摘要
本文结合工程实例,介绍广西某尾矿库完成抢险后先对渗漏区域内深部的溶洞和大裂隙进行托底固结灌浆,后对因渗漏及其抢险回填黏性土和赤泥等可灌性差软弱土进行高压旋喷灌浆,形成灌浆防渗帷幕。因渗漏区域内深部的溶洞等托底固结灌浆对防渗要求不高,通过灌注混凝土和水泥砂浆方式进行封闭并形成对上部回填土的支撑体;而对渗漏区域浅部的回填土和赤泥等可灌性差的地层,采取高压旋喷灌浆法对其进行灌浆防渗加固处理,提高其防渗能力和承载力,避免因其变形或不均匀沉降而造成其上部覆盖的防渗土工膜破损,有效地防止尾矿库内碱水渗漏和赤泥外泄,保护当地地下水水质和环境。
This paper introduces grouting construction process for leakage-block of a tailing pond in Guangxi.Firstly bottom consolidation grouting on deep karst caves and large cracks in the seepage area was carried out,and then high-pressure rotary jet grouting in soft soil with poor groutability such as cohesive soil and red mud due to leakage and emergency backfill was conducted.Thus a grouting impervious curtain formed.Due to the low requirement for seepage prevention by consolidation grouting at the bottom of the deep karst cave in the seepage area,concrete and cement mortar were poured to seal and form a support for the upper backfill soil.On the other hand,the backfill soil and red mud in the shallow part of the seepage area were treated with high-pressure rotary jet grouting to prevent seepage and reinforcement,so as to improve their anti-seepage ability and bearing capacity.It also can avoid the damage of the anti-seepage geomembrane covered on the upper part due to deformation or uneven settlement,and effectively prevent alkali water leakage and red mud leakage in the tailings pond,and protect the local groundwater quality and environment.
作者
韦兴标
何德顺
冯周飞
WEI Xing-biao;HE De-shun;FENG Zhou-fei(Guangxi Institute of Hydrogeology and Engineering Geology,Liuzhou 545006,China;Guangxi Hezhou Pinggui District Natural Resources Bureau,Hezhou 542827,China)
出处
《地基处理》
2020年第2期148-152,共5页
Journal of Ground Improvement
关键词
尾矿库
渗漏
溶洞
托底固结灌浆
高压旋喷灌浆
帷幕灌浆
tailings pond
leakage
karst cave
bottom consolidation grouting
high pressure rotary jet grouting
curtain grouting
作者简介
韦兴标(1967-),广西水文地质工程地质勘察院高级工程师,探矿工程专业,从事钻孔灌注桩、软土地基加固、深基坑支护等施工技术与管理工作。E-mail:weixb878111@163.com。
