CAJ | 학술논문

全面介绍了某水工隧洞软弱围岩松弛变形测试、围岩表面收敛变形监测及对岩体内部岩石位移变化情况监测所采用的技术方法，通过现场测试取得了较为翔实的资料，经分析围岩波速及其松弛厚度变化特征、围岩变形量、变化过程及持续时间，得出该区隧洞埋深在300 m以下的洞段，Ⅲ、Ⅳ1、Ⅳ2类围岩松动圈厚度一般在1 m左右，围岩的变形量主要发生在开挖后的40～50 h以内，且初期变形速度较快。因此，隧洞支护应在围岩未发生充分变形的情况下进行，分析认为该区隧洞Ⅳ2、Ⅴ类围岩支护时间宜在开挖后数小时内完成，而Ⅳ1类围岩可在开挖后数小时至十几个小时内完成，最长不宜超过1d。通过探讨隧洞及高压管道围岩变形规律及发展趋势，预测围岩稳定状态，为修正原设计支护类型和参数以及合理选择一次支护时机、优化衬砌类型等提供科学依据。
전면개소료모수공수동연약위암송이변형측시、위암표면수렴변형감측급대암체내부암석위이변화정황감측소채용적기술방법，통과현장측시취득료교위상실적자료，경분석위암파속급기송이후도변화특정、위암변형량、변화과정급지속시간，득출해구수동매심재300 m이하적동단，Ⅲ、Ⅳ1、Ⅳ2류위암송동권후도일반재1 m좌우，위암적변형량주요발생재개알후적40～50 h이내，차초기변형속도교쾌。인차，수동지호응재위암미발생충분변형적정황하진행，분석인위해구수동Ⅳ2、Ⅴ류위암지호시간의재개알후수소시내완성，이Ⅳ1류위암가재개알후수소시지십궤개소시내완성，최장불의초과1d。통과탐토수동급고압관도위암변형규률급발전추세，예측위암은정상태，위수정원설계지호류형화삼수이급합리선택일차지호시궤、우화츤체류형등제공과학의거。
The technique and methods applied for determination of weak rock deformational behaviors in a hydraulic tunneling work were elaborated,including testing of relaxation extent,monitoring of surface convergence and internal relative displacement,through which a large data were obtained for analysis of changes of wave velocity and loosen degree,deformation amount,displacement process and lasting time, based on which it was found that for tunneling section with more than 300 m thick cover,the relaxation thickness of ClassⅢ,Ⅳ1 andⅣ2 was generally about 1m and deformation of surrounding rocks was dominantly occurred within 40 to 50 hours after excavation,especially in the first several hours. Thus,it is recommended that the support system should be installed before the rock mass is fully deformed,such as ClassⅣ2 andⅤrock mass should be supported within several hours after excavation and ClassⅣ1 within several hours to a dozen hours,at least within one day after excavation. In this paper the stability of heading rock mass is estimated by analysis of deformation characteristic and developing trends so as to provide to scientific basis for updating the original support design and parameters,selection of supporting time and optimizing lining type.