CAJ | 학술논문

介绍了岩土体中渗流场与应力场的耦合作用机理,选取某基坑边坡工程中的一个典型剖面,采用FLAC3D 软件建立计算模型,对比分析渗流-应力耦合与不耦合两种工况下的边坡稳定性。结果表明,在渗流场与应力场不耦合或耦合作用下,边坡的位移最大值分别为10.67 cm 和9.85 cm,水平应力最大值分别为0.099 MPa 和0.276 MPa,安全系数分别为1.5和1.1。渗流场与应力场的耦合对边坡稳定性的影响效果明显,使边坡安全系数降低了约26.7%,因此地下水对边坡的作用不能简单以孔隙水压力代替,考虑渗流场与应力场的耦合效应更符合实际。
개소료암토체중삼류장여응력장적우합작용궤리,선취모기갱변파공정중적일개전형부면,채용FLAC3D 연건건립계산모형,대비분석삼류-응력우합여불우합량충공황하적변파은정성。결과표명,재삼류장여응력장불우합혹우합작용하,변파적위이최대치분별위10.67 cm 화9.85 cm,수평응력최대치분별위0.099 MPa 화0.276 MPa,안전계수분별위1.5화1.1。삼류장여응력장적우합대변파은정성적영향효과명현,사변파안전계수강저료약26.7%,인차지하수대변파적작용불능간단이공극수압력대체,고필삼류장여응력장적우합효응경부합실제。
This paper introduces the coupling mechanism between seepage field and stress filed in the rock and soil,chooses the typical profile of a foundation pit slope,uses FLAC3D software to establish the calculation model of the slope,and contrastively analyzes the slope stability under seepage-stress coupling and non-coupling conditions.Results show that,in the absence or presence of the coupling action between seepage field and stress field,the maximum displacements of the slope are 10.67 cm and 9.85 cm,respectively;the maximum horizontal stresses are 0.099 MPa and 0.276 MPa,respec-tively;and safety coefficients of the slope are 1.5 and 1.1,respectively.The effect of seepage-stress coupling action on slope stability is obvious,and safety factor of the slope decreases by almost 26.7%under the coupling condition.Therefore the influence of groundwater on slope cannot simply be re-placed by pore water pressure,and it’s more practical to consider the coupling between seepage field and stress field.