TRD水泥土搅拌墙在基坑工程中的应用
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摘要
TRD地下水泥土搅拌墙能有效利用现有地层中的软土,减少排放,已经在越来越多的工程中投入使用。TRD地下水泥土搅拌墙+支护桩首次应用在武汉复地汉正街基坑工程中,通过室内试验确定了TRD试成墙的施工参数;钻孔取芯进行成墙质量检测分析;28d龄期的渗透试验,满足强度和抗渗要求;采用天汉软件计算墙体水平位移并与实测值对比,墙体水平位移均控制在规范允许范围,为在武汉软土地区大型深基坑支护提供一种新型的实用方法。
TRD can effectively utilize the soft soil on the existing stratum to reduce the emission,and it has been put in use in more and more projects.The joint use of TRD and supporting piles was firstly applied in the Foundation Pit Engineering in Wuhan Forte of Hanzheng Street.The construction parameters of TRD has been confirmed by the laboratory test;drilling for cores was carried out for the quality test analysis of TRD;after 28-day penetration test,it was discovered that strength and impermeability requirements were meet;after the horizontal displacement of diaphragm walls was calculated by means of Tianhan Software and was compared with the measured values,it was found that the horizontal displacement of diaphragm walls were all controlled in the standard allowable range,which provides a new practical method for the large foundation pit engineering in the soft area of Wuhan.
TRD can effectively utilize the soft soil on the existing stratum to reduce the emission,and it has been put in use in more and more projects.The joint use of TRD and supporting piles was firstly applied in the Foundation Pit Engineering in Wuhan Forte of Hanzheng Street.The construction parameters of TRD has been confirmed by the laboratory test;drilling for cores was carried out for the quality test analysis of TRD;after 28-day penetration test,it was discovered that strength and impermeability requirements were meet;after the horizontal displacement of diaphragm walls was calculated by means of Tianhan Software and was compared with the measured values,it was found that the horizontal displacement of diaphragm walls were all controlled in the standard allowable range,which provides a new practical method for the large foundation pit engineering in the soft area of Wuhan.
引文
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[3]李星,谢兆良,李进军,等.TRD工法及其深基坑工程中的应用[J].地下空间与工程学报,2011,7(5):945-950.
[4]王刚,张少钦.TRD围护结构深基坑施工监测及结果分析[J].施工技术,2012,45(379):8-12.
[5]王刚.TRD围护结构深基坑施工变形规律研究[D].南昌:南昌航空大学,2013.
[6]吴炜.地下连续墙施工技术难点的处理对策[J].中国高新技术企业,2014,7(5):78-80.
[7]邓金城.谈TRD水泥土搅拌墙在地下围护体系中的应用优势[J].四川建材,2016,42(10):136-138.
[8]中华人民共和国水利部.SL237-017-1999.土工试验规程[S].南京:中国水利水电出版社,1999.