渠式切割水泥土连续墙TRD)在赣江某综合整治工程中的应用

引用文献:

徐晓兵 韩小凡 邓彪 胡琦 丁继民 刘羽. 渠式切割水泥土连续墙TRD)在赣江某综合整治工程中的应用[J]. 建筑结构,2023,48(10):144-151.

XU Xiaobing HAN Xiaofan DENG Biao HU Qi DING Jimin LIU Yu. Application of trench-cutting re-mixing deep-wall (TRD) in a comprehensive renovation project of Ganjiang River[J]. Building Structure,2023,48(10):144-151.

作者:徐晓兵 韩小凡 邓彪 胡琦 丁继民 刘羽
单位:浙江工业大学岩土工程研究所 东通岩土科技股份有限公司 中铁水利水电规划计集团有限公司 浙江天然工程勘察有限公司
摘要:在水利防渗工程中,渠式切割水泥土连续墙(TRD)作为防渗墙,其设计方法、施工控制要点和实施效果有待进一步的研究。依托江西赣江某综合整治工程,根据项目工程地质特点,比较不同防渗墙的施工优势,设计了联合双轮铣深层搅拌技术(CSM)的TRD施工方案,通过试成墙试验,确定了TRD的施工参数,并对成墙质量进行了钻孔取芯和地质雷达检测。试验结果表明:TRD防渗墙在富水圆砾地层中施工效果较好,成墙速度8~10m/d。钻孔取芯检测结果表明:芯样率较高,完整性好,防渗墙连续均匀;芯样无侧限抗压强度为1.4~1.9MPa,渗透系数小于1×10-6cm/s,强度、渗透性等满足防渗性能要求。地质雷达检测结果显示:TRD防渗墙成墙完整性好,墙体均匀连续且达到设计深度。
关键词:水利工程;防渗墙;TRD;CSM;富水圆砾地层;
作者简介:徐晓兵,博士,副教授,主要从事基坑工程、桩基工程等研究,Email:xiaobingxu@zjut.edu.cn。胡琦,博士,副教授,主要从事基坑工程、桩基工程等研究,Email:huqi@zjut.edu.cn。
基金:浙江省建设科研项目(2021K103);杭州市科协决策咨询项目(2022-16)。
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Application of trench-cutting re-mixing deep-wall (TRD) in a comprehensive renovation project of Ganjiang River
XU Xiaobing HAN Xiaofan DENG Biao HU Qi DING Jimin LIU Yu
(Institute of Geotechnical Engineering, Zhejiang University of Technology Dongtong Geotechnical Technology Co., Ltd. China Railway Hydropower Planning and Design Group Co., Ltd. Zhejiang Natural Engineering Survey Co., Ltd.)
Abstract: The design methods, construction control points and working performance of trench-cutting re-mixing deep-wall(TRD) as a diaphragm wall in water conservancy and seepage control projects need further study. Based on a comprehensive renovation project of Ganjiang river in Jiangxi Province, different types of diaphragm wall for seepage control were compared, and TRD combined with cutter soil mixing(CSM) technology was chosen according to the geological and engineering characteristics of the project. Through in-situ experiment, the construction parameters of TRD was determined. The quality of TRD after construction was investigated through laboratory tests on borehole drilled samples and in-situ ground penetrating radar(GPR) detection. The results show that the diaphragm wall using TRD has good construction feasibility in water-rich gravel stratum, and its formation speed can reach 8~10m/d. Laboratory tests on borehole drilled samples indicate that the core recovery rate is high, the integrity is good and the diaphragm wall is continuous and uniformity. The measured unconfined compressive strength is 1.4~1.9 MPa, and the permeability is smaller than 1×10-6cm/s, and the strength and permeability meet the requirements of working performance. The in-situ GPR detection results show that the constructed TRD has good integrity with uniform and continuous wall body reaching the designed depth.
Keywords: water conservancy project; diaphragm wall; TRD; CSM; water-rich gravel stratum
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