工程地质分层对深层搅拌防渗墙质量的影响  

Research on the Influence of Engineering Geological Soil Layers on Quality of Deep Mixing Anti-seepage Wall

作　　者：张羽[1] 张志虎[1] 周梦[1] 

机构地区：[1]华北水利水电大学,河南郑州450045

出　　处：《华北水利水电大学学报（自然科学版）》2014年第6期57-60,共4页Journal of North China University of Water Resources and Electric Power：Natural Science Edition

基　　金：国家自然科学基金资助项目(51039004;51079055);河南省创新型科技人才队伍建设工程资助项目

摘　　要：以往在设计、施工中常把深层搅拌防渗墙视为均质水泥土墙体,但在实际施工过程及试验检测中发现地质分层对防渗墙质量有很大的影响.以大同市文瀛湖水库防渗改造工程项目为依托,分析了其典型地质分层情况及深层搅拌防渗墙施工工艺参数,通过开挖检测和水泥土特性试验,研究了土层的分层情况对形成的水泥土墙体完整性、均匀性、强度及抗渗性能的影响.通过对现场施工过程的观察记录和试验数据进行分析,得出地质土层会直接通过土对水泥浆的吸收及对施工机械的影响使防渗墙的强度、抗渗性等呈现不均匀性,并提出不同土层条件下提高施工质量的相应措施.The deep mixing anti-seepage wall is often as a uniform cement-soil wall in the design and construction. But we found the geological layers had great influence on the quality of anti-seepage wall in the actual construction process and experimental testing. Based on the typical geological soil conditions of Wenyinghu Reservoir anti-seepage project in Datong, we analyzed the construction technology parameters of deep mixing anti-seepage wall in this article. By means of excavation detection and cement-soil characteristic experiment, we researched the influence of soil layers on the integrity, uniformity, strength as well as impermeability of the existing cement-soil wall. After observing and recording the construction process and analyzing the experimental data, we put forward that the geological soil layers directly impact on the absorptive capacity of the cement paste through the soil, and the influences of the geological soil layers on the construction machinery make the anti-seepage wall to present the nonuniform law in some performances, such as the strength, the impermeability, and so on. We also propose the measures to improve the construction quality under different soil layer conditions.

关 键 词：深层搅拌 水泥土 防渗墙 地质分层 施工质量 

分 类 号：TV223.4[水利工程—水工结构工程]