盾构隧道用聚合物双液浆性能及水化机理研究

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (8): 2897-2904.

盾构隧道用聚合物双液浆性能及水化机理研究

张书豪¹, 靳利安², 李宗奇², 申路¹, 崔圣爱¹

1.西南交通大学土木工程学院,成都 610031;
2.中电建成都建设投资有限公司,成都 610212

收稿日期:2023-12-28 修订日期:2024-02-06 出版日期:2024-08-15 发布日期:2024-08-12
通信作者: 崔圣爱,博士,教授。E-mail:shengai_cui@126.com
作者简介:张书豪(1998—),男,硕士研究生。主要从事隧道同步注浆材料和中盾注泥材料的研究。E-mail:357154715@qq.com
基金资助:
国家自然科学基金(52278277)

Performance and Hydration Mechanism of Polymer Double Slurry for Shield Tunnel

ZHANG Shuhao¹, JIN Li’an², LI Zongqi², SHEN Lu¹, CUI Sheng’ai¹

1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Chengdu Construction Investment Co., Ltd., China Power Construction Corporation, Chengdu 610212, China

Received:2023-12-28 Revised:2024-02-06 Online:2024-08-15 Published:2024-08-12

摘要/Abstract

摘要： 为了解决盾构隧道施工过程中注浆浆液流失大、稳定性差等问题,选用聚丙烯酰胺(PAM)、丁苯乳液(SBR)及羧甲基纤维素钠(CMC-Na)三种聚合物为原材料,研制了盾构隧道用聚合物双液浆注浆材料。对聚合物双液浆的基本性能和抗水分散性进行测定,同时结合CT测试和水化热测试,分析了不同种类聚合物双液浆的孔隙结构和水化机理。结果表明: 0.5%(质量分数)PAM的早期缓凝效果最明显,抗水分散性最优,CMC-Na具有提升后期强度增长速率的作用;聚合物的掺入会增大孔隙尺寸,扩大孔径分布范围,减少孔的数量; SBR对C₃A的溶解反应有显著影响,CMC-Na对水化加速阶段C-S-H的生成起控制作用。

关键词: 盾构隧道, 聚合物, 注浆材料, CT测试, 孔隙结构, 水化热, 水化机理

Abstract: In order to solve the problems of large loss and poor stability of grouting slurry during shield tunnel construction, three polymers of polyacrylamide (PAM), styrene-butadiene latex (SBR) and sodium carboxymethyl cellulose (CMC-Na) were selected as raw materials to develop polymer double slurry grouting material for shield tunnel. The basic properties and water dispersion resistance of polymer double slurry were measured. Combined with CT test and hydration heat test, the pore structure and hydration mechanism of different kinds of polymer double slurry were analyzed. The results show that the early retarding effect of 0.5% (mass fraction) PAM is the most obvious, and the water dispersion resistance is the best. CMC-Na has the effect of increasing the strength growth rate in later stage. The incorporation of polymer increases the pore size, expands the pore size distribution range, and reduces the number of pores. SBR has a significant effect on the dissolution reaction of C₃A, while CMC-Na plays a controlling role in the formation of C-S-H in accelerated hydration stage.

Key words: shield tunnel, polymer, grouting material, CT test, pore structure, hydration heat, hydration mechanism

中图分类号:

TU502

张书豪, 靳利安, 李宗奇, 申路, 崔圣爱. 盾构隧道用聚合物双液浆性能及水化机理研究[J]. 硅酸盐通报, 2024, 43(8): 2897-2904.

ZHANG Shuhao, JIN Li’an, LI Zongqi, SHEN Lu, CUI Sheng’ai. Performance and Hydration Mechanism of Polymer Double Slurry for Shield Tunnel[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(8): 2897-2904.

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