CAJ | 학술논문

通过分析成兰铁路杨家坪隧道1号横洞工区的地层岩性、地质构造、地应力场、工程地质条件及工程设置、施工组织顺序等的基础上，研究1号横洞工区大变形产生的成因机制。结果表明：杨家坪隧道1号横洞工区大变形的产生是各种影响因素共同作用的结果；复杂的地质构造及高地应力条件和软弱破碎的地层岩性条件为其大变形客观成因，而岩层结构面与洞轴线的不利组合、小间距隧道结构和不合理的施组顺序及左右线不对等的支护措施等不利条件为其主观成因。与大变形的主客观成因相对应，其力学机制主要呈现为应力扩容型的构造应力机制和结构变形型的结构面型机制的混合机制。
통과분석성란철로양가평수도1호횡동공구적지층암성、지질구조、지응력장、공정지질조건급공정설치、시공조직순서등적기출상，연구1호횡동공구대변형산생적성인궤제。결과표명：양가평수도1호횡동공구대변형적산생시각충영향인소공동작용적결과；복잡적지질구조급고지응력조건화연약파쇄적지층암성조건위기대변형객관성인，이암층결구면여동축선적불리조합、소간거수도결구화불합리적시조순서급좌우선불대등적지호조시등불리조건위기주관성인。여대변형적주객관성인상대응，기역학궤제주요정현위응력확용형적구조응력궤제화결구변형형적결구면형궤제적혼합궤제。
Based on the research of strata, lithology, geological structure, geostress, engineering geology, engineering design and construction organization plan, the paper analyzes the cause and mechanism of larger deformation in No. 1 cross-tunnel area of Yangjiaping tunnel on Chengdu-Lanzhou railway. The results indicate that the larger deformation in No. 1 cross-tunnel area of Yangjiaping tunnel is the end product of all such objective factors as the intricate geological structure, high geostress, weak and broken lithology and such subjective factors as adverse combination of rock structure surface along the tunnel, short distance between double track tunnels, unfavorable construction organization plan, different supporting measures between left and right lines of double track tunnel. Due to the objective and subjective factors of larger deformation in No. 1 cross-tunnel area of Yangjiaping tunnel, a mixed mechanism is presented of geotectonic stress expansion and structural surface deformation.