Quantitative Design Method for Grouting in Sand Layers: Practice in Qingdao Metro Line 2
Quantitative Design Method for Grouting in Sand Layers: Practice in Qingdao Metro Line 2
复制标题
砂层注浆定量设计方法——在青岛地铁2号线的实践
DOI：
10.3390/pr10050840
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发表时间：
2022-04
期刊：
影响因子：
3.5
通讯作者：
Lige Wang
中科院分区：
文献类型：
--
作者：
Zhipeng Li;Lianzhen Zhang;Dayong Sun;Qingsong Zhang;Deming Wang;Lige Wang
注浆是降低渗透性、改善砂层力学性能、防止灾难性的沙和水涌入的有效方法。科学的注浆设计方案是满足注浆加固要求的前提。由于目前灌浆设计缺乏理论依据，灌浆工程都是凭经验、盲目进行。提出了砂层注浆的定量设计方法。基于该方法，实现了注浆方式判断、注浆范围确定和注浆加固效果计算的定量设计。此外，针对裂缝-压实注浆模式，考虑浆液流动与砂层变形的耦合效应，提出了计算注浆过程的理论模型。同时提出了一种将灌浆体宏观性能与浆脉、压实砂、原状砂个体性能联系起来的加筋计算方法。为了验证该注浆设计方法的有效性，将其应用于青岛地铁2号线砂浆注浆工程中。该工程基于该设计方法完成了注浆方式的判断、注浆类型的选择和注浆参数的确定。通过多种检查方法来评估注浆设计的有效性，表明注浆作业后工程稳定性得到了保证。
Grouting is an effective method to reduce permeability and improve the mechanical performance of sand layers, preventing a disastrous inrush of sand and water. A scientific grouting design scheme is the premise for satisfying grouting reinforcement requirements. Due to a lack of theoretical basis for current grouting designs, grouting projects are conducted empirically and blindly. This paper presents a quantitative design method for grouting in sand layers. Based on this method, a quantitative design is realized for judgment of the grouting mode, determination of grouting range and calculation of grouting reinforcement effect. Moreover, for the fracture–compaction grouting mode, a theoretical model is proposed to calculate the grouting process, considering the coupling effect of grout flow and sand layer deformation. Meanwhile, a calculation method for reinforcement is put forward, which can connect macroscopic performance of the grouted body and individual performance of grout veins, compacted sand and undisturbed sand. In order to verify the efficiency of the grouting design method, it has been used in a sand grouting project in Qingdao Metro Line 2. In this project, judgment of the grouting mode, selection of grouting type and determination of grouting parameters have been completed based on the design method. Several inspection approaches have been performed to evaluate the effectiveness of the grouting design, showing that engineering stability was guaranteed after the grouting operation.
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影响因子：
5.3
作者：
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通讯作者：
Jisuk Yoon;C. E. Mohtar
DOI：
10.1002/nag.785
发表时间：
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影响因子：
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作者：
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