CAJ | 학술논문

表明,随顶板厚度与溶洞位置偏移的增大,极限承载力逐渐增大,随溶洞直径、赤道半径与极半径的增大,极限承载力逐渐减小;破坏核体在竖直方向上基本未超过3d(d 为桩体直径)范围,在水平方向上基本未超过4d 范围.结合模型试验结果,影响因素的敏感性分析表明,敏感度大小的顺序为:溶洞直径>顶板厚度、赤道半径>极半径>溶洞位置.嵌岩桩的承载能力还与溶洞形状有关,厚径比为溶洞顶板厚度、赤道半径以及桩体底面积的综合影响因素,建议引进形状系数?与底面积尺寸效应系数?,提出岩溶区嵌岩桩概念设计的注意事项,并通过工程实例进行了验证,现场静载试验与模型试验结果基本一致,楼房竣工后未发生岩溶危害.:基于室内模型试验,对岩溶区嵌岩桩承载能力的影响因素进行了研究.试验距离
표명,수정판후도여용동위치편이적증대,겁한승재력축점증대,수용동직경、적도반경여겁반경적증대,겁한승재력축점감소;파배핵체재수직방향상기본미초과3d(d 위장체직경)범위,재수평방향상기본미초과4d 범위.결합모형시험결과,영향인소적민감성분석표명,민감도대소적순서위:용동직경>정판후도、적도반경>겁반경>용동위치.감암장적승재능력환여용동형상유관,후경비위용동정판후도、적도반경이급장체저면적적종합영향인소,건의인진형상계수?여저면적척촌효응계수?,제출암용구감암장개념설계적주의사항,병통과공정실례진행료험증,현장정재시험여모형시험결과기본일치,루방준공후미발생암용위해.:기우실내모형시험,대암용구감암장승재능력적영향인소진행료연구.시험거리
Based on indoor model tests, the research on factors influencing bearing capacity of rock-socketed piles in karst area is carried out. The tests indicate that, with the increases of roof thickness and cave migration position, the ultimate bearing capacity increases gradually; with the increases of cave diameter, equatorial and polar radius, the ultimate bearing capacity decreases gradually. The failure zones are less than 3d range at vertical direction and less than 4d range at horizontal direction. Combined with the model test results, the analysis of influencing factor sensitivities show that, the size order of sensitivities is cave diameter, roof thickness and equatorial radius, polar radius, cave position. The bearing capacity of rock-socketed pile also had relation with cave shape; ratio of thickness to radius is a comprehensive affecting factor with cave thickness, equatorial radius and pile bottom area. The shape factor ?, bottom area size effect ? and notices of conceptual design are introduced to evaluate the bearing capacity of rock-socketed pile, which are verified by engineering examples. The field test results are in agreement with the model test results, and the karst problems not occurred after building completion.