································24.工藝原理·····························································25.設(shè)計(jì)及構(gòu)造要求·····················································26.混凝土配合比的優(yōu)化及材料要求··································57.工
3、藝流程·····························································68.17操作要點(diǎn)·····························································69.機(jī)具設(shè)備····························································1110.勞動(dòng)組織···························································1111.安全要求·····
4、······················································1212.質(zhì)量要求···························································1313.效益分析···························································1314.應(yīng)用實(shí)例···························································14171前言本工法是在試驗(yàn)研究，和總結(jié)集團(tuán)公司大
5、型地下室工程實(shí)踐，并吸收國內(nèi)外超長大體積混凝土結(jié)構(gòu)地下室工程先進(jìn)技術(shù)的基礎(chǔ)上，編制形成的。其中所涉及的大型工程有：中級(jí)法院綜合審判樓，會(huì)展中心，裕源大廈，都市華庭，東部醫(yī)院，流亭機(jī)場航站樓，兗州市政府辦公樓等工程。2特點(diǎn)本工法結(jié)合設(shè)計(jì)、材料、施工工藝三方面，提出了防止混凝土結(jié)構(gòu)地下室開裂及滲漏的綜合技術(shù)措施，可以有效地解決地下室結(jié)構(gòu)開裂及滲漏的問題，具有明顯的技術(shù)經(jīng)濟(jì)效果。本工法既有充分的理論依據(jù)，又有很強(qiáng)的可操作性。對(duì)地下室工程的設(shè)計(jì)和施工均具有指導(dǎo)意義。3適用范圍本工法適用于超長及大體積混凝土結(jié)構(gòu)地下室工程，也可用于指導(dǎo)一般的混凝土結(jié)構(gòu)地下室工程的施工。4
6、工藝原理利用后澆帶、加強(qiáng)帶、間歇式加強(qiáng)帶的原理減小超長混凝土結(jié)構(gòu)的收縮應(yīng)力，控制其裂縫；通過摻加粉煤灰、聚丙烯纖維、外加劑等措施，優(yōu)化混凝土配合比，降低大體積混凝土的水化熱，增強(qiáng)混凝土的抗裂性能，及混凝土的密實(shí)性和可操作性。本工法依據(jù)國家現(xiàn)行混凝土結(jié)構(gòu)設(shè)計(jì)、施工質(zhì)量驗(yàn)收等技術(shù)規(guī)范，混凝土結(jié)構(gòu)及材料理論，集團(tuán)公司的最新試驗(yàn)研究和理論分析成果。5設(shè)計(jì)及構(gòu)造要求5.1后澆帶、加強(qiáng)帶5.1.1后澆帶的分類后澆帶按作用分可分為三種：用于解決高層主體與低層裙房的差異沉降者，稱為后澆沉降帶；用于解決鋼筋混凝土收縮變形者，稱為后澆收縮帶；用于解決混凝土溫度應(yīng)力者，稱為后澆溫度
7、帶。5.1.2設(shè)置及構(gòu)造（1）后澆帶應(yīng)設(shè)在受力和變形較小的部位，寬度宜為700～1000mm。后澆帶的間距應(yīng)根據(jù)結(jié)構(gòu)級(jí)結(jié)構(gòu)約束條件確定，宜為30～60m。后澆帶的設(shè)置還應(yīng)與施工段的劃分相結(jié)合；在間距允許的情況下，應(yīng)避免在主樓設(shè)置后澆帶，以利于各工序的穿插和工程進(jìn)展。（2）后澆帶可做成平縫和企口縫，見圖8.4.117；后澆收縮帶結(jié)構(gòu)主筋可不斷開，如必須斷開時(shí)，主筋應(yīng)采用焊接連接；沉降式后澆帶結(jié)構(gòu)主筋應(yīng)斷開，主筋應(yīng)采用搭接，搭接長度不小于45d。后澆帶部位鋼筋應(yīng)嚴(yán)格按照設(shè)計(jì)要求加設(shè)附加鋼筋。（3）底板后澆帶可設(shè)計(jì)為下凹式，以減少清理后澆帶的難度，避免該部位的滲漏，
8、見圖8.4.1。（4）后澆帶應(yīng)采用補(bǔ)償
