高压灌浆抬动监测技术研究  

The Technical Study of Monitoring of High Pressure Grouting-caused Uplift

作　　者：熊德全[1] 赵正洪[1] 王昆[1] 

机构地区：[1]中国水电顾问集团昆明勘测设计研究院勘察分院,云南昆明650041

出　　处：《云南水力发电》2010年第2期35-41,共7页Yunnan Water Power

摘　　要：水电大坝及枢纽防渗处理的基本方法之一为灌注水泥浆液，随着灌浆机具及工艺的日趋成熟和完备，灌浆的压力因工程的规模及地质条件复杂等原因而大幅提高，国内相关大型水电工程的最大灌浆压力已达到5—7MPa，较大的灌浆压力一方面有利防渗帷幕体的结实耐久，另一方面对岩土层会引起次生的劈裂破坏，以及对水工结构物产生的抬动变形等危害，因此灌浆抬动监测不容忽视。一般灌浆工程主要采用单点法观测30m以上的地表层灌浆抬动变形，本文以洪家渡水电站面板堆石坝趾板高压灌浆试验的分层多点监测岩层变形为主，主要介绍抬动监测方法及数据分析研究的相关资料，与水电基础加固处理工程建设同行探讨。Cement grout injection is one of the basic seepage control treatment methods in construction of dams and hydraulic structures of hydropower projects. With ripening and perfecting of grouting machines and tools as well as technology day by day, the grouting pressure increases by a large margin because of both scale and geological conditions of a hydropower project becoming larger and more complicated. Max. grouting pressure has reached 5 7 MPa in construction of the relevant large hydropower projects in China. The high grouting pressure enables impervious curtains to be solid and durable on the one hand and causes secondary splitting damage to rock and soil forrnations on the other hand. Further, the high grouting pressure would cause uplift deformation of hydraulic structures. It is therefore necessary to monitor groutingcaused uplift of a hydraulic structure. In general, the single point method is used to monitor over 30m thick ground surface layer grouting-caused uplift deformation in grouting works. By taking the concrete face rock - fill dam plinth high pressure grouting test of Hongjiadu hydropower project as an example for monitoring of rock formation deforma- tion using multi - point imtrumentation arranged in layers, this paper introduces the monitoring method of grouting - caused uplift and relevant information concerning data analysis and study for discussion with the coUeagues engaged in foundation consolidation treatment of hydropower projects.

关 键 词：水电站 灌浆试验 高压力 抬动变形监测 成果分析 

分 类 号：TV698.11[水利工程—水利水电工程]