摘要
“全孔护壁、孔底灌注”法和“孔底注浆、全孔灌注”法是劈裂式灌浆的两种施工方法。由于施工方法的不同，泥浆运动的机理也不同，因而灌浆效果亦存在差异。采用前者方法施工可在坝体内形成由多条上下较均匀，分布连续的主浆脉组成的防渗帷幕带，起始劈裂点可人为控制。而后者形成坝体内中上部宽、下部窄的防渗帷幕体，起始劈裂点是随机的。采用“全孔护壁，孔底灌注”劈裂式灌浆技术对水库均质土坝渗漏问题进行处理，经开挖竖井检查，发现沿坝轴线附近形成上下均匀、连续的由６～７条主浆脉组成的防渗帷幕带。这与传统的“孔底注浆、全孔灌注”劈裂式灌浆方法形成防渗帷幕有显著不同。
There are many landslide masses around Three Gorges reservoir.Some of them exist before the reservoir impoundment and others are likely to act after the reservoir impoundment.In resettlement planning,problems on landslide masses should be carefully approached.Some landslide masses should be possibly averted and some can be utilized after strengthening in order to ensure a long time safety of resettlement area and utilize as much land of the reservoir area as possible.At present there are two trends of thought obout landslide masses needing to be corrected:the first one considers all landslide masses to be very dangerous and dare not use them to resettle relocatees,resulting in a shortage of land for resettlement project;the second one is to resettle relocatees in landslide area without any investigation,and once some changes arise in landslide mass,there is no measure to treat these situations,resulting in implementing a second resettlement in a flurry or leading to serious losses of lives and properties.Some successful experiences in treatment of landslide masses in recent years are presented in this paper.These experiences are supervision at fixed point and dynamic treatment.
出处
《人民长江》
北大核心
1999年第4期12-13,共2页
Yangtze River
关键词
灌浆工艺
灌浆效果
劈裂灌浆
大坝
水库
Migration arrangement Rock deformation Landslide Slide monitoring Sanxia Multipurpose Project
