地层注浆附加土压力形成及影响因素单元体试验研究

doi:10.13722/j.cnki.jrme.2023.0082

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摘要地层注浆已成为既有隧道变形恢复的重要技术，为探明浆液扩散及注浆附加土压力的形成机制与影响因素，设计地层注浆单元体试验，在砂土、橡胶粒地层中分别注入不同含水量的浆液，采用模型试验的方法探究注浆过程中浆液的扩散模式及附加土压力的形成规律，试验结果表明：(1) 相比于低含水量浆液，高含水量浆液在砂土地层内易发生劈裂扩散；(2) 高含水量浆液在橡胶粒地层中易发生渗透扩散，而低含水量浆液在橡胶粒地层中主要以劈裂扩散为主；(3) 低含水量浆液在砂土地层的浆脉厚度大于橡胶粒地层的浆脉厚度，注浆导致的附加土压力也更大；(4) 注浆材料与地层土体的物理力学性能共同决定了浆液的扩散发展过程，进而影响注浆附加土压力的大小。

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	黄大维1
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	罗仲睿1
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	罗文俊1
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	朱碧堂1
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	刘家璇1
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	赵梽錡1
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关键词 ：隧道工程, 盾构隧道, 恢复注浆, 附加土压力, 单元体, 模型试验

Abstract：Soil grouting has become an important technology for deformation recovery of existing tunnels，in order to explore the formation mechanism and influencing factors of slurry diffusion and additional soil pressure during grouting，a unit test for ground grouting has been designed.The grout with different water contents has been injected into sandy soil and rubber particle formations respectively，to explore the diffusion mode of slurry and the formation law of additional soil pressure during the grouting process using model experiments.The test results are as follows. (1) Pore water pressure dissipation will occur after the grout is injected into the formation soil，and the larger the soil porosity is，the faster the water pressure dissipation rate will be. (2) During grouting，the diffusion mode of grout in the stratum soil is closely related to the soil porosity and water content of grout. (3) When the slurry is still，the static water pressure will dissipate，the slurry volume will gradually reduce，and the additional earth pressure value will also gradually decrease. (4) During deformation recovery grouting，the change of additional earth pressure shall be monitored in real time，and multi-point grouting technology shall be adopted when injecting grout with low water content into sandy soil layer.

Key words： tunnelling engineering shield tunnel resume grouting additional earth pressure unit body model test

引用本文:

黄大维1，2，罗仲睿1，2，罗文俊1，2，朱碧堂1，2，刘家璇1，2，赵梽錡1，2. 地层注浆附加土压力形成及影响因素单元体试验研究[J]. 岩石力学与工程学报, 2024, 43(S1): 3520-3529.
HUANG Dawei1，2，LUO Zhongrui1，2，LUO Wenjun1，2，ZHU Bitang1，2，LIU Jiaxuan1，2，ZHAO Zhiqi1，2. Unit test study on formation and influence factors of additional earth pressure during formation grouting. , 2024, 43(S1): 3520-3529.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0082 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/IS1/3520

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