岩溶地区桩锚基坑支护动态设计  

Dynamic designing for pile-anchor support foundatin pit in karst area

作　　者：黄俊光[1] 林祖锴[1] 李伟科[1] 罗永健[1] 

机构地区：[1]广州市设计院,广州510620

出　　处：《建筑结构》2017年第9期94-97,共4页Building Structure

基　　金：国家自然科学基金项目(51608138)

摘　　要：岩溶地区地质环境复杂,基坑支护设计挑战较大。基于岩溶地区的某基坑支护工程实例,一方面通过采用已施做的支护桩揭露的地质情况修正地质剖面中岩面线和溶洞分布情况的方法进行入岩深度的动态确定;另一方面通过注浆率判定锚索穿过的不明溶(土)洞大小和位置,合理调整锚索角度、位置等避开溶(土)洞。结果表明,对岩溶地区基坑支护工程支护桩进行动态设计确保了基坑安全可靠。As the geological environment in karst area is complex, the design of pile-anchor support present a grater challenge. Based on the project of pile-anchor support foundation pit in karst area, on the one hand, the embedding depth was dynamic determined ; on the other hand, aaccording to the geilogieal conditions exposed by the existed support pile, the geological profile and karst cave distribution is revised. Then, the angle and position of anchor cable were adjusted to advoid karst hole by judging the angle and position of karst hole according to the existed anchor cable. The results show that the dynamic design for pile-anchor support, ensures the safety and reliable foundation pit support and protection.

关 键 词：岩溶基坑 动态设计 桩锚支护 嵌固深度 锚索 

分 类 号：TU473[建筑科学—结构工程]