摘要
某促淤圈围工程的地基基本上为松散的粉砂性土或软弱黏性土,强度较低,抗冲刷能力弱,当进行围堤及分隔堤施工时,地基土的应力状态和滩面的水沙条件改变,使地基产生变形,水流冲於发生变化,影响工程安全稳定。为此,在工程施工期间利用GPS配合测深仪对水下地形进行动态监测,通过GPS-RTK配合ADCP(声学多普勒流速剖面仪)对龙口流速、流向等进行动态监测,采用水准仪和全站仪对围堤及分隔堤堤身沉降、位移进行动态监测,并对监测数据进行分析,及时掌握沿围堤及分隔堤两侧滩面的冲於变化、龙口水文条件、围堤和分隔堤的堤身沉降及位移等情况,为工程施工的动态管理提供依据,从而提高工程质量、保证工程进度、降低成本。
The ground foundation of a deposition promotion and enclosure engineering is essentially constructed by loose and sandy soil or weak cohesive soil which has the disadvantage of low intensity and weak anti -scouring ability . When causeway and separation dike are under construction , the foundation soil stress state and the conditions of water and sediment will change , which will easily cause the subsidence of ground foundation and the changes of water scour-silt , and result in project instability . Therefore , during the project construction , make use of GPS and detector to implement dynamic monitoring of the underwater topography , through the cooperation of GPS-RTK and ADCP , the dynamic monitoring of flow speed and direction is realized . Adopt water level and total station to monitor the subsidence and displacement of causeway and separation dike dynamically , and analyze the monitoring data to master the two side beach surface change of the causeway and separation dike , longkou hydrological conditions , the subsidence and displacement of causeway and separation dike and so on in time , which will provide basis for dynamic project construction management , so as to improve the project quality , ensure the progress and reduce the cost .
出处
《浙江水利科技》
2015年第2期76-79,共4页
Zhejiang Hydrotechnics
关键词
促淤圈围
水下地形
流速和流向
沉降
位移
动态监测
数据分析
deposition promotion and enclosure
underwater topography
flow speed and direction
subsidence
displacement
dynamic monitoring
data analysis
作者简介
奚立平（1969-），男，副教授，硕士，主要从事水工安全监测、养护修理等教学与研究。E—mail：xilp@263．net
