沉管隧道超高性能注浆新材料配制技术研究
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摘要
依据沉管隧道基础注浆材料超低强度、高流动以及水下不分散的设计要求,采用低胶凝材料用量、高水胶比、低水泥用量的方法配制满足要求的超高性能注浆新材料,通过分析胶凝材料用量、水胶比、水泥用量以及外加剂种类对注浆材料的工作性能、强度以及水下不分散性能的影响规律,优选出满足沉管隧道基础注浆材料各项性能指标的配合比,提高沉管后期的安全性和可靠性,降低其由于基础不均匀沉降导致的应力集中的风险。
Based on the design requirements for new material in immersed tube tunnel grouting,which were ultra low strength,high fluid and non dispersion under water,new grouting material with super high performance was prepared by using low cementitious material content,high water-binder and low cement content. Through analyzing the influences of cementitious material con-sumption,water-binder ratio,cement consumption and type of admixtures on workability,strength and non dispersion under water,the mix proportion of new material was optimized and satisfied with performance requirements in immersed tube tunnel grouting. The safety and reliability at the later stage of immersed tube was improved,the risk of the stress concentration caused by uneven settlement of the foundation is reduced.
Based on the design requirements for new material in immersed tube tunnel grouting,which were ultra low strength,high fluid and non dispersion under water,new grouting material with super high performance was prepared by using low cementitious material content,high water-binder and low cement content. Through analyzing the influences of cementitious material con-sumption,water-binder ratio,cement consumption and type of admixtures on workability,strength and non dispersion under water,the mix proportion of new material was optimized and satisfied with performance requirements in immersed tube tunnel grouting. The safety and reliability at the later stage of immersed tube was improved,the risk of the stress concentration caused by uneven settlement of the foundation is reduced.
引文
[1]宋光猛.沉管隧道基础注浆效果模型试验研究[D].上海:上海交通大学,2012.
[2]魏纲,裘慧杰,丁智等.海底沉管隧道施工引起的沉降实测与计算分析[J].现代隧道技术,2014,51(5):121-128.
[3]李源,沈永芳,黄醒春.海底沉管隧道基础注浆扩散规律的试验研究[J].地下空间与工程学报,2012,8(6):1244-1249,1266.
[4]黄燕基,唐奇端.泵送低强度等级混凝土的研究与应用[J].红水河,2003(1):69-72.
[5]刘娟.水下不分散混凝土抗分散剂的研究[D].长沙:湖南大学,2005.
[6]张勇林.水下不分散泡沫混凝土的抗分散性能研究[J].混凝土与水泥制品,2018(2):22-25.
[7]张鸣,周思通,王付鸣,等.水下不分散混凝土主要参数对性能的影响研究[J].混凝土,2017(8):140-144,155.
[8]郭自利,周鼎,裴正南.水下浇筑混凝土用抗分散剂试验研究[J].混凝土,2017(4):122-125.
[9]王进京.水下不分散混凝土性能研究[D].大连:大连交通大学,2015.蒉
[2]魏纲,裘慧杰,丁智等.海底沉管隧道施工引起的沉降实测与计算分析[J].现代隧道技术,2014,51(5):121-128.
[3]李源,沈永芳,黄醒春.海底沉管隧道基础注浆扩散规律的试验研究[J].地下空间与工程学报,2012,8(6):1244-1249,1266.
[4]黄燕基,唐奇端.泵送低强度等级混凝土的研究与应用[J].红水河,2003(1):69-72.
[5]刘娟.水下不分散混凝土抗分散剂的研究[D].长沙:湖南大学,2005.
[6]张勇林.水下不分散泡沫混凝土的抗分散性能研究[J].混凝土与水泥制品,2018(2):22-25.
[7]张鸣,周思通,王付鸣,等.水下不分散混凝土主要参数对性能的影响研究[J].混凝土,2017(8):140-144,155.
[8]郭自利,周鼎,裴正南.水下浇筑混凝土用抗分散剂试验研究[J].混凝土,2017(4):122-125.
[9]王进京.水下不分散混凝土性能研究[D].大连:大连交通大学,2015.蒉