陡坡岩质河床上深水围堰水泥砂浆扩散试验研究被引量：1

Study on Diffusion Test of Cement Mortar for Deep-water Cofferdams on a Steep-rocky Riverbed

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摘要金寨县新建新桃大桥施工中,在陡坡岩质河床上进行深水围堰基础施工是一项重要且难度较大的工序。特别是在围堰工程中,深水水下施工复杂、不易控制且贯穿于整个施工组织设计,最突出的即是深水水下水泥砂浆灌注环节。为了有效确定水下水泥砂浆的凝结时间以及最优配合比,开展了水泥砂浆扩散的室内试验,以指导实际工程中水泥砂浆的灌注。室内试验安装根据现场施工,采用相似比关系进行确定。试验中,采用了不同的纵坡坡度以及不同的碎石层粗糙度以模拟实际工况,并开展了多组试验。最后对试验结果进行了分析和讨论。 Based on Xintao Bridge engineering in Jinzhai county. In this practical engineering,cofferdam foundation construction is a key segment. In the cofferdam engineering,deep water construction is a very difficult issue to be addressed in the whole process,and the grouting technique of cement mortar is a total operation underwater. For the purpose of determining the setting time of cement mortar underwater as well as an optimal mix proportion,an indoor experiment of cement mortar diffusion is carried out,which is aimed at inferring the grouting process in the practical engineering. The installed devices of the laboratory test are determined according to the similarity ratio. In this test,different gradients of longitudinal slopes and different kinds of thickness of gravel layer are taken into account,and some combinational tests are carried out. According to an analysis of the presented results,the practical construction can be guided.

作者戴良军朱大勇

机构地区安徽建工集团合肥工业大学土木与水利工程学院安徽土木工程结构与材料省级实验室

出处《施工技术》 CAS 北大核心 2016年第5期35-37,55,共4页 Construction Technology

关键词桥梁工程扩散试验水泥砂浆围堰灌注凝结时间配合比 bridges diffusion tests cement mortar cofferdams pouring setting time mix proportion

分类号 U448.22 [建筑科学—桥梁与隧道工程]

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1HALAMICKOVA P, DETWILER R J, BENTZ D P, et al. Water permeability and chloride ion diffusion in Portland cement mortars: relationship to sand content and critical pore diameter [ J ]. Cement and Concrete Research, 1995, 25 (4) : 790-802.
2BUENFELD N R, NEWMAN J B. Examination of three methods for studying ion diffusion in cement pastes, mortars and concrete [J]. Materials and Structures, 1987, 20( 1 ) : 3-10.
3JOHANNESSON B F. Prestudy on diffusion and transient condensation of water vapor in cement mortar [ J]. Cement and Concrete Research, 2002, 32(6): 955-962.
4GENTA G. Vibration of structures and machines: practical aspects[ M]. Springer Science & Business Media, 2012.
5MAINGUY M, TOGNAZZI C, TORRENTI J M, et al. Modelling of leaching in pure cement paste and mortar [ J]. Cement and Concrete Research, 2000, 30( 1 ): 83-90.
6MATH M, KERAN Z, KUNCA M, et al. Finite element simulation of the Siebel-Schwaigerer tensile test [J]. Engineering Review, 2006, 26(1/2) : 102-107.
7MI G, LI C, GAO Z, et al. Finite element analysis of welding residual stress of aluminum plates under different butt joint parameters[ J ]. Engineering Review, 2014, 34 (3) : 161-166.
8GARBALINSKA H. Measurement of the mass diffusivity in cement mortar: use of initial rates of water absorption [ J ]. International Journal of Heat and Mass Transfer, 2002, 45 (6) :1353-1357.