CAJ | 학술논문

以洞松水电站引水隧洞为工程背景，采用 FLAC 有限差分软件对固结灌浆前后引水隧洞衬砌的力学行为进行分析。分析认为：固结灌浆可以有效加固岩体，封闭隧洞周边岩体裂隙，改善衬砌受力状态，提高衬砌抵抗变形和破坏的能力。但是，固结灌浆在施作时会对衬砌产生很大的附加荷载，计算显示固结灌浆造成衬砌最大压应力增大了30％左右，导致了衬砌的二次变形。如果固结灌浆施作不当压应力可能更大，甚至会压垮衬砌造成衬砌的严重破坏。通过选取不同的施工工法可以有效减小固结灌浆在施作时对衬砌产生的附加荷载，分段固结灌浆对衬砌产生的附加荷载要小于全孔一次灌浆时对衬砌所产生的附加荷载。
이동송수전참인수수동위공정배경，채용 FLAC 유한차분연건대고결관장전후인수수동츤체적역학행위진행분석。분석인위：고결관장가이유효가고암체，봉폐수동주변암체렬극，개선츤체수력상태，제고츤체저항변형화파배적능력。단시，고결관장재시작시회대츤체산생흔대적부가하재，계산현시고결관장조성츤체최대압응력증대료30％좌우，도치료츤체적이차변형。여과고결관장시작불당압응력가능경대，심지회압과츤체조성츤체적엄중파배。통과선취불동적시공공법가이유효감소고결관장재시작시대츤체산생적부가하재，분단고결관장대츤체산생적부가하재요소우전공일차관장시대츤체소산생적부가하재。
Based on the engineering background and finite element simulation about the diversion tunnel of Dongsong Hy -dropower Station ,the mechanical behavior analyses about the diversion tunnel lining between and after the consolidation grouting are conducted respectively .The results present that the consolidation grouting can reinforce the rock effectively , modify the crack propagation around the tunnel ,improve the stress condition about the lining ,and enhance the anti-de-formation and anti-fracture ability of the lining .However ,the consolidation grouting will cause the significant additional load in the lining ,the simulating results show that the consolidation grouting has caused 30% augment about the maxi-mum stress in the lining ,and in turn caused the secondary deformation ,thus ,the inappropriate consolidation will cause the increasing of compressive stress ,even the possibility of the thorough damage of the lining .Finally ,through different construction meghods ,the additional stress of the lining in consolidation grouting will be decreased effectively ,thus the additional stress in segment consolidation grouting will be smaller than that of full hole grouting at a time .