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(1 浙江工業(yè)大學(xué)巖土工程研究所, 杭州 310014; 2 東通巖土科技股份有限公司, 杭州 310002;3 中鐵水利水電規(guī)劃計(jì)集團(tuán)有限公司, 南昌 330029; 4 浙江天然工程勘察有限公司, 溫州 325000)
摘要: 在水利防滲工程中,渠式切割水泥土連續(xù)墻(TRD)作為防滲墻,其設(shè)計(jì)方法、施工控制要點(diǎn)和實(shí)施效果有待進(jìn)一步的研究. 依托江西贛江某綜合整治工程,根據(jù)項(xiàng)目工程地質(zhì)特點(diǎn),比較不同防滲墻的施工優(yōu)勢,設(shè)計(jì)了聯(lián)合雙輪銑深層攪拌技術(shù)(CSM)的 TRD 施工方案,通過試成墻試驗(yàn),確定了 TRD 的施工參數(shù),并對成墻質(zhì)量進(jìn)行了鉆孔取芯和地質(zhì)雷達(dá)檢測. 試驗(yàn)結(jié)果表明:TRD 防滲墻在富水圓礫地層中施工效果較好,成墻速度 8 ~ 10m/ d. 鉆孔取芯檢測結(jié)果表明:芯樣率較高,完整性好,防滲墻連續(xù)均勻;芯樣無側(cè)限抗壓強(qiáng)度為 1. 4 ~ 1. 9MPa,滲透系數(shù)小于 1×10-6cm/ s,強(qiáng)度、滲透性等滿足防滲性能要求. 地質(zhì)雷達(dá)檢測結(jié)果顯示:TRD 防滲墻成墻完整性好,墻體均勻連續(xù)且達(dá)到設(shè)計(jì)深度.
關(guān)鍵詞: 水利工程; 防滲墻; TRD; CSM; 富水圓礫地層
中圖分類號:TV5,TU47 文獻(xiàn)標(biāo)志碼:A 文章編號: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
∗浙江省建設(shè)科研項(xiàng)目(2021K103),杭州市科協(xié)決策咨詢項(xiàng)目(2022-16).
第一作者:徐曉兵,博士,副教授,主要從事基坑工程、樁基工程等研究,Email: xiaobingxu@ zjut. edu. cn.
[引用本文] 徐曉兵,韓小凡,鄧彪,等. 渠式切割水泥土連續(xù)墻(TRD)在贛江某綜合整治工程中的應(yīng)用[J]. 建筑結(jié)構(gòu),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.
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