基于双粘型防水材料的高水压隧道新型堵水限排方案及设计方法
A Novel Limited Drainage Scheme and Design Method for High Water Pressure Tunnel Based on Double-Bonded Waterproofing Membrane
孙晓贺 1施成华 1肖国庆 2葛洋洋3
作者信息
- 1. 中南大学土木工程学院,湖南 长沙 410075
- 2. 中国电建集团中南勘测设计研究院有限公司,湖南 长沙 410014
- 3. 北京东方雨虹防水技术股份有限公司 特种功能防水材料国家重点实验室,北京 101309
- 折叠
摘要
为解决高水压隧道渗漏水病害并减少治理成本,基于双粘型喷膜防水材料,提出一种由注浆加固圈、双粘型防排水系统和防水衬砌 3 部分组成的新型堵水限排方案.依托数值计算方法,揭示该方案的水压分布特征并论证其有效性,进而分析注浆圈及排水板各参数对隧道涌水量及衬砌水压力的影响规律;在此基础上,提出高水压隧道多级控制型限排方案的设计方法.研究结果表明:1)新型堵水限排方案可通过调节注浆圈及排水板参数使二次衬砌水压力降低到可接受范围;2)与传统高水压隧道主要依靠注浆圈来调节渗水量及衬砌水压力不同,新型限排方案可采用注浆圈+排水板多级调控方法,方案设计更加灵活,其中注浆圈占主导作用;3)注浆圈对降低隧道渗水量及衬砌外水压力均有利,其中渗透系数参数最为重要;4)仅当注浆圈渗透系数得到保障时,才存在合理的排水板间距使衬砌水压力与隧道渗水量控制在合理范围内.
Abstract
To mitigate water leakage problems in high-pressure tunnels and lower the costs associated with remediation,a novel limited drainage approach is proposed,utilizing a double-bonded sprayed waterproofing membrane.This approach comprises three components:grouting circle,double-bonded waterproof drainage system,and waterproof lining.The water pressure distribution characteristics of this novel limited drainage method are elucidated through numerical calculations,demonstrating its efficacy.Additionally,an analysis is conducted to assess the impact of various grouting circle and drainage sheet parameters on tunnel water inflow and lining water pressure.This analysis presents a design methodology for a multistage limited drainage scheme for high-pressure tunnels.The findings indicate that the novel limited drainage scheme can effectively reduce secondary lining water pressure to an acceptable level by adjusting the grouting circle and drainage sheet parameters.Unlike conventional high-pressure tunnel designs that predominantly rely on grouting circles for regulating seepage and lining water pressure,the proposed drainage-limiting scheme employs a multistage control approach involving both grouting circles and drainage sheets,offering enhanced flexibility in scheme design,with the grouting circle assuming a pivotal role.The grouting circle proves advantageous in minimizing tunnel seepage and external water pressure on the lining,with particular emphasis on the permeability coefficient parameter.Ensuring an appropriate permeability coefficient for the grouting circle allows for establishing reasonable spacing between drainage sheets,effectively managing lining water pressure and tunnel seepage within acceptable limits.These research outcomes can serve as valuable guidance for the design of drainage systems in high-pressure tunnels.
关键词
高水压隧道/双粘型防水/堵水限排/喷膜防水/渗流分析Key words
high water pressure tunnel/double-bonded waterproofing material/limited drainage/sprayed waterproofing membrane/seepage analysis引用本文复制引用
基金项目
中央高校基本科研业务费专项(502802002)
中央高校基本科研业务费专项中南大学项目(2023ZZTS0183)
出版年
2024
NETL
NSTL
维普
万方数据