CAJ | 학술논문

荆竹屋基滑坡的滑动过程存在多种解体模式，为了研究该类顺层岩质滑坡的滑动模型，在对滑坡后滑体结构和地面破裂现象系统调查的基础上，根据解体特征对滑坡进行了分区，并通过建立的滑坡作用强度评价模型，探讨了滑坡滑距、运动解体模式和建筑物易损性等问题。研究结果表明：①前缘采石场的切坡使潜在不稳定的斜坡临空，抗滑力降低，诱发了中部浅层顺层软弱页岩层及后部风化接触带的整体滑动；②主滑体滑移距离约29．5 m，主滑方向为5°，滑体厚度约15 m；③受滑体风化层厚度变化和前地形条件限制，在整体滑动后分区解体现象明显。滑体上各区对建筑物易损性的作用强度从大到小依次为：前缘堆积区（Ⅵ）＞后缘拉槽破坏区（Ⅱ）＞中部推覆区（Ⅳ）和破碎区（Ⅶ）＞局部分块滑移区（Ⅴ）＞中部逆冲区（Ⅳ）＞顺层整体滑移区（Ⅲ1、Ⅲ2）＞后缘拉裂影响区（Ⅰ）。研究绘制出的滑坡解体破碎分区图，对分析滑坡风险分布规律具有参考价值。
형죽옥기활파적활동과정존재다충해체모식，위료연구해류순층암질활파적활동모형，재대활파후활체결구화지면파렬현상계통조사적기출상，근거해체특정대활파진행료분구，병통과건립적활파작용강도평개모형，탐토료활파활거、운동해체모식화건축물역손성등문제。연구결과표명：①전연채석장적절파사잠재불은정적사파림공，항활력강저，유발료중부천층순층연약혈암층급후부풍화접촉대적정체활동；②주활체활이거리약29．5 m，주활방향위5°，활체후도약15 m；③수활체풍화층후도변화화전지형조건한제，재정체활동후분구해체현상명현。활체상각구대건축물역손성적작용강도종대도소의차위：전연퇴적구（Ⅵ）＞후연랍조파배구（Ⅱ）＞중부추복구（Ⅳ）화파쇄구（Ⅶ）＞국부분괴활이구（Ⅴ）＞중부역충구（Ⅳ）＞순층정체활이구（Ⅲ1、Ⅲ2）＞후연랍렬영향구（Ⅰ）。연구회제출적활파해체파쇄분구도，대분석활파풍험분포규률구유삼고개치。
A large bedded landslide occurred in Sunjia Town,Wanzhou District of Chongqing.There were multiple disintegration modes in the sliding process.In order to study the slip model of such bedded rock landslide,the slip structure and ground rupture were investigated.Furthermore on this basis,the landslide was partitioned and the sliding distance,movement patterns and building’s vulnerability were analysed.Results reveal that 1 )potentially unstable slopes were made free by slope cutting of the leading edge of the quarry,and the anti-sliding force de-creased,which triggered the sliding of shallow bedded weak shale in the middle and weathered contact zone in the back;2)the primary slip body slid about 29.5m,the main slide direction was 5°and the thickness of slip body was about 1 5m;3)affected by the change of weathered layer thickness and the previous topographical conditions, the partitioned disintegration was obvious after the sliding.The intensity of each partition’s effect on building’s vulnerability can be ranged as:front accumulation zone (Ⅵ) >groove damaging zone in the back edge (Ⅱ) >central nappe zone (Ⅳ),crushing zone (Ⅶ) >local block sliding zone (Ⅴ) >central thrust zone (Ⅳ) >in-tegral sliding zone (Ⅲ1 ,Ⅲ2 )>affected zone in the back edge (Ⅰ).Moreover,the zoning map of landslide’s crushing and disintegration is given,and it has reference value for analyzing landslide risk distribution.