
第29卷第6期 2017年12月
浙江水利水电学院学报
J. Zhejiang Univ of Wat. Res & Electric Pow.
DOI: 10. 3969/j. issn. 2095-7092. 2017. 06. 005
无填料振冲法在海塘地基处理中的应用
余锦地’,鲍红艳,朱亚磊
(1.浙江省水利水电勘测设计院,浙江杭州310002;2.杭州市闲林水库管理处,浙江杭州311122)
Vol.29No.6 Dec.2017
摘要:为有效提高海塘建筑物地基的均匀性、减小工后况降和消除不均匀况降,以渐江省杭州市钱塘江区域一海塘工程为例,采用无填科振冲法对基础范图内进行加密.从理论计算和现场检测两个方面分析了该地基处理的效
关键词:无填料加密;振冲加固;地基处理
中图分类号:TV223
文献标志码:A
文章编号:1008536X(2017)06-0019-04
ApplicationofPackless Vibroflotation inTreatment of SeawallFoundation
YU Jin-di', BAO Hong-yan, ZHU Ya-ei
( 1. Zhejiang Design Institute of Water Conservancy and Hydro Electric Power, Hangzhou 310002, China ;
2. Hangzhou Xianlin Reservoir Management Office , Hangzhou 311122, China)
Abstract : To improve the homogeneity of seawall construction foundation , reduce the settlement and eliminate uneven set -tlement after work , the base scope is compacted by packless vibroflotation . This foundation treatment method can use local materials, reduce project costs and construction difficulty , as well as shorten construction period , making the foundation to reach the medium to dense state after vibroflotation treatment , This foundation treatment techniuqe has great social and eco nomice benefits as a promising foundation reinforcement method . Combined with the engineering example , the creative appli-cation of packless vibroflotation in seawall foundation treatment is introduced , the effect of the foundation treatment from
theoretical calculation and field test is analyzed , providing technical support for similar foundation treatment . Key words : packless vibrating densifying method ; vibroflotation reinforcement ; foundation treatment
振冲法加固粉砂土地基具有工艺简单、经济实用和效果显著等优点,得到广泛的应用.振冲法加固粉砂土地基主要有2种方法,即无填料加固和填料加固.填料加固法一般在处理中粗砂地基中应用,利用碎石、矿渣等填料形成桩体,填料量大,工程质量不易控制和检验,难以解决场地的不均匀沉降问题.无填料加固法是在振冲器水平振动和高压水的共同作用下,使松散碎石土、砂土、粉土、人工填土等土体振密,以达到消除地基液化、减小建筑物地基不均勾沉降、提高地基承载力的目的2-3],工程实践表明,只要采用正确的施工工艺和参数,该
收稿日期:2017-04-27
作者简介:余锦地(1983-),男,福建南安人,高级工程师,主要从事水利工程方面的设计工作
万方数据
法加固粉砂土地基效果明显,能满足工程的质量和
进度控制要求4]. 1工程概况
工程位于浙江省杭州市钱塘江区域G20峰会所在地,原始地面高程5.00m左右,区内出露的地层主要为冲海积、冲洪积的粉土、粉质粘土、粉细砂以及海积、湖沼积的淤泥质粘土、淤泥、粉质粘土,新建海塘段位于钱塘江滩涂面上,根据地质资料成果,海塘地基为Ⅱ1粘质、砂质粉土,其下依次由Ⅱ2 砂质粉土、Ⅱ3粉土夹粉砂、Ⅲ1粉砂夹粉土、Ⅲ2粉细砂、V淤泥质粘土等组成,表层土体标准贯入击数在3~8击,为松散土体工程区地质条件(见表1).