CAJ | 학술논문

针对在一定水深下，面膜周边锚固处将形成“面膜夹具”进而产生影响面膜安全的夹具效应这一高面膜堆石坝研究和设计中首先需面对的关键技术问题，在材料试验和工程结构分析的基础上分析了形成夹具效应的机制，提出了产生夹具效应的必要条件和充分条件；模拟工程实际设计了面膜堆石坝周边锚固处夹具效应的室内结构模型试验，初步试验验证了按常规设计的传统膜铺设方式难以避免夹具效应的产生；在充分考虑实际施工工艺的基础上，以夹具效应产生的充分条件为切入点提出了消除夹具效应的设计思路为：在保证面膜免受损伤条件下增大“面膜夹具”间的初始标距，在坝体位移过程中设法使“面膜夹具”间面膜的有效几何变形取代材料变形；设计方法是将铺膜线平面设置高于锚固线平面，坝面位移后使铺膜线回到锚固线附近。
침대재일정수심하，면막주변묘고처장형성“면막협구”진이산생영향면막안전적협구효응저일고면막퇴석패연구화설계중수선수면대적관건기술문제，재재료시험화공정결구분석적기출상분석료형성협구효응적궤제，제출료산생협구효응적필요조건화충분조건；모의공정실제설계료면막퇴석패주변묘고처협구효응적실내결구모형시험，초보시험험증료안상규설계적전통막포설방식난이피면협구효응적산생；재충분고필실제시공공예적기출상，이협구효응산생적충분조건위절입점제출료소제협구효응적설계사로위：재보증면막면수손상조건하증대“면막협구”간적초시표거，재패체위이과정중설법사“면막협구”간면막적유효궤하변형취대재료변형；설계방법시장포막선평면설치고우묘고선평면，패면위이후사포막선회도묘고선부근。
A key technology issue firstly faced in studding and designing membrane faced rockfill dam ( MFRD) is that at perimeter of surface membrane, under definite depth of water, “anchorages of surface membrane“ are formed and then“anchoring influences“, affecting the safety of faced membrane, are produced. Based on material test and structure analysis, the forming mechanism of anchoring influence is analyzed and the necessary and sufficient conditions of anchoring influence formed are proposed. After designing structure experiment model of anchoring influence at perimeter of surface membrane on MFRD, it is proved by preliminary experiment that anchoring influence cannot be avoid if surface membrane is placed on dam according to traditional way. Based on a full consideration of construction technology and sufficient conditions of anchoring influence formed, the idea of eliminating anchoring influence under the condition of no damage of surface, one should increasing the initial gauge length between anchorages of surface membrane in order to substitute geometry deformation for the material deformation between anchorages of surface membrane during dam displacement. The approach of design is that the paving line of surface membrane is high to anchoring line, thus the paving line of surface membrane goes back to anchoring line after displacement of the dam surface.