摘要
全(强)风化岩体、松散土层、砂砾层、节理裂隙密集发育岩体等松软透水岩土体的防渗加固工程中存在钻孔易塌孔,灌浆难起压易导致垂向挤密抬动,灌浆易漏浆串浆导致耗浆量大,灌浆过程难控制等技术难题,研究提出"自下而上、浆体封闭、高压脉动灌浆"新工法,技术之一是基于以浆止浆的理念,钻孔后,在灌浆管与孔壁间注入封闭浆体材料,在注浆过程中达到消能阻浆的目的,技术之二是采用脉动高压实现对灌浆段的有效控制灌浆,使松软地层的土体强度与防渗性能得到较均匀有效提高,可实现自下而上,连续小间隔提管灌浆,极大地提高工效。在托口水电站河湾地块进行系列现场灌浆试验表明,该工法完全可行,且较大地节省成本,提高了工效,可在类似地层防渗加固工程中推广应用。
It was difficult which collapsing holes easily,generating uplift easily,wasting slurry largely,grouting process uncontrollability while grouting soft ground such as all(strong) weathered rock,loose soil,gravel,rock jointed intensive development.A new kind of construction technology that 'High pulsating pressure grouting from bottom to up stemming with slurry' has been put forward.One of the key technology is stemming filling slurry between the tube and the borehole based on the idea which stemming with slurry,the other is that high pulsating pressure grouting.The soil performance about strength and anti-seepage of the soft strata are more uniform and effective through the grouting method that continue lift tube in small intervals from bottom to up and then greatly improve work efficiency.The series plots field trial in the bend bay of Tuokou Hydropower Station show that the construction method is entirely feasible,cost-savings and can improve efficiency,and applicable in the similar ground to anti-seepage.
出处
《水利水电技术》
CSCD
北大核心
2012年第3期38-41,共4页
Water Resources and Hydropower Engineering
基金
中国电力投资集团公司重大科技计划项目(2011-036-WLD-KJ-X)
关键词
松软地层
脉动灌浆压力
灌浆试验
浆体封闭
托口水电站
soft ground
pulse pressure grouting
grouting test
stemming with slurry
Tuokou Hydropower Station
