溃口修复段堤防局部沉陷成因分析  

Analysis of embankment partial subsidence in repair section after broken

作　　者：许冶佳 张鹏[2] 郭志扬[2] 

机构地区：[1]黑龙江省三江工程建设管理局,黑龙江哈尔滨150081 [2]河海大学水利水电学院,江苏南京210098

出　　处：《黑龙江水利》2017年第6期23-27,共5页

摘　　要：溃口堤防在抢险封堵中受各方面因素限制,可能存在薄弱环节,运行中往往会出现管涌、渗漏与边坡失稳等险情。为此,及时查明出险情况,做出成因诊断,对于评价堤防安全,采取相应措施意义重大。本文以某溃口修复段堤防为例,综合运用探地雷达、沉降观测等手段,对岸坡的局部沉陷成因做出了合理分析。即溃修段填筑以粗颗粒风化料为主,级配差,加之抢险施工碾压不密实,在高水位下易出现渗透变形引发的沉陷。今后类似溃决堤防堵口需改进填料、加强防渗措施。There might be some dangerous situation such as piping, leakage and slope instability etc, when the broken embankment has been repaired urgently. So it was important to figure out the exiting threatened situation and make genetic diagnosis timely, which can help to evaluate its safety index and take corresponding measures. In this paper, the rational reasons of partial subsidence was analyzed by taking comprehensive approaehes such as ground penetrating radar and observed settlement. The conclusion showed that the coarse particles weathered material which was filled with the broken dike has poor gradation and leakiness rolling craftwork. Therefore it was easy to appear the settlement caused by seepage deformation. It was necessary to take some measures to strengthen filling materials in similar situation.

关 键 词：堤防 隐患探测 沉降观测 成因分析 

分 类 号：TV871[水利工程—水利水电工程]