摘要
拉萨河特大桥河床地质为砂夹卵石层,其透水性极强。承台采用混凝土围堰加封底施工方案。在封底混凝土抽水时发现水封混凝土在个别桩周围存在漏水现象,介绍采用在原封底混凝土以下压浆固结砂卵石层以增加封底混凝土厚度以及加强桩周混凝土强度的堵漏技术。
The riverbed where Lhasa River Bridge is located is highly permeable owing to the geologic condition that the riverbed is of sand sandwiched with pebbles. For construction of the pile caps of the Bridge, the scheme of concrete cofferdam plus bottom sealing concrete inside was applied. At the time the water was pumped out after the sealing tremie concrete was cast, water leaking problem was found around a few piles at the concrete. This paper presents the construction techniques for grouting mortar under the original sealing concrete for the purpose of binding the sand and pebble sandwich, increasing the thickness of the sealing concrete and strengthening the concrete around the piles.
出处
《桥梁建设》
EI
CSCD
北大核心
2005年第5期49-50,共2页
Bridge Construction
关键词
围堰
堵漏
桥梁施工
施工方法
cofferdam
leaking stoppage
bridge construction
construction method
