(1 浙江工业大学岩土工程研究所, 杭州 310014; 2 东通岩土科技股份有限公司, 杭州 310002;3 中铁水利水电规划计集团有限公司, 南昌 330029; 4 浙江天然工程勘察有限公司, 温州 325000)

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

中图分类号:TV5,TU47 文献标志码:A 文章编号:1002-848X(2023)10-0144-08

DOI:10. 19701 / j. jzjg. LS220142

Application of trench-cutting re-mixing deep-wall (TRD) in a comprehensive renovation project of Ganjiang River

XU Xiaobing1,2, HAN Xiaofan1, DENG Biao3, HU Qi1,2, DING Jimin2, LIU Yu4

(1 Institute of Geotechnical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; 2 DongtongGeotechnical Technology Co. , Ltd. , Hangzhou 310002, China; 3 China Railway Hydropower Planning and Design GroupCo. , Ltd. , Nanchang 330029, China; 4 Zhejiang Natural Engineering Survey Co. , Ltd. , Wenzhou 325000, China)

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 acomprehensive renovation project of Ganjiang river in Jiangxi Province, different types of diaphragm wall for seepage controlwere compared, and TRD combined with cutter soil mixing (CSM) technology was chosen according to the geological andengineering 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-situground penetrating radar (GPR) detection. The results show that the diaphragm wall using TRD has good constructionfeasibility in water-rich gravel stratum, and its formation speed can reach 8 ~ 10m/ d. Laboratory tests on borehole drilledsamples indicate that the core recovery rate is high, the integrity is good and the diaphragm wall is continuous anduniformity. 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 detectionresults show that the constructed TRD has good integrity with uniform and continuous wall body reaching the designeddepth.

Keywords:water conservancy project; diaphragm wall; TRD; CSM; water-rich gravel stratum

∗浙江省建设科研项目(2021K103),杭州市科协决策咨询项目(2022-16).

第一作者: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.

[引用本文] 徐晓兵,韩小凡,邓彪,等. 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,2023,53(10):144-151. XU Xiaobing,HAN Xiaofan,DENG Biao,et al. Application of trench-cutting re-mixing deep-wall (TRD)in a comprehensive renovation project of Ganjiang River[J]. Building Structure,2023,53(10):144-151.