基于界面黏附力盾构堵塞风险评判方法研究

方勇; 王宇博; 王凯; 钱聚强; 陈中天; 卓彬

doi:10.11779/CJGE20220634

基于界面黏附力盾构堵塞风险评判方法研究 English Version

1.
西南交通大学交通隧道工程教育部重点实验室, 四川成都 610031
2.
中铁十四局集团隧道工程有限公司, 山东济南 250101

基金项目:

国家自然科学基金项目 52078428

四川省杰出青年基金项目 2020JDJQ0032

详细信息

作者简介:
方勇(1981—)，男，博士，2007年于西南交通大学桥梁与隧道工程专业获博士学位，现任教授、博士生导师，主要从事隧道施工力学行为等方面的教学与研究工作。E-mail：fy980220@swjtu.cn

中图分类号: TU431
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出版历程
- 收稿日期: 2022-05-16
- 网络出版日期: 2023-09-06
- 刊出日期: 2023-08-31

Risk evaluation method for shield clogging based on interface adhesion force

1.
Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
2.
China Railway 14th Bureau Group Tunnel Engineering Co., Ltd., Jinan 250101, China

摘要

摘要: 为了准确预测盾构在高黏粒地层掘进时刀盘堵塞风险、提供刀盘泥饼防治依据，自行设计土体-金属界面拉拔试验装置与界面直剪试验装置，通过室内试验，分析了不同土样在不同稠度指数下法向黏附力与切向黏附力变化规律；基于试验结果提出了针对黏附力的五等级盾构堵塞风险分区图，并应用于强风化混合花岗岩渣土改良效果评估。研究表明：法向黏附力随稠度指数的增大先升高再降低，蒙脱土含量的提高会降低法向黏附力峰值线的稠度指数；全样品的摩擦角和切向黏附力在稠度指数小于0.6后稳定在低水平；稠度指数大于0.6时，纯黏土土样切向黏附力随着稠度指数的增加而增加，含砂土样切向附着力在稠度指数0.9附近有峰值，随后降低；针对黏附力盾构堵塞风险分区图可反映渣土改良过程中的盾构堵塞风险变化的路径，可对渣土改良效果进行评估。
- 盾构隧道 /
- 堵塞风险 /
- 室内试验 /
- 渣土改良 /
- 法向黏附力 /
- 切向黏附力
Abstract: In order to accurately predict the risk of cutterhead clogging and provide the basis for preventing and controlling cutterhead mud cake in the tunneling of high clay stratum, the laboratory tests are conducted by using the self-designed soil-metal interface pull-out test device and the improved direct shear test device. The variation rules of the normal and tangential adhesion forces of different soil samples under different consistency indexes are analyzed through the laboratory tests. Based on the test results, a five-grade shield clogging risk zone map for adhesion force is proposed and used to evaluate the conditioning effects of the strongly weathered mixed granite residue. The results show that the normal adhesion first increases and then decreases with the increase of the consistency index, and the increase of the montmorillonite content decreases the peak line consistency index of the normal adhesion. The friction angle and tangential adhesion of the whole samples remain at a low level when the consistency index is less than 0.6. When the consistency index is greater than 0.6, the tangential adhesion of the pure clay sample increases with the increase of the consistency index, and the tangential adhesion of the sandy soil sample has a peak value near the consistency index of 0.9, and then decreases. The shield clogging risk zone map for adhesion force can reflect the path of the change of shield clogging risk in the process of soil conditioning, and the effects of soil conditioning can be evaluated.
- shield tunnel /
- clogging risk /
- laboratory test /
- soil conditioning /
- normal adhesion /
- tangential adhesion

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图 1 界面黏附中水的作用模型

Figure 1. Model for water action in interface adhesion

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图 2 黏附力计算示意图

Figure 2. Schematic diagram of force calculation of adhesion

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图 3 法向黏附力示意图

Figure 3. Schematic diagram of normal adhesion force

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图 4 界面黏附拉拔试验装置

Figure 4. Interface adhesion pull-out test device

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图 5 切向黏附力示意图

Figure 5. Schematic diagram of tangential adhesion force

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图 6 直剪装置示意图

Figure 6. Schematic diagram of improved direct shear device

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图 7 不同稠度指数下的法向黏附力变化曲线

Figure 7. Relationship between normal adhesion and consistency index

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图 8 稠度指数0.9的高岭土直剪试验结果

Figure 8. Test data of improved direct shear test for kaolin soil with consistency index 0.9

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图 9 不同稠度指数下的切向黏附力变化曲线

Figure 9. Tangential adhesion-consistency index curve

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图 10 不同稠度指数下的摩擦角变化曲线

Figure 10. Relationship between friction angle and consistency index

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图 11 试验土样法、切向黏附力变化曲线

Figure 11. Change curves of normal and tangential adhesions of test soil samples

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图 12 盾构堵塞风险评估图

Figure 12. Risk assessment diagram of shield clogging

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图 13 法、切向黏附风险判断图

Figure 13. Risk judgment diagram of normal and tangential adhesions

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图 14 法、切向黏附风险判断

Figure 14. Risk judgment of normal and tangential adhesions

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图 15 基于黏附力的盾构堵塞风险评判图

Figure 15. Risk evaluation of shield clogging based on interface adhesion force

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图 16 含水率优化对盾构堵塞风险的影响

Figure 16. Effects of optimization of water content on risk of shield clogging

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图 17 堵塞风险预测图（Hollmann等^[20]）

Figure 17. Prediction chart of clogging risk (Hollmann et al^[20])

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图 18 注入分散剂对盾构堵塞风险的影响

Figure 18. Influences of dispersant injection on shield clogging risk

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图 19 堵塞风险预测图（Hollmann等^[20]）

Figure 19. Prediction chart of clogging risk (Hollmann et al^[20])

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图 20 注入泡沫对盾构堵塞风险的影响

Figure 20. Influences of foam injection on shield clogging risk

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表 1 试验土样参数

Table 1 Parameters of test soil samples

土样名称	塑限/%	液限/%
高岭土	23.90	46.17
蒙脱土	58.99	180.00
高蒙混合土（80%高+20%蒙）	41.13	106.90
砂黏混合土（75%混+25%砂）	30.33	83.96
砂黏混合土（50%混+50%砂）	26.43	65.43
砂黏混合土（25%混+75%砂）	19.42	46.00
强风化混合花岗岩	21.67	38.25

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