风机基础大体积混凝土裂缝加固措施研究
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摘要
以风电场为背景,通过调研相关工程,分析了风机基础锚栓松动原因,并提出了解决方案,得出以下结论:风机基础大体积混凝土出现裂缝,导致风机锚栓预拉力降低,出现松动现象;风机基础大体积混凝土裂缝包括温度裂缝、收缩裂缝及荷载裂缝;通过分别灌注水泥及环氧浆液,可治理风机基础大体积混凝土内部不同裂缝,满足风机运行要求。
This paper analyses the reasons why the anchor bolts of wind turbines foundation become flexible and puts forward the solution by investigating and surveying concerned projects, the obtained conclusions are as follows: Fissures exists in the mass concrete of wind turbines foundation which leads to lower pre-tension of the anchor bolts and the anchor bolts become flexible. The fissures existed in the mass concrete of wind turbines foundation contain temperature fissures、shrink fissures and load fissures. By grouting cement and epoxy slurry respectively, the fissures existed in the mass concrete of wind turbines foundation can be repaired and the wind turbines can operate properly.
This paper analyses the reasons why the anchor bolts of wind turbines foundation become flexible and puts forward the solution by investigating and surveying concerned projects, the obtained conclusions are as follows: Fissures exists in the mass concrete of wind turbines foundation which leads to lower pre-tension of the anchor bolts and the anchor bolts become flexible. The fissures existed in the mass concrete of wind turbines foundation contain temperature fissures、shrink fissures and load fissures. By grouting cement and epoxy slurry respectively, the fissures existed in the mass concrete of wind turbines foundation can be repaired and the wind turbines can operate properly.
引文
[1] 陈桂林,姜玮.大体积混凝土施工温度裂缝控制研究进展[J].自然灾害学报,2016,25 (3):159-164.
[2] 徐驰. 超声波在风机基础内部损伤检测中的应用研究[D].湘潭:湖南科技大学,2016.
[3] 文帅. 高温风机基础抗裂性能研究[D].武汉:武汉理工大学,2009.
[4] 孙增智,田俊壮,石强,刘等.承台大体积混凝土里表温差梯度与温差应力有限元模拟[J].交通运输工程学报,2016,16(2):18-26,36.
[5] 陈亮,柯敏勇.风机基础温度裂缝控制及实施效果[J].山西建筑,2016,42(27):96-97.
[6] HeAP M J, LAVALLEE Y , LAUMANN A . The influence of thermal-stressing (up to 100℃) on the physical, mechanical , and chemical properties of siliceous-aggregate, high-strength concrete [J]. Construction and building materials, 2013, 42(5):248-265.
[7] CONCEICAO J, FARIA R, AZENHA M. Early-age behavior of the concrete surrounding a turbine spiral case: monitoring and thermos-mechanical modeling [J]. Engineering structures, 2014,81:327-340.
[8] 王诚杰,宋杨,王雷,等.环氧砂浆抗折强度影响因素研究[J].新型建筑材料,2017,44(9):84-87.
[9] 曾娟娟,杨元龙.柔韧性环氧树脂堵漏材料固化剂的研制[J].中国建筑防水,2017(20):1-5.
[2] 徐驰. 超声波在风机基础内部损伤检测中的应用研究[D].湘潭:湖南科技大学,2016.
[3] 文帅. 高温风机基础抗裂性能研究[D].武汉:武汉理工大学,2009.
[4] 孙增智,田俊壮,石强,刘等.承台大体积混凝土里表温差梯度与温差应力有限元模拟[J].交通运输工程学报,2016,16(2):18-26,36.
[5] 陈亮,柯敏勇.风机基础温度裂缝控制及实施效果[J].山西建筑,2016,42(27):96-97.
[6] HeAP M J, LAVALLEE Y , LAUMANN A . The influence of thermal-stressing (up to 100℃) on the physical, mechanical , and chemical properties of siliceous-aggregate, high-strength concrete [J]. Construction and building materials, 2013, 42(5):248-265.
[7] CONCEICAO J, FARIA R, AZENHA M. Early-age behavior of the concrete surrounding a turbine spiral case: monitoring and thermos-mechanical modeling [J]. Engineering structures, 2014,81:327-340.
[8] 王诚杰,宋杨,王雷,等.环氧砂浆抗折强度影响因素研究[J].新型建筑材料,2017,44(9):84-87.
[9] 曾娟娟,杨元龙.柔韧性环氧树脂堵漏材料固化剂的研制[J].中国建筑防水,2017(20):1-5.