CAJ | 학술논문

福建省地处中国东南沿海地区，花岗岩残积土分布较为集中。花岗岩残积土边坡存在较为发育的微裂隙结构面和一些软弱岩脉风化而成的软弱夹层，由于风化作用、降雨和地下水渗入等外界环境影响，裂隙中的填充物泥化和膨胀，结构面的抗剪强度迅速下降，形成软弱夹层，造成边坡失稳破坏。以某含软弱夹层花岗岩残积土边坡为例，建立有限元数值模型对该边坡的变形特征进行研究，发现直接开挖后沿软弱夹层将发生较大的相对滑动，最大水平位移达22 cm ，同时表明软弱夹层的存在不仅造成了边坡总体变形的增大，还决定了边坡失稳破坏时滑动面的位置。研究成果可为此类含软弱夹层的残积土边坡的设计、施工和治理提供借鉴和参考。
복건성지처중국동남연해지구，화강암잔적토분포교위집중。화강암잔적토변파존재교위발육적미렬극결구면화일사연약암맥풍화이성적연약협층，유우풍화작용、강우화지하수삼입등외계배경영향，렬극중적전충물니화화팽창，결구면적항전강도신속하강，형성연약협층，조성변파실은파배。이모함연약협층화강암잔적토변파위례，건립유한원수치모형대해변파적변형특정진행연구，발현직접개알후연연약협층장발생교대적상대활동，최대수평위이체22 cm ，동시표명연약협층적존재불부조성료변파총체변형적증대，환결정료변파실은파배시활동면적위치。연구성과가위차류함연약협층적잔적토변파적설계、시공화치리제공차감화삼고。
Fujian province is located in the southeast coastal area of China ,the granite residual soil is widely distributed . Granite residual soil slopes contain rock structure with relatively developed microcracks on its surface and weak interlay-ers .Due to weathering ,rainfalls and the infiltration of underground water ,the fillers in the cracks decompose and ex-pand which leads to a fast descend of shear strength of the structure surface and the formation of weak interlayers ,and eventually results in the instability and failure of the slope .Taking a granite residual soil slope with weak interlayers as an example ,the finite element numerical model was established to study the deformation characteristics of the slope .The research found that there was a large relative sliding movement of soil along the weak interlayers after the excavation ,with the maximum horizontal displacement of 22 cm .This indicates that the existence of weak interlayers not only causes the increase of the overall deformation of the slope ,but also determines the position of the sliding surface when the stability failure occurs .The research results can provide reference for the design ,construction and management of such residual soil slopes with weak interlayers .