论文部分内容阅读
0 前言 在二十世纪七十年代初,国外首先提出碾压混凝土用于重力坝。近年来我国在铜街子、沙溪口、坑口、葛洲坝等工程进行了试验和推广,也取得了良好的经济效益。 碾压混凝土坝的结构型式,主要是由上游的防渗面板,下游的护坡及坝身的干贫混凝土三部分组成。其施工方法是采用起重机械吊运混凝土入缓冲料斗内,再用自卸汽车或带式运输机直接入仓卸料,推土机平料,振动碾碾压,取消纵缝的通仓薄层浇筑,碾压后或碾压前再用振动切缝机切割横缝,插入隔板的一整套施工方法。世界上几乎所有已建成或目前在建的碾压混凝土坝开始时,都计划设计成土坝或堆石坝,后来因为碾压混凝土坝型的预算费用低,决定改为碾压混凝土重力坝。本文主要是对原设计成砌石重力坝改用碾压混凝土坝施工的可行性分析。
0 Foreword In the early 1970s, the first overseas proposal for RCC was for gravity dam. In recent years, China has carried out experiments and popularized such projects as Tongjiezi, Shaxiou, Hang Hau and Gezhouba, and also achieved good economic benefits. RCC dam structure, mainly by the upstream anti-seepage panels, the downstream slope protection and dry lean concrete dam consists of three parts. The construction method is to use hoisting machinery to lift the concrete into the buffer hopper, and then use dump trucks or belt conveyors to direct warehousing and unloading, bulldozer leveling and vibration crushing and rolling, After rolling or rolling and then use the vibration cutting machine cutting transverse joints, insert a set of construction methods. At the beginning of almost all the RCC dams built or currently under construction in the world, earthwork or rockfill dams are planned to be designed. Later, because of the low budgetary cost of RCC dams, the decision was made to change to a RCC gravity dam. This paper mainly analyzes the feasibility of converting masonry gravity dam into RCC dam.