王凯¹, 李术才¹, 杨磊¹, 张庆松¹, 李召峰¹, 袁敬强²
AuthorsHTML:王凯¹, 李术才¹, 杨磊¹, 张庆松¹, 李召峰¹, 袁敬强²
AuthorsListE:Wang Kai¹, Li Shucai¹, Yang Lei¹, Zhang Qingsong¹, Li Zhaofeng¹, Yuan Jingqiang²
AuthorsHTMLE:Wang Kai¹, Li Shucai¹, Yang Lei¹, Zhang Qingsong¹, Li Zhaofeng¹, Yuan Jingqiang²
Unit:1. 山东大学岩土与结构工程研究中心，济南 250061；2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071
Unit_EngLish:1．Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China
2．State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan 430071, China
Abstract_Chinese:针对全风化花岗岩自稳能力差、遇水极易软化崩解等特点, 依托广西均昌隧道帷幕注浆灾害治理工程, 设计全风化花岗岩注浆模拟试验, 通过改变注浆压力, 对被注介质单轴抗压强度、抗剪强度、渗透系数、崩解率等参数进行测定, 研究注浆对全风化花岗岩地层强度特性和水理特性的影响机制．试验结果表明：全风化花岗岩地层中, 注浆以劈裂模式为主; 随着注浆压力的提高, 主浆脉扩展厚度不断提高, 被注介质的劈裂区(含浆脉)及压密区(不含浆脉)的单轴抗压强度和抗剪强度均显著增长; 在注浆压力为2.0 MPa时, 劈裂区抗压强度提高了152.4% , 抗剪强度(
)提高了348.6% , 压密区抗压强度提升71.4% , 抗剪强度(
)提升了149.6% ; 注浆加固后被注介质渗透系数大幅降低, 水稳定性显著提高．
Abstract_English:Completely decomposed granite has the characteristics of poor self-stability and strong disintegration with the influence of water. To study the physico-mechanical properties of completely decomposed granite，a grouting simulation experiment was designed based on the curtain grouting engineering of Junchang tunnel in Guangxi province. In this experiment，the uniaxial compressive strength，shear strength，permeability coefficient and rate of disintegration of the medium under different grouting pressures were obtained to investigate the influence mechanism of grouting on the strength and hydraulic characteristics of completely decomposed granite. The results showed that fracturing grouting was the dominating mode of completely decomposed granite stratum; with the increase of grouting pressure，the thickness of main slurry vein increased constantly，and the uniaxial compressive strength and shear strength in fracturing grouting area(with slurry vein)and compaction grouting area(without slurry vein)rose remarkably. Additionally，as the grouting pressure reached 2.0 MPa，the uniaxial compressive strength of fracturing grouting area increased by 152.4% ，and the shear strength(
)increased by 348.6% ; the compressive strength of compaction grouting area increased by 71.4% ，and the shear strength(
)increased by 149.6% . The osmotic coefficient of grouted medium declined sharply，while the water stability increased remarkably.
Keyword_Chinese:全风化花岗岩; 注浆模拟试验; 注浆压力; 水稳定性; 注浆效果
Keywords_English:completely decomposed granite; grouting simulation experiment; grouting pressure; water stability; grouting effect

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